A self-lubricating material starting torque measuring device based on a half-ring test

Abstract

The application relates to a self-lubricating material starting torque measuring device based on a half-ring test, which comprises a bottom plate, a loading mechanism, a force sensor, a half-ring clamp mechanism and a starting measuring mechanism; the loading mechanism is arranged at one end of the rear side of the upper surface of the bottom plate; the inner end of the loading mechanism is connected with one side of the half-ring clamp mechanism perpendicularly through the force sensor; the starting measuring mechanism is arranged at the front side of the upper surface of the bottom plate and is correspondingly matched with the middle part of the half-ring clamp mechanism. The application can measure the starting torque of the self-lubricating material from the static state to the instant when the relative movement starts and the real-time torque of the self-lubricating material in the dynamic friction process, and further obtain the static friction coefficient and the dynamic friction coefficient of the self-lubricating material.

Description

Technical Field

[0001] This invention relates to the field of torque measurement technology, and in particular to a device for measuring the starting torque of self-lubricating materials based on a semi-ring test. Background Technology

[0002] Self-lubricating spherical plain bearings are widely used in engineering machinery, heavy-duty trucks, water conservancy facilities, and military machinery, and especially in aerospace equipment in recent years. Starting torque refers to the frictional torque that the inner and outer rings of the bearing must overcome to begin relative rotation from a stationary state. It reflects the frictional performance of the self-lubricating material and is an important technical parameter of self-lubricating spherical plain bearings. Currently, starting torque measurements are performed under no-load conditions, while self-lubricating spherical plain bearings typically operate under loaded conditions. Therefore, a test device that can accurately measure the starting frictional torque of self-lubricating materials under loaded operating conditions is of great significance for investigating the frictional performance of self-lubricating materials in spherical plain bearings. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a self-lubricating material starting torque measuring device based on a semi-ring test. This device can measure the starting torque of the self-lubricating material from a static state to the moment of relative motion during loading, as well as the real-time torque of the self-lubricating material during dynamic friction, thereby obtaining the static friction coefficient and dynamic friction coefficient of the self-lubricating material under different load conditions.

[0004] The technical solution adopted in this invention is as follows:

[0005] The present invention proposes a self-lubricating material starting torque measuring device based on a semi-ring test, comprising a base plate, a loading mechanism, a force sensor, a semi-ring clamping mechanism, and a starting measuring mechanism; the loading mechanism is disposed at one end of the rear side of the upper surface of the base plate; the inner end of the loading mechanism is perpendicularly connected to one side of the semi-ring clamping mechanism through the force sensor; the starting measuring mechanism is disposed at the front side of the upper surface of the base plate and corresponds to and cooperates with the middle part of the semi-ring clamping mechanism.

[0006] Furthermore, the loading mechanism includes a loading base, a jack, a jack cover, a loading shaft, a rigid spring, and a drive shaft bracket; the loading base is fixed to one end of the rear side of the upper surface of the base plate; the jack is horizontally fixed to the upper part of the loading base through the jack cover; the loading shaft is coaxially fixed to the inner end of the jack; the rigid spring is axially installed on the outside of the loading shaft; the drive shaft bracket is disposed on the inner side of the loading shaft and its bottom is fixed to the base plate; the inner end of the loading shaft passes axially through the upper part of the drive shaft bracket and is coaxially threaded to the force sensor; the inner end of the rigid spring abuts against the left end face of the drive shaft bracket; the inner end face of the force sensor is fixedly connected to one side of the semi-ring clamp mechanism.

[0007] Furthermore, the semi-ring clamp mechanism includes a left clamping block, a left semi-ring clamp, a right semi-ring clamp, and a right clamping block; the left and right semi-ring clamps are arranged opposite each other and have symmetrical semi-ring grooves in the middle of their opposite sides; the left side of the left semi-ring clamp is connected to the right side of the left clamping block; the left side of the left clamp is fixedly connected to a force sensor; the right side of the right semi-ring clamp is connected to the left side of the right clamping block; the bottom of the right clamp is fixedly connected to a base plate; the left clamping block, the left semi-ring clamp, the right semi-ring clamp, and the right clamping block are on the same horizontal line.

[0008] Furthermore, a horizontal guide key is provided on the upper surface of the base plate in the area below the left fixing block of the clamp and the left half-ring clamp; the bottom of the left fixing block of the clamp and the left half-ring clamp respectively cooperate with the guide key moving pair.

[0009] Furthermore, the right end face of the left fixing block of the clamp and the left end face of the right fixing block of the clamp are respectively provided with arc-shaped guide rails in a vertical direction; the left side of the semi-ring left clamp cooperates with the arc-shaped guide rail on the right end face of the left fixing block of the clamp; the right side of the semi-ring right clamp cooperates with the arc-shaped guide rail on the left end face of the right fixing block of the clamp.

[0010] Furthermore, the starting measurement mechanism includes a mandrel, a first coupling, a torque sensor, a second coupling, a reducer, and a handwheel; the reducer is mounted on the upper surface of the base plate; the torque sensor is fixedly connected to the output shaft of the reducer via the second coupling; the handwheel is mounted on the input shaft of the reducer via a key connection; one side of the mandrel is connected to the torque sensor via the first coupling, and the other side corresponds to and engages with the semi-annular grooves in the middle of the left and right semi-annular clamps.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] Compared to current measurements of starting torque, which are all performed under no-load conditions, while in reality self-lubricating spherical bearings typically operate under loaded conditions, this invention can measure the starting torque of self-lubricating materials under loaded conditions, simulating the actual working conditions of self-lubricating materials, and the measurement results are closer to reality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0015] In the attached drawings, the following reference numerals are used: 1-Loading base; 2-Jack; 3-Jack cover; 4-Hex socket head cap screw A; 5-Loading shaft; 6-Hard spring; 7-Drive shaft bracket; 8-Hex socket head cap screw B; 9-Hex socket head cap screw C; 10-Force sensor; 11-Left clamping block; 12-Left half-ring clamp; 13-Right half-ring clamp; 14-Right clamping block; 15-Hex socket head cap screw D; 16-Mandrel; 17-First coupling; 18-Torque sensor; 19-Second coupling; 20-Reducer; 21-Hex socket head cap screw E; 22-Handwheel; 23-Guide key; 24-Hex socket head cap screw F; 25-Arc-shaped guide rail; 26-Base plate. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] It should be noted that in the description of this invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not mean that the device or element must have a specific orientation, or be constructed and operated in a specific orientation.

[0018] See appendix Figure 1 and 2 This paper presents a specific structure of an embodiment of a self-lubricating material starting torque measuring device based on a semi-ring test proposed in this invention. The device includes a base plate 26, a loading mechanism, a force sensor 10, a semi-ring clamping mechanism, and a starting measuring mechanism. The loading mechanism is located at the left end of the rear side of the upper surface of the base plate 26. The inner end of the loading mechanism is vertically fixedly connected to one side of the semi-ring clamping mechanism through the force sensor 10. The starting measuring mechanism is installed on the right side of the front part of the upper surface of the base plate 26 and corresponds to and cooperates with the middle part of the semi-ring clamping mechanism.

[0019] The loading mechanism includes a loading base 1, a jack 2, a jack cover 3, a loading shaft 5, a rigid spring 6, and a drive shaft bracket 7. The loading base 1 is fixed to the left end of the rear side of the upper surface of the base plate 26. The jack 2 is horizontally fixed to the upper part of the loading base 1 by the jack cover 3. The front and rear sides of the jack cover 3 are respectively fixed to the upper part of the loading base 1 by hexagon socket head cap screws A4. The left end of the loading shaft 5 is coaxially fixed to the inner output end of the jack. The rigid spring 6 is axially mounted. The drive shaft bracket 7 is mounted on the outside of the loading shaft 5 and its bottom is fixed to the base plate 26 via a base. The two sides of the drive shaft bracket 7 are fixed to the two sides of its base via hexagon socket head cap screws B8. The right end of the loading shaft 5 passes axially through the drive shaft bracket 7 and the upper part of its base and is coaxially threaded to the force sensor 10. The right end of the rigid spring 6 abuts against the left end face of the drive shaft bracket 7 and its base. The right end face of the force sensor 10 is fixed to one side of the semi-ring clamp mechanism.

[0020] The semi-ring clamping mechanism includes a left clamping block 11, a left semi-ring clamp 12, a right semi-ring clamp 13, and a right clamping block 14. The left semi-ring clamp 12 and the right semi-ring clamp 13 are arranged opposite each other and have symmetrical semi-ring grooves in the middle of their opposite sides for assembling the semi-rings. The left side of the left semi-ring clamp 12 is connected to the right side of the left clamping block 11. The left end face of the left clamping block 11 is fixed to the force sensor 10 by a hexagonal head screw C9. The right side of the right semi-ring clamp 13 is connected to the left side of the right clamping block 14. The right clamping block 14 is fixed to the base plate 26 by a fixing seat, and the right clamping block 14 is fixed to the fixing seat by a hexagonal head screw D15. The left clamping block 11, the left semi-ring clamp 12, the right semi-ring clamp 13, and the right clamping block 14 are on the same horizontal line.

[0021] In this embodiment, a horizontal guide key 23 is fixedly installed on the upper surface of the base plate 26 in the area below the left fixing block 11 and the semi-ring left clamp 12; the bottoms of the left fixing block 11 and the semi-ring left clamp 12 respectively cooperate with the guide key 23 sliding pair; the guide key 23 is fixed to the upper surface of the base plate 26 by an internal hexagonal head screw F24 to ensure that the left fixing block 11, the left semi-ring clamp 12, the right semi-ring clamp 13, and the right fixing block 14 are always on the same horizontal line. The right end face of the left fixing block 11 of the clamp and the left end face of the right fixing block 14 of the clamp are respectively provided with arc-shaped guide rails 25 vertically; the left side of the semi-ring left clamp 12 cooperates with the arc-shaped guide rail 25 on the right end face of the left fixing block 11 of the clamp; the right side of the semi-ring right clamp 13 cooperates with the arc-shaped guide rail 25 on the left end face of the right fixing block 14 of the clamp; during the loading process, the distance between the semi-ring left clamp 12 and the semi-ring right clamp 13 gradually decreases, and at the same time, the arc-shaped guide rails 25 make the semi-ring left clamp 12 and the semi-ring right clamp 13 finely adjusted during loading to ensure that the two are on the same horizontal plane, and finally the semi-ring is tightly held by the mandrel 16, so that the load is applied to the friction surface formed by the self-lubricating material on the surface of the semi-ring and the mandrel 16.

[0022] The starting measurement mechanism includes a spindle 16, a first coupling 17, a torque sensor 18, a second coupling 19, a reducer 20, and a handwheel 22. The reducer 20 is mounted on the front right side of the upper surface of the base plate 26 by an internal hexagon head screw E21. The torque sensor 18 is fixed to the output shaft of the reducer 20 by the second coupling 19. The handwheel 22 is mounted on the input shaft of the reducer 20 by a key connection. One side of the spindle 16 is connected to the torque sensor 18 by the first coupling 17 to obtain a stable torque, and the other side is correspondingly engaged with the semi-annular grooves in the middle of the semi-annular left clamp 12 and the semi-annular right clamp 13.

[0023] The operation process of this invention is as follows:

[0024] The jack 2 applies a load to push the loading shaft 5, force sensor 10, left clamping block 11, and left half-ring clamp 12 to the right, reducing the distance between the left half-ring clamp 12 and the right half-ring clamp 13, allowing the half-ring to grip the mandrel 16 tightly. This causes the load to act on the friction surface formed between the self-lubricating material on the half-ring surface and the mandrel 16. The force sensor 10 measures the load applied by the jack 2 in real time. The handwheel 22 is cranked, and the reducer 20 outputs a stable rotation, causing the mandrel 16 to rotate at a uniform speed. The torque sensor 18 measures the starting torque of the self-lubricating material from a static state to the moment it begins relative motion and the real-time torque of the self-lubricating material during dynamic friction.

[0025] All matters not covered in this invention are common knowledge.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for measuring the starting torque of self-lubricating materials based on a semi-ring test, characterized in that: The device includes a base plate, a loading mechanism, a force sensor, a semi-ring clamping mechanism, and a starting measurement mechanism; the loading mechanism is located at one end of the rear side of the upper surface of the base plate; the inner end of the loading mechanism is perpendicularly connected to one side of the semi-ring clamping mechanism through the force sensor; the starting measurement mechanism is located at the front side of the upper surface of the base plate and corresponds to and cooperates with the middle part of the semi-ring clamping mechanism. The semi-ring clamp mechanism includes a left clamping block, a left semi-ring clamp, a right semi-ring clamp, and a right clamping block; the left and right semi-ring clamps are arranged opposite each other and have symmetrical semi-ring grooves in the middle of their opposite sides; the left side of the left semi-ring clamp is connected to the right side of the left clamping block; the left side of the left clamp is fixedly connected to a force sensor; the right side of the right semi-ring clamp is connected to the left side of the right clamping block; the bottom of the right clamp is fixedly connected to a base plate; the left clamping block, the left semi-ring clamp, the right semi-ring clamp, and the right clamping block are all on the same horizontal line. The right end face of the left fixing block of the clamp and the left end face of the right fixing block of the clamp are respectively provided with arc-shaped guide rails vertically; the left side of the semi-ring left clamp cooperates with the arc-shaped guide rail on the right end face of the left fixing block of the clamp; the right side of the semi-ring right clamp cooperates with the arc-shaped guide rail on the left end face of the right fixing block of the clamp. The starting measurement mechanism includes a mandrel, a first coupling, a torque sensor, a second coupling, a reducer, and a handwheel; the reducer is mounted on the upper surface of the base plate; the torque sensor is fixed to the output shaft of the reducer via the second coupling; the handwheel is mounted on the input shaft of the reducer via a key connection; one side of the mandrel is connected to the torque sensor via the first coupling, and the other side corresponds to the semi-annular groove in the middle of the left and right semi-annular clamps; The torque sensor measures the starting torque of the self-lubricating material from a stationary state to the moment it begins relative motion, and the real-time torque of the self-lubricating material during dynamic friction.

2. The device for measuring the starting torque of self-lubricating materials based on a semi-ring test according to claim 1, characterized in that: The loading mechanism includes a loading base, a jack, a jack cover, a loading shaft, a rigid spring, and a drive shaft bracket. The loading base is fixed to one end of the rear side of the upper surface of the base plate. The jack is horizontally fixed to the upper part of the loading base via the jack cover. The loading shaft is coaxially fixed to the inner end of the jack. The rigid spring is axially installed on the outside of the loading shaft. The drive shaft bracket is located inside the loading shaft and its bottom is fixed to the base plate. The inner end of the loading shaft passes axially through the upper part of the drive shaft bracket and is coaxially threaded to a force sensor. The inner end of the rigid spring abuts against the left end face of the drive shaft bracket. The inner end face of the force sensor is fixed to one side of the semi-ring clamp mechanism.

3. The device for measuring the starting torque of self-lubricating materials based on a semi-ring test according to claim 1, characterized in that: A horizontal guide key is provided on the upper surface of the base plate in the area below the left fixing block of the clamp and the left half-ring clamp; the bottom of the left fixing block of the clamp and the left half-ring clamp respectively cooperate with the guide key moving pair.

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