Rail transit gearbox bearing test platform

Abstract

The invention discloses a rail transit gearbox bearing test platform, which comprises a platform, and a driving device, a radial loading device, an axis axial loading device, an eccentric axial loading device, a first test device and a second test device which are arranged on the platform, the radial loading device is slidably mounted on the platform; the first test device and the second test device are both provided with oil ways. Through the arrangement of the first test device, the second test device, the axis axial loading device and the eccentric axial loading device, the overall performance test of a group of output end or input end gearbox bearings is realized. Meanwhile, radial loads can be applied to different bearings during tests through the arranged radial loading device capable of conducting position adjustment, the applicability of the device is greatly improved, it can be guaranteed that various test requirements of two kinds of gear box bearings can be met, and the test platform can be used for testing the two kinds of gear box bearings through simulation of matching of the real state and the installation layout structure. Performance verification of the gearbox bearing under various working conditions can be achieved, it is guaranteed that test conditions are close to real operation working conditions, and reliability of test results is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit gearbox bearing inspection and testing, and in particular to a rail transit gearbox bearing testing platform. Background Art

[0002] The service conditions of rail transit gearbox bearings are relatively complex. While bearings are subjected to radial and axial forces in different directions, they are also subjected to various non-deterministic vibrations and impacts caused by the unevenness of traction motors and track lines, which affects the study of the actual operating conditions of gearbox bearings.

[0003] At present, there are few experimental studies on gearbox bearings at home and abroad. The test items of gearbox bearings are mainly carried out on general bearing test benches or comprehensive test benches. However, general bearing test benches can only test single sets of bearings, and cannot simulate the actual installation structure, cannot simulate the actual working conditions of gearbox bearings, cannot guarantee the reliability of test results, and cannot meet the current technical development and type verification requirements of gearbox bearings. Comprehensive test benches are expensive and are mainly used for performance verification of gearbox bodies, not for durability quality assessment and performance verification of gearbox bearings. Summary of the invention

[0004] The present invention provides a rail transit gearbox bearing test platform to solve the above problems.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A rail transit gearbox bearing test platform, comprising a platform, a driving device arranged on the platform, a radial loading device, a shaft axial loading device, an eccentric axial loading device, a first testing device and a second testing device;

[0007] When testing the output end bearing, the first test device is installed on the first support and the second support provided on the platform, the output end bearing is installed in the first test device, one end of the first test device is connected to the driving device, the other end is connected to the shaft axial loading device or the eccentric axial loading device, and one side of the first test device is connected to the radial loading device;

[0008] When testing the input end bearing, the second test device is installed on the first support, the input end bearing is installed in the second test device, one end of the second test device is connected to the driving device, the other end is connected to the shaft axial loading device, and one side of the second test device is connected to the radial loading device;

[0009] The radial loading device can be slidably mounted on the platform;

[0010] The first test device and the second test device are both provided with oil circuits.

[0011] Further, the first test device comprises a simulated gear housing, a first test shaft, a first bearing seat detachably mounted on the first support, and a second bearing seat detachably mounted on the second support;

[0012] The middle part of the first test shaft is installed in the simulated gear box, and the two ends of the first test shaft are respectively installed in the first bearing seat and the second bearing seat; the output end bearing is installed in the simulated gear box and at the two ends of the outer periphery of the first test shaft, and an inner spacer is provided between the two output end bearings; the first end cover and the second end cover are respectively installed at the two ends of the simulated gear box, and a sealing ring is provided between the first end cover and the first test shaft, and between the second end cover and the first test shaft, and a gasket is provided between the sealing ring close to the first end cover and the output end bearing; a sealing structure is provided between the sealing ring and the first end cover, and between the sealing ring and the second end cover;

[0013] One end of the first test shaft extending out of the first bearing seat is detachably connected to the driving device, and the second end cover is detachably connected to the shaft axial loading device; the simulated gear box is detachably connected to the radial loading device.

[0014] Further, the second test device comprises a second test shaft, a third bearing seat, and a radial load-bearing bearing and an axial load-bearing bearing sleeved on the outer periphery of the second test shaft installed in the third bearing seat;

[0015] The third bearing seat is detachably mounted on the first support, and a plurality of input end bearings are arranged in the third bearing seat and sleeved on both ends of the second test shaft;

[0016] The third end cover and the fourth end cover are respectively installed at both ends of the third bearing seat, and the end of the second test shaft extending out of the third end cover is connected to the driving device through a coupling, and the fourth end cover is detachably connected to the shaft axial loading device.

[0017] Furthermore, the shaft axial loading device comprises a loading cylinder, a transition rod, a first joint bearing, an axial pull plate and a first pull rod which are arranged along the axial direction of the first test shaft and are detachably connected in sequence from away from the driving device to close to the driving device;

[0018] When the output end bearing test is performed, the end of the first pull rod away from the axial pull plate passes through the second bearing seat and is connected to the second end cover through the second spherical bearing;

[0019] When the input end bearing test is performed, the end of the transition rod away from the loading cylinder is connected to the fourth end cover through the first spherical bearing.

[0020] Furthermore, the eccentric axial loading device includes a second pull rod and a third spherical bearing arranged along the axial direction of the first test axis, and one end of the second pull rod away from the loading cylinder can pass through the second support and be connected to the simulated gear box through the third spherical bearing.

[0021] Furthermore, the radial loading device comprises a radial driving oil cylinder, a radial loading spherical bearing connected to the piston end of the radial driving oil cylinder, and a sliding device;

[0022] The radial drive cylinder is mounted on the platform via a first sliding device;

[0023] One end of the radially loaded spherical bearing away from the radial driving oil cylinder can be detachably connected to the simulated gear box body or the third bearing seat.

[0024] Furthermore, an oil inlet hole is provided on the simulated gear housing at a position corresponding to the position where the output end bearing is installed;

[0025] An oil filling hole is provided on the third bearing seat at a position corresponding to the position where the input end bearing is installed.

[0026] Furthermore, a main box is provided on the platform, and the first support, the second support and the third support are all provided on the main box;

[0027] The shaft axial loading device is installed on the third support, and the third support can move along the axial direction on the main box body.

[0028] Furthermore, the sealing structure includes a labyrinth seal, a serrated oil retaining groove and an oil return slope. A labyrinth seal is formed between the first end cover and the sealing ring and between the second end cover and the sealing ring. The serrated oil retaining groove is arranged on the sealing ring and is connected to the labyrinth seal. The oil return slope is provided on both the first end cover and the second end cover, and the oil return slope is arranged opposite to the serrated oil retaining groove.

[0029] Furthermore, it also includes a speed change device arranged between the driving device and the first support.

[0030] The beneficial effects of the present invention are:

[0031] A rail transit gearbox bearing test platform disclosed in the present invention realizes the overall performance test of a group of output-end or input-end gearbox bearings by means of a first test device, a second test device, an axial loading device, an eccentric axial loading device and a radial loading device, and enables the axial load of the gearbox bearing test to be loaded in two ways, eccentrically and along the center of the shaft, to meet various performance test requirements of the output-end and input-end gearbox bearings; at the same time, by means of a radial loading device capable of position adjustment, radial loads can be applied to different bearings during the test, thereby greatly improving the applicability of the device and ensuring that multiple tests can be carried out. A load application method is used to truly simulate the working conditions of the gearbox bearings in actual applications, meet various test requirements of multiple groups of gearbox bearings, and thus ensure that the test results are more accurate and reliable. In addition, there are oil circuits on the first test device and the second test device, which is convenient for accurately controlling the lubrication flow of the gearbox bearings, and further improving the degree of proximity between the test conditions and the actual operating conditions, thereby further ensuring the accuracy of the test results; this test platform can achieve performance verification of the gearbox bearings under various working conditions by simulating the coordination and installation layout structure of the actual state, and ensure that the test conditions are as close to the actual operating conditions as possible, thereby ensuring the accuracy and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention Figure 1 (First test device and eccentric axial loading device);

[0034] Figure 2 A schematic diagram of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention Figure 2 (First test device and shaft axial loading device);

[0035] Figure 3 A schematic diagram of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention Figure 3 (Second test device and shaft axial loading device);

[0036] Figure 4 This is a front view of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention (a second test device and an axle axial loading device);

[0037] Figure 5 It is a schematic diagram of the connection structure between a first test device and an axle axial loading device of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention;

[0038] Figure 6 It is a schematic structural diagram of a first test device of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention;

[0039] Figure 7 It is a schematic diagram of the sealing structure of the first test device of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention;

[0040] Figure 8 It is a schematic structural diagram of a second test device of a rail transit gearbox bearing test platform disclosed in an embodiment of the present invention.

[0041] In the figure:

[0042] 1. Platform;

[0043] 2. Main box;

[0044] 3. The first support;

[0045] 4. Second support; 401. Linear bearing;

[0046] 5. The third support;

[0047] 6. First test device; 601. output end bearing; 602. first bearing seat; 603. second bearing seat; 604. simulated gear box; 605. first oil inlet hole; 606. second oil inlet hole; 607. sealing ring; 608. first end cover; 609. labyrinth seal; 610. serrated oil retaining groove; 611. oil return slope; 612. gasket; 613. second end cover; 614. inner spacer; 615. first test shaft; 616. support bearing; 617. loading block;

[0048] 7. Axial loading device of the shaft; 701. Loading cylinder; 702. Cylinder piston rod; 703. First axial force sensor; 704. Transition rod; 705. First joint bearing; 706. Axial pull plate; 707. First rod; 709. Second joint bearing; 710. Gland;

[0049] 8. Coupling;

[0050] 9. Radial loading device; 901. Radial driving cylinder; 902. Radial loading spherical bearing; 903. Sliding device; 904. T-type slideway; 905. T-type slide block;

[0051] 10. Driving device;

[0052] 11. Speed ​​change device;

[0053] 12. Eccentric axial loading device; 1201. Second pull rod; 1202. Third joint bearing; 1203. Loading device base; 1204. Second axial force sensor;

[0054] 13. Second test device; 1301. Input end bearing; 1302. First oil filling hole; 1303. Second oil filling hole; 1304. Radial load-bearing bearing; 1305. Second test shaft; 1306. Axial load-bearing bearing; 1307. Third bearing seat; 1308. Third end cover; 1309. Fourth end cover; 1310. Left bearing seat; 1311. Right bearing seat. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0056] like Figure 1-4 The present embodiment shows a rail transit gearbox bearing test platform, which includes a platform 1, a driving device 10 arranged on the platform, a radial loading device 9, a shaft axial loading device 7, an eccentric axial loading device 12, a first test device 6 and a second test device 13;

[0057] When testing the output end bearing 601, the first test device is installed on the first support 3 and the second support 4 provided on the platform, the output end bearing is installed in the first test device 6, one end of the first test device is connected to the driving device, and the other end is connected to the shaft axial loading device 7 or the eccentric axial loading device 12, and one side of the first test device 6 is connected to the radial loading device 9;

[0058] When testing the input end bearing 1301, the second test device is installed on the first support, the input end bearing 1301 is installed in the second test device 13, one end of the second test device is connected to the driving device 10, and the other end is connected to the shaft axial loading device 7, and one side of the second test device 13 is connected to the radial loading device 9;

[0059] The radial loading device 9 can be slidably mounted on the platform 1;

[0060] The first test device 6 and the second test device 13 are both provided with oil circuits.

[0061] When the output end bearing is tested by the axial axial loading device 7, the applied radial load Fr is equal to the sum of the radial loads borne by the two output end gearbox bearings; when the output end bearing is eccentrically loaded by the eccentric axial loading device 12, the applied radial load Fr is equal to the radial load borne by the two output end gearbox bearings minus the eccentric bending moment load, that is, Fr=2*F-Fa*X / L, wherein Fa is the applied axial load, F is the radial load borne by a single output end gearbox bearing, X is the eccentricity of the axial load, and L is the distance between the force application points of the two output end bearings.

[0062] By setting up the first test device 6 and the second test device 13, the shaft axial loading device 7, and the eccentric axial loading device 12, the axial load can be loaded in two ways: eccentric and along the shaft center, meeting the test requirements for the output and input gearbox bearings, and realizing the performance test of a group of output or input gearbox bearings as a whole. At the same time, by setting up a radial loading device that can be adjusted in position, radial loads can be applied to them during different bearing tests, which greatly improves the applicability of the device, can ensure that various test requirements of the two gearbox bearings are met, and the working conditions of the gearbox bearings in actual applications are truly simulated, thereby ensuring that the test results are more accurate and reliable. In addition, there are oil circuits on the first test device 6 and the second test device 13, which can accurately control the lubrication flow of the gearbox bearings, further ensuring that the test conditions are close to the actual operating conditions, thereby further ensuring the accuracy of the test results; this test platform can realize the performance verification of the gearbox bearings under various working conditions by simulating the coordination and installation layout structure of the actual state, ensuring that the test conditions are close to the actual operating conditions, and improving the reliability of the test results.

[0063] In a specific embodiment, Figure 1 , Figure 5-6 As shown, the first test device 6 includes a simulated gear box 604, a first test shaft 615, a first bearing seat 602 detachably mounted on the first support 3, and a second bearing seat 603 detachably mounted on the second support 4;

[0064] The middle part of the first test shaft 615 is installed in the simulated gear box 604, and the two ends of the first test shaft 615 are respectively installed in the first bearing seat 602 and the second bearing seat 603; the output end bearing 601 is installed in the simulated gear box 604 and at the two ends of the outer periphery of the first test shaft, and an inner spacer 614 is provided between the two output end bearings 601; the first end cover 608 and the second end cover 613 are respectively installed at the two ends of the simulated gear box 604, and a sealing ring 607 is provided between the first end cover and the first test shaft, and between the second end cover and the first test shaft, and a gasket 612 is provided between the sealing ring on the side close to the first end cover and the output end bearing 601; a sealing structure is provided between the sealing ring and the first end cover, and between the sealing ring and the second end cover;

[0065] One end of the first test shaft 615 extending out of the first bearing seat 602 is detachably connected to the driving device 10 , and the second end cover 613 is detachably connected to the shaft axial loading device 7 ; the simulated gear box 604 is detachably connected to the radial loading device 9 .

[0066] The first bearing seat 602 and the second bearing seat 603 are both provided with support bearings 616 for supporting both ends of the first test shaft 615. The first test shaft is connected to a speed change device 11 provided between the drive device 10 and the main housing 2 through a coupling 8. The speed change device 11 is connected to the drive device 10, and the drive device 10 is a motor.

[0067] The simulated gear box 604 is an integral structure, and the matching and installation structure layout of the output end bearing in the simulated gear box 604 is the same as that used in the rail transit gear box; when testing the output end bearing 601, the drive device 10 drives the first test shaft 615 to rotate, and at the same time, the loading cylinder 701 of the axial loading device 7 applies an axial load to the output end bearing 601 therein through the simulated gear box 604 (second end cover), and at the same time, the radial loading device 9 transfers the radial load to the output end bearing 601 therein through the simulated gear box 604, truly simulating the actual operating conditions of the output end bearing 601, and at the same time, combined with the adjustment of the amount and temperature of the lubricating oil introduced, it is further ensured that the test is as close to the actual working conditions as possible, meets the test requirements for the output end bearing 601, and ensures the accuracy and reliability of the test results.

[0068] In this embodiment, the washer 612 is connected to the first end cover 608 by screws, and the axial clearance of the output end bearing is adjusted by setting washers of different widths to adjust the axial clearance to a range that meets the test requirements.

[0069] When testing the output end bearing 601, the steps of assembling the first test device 6 are as follows:

[0070] Place the first test shaft 615 vertically with the coupling 8 end facing upwards, install the sealing ring 607 by heating or cold pressing, and make contact with the shoulder of the first test shaft 615, and keep the pressure for 10 to 15 seconds, then put the second end cover 613 and the output end bearing outer ring into the upper end of the first test shaft 615 until it can no longer move downward, then install the output end bearing inner ring assembly on the first test shaft 615 by heating or cold pressing, and make contact with the sealing ring, and keep the pressure for 10 to 15 seconds, then install the inner spacer, another output end bearing inner ring assembly, and the simulated gear box with the output end bearing outer ring installed in sequence; connect the gasket to the first end cover with screws, then put the first end cover and the second end cover into the test shaft, and ensure that the end face of the gasket is in contact with the end face of the output end bearing outer ring, fix each component with bolts and screws, and measure the installation clearance. After the installation clearance meets the requirements, install the various components of the first bearing seat on the first test shaft, turn the first test shaft 180°, install the various components of the second bearing seat, install the first bearing seat and the second bearing seat on the first support and the second support respectively, connect the radial loading device to the simulated gear box, connect the drive device and the speed change device to the first test shaft, and finally, according to the required axial load or eccentric axial load applied to the output end bearing, select the axial loading device to connect the second end cover or the eccentric axial loading device to the loading block on the simulated gear box, and test the output end bearing under different working conditions.

[0071] In a specific embodiment, the second test device 13 includes a second test shaft 1305, a third bearing seat 1307, and a radial load-bearing bearing 1304 and an axial load-bearing bearing 1306 sleeved on the outer periphery of the second test shaft 1305 installed in the third bearing seat;

[0072] The third bearing seat 1307 is detachably mounted on the first support 3, and the plurality of input end bearings 1301 are arranged in the third bearing seat 1307 and sleeved on both ends of the second test shaft 1305;

[0073] The third end cover 1308 and the fourth end cover 1309 are respectively installed at both ends of the third bearing seat 1307, and the end of the second test shaft 1305 extending out of the third end cover 1308 is connected to the driving device 10 through the coupling 8, and the fourth end cover is detachably connected to the shaft axial loading device 7.

[0074] The first support 3 includes a left support 301 and a right support 302 which are arranged at intervals, so as to ensure that the axial width of the first support 3 is greater than that of the second support 4 and the third support 5, so as to match the width of the third bearing seat (input end gearbox bearing seat) and meet the support requirements of the third bearing seat 1307;

[0075] When testing the input end bearing 1301, the first test device 6 is separated from the drive device 10, the radial loading device and the shaft axial loading device 7 (or the eccentric axial loading device 12), and the first bearing seat 602 and the second bearing seat 603 are removed from the first support 3 and the second support 4, and then the assembled second test device 13 is installed on the spindle box 2, specifically, the third bearing seat 1307 is installed on the first support 3, and then the end of the second test shaft 1305 extending out of the third end cover 1308 is connected to the speed change device 11 through the coupling 8, the shaft axial loading device 7 is adjusted to a suitable position, the fourth end cover on the third bearing seat is connected to the shaft axial loading device 7, the radial loading device is adjusted along the sliding device to the position corresponding to the first support, and finally the radial loading spherical bearing 902 of the radial loading device 9 is connected to the third bearing seat to complete the installation of the second test device 13, and then the output end bearing is lubricated through the simulated gear box 604 and the oil filling hole on the third bearing seat, and the test can be started by starting each drive device and cylinder.

[0076] The test platform conducts tests on the input-end bearing and the output-end bearing through a set of driving devices, an axial loading device 7 and a radial loading device 9, which can also greatly save the number of device settings, further save the layout area of ​​the test platform, and further save the cost of the test platform.

[0077] In a specific embodiment, the shaft axial loading device 7 includes a loading cylinder 701, a transition rod 704, a first joint bearing 705, an axial pull plate 706 and a first pull rod 707 which are arranged along the axial direction of the first test shaft 615 and are detachably connected in sequence from away from the driving device to close to the driving device;

[0078] When the output end bearing test is performed, the end of the first tie rod 707 away from the axial pull plate 706 passes through the second bearing seat 603 and is connected to the second end cover through the second spherical bearing 709; a pressure cover 710 is provided on one side of the second end cover to position the second spherical bearing 709, and a linear bearing 401 is provided in the second bearing seat 603 to support and position the first tie rod 707, and the cylinder piston rod 702 of the loading cylinder 701 is connected to the transition tie rod 704 through the first axial force sensor 703;

[0079] When conducting an input end bearing test, the end of the transition rod 704 away from the loading cylinder 701 is connected to the fourth end cover 1309 via the first spherical bearing 705, that is, the cylinder piston rod 702 of the loading cylinder 701 is connected to the fourth end cover via the first axial force sensor 703, the transition rod 704, and the first spherical bearing 705 in sequence, and the cylinder piston rod 702 of the loading cylinder 701 and the transition rod 704 are coaxially arranged with the first test axis, so that the first loading cylinder 701 can apply an axial load to 1301 in the third bearing seat 1307.

[0080] In a specific embodiment, the eccentric axial loading device 12 includes a second tie rod 1201 and a third joint bearing 1202 arranged along the axial direction of the first test axis. The end of the second tie rod away from the loading cylinder 701 can pass through the second support 4 and be connected to the simulated gear box 604 through the third joint bearing 1202; specifically, the second tie rod 1201 is positioned by a linear bearing 401 provided on the second support, and the loading cylinder 701 is installed on the eccentric loading device base 1203 provided on the spindle box 2 ( When applying the eccentric load test and the axial load test are performed separately), the piston rod 702 of the loading cylinder 701 is connected to the second pull rod 1201 through the second axial force sensor 1204, and the loading block 617 is detachably installed on the simulated gear box 604. The second pull rod is connected to the loading block through the third spherical bearing. The second pull rod is arranged parallel to the first test axis, that is, the different axis arrangement (eccentric arrangement), so that the loading cylinder can achieve the effect of applying an axial eccentric load to the output end bearing through the second pull rod and the third spherical bearing.

[0081] In a specific embodiment, the radial loading device 9 includes a radial driving cylinder 901, a radial loading spherical bearing 902 connected to the piston end of the radial driving cylinder, and a sliding device 903;

[0082] The radial drive cylinder 901 is installed on the platform 1 through a first sliding device 903;

[0083] One end of the radial loading spherical bearing 902 away from the radial driving cylinder 901 can be detachably connected to the simulated gear box 604 or the third bearing seat 1307 .

[0084] The first sliding device 903 includes a T-shaped groove 904 arranged along the first test axis and a T-shaped slider 905 arranged at the bottom of the radial driving cylinder base carrying the radial driving cylinder. The T-shaped slider is arranged in the T-shaped groove, and a locking bolt is provided on the T-shaped slider. The radial driving cylinder base is driven to slide along the T-shaped groove by external force, and the locking bolt fixes the radial driving cylinder base at a specific position. The T-shaped groove and the T-shaped slider can realize the adjustment of the position of the radial loading device on the platform (main box) to adapt to the position requirements of the radial loading under different test requirements. The position adjustment of the radial loading device is also more convenient by setting the T-shaped groove and the T-shaped slider.

[0085] In a specific embodiment, an oil inlet hole is provided on the simulated gear housing 604 at a position corresponding to the position where the output end bearing 601 is installed;

[0086] An oil filling hole is provided on the third bearing seat 1307 at a position corresponding to the installation position of the input end bearing 1301 .

[0087] Specifically, the third bearing seat 1307 includes a left bearing seat 1310 and a right bearing seat 1311 connected to each other, and the radial load-bearing bearing 1304, the axial load-bearing bearing 1306 and the input end bearing 1301 are respectively arranged in the left bearing seat and the right bearing seat. Figure 8 As shown, a radial load-bearing bearing 1304 and two input-end bearings 1301 are provided in the left bearing seat 1310, an axial load-bearing bearing and an input-end bearing are provided in the right bearing seat 1311, a first oil filling hole 1302 connected to the oil circuit inside the left bearing seat is provided on the left bearing seat, and a second oil filling hole 1303 connected to the oil circuit inside the right bearing seat is provided on the right bearing seat, the first oil filling hole and the second oil filling hole are respectively used to lubricate the input-end bearings installed in the left bearing seat and the right bearing seat, a first oil inlet hole 605 and a second oil inlet hole 606 provided on the simulated gear box body 604 are connected to the oil circuit in the simulated gear box body 604, and are used to lubricate the output-end bearing 601, and the lubrication effect on the bearing is controlled by controlling the lubricating oil flow rate and oil temperature of each oil circuit, thereby ensuring that when the gear box bearing is tested, the real working environment of the gear box bearing can be simulated, thereby improving the accuracy of the test results.

[0088] In a specific embodiment, Figure 1 As shown, a main box body 2 is provided on the platform 1, and the first support 3, the second support 4 and the third support 5 are all provided on the main box body 2;

[0089] The shaft axial loading device 7 is installed on the third support 5, and the third support can move in the axial direction on the main housing 2; when the output end bearing 601 or the input end bearing 1301 is tested, the third support 5 can adjust its position on the main housing 2 as needed, so as to support the shaft axial loading device 7 and apply the shaft axial load to the output end bearing (simulating the gear housing 604) or the input end bearing (third bearing seat), thereby facilitating the performance test of the gear box bearing.

[0090] In a specific embodiment, Figure 7 As shown, the sealing structure includes a labyrinth seal 609, a serrated oil retaining groove 610 and an oil return slope 611. A labyrinth seal 609 is formed between the first end cover 608 and the sealing ring 607 and between the second end cover 613 and the sealing ring 607. The serrated oil retaining groove is arranged on the sealing ring 607 and is connected to the labyrinth seal 609. The first end cover 608 and the second end cover 613 are both provided with the oil return slope, and the oil return slope is arranged opposite to the serrated oil retaining groove. The labyrinth seal, the serrated oil retaining groove and the oil return slope cooperate to improve the sealing performance of the simulated gear box 604, thereby preventing lubricating oil from overflowing.

[0091] In a specific embodiment, Figure 1 As shown, it also includes a speed change device 11 arranged between the driving device 10 and the first support 3; the speed change device 11 is used to adjust the rotation speed applied to the test shaft to adapt to different test rotation speed requirements of the input end bearing and the output end bearing, so as to facilitate corresponding tests.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rail transit gearbox bearing test platform, characterized in that: It comprises a platform (1), a driving device (10) arranged on the platform, a radial loading device (9), a shaft axial loading device (7), an eccentric axial loading device (12), a first testing device (6) and a second testing device (13); When testing the output end bearing (601), the first test device is installed on a first support (3) and a second support (4) provided on the platform, the output end bearing is installed in the first test device (6), one end of the first test device is connected to the driving device, and the other end is connected to the shaft axial loading device (7) or the eccentric axial loading device (12), and one side of the first test device (6) is connected to the radial loading device (9); When testing the input end bearing (1301), the second test device is installed on the first support, the input end bearing (1301) is installed in the second test device (13), one end of the second test device is connected to the driving device (10), and the other end is connected to the shaft axial loading device (7), and one side of the second test device (13) is connected to the radial loading device (9); The radial loading device (9) can be slidably mounted on the platform (1); The first test device (6) and the second test device (13) are both provided with oil circuits.

2. A rail transit gearbox bearing test platform according to claim 1, characterized in that: The first test device (6) comprises a simulated gear housing (604), a first test shaft (615), a first bearing seat (602) detachably mounted on the first support (3), and a second bearing seat (603) detachably mounted on the second support (4); The middle part of the first test shaft (615) is installed in the simulated gear housing (604), and the two ends of the first test shaft (615) are respectively installed in the first bearing seat (602) and the second bearing seat (603); the output end bearing (601) is installed in the simulated gear housing (604) and at the two ends of the outer periphery of the first test shaft, and an inner spacer (614) is provided between the two output end bearings (601); the first end cover (608) is respectively installed at the two ends of the simulated gear housing (604). ) and a second end cover (613), a sealing ring (607) is provided between the first end cover (608) and the first test shaft, and between the second end cover (613) and the first test shaft, a gasket (612) is provided between the sealing ring (607) on the side close to the first end cover (608) and the output end bearing (601); a sealing structure is provided between the sealing ring (607) and the first end cover (608), and between the sealing ring (607) and the second end cover (613); One end of the first test shaft (615) extending out of the first bearing seat (602) is detachably connected to the driving device (10), and the second end cover (613) is detachably connected to the shaft axial loading device (7); and the simulated gear housing (604) is detachably connected to the radial loading device (9).

3. A rail transit gearbox bearing test platform according to claim 2, characterized in that: The second test device (13) comprises a second test shaft (1305), a third bearing seat (1307), and a radial load-bearing bearing (1304) and an axial load-bearing bearing (1306) sleeved on the outer periphery of the second test shaft (1305) installed in the third bearing seat; The third bearing seat (1307) is detachably mounted on the first support seat (3), and the plurality of input end bearings (1301) are arranged in the third bearing seat (1307) and sleeved on both ends of the second test shaft (1305); A third end cover (1308) and a fourth end cover (1309) are respectively installed at both ends of the third bearing seat (1307); one end of the second test shaft (1305) extending out of the third end cover (1308) is connected to the driving device (10) via a coupling (8); and the fourth end cover (1309) is detachably connected to the shaft axial loading device (7).

4. A rail transit gearbox bearing test platform according to claim 3, characterized in that: The shaft axial loading device (7) comprises a loading cylinder (701), a transition rod (704), a first joint bearing (705), an axial pull plate (706) and a first pull rod (707) which are arranged along the axial direction of the first test shaft (615) and are detachably connected in sequence from a direction away from the driving device to a direction close to the driving device; When the output end bearing (601) is tested, the end of the first pull rod away from the axial pull plate (706) passes through the second bearing seat (603) and is connected to the second end cover (613) through the second spherical bearing (709); When the input end bearing (1301) is tested, the end of the transition rod (704) away from the loading cylinder (701) is connected to the fourth end cover (1309) through the first joint bearing (705).

5. A rail transit gearbox bearing test platform according to claim 4, characterized in that: The eccentric axial loading device (12) includes a second pull rod (1201) and a third joint bearing (1202) arranged along the axial direction of the first test axis, and the end of the second pull rod away from the loading cylinder (701) can pass through the second support (4) and be connected to the simulated gear box (604) through the third joint bearing (1202).

6. The rail transit gearbox bearing test platform according to claim 3, characterized in that: The radial loading device (9) comprises a radial driving oil cylinder (901), a radial loading joint bearing (902) connected to the piston end of the radial driving oil cylinder, and a sliding device (903); The radial drive cylinder (901) is mounted on the platform (1) via a first sliding device (903); One end of the radial loading spherical bearing (902) away from the radial driving oil cylinder (901) can be detachably connected to the simulated gear box (604) or the third bearing seat.

7. The rail transit gearbox bearing test platform according to claim 3, characterized in that: An oil inlet hole is provided on the simulated gear housing (604) at a position corresponding to the position where the output end bearing (601) is installed; An oil injection hole is provided on the third bearing seat (1307) at a position corresponding to the position where the input end bearing (1301) is installed.

8. The rail transit gearbox bearing test platform according to claim 1, characterized in that: A main box (2) is provided on the platform (1), and the first support (3), the second support (4) and the third support (5) are all arranged on the main box (2); The shaft center axial loading device (7) is installed on the third support (5), and the third support can move along the axial direction on the main box body (2).

9. The rail transit gearbox bearing test platform according to claim 2, characterized in that: The sealing structure comprises a labyrinth seal (609), a serrated oil retaining groove (610) and an oil return slope (611); a labyrinth seal (609) is formed between the first end cover (608) and the sealing ring (607) and between the second end cover (613) and the sealing ring (607); the serrated oil retaining groove is arranged on the sealing ring (607) and connected to the labyrinth seal (609); the first end cover (608) and the second end cover (613) are both provided with the oil return slope, and the oil return slope is arranged opposite to the serrated oil retaining groove.

10. The rail transit gearbox bearing test platform according to claim 1, characterized in that: It also includes a speed change device (11) arranged between the driving device (10) and the first support (3).

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