A double rolling bearing testing device and method

Abstract

The application relates to a double-rolling bearing test device and method, which comprises a rotating shaft, a dismounting mechanism arranged at one side of the rotating shaft, a dismounting driving element, a dismounting shaft sleeve connected with the dismounting driving element, the dismounting shaft sleeve being coaxially arranged with the rotating shaft and capable of contacting the inner ring of a test bearing, a first bearing seat and a second bearing seat capable of being detachably connected and each being provided with a bearing mounting cavity, the first bearing seat being provided with a first locking mechanism matched with a connecting shaft sleeve, the second bearing seat being provided with a second locking mechanism matched with the dismounting shaft sleeve, the connecting shaft sleeve being used for being sleeved on the rotating shaft and capable of contacting the inner ring of the test bearing, and a loading mechanism comprising a first loading element and a second loading element arranged at the side of the rotating shaft, the first loading element being positioned in correspondence with the mounting position of the first bearing seat, and the second loading element being positioned in correspondence with the mounting position of the second bearing seat. The test device of the application is convenient in test bearing mounting and dismounting and high in efficiency.

Description

Technical Field

[0001] This invention relates to the field of bearing testing equipment technology, specifically to a testing device and method for double rolling bearings. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Rolling bearings are fundamental components of rotating machinery and among the most prone to failure in mechanical systems. Their operating condition directly impacts the reliability of the entire transmission system and even the entire machine. Therefore, conducting experiments on rolling bearings (including health condition experiments, fault condition experiments, and life test experiments) is crucial for feedback in equipment design and for guiding operation and maintenance. This device simulates specific operating conditions of rolling bearings by applying axial loads, providing key data on bearing operation and degradation, and offering a data foundation for rolling bearing design feedback, fault diagnosis, and prediction.

[0004] Patents CN202010027660.4 and CN202010786637.3 both disclose bearing testing devices, which are equipped with auxiliary bearings. The inventors found that the above-mentioned bearing testing devices apply load by directly squeezing the bearing seat, and the load is then transmitted to the auxiliary bearing, which can easily cause the auxiliary bearing to fail and reduce the reliability of the testing machine.

[0005] Patents CN202110649201.4, CN201910279061.9, and CN201911375958.8 all disclose bearing testing devices. These devices require manual hammering for installation and disassembly, or heating before installation and removal, making rapid installation and disassembly of bearings impossible. This severely impacts the efficiency of rolling bearing testing, especially batch life testing. Furthermore, the interference fit between the bearing inner ring and the drive shaft necessitates external force applied to the bearing outer ring for both installation and disassembly. The potential damage caused by this external force significantly affects the bearing's working accuracy during installation, while the disassembly process influences the degree of damage after life testing. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dual rolling bearing testing device that offers high efficiency in bearing installation and disassembly, accurate test results, avoids the failure of the accompanying bearing, and has good reliability.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] In a first aspect, embodiments of the present invention provide a dual rolling bearing testing apparatus, including a rotating shaft, and further comprising:

[0009] Disassembly and assembly mechanism: Located on one side of the end of the rotating shaft, including disassembly and assembly drive component, which is connected to disassembly and assembly bushing, which is coaxially arranged with the rotating shaft and can contact the inner ring of the test bearing;

[0010] First bearing housing and second bearing housing: can be detachably connected and both are provided with bearing mounting cavities. The first bearing housing is provided with a first locking mechanism that cooperates with the connecting bushing, and the second bearing housing is provided with a second locking mechanism that cooperates with the disassembly bushing. The connecting bushing is used to fit over the rotating shaft and can contact the inner ring of the test bearing.

[0011] Loading mechanism: includes a first loading member and a second loading member located on the side of the rotating shaft. The position of the first loading member corresponds to the installation position of the first bearing housing, and the position of the second loading member corresponds to the installation position of the second bearing housing.

[0012] Optionally, the drive shaft is connected to a test bearing, and correspondingly, the first loading member is disposed on one side of the shaft, and the second loading member is disposed on the other side of the shaft.

[0013] Optionally, the first locking mechanism includes a first slider, which is slidably connected to a first bearing housing to achieve radial movement along the first bearing housing. Correspondingly, the connecting shaft sleeve is provided with a first insertion hole that matches the first slider, and the first slider is connected to a first drive assembly mounted on the first bearing housing.

[0014] Optionally, the first driving component includes a first gear corresponding to the first slider, the first gear meshing with a rack disposed on the first slider, the first gear being rotatably connected to the first bearing housing, and a plurality of first gears meshing with a first gear ring sleeved on the outer circumference of the first bearing housing.

[0015] Optionally, the second locking mechanism includes a second slider, which is slidably connected to the second bearing housing to achieve radial movement along the second bearing housing. Correspondingly, the mounting and dismounting bushing is provided with a second insertion hole that matches the second slider, and the second slider is connected to a second drive assembly mounted on the second bearing housing.

[0016] Optionally, the second drive assembly includes a second gear corresponding to the second slider, the second gear meshing with a rack disposed on the second slider, the second gear being rotatably connected to the second bearing housing, and a plurality of second gears meshing with a second gear ring sleeved on the outer circumference of the second bearing housing.

[0017] Optionally, the end faces of the first bearing housing and the second bearing housing that are arranged opposite to each other are provided with a plurality of matching fixing plates. The fixing plates are provided with fixing holes, and the first bearing housing and the second bearing housing can be connected to the pin through the fixing holes.

[0018] Optionally, an intermediate bushing is also included for fitting onto the drive shaft and separating the test bearing inside the first and second bearing housings.

[0019] Optionally, the first loading component, the second loading component, and the disassembly / assembly drive component are all hydraulic linear drive devices, and the first loading component, the second loading component, and the disassembly / assembly drive component are all connected to the oil supply system through a reversing valve.

[0020] In a second aspect, embodiments of the present invention provide a method for testing the dual rolling bearing apparatus described in the first aspect, comprising the following steps:

[0021] The connecting bushing, the first bearing housing with the test bearing installed, and the second bearing housing with the test bearing installed are sequentially placed on the rotating shaft, and then pushed to the set position of the rotating shaft using the disassembly and assembly drive and the disassembly and assembly bushing.

[0022] The first loading element applies a load to the first bearing housing, and the second loading element applies a load to the second bearing housing to conduct a test on the bearing.

[0023] After the test is completed, the disassembly and assembly drive component pushes the disassembly and assembly bushing to correspond with the second locking mechanism. The second locking mechanism works to fix the disassembly and assembly bushing to the second bearing seat. Rotate the first bearing seat to connect the first bearing seat to the second bearing seat. The first locking mechanism works to lock and fix the connecting bushing to the first bearing seat.

[0024] During the disassembly and assembly of the drive components, the second bearing housing and the first bearing housing are pulled out. The connecting bushing transmits the pulling force to the inner ring of the test bearing. Under the action of the pulling force, the connecting bushing, the first bearing housing, the second bearing housing, and the test bearing are removed from the rotating shaft.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. The dual rolling bearing testing device of the present invention has a disassembly and assembly drive component and a disassembly and assembly bushing. When installing the test bearing, the disassembly and assembly drive component can be used to drive the disassembly and assembly bushing to move, thereby pushing the connecting bushing, two bearing seats and the test bearing to the set position of the rotating shaft. There is no need for manual installation of the test bearing to the target position, making installation convenient and quick. When disassembling, the disassembly and assembly bushing, the first bearing seat, the second bearing seat, the two test bearings and the connecting bushing are connected into a whole by the first locking mechanism and the second locking mechanism. The test bearing is pulled out by the pull-out force generated by the disassembly and assembly drive component. There is no need for manual removal of the test bearing, making disassembly convenient and quick. At the same time, a load is applied to the inner ring of the test bearing during installation and disassembly. While ensuring the accuracy of installation and disassembly, avoiding damage to the bearing due to disassembly and assembly, and ensuring the accuracy of test results, the device achieves the purpose of rapid installation and disassembly, maximizing the efficiency of bearing testing.

[0027] 2. In the dual rolling bearing test device of the present invention, the first loading member and the second loading member are arranged on both sides of the rotating shaft, so that the rotating shaft is subjected to force on both sides. While realizing the simulation of bearing heavy load conditions and life acceleration test, it avoids the load applied to the test bearing from being directly transferred to the test bearing, thereby improving the life of the test bearing and the reliability of the test bench, and avoiding the interference of the test bearing failure on the information collected from the test bearing.

[0028] 3. The dual rolling bearing testing apparatus of the present invention has a first bearing housing and a second bearing housing, enabling simultaneous testing of two bearings and achieving high efficiency in bearing life testing. Based on simulation of specific operating conditions, it simultaneously performs (accelerated) bearing life tests on two rolling bearings, thereby improving the efficiency of life testing. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the drive unit structure in Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the bearing section structure in Embodiment 1 of the present invention;

[0033] Figure 4 This is a schematic diagram of the loading mechanism structure in Embodiment 1 of the present invention;

[0034] Figure 5 This is a schematic diagram of the disassembly and assembly mechanism of Embodiment 1 of the present invention;

[0035] Figure 6 This is a schematic diagram of the bearing section structure in Embodiment 1 of the present invention;

[0036] Figure 7 This is an exploded view of the first bearing housing and the first locking mechanism in Embodiment 1 of the present invention;

[0037] Figure 8 This is a schematic diagram of the bearing housing base structure of Embodiment 1 of the present invention;

[0038] Figure 9 This is a schematic diagram of the connecting bushing structure in Embodiment 1 of the present invention;

[0039] Figure 10 This is a schematic diagram of the hydraulic circuits of the first hydraulic cylinder, the second hydraulic cylinder, and the third hydraulic cylinder in Embodiment 1 of the present invention;

[0040] The components include: 1. Drive unit; 2. Test bearing unit; 3. Test bearing unit; 4. Loading mechanism; 5. Assembly / disassembly mechanism. The components are: 1-1. Speed-regulating motor; 1-2. Coupling; 1-3. Rotating shaft; 2-1. Upper housing; 2-2. Lower housing; 2-3. First test bearing; 2-4. Second test bearing; 2-5. Left end cover of the test bearing unit; 2-6. Right end cover of the test bearing unit; 3-1. First bearing housing; 3-2. Second bearing housing; 3-3. First test bearing; 3-4. Second test bearing; 3-5. Connecting bushing; 3-5-a. First insertion hole; 3-6. Intermediate bushing; 3-1-1. Bearing housing base; 3-1-2. Test bearing housing end cover; 3-1-3. First gear ring; 3-1-4. First gear; 3-1-5. First slider, 3-1-1-a. Fixing hole, 3-1-1-b. Groove, 3-1-1-c. Annular boss, 3-1-1-d. Gear shaft, 3-1-1-e. First slide groove, 3-1-2-a. Cylindrical hole of test bearing seat end cover, 3-1-2-b. Through hole, 4-1. First hydraulic cylinder, 4-2. First connecting rod, 4-3. Second connecting rod, 4-4. Second hydraulic cylinder; 5-1. Third hydraulic cylinder, 5-2. Bushing disassembly and assembly, 5-3. Third connecting rod, 6. First three-position four-way solenoid directional valve, 7. Oil pump, 8. Second three-position four-way solenoid directional valve, 9. Pressure gauge, 10. Adjustable relief valve. Detailed Implementation

[0041] Example 1

[0042] This embodiment provides a testing apparatus for dual rolling bearings, such as... Figure 1 As shown, the device includes a base plate, a drive unit 1 mounted on the base plate, a test bearing unit 2 mounted on the shaft of the drive unit 1, a test bearing unit 3 mounted on the shaft of the drive unit, a loading mechanism 4 located on the side of the shaft, and a disassembly and assembly mechanism 5 located on the end of the shaft. The drive unit 1 and the loading mechanism 4 work together to simulate specific working conditions, such as the rolling bearing motion state or the completion of an accelerated rolling bearing life test. The disassembly and assembly mechanism 5 enables accurate and rapid disassembly and assembly of the test bearing.

[0043] like Figure 2 As shown, the drive unit 1 includes a speed-regulating motor 1-1, a rotating shaft 1-3, and a coupling 1-2. The output shaft of the speed-regulating motor 1-1 is connected to the rotating shaft 1-3 through the coupling 1-2, and can drive the rotating shaft 1-3 to rotate around its own axis.

[0044] like Figure 3 As shown, a test bearing 2 is installed on the rotating shaft 1-3. The test bearing 2 is used to support the rotating shaft and prevent the rotating shaft 1-3 from undergoing large deformation.

[0045] The test bearing section 2 includes a test bearing housing with space for installing test bearings. The test bearing housing includes an upper housing 2-1 and a lower housing 2-2. The bottom end of the lower housing 2-2 is fixedly connected to a base plate. The upper housing 2-1 is fixed to the lower housing 2-2 with bolts. A left end cover 2-5 and a right end cover 2-6 are respectively provided at the test bearing installation positions on both sides of the test bearing. A first test bearing 2-3 and a second test bearing 2-4 are installed inside the test bearing housing. The first test bearing 2-3 and the second test bearing 2-4 are axially positioned and fixed using the shoulder of the rotating shaft 1-3 and the left and right end covers 2-5 and 2-6 of the test bearing housing. The outer rings of the first test bearing 2-3 and the second test bearing 2-4 contact the inner surface of the test bearing housing. The left and right end covers 2-5 and 2-6 are fixed to the end faces of the test bearing housing with screws.

[0046] like Figure 4 As shown, the loading mechanism includes a first loading member and a second loading member. The first loading member is disposed on one side of the rotating shaft 1-3, and its axis is perpendicular to the axis of the rotating shaft 1-3. The second loading member is disposed on the other side of the rotating shaft 1-3, and its axis is perpendicular to the axis of the rotating shaft 1-3. The first loading member corresponds to the first test area on the rotating shaft 1-3, and the second loading member corresponds to the second test area on the rotating shaft 1-3, wherein the second test area is disposed near the end of the rotating shaft.

[0047] The first loading component is a first hydraulic cylinder 4-1, the piston rod of the first hydraulic cylinder 4-1 is connected to the first connecting rod 4-2, and the first hydraulic cylinder 4-1 applies load through the first connecting rod 4-1. The second loading component is a second hydraulic cylinder 4-4, the piston rod of the second hydraulic cylinder 4-4 is connected to the second connecting rod 4-3, and the second hydraulic cylinder 4-4 applies load through the second connecting rod 4-3.

[0048] The cylinder bodies of the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-4 are both fixed on the base plate.

[0049] like Figure 5 As shown, the disassembly and assembly mechanism includes a disassembly and assembly drive component, which is located on one side of the end of the rotating shaft. The disassembly and assembly drive component can output linear motion. The disassembly and assembly drive component is connected to the disassembly and assembly bushing 5-2, and the disassembly and assembly bushing 5-2 is coaxially arranged with the rotating shaft 1-3.

[0050] The disassembly and assembly drive component adopts a third hydraulic cylinder 5-1. The cylinder body of the third hydraulic cylinder 5-1 is fixed on the base plate, and its piston rod is fixed to one end of the third connecting rod 5-3. The other end of the third connecting rod 5-3 is fixed to the disassembly and assembly bushing 5-2.

[0051] like Figures 6-9As shown, the test bearing section includes a first bearing housing 3-1 and a second bearing housing 3-2. The first bearing housing 3-1 is used to fit over the first test area of ​​the rotating shaft 1-3 and to install the first test bearing 3-3. The second bearing housing 3-2 is used to fit over the second test area of ​​the rotating shaft and to install the second test bearing 3-4. The first bearing housing 3-1 and the second bearing housing 3-2 have the same structure. Taking the first bearing housing 3-1 as an example, the following description will be provided:

[0052] The first bearing housing 3-1 includes a bearing housing base 3-1-1, which adopts a cylindrical structure that matches the first test bearing 3-3. It includes an annular base plate and an arc-shaped side plate located on the outer edge of one side of the base plate. A bearing mounting cavity for installing the first test bearing is formed between the side plate and the base plate. After the first test bearing is placed into the bearing mounting cavity, its outer ring outer surface fits the inner cavity surface of the bearing mounting cavity without clearance. The other side of the base plate is provided with an annular boss 3-1-1-c and a test bearing housing end cover 3-1-2 is installed by a plurality of bolts arranged at equal intervals along the circumferential direction. The test bearing housing end cover 3-1-2 also adopts an annular structure that matches the base plate. In this embodiment, the end face of the test bearing housing end cover 3-1-2 near the bearing housing base 3-1-1 is defined as the first end face, and the end face on the other side is defined as the second end face. The first end face is in contact with the annular boss 3-1-1-c of the base plate.

[0053] A first locking mechanism is installed between the bearing housing base 3-1-1 and the test bearing housing end cover 3-1-2. The first locking mechanism is used to lock and fix the first bearing housing 3-1 to the connecting bushing 3-5. The connecting bushing 3-5 is used to fit around the outer circumference of the rotating shaft. The bottom plate of the bearing housing base can fit around the outer circumference of the connecting bushing 3-5. In this embodiment, when the first test bearing 3-3 is installed into the bearing mounting cavity of the first bearing housing 3-1 and the inner ring of the first test bearing 3-3 contacts one side of the connecting bushing 3-5, the other side of the connecting bushing 3-5 is aligned with the second end face of the test bearing end cover 3-1-2 to determine the degree of insertion of the first bearing housing 3-1 and avoid over-assembly.

[0054] The first locking mechanism includes a first slider 3-1-5. In this embodiment, multiple first sliders 3-1-5 are provided. Preferably, four first sliders 3-1-5 are provided, and the four first sliders 3-1-5 are equally spaced along the circumferential direction.

[0055] The first slider 3-1-5 adopts a cross-shaped slider, including a first slider part and a second slider part that are perpendicular to each other. The first slider adopts a cross shape and has high rigidity, shear strength and bending strength.

[0056] The first slider is divided into two parts by the second slider. One part is embedded in the first groove 3-1-1-e of the annular boss 3-1-1-c of the bearing seat base 3-1-1. The first groove 3-1-1-e is slidably connected to the annular boss 3-1-1-c. The first groove 3-1-1-e is arranged radially along the first bearing seat 3-1, so that the first slider 3-1-5 can move radially along the first bearing seat 3-1.

[0057] Correspondingly, the test bearing seat end cover 3-1-2 has a T-shaped second slide groove 3-1-2-a that matches the first slider 3-1-5 on the end face near the boss. The first slide groove and the second slide groove 3-1-2-a together form a cross-shaped slide that matches the first slider 3-1-5. The first slider 3-1-5 can move radially along the first bearing seat 3-1 within the cross-shaped slide.

[0058] The first slider 3-1-5 is connected to the first drive assembly, which can drive the first slider 3-1-5 to move radially along the first bearing seat within the cross-shaped slide.

[0059] The first driving assembly includes a first gear 3-1-4 disposed on one side of the first slider 3-1-5. A rack is disposed on the side of the second slider portion of the first slider 3-1-5 near the first gear 3-1-4. The rack matches the module of the first gear. The first gear 3-1-4 meshes with the rack of the second slider portion. The first gear 3-1-4 is rotatably connected to the gear shaft 3-1-1-d. One end of the gear shaft 3-1-1-d is fixed to the base plate, and the other end extends into the through hole 3-1-2-b of the test bearing seat end cover 3-1-2. Correspondingly, the annular protrusion of the bearing seat base 3-1-1 is provided with a notch for installing the gear shaft. The test bearing seat end cover 3-1-2 is also provided with a groove for accommodating the first gear 3-1-4, and the groove is connected to the second sliding groove 3-1-2-a, so that the first gear 3-1-4 can mesh with the first slider 3-1-5.

[0060] The outer periphery of the annular boss is provided with a first toothed ring 3-1-3. The inner ring surface of the first toothed ring 3-1-3 is a toothed surface and meshes with four first gears. The outer side of the first toothed ring 3-1-3 has a sawtooth structure to form anti-slip texture.

[0061] In this embodiment, the first gear ring 3-1-3 is floatingly connected between the bearing housing base 3-1-1 and the test bearing end cover 3-1-2. That is, the first gear ring 3-1-3 does not contact the bearing housing base 3-1-1 and the test bearing end cover 3-1-2. After rotating the first gear ring 3-1-3, it can drive the four first gears 3-1-4 to rotate, thereby driving the first slider 3-1-5 to move radially along the first bearing housing 3-1.

[0062] The outer side of the connecting bushing 3-5 is provided with a first insertion hole 3-5-a that matches the first slider 3-1-5. The first insertion hole 3-5-a is a cross-shaped hole. Since four first sliders 3-1-5 are provided, four first insertion holes 3-5-a are also provided on the connecting bushing 3-5. The end face of the connecting bushing 3-5 near the first test bearing is provided with a boss that can contact the inner ring of the first test bearing 3-3.

[0063] The outer peripheral surface of the bearing base 3-1-1 of the first bearing housing 3-1 is provided with a plurality of grooves 3-1-1-b for cooperating with the first connecting rod. The first connecting rod 4-2 can be inserted into the grooves 3-1-1-b and apply a load to the first bearing housing 3-1 through the grooves 3-1-1-b.

[0064] The structure of the second bearing housing 3-2 is the same as that of the first bearing housing 3-1, and it also includes a bearing housing base and a test bearing end cover. A second locking mechanism is provided between the bearing housing base and the bearing housing end cover. The second locking mechanism has the same structure as the first locking mechanism and includes four second sliders. The second sliders are slidably connected to the bearing housing base through a cross-shaped slide rail to achieve radial movement along the second bearing housing. The second sliders are connected to a second drive assembly. The second drive assembly includes a second gear rotatably connected to the bearing housing base. The second gear meshes with the second sliders. A second gear ring is provided on the outer periphery of the annular boss between the bearing housing base and the bearing housing end cover. The inner ring surface of the second gear ring meshes with the four second gears. Rotating the second gear ring can drive the four second gears to rotate, thereby driving the four second sliders to move radially along the second bearing housing.

[0065] Correspondingly, the outer circumferential surface of the disassembly and assembly bushing 5-2 is provided with four second insertion holes. The four second insertion holes are equally spaced along the circumferential direction. The second insertion holes are cross-shaped insertion holes that match the second slider. The disassembly and assembly bushing can be locked and fixed to the second bearing seat through the second insertion holes and the second slider.

[0066] The disassembly and assembly bushing adopts a tubular structure that matches the rotating shaft. One end of it is fixedly connected to the third connecting rod 5-3 by a thread, and the other end face is provided with an annular boss. The annular boss matches the inner ring of the second test bearing 3-4 and can contact the end face of the inner ring of the second test bearing 3-4.

[0067] The disassembly and assembly bushing 5-2 is provided with a vent hole to facilitate the intake and exhaust of gas in the internal cavity of the disassembly and assembly bushing 5-2.

[0068] In this embodiment, the outer diameter of the disassembly sleeve 5-2 is the same as that of the connecting sleeve 3-5, and it can extend into the interior of the annular base plate of the second bearing seat, so that the second insertion hole is aligned with the cross-shaped slide of the second bearing seat.

[0069] The first bearing housing 3-1 has a test bearing end cover 3-1-2 installed at one end of the bearing housing base 3-1-1, and a plurality of first fixing plates provided on the other end face. The second bearing housing 3-2 has a test bearing end cover installed at one end of the bearing housing base, and a plurality of second fixing plates matching the first fixing plates provided on the other end face. Both the first fixing plates and the second fixing plates are provided with matching fixing holes 3-1-1-a. After the first fixing plates and the second fixing plates are attached together and the fixing holes are aligned, a pin is inserted to realize the connection between the first bearing housing 3-1 and the second bearing housing.

[0070] The first bearing housing 3-1 and the second bearing housing 3-2 in this embodiment have simple structures, providing ample space for potential experimental measurement equipment such as acoustic emission sensors and vibration sensors.

[0071] The test apparatus also includes an intermediate bushing 3-6, the outer diameter of which is smaller than the outer diameter of the inner ring of the test bearing, so that it can contact the inner rings of the two test bearings. The intermediate bushing 3-6 is used to fit around the outer circumference of the shaft to separate the two test bearings.

[0072] In this embodiment, as Figure 10 As shown, the first hydraulic cylinder 4-1, the second hydraulic cylinder 4-4, and the third hydraulic cylinder 5-1 are all connected to the oil supply mechanism through a reversing valve. Specifically, the reversing valve is a three-position four-way solenoid reversing valve. The first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-2 are connected to the oil pump 7 through the first three-position four-way solenoid reversing valve 6. The oil pump 6 is connected to the oil tank. The oil pump 6 is also connected to the third hydraulic cylinder through the second three-position four-way solenoid reversing valve 8. A pressure gauge 9 and an adjustable relief valve 10 are also installed at the oil outlet of the oil pump 6 to control the oil supply pressure.

[0073] The first three-position four-way solenoid directional valve 6 can control the oil supply and return of the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-2, thereby controlling the loading and unloading of the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-2. The second three-position four-way solenoid directional valve 8 can control the oil supply and return of the third hydraulic cylinder 5-1, thereby controlling the movement of the disassembly and assembly bushing 5-2.

[0074] Example 2

[0075] This embodiment provides a method for testing the double rolling bearing as described in Embodiment 1, including the following steps:

[0076] Step 1: Place the first test bearing 3-3 into the bearing mounting cavity of the first bearing housing 3-1 beforehand, and place the second test bearing 3-4 into the bearing mounting cavity of the second bearing housing 3-2.

[0077] The connecting sleeve is placed on the rotating shaft, and the first bearing housing 3-1 and the first test bearing 3-3 are placed on the rotating shaft 1-3. The third hydraulic cylinder 5-1 is activated, and the sleeve 5-2 is disassembled and contacts the inner ring of the first test bearing 3-3. The third hydraulic cylinder 5-1 is used to push the first bearing housing 3-1, the first test bearing 3-3 and the connecting sleeve 3-5 to the first test area of ​​the rotating shaft 1-3. One end of the connecting sleeve 3-5 is limited by the shoulder of the rotating shaft 1-3, and the annular boss at the other end contacts the inner ring of the first test bearing 3-3.

[0078] Place the intermediate bushing 3-6 onto the rotating shaft, and then use the disassembly and assembly bushing 5-2 to push the intermediate bushing 3-6 until it contacts the inner ring of the first test bearing 3-3.

[0079] Then, the second bearing housing 3-2 and the second test bearing sleeve 3-4 are placed on the rotating shaft 1-3. The second bearing housing 3-2 and the second test bearing 3-4 are pushed to the second test area of ​​the rotating shaft using the disassembly and assembly bushing 5-2, wherein the inner ring of the second test bearing 3-4 contacts the intermediate bushing 3-6.

[0080] In this embodiment, the third hydraulic cylinder 5-1 provides the thrust for installing the two test bearings, eliminating the need for manual hammering or heating of the test bearings, making it convenient and quick. Furthermore, the annular boss at the end of the disassembly and assembly bushing contacts the inner ring of the test bearing, avoiding damage to the test bearings caused by applying force to the outer ring of the test bearing during installation.

[0081] Step 2: Start the speed-regulating motor 1-1 to control the first three-position four-way solenoid valve 6 to work, so that the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-4 simultaneously receive oil, which pushes the first connecting rod 4-2 and the second connecting rod 4-3 to work, applying load to the first bearing housing 3-1 and the second bearing housing 3-2. Since the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-2 are located on both sides of the rotating shaft 1-3, the two sides of the rotating shaft 1-3 are subjected to force. While realizing the simulation of the bearing heavy load condition and the life acceleration experiment, it avoids the load applied to the test bearing from being directly transferred to the test bearing, improves the life of the test bearing and the reliability of the test bench, and avoids the interference of the test bearing failure on the information collected from the test bearing.

[0082] After the test is completed, the first three-position four-way solenoid directional valve 6 is controlled to work, so that the first hydraulic cylinder 4-1 and the second hydraulic cylinder 4-2 return oil at the same time, the first connecting rod 4-2 and the second connecting rod 4-3 retract, unloading the first bearing seat 3-1 and the second bearing seat 3-2, and shutting off the speed regulating motor 1-1.

[0083] Step 3: Control the second three-position four-way solenoid directional valve 8 to work, control the third hydraulic cylinder 5-1 to work, insert the disassembly and assembly bushing 5-2 into the annular base plate of the second bearing seat 3-2, rotate the second bearing seat 3-2 so that the cross-shaped slide of the second bearing seat 3-2 is aligned with the corresponding cross-shaped second insertion hole on the disassembly and assembly bushing 5-2, and then rotate the second gear ring so that part of the second slider is inserted into the second insertion hole, thereby achieving the locking of the disassembly and assembly bushing 5-2 and the second bearing seat 3-2;

[0084] Rotate the first bearing seat 3-1 so that the first fixing plate of the first bearing seat 3-1 and the second fixing plate of the second bearing seat 3-2 fit together, and insert the pin into the first fixing hole and the second fixing hole to realize the connection between the first bearing seat 3-1 and the second bearing seat 3-2.

[0085] Rotate the shaft 1-3 so that the cross-shaped first insertion hole 3-5-a on the connecting bushing 3-5 is aligned with the cross-shaped slide of the first bearing seat 3-1. Then rotate the first gear ring 3-1-3 to drive the first slider 3-1-5 part to be inserted into the first insertion hole 3-5-a, thereby fixing the first bearing seat 3-1 and the connecting bushing 3-5.

[0086] In this embodiment, in order to facilitate the cooperation between the connecting bushing 3-5 and the first locking mechanism, reference lines are provided on the connecting bushing 3-5 and the first bearing seat 3-1. In order to facilitate the disassembly and assembly of the bushing 5-2 and the cooperation with the second locking mechanism, reference lines are provided on the disassembly and assembly bushing 5-2 and the second bearing seat 3-2.

[0087] Step 4: The second three-position four-way solenoid directional valve 8 operates, driving the third hydraulic cylinder 5-1 to operate. The third connecting rod 5-3 retracts, and the disassembly and assembly bushing 5-2 provides a pulling force to the second bearing housing 3-2 through the second slider. The second bearing housing transmits the pulling force to the first bearing housing 3-1, and the first bearing housing 3-1 transmits the pulling force to the connecting bushing 3-5 through the first slider 3-1-5. The connecting bushing 3-5 applies a load to the inner ring of the first test bearing 3-3, and the first test bearing 3-3 applies a load to the second test bearing 3-4 through the intermediate bushing 3-6. This pulls the first test bearing 3-3, the connecting bushing 3-5, the first bearing housing 3-1, the intermediate bushing 3-6, the second bearing housing 3-2, and the second test bearing 3-4 from the rotating shaft 1-3, thus achieving the disassembly of the two test bearings.

[0088] The test bearing is pulled out by the pulling force generated by the third hydraulic cylinder 5-1, eliminating the need for manual removal. This makes disassembly convenient and quick. At the same time, a load is applied to the inner ring of the test bearing during disassembly, ensuring disassembly accuracy, avoiding damage to the test bearing during disassembly and assembly, and ensuring the accuracy of test results. This achieves the goal of rapid installation and disassembly, maximizing the efficiency of bearing testing.

[0089] The test apparatus in this embodiment can test two bearings simultaneously, resulting in high efficiency in bearing life testing. Based on simulations of specific operating conditions, it simultaneously performs (accelerated) bearing life tests on two rolling bearings, thus improving the efficiency of life testing.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A testing device for double rolling bearings, comprising a rotating shaft, characterized in that, Also includes: Disassembly and assembly mechanism: Located on one side of the end of the rotating shaft, including disassembly and assembly drive component, which is connected to disassembly and assembly bushing, which is coaxially arranged with the rotating shaft and can contact the inner ring of the test bearing; First bearing housing and second bearing housing: can be detachably connected and both are provided with bearing mounting cavities. The first bearing housing is provided with a first locking mechanism that cooperates with the connecting bushing, and the second bearing housing is provided with a second locking mechanism that cooperates with the disassembly bushing. The connecting bushing is used to fit over the rotating shaft and can contact the inner ring of the test bearing. Loading mechanism: includes a first loading member and a second loading member located on the side of the rotating shaft. The position of the first loading member corresponds to the installation position of the first bearing housing, and the position of the second loading member corresponds to the installation position of the second bearing housing. The first locking mechanism includes a first slider, which is slidably connected to a first bearing seat to achieve radial movement along the first bearing seat. Correspondingly, the connecting shaft sleeve is provided with a first insertion hole that matches the first slider, and the first slider is connected to a first drive assembly installed in the first bearing seat. The first driving component includes a first gear corresponding to the first slider, the first gear meshing with a rack provided on the first slider, the first gear being rotatably connected to a first bearing seat, and a plurality of first gears meshing with a first gear ring sleeved on the outer circumference of the first bearing seat; The second locking mechanism includes a second slider, which is slidably connected to a second bearing seat to achieve radial movement along the second bearing seat. Correspondingly, the disassembly and assembly bushing is provided with a second insertion hole that matches the second slider, and the second slider is connected to a second drive assembly installed in the second bearing seat. The second drive assembly includes a second gear corresponding to the second slider, the second gear meshing with a rack provided on the second slider, the second gear being rotatably connected to the second bearing housing, and a plurality of second gears meshing with a second gear ring sleeved on the outer circumference of the second bearing housing.

2. The dual rolling bearing testing apparatus as described in claim 1, characterized in that, The rotating shaft is connected to a test bearing. Accordingly, the first loading member is located on one side of the rotating shaft, and the second loading member is located on the other side of the rotating shaft.

3. The dual rolling bearing testing apparatus as described in claim 1, characterized in that, The first bearing housing and the second bearing housing are provided with a plurality of matching fixing plates on their opposite end faces. The fixing plates are provided with fixing holes, and the first bearing housing and the second bearing housing can be connected to the pin through the fixing holes.

4. The dual rolling bearing testing apparatus as described in claim 1, characterized in that, It also includes an intermediate bushing for fitting onto the drive shaft and separating the test bearings inside the first and second bearing housings.

5. The dual rolling bearing testing apparatus as described in claim 1, characterized in that, The first loading component, the second loading component, and the disassembly and assembly drive component all adopt hydraulic linear drive equipment, and the first loading component, the second loading component, and the disassembly and assembly drive component are all connected to the oil supply system through a reversing valve.

6. A method for testing a double rolling bearing according to any one of claims 1-5, characterized in that, Includes the following steps: The connecting bushing, the first bearing housing with the test bearing installed, and the second bearing housing with the test bearing installed are sequentially placed on the rotating shaft, and then pushed to the set position of the rotating shaft using the disassembly and assembly drive and the disassembly and assembly bushing. The first loading element applies a load to the first bearing housing, and the second loading element applies a load to the second bearing housing to conduct a test on the bearing. After the test is completed, the disassembly and assembly drive component pushes the disassembly and assembly bushing to correspond with the second locking mechanism. The second locking mechanism works to fix the disassembly and assembly bushing to the second bearing seat. Rotate the first bearing seat to connect the first bearing seat to the second bearing seat. The first locking mechanism works to lock and fix the connecting bushing to the first bearing seat. During the disassembly and assembly of the drive components, the second bearing housing and the first bearing housing are pulled out. The connecting bushing transmits the pulling force to the inner ring of the test bearing. Under the action of the pulling force, the connecting bushing, the first bearing housing, the second bearing housing, and the test bearing are removed from the rotating shaft.

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