A differential performance testing device for centrifuge

Abstract

The present invention discloses a differential performance test device for a centrifuge, comprising a base, on which a differential fixing bracket, a reducer bracket, a torque sensor bracket, a bearing seat bracket, and a motor bracket are fixedly provided, wherein the differential fixing bracket is fixedly provided with a differential; a motor is fixedly provided on the motor bracket and connected to the differential; a transmission shaft, one end of which is connected to the differential; a bearing seat is fixedly provided on the bearing seat bracket, and the transmission shaft passes through the bearing seat; a torque sensor connected to the other end of the transmission shaft is fixedly provided on the torque sensor bracket; an output shaft of the reducer is connected to the torque sensor; an eddy current brake is fixedly provided on the base and connected to the reducer. The present invention has a simple structure, can detect the performance of existing differentials and the design of auxiliary differentials, can more accurately simulate actual working conditions, and can test the use, load capacity, and service life of differentials under different torque environments.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment equipment, and in particular to a differential performance testing device for a centrifuge. Background Art

[0002] The centrifuge of sludge treatment equipment consists of two rotors, one is called the drum, and the other is the spiral discharger (referred to as the spiral). The working principle is that the drum and the spiral rotate at a certain differential speed in the same direction at high speed. The material is continuously introduced into the inner cylinder of the feeding spiral through the feed pipe, and enters the drum after acceleration. Under the action of the centrifugal field, the heavier solid phase is deposited on the drum wall to form a sediment layer.

[0003] The formation of differential speed is achieved by setting up a differential. When the drum rotates at high speed, the material in the drum rotates with the drum and is acted upon by centrifugal force, which is many times greater than gravity. In this way, solid particles will be separated from the liquid and settle on the inner wall of the drum from the axis of the centrifuge drum. The spiral in the drum rotates at a speed lower or higher than that of the drum and pushes the deposited solid particles to the slag outlet, while the liquid phase flows out of the centrifuge drum from the overflow outlet of the centrifuge.

[0004] As can be seen from the above, the differential plays a pivotal role in the operation of the centrifuge. It is a complex and extremely important component and a key component for sludge separation. However, in actual production and use, if the quality or performance of the differential is unstable, the separation of liquid and solid phases in the centrifuge will not achieve the ideal effect, and the solid phase will enter the liquid phase, causing defects such as clear liquid pollution and pipeline sedimentation blockage; more seriously, the differential torque is too large and exceeds the rated value, the differential is directly damaged, the whole machine cannot work, and the actual production is affected.

[0005] Therefore, how to simulate actual operating conditions and test the use of the differential under different torque environments; how to test the load capacity and service life of the differential, etc., are issues that need to be urgently resolved by those skilled in the art. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention provides a differential performance testing device for a centrifuge, which simulates actual use conditions, tests the use of the differential under different torque environments, and tests the load capacity and service life of the differential.

[0007] The technical solution of the present invention is: a centrifuge differential performance test device, comprising:

[0008] A base, on which a differential fixing bracket, a reducer bracket, a torque sensor bracket, a bearing seat bracket, and a motor bracket are fixed, and a differential to be tested is fixed on the differential fixing bracket; a motor for providing power for the rotation of the differential, fixed on the motor bracket, and the output shaft of the motor is connected to the input shaft of the differential by driving; a transmission shaft, one end of which is connected to the output shaft of the differential by driving; a bearing seat, fixed on the bearing seat bracket, and the transmission shaft passes through the bearing seat; a torque sensor connected to the other end of the transmission shaft, fixed on the torque sensor bracket; a reducer, fixedly mounted on the reducer bracket, and the output shaft of the reducer is connected to the torque sensor; an eddy current brake, fixed on the base, and the brake shaft of the eddy current brake is connected to the input shaft of the reducer by driving; a coupling, the torque sensor and the transmission shaft are connected by a coupling, and the torque sensor and the reducer are connected by a coupling; the reducer and the eddy current brake are connected by a coupling; the differential and the motor are connected by a coupling.

[0009] Further, the coupling includes a first coupling, a second coupling and a third coupling; the torque sensor and the transmission shaft are connected via the first coupling, the torque sensor and the reducer are connected via the first coupling; the reducer and the eddy current brake are connected via the second coupling; the differential and the motor are connected via the third coupling; the first coupling includes a half coupling A, a half coupling B and a coupling disposed between the half coupling A and the half coupling B for connecting the half coupling A and the half coupling B. The pin of coupling B is provided with a pressure plate on the side of coupling B; half-coupling A and half-coupling B are axially provided with keyways, and threaded holes penetrating the keyways are provided on the side walls, and set screws are installed in the threaded holes; the third coupling includes two half-couplings C, a coupling elastomer arranged between the two half-couplings C, and bolts for connecting the two half-couplings C and the coupling elastomer, the half-coupling C is axially provided with a keyway, and threaded holes penetrating the keyways are provided on the side walls, and set screws are installed in the threaded holes.

[0010] Furthermore, the coupling elastomer has a plate-like structure with a hexagonal cross section.

[0011] Furthermore, the transmission shaft is a stepped shaft, including an integral and coaxial shaft head, shaft body and shaft neck; the shaft head is further divided into a first shaft head and a second shaft head, the diameter of the first shaft head is smaller than the diameter of the second shaft head, and the end face of the second shaft head is provided with several groups of mounting holes.

[0012] Furthermore, two bearing seats are provided, a bearing spacer is inserted between the two bearing seats, and the transmission shaft is provided in the bearing spacer.

[0013] Furthermore, the base includes a flat plate, a foot support arranged at the bottom of the flat plate, and a shock-absorbing pad arranged at the bottom of the foot support. The foot support is a channel steel, and the foot support is distributed horizontally and vertically at the bottom of the flat plate.

[0014] Furthermore, the differential bracket is L-shaped as a whole, including a first vertical plate and a first bottom plate welded to the first vertical plate, the first bottom plate is connected to the base by bolts, the first vertical plate is connected to the differential by bolts, and the first vertical plate is provided with a first clearance groove for the output shaft of the differential to pass through.

[0015] Furthermore, the reducer bracket is L-shaped as a whole, including a second vertical plate and a second bottom plate welded to the second vertical plate, the second bottom plate is connected to the base by bolts, the second vertical plate is connected to the reducer bolts, and the second vertical plate is provided with a second clearance groove for the output shaft of the reducer to pass through.

[0016] Furthermore, a T-slot plate is welded on the flat plate, and a plurality of parallel T-slots are arranged on the T-slot plate. The differential fixing frame and the motor bracket are connected to the T-slot plate through T-bolts and nuts.

[0017] Furthermore, the centrifuge differential performance testing device also includes a controller and a display panel, and the controller is electrically connected to the motor, the torque sensor, the display panel and the eddy current brake.

[0018] The beneficial effects achieved by the embodiments of the present invention are:

[0019] The embodiment of the present invention adopts eddy current brake, reducer, torque sensor, bearing seat, differential, and motor which are fixed on the base respectively. The centrifuge differential to be tested is fixed on the differential fixing bracket, and the motor is used as a power source to drive the input shaft of the differential to rotate; the torque output by the eddy current brake is transmitted to the reducer, and the torque is further amplified by a ratio of 1:50, and then transmitted to the output end of the differential to be tested through the torque sensor, transmission shaft, and bearing support. The embodiment of the present invention gives an opposite resistance to the output part of the differential, which can simulate the load. It has a simple structure and good effect. It can detect the performance of the existing differential and the design of the auxiliary differential; it can more closely simulate the actual use conditions and test the use of the differential under different torque environments; it can test the load capacity and service life of the differential. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0021] Figure 2 It is a schematic cross-sectional view of the overall structure of an embodiment of the present invention.

[0022] Figure 3 It is a schematic cross-sectional view of a transmission shaft according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic cross-sectional view of a first coupling according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic cross-sectional view of a third coupling according to an embodiment of the present invention.

[0025] In the figure, 100, differential; 200, motor; 300, transmission shaft; 310, first shaft head; 320, second shaft head; 321, mounting hole; 330, shaft body; 340, shaft journal; 400, bearing seat; 410, bearing spacer; 500, coupling; 510, first coupling; 511, half coupling A; 512, half coupling B; 513, pin; 514, pressing plate; 515, first set screw; 520, second coupling; 530, third coupling; 5 31. Half coupling C; 532. Coupling elastomer; 533. Second set screw; 534. Hexagon socket screw; 600. Torque sensor; 700. Reducer; 800. Eddy current brake; 900. Frame; 910. Differential fixing bracket; 920. Motor bracket; 930. Bearing seat bracket; 940. Torque sensor bracket; 950. Reducer bracket; 960. Base; 961. Flat plate; 962. Foot support; 963. Shock-absorbing pad; 970. T-slot plate. DETAILED DESCRIPTION

[0026] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0031] like Figures 1-2 As shown, the present invention provides a performance testing device for a centrifuge differential 100, comprising:

[0032] The frame 900 includes a base 960, on which a differential fixing bracket 910, a reducer bracket 950, a torque sensor bracket 940, a bearing seat bracket 930, and a motor bracket 920 are fixedly mounted, and a differential 100 to be tested is fixedly mounted on the differential fixing bracket 910.

[0033] It also includes a motor 200 for providing power for the rotation of the differential 100, which is fixed on the motor bracket 920, and the output shaft of the motor 200 is drivingly connected to the input shaft of the differential 100. Specifically, the motor 200 is fixedly mounted on the motor bracket 920 by bolt connection.

[0034] It also includes a transmission shaft 300 , one end of which is drivingly connected to the output end of the differential 100 .

[0035] It also includes a bearing seat 400, which is fixed to the bearing seat bracket 930 by bolt connection, and the transmission shaft 300 passes through the bearing seat 400.

[0036] The torque sensor 600 is also included, which is connected to the other end of the transmission shaft 300 and is fixedly mounted on the torque sensor bracket 940 by bolt connection.

[0037] It also includes a reducer 700 which is fixedly mounted on the reducer bracket 950 by bolt connection, and the output shaft of the reducer 700 is connected to the torque sensor 600 .

[0038] It also includes an eddy current brake 800 which is fixedly mounted on the base 960 by bolt connection, and the brake shaft of the eddy current brake 800 is drivingly connected to the input shaft of the reducer 700 .

[0039] It also includes a coupling 500, the torque sensor 600 and the transmission shaft 300 are connected via the coupling 500, the torque sensor 600 and the reducer 700 are connected via the coupling 500; the reducer 700 and the eddy current brake 800 are connected via the coupling 500; and the differential 100 and the motor 200 are connected via the coupling 500.

[0040] In this embodiment, the base 960 includes a flat plate 961, a foot support 962 disposed at the bottom of the flat plate 961, and a shock-absorbing pad 963 disposed at the bottom of the foot support 962. Specifically, the flat plate 961 and the foot support 962 are connected by welding, and the foot support 962 is welded to the lower part of the flat plate 961 in a staggered manner. The foot support 962 can be a channel steel, and a shock-absorbing pad 963 is bonded to the bottom of the foot support 962 to reduce the impact of vibration generated by the operation of the device during the test on the test results. The number of shock-absorbing pads is 6, and the specific positions can be at the four corners and the middle of the bottom of the base 960. The material of the base 960 can be a metal material that is easy to weld.

[0041] The differential fixing bracket 910 is L-shaped as a whole, including a first vertical plate and a first bottom plate welded to the first vertical plate, the first bottom plate is connected to the base 960 by bolts, the first vertical plate is connected to the differential 100 by bolts, the first vertical plate is provided with a first clearance groove for the output shaft of the differential 100 to pass through, and the structure of the first clearance groove can be a circular hole. In order to enhance the connection strength between the first vertical plate and the first bottom plate, reinforcing ribs and reinforcing supports are welded between the first vertical plate and the first bottom plate.

[0042] The reducer bracket 950 is L-shaped as a whole, including a second vertical plate and a second bottom plate welded to the second vertical plate. The second bottom plate is connected to the base 960 by bolts. The second vertical plate is bolted to the reducer 700. The second vertical plate is provided with a second clearance groove for the output shaft of the reducer 700 to pass through. The structure of the second clearance groove can be a circular hole. In order to enhance the connection strength between the second vertical plate and the second bottom plate, reinforcing ribs and reinforcing supports are welded between the second vertical plate and the second bottom plate.

[0043] The torque sensor bracket 940 includes a top plate, a bottom plate and a side plate which are welded together. The bottom plate is provided with a threaded hole for threaded connection with the flat plate 961 , and the top plate is provided with a threaded hole for bolt connection with the torque sensor 600 .

[0044] The structures of the bearing seat bracket 930, the motor bracket 920 and the torque sensor bracket 940 are similar and will not be described in detail here.

[0045] In order to apply to the performance test of the differential 100 of different models and sizes and facilitate the installation and positioning of the differential 100 on the device, a T-slot plate 970 is welded on one end of the flat plate 961 of the base 960. The T-slot plate 970 is provided with a plurality of parallel T-slots. The T-bolt heads are placed in the T-slots and fixedly connected with the differential fixing bracket 910 and the motor bracket 920 through nuts. This structure can flexibly install the differential 100 and the motor 200 of different models and sizes on the T-slot plate 970. The T-bolt only needs to slide in the T-slot to select the installation position, without drilling the installation hole 321 at a fixed position, which saves time and effort.

[0046] The motor 200 is a purchased part. In this embodiment, the motor 200 is a Siemens motor 200 with a power of 15KW.

[0047] The torque sensor 600 is a purchased part. In this embodiment, the torque sensor 600 of Nantong Yuanchen is selected. The torque sensor 600 adopts a cable data transmission method, which is a working principle in the form of cable connection output. It can transmit static torque signals, rotational torque signals, dynamic torque signals, and static torque signals, and can operate at high speed for a long time. The technical indicators are:

[0048] 1. Measuring range: 0.1--15000N·m;

[0049] 2. Accuracy: 0.5% F·S;

[0050] 3. Applicable speed is below 3000 rpm (any speed can be selected);

[0051] 4. Ambient temperature: 0℃-50℃;

[0052] 5. Frequency response: 100μs.

[0053] The reducer 700 is a purchased part. In this embodiment, the reducer 700NB12-49 of Qingdao Nuclear Engineering is selected to increase the torque of the eddy current brake 800. The reducer 700 further increases the torque through a ratio of 1:50 and transmits it to the output shaft of the differential 100.

[0054] The eddy current brake 800 is a purchased part. In this embodiment, the eddy current brake 800 with a torque of 350 Nm produced by Nantong Yuanchen is selected.

[0055] The coupling 500 includes a first coupling 510, a second coupling 520 and a third coupling 530. The torque sensor 600 and the transmission shaft 300 are connected via the first coupling 510, and the torque sensor 600 and the reducer 700 are connected via the first coupling 510; the reducer 700 and the eddy current brake 800 are connected via the second coupling 520; and the differential 100 and the motor 200 are connected via the third coupling 530.

[0056] like Figure 3 As shown, the transmission shaft 300 is a stepped shaft, including an integral and coaxial shaft head, shaft body 330 and shaft neck 340, wherein the part that matches with the bearing is the shaft neck 340, the part for mounting the transmission parts is the shaft head, and the non-matching part of the shaft body 330 connects the shaft neck 340 and the shaft head.

[0057] Specifically, the shaft head is divided into a first shaft head 310 and a second shaft head 320, and the diameter of the first shaft head 310 is smaller than that of the second shaft head 320. The end face of the second shaft head 320 is provided with a plurality of groups of mounting holes 321, and each group of mounting holes 321 corresponds to a mounting hole 321 that matches the output shaft of the differential 100 of different models, so that the performance of the differential 100 of different models and sizes can be tested on a centrifuge differential 100 performance test device. The end face of the second shaft head 320 of the transmission shaft 300 is fixedly connected to the output shaft of the differential 100 by bolts, and the first shaft head 310 of the transmission shaft 300 is connected to the torque sensor 600 by the first coupling 510, and a keyway for placing a flat key is provided on the first shaft head 310, which plays a connecting role. Specifically, in this embodiment, there are two keyways, which are symmetrically distributed in the upper and lower axes. The journal 340 of the transmission shaft 300 is set at two places, which are respectively connected with the bearings in the two bearing seats 400. A bearing spacer 410 is installed between the two bearing seats 400. The bearing spacer 410 is used to prevent the bearings in the bearing seats 400 from moving. The transmission shaft 300 is sleeved in the bearing seats 400 and the bearing spacer 410.

[0058] like Figure 4As shown, the first coupling 510 includes a half coupling A511, a half coupling B512, and a pin 513 arranged between the half coupling A511 and the half coupling B512 for connecting the half coupling A511 and the half coupling B512, and a pressing plate 514 is arranged on the side of the half coupling B512; the half coupling A511 and the half coupling B512 are axially provided with a keyway, and the keyway is in the shape of a long groove, and a threaded hole penetrating the keyway is provided on the side wall of the half coupling A511 and the half coupling B512, and a first set screw 515 is installed in the threaded hole. In this embodiment, the keyways in the half coupling A511 and the half coupling B512 are set to two, symmetrically distributed up and down, for placing flat keys; a first through hole for placing the pin 513 is provided on the circumference of the half coupling A511, and the diameter of the first through hole is greater than the outer diameter of the pin 513. A second through hole is provided on the circumference of the half coupling B512, and the diameter of the second through hole is smaller than the outer diameter of the pin 513. A countersunk hole is provided at the connection surface between the half coupling B512 and the half coupling A511, and the diameter of the countersunk hole is the same as that of the first through hole, and the countersunk hole is concentric with the second through hole. In order to place the pin 513 to move in the first coupling 510, a pressing plate 514 is provided on the side of the half coupling B512, and the pressing plate 514 is fixed to the half coupling B512 by bolts.

[0059] Before installation, check whether the connecting shaft of the torque sensor 600 and the first shaft head 310 of the transmission shaft 300 are concentric, adjust the position, and after confirming the concentricity, install the first coupling 510. The locking force between the coupling 500 and the shaft is adjusted by adjusting the position of the set screw in the threaded hole.

[0060] The second coupling 520 and the first coupling 510 have different sizes but similar structures, and the only difference is the number of pins 513 and the number of keyways, which will not be described here.

[0061] like Figure 5 As shown, the third coupling 530 includes two half-couplings C531, a coupling elastomer 532 arranged between the two half-couplings C531, and a hexagon socket screw 534 for connecting the half-coupling C531 and the coupling elastomer 532. The half-coupling C531 is axially provided with a keyway, and a threaded hole penetrating the keyway is provided on the side wall, and a second set screw 533 is installed in the threaded hole. The structure of the coupling elastomer 532 is a plate-like structure with a hexagonal cross section. Two kinds of circular holes are provided on the circumference of the half-circular coupling 500C. The diameters of the two circular holes are one large and one small, and they are staggered and distributed, with a total of 6. Circular holes of the same diameter are provided on the circumference of the coupling elastomer 532, and the distribution pattern of the circular holes is the same as the distribution of the two circular holes on the half-circular coupling 500C. A circular hole is provided at the center of the coupling elastomer 532, and this circular hole is used to allow the output shaft of the motor 200 to pass through.

[0062] The performance testing device for the centrifuge differential 100 further includes a controller and a display panel, which are electrically connected to the motor 200, the torque sensor 600, the eddy current brake 800, and the display panel. The display panel can display the torque value of the torque sensor 600.

[0063] The working process is as follows:

[0064] 1. The controller starts the motor 200, drives the input shaft of the differential 100 to rotate through the third coupling 530, and the differential 100 starts to work.

[0065] 2. The output shaft of the differential 100 rotates, driving the transmission shaft 300 to rotate. The transmission shaft 300 is connected to the torque sensor 600. The torque sensor 600 is connected to the reducer 700, which in turn drives the reducer 700 to rotate. The reducer 700 is connected to the eddy current brake 800, which in turn drives the eddy current brake 800 to rotate. At this time, the eddy current brake 800 is not powered, so the torque measured by the torque sensor 600 is almost zero. This is considered to be a no-load state.

[0066] 3. The controller starts the eddy current controller, increases the current, and applies torque synchronously, that is, the torque is continuously increased over time to the output shaft end of the differential 100. During this process, the torque value of the torque sensor 600 on the display panel can be observed, and this torque value is the test load of the differential 100.

[0067] 4. When the torque value of the torque sensor 600 reaches the rated load of the differential 100 , the eddy current controller is stopped and the motor 200 is stopped.

[0068] Repeat the above steps repeatedly.

[0069] In this embodiment, a combination of eddy current brake 800, reducer 700, torque sensor 600, bearing seat 400, differential 100, and motor 200 is used. The centrifuge differential 100 to be tested is fixed on the differential fixing bracket 910, and the motor 200 is used as a power source to drive the input shaft of the differential 100 to rotate; the torque output by the eddy current brake 800 is transmitted to the reducer 700, and the torque is further amplified by a ratio of 1:50, and then transmitted to the output end of the tested differential 100 through the torque sensor 600, the transmission shaft 300, and the bearing support. This embodiment gives an opposite resistance to the output end of the differential 100, which can simulate the load, has a simple structure, and has good effect. It can detect the performance of the existing differential 100 and the design of the auxiliary differential 100; it can more closely simulate the actual use conditions, test the use of the differential 100 under different torque environments; and test the load capacity and service life of the differential 100.

[0070] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A centrifuge differential performance test device, characterized in that: include: A base (960), wherein a differential fixing bracket (910), a reducer bracket (950), a torque sensor bracket (940), a bearing seat bracket (930), and a motor bracket (920) are fixedly disposed on the base (960), and a differential (100) to be tested is fixedly disposed on the differential fixing bracket (910); An electric motor (200) for providing power for the rotation of the differential (100), fixedly mounted on the motor bracket (920), the output shaft of the electric motor (200) being drivingly connected to the input shaft of the differential (100); A transmission shaft (300), one end of which is drivingly connected to an output shaft of the differential (100); A bearing seat (400) is fixedly mounted on the bearing seat bracket (930), and the transmission shaft (300) passes through the bearing seat (400); a torque sensor (600) connected to the other end of the transmission shaft (300) and fixedly mounted on the torque sensor bracket (940); A reducer (700) is fixedly mounted on a reducer bracket (950), and an output shaft of the reducer (700) is connected to the torque sensor (600); An eddy current brake (800) is fixedly mounted on the base (960), and a brake shaft of the eddy current brake (800) is drivingly connected to an input shaft of the reducer (700); A coupling (500), wherein the torque sensor (600) and the transmission shaft (300) are connected via the coupling (500), the torque sensor (600) and the reducer (700) are connected via the coupling (500); the reducer (700) and the eddy current brake (800) are connected via the coupling (500); and the differential (100) and the motor (200) are connected via the coupling (500); The coupling (500) comprises a first coupling (510), a second coupling (520) and a third coupling (530); the torque sensor (600) and the transmission shaft (300) are connected via the first coupling (510); the torque sensor (600) and the reducer (700) are connected via the first coupling (510); the reducer (700) and the eddy current brake (800) are connected via the second coupling (520); the differential (100) and the motor (200) are connected via the third coupling (530); the first coupling (510) comprises a half coupling A (511), a half coupling B (512) and a coupling disposed between the half coupling A (511) and the half coupling B (512). 2) a pin (513) for connecting the half coupling A (511) and the half coupling B (512), and a pressing plate (514) is arranged on the side of the half coupling B (512); the half coupling A (511) and the half coupling B (512) are axially provided with a keyway, and a threaded hole penetrating the keyway is opened on the side wall, and a set screw is installed in the threaded hole; the third coupling (530) includes two half couplings C (531), a coupling elastic body (532) arranged between the two half couplings C (531), and a screw for connecting the two half couplings C (531) and the coupling elastic body (532), the half coupling C (531) is axially provided with a keyway, and a threaded hole penetrating the keyway is opened on the side wall, and a set screw is installed in the threaded hole; The transmission shaft (300) is a stepped shaft, comprising an integral and coaxial shaft head, a shaft body (330) and a shaft neck (340); the shaft head is further divided into a first shaft head (310) and a second shaft head (320); the diameter of the first shaft head (310) is smaller than the diameter of the second shaft head (320); and the end surface of the second shaft head (320) is provided with a plurality of groups of mounting holes (321).

2. A centrifuge differential performance test device according to claim 1, characterized in that: The coupling elastic body (532) has a plate-like structure with a hexagonal cross section.

3. A centrifuge differential performance test device according to claim 1, characterized in that: The bearing seats (400) are provided in two numbers, a bearing spacer (410) is inserted between the two bearing seats (400), and the transmission shaft (300) is arranged in the bearing spacer (410).

4. A centrifuge differential performance test device according to claim 1, characterized in that: The base (960) comprises a flat plate (961), a foot support (962) arranged at the bottom of the flat plate (961), and a shock-absorbing pad (963) arranged at the bottom of the foot support (962); the foot support (962) is a channel steel; the foot supports (962) are distributed in a staggered manner at the bottom of the flat plate (961) in a horizontal and vertical manner.

5. The centrifuge differential performance test device according to claim 1, characterized in that: The differential (100) bracket is L-shaped as a whole, comprising a first vertical plate and a first bottom plate welded to the first vertical plate, the first bottom plate being connected to the base (960) by bolts, the first vertical plate being connected to the differential (100) by bolts, and the first vertical plate being provided with a first clearance groove for the output shaft of the differential (100) to pass through.

6. A centrifuge differential performance test device according to claim 1, characterized in that: The reducer bracket (950) is L-shaped as a whole, comprising a second vertical plate and a second bottom plate welded to the second vertical plate, the second bottom plate being connected to the base (960) by bolts, the second vertical plate being bolted to the reducer (700), and the second vertical plate being provided with a second clearance groove for the output shaft of the reducer (700) to pass through.

7. A centrifuge differential performance test device according to claim 4, characterized in that: A T-slot plate (970) is welded to the flat plate (961), a plurality of parallel T-slots are provided on the T-slot plate (970), and the differential (100) fixing frame and the motor bracket (920) are connected to the T-slot plate (970) via T-bolts and nuts.

8. The centrifuge differential performance test device according to claim 1, characterized in that: The centrifuge differential (100) performance test device further comprises a controller and a display panel, wherein the controller is electrically connected to the motor (200), the torque sensor (600), the display panel and the eddy current brake (800).

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