CN217359003U

CN217359003U - Performance testing device suitable for self-lubricating bearing

Info

Publication number: CN217359003U
Application number: CN202221205816.4U
Authority: CN
Inventors: 吴帅; 王正文; 张少波; 薄伟; 宫立栋; 陈俊成; 童力; 张西
Original assignee: Neway Oil Equipment Suzhou Co ltd
Current assignee: Neway Oil Equipment Suzhou Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-09-02
Anticipated expiration: 2032-05-18

Abstract

The utility model discloses a capability test device suitable for self-lubricating bearing, including mechanism and actuating mechanism of exerting pressure, actuating mechanism include the backup pad, with the backup pad rotates the drive shaft of connection and is used for the drive shaft is established along its axial lead pivoted first drive assembly, and the bearing housing that awaits measuring is established outside the drive shaft, the mechanism of exerting pressure is established including the cover bearing housing outside the bearing that awaits measuring and being used for the drive the second drive assembly that the bearing housing removed, first step portion has on the outer wall of drive shaft, second step portion has on the inner wall of bearing housing, the bearing that awaits measuring holds along its axis direction between first step portion and the second step portion. The utility model discloses a capability test device suitable for self-lubricating bearing can simulate the atress condition of bearing when the valve bears single flow to pressure, can realize at least the test to bearing capacity, frictional behavior and the life-span of the bearing that awaits measuring.

Description

Performance testing device suitable for self-lubricating bearing

Technical Field

The utility model relates to a valve and bearing test technical field, concretely relates to capability test device suitable for self-lubricating bearing on valve.

Background

With the continuous development of the valve industry, many valve companies begin to simplify the flow from inside, reduce the cost of the valve, and move the valve toward a standardized and standardized design, thereby requiring that the bearings on the valve also be more standardized and specialized. Self-lubricating bearings on valves are typically composed of a metal ring and an internal lubricating coating, and thus there are many coating manufacturing processes, such as powder sintering, braid bonding, polymeric tape bonding, and the like. At home and abroad, a plurality of suppliers for producing sliding bearings generally have similar performances such as load, friction coefficient, service life and the like, do not accord with data under the specific use condition of the valve, and are not beneficial to valve manufacturers to select by using different processes. However, in the prior art, a bearing testing device which can be suitable for self-lubricating bearings with different specifications to carry out various tests is not provided.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to overcome the defects of the prior art, the present invention provides a performance testing device for a self-lubricating bearing, which can test the performance of the self-lubricating bearing.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a capability test device suitable for self-lubricating bearing, is including applying pressure mechanism and actuating mechanism, actuating mechanism include the backup pad, with the backup pad rotates the drive shaft of connecting and is used for the drive shaft is followed its axial lead pivoted first drive assembly, and the bearing housing that awaits measuring is established outside the drive shaft, applying pressure mechanism establishes including the cover bearing housing outside the bearing that awaits measuring and being used for the drive the second drive assembly that the bearing housing removed, first step portion has on the outer wall of drive shaft, second step portion has on the inner wall of bearing housing, the bearing that awaits measuring holds along its axial direction between first step portion and the second step portion. The self-lubricating bearing is also called a steel back bearing, and the structure of the self-lubricating bearing comprises a metal ring and a lubricating coating (generally 20-30 mu m) covering the inner wall of the metal ring.

According to some preferred aspects of the present invention, the height of the first stepped portion is smaller than the thickness of the bearing to be measured; and/or the thickness of the second step part is smaller than that of the bearing to be measured. To accommodate the bearing to be tested between the bearing housing and the drive shaft.

According to some preferred implementation aspects of the present invention, the outer wall of the bearing to be measured and the inner wall of the bearing housing are in interference fit. So that the bearing to be measured and the bearing sleeve move integrally, and the bearing to be measured and the bearing sleeve do not move relatively.

According to some preferred implementation aspects of the utility model, the inner wall of bearing that awaits measuring with be clearance fit between the outer wall of drive shaft to the rotation through the drive shaft is tested the bearing that awaits measuring.

According to some preferred implementation aspects of the present invention, the support plate includes a first bearing plate and a second bearing plate which are oppositely disposed, the first bearing plate and the second bearing plate are respectively provided with a rolling bearing, the first end of the driving shaft is accommodated in one of the rolling bearings, and the second end of the driving shaft passes through the other rolling bearing and then is connected to the first driving assembly.

According to some preferred aspects of the invention, the second end key is connected to an adapter sleeve, the adapter sleeve being connected to the first drive assembly. The driving assembly is fixedly connected with the adapter sleeve, and then the driving shaft is driven to rotate.

According to some preferred implementation aspects of the present invention, the second driving assembly includes a bracket, a piston cylinder disposed on the bracket, a piston disposed in the piston cylinder, and a piston rod connected between the piston and the bearing housing, wherein the two ends of the piston rod are connected with the piston and the bearing housing by screw threads.

According to some preferred implementation aspects of the utility model, the support corresponds the piston cylinder is seted up and is run through the connector of support thickness direction, the connector is used for being connected with the high pressure source in order to drive the piston removes in the piston cylinder. The piston moves in the piston cylinder, drives the piston rod to move, further pushes the bearing sleeve to move, and tests under different conditions are realized by controlling the pressure between the bearing to be tested and the driving shaft.

According to some preferred implementation aspects of the present invention, including the bottom plate, the support plate and the bracket are both disposed on the bottom plate and are disposed perpendicular to the bottom plate.

According to some preferred implementation aspects of the present invention, an upright plate is disposed at one end of the bottom plate close to the driving mechanism, and a plane where the upright plate is disposed is perpendicular to a plane where the bottom plate is disposed. The setting of riser can make the bottom plate erect, and then can place the bearing that awaits measuring under cold or hot temperature environment, realizes the test under the high low temperature.

Owing to adopted above technical scheme, compare in prior art, the utility model discloses a capability test device suitable for self-lubricating bearing through set up the drive shaft in the bearing that awaits measuring, set up the bearing housing outside the bearing that awaits measuring to exert pressure between bearing and the drive shaft to await measuring through the mechanism of exerting pressure, can simulate the valve and bear the single current to the atress condition of bearing when pressure, can realize the test to bearing capacity, frictional behavior and the life-span of bearing that awaits measuring at least.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.

Fig. 1 is a perspective view of a performance testing apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a side view of a performance testing apparatus according to a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a schematic diagram of the cooperation between the bearing to be tested and the driving shaft and the bearing sleeve in the performance testing apparatus according to the preferred embodiment of the present invention;

in the drawings: 1. the bearing comprises a first bearing plate, a cover plate, a driving shaft, a first guide belt, a piston cylinder, a GREEN ring, a bearing sleeve, a rolling bearing, a key 15, a key 16, an adapter sleeve, a flange 17, a bearing to be tested, a bottom plate 19, a pin 20, a vertical plate 21, a vertical plate 22, a connecting port 23, a driving mechanism 24, a pressing mechanism 25, a first step part 26 and a second step part 26.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the performance testing apparatus for a self-lubricating bearing of the present embodiment includes a base plate 19, a pressing mechanism 24 and a driving mechanism 23, which are provided on the base plate 19. The self-lubricating bearing is also called a steel back bearing, and the structure of the self-lubricating bearing comprises a metal ring and a lubricating coating (generally 20-30 mu m) covering the inner wall of the metal ring.

The driving mechanism 23 comprises a supporting plate, a driving shaft 3 rotatably connected with the supporting plate and a first driving component for driving the driving shaft 3 to rotate along the axial lead of the driving shaft, and the bearing to be measured 18 is sleeved outside the driving shaft 3. The support plate comprises a first bearing plate 1 and a second bearing plate 12 arranged opposite to each other, and a cover plate 2 is mounted on the first bearing plate 1 to prevent dust from entering. The outer wall of the drive shaft 3 may be coated or not according to the actual measurement requirements, for example, in order to shorten the test period, a corresponding functional coating may be added on the outer wall of the drive shaft 3.

The first bearing plate 1 and the second bearing plate 12 are provided with rolling bearings 14, a first end of the drive shaft 3 is accommodated on one of the rolling bearings 14, and a second end of the drive shaft 3 passes through the other rolling bearing 14 and then is connected with the first drive assembly. Since the friction coefficient of the rolling bearing 14 is much smaller than that of the sliding bearing, the friction influence is negligible, and simultaneously, the centering performance and the stability of the driving shaft 3 and the bearing 18 to be measured during the rotation are favorably ensured. The second end is connected to an adaptor sleeve 16 by a key 15, the adaptor sleeve 16 being connected to the first drive assembly. The driving assembly is fixedly connected with the adapter sleeve 16, so as to drive the driving shaft 3 to rotate. The drive shaft 3 and bearing housing 13 may be dimensioned as required to fit the required test specification of the bearing. In this embodiment, one end of a flange 17 is connected to the second bearing plate 12, the driving shaft 3 is connected to the adapter sleeve 16 through the double key 15, the adapter sleeve 16 is connected to the torque sensor, and then connected to the life tester and fixedly connected to the other end of the flange 17. The service life tester can circularly and repeatedly rotate according to a set rotation angle, such as plus 90 degrees to minus 90 degrees.

The pressure applying mechanism 24 comprises a bearing sleeve 13 sleeved outside the bearing 18 to be tested and a second driving component for driving the bearing sleeve 13 to move. The second driving assembly comprises a support 10, a piston cylinder 5 arranged on the support 10, a piston 8 arranged in the piston cylinder 5 and a piston rod 11 connected between the piston 8 and a bearing sleeve 13, wherein two ends of the piston rod 11 are respectively in threaded connection with the piston 8 and the bearing sleeve 13. The bearing plate and the bracket 10 are both arranged on the bottom plate 19 and are arranged perpendicular to the bottom plate 19. In this embodiment, a first guide belt 4 with the same specification is respectively designed between the piston rod 11 and the bearing sleeve 13 to ensure the centering performance of the piston 8 and the piston rod 11 during movement. The piston cylinder 5 is connected with the bracket 10 in a positioning way through a screw and a pin 20, the O-shaped ring 7 is used for sealing between the piston cylinder and the bracket, and two Gray rings 6 and two second guide belts 9 are respectively adopted on the piston 8, so that the piston 8 has good dynamic sealing effect when being driven.

The support 10 is provided with a connecting port 22 penetrating through the thickness direction of the support 10 corresponding to the piston cylinder 5, and the connecting port 22 is used for being connected with a high pressure source (air pressure or hydraulic pressure) to drive the piston 8 to move in the piston cylinder 5. The piston 8 moves in the piston cylinder 5 to drive the piston rod 11 to move, so that the bearing sleeve 13 is pushed to move, the pressure between the bearing 18 to be tested and the driving shaft 3 is controlled, and tests under different conditions are realized. The magnitude of the pressure value to be applied in the piston cylinder 5 when the load required by the bearing 18 to be measured is generated can be determined through force calculation.

The outer wall of the drive shaft 3 has a first step 25 thereon, the inner wall of the bearing housing 13 has a second step 26 thereon, and the bearing 18 to be tested is accommodated between the first step 25 and the second step 26 in the axial direction thereof to define the position of the bearing 18 to be tested. The heights of the first step portion 25 and the second step portion 26 are smaller than the thickness of the bearing to be tested 18 to accommodate the bearing to be tested 18 between the bearing housing 13 and the drive shaft 3. And the outer wall of the bearing 18 to be tested is in interference fit (tight fit) with the inner wall of the bearing sleeve 13, and the inner wall of the bearing 18 to be tested is in clearance fit with the outer wall of the driving shaft 3, so that the bearing 18 to be tested is tested through the rotation of the driving shaft 3. The bearing 18 to be tested and the bearing sleeve 13 move integrally, the bearing 18 to be tested and the bearing sleeve 13 do not move relatively, the pressure between the bearing 18 to be tested and the driving shaft 3 can be controlled by matching the movement of the bearing sleeve 13 with the pressure value to be applied in the piston cylinder 5, and the test of the bearing 18 to be tested under different surface pressures is realized. Namely, the bearing sleeve 13 and the bearing 18 to be measured are tightly matched in inner diameter and do not rotate, the driving shaft 3 and the bearing 18 to be measured are loosely matched, and the bearing 18 to be measured is taken out from one end of the bearing sleeve slowly.

An upright plate 21 is arranged at one end of the bottom plate 19 close to the driving mechanism 23, and the plane of the upright plate 21 is perpendicular to the plane of the bottom plate 19. The arrangement of the vertical plate 21 can enable the bottom plate 19 to be vertical, so that the bearing 18 to be tested can be placed in a cold or hot temperature environment, and the test under high and low temperatures can be realized. For example, one side of the bearing 18 to be measured can be integrally placed in a high-temperature box, the upper side is outside, and the moving length of the piston rod 11 is calculated by heat conduction to be designed into a proper size so as to avoid the influence of heat transfer at the piston cylinder 5. Therefore, the device can be used for testing the performances of the friction coefficient, the service life and the like of the bearing at high temperature.

The assembly process of the performance testing device suitable for the self-lubricating bearing in the embodiment is briefly described as follows:

1. firstly, the bottom plate 19 is flatly placed on the ground, then the second bearing plate 12 is installed on the limiting groove of the bottom plate 19 and fixed through the pin 20 and the screw, then the installation flange 17 is connected on the second bearing plate 12 through the screw, and then the rolling bearing 14 is installed.

2. Next, the bracket 10 is aligned and fixed to one end of the base plate 19 by the pin 20 and the screw.

3. After two GREEN rings 6 and two second guide belts 9 are arranged on a piston 8, the assembly is arranged in a piston cylinder 5 according to the inward direction of the thread end, and then an O-shaped ring 7 is arranged on the piston cylinder 5 and is integrally arranged on a bracket 10 through a limiting groove.

4. The first guide belt 4 is then inserted into the piston cylinder 5, and the threaded end of the piston rod 11 is screwed onto the piston 8, the piston rod 11 being held in a horizontal position by a strap or support.

5. The outer diameter of the bearing 18 to be tested and the shaft hole of the bearing sleeve 13 are in interference fit, the bearing 18 to be tested needs to be slowly and flatly installed into the bearing sleeve 13 under the assistance of a nylon tool, and then the first guide belt 4 is installed on the bearing sleeve 13.

6. Then, the assembled bearing sleeve 13 is installed on the piston rod 11, the piston rod is kept in a horizontal state, the first bearing plate 1 is installed through the limiting groove of the bottom plate 19 and fixed through the pin 20 and the screw, the driving shaft 3, the rolling bearing 14 and the cover plate 2 are sequentially installed, and the cover plate 2 and the first bearing plate 1 are fixed through the limiting groove and the screw.

7. And finally, connecting the other end of the driving shaft 3 with an adapter sleeve 16 by a double key 15, connecting the adapter sleeve 16 with a torque sensor and a service life tester, and fixedly connecting the service life tester with one end of a flange plate 17.

The following briefly describes a test procedure of the performance test apparatus for a self-lubricating bearing in this embodiment:

the performance testing device suitable for the self-lubricating bearing in the embodiment can be used for simulating the performance test of the valve bearing under normal temperature and high temperature working conditions, and the high temperature test can be carried out only by vertically placing the device. Through testing, bearings of different brands, different processes and different specifications can be classified and compared respectively, and accordingly optimized selection is obtained. The test procedure at ambient temperature is described below:

1. and (3) carrying capacity testing:

firstly, according to the bearing surface pressure (such as 100MPa, 200MPa and 300MPa) to be tested, the corresponding pressure value in the piston cylinder 5 is calculated through mechanical analysis, the connector 22 of the bracket 10 is connected with air pressure or hydraulic pressure to apply given pressure to the piston cylinder 5, and the pressure value is transmitted to the bearing 18 to be tested through the piston 8, the piston rod 11 and the bearing sleeve 13 in sequence, so that the stress condition of the bearing when the valve bears single-flow-direction pressure is simulated. Then, a certain rotating speed is set through the service life tester to drive the driving shaft 3 to rotate, the state of the switch is simulated when the valve bears pressure, and the real-time torque of the bearing 18 to be tested under the condition of bearing different surface pressures can be recorded through the torque sensor. When the real-time torque changes suddenly under a certain surface pressure condition, the bearing limit of the bearing is indicated, so that the bearing capacities of different bearings can be tested.

2. And (3) testing the friction performance:

the service life tester is set to a certain rotating speed, and meanwhile, a certain surface pressure load is applied to the bearing 18 to be tested through air pressure or hydraulic pressure, so that real-time torques under different rotation turns (such as 100 times and 200 times) can be displayed on the torque sensor. Therefore, the actual friction coefficient of the tested bearing under different turns can be calculated according to the relation between the torque T and the friction coefficient mu, and the friction coefficients of the tested bearing under different surface pressures (the same turns) or the same surface pressure (different turns) can be compared after the bearings of different brands are tested.

Torque T versus coefficient of friction μ:

or

Wherein F is the radial force borne by the bearing, P is the test surface pressure, h is the bearing height, and d is the bearing inner diameter.

3. And (3) testing the service life:

the testing arrangement dismouting in this embodiment is comparatively convenient, takes out apron 2, first bearing plate 1, antifriction bearing 14, drive shaft 3 through disassembling earlier and takes off bearing housing 13 after, then takes out bearing 18 that awaits measuring through nylon frock assistance slowly parallel and level. Wear of the surface of the bearing 18 to be tested can be seen after disassembly. For example, after the service life tests are carried out for 100 times, 200 times and the like, the bearing can be conveniently taken out to observe the abrasion condition of the bearing by dismounting the screw. The service life performance difference of different brands of bearings can be compared after the bearings are tested.

The utility model discloses a capability test device suitable for self-lubricating bearing through set up the drive shaft in the bearing that awaits measuring, set up the bearing housing outside the bearing that awaits measuring to exert pressure between bearing and the drive shaft through the mechanism of exerting pressure, can be used for testing the difference of the different brand bearings or different technology bearings bearing under the simulation valve operating condition performance such as bearing, friction, life-span, the performance characteristics of the different article class bearings of contrastive analysis of being convenient for help obtaining the selection of optimization.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a capability test device suitable for self-lubricating bearing which characterized in that: including applying pressure mechanism and actuating mechanism, actuating mechanism include the backup pad, with the backup pad rotates the drive shaft of connecting and is used for the drive shaft is along its axial lead pivoted first drive assembly, and the bearing housing that awaits measuring is established outside the drive shaft, applying pressure mechanism establishes including the cover the outer bearing housing of bearing that awaits measuring and being used for the drive the second drive assembly that the bearing housing removed, first step portion has on the outer wall of drive shaft, second step portion has on the inner wall of bearing housing, the bearing that awaits measuring holds along its axial direction between first step portion and the second step portion.

2. The performance testing apparatus of claim 1, wherein: the height of the first step part is smaller than the thickness of the bearing to be measured; and/or the thickness of the second step part is smaller than that of the bearing to be measured.

3. The performance testing apparatus of claim 2, wherein: and the outer wall of the bearing to be tested is in interference fit with the inner wall of the bearing sleeve.

4. The performance testing apparatus of claim 2, wherein: and the inner wall of the bearing to be tested is in clearance fit with the outer wall of the driving shaft.

5. The performance testing apparatus of claim 1, wherein: the backup pad includes relative first bearing plate and the second bearing plate that sets up, all be provided with antifriction bearing on first bearing plate and the second bearing plate, the first end of drive shaft holds on one of them antifriction bearing, the second end of drive shaft pass behind another antifriction bearing with first drive assembly is connected.

6. The performance testing apparatus of claim 5, wherein: the second end key is connected with a switching sleeve, and the switching sleeve is connected with the first driving assembly.

7. The performance testing apparatus of claim 5, wherein: the second driving assembly comprises a support, a piston cylinder arranged on the support, a piston arranged in the piston cylinder and a piston rod connected between the piston and the bearing sleeve, and two end parts of the piston rod are in threaded connection with the piston and the bearing sleeve.

8. The performance testing apparatus of claim 7, wherein: the support is provided with a connector penetrating through the thickness direction of the support corresponding to the piston cylinder, and the connector is used for being connected with a high-pressure source to drive the piston to move in the piston cylinder.

9. The performance testing apparatus of any one of claims 1-8, wherein: the support plate and the support are arranged on the bottom plate and are perpendicular to the bottom plate.

10. The performance testing apparatus of claim 9, wherein: the end, close to the driving mechanism, of the bottom plate is provided with a vertical plate, and the plane where the vertical plate is located is perpendicular to the plane where the bottom plate is located.