CN113203564A

CN113203564A - Differential performance testing device for centrifuge

Info

Publication number: CN113203564A
Application number: CN202110620156.XA
Authority: CN
Inventors: 邹振家; 杜恒志; 高四虎; 王明明; 尹贤鹏
Original assignee: Guinarsan Qingdao Machinery Ltd
Current assignee: Guinarsan Qingdao Machinery Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-08-03

Abstract

The invention discloses a performance testing device for a differential mechanism for a centrifugal machine, which comprises a base, wherein a differential mechanism fixing support, a speed reducer support, a torque sensor support, a bearing seat support and a motor support are fixedly arranged on the base; the motor is fixedly arranged on the motor bracket and is connected with the differential mechanism; one end of the transmission shaft is connected with the differential mechanism; the bearing block is fixedly arranged on the bearing block bracket, and the transmission shaft penetrates through the bearing block; the torque sensor is connected with the other end of the transmission shaft and fixedly arranged on the torque sensor bracket; an output shaft of the speed reducer is connected with the torque sensor; and the eddy current brake is fixedly arranged on the base and is connected with the speed reducer. The invention has simple structure, can detect the performance of the existing differential and the design of the auxiliary differential, more closely simulate the actual working condition, and test the use condition, the load capacity, the service life and the like of the differential under different torque environments.

Description

Differential performance testing device for centrifuge

Technical Field

The invention relates to the technical field of sludge treatment equipment, in particular to a performance testing device for a differential mechanism for a centrifuge.

Background

The centrifuge of the sludge treatment equipment consists of two rotors, one rotor is called a rotary drum, and the other rotor is a spiral discharger (spiral for short). The working principle is that the rotary drum and the screw rotate at a high speed in the same direction at a certain differential speed, materials are continuously introduced into the conveying screw inner cylinder through the feeding pipe, enter the rotary drum after being accelerated, and heavy solid-phase substances are deposited on the wall of the rotary drum to form a slag layer under the action of a centrifugal force field.

The differential speed is formed by arranging a differential gear. When the rotary drum rotates at high speed, the material in the rotary drum rotates together with the rotary drum and is acted by centrifugal force, the centrifugal force is many times larger than gravity, so that the solid particles can be separated from the liquid and settled on the inner wall of the rotary drum from the axle center of the rotary drum of the centrifuge, the spiral in the rotary drum rotates at a rotating speed lower than or higher than that of the rotary drum and pushes the settled solid particles to a slag outlet, and the liquid phase is discharged from the centrifuge and overflows from the centrifuge and the rotary drum of the centrifuge.

From the above, the differential plays a very important role in the operation of the centrifuge, is a complex and extremely important part, and is a key part for processing sludge separation. However, in practical production and use, if the quality or performance of the differential is unstable, the liquid phase and the solid phase in the centrifuge cannot be separated to achieve an ideal effect, and the solid phase enters the liquid phase to cause the defects of clear liquid pollution and pipeline sedimentation and blockage; more seriously, the torque of the differential mechanism is too large to exceed the rated value, the differential mechanism is directly damaged, the whole machine cannot work, and the actual production is influenced.

Therefore, how to simulate the actual use condition and test the use condition of the differential in different torque environments; testing the load capacity, service life, etc. of a differential is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a performance testing device for a differential mechanism for a centrifugal machine, which is used for simulating the actual use working condition, testing the use condition of the differential mechanism in different torque environments, testing the load capacity of the differential mechanism and testing the service life of the differential mechanism.

The technical scheme of the invention is as follows: a differential performance testing device for a centrifuge includes:

the differential mechanism fixing device comprises a base, wherein a differential mechanism fixing support, a speed reducer support, a torque sensor support, a bearing seat support and a motor support are fixedly arranged on the base; the motor is used for providing power for the rotation of the differential mechanism and fixedly arranged on the motor bracket, and an output shaft of the motor is in transmission connection with an input shaft of the differential mechanism; one end of the transmission shaft is in transmission connection with an output shaft of the differential; the bearing block is fixedly arranged on the bearing block bracket, and the transmission shaft penetrates through the bearing block; the torque sensor is connected with the other end of the transmission shaft and fixedly arranged on the torque sensor bracket; the speed reducer is fixedly arranged on the speed reducer bracket, and an output shaft of the speed reducer is connected with the torque sensor; the eddy current brake is fixedly arranged on the base, and a brake shaft of the eddy current brake is in transmission connection with an input shaft of the speed reducer; the torque sensor is connected with the transmission shaft through a coupler, and the torque sensor is connected with the speed reducer through a coupler; the speed reducer is connected with the eddy current brake through a coupling; the differential mechanism is connected with the motor through a coupling.

Further, the coupler comprises a first coupler, a second coupler and a third coupler, the torque sensor is connected with the transmission shaft through the first coupler, and the torque sensor is connected with the speed reducer through the first coupler; the speed reducer and the eddy current brake are connected through a second coupling; the differential mechanism is connected with the motor through a third coupling; the first coupling comprises a half coupling A, a half coupling B and a pin which is arranged between the half coupling A and the half coupling B and used for connecting the half coupling A and the half coupling B, and a pressing sheet is arranged on the side surface of the coupling B; key grooves are axially formed in the half coupling A and the half coupling B, threaded holes penetrating through the key grooves are formed in the side walls, and set screws are installed in the threaded holes; the third coupling comprises two half-couplings C, a coupling elastomer arranged between the two half-couplings C and a bolt used for connecting the two half-couplings C and the coupling elastomer, wherein the half-couplings C are axially provided with key grooves, threaded holes penetrating the key grooves are formed in the side walls, and set screws are installed in the threaded holes.

Further, the structure of the coupling elastic body is a plate-shaped structure with a hexagonal section.

Furthermore, the transmission shaft is a stepped shaft and comprises a shaft head, a shaft body and a shaft neck which are integrated and coaxial; the shaft head is divided into a first shaft head and a second shaft head, the diameter of the first shaft head is smaller than that of the second shaft head, and a plurality of groups of mounting holes are formed in the end face of the second shaft head.

Furthermore, the number of the bearing seats is two, a bearing spacer is inserted between the two bearing seats, and the transmission shaft is arranged in the bearing spacer.

Further, the base includes the flat board, sets up the foot support of dull and stereotyped bottom is in with the setting the shock pad of foot support bottom, the foot support is the channel-section steel, the crisscross distribution of foot support horizontal and vertical is in dull and stereotyped bottom.

Further, the differential mechanism support is wholly L type, including first riser and with first riser welded first bottom plate, first bottom plate passes through bolted connection and is in on the base, first riser passes through bolted connection with differential mechanism, first riser is offered and is used for the first groove of stepping down that the output shaft of differential mechanism passed.

Further, the speed reducer support is wholly L-shaped, and comprises a second vertical plate and a second bottom plate welded to the second vertical plate, the second bottom plate is connected to the base through bolts, the second vertical plate is connected to the speed reducer through bolts, and a second abdicating groove used for the output shaft of the speed reducer to pass through is formed in the second vertical plate.

Furthermore, the flat plate is welded with a T-shaped groove plate, the T-shaped groove plate is provided with a plurality of T-shaped grooves distributed in parallel, and the differential fixing frame and the motor support are connected to the T-shaped groove plate through T-shaped bolts and nuts.

Further, the differential performance testing device for the centrifugal machine further comprises a controller and a display panel, wherein the controller is electrically connected with the motor, the torque sensor, the display panel and the eddy current brake.

The embodiment of the invention achieves the following beneficial effects:

the embodiment of the invention adopts the technical scheme that an eddy current brake, a speed reducer, a torque sensor, a bearing seat, a differential and a motor are respectively and fixedly arranged on a base. The tested centrifugal machine is fixed on the differential fixing bracket by using a differential, and the motor is used as a power source to drive an input shaft of the differential to rotate; the torque output by the eddy current brake is transmitted to the speed reducer, the torque is further expanded by the proportion of 1:50, and then the torque is transmitted to the output end of the tested differential through the torque sensor, the transmission shaft and the bearing support. The embodiment of the invention provides an opposite resistance for the output part of the differential mechanism, namely the load can be simulated, the structure is simple, the effect is good, and the performance of the existing differential mechanism and the design of the auxiliary differential mechanism can be detected; the practical use working condition can be more closely simulated, and the use condition of the differential under different torque environments can be tested; and testing the load capacity, the service life and the like of the differential.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the overall structure of an embodiment of the present invention.

Fig. 3 is a schematic sectional view of a propeller shaft according to an embodiment of the present invention.

Fig. 4 is a cross-sectional schematic view of a first coupling in accordance with an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a third coupling according to an embodiment of the present invention.

In the figure, 100, a differential; 200. an electric motor; 300. a drive shaft; 310. a first spindle nose; 320. a second spindle head; 321. mounting holes; 330. a shaft body; 340. a journal; 400. a bearing seat; 410. a bearing spacer; 500. a coupling; 510. a first coupling; 511. a half coupling A; 512. a half coupling B; 513. a pin; 514. tabletting; 515. a first set screw; 520. a second coupling; 530. a third coupling; 531. a half coupling C; 532. a coupling elastomer; 533. a second set screw; 534. a socket head cap screw; 600. a torque sensor; 700. a speed reducer; 800. an eddy current brake; 900. a frame; 910. a differential fixing bracket; 920. a motor bracket; 930. a bearing mount bracket; 940. a torque sensor support; 950. a speed reducer bracket; 960. a base; 961. a flat plate; 962. a foot support; 963. a shock pad; 970. t-shaped groove plates.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 2, the present invention provides a performance testing apparatus for a differential 100 for a centrifugal machine, including:

the differential mechanism comprises a rack 900, wherein the rack 900 comprises a base 960, a differential mechanism fixing support 910, a speed reducer support 950, a torque sensor support 940, a bearing seat support 930 and a motor support 920 are fixedly arranged on the base 960, and a differential mechanism 100 to be measured is fixedly arranged on the differential mechanism fixing support 910.

The differential mechanism further comprises a motor 200 for providing power for the rotation of the differential mechanism 100, the motor 200 is fixedly arranged on the motor support 920, and an output shaft of the motor 200 is in transmission connection with an input shaft of the differential mechanism 100. Specifically, the motor 200 is fixedly mounted on the motor support 920 by means of a bolt connection.

And a transmission shaft 300, one end of which is in transmission connection with the output end of the differential 100.

The transmission shaft assembly further comprises a bearing seat 400 fixed on the bearing seat bracket 930 in a bolt connection mode, and the transmission shaft 300 penetrates through the bearing seat 400.

The torque sensor 600 is connected with the other end of the transmission shaft 300 and is fixedly mounted on the torque sensor bracket 940 in a bolt connection manner.

The torque sensor comprises a speed reducer 700 and is fixedly mounted on a speed reducer support 950 in a bolt connection mode, and an output shaft of the speed reducer 700 is connected with the torque sensor 600.

The eddy current brake device further comprises an eddy current brake 800 fixedly mounted on the base 960 in a bolt connection mode, and a brake shaft of the eddy current brake 800 is in transmission connection with an input shaft of the speed reducer 700.

The torque sensor 600 is connected with the transmission shaft 300 through the coupling 500, and the torque sensor 600 is connected with the speed reducer 700 through the coupling 500; the speed reducer 700 and the eddy current brake 800 are connected through a coupling 500; the differential 100 and the motor 200 are connected by a coupling 500.

In this embodiment, the base 960 includes a plate 961, a foot support 962 disposed at the bottom of the plate 961, and a shock pad 963 disposed at the bottom of the foot support 962, specifically, the plate 961 and the foot support 962 are connected by welding, the foot support 962 is welded at the lower portion of the plate 961 in a criss-cross manner, the foot support 962 may be a channel, and the shock pad 963 is adhered to the bottom of the foot support 962 to reduce the influence of the vibration generated by the operation of the apparatus during the test on the test result, and the number of the shock pads is 6, and the specific position may be at four corners of the bottom of the base 960 and in the middle of the bottom. The base 960 may be made of a metal material that is easily welded.

Differential mechanism fixed bolster 910 wholly is the L type, including first riser and with first riser welded first bottom plate, first bottom plate passes through bolted connection on base 960, first riser passes through bolted connection with differential mechanism 100, first riser offers the first groove of stepping down that is used for differential mechanism 100's output shaft to pass, and the structure in first groove of stepping down can be the circular port, and in order to strengthen the joint strength between first riser and the first bottom plate, the welding has strengthening rib and additional support between first riser and the first bottom plate.

The speed reducer support 950 is wholly L-shaped, including the second riser and with second riser welded second bottom plate, the second bottom plate passes through bolted connection on base 960, the second riser with speed reducer 700 bolted connection, the second that is used for speed reducer 700 output shaft to pass is offered to the second riser groove of stepping down, and the structure in groove of stepping down of second can be the circular port, and in order to strengthen the joint strength between second riser and the second bottom plate, the welding has the strengthening rib and strengthens the support between second riser and second bottom plate.

Torque sensor support 940 includes roof, bottom plate and the curb plate of welding as an organic whole, is provided with on the bottom plate to be used for with dull and stereotyped 961 threaded connection's screw hole, be provided with on the roof be used for with torque sensor 600 bolted connection's screw hole.

The bearing bracket 930, the motor bracket 920 and the torque sensor bracket 940 have similar structures and are not described in detail herein.

In order to be suitable for performance tests of differentials 100 of different models and sizes and facilitate installation and positioning of the differential 100 on a device, a T-shaped groove plate 970 is welded at one end of a flat plate 961 of a base 960, a plurality of T-shaped grooves distributed in parallel are formed in the T-shaped groove plate 970, and T-shaped bolt heads are placed in the T-shaped grooves and fixedly connected with a differential fixing support 910 and a motor support 920 through nuts. The structure can flexibly install the differential mechanism 100 and the motor 200 with different models and sizes on the T-shaped groove plate 970, the T-shaped bolt only needs to slide in the T-shaped groove to select the installation position, the installation hole 321 does not need to be drilled at the fixed position, and time and labor are saved.

The motor 200 is a purchased item, and in this embodiment, the motor 200 is a siemens motor 200 with a power of 15 KW.

The torque sensor 600 is a purchased part, in this embodiment, the torque sensor 600 in the southeast to the morning is selected, the torque sensor 600 adopts a cable data transmission mode, is a working principle in a form of cable connection output, can transmit a static torque signal, a rotating torque signal, a dynamic torque signal and a static torque signal, and can operate at a high rotating speed for a long time. The technical indexes are as follows:

1. range of measurement: 0.1-15000N · m;

2. the precision is 0.5 percent F.S;

3. the applicable rotating speed is below 3000 r/min (any rotating speed can be selected);

4. ambient temperature: 0-50 ℃;

5. frequency response: 100 mus.

The reducer 700 is a purchased part, and in this embodiment, the reducer 700NB12-49 of the Qingdao nuclear industry is selected for increasing the torque further for the eddy current brake 800, and the reducer 700 further expands the torque by a ratio of 1:50 and transmits the torque to the output shaft of the differential 100.

The eddy current brake 800 is a purchased part, and in this embodiment, the eddy current brake 800 having a torque of 350Nm for tom-tom is selected.

The coupling 500 comprises a first coupling 510, a second coupling 520 and a third coupling 530, the torque sensor 600 is connected with the transmission shaft 300 through the first coupling 510, and the torque sensor 600 is connected with the speed reducer 700 through the first coupling 510; the speed reducer 700 and the eddy-current brake 800 are connected through a second coupling 520; the differential 100 and the motor 200 are connected by a third coupling 530.

As shown in fig. 3, the transmission shaft 300 is a stepped shaft, and includes a shaft head, a shaft body 330 and a shaft neck 340, which are integrated and coaxial, wherein the portion matched with the bearing is the shaft neck 340, the portion for installing the transmission part is the shaft head, and the shaft body 330 is a non-matching portion connecting the shaft neck 340 and the shaft head.

Specifically, the axle head is further divided into a first axle head 310 and a second axle head 320, and the diameter of the first axle head 310 is smaller than that of the second axle head 320. The end face of the second spindle head 320 is provided with a plurality of groups of mounting holes 321, each group of mounting holes 321 corresponds to the mounting holes 321 matched with the output shafts of the differentials 100 of different models, and performance detection of the differentials 100 of different models and sizes can be conveniently realized on one performance testing device of the differentials 100 for a centrifugal machine. The end face of the second spindle head 320 of the transmission shaft 300 is fixedly connected with the output shaft of the differential 100 through a bolt, the first spindle head 310 of the transmission shaft 300 is connected with the torque sensor 600 through the first coupler 510, and the first spindle head 310 is provided with two key slots for placing flat keys for connection. The shaft journals 340 of the transmission shaft 300 are arranged at two positions and are respectively matched and connected with the bearings in the two bearing seats 400, a bearing spacer 410 is sleeved between the two bearing seats 400, the bearing spacer 410 is used for preventing the bearing in the bearing seats 400 from moving, and the transmission shaft 300 is sleeved in the bearing seats 400 and the bearing spacer 410.

As shown in fig. 4, the first coupling 510 includes a coupling half a511, a coupling half B512, and a pin 513 disposed between the coupling half a511 and the coupling half B512 for connecting the coupling half a511 and the coupling half B512, and a pressing piece 514 is disposed on a side surface of the coupling half B512; the axial of coupling half A511 and coupling half B512 is provided with the keyway, and the keyway shape is rectangular recess, offers the screw hole that pierces through the keyway on coupling half A511 and the coupling half B512 lateral wall, and threaded hole installs first holding screw 515. In this embodiment, two keyways are provided in the coupling halves a511 and B512, and are distributed symmetrically up and down for placing flat keys; the circumference of the coupling part A511 is provided with a first through hole for placing the pin 513, and the diameter of the first through hole is larger than the outer diameter of the pin 513. And a second through hole is formed in the circumference of the half coupling B512, the diameter of the second through hole is smaller than the outer diameter of the pin 513, a counter bore is formed in the connecting surface of the half coupling B512 and the half coupling A511, the diameter of the counter bore is the same as that of the first through hole, and the counter bore and the second through hole are concentric. In order to prevent the pin 513 from moving in the first coupling 510, a pressing piece 514 is provided on the side surface of the coupling B512, and the pressing piece 514 is fixed to the coupling B512 by a bolt.

Before installation, whether the connecting shaft of the torque sensor 600 and the first shaft head 310 of the transmission shaft 300 are concentric or not is checked, the position is adjusted, and after the concentricity is confirmed, the first coupling 510 is installed. The locking force between the coupling 500 and the shaft is adjusted by adjusting the position of the set screw within the threaded bore.

The second coupling 520 and the first coupling 510 are different in size and similar in structure, and differ only in the number of pins 513 and the number of keyways, which are not described herein again.

As shown in fig. 5, the third coupling 530 includes two coupling halves C531, a coupling elastic body 532 disposed between the two coupling halves C531, and a socket head cap screw 534 for connecting the coupling halves C531 and the coupling elastic body 532, the coupling halves C531 are axially provided with a key slot, a threaded hole penetrating through the key slot is formed in a sidewall, and a second set screw 533 is installed in the threaded hole. The coupling elastic body 532 has a plate-like structure having a hexagonal cross section. Two circular holes are formed in the circumference of the half-cycle coupler 500C, the two circular holes are large in diameter and small in diameter and are distributed in a staggered mode, and the number of the circular holes is 6. Round holes with the same diameter are formed in the circumference of the coupler elastic body 532, and the distribution rule of the round holes is the same as that of the two kinds of round holes in the half-circumference coupler 500C. A circular hole is formed at the center of the coupling elastic body 532, and the circular hole is used for the output shaft of the motor 200 to pass through.

The performance testing device for the differential 100 for the centrifugal machine further comprises a controller and a display panel, wherein the controller is electrically connected with 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.

The working process is as follows:

1. the controller controls to start the motor 200, and the differential 100 starts to work by driving the input shaft of the differential 100 to rotate through the third coupling 530.

2. The output shaft of the differential 100 rotates to drive the transmission shaft 300 to rotate, the transmission shaft 300 is connected with the torque sensor 600, the torque sensor 600 is connected with the speed reducer 700 to further drive the speed reducer 700 to rotate, the speed reducer 700 is connected with the eddy current brake 800 to further drive the eddy current brake 800 to rotate, and at the moment, the eddy current brake 800 is not electrified, so that the measured torque of the torque sensor 600 is almost zero. This is considered an unloaded condition.

3. The controller controls to start the eddy current controller, increase current and synchronously apply torque, namely, the torque is continuously increased to the output shaft end of the differential mechanism 100 along with the change of time. In this process, the torque value of the torque sensor 600 on the display panel, which is the test load of the differential 100, can be observed.

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.

The above steps are repeated repeatedly.

In the embodiment, the eddy current brake 800, the speed reducer 700, the torque sensor 600, the bearing seat 400, the differential 100 and the motor 200 are combined and connected, the tested centrifugal machine is fixed on the differential fixing support 910 by the differential 100, 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 speed reducer 700, further expanded by a ratio of 1:50, and transmitted to the output end of the measured differential 100 through the torque sensor 600, the transmission shaft 300 and the bearing support. The embodiment gives an opposite resistance to the output end of the differential 100, namely, the load can be simulated, the structure is simple, the effect is good, and the performance of the existing differential 100 and the design of the auxiliary differential 100 can be detected; the practical use working condition can be more closely simulated, and the use condition of the differential 100 under different torque environments can be tested; the differential 100 is tested for load capacity, service life, etc.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A differential performance testing device for a centrifuge is characterized by comprising:

the differential mechanism fixing device comprises a base (960), wherein a differential mechanism fixing support (910), a speed reducer support (950), a torque sensor support (940), a bearing seat support (930) and a motor support (920) are fixedly arranged on the base (960), and a differential mechanism (100) to be tested is fixedly arranged on the differential mechanism fixing support (910);

the motor (200) is used for providing power for the rotation of the differential (100) and is fixedly arranged on the motor bracket (920), and an output shaft of the motor (200) is in transmission connection with an input shaft of the differential (100);

one end of the transmission shaft (300) is in transmission connection with an output shaft of the differential (100);

the bearing seat (400) is fixedly arranged on the bearing seat bracket (930), and the transmission shaft (300) penetrates through the bearing seat (400);

the torque sensor (600) is connected with the other end of the transmission shaft (300) and is fixedly arranged on the torque sensor bracket (940);

the speed reducer (700) is fixedly arranged on the speed reducer bracket (950), and an output shaft of the speed reducer (700) is connected with the torque sensor (600);

the eddy current brake (800) is fixedly arranged on the base (960), and a brake shaft of the eddy current brake (800) is in transmission connection with an input shaft of the speed reducer (700);

the torque sensor (600) is connected with the transmission shaft (300) through the coupler (500), and the torque sensor (600) is connected with the speed reducer (700) through the coupler (500); the speed reducer (700) is connected with the eddy-current brake (800) through a coupling (500); the differential (100) and the motor (200) are connected through a coupling (500).

2. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the coupling (500) comprises a first coupling (510), a second coupling (520) and a third coupling (530), the torque sensor (600) is connected with the transmission shaft (300) through the first coupling (510), and the torque sensor (600) is connected with the speed reducer (700) through the first coupling (510); the speed reducer (700) and the eddy-current brake (800) are connected through a second coupling (520); the differential (100) and the motor (200) are connected through a third coupling (530);

the first coupling (510) comprises a coupling part A (511), a coupling part B (512) and a pin (513) which is arranged between the coupling part A (511) and the coupling part B (512) and used for connecting the coupling part A (511) and the coupling part B (512), and a pressing sheet (514) is arranged on the side surface of the coupling part B (512); key grooves are axially formed in the half coupling A (511) and the half coupling B (512), threaded holes penetrating through the key grooves are formed in the side walls, and set screws are installed in the threaded holes;

the third coupler (530) comprises two half-couplers C (531), a coupler elastomer (532) arranged between the two half-couplers C (531) and screws used for connecting the two half-couplers C (531) and the coupler elastomer (532), wherein a key groove is axially arranged on the half-coupler C (531), a threaded hole penetrating through the key groove is formed in the side wall, and a set screw is installed in the threaded hole.

3. The differential performance testing device for a centrifugal machine according to claim 2, characterized in that: the structure of the coupling elastic body (532) is a plate-shaped structure with a hexagonal section.

4. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the transmission shaft (300) is a stepped shaft and comprises a shaft head, a shaft body (330) and a shaft neck (340) which are integrated and coaxial; the shaft head is divided into a first shaft head (310) and a second shaft head (320), the diameter of the first shaft head (310) is smaller than that of the second shaft head (320), and a plurality of groups of mounting holes (321) are formed in the end face of the second shaft head (320).

5. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the bearing seats (400) are arranged in two, a bearing spacer (410) is inserted between the two bearing seats (400), and the transmission shaft (300) is arranged in the bearing spacer (410).

6. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the base (960) comprises a flat plate (961), foot supports (962) arranged at the bottom of the flat plate (961) and shock pads (963) arranged at the bottom of the foot supports (962), the foot supports (962) are channel steel, and the foot supports (962) are distributed at the bottom of the flat plate (961) in a transversely-longitudinally staggered mode.

7. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: differential mechanism (100) support is whole to be the L type, including first riser and with first riser welded first bottom plate, first bottom plate pass through bolted connection in on base (960), first riser passes through bolted connection with differential mechanism (100), first riser is offered and is used for the first groove of stepping down that the output shaft of differential mechanism (100) passed.

8. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the speed reducer support (950) is integrally L-shaped and comprises 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) through bolts, the second vertical plate is connected to the speed reducer (700) through bolts, and a second yielding groove used for the output shaft of the speed reducer (700) to penetrate is formed in the second vertical plate.

9. The differential performance testing device for a centrifugal machine according to claim 1, characterized in that: the welding has T type frid (970) on dull and stereotyped (961), be provided with a plurality of parallel distribution's T type groove on T type frid (970), differential mechanism (100) mount with motor support (920) are connected through T type bolt and nut on T type frid (970).

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