50 results about "Beam balance" patented technology

The invention provides a segmented trace hinge moment balance and belongs to the technical field of aerospace force measurement test aerodynamic force measurement. The segmented trace hinge moment balance is of an all-steel-component combined structure. The segmented trace hinge moment balance comprises a measuring device, a thermal insulation device and a limiting protection device. The measuring device comprises a simple-component balance and a six-component beam balance, wherein the central axis of the simple-component balance is perpendicular to the central axis of the six-component beam balance; the simple-component balance is fixed at the free end of the six-component beam balance and is used for measuring a trace hinge moment, and the six-component beam balance measures all the aerodynamic force borne by a control surface and thus corrects the disturbance from the rest of aerodynamic force to the trace hinge moment, so that the resolution ratio and the accuracy of measurement can be improved. The thermal insulation device is arranged on the outer side of the measuring device, so that the heat protection performance and the thermal insulation performance of the measuring device are improved, the temperature effect is reduced, and the accuracy of trace hinge moment measurement in wind tunnel tests under the condition of a high Mach number is improved.

The invention determines density of a sample while the sample is immersed in a gaseous medium having variable density. The apparatus includes a chamber for containing the gaseous medium and the sample, means for selectively varying the density of the gaseous medium over a range of densities, and means for producing electrical signals related to the density of the gaseous medium. In the chamber is a balance beam having a sample pan at a first end and a coil assembly at an opposing second end. Also at the second end of the beam is a first counter-weight having a volume and mass which is substantially equivalent to the volume and mass of sample pan, and which creates a moment that is substantially equivalent to the moment created by the sample pan. At the first end of the beam is a second counter-weight having a volume and mass which is substantially equivalent to the volume and mass of the coil assembly, and which creates a moment which is substantially equivalent to the moment created by the coil assembly. A magnet assembly is disposed adjacent to and magnetically interacts with the coil assembly. A controller provides a coil current to the coil assembly, thereby generating a magnetic field which interacts with the magnet assembly. According to the invention, the interaction between the magnetic field of the coil assembly and the magnet assembly applies a force to the second end of the beam to keep the beam balanced as the density of the gaseous medium in the chamber is varied over the range of densities. A computing device receives the electrical signals related to the density of the gaseous medium and the electrical signal related to the coil current, and calculates the density of the sample based thereon.

The invention discloses a hoisting mechanism for a crane, which is applied to various bridge cranes, gantry cranes and the other devices relative to hoisting job category. The hoisting mechanism consists of a hoisting driving system, a speed measuring device, a wire rope winding monitoring device, a beam balancing device, a crown block assembly, a clutch device, a hand mechanism, an over speed protector, a shaft breaking protector, a flameout limit device, a hoisting limit device, a hook pulley assembly, a wire rope and the other accessories. The hoisting mechanism eliminates the bad effects which are caused by the errors such as hoisting wire rope breaking, hoisting over speed, hoisting over journey, hoisting desynchrony, mechanism switching off, etc. The hoisting mechanism monitors various fault conditions in real time, thereby work is safer when the crane hoists load.

A smart energy-saving pumping unit comprises a walking beam, a horsehead, a tail beam, a support, a base, a main motor, a crank, a connecting rod, a beam hanger, an intelligent control cabinet and a plurality of working condition sensors, wherein the main motor is a low-speed constant-torque permanent magnetic direct drive motor; a motor shaft is connected with the crank; the centrifugal end of the crank is connected with the walking beam through the connecting rod; the walking beam is provided with an external accurate adjustment balancing device or an internal accurate adjustment balancing device; the tail end of the walking beam is provided with a tail beam balancing device; an electronic control unit and a remote terminal intelligent unit are arranged in the intelligent control cabinet; the remote terminal intelligent unit is in wired connection with the electronic control unit; and the remote terminal intelligent unit is wirelessly connected with all the working condition sensors. The smart energy-saving pumping unit disclosed by the invention is high in intelligent automation degree, high in power factor, accurate in adjustment on degree of balance and good in energy-saving effect, and is capable of effectively saving energy by more than 40 percent in comparison with a traditional walking-beam pumping unit.

The invention relates to the petroleum machinery field, in particular relates to an energy-saving oil pumping unit. The invention provides an energy-saving oil pumping unit to overcome the problems of high energy consumption and low efficiency found in the prior art. The oil pumping unit comprises a base support, a motor, a gear box, a crank arm connecting rod system, a beam balancing system, an oil pump, an electric control device and an oil pump volumetric coefficient monitor; a microprocessor, an energy feedback unit, a power module unit, a compensation capacitor and an interval pumping controller are arranged in the electric control device. The energy-saving oil pumping unit has the advantages of reducing power by 20%-50%, maximizing the power saving effect, improving the oil pump volumetric coefficient at the same time, reducing the loss of the oil pumping unit and the abrasion between the pumping rod and the oil pipe, adjusting the punching times optionally and reducing the labor intensity of the workers.

The invention discloses a self-adaptive leveling method and device of a hydraulic support top beam. A main controller monitoring the numerical value of a tilt sensor in real time and feeding results back to a hydraulic support electro-hydraulic system is adopted in the process that a support is controlled by the hydraulic support electro-hydraulic system to lift a column, real-time adjustment is carried out by the main controller according to the angle of tilt of the top beam, a jack starts to be adjusted and balanced when setting load is applied by the stand column, a blind-action probing method is adopted, the value of the tilt sensor is monitored in real time in the motion probing process so as to detect the state of the top beam, and when the numerical value of the tilt sensor is within a top beam balance error range, leveling is completed. By means of the self-adaptive leveling method and device, automatic leveling control of the hydraulic support top beam can be achieved under the existing automatic batch control and automatic machine following control modes on the premise that an existing mechanical hydraulic equipment structure is not changed.

The invention relates to a self balance energy storage oil extractor, which has the technical scheme that the self balance energy storage oil extractor mainly consists of a walking beam balance system, a crank balance system, a lever lifting system and a motive power lifting system, wherein the walking beam balance system is fixed on one end of a base of the oil extractor, the other end of a walking beam is connected with the crank balance system through a crank connecting rod, the top ends of a balance block and a crank are connected with the lever lifting system through steel ropes, the lever lifting system is connected with the motive power lifting system through steel ropes, a balance transmission wheel is connected with a balance transmission sub wheel in the motive power lifting system through a balance transmission wheel chain, the kinetic energy generated by free falling of a rod string in an oil well when the oil extractor descends is converted into the kinetic energy of lifting the balance block and the crank, and the potential energy of the balance block is stored. The invention has the advantages that the self kinetic energy of the system is fully utilized for completing the potential energy supplementation, and the auxiliary motor motive power is furthest reduced, so the effect of energy saving is reached.

The invention discloses a bidirectional hydraulic jack. A through cavity is formed in a cylinder barrel. The two ends of the cylinder barrel are provided with a first guide sleeve and a second guide sleeve respectively. The side wall of the cylinder barrel is provided with a first connector base, a second connector base and a third connector base which are communicated with the through cavity. A first piston rod and a second piston rod are arranged in the cylinder barrel and stretch out of a middle opening in the first guide sleeve and a middle opening in the second guide sleeve respectively, a first piston and a second piston are arranged on the outer wall of the first piston rod and the outer all of the second piston rod respectively, the first piston is located between the first connector base and the second connector base in the cylinder barrel, the second piston is located between the second connector base and the third connector base, and sealing pieces are arranged between the pistons and the cylinder barrel and among the guide sleeves and the piston rods respectively. The hydraulic support top beam balance keeping device is compact in whole structure, reasonable in design, capable of achieving bidirectional hydraulic support, stable and reliable in structure in the repeated use process and high in mechanical accuracy.

The invention relates to a suspension beam-balanced energy-saving pumping unit, comprising a frame, a suspension mechanism, a power drive and an intelligent control system. The invention is characterized in that: an oscillating arm mechanism is connected with a cross beam and a tail beam to form a steady walking-beam structure; and power drives a device to operate through the suspension mechanism. The suspension beam-balanced energy-saving pumping unit simultaneously commences reforming the mechanical structure and improving the related matched electrically driving and controlling mode, rejects a four-bar mechanism required by power driving of the prior beam-balanced pumping unit, and has the advantages of simple structure, reliable operation, good balancing performance, high system efficiency, low manufacturing cost and operating maintenance cost, convenient hoisting and arrangement, prominent energy conservation effect and so on.

The invention discloses a self-adaptive leveling method and device of a hydraulic support top beam. A main controller monitoring the numerical value of a tilt sensor in real time and feeding results back to a hydraulic support electro-hydraulic system is adopted in the process that a support is controlled by the hydraulic support electro-hydraulic system to lift a column, real-time adjustment is carried out by the main controller according to the angle of tilt of the top beam, a jack starts to be adjusted and balanced when setting load is applied by the stand column, a blind-action probing method is adopted, the value of the tilt sensor is monitored in real time in the motion probing process so as to detect the state of the top beam, and when the numerical value of the tilt sensor is within a top beam balance error range, leveling is completed. By means of the self-adaptive leveling method and device, automatic leveling control of the hydraulic support top beam can be achieved under the existing automatic batch control and automatic machine following control modes on the premise that an existing mechanical hydraulic equipment structure is not changed.

The invention relates to a novel beam-balanced pumping unit which mainly consists of a motor (1), a conveying belt (2), a speed reducer (3), a crank (4), a bracket (5), a horse head (6), a lifting rope (7), a pumping rod (8), a walking beam (9), a connecting rod (10), a balancing weight (11), an extension rod (12), a brake (13), a support rod (14) and a handle (15), wherein the front end of the walking beam (9) is provided with the horse head (6), and the rear end thereof is articulated with the balancing weight (11); one end of the extension rod (12) is articulated with the walking beam, and the other end thereof is articulated with the balancing weight; the middle part of the extension rod (12) is provided with a screw rod with opposite rotating directions at the two ends; and the extending end at the lower part of the screw rod is provided with a handle (15) which is used for driving the screw rod in the middle part of the extension rod (12), the extension rod (12) can be elongated or contracted, and the balancing weight (11) swings forward or backward, so that the adjusting work of trimming moment can be completed. The novel beam-balanced pumping unit omits a small balancing weight which is inconvenient for management, adopts the walking beam for balancing so as to be convenient for management, and has good balancing effect and low energy consumption.

The invention provides a construction control method for a single-leaning-tower cable-stayed bridge. In the construction process, multiple control means of supporting active jacking force, stay cable tensioning force and main beam balance weight are adopted. On the basis of a finite element model, the maximum stress safety margin in the structure construction process is taken as the principle, the complexity of construction reduction is considered, and the optimal jacking force, inhaul cable tensioning force and main beam balance weight scheme is obtained. The construction control method comprises the following steps: establishing a full-bridge refined construction process finite element model, and accurately simulating the influence of a support jacking force, an inhaul cable tension force and a main beam counterweight on structure construction stress in the model; in the model, the optimal combination scheme of the optimal jacking force, the inhaul cable tension force and the main beam counterweight is obtained through sensitivity analysis. The method has the beneficial effects that the construction difficulty of the leaning tower is reduced, the stress and the line shape of the leaning tower in the construction process are more accurately controlled by adopting multiple control means in combination with a finite element method, and the safety of the structure construction process is ensured.

The present invention relates to electricity-saving technology of various beam type oil extractor in oil field. An energy-saving startup wheel of oil field oil extractor which can prolong starting time, decrease equipped capacitor and a method of energy-saving are disclosed. The startup wheel includes: adjustable mechanical limit twist member placed in the wheel case, non-rigid connection between wheel case and electrical machine shaft. Method: computing new electrical machine minimum theoreticl horsepower by using oil extractor static twist resistance, selecting average load ratio, selecting little capacity new electrical machine with high slip ratio, computing oil extractor power regulated by flywheel; computing startup wheel outer dimension, adjusting startup wheel limit-torsional moment;determining flywheel minimum inertia to design flywheel; correcting static twist resistance chart according to increased additional weight number on the beam, verifying average load ratio of new electrical machine. Because the invention adopts startup wheel, flywheel, beam balancing and selecting corresponding new electrical machine, electricity-saving ratio lies in 30-50% is obtained in economical, maximum, safe and reliable, and comparing with the present technology, it induces the installation power reducing greatly 1 / 3-1 / 4.

The invention discloses a six-component multi-piece beam type balance for parallel hanging rack CTS (Compatibility Test Suite) testing. The balance comprises two launching racks, a hanging rack and anL-shaped hanging rack, wherein the two launching racks are connected through a reinforcing beam; a hanging elastic model is fixedly connected with below each launching rack; the hanging rack is positioned between the two launching racks and is connected with the reinforcing beam; the L-shaped hanging rack is positioned above the hanging rack; one end of the L-shaped hanging rack is connected withthe hanging rack through a plurality of I-shaped beams; the other end of the L-shaped hanging rack is connected with a six-freedom degree mechanism; the two launching racks, the hanging rack and theL-shaped hanging rack are of an integral structure; a balance is arranged on the L-shaped hanging rack. By adopting the balance, CTS testing can be successfully caused out in a wind tunnel of a magnitude of 1.5m, a good base can be made for relatively real parallel hanging rack CTS testing simulation in a relatively large wind tunnel in the future, and testing result data as technical support canbe provided for design of parallel hanging racks.

The invention provides a fault diagnosing and health monitoring device on the basis of piezoelectric vibration energy collection. The fault diagnosing and health monitoring device comprises a box, a frequency acquisition apparatus, a circuit switching portion and an indicator lamp array. The frequency acquisition apparatus and the circuit switching portion are arranged in the box, the indicator lamp array is arranged on a surface of the box, the frequency acquisition apparatus comprises a cantilever beam fixing plate, a cantilever beam array, cantilever beam balancing weights and PVDF (polyvinylidene fluoride) piezoelectric materials, the cantilever beam fixing plate is arranged on the inner surface of the box, the cantilever beam array is arranged on the cantilever beam fixing plate, thecorresponding cantilever beam balancing weight is arranged at a free end of each cantilever beam of the cantilever beam array, the corresponding PVDF piezoelectric materials are arranged on the uppersurface of each cantilever beam of the cantilever beam array, PVDF piezoelectric material electrodes are further connected with the upper surfaces and the lower surfaces of the PVDF piezoelectric materials, the circuit switching portion is arranged in the inner middle of the box and is connected with the PVDF piezoelectric material electrodes and corresponding indicator lamps, and the number of the indicator lamps corresponds to that of the cantilever beams. The fault diagnosing and health monitoring device has the advantages of simple structure, small volume, low energy consumption and manufacturing cost, zero pollution and low service life.

The invention relates to a motor lorry component, in particular to a double-beam balance suspending frame. The suspending frame comprises two bases and a balance beam installed on the bases, the middle of the balance beam is of a U-shaped concave structure, and the balance beam is installed between the two bases. The suspending frame is characterized in that a second balance beam is further included and is formed by cut steel plates, the two ends of the second balance beam are provided with balance beam threaded holes, the upper faces of the bases are provided with integrated components extending upwards, the side faces of the extending components are provided with base threaded holes matched with the balance beam threaded holes, the second balance beam is installed between the upper faces of the two bases by means of screws through the balance beam threaded holes and the base threaded holes, and the second balance beam is formed by multiple steel plates. The double-beam balance suspending frame has the advantages of being high in load bearing capacity and not prone to being deformed or damaged and can meet requirements of high loads.

The invention discloses a bidirectional hydraulic jack. A through cavity is formed in a cylinder barrel. The two ends of the cylinder barrel are provided with a first guide sleeve and a second guide sleeve respectively. The side wall of the cylinder barrel is provided with a first connector base, a second connector base and a third connector base which are communicated with the through cavity. A first piston rod and a second piston rod are arranged in the cylinder barrel and stretch out of a middle opening in the first guide sleeve and a middle opening in the second guide sleeve respectively, a first piston and a second piston are arranged on the outer wall of the first piston rod and the outer all of the second piston rod respectively, the first piston is located between the first connector base and the second connector base in the cylinder barrel, the second piston is located between the second connector base and the third connector base, and sealing pieces are arranged between the pistons and the cylinder barrel and among the guide sleeves and the piston rods respectively. The hydraulic support top beam balance keeping device is compact in whole structure, reasonable in design, capable of achieving bidirectional hydraulic support, stable and reliable in structure in the repeated use process and high in mechanical accuracy.

The invention discloses a balancing hanging beam used for blower fan single blade suspension setting. The balancing hanging beam comprises a hanging device T-shaped beam, a lateral travelling mechanism, longitudinal travelling mechanisms, a lateral beam sleeve, and longitudinal beam sleeves; the hanging device T-shaped beam comprises a lateral beam and a longitudinal beam; one end of the lateral beam is connected with the middle part of the longitudinal beam; the lateral beam sleeve can be arranged on the lateral beam along a lateral beam linear direction via slide installation; the lateral travelling mechanism is arranged on the top part of the lateral beam; the longitudinal beam sleeves comprise a first longitudinal beam sleeve and a second longitudinal beam sleeve; the first longitudinal beam sleeve can be arranged on one end of the longitudinal beam along a longitudinal beam linear direction via slide installation, and the second longitudinal beam sleeve can be arranged on the other end of the longitudinal beam along a longitudinal beam linear direction via slide installation; the longitudinal travelling mechanisms comprise a first longitudinal travelling mechanism and a second longitudinal travelling mechanism; and the first longitudinal travelling mechanism is arranged on one end of the longitudinal beam, and the second longitudinal travelling mechanism is arranged on the other end of the longitudinal beam. The balancing hanging beam is suitable for blower fan single blade installation or disassembly high above the ground, and is excellent in stability and safety.

The invention provides a heavy bi-functional press movable beam balance control loop with returning and loading functions. The heavy bi-functional press movable beam balance control loop comprises an oil tank, a variable pump oil supply sub-loop, a left inlet oil control sub-loop, a right inlet oil control sub-loop, an upper balance cylinder unloading sub-loop, a lower balance cylinder unloading sub-loop, an upper balance cylinder and a lower balance cylinder which is arranged on the lower surface of a movable beam and arranged at the position in corner symmetrical with the upper balance cylinder. The variable pump oil supply sub-loop communicates with the upper balance cylinder and a lower adjusting cylinder through the left inlet oil control sub-loop, and the variable pump oil supply sub-loop communicates with the lower balance cylinder and an upper adjusting cylinder. The heavy bi-functional press movable beam balance control loop can carry out balance control over the movable beam and can carry out returning control or auxiliary loading on the movable beam when balance control is not carried out so that the technical problems that an existing heavy press movable beam balance loop only meets the low-speed movement requirement of the movable beam during die forging and cannot meet the high-speed requirement of the movable beam during perpendicular extruding, the function is singular, and the utilization rate is low can be solved.

The present invention relates to electricity-saving technology of various beam type oil extractor in oil field. An energy-saving startup wheel of oil field oil extractor which can prolong starting time, decrease equipped capacitor and a method of energy-saving are disclosed. The startup wheel includes: adjustable mechanical limit twist member placed in the wheel case, non-rigid connection betweenwheel case and electrical machine shaft. Method: computing new electrical machine minimum theoreticl horsepower by using oil extractor static twist resistance, selecting average load ratio, selectinglittle capacity new electrical machine with high slip ratio, computing oil extractor power regulated by flywheel; computing startup wheel outer dimension, adjusting startup wheel limit-torsional moment;determining flywheel minimum inertia to design flywheel; correcting static twist resistance chart according to increased additional weight number on the beam, verifying average load ratio of new electrical machine. Because the invention adopts startup wheel, flywheel, beam balancing and selecting corresponding new electrical machine, electricity-saving ratio lies in 30-50% is obtained in economical, maximum, safe and reliable, and comparing with the present technology, it induces the installation power reducing greatly 1 / 3-1 / 4.

The invention provides an adjustable type longitudinal beam balance shaft set hole drilling template. The adjustable type longitudinal beam balance shaft set hole drilling template comprises an M15 screw and a countersunk head hexagon bolt; the diameter of a screw adjusting hole formed in an aerofoil drill positioning template is 18 mm, and five through holes are formed in the top end face of theaerofoil drill positioning template; a ventral side position is of a rectangular plate-shaped structure, and two positioning holes are formed in the front end of the interior of the ventral side position; the M15 screw is mounted on the aerofoil drill positioning template, and the top of the countersunk head hexagon bolt is mounted in the bottom of the aerofoil drill positioning template; the jackscrew height of the M15 screw on the aerofoil drill positioning template can be adjusted advantageously, thereby ensuring that the device is capable of better adapting the different height of a drilltemplate and an L plate, ensuring that when the drill template is clamped, the drill template and the L plate apply mutually acts and do not shake relatively, ensuring the set hole drilling quality, and avoiding occurrence of the hole position shafting problem completely.

The invention relates to a self balance energy storage oil extractor, which has the technical scheme that the self balance energy storage oil extractor mainly consists of a walking beam balance system, a crank balance system, a lever lifting system and a motive power lifting system, wherein the walking beam balance system is fixed on one end of a base of the oil extractor, the other end of a walking beam is connected with the crank balance system through a crank connecting rod, the top ends of a balance block and a first crank are connected with the lever lifting system through steel ropes, the lever lifting system is connected with the motive power lifting system through steel ropes, a balance transmission wheel is connected with a balance transmission sub wheel in the motive power lifting system through a balance transmission wheel chain, the kinetic energy generated by free falling of a rod string in an oil well when the oil extractor descends is converted into the kinetic energy of lifting the balance block and the first crank, and the potential energy of the balance block is stored. The invention has the advantages that the self kinetic energy of the system is fully utilized for completing the potential energy supplementation, and the auxiliary motor motive power is furthest reduced, so the effect of energy saving is reached.

A ribbon hub and spool assembly includes a hub having at least two cantilever beams having a smooth, tapered, and curved crown, and a spool having curved and tapered splines. The cantilever beams balance the forces when inserting the hub into the spool, and the shape of the crowns of the hub and splines of the spool enable easy insertion and alignment of the hub and spool assembly.

The invention relates to the technical field of oil field oil pumping equipment, and discloses a walking beam balance weight type oil pumping unit which is characterized in that a supporting beam is movably mounted on a middle support of the upper surface of a bottom plate through a bearing, a mounting shell is welded to the left side of the upper surface of the bottom plate, and two mounting rods are symmetrically welded to the lower portion of an inner cavity of the mounting shell; and the same bearing shell is arranged on the outer walls of the two mounting rods in a sliding manner. When the walking beam counterweight type pumping unit is used, the first lead screw is arranged to drive the adjusting plate to move, the position of the electric sliding block is adjusted, the pumping unit can be applied to different stroke heights for counterweight under the action of the steel wire rope, and the distance between the two ends of the compression spring is adjusted according to the elastic coefficient of the compression spring; the position of the balancing weight can be changed in a self-adaptive mode under the action of elastic force of the compression spring, and therefore the problems that energy is wasted in the stroke process of the pumping unit, and meanwhile electrical equipment is impacted and damaged are solved.

The present invention relates to a simple pendulum variable pitch balancing walking-beam pumping unit. It is characterized by that the upper end of walking beam is equipped with a simple pendulum device, in the middle portion of supporting frame of simple pendulum a rack guideway is fixed, in the middle portion of pendulum bar a motor is fixedly connected. Said motor can be reciprocally moved on the rack guideway. Said invention also includes a controller, said controller can be used for detecting load and controlling motor so as to greatly raise efficiency of motor.

The invention discloses a lower cross beam balance device of an ultralarge powder forming machine. The device comprises a first connecting mechanism, a second connecting mechanism, a steering connection head and an extension cylinder; the first connecting mechanism comprises a fixed bracket, a first connecting shaft, a flange end cover, a shaft sleeve, a transition shaft sleeve, a flange shaft sleeve and a first locking nut; the fixed bracket comprises a first mounting plate and a mounting base; one end of the first connecting shaft cooperates with the mounting base; the other end of the firstconnecting shaft is connected into a shaft hole of a steering head at the upper end of a connecting head, and extends out of the shaft hole; a thread is arranged at the shaft hole extension end, andis axially positioned by adopting a first locking nut; a shaft shoulder is arranged on the first connecting shaft between the mounting base and a steering head for axially positioning the first connecting shaft; and a fixed base is fixedly connected to the lower end of the extension cylinder, and is connected to a lower box base through the second connecting mechanism. When the balance device is mounted on equipment, the position can be finely adjusted by the thread depth cooperation and the extension cylinder rotation to realize flexible installation.

The invention provides a heavy bi-functional press movable beam balance control loop with returning and loading functions. The heavy bi-functional press movable beam balance control loop comprises an oil tank, a variable pump oil supply sub-loop, a left inlet oil control sub-loop, a right inlet oil control sub-loop, an upper balance cylinder unloading sub-loop, a lower balance cylinder unloading sub-loop, an upper balance cylinder and a lower balance cylinder which is arranged on the lower surface of a movable beam and arranged at the position in corner symmetrical with the upper balance cylinder. The variable pump oil supply sub-loop communicates with the upper balance cylinder and a lower adjusting cylinder through the left inlet oil control sub-loop, and the variable pump oil supply sub-loop communicates with the lower balance cylinder and an upper adjusting cylinder. The heavy bi-functional press movable beam balance control loop can carry out balance control over the movable beam and can carry out returning control or auxiliary loading on the movable beam when balance control is not carried out so that the technical problems that an existing heavy press movable beam balance loop only meets the low-speed movement requirement of the movable beam during die forging and cannot meet the high-speed requirement of the movable beam during perpendicular extruding, the function is singular, and the utilization rate is low can be solved.

A device for identifying gold and silver jewellery is disclosed that includes a beam balance and an opening syringe. The syringe is connected with conduit and gripper, a pallet for loading water is hung at the two ends of the crossbeam of beam balance, two hooks which could hang jewellery are mounted on the right side of the support bracket, the distance from the hook to the support bracket based on the ratio of the distance from the left pallet to the support bracket equals with the ratio between the water density and the gold or silver density. Then balanced relation of unequal-arm lever is adopted to identify the jewellery with the proportional relation of weight between the gold or silver and water with the same volume. Without damage of jewellery, it can identify the jewellery correctly by limited operations.

The invention relates to a six-component multiple-chip-beam type balance used for CTS (captive trajectory simulation) test of paralleled hanger put in overall. The six-component multiple-chip-beam type balance comprises bomb hanging models, launching racks, a plurality of reinforcing ribs, a pillar beam, a plurality of chip beams and a secondary hanger, a fixed plate is perpendicularly arranged atthe left end of the pillar beam, a lower end face of the right end of the pillar beam is connected with a middle portion of an upper end face of the paralleled hanger through the chip beams, cover plate fixing holes are formed in the left end of the paralleled hanger, strain-gauge array bridges are pasted on the pillar beam and the chip beams, two side walls of the right end of the paralleled hanger are connected with the secondary hanger through the reinforcing ribs, the launching racks are arranged on lower end faces of the secondary hanger positioned below the paralleled hanger, and the bomb hanging models are arranged at the lower ends of the launching racks. The six-component multiple-chip-beam type balance has the advantages that different externally-hung objects on the balance of the paralleled hanger can be tested, high precision and low interference are achieved, connection strength and precision are enhanced since the hanger balance is connected with the externally-hung objects through pin holes and screws, and overall six-component aerodynamic force tests for three main parts including the hanger / launching rack (paralleled) and the like are achieved when the paralleledhanger are put in overall.