Horizontal sliding bearing test bed

Abstract

The invention provides a horizontal sliding bearing test bed, which belongs to the field of sliding bearing safety operation and detection and comprises a main transmission system, a driving system, a radial loading system, a heating system and a hydraulic system. A sliding bearing seat in the radial loading system is inversely fixed on a lower loading plate and is detachably sleeved and fixed on a test bearing, and a test bed applies pressure to the lower loading plate through a hydraulic cylinder to apply radial load to a test sliding bearing. A rotary swing hydraulic oil cylinder in the main transmission system provides power to test the horizontal sliding bearing. The hydraulic system is connected with the rotary swing hydraulic oil cylinder and the radial loading oil cylinder and can achieve closed-loop control over torque and radial loading force. The heating system simulates a high-temperature working condition through a heating box, and a test bearing can be set to be tested at a specific high temperature. According to the invention, large load detection can be realized, working condition simulation is accurate, data such as bearing working torque and service life can be detected, and comprehensive and multi-size adaptability is realized.

Description

Technical Field

[0001] The invention belongs to the field of safe operation and detection of sliding bearings and relates to a horizontal sliding bearing test bench. Background Art

[0002] The bearing test bench is an important test device for testing whether the bearing product meets the working condition requirements during the development stage of the bearing product. After the corresponding bearing product is finalized, the bearing test can achieve the purpose of assessing the bearing quality, identifying the quality grade of the bearing product, and promoting the improvement of product quality, thereby verifying whether there are problems in the bearing structure, material, manufacturing process and other links, and then improving and controlling them.

[0003] However, the existing bearing test bench is difficult to achieve multi-size adaptation, that is, it can only test bearings of specific sizes or materials, and it is impossible to test bearings of multiple sizes on the same bearing test bench; at the same time, the existing bearing test bench cannot meet the testing requirements under special working conditions of high temperature and heavy load. Therefore, a practical and comprehensive horizontal sliding bearing test bench with multi-size adaptation and high temperature working condition simulation is designed to realize the testing of metal sliding bearings under high temperature working conditions. Summary of the invention

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a horizontal sliding bearing test bench, which can simulate high temperature and heavy load conditions to test metal sliding bearings of multiple sizes to obtain parameters such as anti-friction performance and life.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] A horizontal sliding bearing test bench, the horizontal sliding bearing test bench comprises a main transmission system, a drive system, a heating system, a radial loading system 6, a hydraulic system and a test bench bearing structure. The test bearing 66 is installed on the main transmission system, the radial loading system 6 is installed on the main transmission system along the radial direction of the test bearing 66 and provides a radial load to the test bearing 66, the drive system provides power to realize the rotation of the main transmission system, the heating system heats and controls the temperature of the test bearing 66, and realizes the test of the test bearing 66, and the test bearing 66 is a metal sliding bearing. Specifically:

[0007] The main transmission system includes a main shaft 11, upper and lower split support bearings, a sleeve 12, and a cushion block 8, wherein the upper and lower split support bearings include a first support bearing 5 and a second support bearing 7. The main transmission system adopts an inverted structure, that is, the main shaft 11 is supported by the first support bearing 5 and the second support bearing 7 arranged on both sides, and is fixed on the bottom plate 10 through the cushion block 8, the test bearing 66 is arranged in the middle section of the main shaft 11, and the radial loading system 6 directly applies a radial load to the test bearing 66. The sleeve 12 is fixedly connected to the middle shaft section of the main shaft 11, and rubs against the inner side of the test bearing 66 during the test process, simulating the friction of the test bearing 66 in actual working conditions, and can test sliding bearings of different sizes by replacing the main shaft and replacing sleeves of different sizes to install sliding bearings of different sizes.

[0008] The hydraulic system provides power for the rotary swing hydraulic cylinder 1 and the radial loading cylinder 61 at the same time. The hydraulic system is integrated into a hydraulic station, including an oil tank 13, a liquid level and temperature gauge 14, an air filter 15, a liquid level gauge 16, a thermometer 17, a drive motor 18, a first gear pump 19.1, a second gear pump 19.2, a first non-return valve 20.1, a second non-return valve 20.2, a first pressure measuring contact 21.1, a second pressure measuring contact 21.2, a first pressure measuring hose 22.1, a second pressure measuring hose 22.2, The first pressure gauge 23.1, the second pressure gauge 23.2, the first electromagnetic overflow valve 24.1, the second electromagnetic overflow valve 24.2, the first cooler 25.1, the second cooler 25.2, the first return oil filter 26.1, the second return oil filter 26.2, the accumulator 27, the first pressure line filter 28.1, the second pressure line filter 28.2, the first proportional reversing valve 29.1, the second proportional reversing valve 29.2, the rotating cylinder 30, the balance valve 31, the pressurized cylinder 32 and the hydraulic sensor 33. The hydraulic system adopts a double pump structure, that is, the drive motor 18 provides power for the first gear pump 19.1 and the second gear pump 19.2 at the same time. During the working process, the hydraulic oil is respectively passed into the rotary cylinder 30 through the first gear pump 19.1, the first non-return valve 20.1, the first pressure line filter 28.1, and the first proportional reversing valve 29.1 to provide power for the rotary swing hydraulic cylinder 1, and then flows back to the oil tank 13 after cooling and filtering through the first cooler 25.1 and the first return oil filter 26.1; the first pressure gauge 23.1 is connected to the first pressure measuring point 21.1 through the first pressure measuring hose 22.1 to measure the oil inlet pressure to obtain the working pressure of the rotary swing hydraulic cylinder 1, and the closed-loop control of the output torque of the rotary swing hydraulic cylinder 1 is realized through the first electromagnetic overflow valve 24.1. At the same time, the hydraulic oil is passed into the pressurized oil cylinder 32 through the second gear pump 19.2, the second non-return valve 20.2, the second pressure line filter 28.2, and the second proportional reversing valve 29.2 to provide power for the radial loading oil cylinder 61, and then flows back to the oil tank 13 after cooling and filtering through the balance valve 31, the second cooler 25.2, and the second return oil filter 26.2; an accumulator 27 is installed in the oil inlet pipeline to maintain the pressure of the hydraulic system and absorb pulsation and impact; the second pressure gauge 23.2 is connected to the second pressure measuring point 21.2 through the second pressure measuring hose 22.2 to measure the oil inlet pressure, and the hydraulic sensor 33 measures the oil outlet pressure to obtain the working pressure of the pressurized oil cylinder 32, and the closed-loop control of the radial loading force output by the radial loading oil cylinder 61 is realized through the second electromagnetic overflow valve 24.2.

[0009] The driving system includes a rotary swing hydraulic cylinder 1, a first coupling 2, a torque speed sensor 3, a second coupling 4, and a torque speed sensor support plate 9. The rotary swing hydraulic cylinder 1 is connected to one end of the torque speed sensor 3 through the first coupling 2, and the other end of the torque speed sensor 3 is connected to the main shaft 11 through the second coupling 4. The rotary swing hydraulic cylinder 1 is installed on the base plate 10, and the torque speed sensor 3 is installed on the base plate 10 through the torque speed sensor support plate 9. The torque speed sensor 3 is installed with a rotary encoder to measure the rotational torque and rotational life of the main shaft 11. The input and output modes of the rotary swing hydraulic cylinder 1 and the torque speed sensor 3 are both shafts. The rotary swing hydraulic cylinder 1, the torque speed sensor 3 and the main shaft 11 are connected in sequence through the first and second couplings 2 and 4 to realize power transmission and corresponding data collection.

[0010] The heating system achieves heating of the test bearing 66 through a heating box and a temperature control system. The heating box is customized to be designed with a loading hole at the corresponding position. The main shaft 11 passes through the loading hole and is connected to the second coupling 4, and the gap between the loading fixture and the loading hole wall is filled with heat-insulating materials for sealing and heat insulation. The main transmission system of the horizontal sliding bearing test bench is arranged in the heating box, and the test bearing 66 is heated to the test temperature through the heating system. Temperature sensors are installed in the shaft sleeve 12 and other parts inside the heating box to achieve real-time measurement and control of the temperature. At the same time, the outside of the heating box is covered with heat-insulating materials. The temperature radiated to the surrounding of the hydraulic cylinder is within the normal working range through the barrier of the heat-insulating materials, thereby ensuring the normal operation of the hydraulic system. And the two sides of the heating box are designed with openable and closable sealing covers to facilitate the replacement and debugging of the main shaft 11 and the test bearing 66 from both sides.

[0011] The radial loading system includes a radial loading cylinder 61, a tension pressure sensor 63, a cylinder support plate 62, a pull rod 67, a test bearing fixed bearing seat 65, a bearing seat support plate 64, and a shaft sleeve 12. Specifically, the cylinder support plate 62 and the bearing seat support plate 64 are plate-shaped structures arranged perpendicular to the radial loading system setting direction. The radial loading cylinder 61 is installed on the cylinder support plate 62. The tension pressure sensor 63 is installed on the output piston rod of the loading cylinder 61. The tension pressure sensor 63 is fixed on the bearing seat support plate 64 and is used to measure the output radial loading force of the radial loading cylinder 61 and realize closed-loop control through the hydraulic system. The fixed bearing seat 65 is installed on the bearing seat support plate 64 by bolts, and the test bearing 66 is installed on the fixed bearing seat 65 by a sleeve. The pull rod 67 is fixed on the bottom plate 10 parallel to the radial loading system direction, and passes through the bearing seat support plate 64 and the cylinder support plate 62 from bottom to top. The two ends of the bearing seat support plate 64 are slidably connected to the tie rods 67, and there are two tie rods 67. The two tie rods 67 are on both sides of the radial loading system, and form a closed rectangular structure through the bearing seat support plate 64 and the cylinder support plate 62. During the test, the test bearing 66 is installed on the main shaft 11 through the sleeve 12, and then the test bearing 66 is installed in the fixed bearing seat 65. The radial loading cylinder applies a loading force to the bearing seat support plate 64 and the test bearing fixed bearing seat 65 installed on the bearing seat support plate 64, thereby applying a radial load to the test bearing 66. Preferably, the sleeve 12 fixedly connected to the intermediate shaft section of the main shaft and the test bearing fixed bearing seat 65 can be adjusted in size according to the sliding bearing to be tested, so as to test sliding bearings of different sizes and models without changing the test bench.

[0012] The test bench bearing structure is a base plate 10 with a series of T-shaped mounting frames arranged parallel to the main axis direction, and slide grooves are formed between the mounting frames so that the rotary and swing hydraulic cylinder 1, cushion block 8, and torque and speed sensor support plate 9 of each component of the test bench can be slidably fixed on the base plate 10.

[0013] Furthermore, the base plate 10 is a cast iron base plate.

[0014] Furthermore, the rotary swing hydraulic cylinder in the hydraulic system is the preferred power source in the present invention. Any structure or structural combination that can provide power for the horizontal sliding bearing test bench should be considered to fall within the protection scope of the present invention, and the rotary swing hydraulic cylinder should not be used as a limitation to the protection scope of the present invention.

[0015] Furthermore, the sleeve 12 fixed to the intermediate shaft section of the main shaft 11 and the sleeve in the fixed bearing seat 65 are adjusted in size according to the test bearing 66, so that the test bearings 66 of different sizes and models can be tested without replacing the test bench.

[0016] Furthermore, considering that the coupling will be affected by high temperature during the test, and the torque is large and reciprocating alternating transmission is required, the first coupling 2 and the second coupling 4 are metal diaphragm couplings. The first coupling 2 and the second coupling 4 are flexible couplings, which can eliminate small structural and dimensional deviations while connecting the shafts and transmitting power. This buffering effect ensures that the tested bearing is tested under the action of a predetermined load amount and load direction, thereby improving the accuracy and safety of the test.

[0017] A method for using a horizontal sliding bearing test bench comprises the following steps:

[0018] Before the test, select a sleeve 12 and a test bearing fixed bearing seat 65 of corresponding size according to the size of the test bearing 66, install the sleeve 12 on the main shaft, and install the test bearing 66 on the sleeve 12, install and fix the main shaft 11 on the base plate 10 through the first support bearing 5 and the second support bearing 7, fix the test bearing fixed bearing seat 65 on the bearing seat support plate 64 in the radial loading system 6 and put it on the test bearing 66, connect the main shaft 11 to the torque and speed sensor 3 through the second coupling 4, and fix the torque and speed sensor 3 on the base plate 10 through the torque and speed sensor support plate 9, then connect the torque and speed sensor 3 to the rotary swing hydraulic cylinder 1 through the first coupling 2, and finally fix the rotary swing hydraulic cylinder 1 on the base plate 10.

[0019] During the test of the horizontal sliding bearing test bench, the rotary swing hydraulic cylinder 1 outputs power to the torque speed sensor 3 through the coupling, and the torque speed sensor 3 inputs power to the main shaft 11 through the coupling to realize rotation and data measurement. The radial loading force generated by the radial loading cylinder 61 is applied to the test bearing 66 through the bearing seat support plate 64 and the test bearing fixed bearing seat 65. The radial loading cylinder 61 and the cylinder support plate 61, the bearing seat support plate 64, the pull rod 67, and the test bearing 66 form a complete closed-loop structure. The heating system heats the test bearing 66 in the main transmission system of the horizontal sliding bearing test bench to the test temperature through the heating box and the temperature control system, thereby simulating high temperature working conditions. During the test, the torque and speed sensor 3 measures the spindle torque in real time, and the friction coefficient of the sliding bearing can be calculated through the torque; when the torque increases significantly and steadily, it can be determined that the test bearing 66 has already undergone bonding or severe wear and has exceeded its service life. The test is stopped and the rotary encoder added to the torque and speed sensor 3 is used to obtain the number of swings of the sliding bearing before bonding or severe wear occurs, thereby obtaining the service life of the test bearing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention can simulate a working environment under a specific high temperature, and the design of the sleeve and the bushing being replaceable can meet the test requirements of bearings of different sizes and models. The working condition simulation is accurate, the application range is wide, and the economy is good.

[0022] (2) The present invention can apply an adjustable and stable radial loading force to the test bearing, and the radial loading system has a reliable structure, and the test bearing can be easily disassembled and replaced, which is convenient for testing.

[0023] (3) The proportional reversing valve is used in the hydraulic system to realize closed-loop control of the spindle torque and radial load force, which reduces the errors caused by factors such as structural stress deformation and achieves high test accuracy.

[0024] (4) The horizontal sliding bearing test bench provided by the present invention has reliable structural connections and is easy to disassemble, and has high practicality and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0026] Figure 2 A schematic diagram of the main transmission system structure provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of the radial loading system provided by the present invention;

[0028] Figure 4 A schematic diagram of the hydraulic system provided by the present invention;

[0029] In the figure: 1 rotary swing hydraulic cylinder; 2 first coupling; 3 torque speed sensor; 4 second coupling; 5 first support bearing; 6 radial loading system; 7 second support bearing; 8 cushion block; 9 torque speed sensor support plate; 10 bottom plate; 11 main shaft; 12 sleeve; 61 radial loading cylinder; 62 cylinder support plate; 63 tension pressure sensor; 64 bearing seat support plate; 65 test bearing fixed bearing seat; 66 test bearing; 67 tie rod; oil tank 13; liquid level and temperature gauge 14; air filter 15; liquid level gauge 16; thermometer 17; drive motor 18; first gear pump 19.1; second gear pump 19.2; first check valve 20.1; second check valve 20.2; Valve 20.2; first pressure measuring contact 21.1; second pressure measuring contact 21.2; first pressure measuring hose 22.1; second pressure measuring hose 22.2; first pressure gauge 23.1; second pressure gauge 23.2; first electromagnetic overflow valve 24.1; second electromagnetic overflow valve 24.2; first cooler 25.1; second cooler 25.2; first return oil filter 26.1; second return oil filter 26.2; accumulator 27; first pressure line filter 28.1; second pressure line filter 28.2; first proportional reversing valve 29.1; second proportional reversing valve 29.2; rotary cylinder 30; balance valve 31; pressurized cylinder 32; hydraulic sensor 33. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and functions achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein are interpreted accordingly.

[0032] like Figure 1As shown, the horizontal sliding bearing test bench of the present invention tests the performance of the metal sliding bearing to be tested when it is in a horizontal position. The bearing test bench includes a main transmission system, a drive system, a heating system, a radial loading system 6, a hydraulic system and a test bench bearing structure. The test bearing 66 is installed on the main transmission system, the radial loading system 6 is installed on the main transmission system along the radial direction of the test bearing 66 and provides a radial load to the test bearing 66, the drive system provides power to realize the swing rotation of the main transmission system, and the heating system heats and controls the temperature of the test bearing 66 to realize the test of the test bearing 66, and the test bearing 66 is a metal sliding bearing.

[0033] The main transmission system of the test bench in this embodiment includes a main shaft 11, upper and lower split support bearings, a sleeve 12, and a cushion block 8, wherein the upper and lower split support bearings include a first support bearing 5 and a second support bearing 7. The main transmission system adopts an inverted structure, that is, the main shaft 11 is supported by the first support bearing 5 and the second support bearing 7 arranged on both sides, the support bearing and the cushion block 8 are fixedly mounted on the bottom plate 10 by bolts, the test bearing 66 is mounted in the middle section of the main shaft 11, and the radial loading system 6 directly applies a radial load to the test bearing 66.

[0034] The hydraulic system of the test bench in this embodiment provides power for the rotary swing hydraulic cylinder 1 and the radial loading cylinder 61 at the same time. The hydraulic system is integrated into a hydraulic station, including an oil tank 13, a liquid level and temperature gauge 14, an air filter 15, a liquid level gauge 16, a thermometer 17, a drive motor 18, a first gear pump 19.1, a second gear pump 19.2, a first non-return valve 20.1, a second non-return valve 20.2, a first pressure measuring contact 21.1, a second pressure measuring contact 21.2, a first pressure measuring hose 22.1, and a second pressure measuring hose 22. .2, a first pressure gauge 23.1, a second pressure gauge 23.2, a first electromagnetic overflow valve 24.1, a second electromagnetic overflow valve 24.2, a first cooler 25.1, a second cooler 25.2, a first return oil filter 26.1, a second return oil filter 26.2, an accumulator 27, a first pressure line filter 28.1, a second pressure line filter 28.2, a first proportional reversing valve 29.1, a second proportional reversing valve 29.2, a rotating cylinder 30, a balancing valve 31, a pressurizing cylinder 32 and a hydraulic sensor 33. The hydraulic system adopts a double pump structure, that is, the drive motor 18 provides power for the first gear pump 19.1 and the second gear pump 19.2 at the same time. During the working process, the hydraulic oil is respectively passed into the rotary cylinder 30 through the first gear pump 19.1, the first non-return valve 20.1, the first pressure line filter 28.1, and the first proportional reversing valve 29.1 to provide power for the rotary swing hydraulic cylinder 1, and then flows back to the oil tank 13 after cooling and filtering through the first cooler 25.1 and the first return oil filter 26.1; the first pressure gauge 23.1 is connected to the first pressure measuring point 21.1 through the first pressure measuring hose 22.1 to measure the oil inlet pressure to obtain the working pressure of the rotary swing hydraulic cylinder 1, and the closed-loop control of the output torque of the rotary swing hydraulic cylinder 1 is realized through the first electromagnetic overflow valve 24.1. At the same time, the hydraulic oil passes through the second gear pump 19.2, the second non-return valve 20.2, the second pressure line filter 28.2, and the second proportional reversing valve 29.2 into the pressurizing cylinder 32 to provide power for the radial loading cylinder 61, and then flows back to the oil tank 13 after cooling and filtering through the second cooler 25.2 and the second return oil filter 26.2; the second pressure gauge 23.2 is connected to the second pressure measuring point 21.2 through the second pressure measuring hose 22.2 to measure the oil inlet pressure, and the hydraulic sensor 33 measures the oil outlet pressure to obtain the working pressure of the pressurizing cylinder 32, and realizes the closed-loop control of the radial loading force output by the radial loading cylinder 61 through the first electromagnetic overflow valve 24.1.

[0035] The driving system of the test bench in this embodiment includes a rotary swing hydraulic cylinder 1, a first coupling 2, a torque speed sensor 3, a second coupling 4, and a torque speed sensor support plate 9. The rotary swing hydraulic cylinder 1 is connected to one end of the torque speed sensor 3 through the first coupling 2, and the other end of the torque speed sensor 3 is connected to the main shaft 11 through the second coupling 4. The rotary swing hydraulic cylinder 1 is installed on the base plate 10, and the torque speed sensor 3 is installed on the base plate 10 through the torque speed sensor support plate 9. The torque speed sensor 3 is installed with a rotary encoder to measure the rotation torque and rotation life of the main shaft 11. The input and output modes of the rotary swing hydraulic cylinder 1 and the torque speed sensor 3 are both shafts. The rotary swing hydraulic cylinder 1, the torque speed sensor 3 and the main shaft 11 are connected in sequence through the first and second couplings 2 and 4 to realize power transmission and corresponding data collection. Considering that the coupling will be affected by high temperature during the test, and the torque is large and reciprocating alternating transmission is required, the first coupling 2 and the second coupling 4 are metal diaphragm couplings. The first coupling 2 and the second coupling 4 are flexible couplings, which can eliminate slight structural and dimensional deviations while connecting shafts and transmitting power. This buffering effect ensures that the tested bearing is tested under the action of a predetermined load amount and load direction, thereby improving the accuracy and safety of the test.

[0036] The heating system of the test bench in this embodiment heats the test bearing 66 through a heating box and a temperature control system. The heating box is customized to be designed with a loading hole at the corresponding position. The main shaft 11 passes through the loading hole and is connected to the second coupling 4, and the gap between the loading tool and the loading hole wall is filled with aluminum silicate fiber cotton for sealing and heat insulation. That is, the main transmission system of the horizontal sliding bearing test bench is arranged in the heating box, and the test bearing 66 is heated to the test temperature through the heating system. Temperature sensors are installed in the shaft sleeve 12 and other parts inside the heating box to achieve real-time measurement and control of the temperature. At the same time, the outside of the heating box is covered with heat insulation material, and the temperature radiated to the surrounding of the hydraulic cylinder is controlled within 100°C through the barrier of the heat insulation material, thereby ensuring the normal operation of the hydraulic system. And the two sides of the heating box are designed with openable and closable sealing covers to facilitate the replacement and debugging of the main shaft 11 and the test bearing 66 from both sides. It should be noted that the heating box and the computer console connected thereto are not drawn in the figure.

[0037] The radial loading system of the test bench in this embodiment includes a radial loading cylinder 61, a tension pressure sensor 63, a cylinder support plate 62, a pull rod 67, a test bearing fixed bearing seat 65, a bearing seat support plate 64, and a shaft sleeve 12. Specifically, the cylinder support plate 62 and the bearing seat support plate 64 are plate-shaped structures arranged perpendicular to the radial loading system setting direction. The radial loading cylinder 61 is installed on the cylinder support plate 62. The tension pressure sensor 63 is installed on the output piston rod of the loading cylinder 61. The tension pressure sensor 63 is fixed on the bearing seat support plate 64 and is used to measure the output radial loading force of the radial loading cylinder 61 and realize closed-loop control through the hydraulic system. The fixed bearing seat 65 is installed on the bearing seat support plate 64 by bolts, and the test bearing 66 is installed on the fixed bearing seat 65 by a sleeve. The pull rod 67 is fixed on the bottom plate 10 parallel to the radial loading system direction, and passes through the bearing seat support plate 64 and the cylinder support plate 62 from bottom to top. The two ends of the bearing seat support plate 64 are slidably connected to the tie rods 67, and there are two tie rods 67. The two tie rods 67 are on both sides of the radial loading system, and form a closed rectangular structure through the bearing seat support plate 64 and the cylinder support plate 62. During the test, the test bearing 66 is installed on the main shaft 11 through the sleeve 12, and then the test bearing 66 is installed in the fixed bearing seat 65. The radial loading cylinder applies a loading force to the bearing seat support plate 64 and the test bearing fixed bearing seat 65 installed on the bearing seat support plate 64, thereby applying a radial load to the test bearing 66.

[0038] In order to facilitate the movable fixation of various components on the cast iron base plate 10, the test bench in this embodiment is preferably provided with a plurality of T-slots, and the components that need to be movably fixed are provided with bolt-type mounting frames to achieve movable fixation of various components on the cast iron base plate 10, thereby expanding the testable size range of the test bench.

[0039] During the test of the horizontal sliding bearing test bench, the rotary swing hydraulic cylinder 1 outputs power to the torque speed sensor 3 through the coupling, and the torque speed sensor 3 inputs power to the main shaft 11 through the coupling to realize rotation and data measurement. The radial loading force generated by the radial loading cylinder 61 is applied to the test bearing 66 through the bearing seat support plate 64 and the test bearing fixed bearing seat 65. The radial loading cylinder 61 and the cylinder support plate 61, the bearing seat support plate 64, the pull rod 67, and the test bearing 66 form a complete closed-loop structure. The heating system heats the test bearing 66 in the main transmission system of the horizontal sliding bearing test bench to the test temperature through the heating box and the temperature control system, thereby simulating high temperature working conditions. During the test, the torque and speed sensor 3 measures the spindle torque in real time, and the friction coefficient of the sliding bearing can be calculated through the torque; when the torque increases significantly and steadily, it can be determined that the test bearing 66 has already undergone bonding or severe wear and has exceeded its service life. The test is stopped and the rotary encoder added to the torque and speed sensor 3 is used to obtain the number of swings of the sliding bearing before bonding or severe wear occurs, thereby obtaining the service life of the test bearing.

[0040] Maximum radial load: 10t.

[0041] The rotary swing hydraulic cylinder outputs reciprocating swing motion with adjustable speed and amplitude. The swing speed and amplitude are controlled by controlling the flow of the hydraulic system. The standard speed is 90° every 15 seconds.

[0042] Finally, it is necessary to explain here that: although the patent of the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the patent of the present invention. Any technical personnel in this field can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the patent of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the patent of the present invention without departing from the content of the technical solution of the patent of the present invention shall fall within the protection scope of the technical solution of the patent of the present invention.

Claims

1. A horizontal sliding bearing test bench, characterized in that: The horizontal sliding bearing test bench comprises a main transmission system, a drive system, a heating system, a radial loading system (6), a hydraulic system and a test bench bearing structure; a test bearing (66) is installed on the main transmission system, the radial loading system (6) is installed on the main transmission system along the radial direction of the test bearing (66) and provides a radial load to the test bearing (66), the drive system provides power to realize the rotation of the main transmission system, and the heating system heats and controls the temperature of the test bearing (66) to realize the test of the test bearing (66).

2. A horizontal sliding bearing test bench according to claim 1, characterized in that: Specific: The main transmission system comprises a main shaft (11), upper and lower split support bearings, and a sleeve (12), wherein the upper and lower split support bearings comprise a first support bearing (5) and a second support bearing (7); the main transmission system adopts an inverted structure scheme, the main shaft (11) is supported by the first support bearing (5) and the second support bearing (7) arranged on both sides, and is fixed on the base plate (10), the test bearing (66) is arranged in the middle section of the main shaft (11), and the radial loading system (6) applies a radial load to the test bearing (66); the sleeve (12) is fixedly connected to the middle shaft section of the main shaft (11), and during the test process, friction occurs with the inner side of the test bearing (66) to simulate the friction of the test bearing (66) in actual working conditions; The hydraulic system adopts a double pump structure to provide power for the rotary swing hydraulic cylinder (1) and the radial loading cylinder (61), and the hydraulic system is integrated into a hydraulic station; The driving system comprises a rotary swing hydraulic cylinder (1), a first coupling (2), a torque speed sensor (3), a second coupling (4), and a torque speed sensor support plate (9); the rotary swing hydraulic cylinder (1) is connected to one end of the torque speed sensor (3) via the first coupling (2), the other end of the torque speed sensor (3) is connected to the main shaft (11) via the second coupling (4), the rotary swing hydraulic cylinder (1) is mounted on a base plate (10), and the torque speed sensor (3) is mounted on the base plate (10) via the torque speed sensor support plate (9); The heating system heats the test bearing (66) through a heating box and a temperature control system. The heating box is customized to have a loading hole at a corresponding position, and the main shaft (11) passes through the loading hole and is connected to the second coupling (4). The radial loading system comprises a radial loading cylinder (61), a tension pressure sensor (63), a cylinder support plate (62), a pull rod (67), a test bearing fixed bearing seat (65), a bearing seat support plate (64), and a shaft sleeve (12). Specifically, the cylinder support plate (62) and the bearing seat support plate (64) are plate-shaped structures arranged perpendicular to the setting direction of the radial loading system. The cylinder support plate (62) is installed with a radial loading cylinder (61), and the output piston rod of the loading cylinder (61) is installed with a tension pressure sensor. The pull pressure sensor (63) is fixed on the bearing seat support plate (64) and is used to measure the output radial loading force of the radial loading cylinder (61) and realize closed-loop control through the hydraulic system. The fixed bearing seat (65) is installed on the bearing seat support plate (64), and the test bearing (66) is installed on the fixed bearing seat (65) through a sleeve. The pull rod (67) is fixed on the bottom plate (10) parallel to the direction of the radial loading system and passes through the bearing seat support plate (64) and the cylinder support plate (62) from bottom to top. The test bench bearing structure is a bottom plate (10) provided with a series of T-shaped mounting frames arranged parallel to the main axis direction, and slide grooves are formed between the mounting frames, so that the rotary and swing hydraulic cylinders (1), cushion blocks (8), and torque and speed sensor support plates (9) of the test bench components can be slidably fixed on the bottom plate (10).

3. A horizontal sliding bearing test bench according to claim 2, characterized in that: The main transmission system also includes a cushion block (8), and the main shaft (11) is fixed on the base plate (10) through the cushion block (8).

4. A horizontal sliding bearing test bench according to claim 2, characterized in that: The test bearing (66) is a metal sliding bearing.

5. The horizontal sliding bearing test bench according to claim 2, characterized in that: By replacing the main shaft (11) and the shaft sleeve (12) of different sizes, it is possible to test test bearings (66) of different sizes.

6. A horizontal sliding bearing test bench according to claim 2, characterized in that: In the hydraulic system, the double pump structure is such that the driving motor 18 provides power to the first gear pump (19.1) and the second gear pump (19.2) at the same time. The hydraulic oil is respectively passed through the first gear pump (19.1), the first non-return valve (20.1), the first pressure pipeline filter (28.1) and the first proportional reversing valve (29.1) into the rotary cylinder (30) to provide power for the rotary swing hydraulic cylinder (1). The hydraulic oil is then cooled and filtered by the first cooler (25.1) and the first return oil filter (26.1) before flowing back to the oil tank (13). The first pressure gauge (23.1) is connected to the first pressure measuring point (21.1) through the first pressure measuring hose (22.1) to measure the oil inlet pressure to obtain the working pressure of the rotary swing hydraulic cylinder (1), and the first electromagnetic overflow valve (24.1) is used to realize the closed-loop control of the output torque of the rotary swing hydraulic cylinder (1). At the same time, the hydraulic oil The pressurized oil is passed into the pressurized oil cylinder (32) through the second gear pump (19.2), the second non-return valve (20.2), the second pressure pipeline filter (28.2) and the second proportional reversing valve (29.2) to provide power for the radial loading oil cylinder (61), and then flows back to the oil tank (13) after cooling and filtering through the balance valve (31), the second cooler (25.2) and the second return oil filter (26.2); an accumulator (27) is installed in the oil inlet pipeline to maintain the pressure of the hydraulic system and absorb pulsation and impact; the second pressure gauge (23.2) is connected to the second pressure measuring point (21.2) through the second pressure measuring hose (22.2) to measure the oil inlet pressure, and the hydraulic sensor (33) measures the oil outlet pressure to obtain the working pressure of the pressurized oil cylinder (32), and the second electromagnetic overflow valve (24.2) is used to realize the closed-loop control of the radial loading force output by the radial loading oil cylinder (61).

7. The horizontal sliding bearing test bench according to claim 2, characterized in that: The torque speed sensor (3) is equipped with a rotary encoder for measuring the rotational torque and rotational life of the main shaft (11); the rotary swing hydraulic cylinder (1), the torque speed sensor (3) and the main shaft (11) are sequentially connected via the first and second coupling shafts (2) and 4 to realize power transmission and data collection.

8. The horizontal sliding bearing test bench according to claim 2, characterized in that: In the heating system, the main transmission system of the horizontal sliding bearing test bench is arranged in a heating box, the test bearing (66) is heated to the test temperature by the heating system, and a temperature sensor is installed inside the heating box to achieve real-time measurement and control of the temperature; at the same time, a heat-insulating material is laid on the outside of the heating box, and openable and closable sealing covers are provided on both sides of the heating box for replacement and debugging of the main shaft (11) and the test bearing (66).

9. The horizontal sliding bearing test bench according to claim 2, characterized in that: In the radial loading system: the two ends of the bearing seat support plate (64) are slidably connected to the pull rods (67), the number of the pull rods (67) is 2, and the two pull rods (67) are on both sides of the radial loading system, forming a closed rectangular structure through the bearing seat support plate (64) and the cylinder support plate (62).

10. A horizontal sliding bearing test bench according to claim 2, characterized in that: The bottom plate (10) is a cast iron bottom plate.

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