Friction testing machine for fiber winding bearing

Abstract

The utility model relates to the technical field of bearing testing devices, in particular to a fiber-wound bearing friction testing machine. Comprising a bearing seat fixed on a test bottom plate, a hollow shaft is rotatably connected in the bearing seat, a test wheel is fixed on the top of the hollow shaft, a speed reducer is fixed on the other side of the test bottom plate, a transmission wheel is connected on an output shaft of the speed reducer, and the transmission wheel is rotatably connected with the test wheel through a transmission belt; the center of the test wheel is of a hollow structure, three inward double-shaft air cylinders are evenly distributed on the test wheel, and an external abutting block is fixed to a double-shaft connecting block on each double-shaft air cylinder. A supporting pedestal is arranged in a central round hole of the bearing pedestal, a round fixed round table is fixedly installed on the supporting pedestal through three evenly-distributed supporting columns, three evenly-distributed vertically-through rectangular grooves are formed in the fixed round table, and an internal abutting block is arranged above each rectangular groove; the fiber winding bearing testing device can be suitable for testing fiber winding bearings with different inner diameter and outer diameter specifications.

Description

Technical Field

[0001] This utility model relates to the technical field of bearing testing devices, and in particular to a fiber-wound bearing friction testing machine. Background Technology

[0002] Fiber-wound bearings typically consist of an outer load-bearing layer and an inner sliding layer. The outer load-bearing layer is made of epoxy resin and glass fiber continuously wound together, providing high strength and stability. The inner sliding layer is made of PTFE fiber and high-strength fiber, and filled with a special wear-resistant agent to achieve self-lubrication. The high-strength glass fiber reinforced high-temperature epoxy resin in the load-bearing layer has excellent corrosion resistance and high-temperature resistance, while the special fibers and PTFE fibers in the sliding layer give the bearing good wear resistance. Due to their lightweight and high strength, fiber-wound bearings are widely used in the aerospace field, in aircraft, spacecraft, and other equipment to ensure the safety and reliability of the equipment.

[0003] In the existing technology, there are very few devices for the sliding friction of the inner and outer layers of fiber-wound bearings. Most of them are test devices for deep groove ball bearings. There is an urgent need for a friction test machine that can be used for fiber-wound bearings of different specifications. Utility Model Content

[0004] To overcome the shortcomings of the prior art and achieve the above-mentioned functions, this utility model provides a fiber-wound bearing friction testing machine.

[0005] This utility model is achieved through the following technical solution:

[0006] A fiber-wound bearing friction testing machine includes a bearing seat fixed on a test base plate, a hollow shaft rotatably connected inside the bearing seat and a test wheel fixed on the top of the hollow shaft, a reducer fixed on the other side of the test base plate, a transmission wheel connected to the output shaft of the reducer, and the transmission wheel and the test wheel rotatably connected by a transmission belt.

[0007] The test wheel has a hollow center and three inward-facing dual-axis cylinders are evenly distributed on the test wheel. Each dual-axis cylinder has an external abutment block fixed on its dual-axis connecting block.

[0008] A support platform is provided in the central circular hole of the bearing housing. A circular fixed truncated cone is fixedly installed on the support platform by three evenly distributed support columns. The fixed truncated cone is provided with three evenly distributed rectangular grooves that run vertically through each other. An internal abutment block is provided above each rectangular groove.

[0009] Furthermore, the internal abutment block is cylindrical, and a vertical limiting block adapted to the limiting groove is provided at the bottom of the internal abutment block. The bottom of each limiting block is connected to the output shaft of the servo electric cylinder on the support base.

[0010] Furthermore, a platform cover is provided between the support platform and the fixed truncated cone, and the support platform, platform cover and fixed truncated cone are all in contact with the test wheel.

[0011] Furthermore, a groove is provided between each pair of limiting grooves, and a bottom block higher than the upper surface of the fixed circular platform is engaged in each groove.

[0012] Furthermore, the center positions of each inner abutment block and the outer abutment block are aligned, and the outer abutment block has a flat plate structure with double semicircles.

[0013] Furthermore, the reducer is connected to a drive motor fixed on the test base plate, and an encoder is installed on the drive motor.

[0014] Furthermore, an electrical control box and an air pump are also fixed on the test base plate.

[0015] The beneficial effects of this utility model are:

[0016] This invention is applicable to fiber-wound bearings with different inner and outer diameter specifications. For the friction resistance test of the inner and outer layers of the fiber-wound bearing, the relative rotation speed and number of revolutions can be customized. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model during operation;

[0018] Figure 2 This is an enlarged schematic diagram of the test wheel in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the test wheel of this utility model;

[0020] Figure 4 for Figure 3 Another perspective view after removing the pedestal cover and the fiber-wound bearing;

[0021] Figure 5 for Figure 2 A schematic diagram of the front structure;

[0022] Figure 6 This is a schematic diagram of the bottom structure after the test base plate has been removed;

[0023] Figure 7 for Figure 2 A three-dimensional cross-sectional view of the bearing after the fiber winding has been removed.

[0024] In the picture:

[0025] 1. Bearing housing; 101. Hollow shaft;

[0026] 2. Gearbox, 201. Drive motor, 202. Encoder

[0027] 3. Drive wheel, 301. Conveyor belt,

[0028] 4. Test wheel,

[0029] 5. Dual-shaft cylinder; 501. Dual-shaft connecting block; 502. External abutment block.

[0030] 6. Fixed frustum, 601. Limiting groove, 602. Support column, 603. Base block.

[0031] 7. Internal abutment block; 701. Limit block; 702. Servo electric cylinder.

[0032] 8. Support pedestal, 801. pedestal cover,

[0033] 10. Electrical control box; 11. Air pump; 12. Test base plate. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 7 As shown, this utility model includes a bearing seat 1 fixed on a test base plate 12, which provides a support medium for the rotation of the hollow shaft 101 above. The hollow shaft 101 is rotatably connected inside the bearing seat 1, and a test wheel 4 is fixed on the top of the hollow shaft 101. A reducer 2 is also fixed on the other side of the test base plate 12. A transmission wheel 3 is connected to the output shaft of the reducer 2. The transmission wheel 3 and the test wheel 4 are rotatably connected through a transmission belt 301 for rotational transmission.

[0037] The test wheel 4 has a hollow center to accommodate non-rotating components, and three inward-facing dual-axis cylinders 5 are evenly distributed on the test wheel 4. Each dual-axis cylinder 5 has an external abutment block 502 fixed on its dual-axis connecting block 501.

[0038] A support base 8 is provided in the central circular hole of the bearing housing 1. A circular fixed truncated cone 6 is fixedly installed on the support base 8 by three evenly distributed support columns 602. The fixed truncated cone 6 is provided with three evenly distributed rectangular grooves 601 that run vertically through each other. An internal abutment block 7 is provided above each rectangular groove 601.

[0039] The inner abutment block 7 is cylindrical and can abut against and adapt to the inner layer of the limiting winding bearing of different diameters to prevent the inner layer from rotating. The bottom of the inner abutment block 7 is provided with a vertical limiting block 701 that matches the limiting groove 601. The bottom of each limiting block 701 is connected to the output shaft of the servo electric cylinder 702 on the support base 8. The servo electric cylinder 702 can extend and retract precisely according to the set parameters, and work together with the limiting block 701 to control the displacement of the inner abutment block 7.

[0040] like Figure 7 A platform cover 801 is provided between the support platform 8 and the fixed truncated cone 6. The support platform 8, platform cover 801 and fixed truncated cone 6 are not in contact with the test wheel 4. The top center of the platform cover 801 has a circular hole structure to avoid interfering with the movement of the limiting block 701. Figure 6 This explains that the internal components can be connected to the outside via wires at the bottom, preventing coil tangling.

[0041] A groove is provided between each pair of limiting grooves 601, and a bottom block 603 higher than the upper surface of the fixed truncated cone 6 is engaged in each groove. In the initial stage, it is used to raise the fiber-wound bearing. After the inner and outer layers of the fiber-wound bearing are abutted, it can be manually removed in the horizontal direction, or it can be left unremoved.

[0042] The center positions of each inner abutment block 7 and the outer abutment block 502 are aligned. The outer abutment block 502 has a flat plate and a double semicircle structure, which ensures that it abuts the outer layer of the fiber-wound bearing as much as possible to prevent stress concentration or weak abutment. The arc surfaces of the two semicircles of the outer abutment block 502 abut against the fiber-wound bearings of different outer diameters.

[0043] The reducer 2 is connected to the drive motor 201 fixed on the test base plate 12. The drive motor 201 is equipped with an encoder 202, which can indirectly control the number of test cycles.

[0044] The test base plate 12 is also fixed with an electrical control box 10 and an air pump 11. The electrical control box 10 has built-in conventional electrical components such as PLC and relays, and is also equipped with an interface for connecting to the host computer. The air pump provides power to the cylinder. These are all existing technologies and will not be described in detail.

[0045] The working principle of this utility model is as follows: (1) As Figure 2As shown, the fiber-wound bearing is placed on the fixed truncated cone 6. At this time, the dual-axis cylinder 5 is in the retracted state, and the servo cylinder 702 is in the extended state. The fiber-wound bearing to be tested is placed between the two abutting blocks. (2) Then, the dual-axis cylinder 5 extends, the servo cylinder 702 retracts, the inner abutting block 7 abuts against the inner layer of the fiber-wound bearing, and the outer abutting block abuts against its outer layer. (3) The transmission wheel 3 is controlled to rotate, which drives the test wheel 4 to rotate. Due to the friction between the outer abutting block and the outer layer of the fiber-wound bearing, the outer layer rotates. The inner layer does not rotate, and the inner and outer layers of the fiber-wound bearing rotate relative to each other, generating friction. By setting different numbers of revolutions and speeds, the temperature and wear condition of the fiber-wound bearing after the test can be observed.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A filament wound bearing friction tester comprising a bearing housing (1) fixed to a test bed (12), characterised in that: The hollow shaft (101) is rotatably connected in the bearing seat (1), and a test wheel (4) is fixed on the top of the hollow shaft (101); a speed reducer (2) is further fixed on the other side of the test base plate (12), and a transmission wheel (3) is connected to the output shaft of the speed reducer (2); and the transmission wheel (3) is rotatably connected with the test wheel (4) through a transmission belt (301). The test wheel (4) is hollow in the center, and three inward double-shaft air cylinders (5) are uniformly distributed on the test wheel (4); and an external abutting block (502) is fixed on the double-shaft connecting block (501) of each double-shaft air cylinder (5). A support pedestal (8) is arranged in the center hole of the bearing seat (1), a circular fixed circular table (6) is fixedly installed on the support pedestal (8) through three evenly distributed support columns (602), three evenly distributed and vertically penetrating limiting grooves (601) are arranged on the fixed circular table (6), and an internal abutting block (7) is arranged above each limiting groove (601).

2. The fiber-wound bearing friction tester of claim 1, wherein: The internal abutting block (7) is in a cylindrical shape, and a vertical limiting block (701) matched with the limiting groove (601) is arranged at the bottom of the internal abutting block (7); and the bottom of each limiting block (701) is connected with the output shaft of a servo cylinder (702) on the support pedestal (8).

3. The fiber-wound bearing friction tester of claim 1, wherein: A pedestal cover (801) is arranged between the support pedestal (8) and the fixed circular table (6), and the support pedestal (8), the pedestal cover (801) and the fixed circular table (6) are not in contact with the test wheel (4).

4. The fiber-wound bearing friction tester of claim 1, wherein: A groove is arranged between every two limiting grooves (601), and a bottom block (603) higher than the upper end face of the fixed circular table (6) is clamped in each groove.

5. The fiber-wound bearing friction tester of claim 2, wherein: The center position of each internal abutting block (7) is aligned with that of the external abutting block (502), and the external abutting block (502) is in a structure of a flat plate plus two semicircles.

6. The fiber-wound bearing friction tester of claim 1, wherein: The speed reducer (2) is connected with a driving motor (201) fixed on the test base plate (12), and an encoder (202) is installed on the driving motor (201).

7. The fiber-wound bearing friction tester of claim 1, wherein: An electric control box (10) and an air pump (11) are further fixed on the test base plate (12).

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