CN212567929U

CN212567929U - High-speed heavy-load comprehensive performance test device in powder metallurgy bearing

Info

Publication number: CN212567929U
Application number: CN202021291259.3U
Authority: CN
Inventors: 陈凯
Original assignee: Luoyang Jingyi New Material Technology Co ltd
Current assignee: Luoyang Jingyi New Material Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-19
Anticipated expiration: 2030-07-06

Abstract

The utility model provides a high-speed heavy load comprehensive properties test device in powder metallurgy bearing, relates to powder metallurgy bearing test field, the utility model discloses a set up well high-speed drive shaft (2), high rigidity test axle mechanism (5) and automatic loading mechanism (1) respectively on shock attenuation bottom plate (7), can realize the high gyration precision 12000 revolutions per minute of stepless speed governing well rotational speed, provide accurate, stable dynamic balance load; a self-adaptive card installing form is provided, and a load force is accurately given; the stable test environment is a stable test environment which is stable and free of vibration interference and fully simulates the use environment of the bearing; high repeatability, high accuracy, long-life, self-cooling, easy operation, easy lubrication etc, the utility model has the characteristics of simple structure, convenient to use etc, be fit for on a large scale popularization and application.

Description

High-speed heavy-load comprehensive performance test device in powder metallurgy bearing

Technical Field

The utility model relates to a powder metallurgy bearing test field, concretely relates to high-speed heavy load comprehensive properties test device in powder metallurgy bearing.

Background

It is known that, due to the influence of the manufacturing process of the bearing, the difference between the size of the outer diameter of the bearing and the roundness is large, the bearing used in a heavy-load environment is mostly fixed by interference fit in practical application, the base multi-purpose steel, aluminum, zinc alloy, plastic and other materials are installed, and the size of the inner diameter of the installed bearing is variable. The existing powder metallurgy oil-retaining bearing testing device in the market has the following defects:

1. when adopting interference fit pressure equipment:

the actual speed measuring range of the existing powder metallurgy oil-retaining bearing test and test equipment is 200 r/min-2800 r/min, 300 r/min-2800 r/min, 20 r/min-600 r/min and the like, and rarely exceeds the rated rotating speed of a common motor; meanwhile, the device is large and heavy in size, a high-power gas station or a hydraulic station needs to be equipped to meet load adjustment, although the load can be changed steplessly, the load is a calculated value of pressure and cylinder diameter, the precision is low, the load size cannot be accurately measured in actual test, the load direction is influenced by the appearance (spherical, cylindrical and special-shaped) of a bearing, and the difference of the load directions is large;

2. the assembly and clamping of the bearing generally adopts a high-concentricity fixed seat, but although the roundness precision of the powder metallurgy oil-retaining bearing is high, the inner and outer diameter concentricity precision is generally 4-10 times of the roundness precision, so that the test repeatability is reduced, meanwhile, the assembly and clamping are mostly interference fit press mounting or transition fit small-clearance movable mounting, and the radial shrinkage caused by the dimensional dispersion of the test bearing is difficult to control, so that the clearance between the test shaft and the test bearing is difficult to control; the variation of the inner diameter of the bearing is large due to the fact that the external diameter size dispersion difference and the screw pretightening force cannot be accurately output, and even the conditions such as roundness and cylindricity of the inner hole of the bearing are changed;

3. the existing powder metallurgy oil-retaining bearing test equipment has the advantages that the traditional motor is adopted as a driving vibration to be large, the noise is large, high-frequency vibration can occur when a hydraulic station or a gas station operates, the vibration can be conducted to a test shaft and a test bearing, the radial runout of the test shaft can be increased, and the temperature value precision and the like of the test bearing in the experiment can be directly influenced.

Therefore, how to provide a high-speed heavy-load comprehensive performance test device in the powder metallurgy bearing becomes a long-term technical demand of the technical personnel in the field.

Disclosure of Invention

In order to overcome the defects in the background technology, the utility model provides a high-speed heavy-load comprehensive performance test device in a powder metallurgy bearing, which can provide accurate and stable dynamic balance load; a self-adaptive card installing form is provided, and a load force is accurately given; the stable test environment is a stable test environment which is stable and free of vibration interference and fully simulates the use environment of the bearing; high repeatability, high precision, long service life, self-cooling, easy operation, easy lubrication, etc.

In order to achieve the above purpose, the present invention adopts the following technical solutions:

a device for testing the comprehensive performance of high-speed and heavy-load in powder metallurgy bearings comprises an automatic loading mechanism, a medium-high speed driving shaft, a medium-high speed and heavy-load self-adaptive clamp, a high-rigidity testing shaft mechanism and a damping bottom plate, a middle-high speed driving shaft is arranged on the left side above the damping bottom plate, high rigidity testing shaft mechanisms are arranged on the right side of the middle-high speed driving shaft at intervals, the power output shaft of the medium-high speed driving shaft is connected with the power input shaft of the high-rigidity testing shaft mechanism through a medium-high speed coupler, the right side of the high-rigidity testing shaft mechanism is provided with automatic loading mechanisms at intervals, the lower part of the automatic loading mechanism is provided with a medium-high speed heavy-load self-adaptive clamp, a bearing is arranged in the middle-high speed heavy-load self-adaptive clamp, the inner ring of the bearing is sleeved on the test shaft, the left end of the test shaft is connected with a power output shaft at the right end of the high-rigidity test shaft mechanism to form the high-speed and heavy-load comprehensive performance test device in the powder metallurgy bearing.

The high-speed heavy-load comprehensive performance test device for the powder metallurgy bearing is characterized in that the damping bottom plate is arranged on the horizontal base plate.

The high-speed heavy-load comprehensive performance test device for the powder metallurgy bearing is characterized in that the rotating speed of the medium-high speed driving shaft is 12000 r/min.

The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing comprises an electric cylinder, a portal frame, a one-way buffer, a force sensor, a spherical connector, a double-point load frame and a medium-high-speed and heavy-load self-adaptive clamp, an electric cylinder is arranged on the portal frame, a main shaft of the electric cylinder is connected with a one-way buffer, the lower end of the one-way buffer is connected with a force sensor, the lower end of the force sensor is connected with a spherical connector, the lower end of the spherical connector corresponds to the upper end face of the double-point load frame, the double-point load frame is fixed at the lower part of the portal frame through a fixed pin shaft, at least two spherical load columns are arranged at the bottom of the inner frame of the double-point load frame at intervals, a middle-high speed heavy-load self-adaptive clamping device is arranged in the inner frame of the double-point load frame, and the lower surface of the middle-high speed heavy-load self-adaptive clamping device is in contact with the upper end faces of the spherical load columns.

The device for testing the comprehensive performance of the high-speed and heavy-load in the powder metallurgy bearing is characterized in that a temperature sensor is arranged below the self-adaptive fixture for the high-speed and heavy-load.

The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing is characterized in that the one-way buffer is a semi-rigid one-way buffer.

The high-speed heavy-load comprehensive performance test device for the powder metallurgy bearing is characterized in that the double-point load frame is an adjustable double-point load frame.

The device for testing the comprehensive performance of the high-speed and heavy-load in the powder metallurgy bearing comprises a fixed base, a conical lock sleeve, an elastic lock sleeve, a conical pressing block and a multifunctional sleeve, wherein the fixed base is arranged on a horizontal substrate, the middle part of the fixed base is provided with a conical lock sleeve mounting hole which is sunken downwards, the inner edge surface of the conical lock sleeve mounting hole is provided with at least two positioning grooves, the conical lock sleeve is arranged in the conical lock sleeve mounting hole, the outer edge surface of the conical lock sleeve is provided with at least two grooves corresponding to the positioning grooves, positioning blocks are arranged in the positioning grooves and the grooves, the middle part of the conical lock sleeve is provided with a stepped hole with a large upper end and a small lower end, the inner edge surface of the lower end of the stepped hole is provided with a conical hole with a large upper end opening and a small lower end opening, the elastic lock sleeve is arranged in the conical hole, and, the lower part of the outer edge surface of the elastic locking sleeve is provided with a lower conical surface with a small lower end and a large upper end, the upper part of the outer edge surface of the elastic locking sleeve is provided with an upper conical surface with a small upper end and a large lower end, a conical pressing block is arranged between the upper conical surface and the inner edge surface of the stepped hole, the inner side surface of the lower end of the conical pressing block is provided with an inner conical surface matched with the upper conical surface, and the upper end of the conical pressing block is provided with a multifunctional sleeve.

The high-speed heavy-load comprehensive performance test device in the powder metallurgy bearing, the hexagonal that upwards extends is equipped with to revolve wrong platform of multi-functional telescopic upper end.

The high-speed heavy-load comprehensive performance test device for the powder metallurgy bearing is characterized in that an annular groove is formed between an upper conical surface and a lower conical surface on the outer edge surface of the elastic locking sleeve.

Adopt technical scheme as above, the utility model discloses the superiority as follows has:

the utility model can realize the high revolution precision of 12000 rpm with stepless speed regulation and the middle and high revolution speed of 12000 rpm, and provide accurate and stable dynamic balance load by respectively arranging the middle and high speed driving shaft, the high rigidity testing shaft mechanism and the automatic loading mechanism on the damping bottom plate; a self-adaptive card installing form is provided, and a load force is accurately given; the stable test environment is a stable test environment which is stable and free of vibration interference and fully simulates the use environment of the bearing; high repeatability, high accuracy, long-life, self-cooling, easy operation, easy lubrication etc, the utility model has the characteristics of simple structure, convenient to use etc, be fit for on a large scale popularization and application.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of an automatic loading mechanism of the present invention;

FIG. 3 is a schematic structural view of the middle, high speed and heavy load adaptive clamp of the present invention;

in the figure: 1. an automatic loading mechanism; 1-1, an electric cylinder; 1-2, a portal frame; 1-3, a one-way buffer; 1-4, a force sensor; 1-5, a ball connector; 1-6, double-point load frame; 1-7, fixing a pin shaft; 1-8, spherical load column; 2. a medium-high speed drive shaft; 3. a medium-high speed coupler; 4. a medium-high speed heavy-load self-adaptive clamp; 4-1, fixing a base; 4-2, a tapered lock sleeve; 4-3, an elastic locking sleeve; 4-4, a bearing; 4-5, conical pressing blocks; 4-6, a multifunctional sleeve; 4-7, fixing holes; 4-8, positioning blocks; 4-9, positioning grooves; 5. a high rigidity test shaft mechanism; 6. a temperature sensor; 7. shock-absorbing bottom plate.

Detailed Description

The present invention will be explained in more detail by the following examples, which are not intended to limit the scope of the invention;

it should be noted that the directions and positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. used in describing the structure of the present invention are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

The device for testing the comprehensive performance of the high-speed and heavy-load in the powder metallurgy bearing comprises an automatic loading mechanism 1, a medium-high speed driving shaft 2, a medium-high speed heavy-load self-adaptive clamp 4, a high-rigidity testing shaft mechanism 5 and a damping bottom plate 7, wherein the damping bottom plate 7 is arranged on a horizontal base plate, a middle-high speed driving shaft 2 is arranged on the left side above the damping bottom plate 7, and in the concrete implementation, the rotating speed of the middle-high speed driving shaft 2 is 12000 r/min, a high rigidity testing shaft mechanism 5 is arranged on the right side of the middle and high speed driving shaft 2 at intervals, a power output shaft of the middle and high speed driving shaft 2 is connected with a power input shaft of the high rigidity testing shaft mechanism 5 through a middle and high speed coupling 3, when the concrete implementation is carried out, since the medium-high speed driving shaft 2 and the high rigidity testing shaft mechanism 5 are conventional structures in the field, detailed description of specific structures thereof is not given; further, an automatic loading mechanism 1 is arranged on the right side of the high-rigidity testing shaft mechanism 5 at intervals, the automatic loading mechanism 1 comprises an electric cylinder 1-1, a portal frame 1-2, a one-way buffer 1-3, a force sensor 1-4, a spherical connector 1-5, a double-point load frame 1-6 and a medium-high-speed heavy-load self-adaptive fixture 4, the electric cylinder 1-1 is arranged on the portal frame 1-2, a main shaft of the electric cylinder 1-1 is connected with the one-way buffer 1-3, the lower end of the one-way buffer 1-3 is connected with the force sensor 1-4, the lower end of the force sensor 1-4 is connected with the spherical connector 1-5, the lower end of the spherical connector 1-5 corresponds to the upper end face of the double-point load frame 1-6, the double-point load frame 1-6 is fixed on the lower portion of the portal frame 1-2 through a fixed, at least two spherical load columns 1-8 are arranged at the bottom of the inner frame of the double-point load frame 1-6 at intervals, a middle-high speed heavy-load self-adaptive clamp 4 is arranged in the inner frame of the double-point load frame 1-6, and the lower surface of the middle-high speed heavy-load self-adaptive clamp 4 is in contact with the upper end surfaces of the spherical load columns 1-8. A temperature sensor 6 is arranged below the medium-high speed heavy-load self-adaptive clamp 4; the one-way buffer 1-3 is a semi-rigid one-way buffer; the double-point load frames 1-6 are adjustable double-point load frames; further, a middle-high speed heavy-load self-adaptive clamp 4 is arranged at the lower part of the automatic loading mechanism 1, the middle-high speed heavy-load self-adaptive clamp 4 comprises a fixed base 4-1, a conical lock sleeve 4-2, an elastic lock sleeve 4-3, a conical press block 4-5 and a multifunctional sleeve 4-6, at least one fixed hole 4-7 penetrating to the lower surface of the fixed base 4-1 is arranged on the fixed base 4-1, the fixed base 4-1 is arranged on a horizontal base plate, a conical lock sleeve mounting hole which is concave downwards is arranged in the middle of the fixed base 4-1, at least two positioning grooves 4-9 are arranged on the inner edge surface of the conical lock sleeve mounting hole, the conical lock sleeve 4-2 is arranged in the conical lock sleeve mounting hole, at least two grooves corresponding to the positioning grooves 4-9 are arranged on the outer edge surface of the conical lock sleeve 4-2, a positioning block 4-8 is arranged in the positioning groove 4-9 and the groove, a stepped hole with a large upper end and a small lower end is arranged in the middle of the conical lock sleeve 4-2, a tapered hole with a larger upper end opening and a smaller lower end opening is arranged on the inner edge surface of the lower end of the stepped hole, an elastic locking sleeve 4-3 is arranged in the tapered hole, the middle part of the elastic locking sleeve 4-3 is provided with a bearing 4-4, the lower part of the outer edge surface of the elastic locking sleeve 4-3 is provided with a lower conical surface with a small lower end and a large upper end, the upper part of the outer edge surface of the elastic locking sleeve 4-3 is provided with an upper conical surface with a small upper end and a large lower end, a conical pressing block 4-5 is arranged between the upper conical surface and the inner edge surface of the stepped hole, the inner side surface of the lower end of the conical pressing block 4-5 is provided with an inner conical surface matched with the upper conical surface, and the upper end of the conical pressing block 4-5 is provided with a multifunctional sleeve 4-6; the upper end of the multifunctional sleeve 4-6 is provided with a hexagonal screwing table extending upwards; an annular groove is formed between the upper conical surface and the lower conical surface on the outer edge surface of the elastic locking sleeve 4-3; the inner ring of a bearing 4-4 arranged in the middle-high speed heavy-load self-adaptive fixture 4 is sleeved on a test shaft, and the left end of the test shaft is connected with a power output shaft at the right end of a high-rigidity test shaft mechanism 5 to form the powder metallurgy bearing middle-high speed heavy-load comprehensive performance test device.

The utility model discloses when concrete implementation, adorn unable adjustment base 4-1 on firm horizontal basis, the toper lock sleeve 4-2 is aimed at locating piece 4-8 and is packed into the toper lock sleeve mounting hole on unable adjustment base 4-1 and pastes really, then packs into elasticity lock sleeve 4-3 in proper order, bearing 4-4, toper briquetting 4-5, to toper briquetting 4-5 pretension, adjust bearing 4-4's axial position, pack into multi-functional sleeve 4-6, according to "material size torquemeter" selected torque value, the utilization can decide torque wrench and lock, realizes deciding the clamp force and give.

Bearing to heavy load environment use, when testing on the high-speed heavy load comprehensive properties testing machine in the powder metallurgy bearing, use the utility model discloses, can adapt to the bearing in the poor within range of 0.5mm diameter fast to can stably reduce dress card back bearing internal force change loose the difference, satisfy tester counter shaft and bearing fit clearance's fine setting simultaneously, establish more ideal test condition. Meanwhile, the size of the elastic locking sleeve 3 is adjusted, so that the bearings in a plurality of diameter ranges can be adapted, and the testing efficiency and the testing repeatability are improved.

Well high-speed heavy load self-adaptation fixture 4 is applicable to various columniform or other equant column objects (like triangle, square, pentagon, hexagonal etc.) simultaneously and presss from both sides tightly, for example need install fast the pentagon cylinder of card in a certain process of drilling machine, utilizes the utility model discloses can find the machined part center of treating by high repeatability to can provide reliable and stable clamp force, and realize installing fast the card etc..

The utility model discloses well automatic loading mechanism 1 can provide steady load regularly and quantitatively according to the automatic execution load demand of program setting. The utility model discloses can fully adapt to the start-up that appears in the powder metallurgy bearing heavy load environmental test and deflect, move states such as high-frequency vibration, axial displacement, alternating load, can accomplish the load demand of load, avoid human error, reduce the human cost, improve test repeatability.

The automatic loading mechanism 1 is simultaneously suitable for various tensile force load demand environments, can provide a dynamic and stable one-way load value, and effectively guarantees the parameter demands of force such as magnitude, direction, fluctuation and the like.

It should be noted that the applicant of the middle and high speed heavy load adaptive clamp 4 and automatic loading mechanism 1 related to the present invention has already filed additional patent applications, and the patent names are a heavy load adaptive clamp for powder metallurgy bearing and a heavy load automatic loading device for powder metallurgy bearing, respectively, and therefore, the specific structure thereof will not be described herein.

The utility model discloses when concrete implementation, at first the concentricity of high speed drive axle 2 and high rigidity test axle mechanism 5, locking screw in the calibration. After the test bearing 4-4 is installed, the temperature sensor 6 is inserted into the temperature measuring hole and directly contacts the test bearing 4-4, the temperature sensor 6 is connected to the control cabinet through a wire, the control cabinet is connected to the power supply, test parameters are set, a load is given according to experiment requirements, and the test is started. After the test is finished, extracting temperature change data, and importing the data into analysis software until a complete set of data report (temperature, speed, load, time, load direction, clearance, vibration, material and the like) is provided.

The utility model provides a high revolution precision 12000 rpm middle and high revolution speed which can realize stepless speed regulation; providing accurate and stable dynamic balance load; a self-adaptive card installing form is provided, and a load force is accurately given; the stable test environment is a stable test environment which is stable and free of vibration interference and fully simulates the use environment of the bearing; high repeatability, high precision, long service life, self-cooling, easy operation, easy lubrication, etc.

When the bearing used in the medium-high speed heavy-load environment is tested on a high-speed heavy-load comprehensive performance testing machine in a powder metallurgy bearing, the utility model can be used for quickly adapting to the bearing within the diameter difference range of +/-0.5 mm, stably providing the required rotating speed, randomly setting within the large rotating speed range, providing stable and dynamic accurate load and fully avoiding the influence of system vibration; by the control system, the test of variable conditions such as load, rotating speed, time and the like can be completed.

The part of the utility model not detailed is prior art.

The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and invention.

Claims

1. The utility model provides a high speed heavy load comprehensive properties test device in powder metallurgy bearing, includes automatic loading mechanism (1), well high speed drive axle (2), well high speed heavy load self-adaptation fixture (4), high rigidity test axle mechanism (5) and vibration damping mount (7), characterized by: a middle-high speed driving shaft (2) is arranged on the left side of the upper surface of the damping bottom plate (7), a high-rigidity testing shaft mechanism (5) is arranged on the right side of the middle-high speed driving shaft (2) at intervals, the power output shaft of the medium-high speed driving shaft (2) is connected with the power input shaft of the high-rigidity testing shaft mechanism (5) through a medium-high speed coupler (3), the right side of the high-rigidity testing shaft mechanism (5) is provided with automatic loading mechanisms (1) at intervals, the lower part of the automatic loading mechanism (1) is provided with a medium-high speed heavy-load self-adaptive clamp (4), a bearing (4-4) is arranged in the middle-high speed heavy-load self-adaptive clamp (4), the inner ring of the bearing (4-4) is sleeved on the test shaft, the left end of the test shaft is connected with a power output shaft at the right end of the high-rigidity test shaft mechanism (5) to form the high-speed and heavy-load comprehensive performance test device in the powder metallurgy bearing.

2. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 1, is characterized in that: the damping bottom plate (7) is arranged on the horizontal base plate.

3. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 1, is characterized in that: the rotating speed of the medium-high speed driving shaft (2) is 12000 r/min.

4. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 1, is characterized in that: the automatic loading mechanism (1) comprises an electric cylinder (1-1), a portal frame (1-2), a one-way buffer (1-3), a force sensor (1-4), a spherical connector (1-5), a double-point load frame (1-6) and a medium-high-speed heavy-load self-adaptive fixture (4), the electric cylinder (1-1) is arranged on the portal frame (1-2), the one-way buffer (1-3) is connected with a main shaft of the electric cylinder (1-1), the force sensor (1-4) is connected with the lower end of the one-way buffer (1-3), the spherical connector (1-5) is connected with the lower end of the force sensor (1-4), the lower end of the spherical connector (1-5) corresponds to the upper end face of the load double-point frame (1-6), and the load double-point frame (1-6) is fixed on the portal frame (1-7) through a fixing pin shaft (1-7) At least two spherical load columns (1-8) are arranged at the bottom of the inner frame of the double-point load frame (1-6) at intervals, a middle-high speed heavy-load self-adaptive clamp (4) is arranged in the inner frame of the double-point load frame (1-6), and the lower surface of the middle-high speed heavy-load self-adaptive clamp (4) is in contact with the upper end surfaces of the spherical load columns (1-8).

5. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 4, is characterized in that: and a temperature sensor (6) is arranged below the middle-high speed heavy-load self-adaptive clamp (4).

6. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 4, is characterized in that: the one-way buffer (1-3) is a semi-rigid one-way buffer.

7. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 4, is characterized in that: the double-point load frame (1-6) is an adjustable double-point load frame.

8. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 1, is characterized in that: the middle-high speed heavy-load self-adaptive clamp (4) comprises a fixed base (4-1), a conical lock sleeve (4-2), an elastic lock sleeve (4-3), a conical pressing block (4-5) and a multifunctional sleeve (4-6), wherein the fixed base (4-1) is arranged on a horizontal base plate, a conical lock sleeve mounting hole which is downwards recessed is arranged in the middle of the fixed base (4-1), at least two positioning grooves (4-9) are arranged on the inner edge surface of the conical lock sleeve mounting hole, the conical lock sleeve (4-2) is arranged in the conical lock sleeve mounting hole, at least two grooves corresponding to the positioning grooves (4-9) are arranged on the outer edge surface of the conical lock sleeve (4-2), positioning blocks (4-8) are arranged in the positioning grooves (4-9) and the grooves, a stepped hole with a large upper end and a small lower end is arranged in the middle of the conical lock sleeve (4-2), the inner edge face of the lower end of the stepped hole is provided with a tapered hole with a large opening at the upper end and a small opening at the lower end, an elastic locking sleeve (4-3) is arranged in the tapered hole, the middle of the elastic locking sleeve (4-3) is provided with a bearing (4-4), the lower part of the outer edge face of the elastic locking sleeve (4-3) is provided with a lower tapered face with a small lower end and a large upper end, the upper part of the outer edge face of the elastic locking sleeve (4-3) is provided with an upper tapered face with a small upper end and a large lower end, a tapered pressing block (4-5) is arranged between the upper tapered face and the inner edge face of the stepped hole, the inner side face of the lower end of the tapered pressing block (4-5) is provided with an inner tapered face matched with the upper tapered.

9. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 8, is characterized in that: the upper end of the multifunctional sleeve (4-6) is provided with a hexagonal screwing table extending upwards.

10. The device for testing the high-speed and heavy-load comprehensive performance of the powder metallurgy bearing, according to claim 8, is characterized in that: an annular groove is arranged between the upper conical surface and the lower conical surface on the outer edge surface of the elastic locking sleeve (4-3).