Device and method for testing performance of oil distribution sealing pair

Abstract

The invention discloses an oil distribution sealing pair performance test device and method, the oil distribution sealing pair performance test device in the device is built based on a horizontal lathe, a first test mechanism, a second test mechanism and an oil drainage mechanism are arranged on the lathe, the structure and functions of the horizontal lathe are fully utilized, and integration of multiple test functions is realized. Therefore, the device can complete performance tests of different types of oil distribution sealing pairs on the same equipment, the universality and applicability of the equipment are improved, and the test cost and the occupied area of the equipment are reduced. Automatic cleaning and efficient operation are achieved, specifically, a rotary cleaning mechanism and an extrusion filtering mechanism in the oil drainage mechanism are driven by a transmission system composed of a motor, a sector gear, a gear ring, a rack, a gear and the like, and automatic cleaning and filtering operation is achieved. By means of the automatic design, manual intervention is reduced, the cleaning and filtering efficiency is improved, the stability and consistency of cleaning and filtering can be guaranteed, and efficient operation of the device is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of oil distribution seal pair performance testing, and in particular to an oil distribution seal pair performance testing device and method. Background Art

[0002] In modern industrial hydraulic systems, the performance of oil distribution seals as key components directly determines the system's efficiency, reliability and service life. From the perspective of energy utilization, efficient oil distribution seals can reduce energy loss and improve the overall energy efficiency of the system; in terms of industrial production continuity, stable and reliable oil distribution seal performance can reduce equipment failure rates and avoid production stagnation caused by downtime for maintenance, thereby ensuring the smooth progress of production activities.

[0003] However, the existing oil distribution seal performance test methods and devices have many problems that need to be solved. In terms of simulating actual working conditions, most devices are difficult to accurately reproduce complex and changeable working conditions. For example, in actual work, the oil distribution seal may be affected by dynamic loads in different directions, uneven distribution of temperature fields, and erosion of impurity particles in the oil. However, existing devices can only simulate a single parameter and cannot comprehensively consider these complex factors, resulting in a large deviation between the test results and the actual application conditions, and cannot provide a reliable basis for product optimization design and performance evaluation.

[0004] At the data collection and analysis level, some test methods also have limitations. On the one hand, the accuracy of the sensors used is insufficient to accurately capture the subtle performance changes of the oil distribution seal during operation, such as small leakage and temperature fluctuations; on the other hand, the data acquisition system has a slow response speed and it is difficult to track rapidly changing operating parameters in real time, resulting in missing or distorted data. In addition, the data analysis method is relatively simple, only staying at the statistical level of basic parameters, lacking in-depth mining and correlation analysis of the data, making it difficult to deeply reveal the intrinsic relationship between the performance of the oil distribution seal and various influencing factors, and unable to comprehensively evaluate its performance.

[0005] In addition, the stability and versatility of existing test devices need to be improved. Some devices are prone to loosening and deformation of parts during long-term operation, affecting the accuracy and repeatability of the test; at the same time, the structural design of the device is often targeted at oil distribution seals of specific models or specifications, lacking versatility and unable to meet diverse testing needs, limiting its scope of application.

[0006] In summary, the development of an oil distribution seal performance test device and method that can comprehensively and truly simulate actual working conditions, has high-precision data acquisition and analysis functions, and has good stability and versatility is of great practical significance for improving the overall performance and reliability of the hydraulic system and promoting technological progress in related industries. Summary of the invention

[0007] The purpose of the present invention is to provide an oil distribution seal performance test device and method to solve the above technical problems.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] An oil distribution seal performance test device, comprising a horizontal lathe,

[0010] The horizontal lathe is provided with a first testing mechanism;

[0011] The horizontal lathe is provided with a second testing mechanism;

[0012] An oil drain mechanism is installed on the horizontal lathe.

[0013] Preferably, the first testing mechanism comprises:

[0014] A first oil distribution shaft is located on the horizontal lathe, and the left end of the first oil distribution shaft is clamped by the horizontal lathe;

[0015] A first oil distribution sealing sleeve, sleeved on the first oil distribution shaft;

[0016] A first spacer ring is located between the two first oil distribution sealing sleeves and is sleeved on the first oil distribution shaft, and the first spacer ring is connected to the first oil distribution shaft through a first pin and a first washer;

[0017] A first temperature sensor is installed in the first oil distribution sealing sleeve;

[0018] A baffle, located on the right side of the first oil distribution shaft and connected to the first oil distribution shaft by screws;

[0019] The first column end straight-through joint passes through the first oil distribution sealing sleeve and is fixedly connected to the first oil distribution sealing sleeve.

[0020] Preferably, the oil drain mechanism comprises an oil drain tank, and the oil drain tank is fixedly connected to the horizontal machine tool;

[0021] The oil drain tank is provided with a first slide groove, a slide bar is slidably connected inside the first slide groove, a filter cover is fixedly connected to the slide bar, a rotating cleaning mechanism is arranged inside the filter cover, and an extrusion filtering mechanism is arranged at the bottom of the filter cover.

[0022] Preferably, the rotary cleaning mechanism comprises a swing frame, and the swing frame is rotatably connected to the oil drain tank;

[0023] The swing frame is slidably connected with a sliding column, the sliding column is connected to the swing frame through a spring, and a first scraper is fixed on the bottom end of the sliding column, and the scraper is in contact with the filter cover;

[0024] An air inlet pipe is fixedly connected to the top of the swing frame, and an air outlet pipe is fixedly connected to the side of the swing frame. Both the air inlet pipe and the air outlet pipe are equipped with one-way valves.

[0025] Preferably, the extrusion filtering mechanism comprises a second filter plate, the bottom of the second filter plate is fixedly connected to a connecting plate, the connecting plate is rotatably connected to a first rotating shaft, and the first rotating shaft is slidably connected to the oil drain tank;

[0026] A first bevel gear is fixedly connected to the first rotating shaft, a second bevel gear is meshed with the first bevel gear, a second rotating shaft is fixedly connected to the second bevel gear, a positioning seat is rotatably connected to the second rotating shaft, the rotating seat is fixedly connected to the oil drain tank, and the second rotating shaft passes through the oil drain tank and is rotatably connected to the oil drain tank.

[0027] Preferably, a second chute is provided on the second filter plate, a partition is fixedly connected inside the second chute, a sliding rod is fixedly connected to the partition, a sliding block is slidably connected to the sliding rod, and a second scraper is fixedly connected to the sliding block.

[0028] Preferably, the oil drain tank is fixedly connected with a mounting frame, the mounting frame is fixedly connected with a motor, the power output shaft of the motor is fixedly connected with a third rotating shaft, the third rotating shaft is fixedly connected with a sector gear, the sector gear is meshed with a gear ring, the top and bottom of the gear ring are respectively fixedly connected with a first rack and a second rack, the first rack and the second rack are both provided with a third slide groove, and a limiting block is slidably connected inside the third slide groove;

[0029] The first rack is meshed with a first gear, and the first gear is fixedly connected to the swing frame;

[0030] The second rack is meshed with a second gear, and the second gear is rotatably connected to the second rotating shaft.

[0031] The oil distribution seal performance test method includes the following steps:

[0032] S1: Put two sets of first oil distribution sealing sleeves on the first oil distribution shaft, separate them with the first spacer ring, add the oil distributor bracket on the horizontal machine tool, fix the oil distributor, clamp one end of the first oil distribution shaft with a chuck, and support the other end with a center;

[0033] S2: Connect the pressure oil to ports A1, B1, A2, and B2;

[0034] S3: Start the motor and adjust the outlet pressure of the double pump through the electromagnetic overflow valve, YA and YC are adjusted to 9MPA, and YB and YD are adjusted to 0.5MPA;

[0035] YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the oil distribution seal pair A1, A2, B1, and B2 ports through the solenoid valve. At this time, the hydraulic pressure is 0.5MPA, and this mode is the stable distance mode;

[0036] S4: One hour after step S3, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered on at the same time;

[0037] At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair A1 and A2 through the solenoid valve, and no oil enters the B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment forward mode.

[0038] S5: One minute after step S4, YA, YD, Y2, and Y4 are energized at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair B1 and B2 ports through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment and reverse mode, a reciprocating cycle.

[0039] The beneficial effects of the present invention are:

[0040] 1. The oil distribution seal performance test device of the present invention is built on a horizontal lathe, and a first test mechanism, a second test mechanism and an oil leakage mechanism are set on the lathe, making full use of the structure and function of the horizontal lathe and realizing the integration of multiple test functions. This enables the device to complete different types of oil distribution seal performance tests on the same device, improves the versatility and applicability of the device, and reduces the test cost and equipment footprint.

[0041] Accurate monitoring and data acquisition: The first temperature sensor in the first test mechanism is installed on the first oil distribution seal sleeve, which can monitor the temperature change of the oil distribution seal sleeve in real time and accurately during the test. Temperature is one of the important factors affecting the performance of the oil distribution seal pair. By obtaining accurate temperature data, the performance of the oil distribution seal pair under different working conditions can be better analyzed, providing a reliable basis for optimizing the seal design and improving the seal performance.

[0042] Oil leakage treatment and recycling: The setting of the oil leakage mechanism effectively solves the problem of oil leakage treatment during the test. The oil leakage tank is fixedly connected to the horizontal machine tool to facilitate the collection of oil leakage generated during the test. The cooperation of the filter cover, the rotating cleaning mechanism and the extrusion filtering mechanism can effectively filter and clean the oil leakage. The rotating cleaning mechanism cleans the impurities on the filter cover in time through the movement of the swing frame, the sliding column and the first scraper to ensure the filtering effect; the extrusion filtering mechanism further squeezes and filters the oil leakage through the synergistic effect of the second filter plate, the first rotating shaft, the bevel gear and other components, improves the cleanliness of the oil leakage, realizes the recycling of the oil leakage, and reduces the test cost and pollution to the environment.

[0043] Automatic cleaning and efficient operation: The rotating cleaning mechanism and extrusion filtering mechanism in the oil leakage mechanism are driven by a transmission system consisting of a motor, a sector gear, a gear ring, a rack and a gear, realizing automatic cleaning and filtering operations. This automated design not only reduces manual intervention and improves cleaning and filtering efficiency, but also ensures the stability and consistency of cleaning and filtering, ensuring efficient operation of the device.

[0044] 2. The performance test method of the oil distribution seal pair simulates various working conditions of the oil distribution seal pair in actual work, such as the steady distance mode, the distance adjustment forward mode and the distance adjustment reverse mode, by setting different electromagnet power combinations and pressure parameters. This test method that simulates the real working conditions can more accurately evaluate the performance of the oil distribution seal pair under different working conditions, and provide a more practical reference for the design and optimization of the oil distribution seal pair. The test method clearly stipulates the operation sequence, time and parameter setting of each step, forming a set of scientific and standardized test procedures. This standardized test process ensures the accuracy and repeatability of the test results, makes the data between different tests comparable, and is conducive to the objective evaluation and analysis of the performance of the oil distribution seal pair. During the test, the outlet pressure of the double pump can be adjusted by the electromagnetic overflow valve to realize the flexible control of the inlet and outlet pressure of the oil distribution seal pair. Tests under different pressure conditions can more comprehensively examine the sealing performance, pressure resistance and reliability of the oil distribution seal pair, and provide more extensive performance data support for the design and application of the oil distribution seal pair.

[0045] By testing the oil distribution seal pair in different modes, the performance changes of the oil distribution seal pair under different working conditions can be observed and analyzed, and potential faults and problems can be discovered in time. For example, in the forward and reverse modes of the adjustable distance, the sealing effect of the oil distribution seal pair under pressure in different directions can be tested to find out possible leakage points and weak links, so as to optimize and improve the oil distribution seal pair in a targeted manner and improve its performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0047] Figure 2 for Figure 1 Sectional view at CC;

[0048] Figure 3 This is a schematic diagram of a hydraulic system according to Embodiment 1 of the present invention;

[0049] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0050] Figure 5 for Figure 4 Sectional view at EE;

[0051] Figure 6 This is a schematic diagram of a hydraulic system according to Embodiment 2 of the present invention;

[0052] Figure 7 It is a structural schematic diagram of the oil leakage mechanism of the present invention;

[0053] Figure 8 It is a schematic diagram of the internal structure of the oil drain tank of the present invention;

[0054] Fig. 9 for Figure 8 A magnified schematic diagram of part A;

[0055] Fig.10 It is a schematic diagram of the connection between the gear ring and the motor of the present invention;

[0056] Fig.11 It is a schematic diagram of the connection between the filter cover and the swing frame of the present invention;

[0057] Fig.12 It is a schematic diagram of the internal structure of the swing frame of the present invention;

[0058] Fig.13 It is a schematic diagram of the connection between the filter plate and the second scraper of the present invention.

[0059] Figure numerals: 1, first oil distribution shaft; 2, first oil distribution sealing sleeve; 3, first spacer; 4, first pin; 5, first gasket; 6, first temperature sensor; 7, baffle; 8, screw; 9, oil leakage mechanism; 10, first column end straight joint; 1A, second oil distribution shaft; 2A, second oil distribution sealing sleeve; 3A, second temperature sensor; 4A, second pin; 5A, second gasket; 6A, second column end straight joint; 7A, shaft ring; 8A, oil distributor bracket; 901, oil leakage tank; 902, slide bar; 903, swing frame; 904, filter cover; 905, first gear; 906 , motor; 907, filter plate; 908, first rotating shaft; 909, connecting plate; 910, first bevel gear; 911, second bevel gear; 912, positioning seat; 913, second rotating shaft; 914, limit block; 915, third rotating shaft; 916, mounting frame; 917, first rack; 918, gear ring; 919, sector gear; 920, second rack; 921, second gear; 922, air inlet pipe; 923, air outlet pipe; 924, first scraper; 925, spring; 926, sliding column; 927, second scraper; 928, sliding rod; 929, partition. DETAILED DESCRIPTION

[0060] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0061] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0062] Embodiment 1:

[0063] like Figure 1-3 As shown, an oil distribution seal performance test device includes a horizontal lathe,

[0064] The horizontal lathe is provided with a first testing mechanism;

[0065] The horizontal lathe is provided with a second testing mechanism;

[0066] An oil drain mechanism 9 is installed on the horizontal lathe.

[0067] The first testing institutions include:

[0068] The first oil distribution shaft 1 is located on the horizontal lathe, and the left end of the first oil distribution shaft 1 is clamped by the horizontal lathe;

[0069] A first oil distribution sealing sleeve 2, sleeved on the first oil distribution shaft 1;

[0070] The first spacer 3 is located between the two first oil distribution sealing sleeves 2 and is sleeved on the first oil distribution shaft 1. The first spacer 3 is connected to the first oil distribution shaft 1 through a first pin 4 and a first washer 5;

[0071] A first temperature sensor 6 is installed in the first oil distribution sealing sleeve 2;

[0072] The baffle 7 is located on the right side of the first oil distribution shaft 1 and is connected to the first oil distribution shaft 1 through a screw 8;

[0073] The first column end straight-through connector 10 passes through the first oil distribution sealing sleeve 2 and is fixedly connected to the first oil distribution sealing sleeve 2 .

[0074] This test was carried out on a horizontal lathe. Considering that the maximum outer diameter of this type of oil seal pair is φ130, based on the existing equipment in the workshop, the CW6140 horizontal lathe was selected as the power source and the main mechanical bench, and stepless speed regulation was achieved by adding a frequency converter.

[0075] The hydraulic system of this test bench is used for performance test and life evaluation test. The hydraulic system is divided into three working modes:

[0076] S1: Put two sets of first oil distribution sealing sleeves 2 on the first oil distribution shaft 1, separate them with the first spacer 3, add the oil distributor bracket on the horizontal machine tool, fix the oil distributor, clamp one end of the first oil distribution shaft 1 with a chuck, and support the other end with a top;

[0077] S2: Connect the pressure oil to ports A1, B1, A2, and B2;

[0078] S3: Start the motor and adjust the outlet pressure of the double pump through the electromagnetic overflow valve, YA and YC are adjusted to 9MPA, and YB and YD are adjusted to 0.5MPA;

[0079] YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the oil distribution seal pair A1, A2, B1, and B2 ports through the solenoid valve. At this time, the hydraulic pressure is 0.5 MPA, and this mode is the stable distance mode;

[0080] S4: One hour after step S3, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered on at the same time;

[0081] At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair A1 and A2 through the solenoid valve, and no oil enters the B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment forward mode.

[0082] S5: One minute after step S4, YA, YD, Y2, and Y4 are energized at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair B1 and B2 ports through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment and reverse mode, a reciprocating cycle.

[0083] The basic scheme of hydraulic system is determined

[0084] Fuel supply method determined

[0085] During the operation of the hydraulic system, the drive motor drives the hydraulic pump to absorb oil. The oil supply methods of the hydraulic pump are mainly divided into fixed-displacement pump oil supply and variable-displacement pump oil supply.

[0086] 1) Variable pump oil supply

[0087] The shaft of the variable pump is installed eccentrically, and the output flow can be automatically adjusted according to the pressure change of the system (the size of the external load). When the pressure is high, the output flow is small, and when the pressure is low, the output flow is large. This saves the number of hydraulic components, simplifies the oil system, and reduces oil heating. The disadvantages are severe flow pulsation, unstable system pressure, short pump life, and high working noise.

[0088] 2) Metering pump oil supply

[0089] When the speed is constant, the output flow of the metering pump is also constant. Using a metering pump to supply oil can make the flow of the hydraulic circuit more stable and the working noise is small, but the required power is larger.

[0090] Dosing pumps are also divided into single pumps and double pumps. A single pump only outputs one path of oil, while a double pump can output two independent paths of hydraulic oil at the same time.

[0091] During the operation of this hydraulic system, since high and low pressures need to be switched back and forth, two independent double-connected quantitative pumps are used to supply hydraulic oil to the main oil circuit. An electromagnetic overflow valve is connected to the pump outlet to adjust the pump outlet pressure, that is, to adjust the valve opening of the electromagnetic overflow valve to adjust the pump output pressure to meet the working requirements.

[0092] 3) Determination of pressure control scheme

[0093] This basic scheme of hydraulic system can be used for testing various types of oil distributors. An electromagnetic overflow valve is connected to the pump outlet to adjust the pump outlet pressure, that is, to adjust the valve opening of the electromagnetic overflow valve to adjust the pump output pressure to meet the working requirements. And through the electromagnetic reversing valve adjustment, the simulated distance adjustment requirements can be achieved.

[0094] 4) Determine the circuit protection method

[0095] The outlet pressure of the hydraulic pump, i.e. the maximum working pressure of the hydraulic circuit, is adjusted through the electromagnetic relief valve to ensure that the hydraulic components in the hydraulic system work without overload. When the external load suddenly changes, the electromagnetic relief valve also plays a role of overflow. An unloading relief valve is set at the outlet to automatically release the pressure when the pressure is too high.

[0096] 5) Work process analysis

[0097] The hydraulic system of the oil distributor reliability test bench is mainly composed of the hydraulic pump electromagnetic reversing valve, electromagnetic overflow valve, one-way valve, unloading overflow valve and lubricating oil circuit. The principle is as above Figure 7 shown.

[0098] For the KL111 / 5 oil distributor, during the test, the outlet pressure of the duplex pump was adjusted by adjusting the electromagnetic overflow valve at the pump outlet, and YA and YC were adjusted to 9MPA, and YB and YD were adjusted to 0.5MPA.

[0099] YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the oil distribution seal pair A1, A2, B1, and B2 through the solenoid valve, enters the internal structure of the oil distributor, and is discharged from both sides to the drain tank 901. At this time, the hydraulic oil leakage in the "stable distance" state can be measured by the flow sensor.

[0100] After one hour, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered at the same time. At this time, the 9MPA pressure hydraulic oil enters the oil distribution seal pair A1 and A2 through the solenoid valve, and there is no oil in the B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment and forward driving mode. The hydraulic oil enters the internal structure of the oil distributor through the A port of the oil distributor, and is discharged from and from both sides to the drain tank 901. At this time, the hydraulic oil leakage in the "distance adjustment and forward driving" state can be measured by the flow sensor.

[0101] After one minute, YA, YC, Y2, and Y4 are energized at the same time. At this time, the 9MPA pressure hydraulic oil enters the oil distribution seal pair B1 and B2 through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment reverse mode. The hydraulic oil enters the internal structure of the oil distributor through the B port of the oil distributor, and is discharged from the two sides to the drain tank 901. At this time, the hydraulic oil leakage in the "pitch adjustment reverse" state can be measured by the flow sensor.

[0102] A liquid level sensor is set at the oil drain tank 901. When the set liquid level upper limit is reached, the oil return pump automatically works to pump the oil in the oil drain tank 901 back to the main oil tank; when the set liquid level lower limit is reached, the oil return pump automatically stops working.

[0103] To facilitate the maintenance and monitoring of the hydraulic system, necessary detection elements should be installed in the main sections of the system. The system is also equipped with a cooling system to cool the oil temperature; a heating system to heat the oil temperature; an oil temperature detection and control system to control the hydraulic oil temperature; a temperature detection system to set a temperature sensor on the oil distribution seal pair to monitor the temperature of the oil distributor in real time; a pressure detection system to set pressure sensors at the hydraulic pump outlet and the oil distributor hydraulic oil inlet A1, A2, B1, B2 to monitor the oil distributor inlet pressure and the pump outlet pressure in real time; a flow detection system to set flow sensors at the oil distributor hydraulic oil inlet A1, A2, B1, B2 to monitor the oil distributor oil intake in real time, and the leakage of the high-pressure sealing pair can be directly detected through the flow sensor indication. A liquid level detection system is provided to detect the oil level in the oil tank.

[0104] Embodiment 2:

[0105] like Figure 4-6 As shown, when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that:

[0106] This test was carried out on a horizontal lathe. Considering that the maximum outer diameter of this type of oil seal pair is φ680, based on the existing equipment in the workshop, the CW6180 horizontal lathe was selected as the power source and the main mechanical bench, and stepless speed regulation was achieved by adding a frequency converter.

[0107] Put the second oil distribution seal sleeve 2A on the second oil distribution shaft 1A and set the second column end straight through end on it, separate it with the second spacer in the middle, and position it with the shaft ring 7A on the far right. Add the oil distributor bracket 8A on the machine tool to fix the oil distributor. One end of the second oil distribution shaft 1A is clamped with a chuck, and the other end is supported by a center frame. Oil ports A1, B1, A2, B2 are connected to pressure oil, and oil ports SP1 and SP2 are connected to low-pressure lubricating oil. An oil receiving pan is provided at the bottom to recover the leaked oil back to the oil tank.

[0108] The hydraulic system of this test bench is used for performance tests and life evaluation tests. The hydraulic system is divided into three working modes.

[0109] Start the motor and adjust the outlet pressure of the duplex pump through the electromagnetic relief valve, YA and YC to 9MPA, and YB and YD to 0.5MPA.

[0110] 1) YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the second oil distribution sealing sleeve 2AA1, A2, B1, and B2 ports through the solenoid valve. At this time, the hydraulic pressure is 0.5MPA, and this mode is the stable distance mode.

[0111] 2) One hour later, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered at the same time. At this time, 9MPA pressure hydraulic oil enters the second oil distribution seal 2AA1 and A2 ports through the solenoid valve, and there is no oil inflow at B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment forward mode.

[0112] 3) One minute later, YA, YC, Y2, and Y4 are energized at the same time. At this time, 9MPA pressure hydraulic oil enters the second oil distribution seal 2AB1 and B2 ports through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment reverse mode. Reciprocating cycle.

[0113] There is also a lubricating oil pump to supply low-pressure lubricating oil to the SP port of the oil distribution seal pair.

[0114] The leaked oil returns to the oil drain tank 901 from the T port, and a liquid level sensor is set at the oil drain tank 901. When the set liquid level upper limit is reached, the oil return pump automatically works to pump the oil in the oil drain tank 901 back to the main oil tank; when the set liquid level lower limit is reached, the oil return pump automatically stops working.

[0115] The basic scheme of hydraulic system is determined

[0116] (1) Determination of fuel supply method

[0117] During the operation of the hydraulic system, the driving motor 906 drives the hydraulic pump to absorb oil. The oil supply mode of the hydraulic pump is mainly divided into fixed-displacement pump oil supply and variable-displacement pump oil supply.

[0118] 1) Variable pump oil supply

[0119] The shaft of the variable pump is installed eccentrically, and the output flow can be automatically adjusted according to the pressure change of the system (the size of the external load). When the pressure is high, the output flow is small, and when the pressure is low, the output flow is large. This saves the number of hydraulic components, simplifies the oil system, and reduces oil heating. The disadvantages are severe flow pulsation, unstable system pressure, short pump life, and high working noise.

[0120] 2) Metering pump oil supply

[0121] When the speed is constant, the output flow of the metering pump is also constant. Using a metering pump to supply oil can make the flow of the hydraulic circuit more stable and the working noise is small, but the required power is larger.

[0122] Dosing pumps are also divided into single pumps and double pumps. A single pump only outputs one path of oil, while a double pump can output two independent paths of hydraulic oil at the same time.

[0123] During the operation of this hydraulic system, since high and low pressures need to be switched back and forth, two independent double-connected quantitative pumps are used to supply hydraulic oil to the main oil circuit. An electromagnetic overflow valve is connected to the pump outlet to adjust the pump outlet pressure, that is, to adjust the valve opening of the electromagnetic overflow valve to adjust the pump output pressure to meet the working requirements.

[0124] 3) Determination of pressure control scheme

[0125] This basic scheme of hydraulic system can be used for testing various types of oil distributors. An electromagnetic overflow valve is connected to the pump outlet to adjust the pump outlet pressure, that is, to adjust the valve opening of the electromagnetic overflow valve to adjust the pump output pressure to meet the working requirements. And through the electromagnetic reversing valve adjustment, the simulated distance adjustment requirements can be achieved.

[0126] 4) Determine the circuit protection method

[0127] The outlet pressure of the hydraulic pump, i.e. the maximum working pressure of the hydraulic circuit, is adjusted through the electromagnetic relief valve to ensure that the hydraulic components in the hydraulic system work without overload. When the external load suddenly changes, the electromagnetic relief valve also plays a role of overflow. An unloading relief valve is set at the outlet to automatically release the pressure when the pressure is too high.

[0128] 5) Work process analysis

[0129] The hydraulic system of the oil distributor reliability test bench is mainly composed of the hydraulic pump electromagnetic reversing valve, electromagnetic overflow valve, one-way valve, unloading overflow valve and lubricating oil circuit. The principle is as above Figure 7 shown.

[0130] For the 132XF2 / 5 oil distributor, during the test, the outlet pressure of the duplex pump was adjusted by adjusting the electromagnetic overflow valve at the pump outlet, and YA and YC were adjusted to 9MPA, and YB and YD were adjusted to 0.5MPA.

[0131] YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the oil distribution seal pair A1, A2, B1, and B2 through the solenoid valve, enters the internal structure of the oil distributor, and is discharged from the TI port to the drain tank 901. At this time, the hydraulic oil leakage in the "stable distance" state can be measured by the flow sensor.

[0132] One hour later, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair A1 and A2 through the solenoid valve, and no oil enters the B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment and forward driving mode. The hydraulic oil enters the internal structure of the oil distributor through the A port of the oil distributor, and is discharged from the T1 port to the oil drain tank 901. At this time, the hydraulic oil leakage in the "distance adjustment and forward driving" state can be measured by the flow sensor.

[0133] After one minute, YA, YC, Y2, and Y4 are energized at the same time. At this time, the 9MPA pressure hydraulic oil enters the oil distribution seal pair B1 and B2 through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment reverse mode. The hydraulic oil enters the internal structure of the oil distributor through the B port of the oil distributor and is discharged from T1 to the drain tank 901. At this time, the hydraulic oil leakage in the "pitch adjustment reverse" state can be measured by the flow sensor.

[0134] There is also a lubricating oil pump to supply low-pressure lubricating oil to the SP port of the oil distribution seal pair. The oil pressure is controlled by a pilot relief valve, and the flow rate is adjusted once by a tubular throttle valve.

[0135] A liquid level sensor is set at the oil drain tank 901. When the set liquid level upper limit is reached, the oil return pump automatically works to pump the oil in the oil drain tank 901 back to the main oil tank; when the set liquid level lower limit is reached, the oil return pump automatically stops working.

[0136] In order to facilitate the maintenance and monitoring of the hydraulic system, necessary detection elements should be installed in the main sections of the system. The system is also equipped with a cooling system to cool the oil temperature; a heating system to heat the oil temperature; an oil temperature detection and control system to control the hydraulic oil temperature; a temperature detection system, a temperature sensor is set on the oil distribution seal pair to monitor the temperature of the oil distributor in real time; a pressure detection system, a pressure sensor is set at the hydraulic pump outlet and the oil distributor hydraulic oil inlet A1, A2, B1, B2 respectively, to monitor the oil distributor inlet pressure and the pump outlet pressure in real time; a flow detection system, a flow sensor is set at the oil distributor hydraulic oil inlet A1, A2, B1, B2 respectively, to monitor the oil inlet volume of the oil distributor in real time, and the leakage of its high-pressure sealing pair is directly detected through the flow sensor indication. A liquid level detection system is set to detect the oil level in the oil tank.

[0137] Embodiment 3:

[0138] like Figure 7-13 As shown, when other parts are the same as those of Example 1, the difference between this embodiment and Example 1 is that: preferably, the oil drain mechanism 9 includes an oil drain tank 901, and the oil drain tank 901 is fixedly connected to the horizontal machine tool;

[0139] The oil drain tank 901 is provided with a first slide groove, a slide bar 902 is slidably connected inside the first slide groove, a filter cover 904 is fixedly connected to the slide bar 902, a rotating cleaning mechanism is provided inside the filter cover 904, and an extrusion filtering mechanism is provided at the bottom of the filter cover 904.

[0140] The rotary cleaning mechanism includes a swing frame 903, which is rotatably connected to the oil drain tank 901;

[0141] A sliding column 926 is slidably connected to the swing frame 903, and the sliding column 926 is connected to the swing frame 903 through a spring 925. A first scraper 924 is fixed to the bottom end of the sliding column 926, and the scraper is in contact with the filter cover 904;

[0142] An air inlet pipe 922 is fixedly connected to the top of the swing frame 903 , and an air outlet pipe 923 is fixedly connected to the side of the swing frame 903 . Both the air inlet pipe 922 and the air outlet pipe 923 are installed with a one-way valve.

[0143] The extrusion filtering mechanism includes a second filter plate 907, a connecting plate 909 is fixedly connected to the bottom of the second filter plate 907, a first rotating shaft 908 is rotatably connected to the connecting plate 909, and the first rotating shaft 908 is slidably connected to the oil drain tank 901;

[0144] A first bevel gear 910 is fixedly connected to the first rotating shaft 908, a second bevel gear 911 is meshed with the first bevel gear 910, a second rotating shaft 913 is fixedly connected to the second bevel gear 911, a positioning seat 912 is rotatably connected to the second rotating shaft 913, the rotating seat 912 is fixedly connected to the oil drain tank 901, and the second rotating shaft 913 passes through the oil drain tank 901 and is rotatably connected to the oil drain tank 901.

[0145] The second filter plate 907 is provided with a second slide groove, a partition plate 929 is fixedly connected inside the second slide groove, a sliding rod 928 is fixedly connected to the partition plate 929, a sliding block is slidably connected to the sliding rod 928, and a second scraper 927 is fixedly connected to the sliding block.

[0146] The oil drain tank 901 is fixedly connected with a mounting frame 916, and the mounting frame 916 is fixedly connected with a motor 906. The power output shaft of the motor 906 is fixedly connected with a third rotating shaft 915, and the third rotating shaft 915 is fixedly connected with a sector gear 919, and the sector gear 919 is meshed with a gear ring 918. The top and bottom of the gear ring 918 are respectively fixedly connected with a first rack 917 and a second rack 920. The first rack 917 and the second rack 920 are both provided with a third slide groove, and the third slide groove is slidably connected with a limit block 914;

[0147] The first rack 917 is meshed with a first gear 905, and the first gear 905 is fixedly connected to the swing frame 903;

[0148] The second rack 920 is meshed with a second gear 921 , and the second gear 921 is rotatably connected to the second rotating shaft 913 .

[0149] Start the motor 906, the motor 906 drives the third rotating shaft 915, the third rotating shaft 915 drives the sector gear 919 to rotate, the sector gear 919 drives the gear ring 918 to move the rod back and forth, so that the first rack 917 and the second rack 920 will also continuously move back and forth, so that the first gear 905 and the second gear 921 will continuously rotate back and forth;

[0150] When the first gear 905 rotates back and forth, the first gear 905 drives the swing frame 903 to rotate back and forth, and the swing frame 903 drives the first scraper 924 to rotate, so that the first scraper 924 can continuously clean the filter cover 904;

[0151] When the second gear 921 rotates back and forth, the second gear 921 drives the second rotating shaft 913 to rotate, and the second rotating shaft 913 drives the first rotating shaft 908 through the first bevel gear 910 and the second bevel gear 911, and the first rotating shaft 908 drives the connecting plate 909 and the filter plate 907 to swing continuously;

[0152] When the filter plate 907 swings, the filter plate 907 will squeeze the filter cover 904, so that the filter cover 904 will continuously move up and down, which can help the oil to penetrate and accelerate the filtration. The filter cover 904 being squeezed will also cause the sliding column 926 to continuously squeeze the gas in the swing frame 903, so that the gas is discharged at high pressure, which can help to further promote the penetration of the oil. The first scraper 924 can still rotate after being squeezed, so that the filter cover 904 can be better cleaned.

[0153] The continuous swinging of the filter plate 907 can guide the flow of oil and further clean out some impurities. During the swinging process, the filter plate 907 can be moved well by gravity in an inclined state due to the built-in counterweight block on the second scraper 927, thereby cleaning out impurities. The oil filtration can further lubricate and promote its movement.

[0154] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oil distribution seal performance test device, comprising a horizontal lathe, characterized in that: The horizontal lathe is provided with a first testing mechanism; The horizontal lathe is provided with a second testing mechanism; The horizontal lathe is equipped with an oil drain mechanism (9).

2. The oil distribution seal performance test device according to claim 1 is characterized in that: The first test institution includes: A first oil distribution shaft (1) is located on the horizontal lathe, and the left end of the first oil distribution shaft (1) is clamped by the horizontal lathe; A first oil distribution sealing sleeve (2), sleeved on the first oil distribution shaft (1); A first spacer (3), located between the two first oil distribution sealing sleeves (2) and sleeved on the first oil distribution shaft (1), wherein the first spacer (3) is connected to the first oil distribution shaft (1) via a first pin (4) and a first washer (5); A first temperature sensor (6) is installed on the first oil distribution sealing sleeve (2); A baffle (7) located on the right side of the first oil distribution shaft (1) and connected to the first oil distribution shaft (1) via a screw (8); The first column end straight-through joint (10) passes through the first oil distribution sealing sleeve (2) and is fixedly connected to the first oil distribution sealing sleeve (2).

3. The oil distribution seal performance test device according to claim 1 is characterized in that: The oil drain mechanism (9) comprises an oil drain tank (901), and the oil drain tank (901) is fixedly connected to the horizontal machine tool; The oil drain tank (901) is provided with a first slide groove, a slide bar (902) is slidably connected inside the first slide groove, a filter cover (904) is fixedly connected to the slide bar (902), a rotating cleaning mechanism is arranged inside the filter cover (904), and an extrusion filtering mechanism is arranged at the bottom of the filter cover (904).

4. The oil distribution seal performance test device according to claim 3 is characterized in that: The rotary cleaning mechanism comprises a swing frame (903), and the swing frame (903) is rotatably connected to the oil drain tank (901); A sliding column (926) is slidably connected to the swing frame (903), and the sliding column (926) is connected to the swing frame (903) via a spring (925). A first scraper (924) is fixed to the bottom end of the sliding column (926), and the scraper is in contact with the filter cover (904); An air inlet pipe (922) is fixedly connected to the top of the swing frame (903), and an air outlet pipe (923) is fixedly connected to the side of the swing frame (903). Both the air inlet pipe (922) and the air outlet pipe (923) are installed with a one-way valve.

5. The oil distribution seal performance test device according to claim 4 is characterized in that: The extrusion filtering mechanism comprises a second filter plate (907), the bottom of the second filter plate (907) is fixedly connected to a connecting plate (909), the connecting plate (909) is rotatably connected to a first rotating shaft (908), and the first rotating shaft (908) is slidably connected to the oil drain tank (901); The first rotating shaft (908) is fixedly connected to a first bevel gear (910), the first bevel gear (910) is meshed with a second bevel gear (911), the second bevel gear (911) is fixedly connected to a second rotating shaft (913), the second rotating shaft (913) is rotatably connected to a positioning seat (912), the rotating seat (912) is fixedly connected to the oil drain tank (901), and the second rotating shaft (913) passes through the oil drain tank (901) and is rotatably connected to the oil drain tank (901).

6. The oil distribution seal performance test device according to claim 5 is characterized in that: The second filter plate (907) is provided with a second slide groove, a partition plate (929) is fixedly connected inside the second slide groove, a sliding rod (928) is fixedly connected to the partition plate (929), a sliding block is slidably connected to the sliding rod (928), and a second scraper (927) is fixedly connected to the sliding block.

7. The oil distribution seal performance test device according to claim 6 is characterized in that: The oil drain tank (901) is fixedly connected with a mounting frame (916), the mounting frame (916) is fixedly connected with a motor (906), the power output shaft of the motor (906) is fixedly connected with a third rotating shaft (915), the third rotating shaft (915) is fixedly connected with a sector gear (919), the sector gear (919) is meshed with a gear ring (918), the top and bottom of the gear ring (918) are respectively fixedly connected with a first rack (917) and a second rack (920), the first rack (917) and the second rack (920) are both provided with a third sliding groove, and the third sliding groove is slidably connected with a limiting block (914); The first rack (917) is meshed with a first gear (905), and the first gear (905) is fixedly connected to the swing frame (903); The second rack (920) is meshed with a second gear (921), and the second gear (921) is rotationally connected to the second rotating shaft (913).

8. The oil distribution seal performance test method according to any one of claims 1 to 7, comprising the following steps: S1: Put two sets of first oil distribution sealing sleeves (2) on the first oil distribution shaft (1), separate them with a first spacer (3), add an oil distribution device bracket on the horizontal machine tool, fix the oil distribution device, clamp one end of the first oil distribution shaft (1) with a chuck, and support the other end with a center; S2: Connect the pressure oil to ports A1, B1, A2, and B2; S3: Start the motor and adjust the outlet pressure of the double pump through the electromagnetic overflow valve, YA and YC are adjusted to 9MPA, and YB and YD are adjusted to 0.5MPA; YB, YD, Y1, Y2, Y3, and Y4 electromagnets are energized at the same time, and the hydraulic oil enters the oil distribution seal pair A1, A2, B1, and B2 ports through the solenoid valve. At this time, the hydraulic pressure is 0.5MPA, and this mode is the stable distance mode; S4: One hour after step S3, the other electromagnets are powered off, and YA, YC, Y1, and Y3 are powered on at the same time; At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair A1 and A2 through the solenoid valve, and no oil enters the B1 and B2 ports. The duration is 1 minute. This mode is the distance adjustment forward mode. S5: One minute after step S4, YA, YD, Y2, and Y4 are energized at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair B1 and B2 ports through the solenoid valve, and no oil enters the A1 and A2 ports. The duration is 1 minute. This mode is the pitch adjustment and reverse mode, a reciprocating cycle.

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