Sliding bearing simulation loading device

Abstract

A sliding bearing simulation loading device disclosed by the present invention comprises a base station used for supporting a to-be-tested bearing, the base station is provided with a load simulation structure used for simulating the dynamic load borne by the to-be-tested bearing during use, the load simulation structure comprises two groups of positioning seats fixedly connected to the base station, and a horizontal seat freely moving in the horizontal transverse direction is arranged between the two groups of positioning seats. The co-position seat is further provided with a shaft matching assembly for driving the axial column to be assembled with the to-be-tested bearing, the horizontal position seat is provided with a cut-off assembly for limiting the horizontal position of the co-position seat and driving the axial column to rotate, and the co-position seat is provided with a variable-pitch assembly for adjusting the horizontal distance between the balancing weight and the to-be-tested bearing. Through the eccentric arrangement of the balancing weight and the dynamic adjustment of the variable pitch assembly, the radial load which changes periodically can be simulated, and the design can truly reflect the complex working conditions possibly encountered in the actual operation of the sliding bearing, so that the performance of the sliding bearing under the load condition can be evaluated more comprehensively.

Description

Technical Field

[0001] The invention relates to the technical field of bearing loading devices, in particular to a sliding bearing simulation loading device. Background Art

[0002] Sliding bearings are the most common and basic supporting and transmission system components used in various mechanical devices. Their performance directly affects the working condition, reliability and durability of the mechanical devices. The sliding bearing test bench is an important way and device to test whether the sliding bearings meet the working conditions. Through the test of the simulated loading device, the performance of the sliding bearings can be tested and evaluated, and the influence of various factors can be studied.

[0003] Chinese patent (publication number: CN115876469B), the solution specifically includes a sliding bearing, a sliding bearing installation system, a radial loading system, an axial and bending moment loading system, a spindle and a spindle support system; the spindle support system is used to support the spindle and limit the spindle to a single degree of freedom state in which it can move in the direction of rotation; the spindle outer sleeve is provided with a sliding bearing, and the spindle supports the sliding bearing; the sliding bearing is fitted in the sliding bearing installation system; the radial loading system is used to apply force to the sliding bearing installation system so that the sliding bearing installation system applies radial force to the sliding bearing; the axial and bending moment loading system is used to apply two axial forces with variable directions to the sliding bearing installation system, and the two axial forces are symmetrical about the axis of the spindle, thereby effectively solving the problem that a simulation loading device cannot realize multiple loading functions during testing and thus truly simulate the loading conditions and complex structure of the sliding bearing.

[0004] In the actual application of sliding bearings, the shafts matched therewith are often affected by a variety of complex working conditions, such as periodically changing radial loads, shaft misalignment, eccentric motion and dynamic imbalance, etc. These factors have a significant impact on the performance and life of sliding bearings. However, the sliding bearing simulation loading device in the above patent still has certain limitations when simulating these complex working conditions. Although the existing device can simulate different loads, it is still not accurate enough in dynamically simulating shaft misalignment, eccentric motion and periodically changing radial loads. It is difficult to truly reproduce the periodically changing radial loads, and thus it is difficult to comprehensively and accurately evaluate the performance of sliding bearings. Therefore, a sliding bearing simulation loading device is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a sliding bearing simulation loading device, which has the advantage of being able to simulate periodically changing radial loads, and solves the problem that it is difficult to truly reproduce periodically changing radial loads, thereby making it difficult to comprehensively and accurately evaluate the performance of sliding bearings.

[0006] To achieve the above object, the present invention provides the following technical solutions: a sliding bearing simulation loading device, comprising a base for supporting a bearing to be tested, wherein the base is provided with a simulated load structure for simulating the dynamic load to which the bearing to be tested is subjected during use; The simulated load structure comprises two sets of positioning seats fixedly connected to the base, a horizontal seat freely moving in the horizontal direction is arranged between the two sets of positioning seats, and a co-position seat moving synchronously with the horizontal seat is arranged on the co-position seat, an axial column freely rotating in the vertical direction is arranged on the co-position seat, and a shaft matching component driving the axial column to assemble with the bearing to be tested is also arranged on the co-position seat; The horizontal seat is provided with a cut-off assembly for limiting the horizontal position of the equiposition seat and driving the axial column to rotate after the axial column and the bearing to be tested are assembled. The axial column includes an integrally formed forward spline portion and a rearward spline portion. The rearward spline portion is provided with a counterweight block that rotates synchronously therewith, and the equiposition seat is provided with a variable distance assembly for adjusting the horizontal distance between the counterweight block and the bearing to be tested.

[0007] Preferably, the shaft matching component comprises a positioning spline cylinder sleeved on the outer ring of the forward spline part, the positioning spline cylinder is fixedly rotated on the same position seat, and the same position seat is provided with a circular groove for the axial column to slide through, and the positioning spline cylinder is fixedly connected with a plurality of guide rods, and the guide rod is provided with a plurality of inner arc plates that synchronously approach or move away from the axial column on the side facing the bearing to be tested; The axial column is coaxially arranged with a bearing bush integrally formed on the bearing to be tested, and a plurality of groups of inner arc plates are in contact connection with the inner wall of the bearing bush.

[0008] Preferably, the inner arc plates of the plurality of groups are fixedly connected to a block on one side facing the axial column, and the block is provided with a directional swing rod and a dynamic swing rod which are horizontally symmetrically distributed, and the two ends of the directional swing rod are respectively fixedly rotated on the guide rod and the block, and the two ends of the dynamic swing rod are respectively fixedly rotated on the block and the axial column; One end of the axial column facing the bearing to be tested includes an integrally formed end ball portion.

[0009] Preferably, the interception and opening assembly comprises a threaded rod driven by a motor to rotate freely in a vertical direction, the two ends of the threaded rod are respectively fixedly rotated on a group of positioning seats, an internal threaded cylinder is threadedly connected to the threaded rod, and the internal threaded cylinder is fixedly rotated on a level seat; The internal threaded barrel does not rotate synchronously with the threaded rod in the initial state, and a locking assembly is provided on the leveling seat to drive the internal threaded barrel and the threaded rod to rotate synchronously. A guide column is fixedly connected to the positioning seat, and the guide column slides through the leveling seat; The threaded rod is sleeved with a driving wheel, and the driving wheel is coaxially fixed with the internal threaded cylinder. The positioning spline cylinder is fixedly sleeved with a driven wheel, and the flat seat is provided with a belt for transmitting the driven wheel and the driving wheel.

[0010] Preferably, the locking assembly comprises an inner sealing plate arranged on the flat seat, an inner cavity groove for sliding connection of the inner sealing plate is provided on the flat seat, a locking groove for matching with the inner sealing plate is provided at the position of the inner threaded tube corresponding to the inner sealing plate, a return spring is provided in the inner cavity groove, and two ends of the return spring are respectively fixedly connected to the inner sealing plate and the flat seat; The horizontal seat is provided with a groove body for the horizontal sliding of the same seat, the inner sealing plate is fixedly connected with a positioning pin on the side facing the same seat, the same seat is provided with a V-shaped adjustment groove for the sliding connection of the positioning pin, and the same seat is provided with a yielding groove for the positioning pin to slide through; The V-shaped positioning groove includes an integrally formed oblique groove portion and a horizontal groove portion.

[0011] Preferably, a baffle is provided on a side of the bearing to be tested away from the flat seat, and the baffle is fixedly connected to the base and corresponds to the end ball portion.

[0012] Preferably, the pitch-changing assembly includes a transverse slide seat that freely moves in the horizontal direction, and the co-position seat includes an integrally formed extension portion, and the extension portion is provided with a second groove body for the transverse slide seat to be slidably connected; The sliding sleeve on the rear spline part is provided with a shift spline cylinder, the counterweight block is fixedly connected to the outer peripheral surface of the shift spline cylinder, the fixed sleeve on the shift spline cylinder is provided with two groups of retaining rings, and the sliding sleeve on the shift spline cylinder is provided with a clamping ring, the clamping ring is located between the two groups of retaining rings and is in sliding contact with the opposite surfaces of the two groups of retaining rings, and the clamping ring is fixedly connected to the transverse sliding seat.

[0013] Preferably, the extension portion is fixedly connected with two groups of baffles, both of which are sleeved on the rearward spline portion, and a worm is slidably sleeved on the rearward spline portion, the worm is in sliding contact with the two groups of baffles, the worm is meshingly connected with a worm wheel, and the worm wheel is fixedly rotated on the extension portion; A connecting rod is arranged on the worm wheel for fixed axis rotation, and one end of the connecting rod away from the worm wheel is arranged for fixed axis rotation on a transverse sliding seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can simulate periodically changing radial loads by setting a pseudo-load structure, eccentrically setting the counterweight block, and dynamically adjusting the pitch-changing assembly. This design can truly reflect the complex working conditions that the sliding bearing may encounter in actual operation, such as shaft misalignment, eccentric motion, and dynamic imbalance, and thus more comprehensively evaluate the performance of the sliding bearing under load conditions.

[0015] 2. The present invention can accurately complete the assembly process of the axial column and the bearing to be tested by setting the shaft matching assembly, ensuring the coaxiality and matching accuracy between the two. The load deviation caused by assembly error can be avoided through a high-precision assembly method, thereby improving the accuracy of the test results.

[0016] 3. The present invention can adjust the size and distribution of the radial load by changing the position, mass and initial spacing of the counterweight. This adjustability enables the device to adapt to sliding bearings of different sizes and load-bearing capacities and meet diverse testing needs. At the same time, it can simulate a variety of complex dynamic working conditions, including dynamic changes in centrifugal loads, axial loads and radial loads. This versatility makes the device not only suitable for performance testing of sliding bearings, but also for studying the adaptability of lubrication systems, bearing life evaluation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the components where the level seat of the present invention is located; Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the components where the counterweight block of the present invention is located; Figure 5 This is a schematic diagram of the components where the inner arc plate of the present invention is located; Figure 6 This is a schematic diagram of the component where the axial column of the present invention is located; Figure 7 This is a schematic diagram of the components where the inner sealing plate of the present invention is located; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Fig. 9 For the present invention Figure 6 Enlarged view of point C in the middle; Fig.10 It is a schematic diagram of the components where the transverse slide seat of the present invention is located.

[0018] In the figure: 1, base; 2, bearing to be tested; 3, positioning seat; 4, baffle; 5, threaded rod; 6, internal threaded cylinder; 7, flat seat; 8, guide column; 9, inner sealing plate; 10, clamping groove; 11, return spring; 12, same position seat; 121, extension; 13, positioning pin; 14, V-shaped adjustment groove; 141, horizontal groove; 15, axial column; 151, forward spline portion; 152, Rear spline part; 153, end ball part; 16, positioning spline cylinder; 17, driven wheel; 18, guide rod; 19, driving wheel; 20, bracket block; 21, directional rocker; 22, dynamic rocker; 23, inner arc plate; 24, worm; 25, baffle plate; 26, worm wheel; 27, connecting rod; 28, transverse slide; 29, retaining ring; 30, displacement spline cylinder; 31, retaining ring; 32, counterweight block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 10 , the present invention provides a technical solution: a sliding bearing simulation loading device, comprising a base 1 for supporting a bearing 2 to be tested, wherein the base 1 is provided with a simulated load structure for simulating the dynamic load to which the bearing 2 to be tested is subjected during use; The simulated load structure comprises two sets of positioning seats 3 fixedly connected to the base 1, a horizontal seat 7 freely moving in the horizontal direction is arranged between the two sets of positioning seats 3, and a corresponding seat 12 moving synchronously therewith is arranged on the horizontal seat 7, an axial column 15 freely rotating in the vertical direction is arranged on the corresponding seat 12, and a shaft matching component driving the axial column 15 to assemble with the bearing 2 to be tested is also arranged on the corresponding seat 12; The horizontal seat 7 is provided with a cut-off assembly for limiting the horizontal position of the equiposition seat 12 and driving the axial column 15 to rotate after the axial column 15 and the bearing 2 to be tested are assembled. The axial column 15 includes an integrally formed forward spline portion 151 and a rearward spline portion 152, and the rearward spline portion 152 is provided with a counterweight block 32 that rotates synchronously therewith, and the equiposition seat 12 is provided with a variable pitch assembly for adjusting the horizontal spacing between the counterweight block 32 and the bearing 2 to be tested. The simulated load structure includes two groups of positioning seats 3 fixedly connected to the base 1, and a horizontal seat 7 that can move freely in the horizontal lateral direction is provided between the two groups of positioning seats 3, and the horizontal seat 7 is provided with an equiposition seat 12 that moves synchronously therewith, and the equiposition seat 12 is provided with an axial column 15 that can rotate freely in the vertical direction, and the equiposition seat 12 is also provided with an axial matching assembly that drives the axial column 15 to be assembled with the bearing 2 to be tested; The horizontal seat 7 is provided with a cut-off assembly for limiting the horizontal position of the equiposition seat 12 and driving the axial column 15 to rotate after the axial column 15 and the bearing 2 to be tested are assembled. The axial column 15 includes an integrally formed forward spline portion 151 and a rearward spline portion 152, and the rearward spline portion 152 is provided with a counterweight block 32 that rotates synchronously therewith, and the equiposition seat 12 is provided with a variable pitch assembly for adjusting the horizontal spacing between the counterweight block 32 and the bearing 2 to be tested. The simulated load structure includes two groups of positioning seats 3 fixedly connected to the base 1, and a horizontal seat 7 that can move freely in the horizontal lateral direction is provided between the two groups of positioning seats 3, and the horizontal seat 7 is provided with an equiposition seat 12 that moves synchronously therewith, and the equiposition seat 12 is provided with an axial column 15 that can rotate freely in the vertical direction, and the equiposition seat 12 is also provided with an axial matching assembly that drives the axial column 15 to be assembled with the bearing 2 to be tested; The horizontal seat 7 is provided with a shut-off assembly for limiting the horizontal position of the equiposition seat 12 and driving the axial column 15 to rotate after the axial column 15 and the bearing 2 to be tested are assembled. The axial column 15 includes an integrally formed forward spline portion 151 and a rearward spline portion 152. The rearward spline portion 152 is provided with a counterweight block 32 that rotates synchronously therewith, and the equiposition seat 12 is provided with a variable distance assembly for adjusting the horizontal distance between the counterweight block 32 and the bearing 2 to be tested.

[0021] like Figure 1 and Figure 2 As shown, when the simulated load is applied to the bearing 2 to be tested, the base of the bearing 2 to be tested is detachably connected to the base 1 by bolts, and the bearing shell in the bearing 2 to be tested is driven to be coaxial with the axial column 15. The axial matching components arranged on the coaxial seat 12 can accurately complete the assembly process of the axial column 15 and the bearing 2 to be tested. This assembly method can ensure the coaxiality and matching accuracy between the axial column 15 and the bearing 2 to be tested, so that in the subsequent loading test, the load can be accurately applied to the bearing 2 to be tested, avoiding load deviation caused by assembly errors.

[0022] At the same time, when the axial column 15 and the bearing 2 to be tested are assembled, driven by the cut-off assembly, the level seat 7 stops moving in the horizontal direction and can drive the axial column 15 to rotate in the vertical direction, so that through the rotation process of the axial column 15, a load is applied to the axial column 15 to simulate the load on the bearing 2 to be tested when in use.

[0023] Among them, the axial column 15 is provided with an eccentrically arranged counterweight block 32 that rotates synchronously therewith. In actual use, for sliding bearings of different sizes and load-bearing capacities, the size and distribution of the radial load can be changed by adjusting the position of the counterweight block 32, thereby effectively simulating the stress conditions of the bearing 2 to be tested under rotational imbalance conditions, such as radial vibration and dynamic load caused by unbalanced mass in high-speed rotating machinery.

[0024] Moreover, driven by the variable pitch component, the horizontal position of the counterweight block 32 changes back and forth within a certain range, that is, the horizontal spacing between the counterweight block 32 and the bearing 2 to be tested is reciprocated, so that by dynamically adjusting the spacing between the counterweight block 32 and the bearing 2 to be tested, the radial load variation of the bearing 2 to be tested at different axial positions can be simulated, and thus it can more realistically reflect the complex working conditions that the bearing 2 to be tested may encounter in actual operation, such as shaft misalignment, eccentric motion, and dynamic imbalance, and the initial spacing between the counterweight block 32 and the bearing 2 to be tested or the mass of the counterweight block 32 can be changed to adjust the size and distribution of the radial load, so as to test the performance of the bearing 2 to be tested under different load conditions, such as load-bearing capacity, lubrication effect, and stability.

[0025] It should be noted that during the test process, the working status of the bearing 2 to be tested (such as oil film pressure, temperature, vibration, etc.) is monitored in real time by sensors, and the spacing of the counterweight blocks 32 is dynamically adjusted according to the monitoring data. This can achieve an accurate evaluation of the performance of the bearing 2 to be tested, which in turn helps to optimize the test process and avoid damage to the bearing 2 to be tested due to overload or imbalance.

[0026] In one of the more preferred embodiments, the shaft matching assembly includes a positioning spline cylinder 16 sleeved on the outer ring of the forward spline portion 151, the positioning spline cylinder 16 is fixedly rotated on the same position seat 12, and the same position seat 12 is provided with a circular groove for the axial column 15 to slide through, and the positioning spline cylinder 16 is fixedly connected to a plurality of guide rods 18, and the guide rods 18 are provided with a plurality of inner arc plates 23 that are synchronously close to or away from the axial column 15 on the side facing the bearing 2 to be tested; The axial column 15 is coaxially arranged with the bearing bush integrally formed on the bearing to be tested 2, and the plurality of sets of inner arc plates 23 are in contact connection with the inner wall of the bearing bush.

[0027] The multiple groups of inner arc plates 23 are fixedly connected to the side of the axial column 15 with an armature block 20, and the armature block 20 is provided with a directional rocker 21 and a dynamic rocker 22 which are horizontally symmetrically distributed. The two ends of the directional rocker 21 are respectively rotated on the guide rod 18 and the armature block 20, and the two ends of the dynamic rocker 22 are respectively rotated on the armature block 20 and the axial column 15. The end of the axial column 15 facing the bearing 2 to be tested includes an integrally formed end ball portion 153.

[0028] A baffle plate 4 is disposed on a side of the bearing 2 to be tested away from the level seat 7 . The baffle plate 4 is fixedly connected to the base 1 and corresponds to the end ball portion 153 .

[0029] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the isostatic seat 12 moves synchronously in the horizontal direction with the level seat 7, and can then drive the axial column 15 arranged thereon to move synchronously in the horizontal direction. When the end ball portion 153 integrally formed at the end of the axial column 15 conflicts with the baffle 4, the axial column 15 cannot continue to move in the horizontal direction. At this time, the level seat 7 and the isostatic seat 12 still move horizontally, thereby driving the axial column 15 and the isostatic seat 12 to slide relative to each other.

[0030] At the same time, the positioning spline cylinder 16 rotates on the same position seat 12, and the positioning spline cylinder 16 is fixed to the multiple groups of guide rods 18. The positioning spline cylinder 16 continues to move horizontally following the same position seat 12, but the axial column 15 cannot continue to move horizontally due to the restriction of the baffle 4, thereby driving the distance between the guide rod 18 and the end ball portion 153 to become smaller. In this process, multiple groups of directional rocker arms 21 and dynamic rocker arms 22 arranged in the middle of the two can be driven to deflect synchronously to increase the distance between the engagement block 20 arranged in the middle of the directional rocker arm 21 and the dynamic rocker arm 22 and the axial column 15, thereby prompting multiple groups of inner arc plates 23 to be able to move away from the axial column 15 synchronously until multiple groups of axial columns 15 are in contact with the inner wall of the bearing.

[0031] It should be noted that a torsion spring is provided on the engagement block 20 to drive the directional rocker arm 21 and the dynamic rocker arm 22 to return to the initial deflected state. The torsion spring is an existing device and a technical means well known to those skilled in the art, so it is not shown in the figure. By setting up multiple sets of torsion springs, the initial spacing between the multiple sets of inner arc plates 23 and the axial column 15 can be ensured to ensure that the end ball portion 153 can extend into the bearing shell when it does not conflict with the baffle 4. At the same time, the setting of multiple sets of torsion springs can limit the initial positions of the axial column 15 and the isotropic seat 12 to ensure that the axial column 15 does not slide arbitrarily on the isotropic seat 12.

[0032] Subsequently, the positioning spline cylinder 16 is driven to rotate to drive the multiple groups of guide rods 18 arranged thereon to rotate, and then the multiple groups of directional rocker arms 21, dynamic rocker arms 22 and inner arc plates 23 are driven to rotate synchronously to simulate the motion state of the shaft that cooperates with the bearing 2 to be tested during actual use. It should be noted that in actual use, the bearing shells of the bearings 2 to be tested of different specifications have different sizes and curvatures. Therefore, the engagement block 20 and the inner arc plate 23 are detachably connected by bolts, and then the corresponding inner arc plate 23 is adaptively replaced according to the specifications of the bearing 2 to be tested.

[0033] Based on the embodiment of the shaft matching assembly, the cut-off assembly includes a threaded rod 5 driven by a motor to rotate freely in the vertical direction, and the two ends of the threaded rod 5 are respectively fixedly rotated on a group of positioning seats 3, and the threaded rod 5 is threadedly connected with an internal threaded tube 6, and the internal threaded tube 6 is fixedly rotated on a level seat 7; The internal threaded barrel 6 does not rotate synchronously with the threaded rod 5 in the initial state, and a locking assembly is provided on the leveling seat 7 to drive the internal threaded barrel 6 and the threaded rod 5 to rotate synchronously. A guide column 8 is fixedly connected to the positioning seat 3, and the guide column 8 slides through the leveling seat 7; The threaded rod 5 is sleeved with a driving wheel 19, and the driving wheel 19 is coaxially fixed with the internal threaded tube 6. The positioning spline tube 16 is fixedly sleeved with a driven wheel 17, and the level seat 7 is provided with a belt for transmitting the driven wheel 17 and the driving wheel 19. The internal threaded tube 6 does not rotate synchronously with the threaded rod 5 in the initial state, and the level seat 7 is provided with a locking assembly that drives the internal threaded tube 6 and the threaded rod 5 to rotate synchronously. The positioning seat 3 is fixedly connected with a guide column 8, and the guide column 8 slides through the level seat 7; The threaded rod 5 is sleeved with a driving wheel 19, and the driving wheel 19 is coaxially fixed with the internal threaded cylinder 6. The positioning spline cylinder 16 is fixedly sleeved with a driven wheel 17, and the flat seat 7 is provided with a belt for transmitting the driven wheel 17 and the driving wheel 19.

[0034] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the threaded rod 5 is driven to rotate in the vertical direction by a motor fixed on the positioning seat 3, wherein the threaded rod 5 is threadedly matched with an internal threaded tube 6, and in the initial state, the internal threaded tube 6 is restricted by the leveling seat 7 and will not rotate synchronously with the threaded rod 5. At the same time, the leveling seat 7 is slidably sleeved on the guide column 8, and the guide column 8 and the threaded rod 5 are arranged in parallel, so that when the threaded rod 5 rotates, the guide column 8 can drive the same position seat 12 thereon to move synchronously in the horizontal direction.

[0035] At the same time, driven by the locking assembly, the horizontal seat 7 can release the restriction on the internal threaded tube 6. At this time, the horizontal position of the horizontal seat 7 will no longer change, and the internal threaded tube 6 can rotate with the threaded rod 5, and then the internal threaded tube 6 drives the driving wheel 19 coaxially arranged therewith to rotate, and the belt arranged between the driving wheel 19 and the driven wheel 17 drives the driven wheel 17 to rotate, and the driven wheel 17 is fixedly set on the positioning spline tube 16, so that the axial column 15 is driven to rotate synchronously in the vertical direction through the rotation process of the positioning spline tube 16, so as to simulate the rotation process of the shaft matched with the bearing 2 to be tested when in use.

[0036] Further, the locking assembly includes an inner sealing plate 9 arranged on the level seat 7, an inner cavity groove for sliding connection of the inner sealing plate 9 is opened on the level seat 7, and a locking groove 10 cooperating with the inner sealing plate 9 is opened at a position of the inner threaded tube 6 corresponding to the inner sealing plate 9, and a reset spring 11 is arranged in the inner cavity groove, and both ends of the reset spring 11 are respectively fixedly connected to the inner sealing plate 9 and the level seat 7; The horizontal seat 7 is provided with a groove body for the horizontal sliding of the same-position seat 12, and the inner sealing plate 9 is fixedly connected with a positioning pin 13 on the side facing the same-position seat 12. The same-position seat 12 is provided with a V-shaped adjustment groove 14 for the sliding connection of the positioning pin 13, and the same-position seat 12 is provided with a yield groove for the positioning pin 13 to slide through, and the V-shaped adjustment groove 14 includes an integrally formed inclined groove portion and a horizontal groove portion 141.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, when the threaded rod 5 initially rotates, the inner sealing plate 9 is pushed by the reset spring 11 and is in the locking groove 10. As a result, the internal threaded tube 6 is restricted by the level seat 7 and cannot rotate synchronously with the threaded rod 5. Instead, the rotation of the threaded rod 5 can drive the level seat 7 and the same-position seat 12 arranged thereon to move horizontally.

[0038] At the same time, with the horizontal movement of the parallel seat 7 and the isostatic seat 12, the end ball portion 153 integrally formed at the end of the axial column 15 collides with the baffle 4. At this time, the axial column 15 cannot continue to move with the isostatic seat 12, and then with the movement of the parallel seat 7 and the isostatic seat 12, a relative displacement occurs between the isostatic seat 12 and the axial column 15, so as to drive the distance between the multiple groups of inner arc plates 23 to gradually increase and finally collide with the inner wall of the bearing.

[0039] At the same time, when multiple groups of inner arc plates 23 have all come into contact with the inner wall of the bearing, the axial column 15 is restricted by the bearing and will not move relative to the isotropic seat 12. Moreover, due to the contact between the end ball portion 153 and the baffle plate 4, the isotropic seat 12 cannot continue to move horizontally synchronously with the level seat 7. At this time, the isotropic seat 12 moves relative to the level seat 7, thereby driving the locating pin 13 to slide on the inclined groove portion in the V-shaped adjustment groove 14, thereby changing the horizontal positions of the inner sealing plate 9 and the internal threaded tube 6, so as to prompt the inner sealing plate 9 to disengage from the positioning groove 10.

[0040] Among them, after the inner sealing plate 9 is separated from the internal threaded cylinder 6, the horizontal seat 7 stops moving in the horizontal direction, and after the internal threaded cylinder 6 contacts the restriction of the horizontal seat 7, it can subsequently rotate synchronously with the threaded rod 5, thereby driving the axial column 15 to rotate on the same seat 12 through the driving wheel 19 and the driven wheel 17.

[0041] It should be noted that, in actual use, in the simulated loading test of the bearing 2 to be tested, changing the rotation speed of the shaft matched therewith can change the centrifugal load on the bearing 2 to be tested, and then, by changing the rotation speed of the threaded rod 5, the rotation speed of the driving wheel 19, the driven wheel 17 and the axial column 15 can be changed to apply different degrees of centrifugal load to the bearing 2 to be tested, and in the test of the bearing 2 to be tested, when the rotation speed gradually increases from low speed to high speed, the centrifugal load will gradually increase, and this change can be monitored in real time by the sensor module, for example, by measuring parameters such as the axis displacement and the oil film pressure to indirectly reflect the change of the centrifugal load.

[0042] In addition, the V-shaped adjustment groove 14 also includes an integrally formed horizontal groove portion 141. During the actual test process, different degrees of thrust can be applied to the axial column 15 through the baffle 4 by an external mechanism on the base 1 to simulate the axial load that the bearing 2 to be tested is subjected to during use. Further, when testing the load-bearing capacity of the bearing 2 to be tested, the deformation, temperature change and other parameters of the bearing 2 to be tested under different axial loads can be accurately measured, so as to more accurately evaluate the performance of the bearing 2 to be tested. Among them, by setting the horizontal groove portion 141, it is ensured that the locating pin 13 has space to move again on the V-shaped adjustment groove 14, thereby ensuring that the same-position seat 12 and the level seat 7 have the ability to continue to displace relative to each other, so as to ensure the smooth progress of the axial load application process.

[0043] Based on the embodiment of the cut-off assembly, the variable pitch assembly includes a lateral slide 28 that moves freely in the horizontal direction, and the same position seat 12 includes an integrally formed extension portion 121, and the extension portion 121 is provided with a second groove body for the lateral slide 28 to be slidably connected; The sliding sleeve on the rear spline part 152 is provided with a shift spline cylinder 30, and the counterweight block 32 is fixedly connected to the outer peripheral surface of the shift spline cylinder 30. The shift spline cylinder 30 is fixedly provided with two groups of retaining rings 31, and the sliding sleeve on the shift spline cylinder 30 is provided with a retaining ring 29. The retaining ring 29 is located between the two groups of retaining rings 31 and is in sliding contact with the opposite surfaces of the two groups of retaining rings 31. The retaining ring 29 is fixedly connected to the transverse slide seat 28.

[0044] The extension portion 121 is fixedly connected with two groups of baffles 25, and the two groups of baffles 25 are sleeved on the rearward spline portion 152, and the rearward spline portion 152 is also slidably sleeved with a worm 24, and the worm 24 is in sliding contact with the two groups of baffles 25, and the worm 24 is meshedly connected with a worm wheel 26, and the worm wheel 26 rotates on the extension portion 121 with a fixed axis; A connecting rod 27 is fixedly rotatable on the worm wheel 26 , and one end of the connecting rod 27 away from the worm wheel 26 is fixedly rotatable on a transverse slide 28 .

[0045] like Figure 1 , Figure 2 , Figure 4 and Fig.10 As shown, when the axial column 15 rotates in the vertical direction, the rearward spline portion 152 can drive the worm 24 and the shift spline cylinder 30 mounted thereon to rotate synchronously, and a counterweight block 32 is fixedly provided on the shift spline cylinder 30, so that the radial load on the bearing 2 to be tested can be simulated by the rotation of the counterweight block 32.

[0046] At the same time, a worm wheel 26 is meshedly connected to the worm 24 , and a freely deflectable connecting rod 27 is provided between the worm wheel 26 and the transverse slide 28 , so that when the worm wheel 26 rotates under the drive of the worm 24 , it can drive the connecting rod 27 to deflect and drive the transverse slide 28 to reciprocate on the extension portion 121 .

[0047] Among them, a retaining ring 29 is fixedly provided on the transverse slide 28, and the retaining ring 29 is sleeved on the displacement spline cylinder 30. When the retaining ring 29 moves horizontally with the transverse slide 28, it can push the retaining ring 31 on the corresponding side to drive the displacement spline cylinder 30 to move synchronously with the transverse slide 28 on the rearward spline portion 152, thereby changing the relative position of the counterweight block 32 on the forward spline portion 151 to change the horizontal spacing between the counterweight block 32 and the bearing 2 to be tested. Therefore, by dynamically adjusting the spacing between the counterweight block 32 and the bearing 2 to be tested, the radial load change of the bearing 2 to be tested at different axial positions can be simulated, and by changing the initial position of the counterweight block 32 on the displacement spline cylinder 30, the size and distribution of the radial load can be adjusted, thereby testing the performance of the bearing 2 to be tested under different load conditions, such as load-bearing capacity, lubrication effect and stability, and thus being able to more comprehensively and accurately evaluate the performance of the bearing 2 to be tested.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sliding bearing simulation loading device, comprising a base (1) for supporting a bearing to be tested (2), characterized in that: The base (1) is provided with a simulated load structure for simulating the dynamic load to which the bearing (2) to be tested is subjected when in use; The simulated load structure comprises two groups of positioning seats (3) fixedly connected to the base (1), a horizontal seat (7) freely moving in the horizontal direction is provided between the two groups of positioning seats (3), and a corresponding seat (12) moving synchronously therewith is provided on the horizontal seat (7), an axial column (15) freely rotating in the vertical direction is provided on the corresponding seat (12), and a shaft matching component driving the axial column (15) to be assembled with the bearing (2) to be tested is also provided on the corresponding seat (12); The horizontal seat (7) is provided with a cut-off assembly for limiting the horizontal position of the equiposition seat (12) and driving the axial column (15) to rotate after the axial column (15) and the bearing to be tested (2) are assembled. The axial column (15) comprises an integrally formed forward spline portion (151) and a rearward spline portion (152). The rearward spline portion (152) is provided with a counterweight block (32) that rotates synchronously therewith. The equiposition seat (12) is provided with a variable pitch assembly for adjusting the horizontal spacing between the counterweight block (32) and the bearing to be tested (2).

2. A sliding bearing simulation loading device according to claim 1, characterized in that: The shaft matching component comprises a positioning spline cylinder (16) sleeved on the outer ring of the forward spline portion (151), the positioning spline cylinder (16) is fixedly axially rotated on the same position seat (12), and the same position seat (12) is provided with a circular groove for the axial column (15) to slide through, and the positioning spline cylinder (16) is fixedly connected to a plurality of guide rods (18), and the guide rods (18) are provided with a plurality of inner arc plates (23) that synchronously approach or move away from the axial column (15) on the side facing the bearing (2) to be tested; The axial column (15) is coaxially arranged with a bearing bush integrally formed on the bearing to be tested (2), and the plurality of sets of inner arc plates (23) are in abutting connection with the inner wall of the bearing bush.

3. A sliding bearing simulation loading device according to claim 2, characterized in that: A plurality of groups of the inner arc plates (23) are fixedly connected to a keeper (20) on one side facing the axial column (15); the keeper (20) is provided with a directional swing rod (21) and a dynamic swing rod (22) which are horizontally symmetrically distributed; two ends of the directional swing rod (21) are respectively axially rotated on the guide extension rod (18) and the keeper (20); and two ends of the dynamic swing rod (22) are respectively axially rotated on the keeper (20) and the axial column (15); One end of the axial column (15) facing the bearing to be tested (2) comprises an integrally formed end ball portion (153).

4. A sliding bearing simulation loading device according to claim 1, characterized in that: The interception and opening assembly comprises a threaded rod (5) driven by a motor to rotate freely in a vertical direction, the two ends of the threaded rod (5) are respectively fixedly rotated on a group of positioning seats (3), an internal threaded tube (6) is threadedly connected to the threaded rod (5), and the internal threaded tube (6) is fixedly rotated on a level seat (7); The internal threaded cylinder (6) does not rotate synchronously with the threaded rod (5) in an initial state, and a locking assembly is provided on the leveling seat (7) for driving the internal threaded cylinder (6) and the threaded rod (5) to rotate synchronously, and a guide column (8) is fixedly connected to the positioning seat (3), and the guide column (8) slides through the leveling seat (7); The threaded rod (5) is sleeved with a driving wheel (19), and the driving wheel (19) is coaxially fixed with the internal threaded cylinder (6). The positioning spline cylinder (16) is fixedly sleeved with a driven wheel (17), and the flat seat (7) is provided with a belt for transmitting the driven wheel (17) and the driving wheel (19).

5. A sliding bearing simulation loading device according to claim 4, characterized in that: The locking assembly comprises an inner sealing plate (9) arranged on the level seat (7), the level seat (7) is provided with an inner cavity groove for the inner sealing plate (9) to be slidably connected, the inner threaded tube (6) is provided with a locking groove (10) corresponding to the position of the inner sealing plate (9) and cooperating therewith, a return spring (11) is arranged in the inner cavity groove, and the two ends of the return spring (11) are respectively fixedly connected to the inner sealing plate (9) and the level seat (7); The horizontal seat (7) is provided with a groove body for the horizontal sliding of the same seat (12); a positioning pin (13) is fixedly connected to the inner sealing plate (9) on the side facing the same seat (12); a V-shaped adjustment groove (14) for the sliding connection of the positioning pin (13) is provided on the same seat (12); and a clearance groove for the sliding penetration of the positioning pin (13) is provided on the same seat (12); The V-shaped positioning groove (14) comprises an integrally formed oblique groove portion and a horizontal groove portion (141).

6. A sliding bearing simulation loading device according to claim 3, characterized in that: A baffle (4) is provided on a side of the bearing to be tested (2) away from the level seat (7); the baffle (4) is fixedly connected to the base (1) and corresponds to the end ball portion (153).

7. A sliding bearing simulation loading device according to claim 3, characterized in that: The pitch-changing assembly comprises a lateral slide (28) that freely moves in a horizontal direction, and the co-position seat (12) comprises an integrally formed extension portion (121), and a second groove body for sliding connection of the lateral slide (28) is formed on the extension portion (121); The sliding sleeve on the rearward spline portion (152) is provided with a displacement spline cylinder (30), the counterweight (32) is fixedly connected to the outer peripheral surface of the displacement spline cylinder (30), the fixed sleeve on the displacement spline cylinder (30) is provided with two groups of retaining rings (31), and the sliding sleeve on the displacement spline cylinder (30) is provided with a retaining ring (29), the retaining ring (29) is located between the two groups of retaining rings (31) and is in sliding contact with the opposite surfaces of the two groups of retaining rings (31), and the retaining ring (29) is fixedly connected to the transverse slide seat (28).

8. A sliding bearing simulation loading device according to claim 7, characterized in that: Two groups of baffles (25) are fixedly connected to the extension portion (121), and the two groups of baffles (25) are both sleeved on the rearward spline portion (152). A worm (24) is also slidably sleeved on the rearward spline portion (152). The worm (24) and the two groups of baffles (25) are in sliding contact with each other. The worm (24) is meshingly connected with a worm wheel (26), and the worm wheel (26) rotates on the extension portion (121) with a fixed axis. A connecting rod (27) is provided on the worm wheel (26) for fixed axis rotation, and one end of the connecting rod (27) away from the worm wheel (26) is fixed axis rotation on a transverse slide seat (28).

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