Device and method for testing slurry immersion of hub bearing

Abstract

The invention relates to wheel hub bearing immersion detection, and discloses a wheel hub bearing mud immersion test device and a method thereof.The wheel hub bearing mud immersion test device comprises a driver, a loading arm and a first mud water pipe, an inner connecting disc is installed on a main shaft of the driver, an outer connecting disc is installed on the loading arm, a flange disc is installed on the inner connecting disc, and a water retaining frame is installed between the inner connecting disc and the outer connecting disc; one side of the water retaining frame is in contact connection with the outer connecting disc, the other side of the water retaining frame wraps the outer side of the flange disc, a first gap is formed between the water retaining frame and the flange disc, and the water outlet area S2 of the first gap is smaller than the nozzle area S1 of the first muddy water pipe. The immersion state of the rotating end bearing sealing assembly is achieved through the flow difference of flowing-in and flowing-out of muddy water in the water retaining frame. Flange plates with different outer diameters are selected, and the size of the first gap is controlled, so that the immersion test is realized. The device can be repeatedly used, does not contact with a rotating flange, does not affect the rotating speed of a bench test, avoids immersion of a rotating main shaft of equipment, and does not have adverse effects on the test equipment.

Description

Technical Field

[0001] The present invention relates to the immersion detection of hub bearings, and particularly to a test device and method for the mud immersion of hub bearings. Background Art

[0002] As a key component of an automobile, the hub bearing of an automobile plays an important role in bearing the load and guiding the rotation of the hub. Its performance directly affects the safety and reliability of the automobile. In actual application scenarios, the hub bearing needs to face complex and harsh working conditions. Especially in muddy, wet and other environments, the sealing performance and wear resistance have a decisive impact on the service life of the bearing and the overall performance of the automobile.

[0003] At present, the market pays increasing attention to the research on the sealing durability and wear resistance of hub bearings. In the prior art, such as the hub bearing immersion test device disclosed in the patent with the publication number CN106969881B, it can verify the wear resistance of the sealing material of the hub bearing to a certain extent. The device sets up vertical plates, protective covers and other structures in the water tank to immerse the center position of the bearing with muddy water and conduct intermittent rotation tests to evaluate the sealing durability. However, this traditional test device has certain limitations. For example, the flow and distribution of muddy water during the test are not precise enough, which may lead to incomplete and inaccurate test results. It cannot fully simulate the force and muddy water contact conditions of the hub bearing under actual complex working conditions, thus making it difficult to meet the growing demand for in-depth research on the performance of hub bearings. Summary of the Invention

[0004] The present invention aims at the deficiencies in the prior art and provides a test device and method for the mud immersion of hub bearings.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A test device for the mud immersion of a hub bearing includes a driver, a loading arm and a first mud pipe. An inner connection disk fixedly connected to the core shaft of the hub bearing is installed on the main shaft of the driver, and an outer connection disk fixedly connected to the outer ring of the hub bearing is installed on the loading arm.

[0007] A flange disk is installed on the inner connection disk. A water retaining frame for immersing the bearing is installed between the inner connection disk and the outer connection disk. One side of the water retaining frame is in contact connection with the outer connection disk, and the other side of the water retaining frame wraps around the outside of the flange disk. A first gap for the muddy water to flow out is formed between the water retaining frame and the flange disk, and the outlet area S2 of the first gap is smaller than the nozzle area S1 of the first mud pipe.

[0008] The first gap formed between the water baffle and the flange, and the outlet area S2 thereof is smaller than the spray port area S1 of the first mud pipe, which can effectively control the outflow speed and flow rate of the muddy water, make the muddy water act on the hub bearing more concentratedly and stably, improve the accuracy of the action of the muddy water on the bearing during the test, and make the test results better reflect the actual sealing and wear resistance of the bearing.

[0009] The immersion state of the rotating end bearing seal assembly is achieved through the flow difference of the muddy water flowing in and out of the water baffle. By selecting flanges with different outer diameters, first gaps with different widths can be obtained, so as to control the outflow of the muddy water to achieve the immersion test. This device can be used repeatedly, does not contact the rotating flange, does not affect the rotational speed of the bench test, and at the same time avoids the immersion of the rotating main shaft of the equipment, and does not have an adverse impact on the test equipment.

[0010] Preferably, the groove depth on the water baffle is h, the outer ring radius of the flange is r, h > r, the top end face of the water baffle is higher than the horizontal plane where the central axis of the flange is located, or the top end face of the water baffle coincides with the horizontal plane where the central axis of the flange is located.

[0011] The groove depth h of the water baffle is greater than the outer ring radius r of the flange, which can enable more muddy water to gather in the space formed between the water baffle and the flange, provide a more sufficient immersion environment for the hub bearing, ensure that all parts of the bearing can fully contact the muddy water, and thus more comprehensively test the sealing performance and the ability to resist muddy water erosion of the bearing.

[0012] Preferably, a second gap is provided between the water baffle and the inner connection disc. The muddy water flows through the first gap and the second gap in sequence, forming a more complex and continuous scouring path. During this process, the muddy water generates a multi-directional scouring effect on different parts of the hub bearing, can more comprehensively and deeply simulate the muddy water erosion situation suffered by the hub bearing under actual complex road conditions, and thus more accurately detect the weak links of the bearing sealing structure, improving the accuracy of the test for evaluating the bearing sealing performance.

[0013] Preferably, an outer notch is provided on one side of the water baffle connected to the outer connection disc, and an inner notch is provided on the other side of the water baffle close to the inner connection disc. Both the outer notch and the inner notch are arc-shaped notches. The minimum depth from the outer notch to the bottom of the water baffle groove is b, and the minimum depth from the inner notch to the bottom of the water baffle groove is c, and b < c.

[0014] Since the inner notch needs to be close to the flange, a first gap is formed between the two. The width of the first gap cannot be too wide, as being too wide is likely to cause the outflow volume of the muddy water to be greater than the inflow volume, thus affecting the immersion effect. Therefore, the minimum depth where the inner notch is located is greater than the depth of the outer notch.

[0015] Preferably, it further includes a second mud pipe. A water baffle is installed on the outer side of the loading arm. A chamber for accommodating mud and water is formed between the water baffle, the loading arm, and the outer ring of the hub bearing. The nozzle of the second mud pipe faces the chamber.

[0016] The second mud pipe directly pours mud and water into the chamber formed by the water baffle, the loading arm, and the outer ring of the hub bearing, enabling the mud and water to act on the outer seal of the hub bearing intensively and continuously, accurately simulating the impact and immersion of mud and water on this part when the vehicle is running, thereby more accurately detecting the sealing performance of the seal, effectively discovering potential sealing defects, and providing a reliable basis for the quality evaluation of the seal.

[0017] Preferably, the central axis of the inner connection disk coincides with the central axis of the outer connection disk. The top end face of the water baffle is higher than the horizontal plane where the central axis of the outer connection disk is located, or the top end face of the water baffle coincides with the horizontal plane where the central axis of the outer connection disk is located.

[0018] The coincidence of the central axes of the inner connection disk and the outer connection disk can ensure that the water baffle is evenly symmetric around the hub bearing, enabling the mud and water inside the water baffle to evenly contact the seal at the inner end of the hub bearing. At the same time, the top end face of the water baffle being higher than or coinciding with the horizontal plane where the central axis of the outer connection disk is located can ensure that the mud and water in the chamber formed by the water baffle, the loading arm, and the outer ring of the hub bearing can submerge the outer seal of the hub bearing, achieving a full and sufficient immersion of the seals at both ends of the hub bearing and ensuring the integrity and effectiveness of the test.

[0019] The test method for mud immersion of the hub bearing includes the following steps:

[0020] S1. Install the hub bearing between the inner connection disk and the flange disk. The outer ring of the hub bearing is fastened to the inner connection disk, and the core shaft of the hub bearing is fastened to the flange disk and the inner connection disk through screws.

[0021] S2. Fasten the water baffle to the loading arm. At least half of the area of the hub bearing is immersed in the water baffle, and at least half of the area of the inner seal of the hub bearing is immersed in the water baffle.

[0022] S3. Install a water baffle on the loading arm. A chamber is formed among the water baffle, the outer ring of the hub and the bearing, and the loading arm. The height of the water baffle is not lower than the central position of the hub bearing, and at least half of the area of the outer seal of the hub bearing is immersed in the chamber.

[0023] S4. Apply an axial force and a radial force to the hub bearing by the loading arm. The input range value of the axial force is 5 KN - 15 KN, and the input range value of the radial force is 1.5 KN - 5 KN.

[0024] S5. Start the driver. The driver drives the inner connection disk to rotate, and the inner connection disk synchronously drives the core shaft of the hub bearing to rotate.

[0025] S6. Start the water pump. The first mud pipe transports mud and water into the water baffle. Since the nozzle area of the first mud pipe is larger than the outlet area of the first gap, at least half of the area of the hub bearing will be immersed in the water baffle, and the second mud pipe transports mud and water into the chamber.

[0026] S7. The test duration is 200h - 500h. After the test, remove and disassemble the hub bearing to check if there is any water ingress.

[0027] Preferably, the outlet area The width of the first gap is a. d1 is the outer diameter of the other port of the water baffle, and d2 is the outer diameter of the flange. This facilitates technicians to quickly calculate the outlet area and the width of the first gap.

[0028] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects:

[0029] The first gap formed by the water baffle and the flange, and its outlet area S2 is smaller than the nozzle area S1 of the first mud pipe, which can effectively control the outflow speed and flow rate of the mud and water, making the mud and water act on the hub bearing more concentratedly and stably, improving the accuracy of the action of the mud and water on the bearing during the test, and enabling the test results to better reflect the actual sealing and wear resistance of the bearing.

[0030] The immersion state of the rotating end bearing seal assembly is achieved through the flow rate difference of the mud and water flowing in and out of the water baffle. By selecting flanges with different outer diameters, first gaps with different widths can be obtained, thereby controlling the outflow of the mud and water to achieve the immersion test. This device can be reused, does not contact the rotating flange, does not affect the rotational speed of the bench test, and at the same time avoids the immersion of the rotating main shaft of the equipment, and has no adverse impact on the test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the test device.

[0032] Figure 2 is a partial enlarged view of A.

[0033] Figure 3 is a schematic structural diagram of the water baffle.

[0034] Figure 4 is a schematic structural diagram of the hub bearing.

[0035] The names of the parts referred to by the above numerals in the drawings are as follows:

[0036] 10 - Driver

[0037] 11 - Loading arm

[0038] 12 - First mud pipe

[0039] 13 - Inner connection disk

[0040] 14 - Outer connection disk

[0041] 15 - Flange

[0042] 16 - Water baffle, 161 - Outer notch, 162 - Inner notch

[0043] 17 - Second mud pipe

[0044] 18 - Water baffle plate

[0045] 100 - First gap

[0046] 200 - Second gap

[0047] 300 - Chamber

[0048] 1 - Hub bearing mandrel

[0049] 2 - Hub bearing outer ring

[0050] 3 - Hub bearing inner seal

[0051] 4 - Hub bearing outer seal Detailed implementation mode

[0052] The following combines the attached Figures 1-4 And the embodiments further describe the present invention in detail.

[0053] Embodiment 1

[0054] The test device for mud immersion of hub bearings includes a driver 10, a loading arm 11 and a first mud pipe 12. In this embodiment, the driver 10 is a motor. An inner connection disk 13 fixedly connected to the hub bearing mandrel 1 is installed on the main shaft of the driver 10. The main shaft of the driver 10 is fixedly connected to the inner connection disk 13 through screws. An outer connection disk 14 fixedly connected to the hub bearing outer ring 2 is installed on the loading arm 11. Another set of screws passes through the hub bearing outer ring 2 and is fastened to the loading arm 11.

[0055] A flange 15 is installed on the inner connecting disk 13, and the flange 15 is used to simulate a brake disk. A water baffle 16 for submerging the bearing is installed between the inner connecting disk 13 and the outer connecting disk 14. One side of the water baffle 16 is in contact connection with the outer connecting disk 14, and the other side of the water baffle 16 wraps around the outside of the flange 15. A first gap 100 for muddy water to flow out is formed between the water baffle 16 and the flange 15. By selecting flanges 15 with different outer diameters, first gaps 100 with different width dimensions can be obtained. The outlet area S2 of the first gap 100 is smaller than the nozzle area S1 of the first mud pipe 12. By adjusting the clearance between the water baffle 16 and the selected flange 15, the outflow of muddy water is controlled; when the inflow of muddy water is greater than the outflow, the rotating end seal assembly of the hub bearing is submerged.

[0056] The groove depth on the water baffle 16 is h, and the outer ring radius of the flange 15 is r, where h > r. The top end face of the water baffle 16 is higher than the horizontal plane where the central axis of the flange 15 is located, or the top end face of the water baffle 16 coincides with the horizontal plane where the central axis of the flange 15 is located. At least half of the hub bearing is submerged in the muddy water inside the water baffle 16. When the hub bearing rotates, the seals on it can all be submerged in the muddy water, and the seal detection is more comprehensive, and the reliability of the immersion test is better.

[0057] A second gap 200 is provided between the water baffle 16 and the inner connecting disk 13. The second gap 200 is communicated with the first gap 100, and the muddy water inside the water baffle 16 flows out through the first gap 100 and the second gap 200.

[0058] An outer notch 161 is provided on the side of the water baffle 16 connected to the outer connecting disk 14, and an inner notch 162 is provided on the other side of the water baffle 16 close to the inner connecting disk 13. Both the outer notch 161 and the inner notch 162 are arc-shaped notches, and both the outer notch 161 and the inner notch 162 are semi-circular. The minimum depth from the outer notch 161 to the bottom of the groove of the water baffle 16 is b, and the minimum depth from the inner notch 162 to the bottom of the groove of the water baffle 16 is c, where b < c. Since the inner notch 162 needs to be close to the flange 15 and a first gap 100 is formed between them, the width of the first gap 100 cannot be too wide, otherwise it is easy to cause the outflow of muddy water to be greater than the inflow, thus affecting the immersion effect. Therefore, the minimum depth where the inner notch 162 is located is greater than the depth of the outer notch 161.

[0059] The test device further includes a second mud pipe 17. A water baffle 18 is installed on the outside of the loading arm 11. A chamber 300 for accommodating muddy water is formed between the water baffle 18, the loading arm 11, and the outer ring 2 of the hub bearing. The nozzle of the second mud pipe 17 faces the chamber 300, and the muddy water in the chamber 300 can contact the outer seal 4 of the hub bearing at the outer ring 2 of the hub bearing to implement the immersion test of the outer seal 4 of the hub bearing.

[0060] The central axis of the inner connecting plate 13 coincides with the central axis of the outer connecting plate 14. In this embodiment, the top end surface of the water baffle 18 is higher than the horizontal plane of the central axis of the outer connecting plate 14. In other embodiments, the top end surface of the water baffle 18 coincides with the horizontal plane of the central axis of the outer connecting plate 14. Having the top end surface of the water baffle 18 higher than or coinciding with the horizontal plane of the central axis of the outer connecting plate 14 ensures that the muddy water within the chamber 300 formed by the water baffle 18, the loading arm 11, and the hub bearing outer ring 2 can submerge the hub bearing outer seal 4, achieving complete and sufficient immersion of the seals at both ends of the hub bearing and ensuring the integrity and effectiveness of the test.

[0061] Example 2

[0062] The wheel hub bearing mud immersion test method includes the following steps:

[0063] S1, install the hub bearing between the inner connecting plate 13 and the flange 15, fasten the hub bearing outer ring 1 to the inner connecting plate 13, and fasten the hub bearing core shaft 1 to the flange 15 and the inner connecting plate 13 with screws;

[0064] S2, fasten the water retaining frame 16 to the loading arm 11, so that at least half of the wheel hub bearing area is immersed in the water retaining frame 16, and at least half of the wheel hub bearing inner seal 3 is immersed in the water retaining frame 16;

[0065] S3, a water baffle 18 is installed on the loading arm 11, and a chamber 300 is formed between the water baffle 18, the wheel hub bearing outer ring 2, and the loading arm 11. The height of the water baffle 18 is not lower than the center position of the wheel hub bearing, and at least half of the wheel hub bearing outer seal 4 is immersed in the chamber 300;

[0066] S4, the loading arm 11 applies axial and radial forces to the hub bearing. The axial force input range is 5 kN, and the radial force input range is 1.5 kN.

[0067] S5, start the driver 10, the driver 10 drives the inner connecting disk 13 to rotate, and the inner connecting disk 13 synchronously drives the hub bearing core shaft 1 to rotate;

[0068] S6, start the water pump, the first mud water pipe 12 supplies mud water into the water retaining frame 16. Since the nozzle area of the first mud water pipe 12 is larger than the outlet area of the first gap 100, at least half of the wheel hub bearing area will be immersed in the water retaining frame 16. The second mud water pipe 17 supplies mud water into the chamber 300.

[0069] S7, the test duration is 200 hours. After the test, remove and disassemble the wheel hub bearing to check whether there is water inside it.

[0070] Outlet area The width of the first gap 100 is a, d1 is the outer diameter of the other port of the water retaining frame 16, and d2 is the outer diameter of the flange 15. Technicians can use the above calculation formula.

[0071] Embodiment 3

[0072] Embodiment 3 is basically the same as Embodiment 2. The difference is that in S4, the loading arm 11 applies an axial force and a radial force to the hub bearing. The input range value of the axial force is 10 KN, and the input range value of the radial force is 3.25 KN.

[0073] S7, the test duration is 350 h. After the test, remove and disassemble the hub bearing to check if there is any water ingress inside.

[0074] Embodiment 4

[0075] Embodiment 4 is basically the same as Embodiment 2. The difference is that in S4, the loading arm 11 applies an axial force and a radial force to the hub bearing. The input range value of the axial force is 15 KN, and the input range value of the radial force is 5 KN.

[0076] S7, the test duration is 500 h. After the test, remove and disassemble the hub bearing to check if there is any water ingress inside.

Claims

1. Test device for mud immersion of hub bearings, comprising a driver (10), a loading arm (11) and a first mud pipe (12). An inner connecting disc (13) fixedly connected to the core shaft of the hub bearing is mounted on the main shaft of the driver (10). An outer connecting disc (14) fixedly connected to the outer ring of the hub bearing is mounted on the loading arm (11). It is characterized in that: A flange disc (15) is mounted on the inner connecting disc (13). A water retaining frame (16) for immersing the bearing is mounted between the inner connecting disc (13) and the outer connecting disc (14). One side of the water retaining frame (16) is in contact connection with the outer connecting disc (14). The other side of the water retaining frame (16) wraps around the outside of the flange disc (15). A first gap (100) for the mud and water to flow out is formed between the water retaining frame (16) and the flange disc (15). The outlet area S2 of the first gap (100) is smaller than the nozzle area S1 of the first mud pipe (12).

2. The test device for mud immersion of a hub bearing according to claim 1, characterized in that: The groove depth of the water retaining frame (16) is h, and the outer ring radius of the flange disc (15) is r. h > r. The top end face of the water retaining frame (16) is higher than the horizontal plane where the central axis of the flange disc (15) is located, or the top end face of the water retaining frame (16) coincides with the horizontal plane where the central axis of the flange disc (15) is located.

3. The test device for mud immersion of a hub bearing according to claim 1, characterized in that: A second gap (200) is provided between the water retaining frame (16) and the inner connecting disc (13).

4. The test device for mud immersion of the hub bearing according to claim 1, wherein: An outer notch (161) is provided on the side of the water retaining frame (16) connected to the outer connecting disc (14). An inner notch (162) is provided on the other side of the water retaining frame (16) close to the inner connecting disc (13). Both the outer notch (161) and the inner notch (162) are arc-shaped notches. The minimum depth from the outer notch (161) to the bottom of the groove of the water retaining frame (16) is b, and the minimum depth from the inner notch (162) to the bottom of the groove of the water retaining frame (16) is c. b < c.

5. The test device for mud immersion of a hub bearing according to claim 1, characterized in that: It further includes a second mud pipe (17). A water baffle (18) is mounted on the outside of the loading arm (11). A chamber (300) for accommodating the mud and water is formed between the water baffle (18), the loading arm (11) and the outer ring of the hub bearing. The nozzle of the second mud pipe (17) faces the chamber (300).

6. The test device for mud immersion of a hub bearing according to claim 5, characterized in that: The central axis of the inner connecting disc (13) coincides with the central axis of the outer connecting disc (14). The top end face of the water baffle (18) is higher than the horizontal plane where the central axis of the outer connecting disc (14) is located, or the top end face of the water baffle (18) coincides with the horizontal plane where the central axis of the outer connecting disc (14) is located.

7. Test method for mud immersion of hub bearings, characterized in that It includes the following steps: S1. Install the hub bearing between the inner connecting disc (13) and the flange disc (15). The outer ring of the hub bearing (1) is fastened on the inner connecting disc (13). The core shaft of the hub bearing (1) is fastened to the flange disc (15) and the inner connecting disc (13) by screws. S2. Fasten the water retaining frame (16) on the loading arm (11). At least half of the area of the hub bearing is immersed in the water retaining frame (16). At least half of the area of the inner seal (3) of the hub bearing is immersed in the water retaining frame (16). S3. Install a water baffle (18) on the loading arm (11). A chamber (300) is formed among the water baffle (18), the outer ring (2) of the hub bearing, and the loading arm (11). The height of the water baffle (18) is not lower than the central position of the hub bearing. At least half of the area of the outer seal (4) of the hub bearing is immersed in the chamber (300). S4. Apply an axial force and a radial force to the hub bearing by the loading arm (11). The input range of the axial force is 5 KN - 15 KN, and the input range of the radial force is 1.5 KN - 5 KN. S5. Start the driver (10). The driver (10) drives the inner connection disk (13) to rotate, and the inner connection disk (13) synchronously drives the spindle (1) of the hub bearing to rotate. S6. Start the water pump. The first mud pipe (12) conveys muddy water into the water baffle frame (16). Since the spray area of the first mud pipe (12) is larger than the water outlet area of the first gap (100), at least half of the area of the hub bearing will be immersed in the water baffle frame (16), and the second mud pipe (17) conveys muddy water into the chamber (300). S7. The test duration is 200 h - 500 h. After the test, remove and disassemble the hub bearing to check whether there is water ingress inside it.

8. The test method for mud immersion of a hub bearing according to claim 7, characterized in that: Outlet area The width of the first gap (100) is a, d1 is the outer diameter of the other side port of the water retaining frame (16), and d2 is the outer diameter of the flange (15).

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