A kind of oil seal pair performance test device and method

Abstract

The application discloses a kind of oil distribution sealing pair performance test device and method, and the oil distribution sealing pair performance test device in device is based on horizontal lathe and is built, first test mechanism, second test mechanism and oil leakage mechanism are set on lathe, make full use of the structure and function of horizontal lathe, realizes the integration of multiple test functions.This makes the device can complete different types of oil distribution sealing pair performance test on the same equipment, improves the versatility and applicability of equipment, reduces test cost and equipment floor area.Automatic cleaning and efficient operation: the rotating cleaning mechanism and extrusion filtering mechanism in oil leakage mechanism are driven by transmission system composed of motor, sector gear, gear ring, rack and gear, which realizes automatic cleaning and filtering operation.This automatic design not only reduces manual intervention, improves cleaning and filtering efficiency, but also ensures the stability and consistency of cleaning and filtering, ensures the efficient operation of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil seal pair performance test, and particularly relates to an oil seal pair performance test device and method. BACKGROUND

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

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

[0004] In terms of data acquisition and analysis, some test methods also have limitations. On the one hand, the precision of the sensors used is insufficient, which cannot accurately capture the subtle performance changes of the oil seal pair during work, such as small leakage and temperature fluctuations; on the other hand, the response speed of the data acquisition system is slow, which is difficult to track real-time changing working condition parameters, so that the collected data is missing or distorted. In addition, the data analysis method is relatively simple, only staying at the statistical level of basic parameters, lacking deep mining and correlation analysis of data, and it is difficult to deeply reveal the internal relationship between oil seal pair performance and various influencing factors, and cannot comprehensively evaluate its performance.

[0005] In addition, the stability and universality of the existing test devices need to be improved. Some devices are prone to problems such as component loosening and deformation 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 specific models or specifications of oil seal pairs, lacking universality, and cannot meet the diversified test needs, limiting its application range.

[0006] In summary, developing an oil seal pair performance test device and method that can comprehensively and realistically simulate actual working conditions, has high-precision data acquisition and analysis functions, and has good stability and universality, has important practical significance for improving the overall performance and reliability of hydraulic systems and promoting the technological progress of related industries. SUMMARY

[0007] The present application aims to provide an oil seal pair performance test device and method to solve the above technical problems.

[0008] To solve the above technical problems, the present application adopts the following technical solutions:

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

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

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

[0012] The horizontal lathe is provided with a first test mechanism;

[0013] Preferably, the first test 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 seal sleeve is sleeved on the first oil distribution shaft;

[0016] A first spacer ring is located between the two first oil distribution seal 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 on the first oil distribution seal sleeve;

[0018] A baffle is located on the right side of the first oil distribution shaft and is connected to the first oil distribution shaft through a screw;

[0019] A first column end straight joint penetrates through the first oil distribution seal sleeve and is fixedly connected to the first oil distribution seal sleeve.

[0020] Preferably, the oil leakage mechanism comprises an oil leakage tank, and the oil leakage tank is fixedly connected to the horizontal lathe;

[0021] A first chute is formed on the oil leakage tank, and a sliding bar is slidably connected inside the first chute, and a filter cover is fixedly connected to the sliding bar, and 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 rotating cleaning mechanism comprises a swing frame, and the swing frame is rotatably connected to the oil leakage tank;

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

[0024] The swing frame is fixedly connected with an air inlet pipe at the top and an air outlet pipe at the side, and one-way valves are arranged in the air inlet pipe and the air outlet pipe.

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

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

[0027] Preferably, a second sliding groove is formed in the second filter plate, a partition plate is fixedly connected in the second sliding groove, a sliding rod is fixedly connected to the partition plate, 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, a third rotating shaft is fixedly connected to the power output shaft of the motor, a sector gear is fixedly connected to the third rotating shaft, a gear ring is meshed with the sector gear, a first gear rack and a second gear rack are fixedly connected to the top and bottom of the gear ring respectively, third sliding grooves are formed in the first gear rack and the second gear rack, and limit blocks are slidably connected in the third sliding grooves.

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

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

[0031] The performance test method of the oil distribution sealing pair comprises the following steps:

[0032] S1: two sets of first oil distribution sealing sleeves are worn on the first oil distribution shaft, and the middle part is separated by a first partition ring; an oil distribution device support is additionally arranged on a horizontal machine tool, and the oil distribution device is fixed; one end of the first oil distribution shaft is clamped by a chuck, and the other end is supported by a center.

[0033] S2: pressure oil is supplied to oil ports A1, B1, A2 and B2.

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

[0035] YB, YD, Y1, Y2, Y3, Y4 electromagnet is powered at the same time, hydraulic oil enters the oil distribution seal pair A1, A2, B1, B2 through the electromagnetic valve, at this time the hydraulic pressure is 0.5MPA, this mode is the constant distance mode;

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

[0037] At this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair A1, A2 through the electromagnetic valve, B1, B2 has no oil, the duration is 1 minute, this mode is the distance adjustment ahead mode;

[0038] S5: After one minute after step S4 operation, change to YA, YD, Y2, Y4 powered on at the same time, at this time 9MPA pressure hydraulic oil enters the oil distribution seal pair B1, B2 through the electromagnetic valve, A1, A2 has no oil, the duration is 1 minute, this mode is the distance adjustment astern mode, reciprocating cycle.

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

[0040] 1. The oil distribution seal pair performance test device is based on a horizontal lathe, and a first test mechanism, a second test mechanism and an oil leakage mechanism are arranged on the lathe, so that the structure and function of the horizontal lathe are fully utilized, and the integration of various test functions is realized. This makes the device can complete different types of oil distribution seal pair performance test on the same equipment, improves the versatility and applicability of the equipment, reduces the test cost and equipment area.

[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 the test process in real time and accurately. Temperature is one of the important factors affecting the performance of the oil distribution seal pair, and by obtaining accurate temperature data, the performance of the oil distribution seal pair under different working conditions can be better analyzed, and reliable basis for optimizing seal design and improving seal performance is provided.

[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 with the horizontal machine tool, which facilitates the collection of the oil leakage generated during the test. The cooperation of the filter cover, rotating cleaning mechanism and extrusion filtering mechanism can effectively filter and clean the oil leakage. The rotating cleaning mechanism can clean the impurities on the filter cover in time through the movement of the swing frame, sliding column and first scraper, ensuring the filtering effect; the extrusion filtering mechanism can further extrude and filter the oil leakage through the cooperation of the second filter plate, first rotating shaft, conical gear and other components, improving the cleanliness of the oil leakage, realizing the recycling of the oil leakage, reducing the test cost and the pollution to the environment.

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

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

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

[0046] Figure 1 The structure schematic diagram of the embodiment 1 of the present application;

[0047] Figure 2 For Figure 1 sectional view at C-C;

[0048] Figure 3 is the hydraulic system schematic diagram of the embodiment 1 of the present application;

[0049] Figure 4 is the structural schematic diagram of the embodiment 2 of the present application;

[0050] Figure 5 For Figure 4 sectional view at E-E;

[0051] Figure 6 is the hydraulic system schematic diagram of the embodiment 2 of the present application;

[0052] Figure 7 is the structural schematic diagram of the oil drain mechanism of the present application;

[0053] Figure 8 is the internal structural schematic diagram of the oil drain tank of the present application;

[0054] Figure 9 For Figure 8 enlarged schematic diagram of A part;

[0055] Figure 10 is the connection schematic diagram of the gear ring and the motor of the present application;

[0056] Figure 11 is the connection schematic diagram of the filter cover and the swing frame of the present application;

[0057] Figure 12 is the internal structural schematic diagram of the swing frame of the present application;

[0058] Figure 13 is the connection schematic diagram of the filter plate and the second scraper of the present application.

[0059] Reference numerals: 1. First oil distribution shaft; 2. First oil distribution sealing sleeve; 3. First spacer; 4. First pin; 5. First washer; 6. First temperature sensor; 7. Baffle; 8. Screw; 9. Oil drain mechanism; 10. First column end straight connector; 1A. Second oil distribution shaft; 2A. Second oil distribution sealing sleeve; 3A. Second temperature sensor; 4A. Second pin; 5A. Second washer; 6A. Second column end straight connector; 7A. Shaft collar; 8A. Oil distributor bracket; 901. Oil drain tank; 902. Sliding bar; 903. Swing frame; 904. Filter cover; 905. First gear; 906. 907. Motor; 908. Filter plate; 909. First rotating shaft; 910. Connecting plate; 911. First bevel gear; 912. Second bevel gear; 913. Positioning seat; 914. Second rotating shaft; 915. Limiting block; 916. Third rotating shaft; 917. Mounting bracket; 918. First rack; 919. Gear ring; 920. Sector gear; 921. Second rack; 922. Second gear; 923. Air inlet pipe; 924. Air outlet pipe; 925. First scraper; 926. Spring; 927. Sliding column; 928. Second scraper; 929. Slide rod; 920. Partition plate. Detailed Implementation

[0060] To make the technical means, creative features, achieved objectives, and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

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

[0062] Example 1:

[0063] like Figures 1-3 As shown, a testing device for the performance of an oil-sealing pair includes a horizontal lathe.

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

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

[0066] The horizontal lathe is equipped with an oil draining mechanism 9.

[0067] The first testing facility includes:

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

[0069] The first oil distribution sealing sleeve 2 is sleeved on the first oil distribution shaft 1;

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

[0071] The first temperature sensor 6 is installed on 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 with the first oil distribution shaft 1 through the screw 8;

[0073] The first column end straight-through joint 10 penetrates through the first oil distribution sealing sleeve 2 and is fixedly connected with the first oil distribution sealing sleeve 2.

[0074] The test is carried out on a horizontal lathe. Considering that the maximum outer diameter of the oil seal pair is φ130, according to the existing equipment in the workshop, the CW6140 horizontal lathe is selected as the power source and the main mechanical bench, and the stepless speed regulation is realized by installing the frequency converter.

[0075] Through the performance test and life evaluation test of the hydraulic system of the test bed, the hydraulic system is divided into three working modes:

[0076] S1: two sets of first oil distribution sealing sleeves 2 are worn on the first oil distribution shaft 1, and the first spacer ring 3 is used to separate them. The oil distributor support is installed on the horizontal lathe, the oil distributor is fixed, one end of the first oil distribution shaft 1 is clamped by the chuck, and the other end is supported by the center.

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

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

[0079] The electromagnets YB, YD, Y1, Y2, Y3 and Y4 are powered at the same time, and the hydraulic oil enters the oil distribution sealing pairs A1, A2, B1 and B2 through the electromagnetic valve. At this time, the hydraulic pressure is 0.5MPA, and this mode is the constant distance mode;

[0080] S4: after one hour of operation in 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 sealing pairs A1 and A2 through the electromagnetic valve, and B1 and B2 have no oil inlet, and the duration is 1 minute. This mode is the distance adjustment forward mode;

[0082] S5: After one minute of the operation of step S4, YA, YD, Y2, Y4 are supplied with electricity at the same time, at this time, 9MPA pressure hydraulic oil enters the oil distribution seal pair B1, B2 through the electromagnetic valve, A1, A2 has no oil, the duration is 1 minute, this mode is the distance adjusting reverse mode, reciprocating cycle.

[0083] Determination of the basic scheme of the hydraulic system

[0084] Determination of the oil supply mode

[0085] In the working process of the hydraulic system, the driving motor drives the hydraulic pump to suck oil. The oil supply mode of the hydraulic pump is mainly divided into fixed displacement pump oil supply and variable displacement pump oil supply.

[0086] 1) Variable displacement pump oil supply

[0087] The shaft of the variable displacement pump adopts eccentric installation, the output flow can be automatically adjusted according to the pressure change (the size of the external load), the output flow is small when the pressure is high, and the output flow is large when the pressure is low, so the number of hydraulic elements is saved, thereby simplifying the oil circuit system, and the oil heating is reduced. The disadvantage is that the flow pulsation is serious, the system pressure is not very stable, the pump life is short, and the working noise is large.

[0088] 2) Fixed displacement pump oil supply

[0089] In the case of constant speed, the output flow of the fixed displacement pump is also constant. Using fixed displacement pump oil supply can make the flow of the hydraulic circuit more stable, and the working noise is small, but the required power is large.

[0090] The fixed displacement pump is also divided into single pump and double oil pump. The single pump only outputs one way of oil, and the double oil pump can output two independent hydraulic oils at the same time.

[0091] In the working process of the hydraulic system, since high and low pressure switching is required, a double fixed displacement pump oil supply mode is adopted to provide hydraulic oil for the main oil circuit. An electromagnetic overflow valve is connected at the pump outlet for adjusting the outlet pressure of the pump, that is, adjusting the valve opening of the electromagnetic overflow valve, and adjusting the output pressure of the pump to meet the working requirements.

[0092] 3) Determination of the pressure control scheme

[0093] The basic scheme of the hydraulic system can be used for testing various oil distributors. An electromagnetic overflow valve is connected at the pump outlet for adjusting the outlet pressure of the pump, that is, adjusting the valve opening of the electromagnetic overflow valve, and adjusting the output pressure of the pump to meet the working requirements. And through the electromagnetic reversing valve adjustment, the simulation distance adjusting requirement is realized.

[0094] 4) Determination of the circuit protection mode

[0095] The outlet pressure of the hydraulic pump is regulated by the electromagnetic relief valve, which is the maximum working pressure of the hydraulic circuit, ensuring that all hydraulic components in the hydraulic system do not overwork. When the external load changes suddenly, the electromagnetic relief valve also acts as a relief valve. An unloading relief valve is installed at the outlet to automatically release pressure when it is too high.

[0096] 5) Analysis of the working process

[0097] The hydraulic system of the oil distributor reliability test bench mainly consists of a hydraulic pump, an electromagnetic directional valve, an electromagnetic relief valve, a check valve, an unloading relief valve, and a lubricating oil circuit. The principle is shown in the figure above. Figure 7

[0098] For KL111 / 5 type oil distributor, in the test, by adjusting the electromagnetic relief valve at the outlet of the pump, the outlet pressure of the double pump is adjusted, YA and YC are adjusted to 9MPA, YB and YD are adjusted to 0.5MPA.

[0099] YB, YD, Y1, Y2, Y3, and Y4 electromagnets are powered at the same time, hydraulic oil enters the oil distributor internal structure through the electromagnetic valve at the A1, A2, B1, and B2 ports, and is discharged from both sides to the oil drain tank 901. At this time, the hydraulic oil leakage under the "steady distance" condition can be measured by the flow sensor.

[0100] After one hour, the other electromagnets are powered off, YA, YC, Y1, and Y3 are powered on at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distributor sealing pair A1 and A2 ports through the electromagnetic valve, and B1 and B2 ports have no oil. The duration is 1 minute, and this mode is the distance adjusting ahead mode. Hydraulic oil enters the oil distributor internal structure through the oil distributor A port, and is discharged from both sides to the oil drain tank 901. At this time, the hydraulic oil leakage under the "distance adjusting ahead" condition can be measured by the flow sensor.

[0101] After one minute, YA, YC, Y2, and Y4 are powered on at the same time, 9MPA pressure hydraulic oil enters the oil distributor sealing pair B1 and B2 ports through the electromagnetic valve, and A1 and A2 ports have no oil. The duration is 1 minute, and this mode is the distance adjusting astern mode. Hydraulic oil enters the oil distributor internal structure through the oil distributor B port, and is discharged from both sides to the oil drain tank 901. At this time, the hydraulic oil leakage under the "distance adjusting astern" condition can be measured by the flow sensor.

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

[0103] ​For the convenience of maintenance and monitoring of the hydraulic system, necessary detection elements are installed in the main sections of the system. The system is provided with a cooling system for cooling the oil temperature, a heating system for heating the oil temperature, an oil temperature detection and control system for controlling the hydraulic oil temperature, a temperature detection system provided with temperature sensors on the oil distribution sealing pair for real-time monitoring of the temperature of the oil distributor, a pressure detection system provided with pressure sensors at the outlet of the hydraulic pump, the oil inlet A1, A2, B1 and B2 of the oil distributor for real-time monitoring of the inlet pressure of the oil distributor and the outlet pressure of the pump, a flow detection system provided with flow sensors at the oil inlets A1, A2, B1 and B2 of the oil distributor for real-time monitoring of the oil inflow of the oil distributor, and direct detection of the leakage of the high-pressure sealing pair through the flow sensor reading, and a liquid level detection system for detecting the oil level of the oil tank

[0104] Example 2

[0105] As shown in Figures 4-6 the same as in Example 1, the difference between this embodiment and Example 1 is that:

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

[0107] The second oil distribution sealing sleeve 2A is worn on the second oil distribution shaft 1A and provided with a second column end straight through end on the top, separated by a second spacer, positioned by a shaft ring 7A on the rightmost side, and an oil distributor support 8A is added to the lathe to fix the oil distributor. The second oil distribution shaft 1A is clamped by a chuck at one end and held by a center rest at the other end. The oil ports A1, B1, A2 and B2 pass pressure oil, and the oil ports SP1 and SP2 pass low-pressure lubricating oil. The bottom is provided with an oil collection disc to recover the leaked oil back to the oil tank.

[0108] The performance test and life evaluation test are carried out through the hydraulic system of the test bench, and the hydraulic system is divided into three working modes.

[0109] 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.

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

[0111] 2) One hour later, the other electromagnet is powered off, and YA, YC, Y1 and Y3 are powered on at the same time. At this time, the 9MPA pressure hydraulic oil enters the second oil distribution seal sleeve 2AA1 and A2 through the electromagnetic valve, and B1 and B2 have no oil input, with a duration of 1 minute. This mode is the distance adjusting ahead mode.

[0112] 3) One minute later, YA, YC, Y2 and Y4 are powered on, at which time the 9MPA pressure hydraulic oil enters the second oil distribution seal sleeve 2AB1 and B2 through the electromagnetic valve, and A1 and A2 have no oil input, with a duration of 1 minute. This mode is the distance adjusting astern mode. The cycle is repeated.

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

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

[0115] Basic scheme of hydraulic system

[0116] (1) Determination of oil supply mode

[0117] During the operation of the hydraulic system, the driving motor 906 drives the hydraulic pump to suck 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 displacement pump oil supply

[0119] The shaft of the variable displacement pump is installed eccentrically, and the output flow can be automatically adjusted according to the pressure change (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. In this way, the number of hydraulic components is saved, thereby simplifying the oil circuit system, and the oil heating is reduced. The disadvantages are that the flow pulsation is serious, the system pressure is not very stable, the pump life is short, and the working noise is large.

[0120] 2) Fixed displacement pump oil supply

[0121] Under the condition of constant speed, the output flow of the fixed displacement pump is also constant. Using fixed displacement pump oil supply can make the flow of the hydraulic circuit more stable, and the working noise is small, but the required power is large.

[0122] Fixed displacement pumps are also divided into single pumps and double oil pumps. Single pumps only output one oil, and double oil pumps can simultaneously output two independent hydraulic oils.

[0123] In the working process of the hydraulic system, because of the high and low pressure switching back and forth, two independent double constant delivery pump oil supply mode is adopted to provide hydraulic oil for the main oil circuit. The pump outlet is connected with electromagnetic overflow valve, which is used to adjust the outlet pressure of the pump, that is, to adjust the valve opening of the electromagnetic overflow valve, and the output pressure of the pump is adjusted to meet the working requirements.

[0124] 3) Pressure control scheme determination

[0125] The basic scheme of the hydraulic system can be used for the test of various oil distributors. The pump outlet is connected with electromagnetic overflow valve, which is used to adjust the outlet pressure of the pump, that is, to adjust the valve opening of the electromagnetic overflow valve, and the output pressure of the pump is adjusted to meet the working requirements. And through the electromagnetic reversing valve adjustment, the simulation of distance adjustment requirements is realized.

[0126] 4) Loop protection mode determination

[0127] Through the electromagnetic overflow valve, the outlet pressure of the hydraulic pump is adjusted, that is, the maximum working pressure of the hydraulic circuit is adjusted, so as to ensure that each hydraulic element in the hydraulic system does not work overload. When the external load changes suddenly, the electromagnetic overflow valve also plays a role of overflow. The unloading overflow valve is arranged at the outlet, which automatically releases pressure when the pressure is too high.

[0128] 5) Working process analysis

[0129] The hydraulic system of the oil distributor reliability test bench mainly consists of hydraulic pump, electromagnetic reversing valve, electromagnetic overflow valve, check valve, unloading overflow valve and lubricating oil circuit. The principle is shown in the above Figure 7 .

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

[0131] YB, YD, Y1, Y2, Y3 and Y4 electromagnets are powered at the same time, hydraulic oil enters the oil distributor internal structure through the electromagnetic valve at the A1, A2, B1 and B2 ports, and is discharged from the T1 port to the oil tank 901. At this time, the hydraulic oil leakage amount in the "steady distance" state can be measured by the flow sensor.

[0132] After one hour, other electromagnets are powered off, YA, YC, Y1 and Y3 are powered on at the same time. At this time, 9MPA pressure hydraulic oil enters the oil distributor sealing pair A1 and A2 through the electromagnetic valve, and B1 and B2 have no oil inlet, and the duration is 1 minute. This mode is the distance adjustment ahead mode. The hydraulic oil enters the oil distributor internal structure through the A port of the oil distributor, and is discharged from the T1 port to the oil tank 901. At this time, the hydraulic oil leakage amount in the "distance adjustment ahead" state can be measured by the flow sensor.

[0133] One minute later, YA, YC, Y2, Y4 are powered at the same time, at this time, 9MPA pressure hydraulic oil enters the oil distribution sealing pair B1, B2 through the electromagnetic valve, A1, A2 has no oil, the duration is 1 minute, and this mode is the distance adjusting 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 oil drain tank 901. At this time, the hydraulic oil leakage amount in the "distance adjusting reverse" state can be measured by the flow sensor.

[0134] There is also a lubricating oil pump for supplying low-pressure lubricating oil to the oil distribution sealing pair SP port, and the oil pressure is controlled by a pilot relief valve, and the flow is adjusted by a tubular throttle valve.

[0135] And a liquid level sensor is arranged at the oil drain tank 901, when reaching the upper limit of the set liquid level, the oil pump automatically works to pump the oil in the oil drain tank 901 back to the main oil tank; when reaching the lower limit of the set liquid level, the oil pump automatically stops working.

[0136] In order to facilitate the maintenance and monitoring of the hydraulic system, necessary detection elements are arranged in the main sections of the system. The system is provided with a cooling system, a heating system, an oil temperature detection and control system, a temperature detection system, a pressure detection system, a flow detection system and a liquid level detection system.

[0137] Embodiment 3:

[0138] As shown in Figures 7-13 , in the case that other parts are the same as embodiment 1, the difference between this embodiment and embodiment 1 is that: preferably, the oil drain mechanism 9 comprises an oil drain tank 901, and the oil drain tank 901 is fixedly connected with the horizontal machine tool;

[0139] A first chute is formed on the oil drain tank 901, and a sliding bar 902 is slidably connected in the first chute. The sliding bar 902 is fixedly connected with a filter cover 904, and the filter cover 904 is provided with a rotating cleaning mechanism and an extrusion filtering mechanism.

[0140] The rotating cleaning mechanism comprises a swing frame 903, and the swing frame 903 is rotatably connected with the oil drain tank 901.

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

[0142] The swing frame 903 is fixedly connected to the air inlet pipe 922 at the top, and the air outlet pipe 923 is fixedly connected to the side of the swing frame 903. The air inlet pipe 922 and the air outlet pipe 923 are internally provided with one-way valves.

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

[0144] The first rotating shaft 908 is fixedly connected to the first bevel gear 910, which is meshed with the second bevel gear 911. The second bevel gear 911 is fixedly connected to the second rotating shaft 913, which is rotatably connected to the positioning seat 912. The positioning seat 912 is fixedly connected to the oil drain tank 901, and the second rotating shaft 913 penetrates 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 sliding groove, and the second sliding groove is internally fixedly connected to the partition plate 929. The partition plate 929 is fixedly connected to the sliding rod 928, and the sliding rod 928 is slidably connected to the sliding block. The sliding block is fixedly connected to the second scraper 927.

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

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

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

[0149] The starting 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 tooth ring 918 to move left and right reciprocating rod, so that the first rack 917 and the second rack 920 also move left and right reciprocating, so that the first gear 905 and the second gear 921 will be reciprocating rotation;

[0150] When the first gear 905 reciprocating rotation, the first gear 905 will drive the swing frame 903 reciprocating rotation, the swing frame 903 will drive the first scraper 924 rotation, so that the first scraper 924 will constantly clean the filter cover 904;

[0151] The second gear 921 reciprocating rotation, the second gear 921 will drive the second rotating shaft 913 rotation, the second rotating shaft 913 through the first bevel gear 910, the second bevel gear 911 drive the first rotating shaft 908, the first rotating shaft 908 drive the connecting plate 909, the filter plate 907 constantly swing;

[0152] When the filter plate 907 swing, the filter plate 907 will extrude the filter cover 904, so that the filter cover 904 will constantly move up and down, up and down can help the oil permeation, accelerate filtration, and the filter cover 904 is extruded will make the sliding column 926 constantly extrude the gas in the swing frame 903, make the gas high pressure discharge, so that can help further promote the oil permeation, and the first scraper 924 is extruded still can rotate, so that can better clean the filter cover 904;

[0153] The filter plate 907 constantly swing, can guide the oil flow, and can further make some impurities are cleaned out, and the filter plate 907 in the swing process, because the second scraper 927 on the built-in counterweight block, in the inclined state, by the gravity can be good to make it move, so as to clean the impurities, and the oil filter can further play the role of lubrication, promote its movement.

[0154] The above shows and describes the basic principle of the present application, the main features and advantages of the present application. The person skilled in the art should understand that the present application is not limited to the above examples, the above examples and the description described in the specification is only the preferred example of the present application, and is not intended to limit the present application, without departing from the spirit and scope of the present application, the present application will have various changes and improvements, these changes and improvements all fall within the scope of the present application claimed. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A testing device for the performance of an oil-sealing pair, comprising a horizontal lathe, characterized in that: The horizontal lathe is equipped with a first testing mechanism; The horizontal lathe is equipped with a second testing mechanism; The horizontal lathe is equipped with an oil draining mechanism (9). The first testing facility includes: 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 bedroom lathe. The first oil distribution sealing sleeve (2) is sleeved on the first oil distribution shaft (1); The first spacer (3) is located between the two first oil distribution sealing sleeves (2) and sleeved on the first oil distribution shaft (1). The first spacer (3) is connected to the first oil distribution shaft (1) through the first pin (4) and the first washer (5). The first temperature sensor (6) is installed in the first oil distribution sealing sleeve (2); 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) by screws (8); The first column end straight connector (10) passes through the first oil distribution sealing sleeve (2) and is fixedly connected to the first oil distribution sealing sleeve (2); The second test mechanism includes: a second oil distribution shaft (1A) and a second oil distribution sealing sleeve (2A); The second oil distribution sealing sleeve (2A) is threaded onto the second oil distribution shaft (1A) and a second column end straight end is provided on it. It is separated in the middle by a second spacer ring and positioned on the far right by a shaft collar (7A). An oil distributor bracket (8A) is added to the machine tool to fix the oil distributor. A temperature sensor is installed on the oil distribution sealing pair to monitor the temperature of the oil distributor in real time; pressure sensors are installed at the hydraulic pump outlet and the hydraulic oil inlets A1, A2, B1, and B2 of the oil distributor to monitor the inlet pressure of the oil distributor and the outlet pressure of the pump in real time; flow sensors are installed at the hydraulic oil inlets A1, A2, B1, and B2 of the oil distributor to monitor the oil flow rate of the oil distributor in real time; and a level sensor is installed at the drain tank (901). The oil draining mechanism (9) includes an oil draining tank (901), which is fixedly connected to the horizontal machine tool; The oil drain tank (901) is provided with a first sliding groove, and a sliding strip (902) is slidably connected inside the first sliding groove. A filter cover (904) is fixedly connected to the sliding strip (902). A rotating cleaning mechanism is provided inside the filter cover (904), and a squeezing filter mechanism is provided at the bottom of the filter cover (904). The rotating cleaning mechanism includes a swing frame (903), which is rotatably connected to the 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) by a spring (925); a first scraper (924) is fixedly connected to the bottom end of the sliding column (926), and the scraper is in contact with the filter cover (904); The extrusion filtration 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 drain tank (901).

2. The oil mixing and sealing pair performance testing device according to claim 1, characterized in that: 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 equipped with one-way valves.

3. The oil mixing and sealing pair performance testing device according to claim 2, characterized in that: A first bevel gear (910) is fixedly connected to the first rotating shaft (908), a second bevel gear (911) meshes 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 positioning seat (912) is fixedly connected to the drain tank (901), and the second rotating shaft (913) passes through the drain tank (901) and is rotatably connected to the drain tank (901).

4. The oil mixing and sealing pair performance testing device according to claim 3, characterized in that: The second filter plate (907) has a second groove, and a partition plate (929) is fixedly connected inside the second groove. A slide rod (928) is fixedly connected to the partition plate (929), and a slider is slidably connected to the slide rod (928). A second scraper (927) is fixedly connected to the slider.

5. The oil mixing and sealing pair performance testing device according to claim 4, characterized in that: A mounting bracket (916) is fixedly connected to the oil drain tank (901), a motor (906) is fixedly connected to the mounting bracket (916), a third rotating shaft (915) is fixedly connected to the power output shaft of the motor (906), a sector gear (919) is fixedly connected to the third rotating shaft (915), a gear ring (918) meshes with the sector gear (919), a first rack (917) and a second rack (920) are fixedly connected to the top and bottom of the gear ring (918) respectively, and a third sliding groove is provided on both the first rack (917) and the second rack (920), and a limit block (914) is slidably connected inside the third sliding groove. 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 rotatably connected to the second rotating shaft (913).

6. A method for testing the performance of an oil mixing sealing pair using the oil mixing sealing pair performance testing apparatus according to any one of claims 1-5, comprising the following steps: S1: Put two sets of first oil distribution sealing sleeves (2) on the first oil distribution shaft (1), separate them in the middle with the first spacer (3), add an oil distribution bracket and fix the oil distributor on the horizontal machine tool, clamp one end of the first oil distribution shaft (1) with a chuck and support the other end with a center. S2: Connect pressurized oil to ports A1, B1, A2, and B2; S3: Start the motor and adjust the outlet pressure of the dual pump through the electromagnetic overflow valve. Adjust YA and YC to 9MPa and YB and YD to 0.5MPa. When electromagnets YB, YD, Y1, Y2, Y3, and Y4 are energized simultaneously, hydraulic oil enters the oil distribution sealing pairs A1, A2, B1, and B2 through the solenoid valves. At this time, the hydraulic pressure is 0.5 MPa, and this mode is the steady-pitch mode. S4: One hour after step S3 is performed, the other electromagnets are de-energized, and YA, YC, Y1, and Y3 are energized simultaneously. At this time, 9MPA pressure hydraulic oil enters the oil distribution sealing pair A1 and A2 ports through the solenoid valve, and no oil enters B1 and B2 ports. This lasts for 1 minute. This mode is the adjustable distance normal driving mode. S5: One minute after step S4, YA, YD, Y2, and Y4 are simultaneously energized. At this time, 9MPA hydraulic oil enters the oil distribution sealing pair B1 and B2 through the solenoid valve, and no oil enters A1 and A2. This lasts for 1 minute. This mode is the adjustable distance reversing mode, which repeats in a cycle.

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