A bearing sealing performance testing bench

Abstract

This utility model discloses a bearing sealing performance testing bench, relating to the field of bearing testing technology. The utility model includes a testing chamber containing a bearing, and a fixing mechanism located inside the testing chamber. Specifically, the bearing is placed below a fixing post and moved upwards. When the inner ring contacts the fixing block, a motor drives a gear two to rotate clockwise, which in turn drives a rotating block to rotate counterclockwise. The convex corner pushes the convex post and fixing block away, fixing the bearing's inner ring. After the test, the bearing is held at the bottom, and the motor drives the gear two to rotate counterclockwise, while the gear one drives the rotating block to rotate clockwise. The convex corner no longer presses against the convex post, and a spring pulls the fixing block closer. Once the convex post enters the groove, the bearing is released from fixation. This design, through the cooperation of the convex post and convex corner, can quickly fix the inner rings of bearings of different diameters, thereby improving overall testing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of bearing testing technology, and in particular relates to a bearing sealing performance testing bench. Background Technology

[0002] A bearing sealing performance test bench is a specialized mechanical device designed specifically for testing the reliability of bearing seals. By simulating the actual working conditions of the bearing or constructing a specific testing environment, it performs standardized testing on core sealing performance indicators such as the anti-leakage capability and airtightness of the internal lubricant of the bearing to determine whether the bearing sealing structure meets the usage requirements. It is widely used in bearing production quality inspection, after-sales maintenance and other scenarios.

[0003] Bearings consist of an outer ring, an inner ring, and balls. To ensure the bearing's sealing performance, a sealing ring is installed at the connection between the outer and inner rings to prevent internal lubricant and external dust, liquids, and gases from entering the sealing ring. Existing bearing sealing performance testing equipment uses a fixture to fix the inner ring of the bearing before rotating the outer ring for testing. However, most existing fixtures are fixed structures, making it difficult to quickly change the fixture to accommodate the diameter of the new bearing inner ring when fixing bearing inner rings of different diameters. This necessitates replacing the fixture when testing bearing inner rings of different diameters, significantly reducing testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a bearing sealing performance testing bench. By setting a fixing mechanism, specifically, the bearing is placed below the fixing column and moved upwards. When the inner ring contacts the fixing block, motor one drives gear two to rotate clockwise, and gear one drives the rotating block to rotate counterclockwise. The convex corner pushes the convex column and the fixing block away, fixing the bearing inner ring. After the test, the bottom of the bearing is held, motor one drives gear two to rotate counterclockwise, and gear one drives the rotating block to rotate clockwise. The convex corner no longer presses against the convex column, and the spring pulls the fixing block closer. After the convex column enters the groove, the bearing is released from fixing. This setting, through the cooperation of the convex column and the convex corner, can quickly fix bearing inner rings of different diameters, thereby improving the overall testing efficiency. It solves the problem that existing bearing sealing testing devices, when using clamps to fix the bearing inner ring, often have fixed dimensions, making it difficult to make real-time adjustments when facing bearing inner rings of different diameters, leading to the need to replace the clamps and thus reducing the overall testing efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a bearing sealing performance testing bench, comprising a testing chamber with a sealing door hinged to the front and a dust cover fixedly connected to the top. A bearing is housed inside the testing chamber. The bench also includes: a fixing mechanism, located inside the testing chamber, for fixing the bearing; the fixing mechanism includes a rotating block; four vertical supports are arranged inside the testing chamber; protruding columns are fixedly connected to the top of each vertical support; a fixing block is fixedly connected to the bottom of each vertical support; four protruding corners are fixedly connected to the outer surface of the rotating block; and four grooves are provided on the outer surface of the rotating block. A testing mechanism, also located inside the testing chamber, is used to test the sealing performance of the bearing. The fixing block is U-shaped, the protruding corners are arc-shaped, and the protruding corners and grooves are staggered. The U-shaped design of the fixing block can simultaneously support the top and bottom of the bearing, and the length of the top of the fixing block is longer than the length of the bottom of the fixing block.

[0007] Furthermore, a connecting ring is fixedly connected to the top of the rotating block, a gear is fixedly connected to the top of the connecting ring, a support frame is fixedly connected to the top of the test box, a motor is fixedly connected to the top of the support frame, and a gear is fixedly connected to the bottom of the motor, with the gear meshing with the gear. The support frame is used to support and install the motor. The connecting ring is rotatably connected to the test box. The top of the rotating block contacts the top of the inner wall of the test box, and the bottom of the gear contacts the top of the test box. This arrangement can limit the rotation of the rotating block and prevent it from shifting vertically when moving.

[0008] Furthermore, a second motor is fixedly connected to the top of the test box, and a rotating shaft is fixedly connected to the bottom of the second motor. The rotating shaft is rotatably connected to the test box, and a friction wheel is fixedly connected to the bottom of the rotating shaft. Several rubber strips are installed on the outer surface of the friction wheel, and the rubber strips are distributed in a ring on the outer surface of the friction wheel. The rubber strips on the outer surface of the friction wheel are in contact with the outer surface of the bearing. When the friction wheel rotates, the rubber strips on its outer surface can increase the friction force, so that the friction wheel can drive the outer ring of the bearing to rotate. The rubber strips on the outer surface of the friction wheel are made of polyurethane rubber.

[0009] Furthermore, a fixed column is fixedly connected to the top of the inner wall of the test chamber, the rotating block is rotatably connected to the outer surface of the fixed column, and four fixed tubes are fixedly connected to the outer surface of the fixed column; the four fixed tubes are distributed in a ring on the outer surface of the fixed column.

[0010] Furthermore, a spring is fixedly connected to the inner wall of the fixed tube, and a moving rod is fixedly connected to the side of the vertical frame near the fixed column. The moving rod is slidably limited by the fixed tube. The end of the spring away from the fixed column is fixedly connected to the side of the moving rod near the fixed column. Four fixing rings are fixedly connected to the top of the inner wall of the test box, and the protruding column is slidably limited by the fixing rings. The fixing rings are used to support and limit the protruding column, the spring is used to reset the moving rod, and the fixed tube is used to support and limit the moving rod. When the protruding column moves, the fixing rings enable the protruding column to move in a straight line without rotation.

[0011] Furthermore, a water injection pipe is fixedly connected to the right side of the test chamber, and a sealing plug is threaded onto the inner wall of the water injection pipe; the water injection pipe is interconnected with the interior of the test chamber, and the outer surface of the sealing plug is covered with rubber, which can prevent water inside the test chamber from flowing out through the water injection pipe.

[0012] Furthermore, a drain pipe is fixedly connected to the bottom of the test chamber, and a valve is installed inside the drain pipe; the drain pipe is interconnected with the inside of the test chamber, and the valve is used to open and close the drain pipe. The valve can quickly and flexibly open and close the drain pipe for better drainage.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model, through the setting of a fixing mechanism, specifically, involves placing the bearing below the fixing column and moving it upwards. When the inner ring contacts the fixing block, the motor one drives the gear two to rotate clockwise, and the gear one drives the rotating block to rotate counterclockwise. The convex corner pushes the convex column and the fixing block away, fixing the inner ring of the bearing. After the test, the bottom of the bearing is held, the motor one drives the gear two to rotate counterclockwise, and the gear one drives the rotating block to rotate clockwise. The convex corner no longer squeezes the convex column, and the spring pulls the fixing block closer. After the convex column enters the groove, the bearing is released from fixing. This setting, through the cooperation of the convex column and the convex corner, can quickly fix the inner ring of bearings of different diameters, thereby improving the overall testing efficiency.

[0015] 2. This utility model uses a testing mechanism. Specifically, after the bearing is fixed, its outer ring is in close contact with the outer rubber strip of the friction wheel. The motor is started and drives the friction wheel to rotate clockwise through the shaft. The friction wheel will drive the outer ring of the bearing to rotate counterclockwise. After the test is completed, the bearing is removed and weighed using an external weighing device. If the weight decreases, the lubricant is leaking. When testing the airtightness, the bearing is refixed and the sealing plug is removed. An external water pipe is connected to the water injection pipe to inject water. The water level is stopped after submerging the top of the bearing. The staff can observe whether bubbles are coming out of the bearing through the observation window of the sealed door. If bubbles are coming out, the seal is leaking. The airtightness can also be tested simultaneously when the bearing is rotated.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the support frame structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the valve structure of this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle;

[0022] Figure 5 This is a schematic diagram of the overall structure of the fixing mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the movable rod structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the connecting ring structure of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Test chamber; 11. Sealed door; 12. Dust cover; 13. Bearing; 2. Fixing mechanism; 21. Rotating block; 211. Connecting ring; 212. Gear 1; 213. Support frame; 214. Motor 1; 215. Gear 2; 22. Fixing column; 221. Fixing pipe; 222. Spring; 223. Moving rod; 224. Vertical frame; 225. Fixing block; 226. Protruding column; 227. Fixing ring; 228. Protruding corner; 229. Groove; 3. Test mechanism; 31. Water injection pipe; 32. Sealing plug; 33. Motor 2; 331. Rotating shaft; 332. Friction wheel; 34. Drain pipe; 341. Valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-7As shown, this utility model is a bearing sealing performance testing bench, including a test chamber 1, a sealing door 11 hinged to the front of the test chamber 1, a dust cover 12 fixedly connected to the top of the test chamber 1, a bearing 13 disposed inside the test chamber 1, and further including: a fixing mechanism 2, which is disposed inside the test chamber 1 and is used to fix the bearing 13, the fixing mechanism 2 including a rotating block 21, four vertical frames 224 disposed inside the test chamber 1, a protruding column 226 fixedly connected to the top of the vertical frame 224, a fixing block 225 fixedly connected to the bottom of the vertical frame 224, four protruding corners 228 fixedly connected to the outer surface of the rotating block 21, and four grooves 229 disposed on the outer surface of the rotating block 21; and a testing mechanism 3, which is disposed inside the test chamber 1 and is used to test the sealing performance of the bearing 13; the fixing block 225 is U-shaped, the protruding corners 228 are arc-shaped, and the protruding corners 228 and the grooves 229 are staggered. A connecting ring 211 is fixedly connected to the top of the rotating block 21, and a gear 212 is fixedly connected to the top of the connecting ring 211. A support frame 213 is fixedly connected to the top of the test chamber 1, and a motor 214 is fixedly connected to the top of the support frame 213. A gear 215 is fixedly connected to the bottom of the motor 214, and the gear 215 meshes with the gear 212. The support frame 213 is used to support and install the motor 214. The connecting ring 211 is rotatably connected to the test chamber 1. The top of the rotating block 21 contacts the top of the inner wall of the test chamber 1, and the bottom of the gear 212 contacts the top of the test chamber 1. A motor 33 is fixedly connected to the top of the test chamber 1, and a rotating shaft 331 is fixedly connected to the bottom of the motor 33. The rotating shaft 331 is rotatably connected to the test chamber 1, and a friction wheel 332 is fixedly connected to the bottom of the rotating shaft 331. Several rubber strips are installed on the outer surface of the friction wheel 332, and the rubber strips on the outer surface of the friction wheel 332 are distributed in a ring on the outer surface of the friction wheel 332. The rubber strips on the outer surface of the friction wheel 332 contact the outer surface of the bearing 13. A fixed column 22 is fixedly connected to the top of the inner wall of the test chamber 1. The rotating block 21 is rotatably connected to the outer surface of the fixed column 22. Four fixed tubes 221 are fixedly connected to the outer surface of the fixed column 22. The four fixed tubes 221 are distributed in a ring on the outer surface of the fixed column 22.A spring 222 is fixedly connected to the inner wall of the fixed tube 221. A moving rod 223 is fixedly connected to the side of the vertical frame 224 near the fixed column 22. The moving rod 223 is slidably limited to the fixed tube 221. The end of the spring 222 away from the fixed column 22 is fixedly connected to the side of the moving rod 223 near the fixed column 22. Four fixed rings 227 are fixedly connected to the top of the inner wall of the test box 1. The protruding column 226 is slidably limited to the fixed rings 227. The bearing 13 is placed below the fixed column 22 and moves upward. When the inner ring touches the fixed block 225, the motor 1 214 drives the gear 215 to rotate clockwise, and through the gear 1 212 drives the rotating block 21 to rotate counterclockwise. The protruding corner 228 pushes the protruding column 226 and the fixed block 225. 25 is moved away, fixing the inner ring of bearing 13. The test is over. Hold the bottom of bearing 13. Motor 1 214 drives gear 215 to rotate counterclockwise. Gear 1 212 drives rotating block 21 to rotate clockwise. The convex corner 228 no longer squeezes the convex post 226. The spring 222 pulls the fixing block 225 closer. After the convex post 226 enters the groove 229, the bearing 13 is released from fixation. This setting, through the cooperation of the convex post 226 and the convex corner 228, can quickly fix the inner ring of bearing 13 of different diameters, thereby improving the overall test efficiency. The fixing ring 227 is used to support and limit the convex post 226. The spring 222 is used to reset the moving rod 223. The fixing tube 221 is used to support and limit the moving rod 223.

[0029] A water injection pipe 31 is fixedly connected to the right side of the test chamber 1. A sealing plug 32 is threadedly connected to the inner wall of the water injection pipe 31. The water injection pipe 31 is connected to the inside of the test chamber 1. The outer surface of the sealing plug 32 is covered with rubber. A drain pipe 34 is fixedly connected to the bottom of the test chamber 1, and a valve 341 is installed inside the drain pipe 34. After the bearing 13 is fixed, its outer ring is in close contact with the outer rubber strip of the friction wheel 332. The motor 33 is started and drives the friction wheel 332 to rotate clockwise through the shaft 331. The friction wheel 332 will drive the outer ring of the bearing 13 to rotate counterclockwise. After the test is completed, the bearing 13 is removed and weighed using an external weighing device. If the weight decreases, the lubricant is leaking. When testing the airtightness, the bearing 13 is re-fixed and the sealing plug 32 is removed. The external water pipe is connected to the water injection pipe 31 to inject water. The water injection is stopped after the water level submerges the top of the bearing 13. The staff can observe whether there are bubbles inside the bearing 13 through the observation window of the sealing door 11. If there are bubbles, the seal is leaking. The airtightness can also be tested simultaneously when the bearing 13 is rotated. The drain pipe 34 is connected to the inside of the test chamber 1, and the valve 341 is used to open and close the drain pipe 34.

[0030] A specific application of this embodiment is as follows: In use, first use an external weighing device to weigh the bearing 13, then open the sealing door 11, then place the bearing 13 under the fixed column 22 and move it upwards. When the top of the inner ring of the bearing 13 contacts the fixed block 225, the motor 214 can be started to drive the gear 215 to rotate clockwise. Because the gear 215 meshes with the gear 212, the gear 212 will rotate counterclockwise. At the same time, the gear 212 drives the rotating block 21 to rotate counterclockwise through the connecting ring 211. At this time, the rotating block 21... The four protruding corners 228 on 1 will squeeze and push the protruding post 226 in contact with them away from each other. The protruding post 226 will move together with the fixing block 225 through the vertical frame 224 until the four fixing blocks 225 are in contact with the inner wall of the inner ring of the bearing 13 and stop moving. At this time, the inner ring of the bearing 13 has been fixed. When the vertical frame 224 moves, the moving rod 223 will stretch the spring 222. When the protruding post 226 and the moving rod 223 move, the fixing ring 227 will limit the protruding post 226 and the fixing tube 221 will limit the moving rod 223.

[0031] When the four fixing blocks 225 fix the inner ring of the bearing 13, they will slightly push the bearing 13 to move until the fixing is completed. Then the outer ring of the bearing 13 will be in close contact with the rubber strip on the outer surface of the friction wheel 332. At this time, the second motor 33 will drive the rotating shaft 331 to rotate clockwise, and the friction wheel 332 will follow. Since the inner ring of the bearing 13 is fixed, the friction wheel 332 will drive the outer ring of the bearing 13 to rotate counterclockwise. After the test time is reached, the second motor 33 will be turned off first. The operator will open the sealing door 11 and hold the bottom of the bearing 13. Then the first motor 214 will drive the second gear 215 to rotate counterclockwise. The second gear 215 will drive the rotating block 21 to rotate clockwise through the first gear 212. At this time, the four protruding corners 228 will no longer squeeze the four protruding pillars 226, and the four springs 222 will pull the four moving rods 223 closer to each other through their own elasticity. The four fixing blocks 225 will follow and move closer until the four protruding pillars 226 are all close to each other. When the bearing 13 enters the groove 229, it is released from its fixation and can be removed and weighed on an external weighing device. If the weight of the bearing 13 decreases, it indicates that the lubricant inside the bearing 13 has leaked. To test the airtightness of the bearing 13, the bearing 13 can be re-fixed first, then the sealing plug 32 can be rotated to remove it, and the external water pipe can be connected to the water injection pipe 31. Water can be injected into the water injection pipe 31. When the water level completely submerges the top of the bearing 13, the water injection can be stopped, and the sealing plug 32 can be rotated back into the water injection pipe 31. The staff can observe whether there are air bubbles inside the bearing 13 through the observation window on the sealing door 11 of the test chamber 1. If air bubbles are generated, it indicates that the seal of the bearing 13 has leaked. At the same time, the staff can also perform an airtightness test while rotating the bearing 13. After the test is completed, the valve 341 is opened to drain the water inside the test chamber 1 through the drain pipe 34, and then the bearing 13 is removed.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A bearing sealing performance testing bench, comprising a test chamber (1), wherein a sealing door (11) is hinged to the front of the test chamber (1), a dust cover (12) is fixedly connected to the top of the test chamber (1), and a bearing (13) is disposed inside the test chamber (1), characterized in that, Also includes: A fixing mechanism (2) is installed inside the test chamber (1) and is used to fix the bearing (13). The fixing mechanism (2) includes a rotating block (21). Four vertical frames (224) are provided inside the test chamber (1). A protruding column (226) is fixedly connected to the top of the vertical frame (224), and a fixing block (225) is fixedly connected to the bottom of the vertical frame (224). Four protruding corners (228) are fixedly connected to the outer surface of the rotating block (21), and four grooves (229) are provided on the outer surface of the rotating block (21). The testing mechanism (3) is located inside the testing chamber (1) and is used to test the sealing performance of the bearing (13). The fixing block (225) is U-shaped, the convex corner (228) is arc-shaped, and the convex corner (228) and the groove (229) are staggered.

2. The bearing sealing performance testing bench according to claim 1, characterized in that, The rotating block (21) is fixedly connected to the top of a connecting ring (211), and the connecting ring (211) is fixedly connected to the top of a gear (212). The test box (1) is fixedly connected to the top of a support frame (213), and the support frame (213) is fixedly connected to the top of a motor (214). The motor (214) is fixedly connected to the bottom of a gear (215), and the gear (215) meshes with the gear (212). The support frame (213) is used to support and install the motor (214), the connecting ring (211) is rotatably connected to the test box (1), the top of the rotating block (21) is in contact with the top of the inner wall of the test box (1), and the bottom of the gear (212) is in contact with the top of the test box (1).

3. The bearing sealing performance testing bench according to claim 1, characterized in that, The test box (1) is fixedly connected to the top of the motor (33), and the bottom of the motor (33) is fixedly connected to the rotating shaft (331). The rotating shaft (331) is rotatably connected to the test box (1), and the bottom of the rotating shaft (331) is fixedly connected to the friction wheel (332). The friction wheel (332) has several rubber strips installed on its outer surface. The rubber strips are arranged in a ring on the outer surface of the friction wheel (332). The rubber strips on the outer surface of the friction wheel (332) are in contact with the outer surface of the bearing (13).

4. The bearing sealing performance testing bench according to claim 2, characterized in that, The top of the inner wall of the test box (1) is fixedly connected to a fixed column (22), the rotating block (21) is rotatably connected to the outer surface of the fixed column (22), and four fixed tubes (221) are fixedly connected to the outer surface of the fixed column (22). The four fixed tubes (221) are arranged in a ring on the outer surface of the fixed column (22).

5. The bearing sealing performance testing bench according to claim 4, characterized in that, A spring (222) is fixedly connected to the inner wall of the fixed tube (221). A moving rod (223) is fixedly connected to the side of the vertical frame (224) near the fixed column (22). The moving rod (223) is slidably limited to the fixed tube (221). The end of the spring (222) away from the fixed column (22) is fixedly connected to the side of the moving rod (223) near the fixed column (22). Four fixing rings (227) are fixedly connected to the top of the inner wall of the test box (1). The protruding column (226) is slidably limited to the fixing rings (227). The fixing ring (227) is used to support and limit the protrusion (226), the spring (222) is used to reset the moving rod (223), and the fixing tube (221) is used to support and limit the moving rod (223).

6. The bearing sealing performance testing bench according to claim 5, characterized in that, A water injection pipe (31) is fixedly connected to the right side of the test box (1), and a sealing plug (32) is threaded onto the inner wall of the water injection pipe (31). The water injection pipe (31) is connected to the inside of the test box (1), and the sealing plug (32) is covered with rubber.

7. A bearing sealing performance testing bench according to claim 3, characterized in that, The bottom of the test box (1) is fixedly connected to a drain pipe (34), and a valve (341) is installed inside the drain pipe (34); The drain pipe (34) is connected to the inside of the test box (1), and the valve (341) is used to open and close the drain pipe (34).

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