Device for testing salt spray resistance of rolling bearing in dynamic state
By designing a salt spray resistance test device under dynamic dynamics of rolling bearings including motors and test components, the problem that the prior art cannot conduct comprehensive testing of bearings in dynamic rotation is solved, and synchronous testing of bearings of multiple specifications is achieved, which improves test efficiency and reduces costs.
Patent Information
- Application Number
- CN202421836358.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing rolling bearing salt spray resistance performance test devices cannot conduct comprehensive testing of bearings in dynamic rotation, and cannot test multiple bearings of various specifications at the same time, resulting in low testing efficiency and high cost.
A salt spray resistance test device under dynamic rolling bearings including motors and test components is designed. The synchronous testing of multiple bearings of the same or different specifications is achieved through multiple sets of test units and connecting shafts of different diameters.
It realizes accurate, efficient and convenient salt spray resistance testing of rolling bearings in dynamic state, improves testing efficiency, reduces testing costs, and can adapt to the testing needs of bearings of different specifications.
Smart Images
Figure CN222825264U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bearing detection, and in particular relates to a dynamic salt spray resistance performance test device for a rolling bearing. Background Art
[0002] The salt spray resistance of rolling bearings is an important parameter to pay attention to during the equipment application process. Since rolling bearings work under specific working conditions, if the salt spray resistance is poor, it may cause rust on the bearing raceway, aggravating the damage and failure of the raceway, and then leading to the failure of the bearing and even the entire equipment. Therefore, when testing bearing products, it is necessary to accurately test the salt spray resistance of the bearing.
[0003] At present, the test device for the salt spray resistance performance test of bearings only uses the method of placing the rolling bearings in a salt spray environment, so that the bearings are in a static state and tested for corrosion resistance within a set time. In actual working conditions, bearings are often in a salt spray environment in a dynamic rotating state. When the bearings rotate, the gap formed by the misalignment of the inner ring and the outer ring will also cause the inside of the bearing to be corroded by the salt spray. The current method of placing the bearings in a salt spray environment for testing does not meet the actual working conditions and cannot fully test the inside and outside of the bearings. In addition, some commonly used rolling bearing test benches can only test rolling bearings of a single specification at the same time because of the fixed size of the bearing seat. When it is necessary to test bearings of different specifications, the test equipment can only be replaced with another specification as a whole, which not only has low test efficiency, but also high test costs.
[0004] Therefore, it is very necessary to design a device that can synchronously test the salt spray resistance performance of bearings of various specifications under dynamic conditions. Utility Model Content
[0005] In view of the deficiencies of the above-mentioned prior art, the utility model aims to provide a dynamic salt spray resistance performance test device for rolling bearings. By connecting a motor with a test assembly, a plurality of test units are arranged in the test assembly. A plurality of bearings of different specifications are coaxially connected between the test units through connecting shafts of different diameters. The structure is optimized, so that the utility model can accurately, efficiently and conveniently test the salt spray resistance performance of a plurality of rolling bearings of the same or different specifications in a rotating state simultaneously.
[0006] The utility model is realized by the following technical solutions:
[0007] A salt spray resistance performance test device for a rolling bearing under dynamic conditions, comprising a test assembly arranged in a test box and a motor arranged outside the test box; the test assembly comprises a plurality of groups of test units, each group of test units comprises a test bearing, a connecting shaft, a bearing seat, an end cover and a fastening nut, and a plurality of groups of test units are arranged end to end in sequence through a connecting shaft; the test bearing is arranged in the bearing seat, and the outer ring of the test bearing is connected to the bearing seat through the end cover; the first end of the connecting shaft is arranged as a threaded end, and the end of the threaded end is provided with a slot; the second end of the connecting shaft A shaft shoulder is provided, and a protrusion is provided on the outer side of the shaft shoulder. The slot and the protrusion of the connecting shaft are both set to matching square structures. The protrusion at the second end of the connecting shaft is inserted into the slot of the first end of the adjacent connecting shaft. The connecting shaft passes through the inner ring of the tested bearing, and the first end of the inner ring of the tested bearing is limited by the shaft shoulder. The second end of the inner ring of the tested bearing is matched and connected with the threaded end of the connecting shaft through the fastening nut. The motor extends the rotating shaft into the test box through a coupling and connects it to the connecting shaft. The test box is connected to a salt spray generating device.
[0008] Preferably, the bearing seat heights of each group of test units are the same, the bearing seat hole set on each bearing seat matches the size of the test bearing installed on the corresponding bearing seat, and the center line of each bearing seat hole is coaxially arranged with the center line of the rotating shaft of the motor.
[0009] Preferably, the outer ring of the test bearing of each test unit and the inner edge of the bearing seat hole on the corresponding bearing seat are arranged to engage with each other.
[0010] Preferably, the diameters of the connecting shafts of each group of test units are the same or different, and the structures of the slots and protrusions arranged at both ends of the connecting shafts match and have the same sizes.
[0011] Preferably, the diameter of the connecting shaft of the same group of tested units matches the inner diameter of the inner ring of the tested bearing.
[0012] Preferably, the end cover is connected to the bearing seat by fastening bolts.
[0013] Preferably, a slot matching the protrusion on the connecting shaft is provided at the end of the rotating shaft of the motor, and the rotating shaft is connected to the connecting shaft through the matching of the slot and the protrusion.
[0014] Preferably, the salt mist generating device is connected to the test box through an air charging pipe and injects salt mist gas into the test box.
[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0016] 1. The utility model can install and fix multiple test units of the same or different specifications at one time through connecting shafts with matching diameters, and can realize salt spray resistance performance tests on multiple rolling bearings simultaneously, thereby improving test efficiency.
[0017] 2. The utility model matches the test bearings of different specifications and their matching bearing seats through connecting shafts of different diameters, and the structures of the slots and protrusions arranged at both ends of the connecting shafts of different diameters match and have the same size, which can meet the connection between rolling bearings of various specifications. When testing bearings of different specifications, it is only necessary to replace the bearing seats, end covers, connecting shafts and test bearings of corresponding specifications, which is convenient to operate, and the number of parts to be replaced is small, which can effectively reduce the test cost.
[0018] 3. The slots and protrusions at both ends of the connecting shaft of the utility model are designed with a square structure, which can realize the reliable transmission of multiple connecting shafts and make the connecting shafts have strong driving force when rotating. There is no need to set a locking device. Direct plug-in and fixation can realize the synchronous rotation of the tested bearings without dislocation and slippage.
[0019] 4. The bearing seats of the utility model have the same height, but the specifications of the bearing seat holes arranged on the bearing seats are different and the bearing seat holes are arranged coaxially with the rotating shaft of the motor, so that multiple groups of test units and between the test components and the motor can always maintain the coaxial setting without adjustment, which is convenient to operate, precise positioning, and improves the test efficiency.
[0020] 5. The utility model drives the tested bearing to perform the salt spray resistance test in a rotating state through a motor drive, which solves the drawback that the salt spray resistance of the bearing cannot be fully tested when the bearing is placed statically in a salt spray test chamber, and can also obtain the test data of the salt spray resistance of the bearing more accurately. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of a dynamic salt spray resistance performance test device for rolling bearings of the utility model;
[0022] Figure 2 It is an enlarged view of the test unit of the utility model.
[0023] Description of the markings in the figure:
[0024] 1. Motor; 2. Coupling; 3. Test box; 4. Box cover; 5. Bearing seat; 6. End cover; 7. Test bearing; 71. Outer ring of test bearing; 72. Inner ring of test bearing; 8. Connecting shaft; 81. Slot; 82. Protrusion; 83. Shoulder; 84. Threaded end; 9. Fastening nut; 10. Rotating shaft. DETAILED DESCRIPTION
[0025] In order to fully describe the technical content, structural features, objectives and beneficial effects of the present invention, the following will be described in detail with reference to the accompanying drawings.
[0026] The utility model provides a dynamic salt spray resistance performance test device for rolling bearings, such as Figure 1 to Figure 2 As shown, it includes a test assembly arranged in a test box 3 and a motor 1 arranged outside the test box 3 , and the motor 1 passes through the wall of the test box 3 to connect with the test assembly.
[0027] The test assembly is arranged in the test box 3, and a box cover 4 is arranged on the test box 3 for protecting the test assembly and keeping sufficient salt spray gas in the test box at all times. The test box 3 is connected to the salt spray generating device, and the salt spray generating device injects salt spray gas into the test box 3 through the inflation pipe, so that the test box continuously maintains the specific salt spray environment during the test process.
[0028] The test assembly includes several groups of test units, each of which includes a test bearing 7, a connecting shaft 8, a bearing seat 5, an end cover 6 and a fastening nut 9. The test bearing 7 is arranged in the bearing seat 5, and the outer ring 71 of the test bearing is fixedly connected to the bearing seat 5 through the end cover 6. In a preferred embodiment of the utility model, the end cover 6 is fixedly connected to the bearing seat 5 by fastening bolts, thereby fixing the outer ring 71 of the test bearing in the bearing seat 5.
[0029] Multiple groups of test units are connected end to end in sequence through a connecting shaft 8. The first end of the connecting shaft 8 is set as a threaded end 84, and the circumference of the threaded end 84 is provided with an external thread. The end of the threaded end 84 is provided with a square groove 81. The second end of the connecting shaft 8 is provided with a shoulder 83 for limiting the inner ring 72 of the tested bearing, and the outer side of the shoulder 83 is provided with a square protrusion 82 matching the groove 81 of the threaded end. The groove 81 of the connecting shaft and the protrusion 82 of the connecting shaft are both set as mutually matching square structures, and the protrusion 82 of the second end of a connecting shaft can be inserted into the groove 81 of the first end of the adjacent connecting shaft, thereby connecting two adjacent groups of test units.
[0030] The threaded end 84 of the connecting shaft 8 passes through the inner ring 72 of the test bearing, the first end of the inner ring 72 of the test bearing is limited by the shoulder 83 on the connecting shaft, and the second end of the inner ring 72 of the test bearing is fixed by the outer thread of the threaded end 84 of the connecting shaft through the fastening nut 9, that is, the fastening nut 9 is sleeved on the threaded end and the inner ring 72 of the test bearing is locked and fixed by thread cooperation.
[0031] The square-structured slot 81 and protrusion 82 of the utility model are fixedly connected, so that the connecting shaft 8 can realize reliable transmission of the tested bearings driven by multiple connecting shafts 8 under the drive of the rotating shaft 10 of the motor, and the design of the square-structured slot 81 and protrusion 82 makes the connecting shaft 8 have a strong driving force when rotating, and synchronous rotation can be achieved without adding a separate locking device, and there will be no dislocation and slippage, which is easy to operate and has a high safety factor.
[0032] The diameters of the connecting shafts 8 in each group of test units are the same or different. The diameters of the connecting shafts 8 in the same group of test units match the inner diameters of the inner rings 72 of the corresponding test bearings. In a preferred embodiment of the utility model, the test device can test multiple test bearings 7 of the same specification at the same time, and can also test multiple test bearings 7 of different specifications at the same time. In the utility model, there are several connecting shafts 8, and there are multiple spare shafts of the same diameter and different diameters. When testing test bearings of different specifications, the diameters of the connecting shafts 8 will be different. The diameter of the connecting shaft 8 selected by each group of test units should be compatible with the inner diameter of the inner ring 72 of its corresponding test bearing.
[0033] The motor 1 is arranged outside the test box 3, and the motor 1 extends the rotating shaft 10 into the test box 3 through the coupling 2 and is connected to the end of the connecting shaft 8. In the preferred embodiment of the utility model, the end of the rotating shaft 10 connected to the motor 1 is provided with a slot 81 matching the protrusion 82 on the connecting shaft 8, and the rotating shaft 10 and the connecting shaft 8 are plugged and fixed by the slot 81 and the protrusion 82, which is convenient for connection and disassembly.
[0034] In the utility model, the height of the bearing seats 5 of each group of test units is the same. The utility model is processed with multiple bearing seats for backup. During processing, there are several bearing seats 5 with bearing seat holes of the same diameter and bearing seat holes of different specifications, so as to facilitate replacement and adaptation when testing test bearings 7 of different specifications.
[0035] According to the size of the tested bearing 7, the bearing seat hole set on the selected single bearing seat 5 needs to match the size of the tested bearing 7 installed on the corresponding bearing seat 5, and the outer ring 71 of the tested bearing of the same group of tested units is connected to the inner edge of the bearing seat hole on the bearing seat 5 of this group. The center line of each bearing seat hole is coaxially arranged with the center line of the motor shaft 10, that is, the axis of the shaft 10 and the axes of the multiple connecting shafts 8 connected end to end are on the same horizontal straight line, which does not need to adjust the axis height during installation, and facilitates better coaxial transmission.
[0036] The motor 1 drives the connecting shaft 8 connected end to end to rotate through the rotating shaft 10, and synchronously drives the inner ring 72 of the tested bearing to rotate relative to the outer ring 71 of the tested bearing, so that the tested bearing 7 is tested for salt spray performance in a rotating state.
[0037] The specific implementation of the utility model is further described below:
[0038] The utility model provides a dynamic salt spray resistance performance test device for rolling bearings, such as Figure 1 As shown, it includes a motor 1, a coupling 2, a rotating shaft 10, a test box 3, a box cover 4, a bearing seat 5, an end cover 6, a test bearing 7, a connecting shaft 8 and a fastening nut 9. The outer ring 71 of the test bearing is installed and fixed in the bearing seat 5 through the end cover 6, and the connecting shaft 8 passes through the inner ring 72 of the test bearing and is fixed to the bearing seat 5 through the threaded engagement with the threaded end 84 of the connecting shaft by the fastening nut 9. A test bearing 7, a bearing seat 5, an end cover 6 and a fastening nut 9 constitute a test unit, and multiple test units constitute a test assembly, which is arranged in the test box 3 and connected end to end through the connecting shaft 8.
[0039] The utility model can test multiple test bearings 7 of the same specification at the same time, and can also test test bearings 7 of different specifications at the same time. The axis of the connecting shaft 8 connecting the test bearings 7 and the axis of the rotating shaft 10 of the motor are on the same horizontal straight line.
[0040] Embodiment 1: When testing multiple test bearings 7 of the same specification:
[0041] 1. Fix the position of the motor first, and extend the end of the shaft into the interior of the test box 3.
[0042] 2. Then assemble multiple groups of test units of the same specifications, plug and fix one end of the connecting shaft 8 on the first group of test units with the rotating shaft 10, determine the position of the first group of test units in the test box 3, and fix the bearing seat 5 to the bottom of the test box 3 by tightening bolts.
[0043] 3. Next, the connecting shafts 8 of the multiple groups of test units are plugged and fixed with the connecting shafts 8 of the previous group of test units in sequence to determine the position, and the bearing seats 5 are fixed to the bottom of the test box 3 by tightening bolts one by one.
[0044] 4. After installation, the box cover 4 is used to seal the box, which can better protect the test environment in the test box 3.
[0045] 5. Start the motor 1 and set the test time. The motor 1 drives the rotating shaft 10 to rotate, which can drive the connecting shafts 8 of multiple test units and the inner rings 72 of the test bearings fixed thereto to rotate relative to the outer rings 71 of the test bearings at the same time.
[0046] 6. While conducting the test, in accordance with the test requirements, salt spray gas is continuously injected into the test box 3 through an external salt spray generating device to generate a salt spray environment of specific conditions in the test box 3, and the motor 1 drives each test bearing 7 to rotate to obtain test data of the salt spray resistance performance of each test bearing 7 in a moving state.
[0047] Since the diameters of the test bearings 7 of the multiple groups of test units in this embodiment are the same, the diameters of the connecting shafts 8 connecting the various groups of test units are the same and are compatible with the inner rings 72 of the test bearings fixed thereto, and the bearing seats 5 in the test assembly are of the same specifications and are compatible with the outer rings 71 of the test bearings they carry.
[0048] Embodiment 2: When testing a plurality of test bearings 7 of different specifications:
[0049] It is only necessary to dismantle the bearing seat 5 of the test unit of the same specification, replace it with an assembled test unit of a different specification, and then conduct the test in conjunction with the motor 1.
[0050] Since the specifications of the test bearings 7 of the multiple groups of test units are different, it is necessary to assemble the test bearings 7 of different specifications with the bearing seat 5 provided with a matching bearing seat hole, and fix them through a connecting shaft 8 that matches the inner diameter of the inner ring 72 of the test bearing of this specification. After assembling one by one, they are connected and fixed in the test box 3 in sequence according to the above steps, and then the test can be carried out.
[0051] The heights of the bearing seats 5 designed in the utility model are the same, and only the specifications of the bearing seat holes set in the bearing seats 5 are different to meet the needs of installing the tested bearings 7 of different specifications. Although the specifications of the bearing seat holes are different, the heights of the axes of the bearing seat holes are ensured to be the same during processing, so that even after the tested bearings 7 of different specifications are installed, the coaxial arrangement of the bearings can be maintained. In addition, each bearing seat hole is also coaxially arranged with the rotating shaft 10 of the motor 1.
[0052] Therefore, the utility model only needs to replace the test unit composed of the test bearing 7, the bearing seat 5, the connecting shaft 8 and the end cover 6 of different specifications, and after reconnecting and fixing them, it can realize the test of multiple test bearings 7 of the same specification or different specifications, which is easy to operate, improves the test efficiency and reduces the test cost.
[0053] In the present invention, the structures of the slots 81 and the protrusions 82 provided at both ends of the connecting shaft 8 match and are consistent in size, so that connecting shafts 8 of different diameters can be connected end to end through the slots 81 and protrusions 82 of substantially the same size. The salt spray resistance performance test is performed when the motor 1 drives the test bearing 7 to rotate, which solves the drawback of placing the test bearing 7 in a salt spray environment for testing, and can accurately obtain the data of the salt spray resistance performance test of the rolling bearing in a dynamic state.
[0054] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.
Claims
1. A dynamic salt spray resistance test device for rolling bearings, characterized in that: It includes a test assembly arranged in a test box and a motor arranged outside the test box; The test assembly includes several groups of test units, each group of test units includes a test bearing, a connecting shaft, a bearing seat, an end cover and a fastening nut, and the multiple groups of test units are arranged end to end in sequence through the connecting shaft; the test bearing is arranged in the bearing seat, and the outer ring of the test bearing is connected to the bearing seat through the end cover; the first end of the connecting shaft is arranged as a threaded end, and the end of the threaded end is provided with a groove; the second end of the connecting shaft is provided with a shoulder, and the outer side of the shoulder is provided with a protrusion, the groove and protrusion of the connecting shaft are both arranged as matching square structures, and the protrusion at the second end of the connecting shaft is inserted into the groove of the adjacent first end of the connecting shaft; the connecting shaft passes through the inner ring of the test bearing, and the first end of the inner ring of the test bearing is limited by the shoulder, and the second end of the inner ring of the test bearing is matched and connected with the threaded end of the connecting shaft through the fastening nut; The motor extends the rotating shaft into the test box through a coupling and connects it to the connecting shaft; The test box is communicated with the salt spray generating device.
2. The dynamic salt spray resistance test device for rolling bearings according to claim 1 is characterized in that: The bearing seat heights of each group of test units are the same, the bearing seat hole arranged on each bearing seat matches the size of the test bearing installed on the corresponding bearing seat, and the center line of each bearing seat hole is coaxially arranged with the center line of the rotating shaft of the motor.
3. The dynamic salt spray resistance test device for rolling bearings according to claim 2 is characterized in that: The outer ring of the tested bearing of each tested unit is engaged with the inner edge of the bearing seat hole on the corresponding bearing seat.
4. The dynamic salt spray resistance test device for rolling bearings according to claim 1 is characterized in that: The diameters of the connecting shafts of the test units of each group are the same or different, and the structures of the slots and protrusions arranged at both ends of the connecting shaft match and have the same size.
5. The dynamic salt spray resistance test device for rolling bearings according to claim 4 is characterized in that: The diameter of the connecting shaft of the same group of test units matches the inner diameter of the inner ring of the test bearing.
6. The dynamic salt spray resistance performance test device for rolling bearings according to claim 1 is characterized in that: The end cover is connected to the bearing seat by fastening bolts.
7. The dynamic salt spray resistance performance test device for rolling bearings according to claim 1 is characterized in that: The end of the rotating shaft of the motor is provided with a clamping groove matching the protrusion on the connecting shaft, and the rotating shaft is connected to the connecting shaft through the matching of the clamping groove and the protrusion.
8. The dynamic salt spray resistance test device for rolling bearings according to claim 1 is characterized in that: The salt mist generating device is communicated with the test box through an air charging pipe.