Reciprocating sealing experiment device capable of comparing and testing leakage rate and friction force at high temperature

Abstract

The utility model provides a reciprocating sealing experiment device capable of comparing and testing leakage rate and friction force at high temperature. The reciprocating sealing experiment device comprises a test bench assembly, an operation table and a hydraulic pump station, the operating platform is connected with the test bench assembly and the hydraulic pump station, and the test bench assembly is connected with the hydraulic pump station; the test bench assembly comprises a driving part, a pull pressure sensor, a piston sealing test tool, a rod sealing test tool and a mounting bench. The driving part can simultaneously drive the two sets of sealing test tools for testing; the two testing pistons arranged in the piston sealing testing tool are respectively provided with the testing sealing pieces with different structures, and the piston rod with an internal hole channel is used for constructing completely same testing conditions, so that comparison testing data are accurate and effective.

Description

Technical Field

[0001] The utility model relates to the field of sealing component testing experiments, in particular to a reciprocating sealing experimental device capable of performing high-temperature comparative testing of leakage rate and friction force. Background Art

[0002] When testing seals, the leakage rate and friction are usually tested. Leakage rate test: The main function of the seal is to prevent material leakage during use. The leakage rate test is designed to check whether the product meets its design requirements under normal use and expected use conditions. By measuring the leakage, we can understand the leakage that may occur in the actual application of the product, which helps to improve the reliability and safety of the product, reduce the risk of environmental pollution, and protect the interests of users and the environment. Friction test: Seals need to withstand a certain degree of force and friction during use. The friction test mainly examines the durability, stability and wear resistance of the seal under various working conditions, which helps us evaluate the performance of the product during long-term use, thereby providing a basis for product design optimization. Testing the leakage rate and friction of seals is an important means to ensure product quality and performance, which helps to improve product performance and reduce losses caused by quality problems.

[0003] The current sealing component testing experimental equipment has the following problems: 1. Only a single piece is tested each time. When doing comparative tests on seals with different structures or different materials, the test needs to be repeated. However, the test conditions and environment cannot be guaranteed to be completely consistent for the two times, which affects the accuracy of the test and makes the test cycle longer. 2. The test can only be carried out at room temperature, which is quite different from the temperature environment during actual use, affecting the effectiveness of the test and the evaluation of the performance of the seal. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems and provide a reciprocating seal experimental device capable of comparatively testing leakage rate and friction force at high temperature. The device can install test seals of different structures on two test pistons arranged in a piston seal test fixture, or test two sets of the same test fixtures at the same time. The piston rod with an internal hole is used to construct the completely same test conditions of a single set of test fixtures, so that the comparative test data is accurate and effective, and the test efficiency is doubled. The high temperature test can be smoothly implemented by adopting an independent high temperature test oil tank and selecting high temperature resistant hydraulic components to construct a test circuit.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A reciprocating seal experimental device capable of performing high temperature comparative tests on leakage rate and friction force comprises a test bench assembly, an operating table and a hydraulic pump station; the operating table is connected to the test bench assembly and the hydraulic pump station, and the test bench assembly is connected to the hydraulic pump station; the test bench assembly comprises: a driving component, a first tensile pressure sensor and a second tensile pressure sensor, a first sealing test fixture, a second sealing test fixture and a mounting bench; the first tensile pressure sensor is arranged on the driving component, the first tensile pressure sensor is connected to the first sealing test fixture, the second tensile pressure sensor is arranged on the driving component, and the second tensile pressure sensor is connected to the second sealing test fixture; the hydraulic pump station comprises: a driving hydraulic circuit and a test hydraulic circuit; the driving hydraulic circuit comprises a driving oil pump, a driving pipeline oil filter, a driving safety valve, a proportional relief valve, a servo proportional valve, a first temperature sensor, a second heater and a driving oil tank, the first temperature sensor and the second heater The device is arranged on the driving oil tank, the driving oil tank is connected to the driving oil pump, the driving oil pump is connected to the driving pipeline oil filter, the driving pipeline oil filter is connected to the servo proportional valve, the servo proportional valve is connected to the driving safety valve, and the driving safety valve is connected to the proportional overflow valve; the test hydraulic circuit includes a load oil pump, a test oil tank, an oil cooler, a first heater, a second temperature sensor, a test pipeline oil filter, a return oil filter, a load safety valve, a first electromagnetic stop valve, a second electromagnetic stop valve and a load pressure regulating valve, the first heater and the second temperature sensor are arranged on the test oil tank, the oil cooler is connected to the test oil tank, the test oil tank is connected to the load oil pump, the load oil pump is connected to the test pipeline oil filter, the test pipeline oil filter is connected to the load safety valve, the test oil tank is connected to the return oil filter, the return oil filter is connected to the first electromagnetic stop valve, and the second electromagnetic stop valve is connected to the first electromagnetic stop valve.

[0007] Further, the first sealing test tool is a piston sealing test tool, the second sealing test tool is a rod sealing test tool, the first tension and pressure sensor is connected to the piston sealing test tool, and the second tension and pressure sensor is connected to the rod sealing test tool.

[0008] Further, the piston seal test tooling includes a connecting ear, a piston rod, a test end cover, a cylinder barrel, a first test piston, a second test piston, an end cover, a first test seal, a second test seal and a locking nut; the connecting ear is connected to the piston rod, the test end cover is connected to the cylinder barrel, the piston rod passes through the test end cover and extends into the cylinder barrel, the piston rod is connected to the first test piston, the second test piston and the locking nut, the cylinder barrel is connected to the end cover, the first test seal is connected to the first test piston, and the second test seal is connected to the second test piston.

[0009] Furthermore, the first tension and pressure sensor is threadedly connected to the driving component.

[0010] Further, the first tension pressure sensor is connected to the piston seal test fixture pin.

[0011] Furthermore, the second tension and pressure sensor is threadedly connected to the driving component.

[0012] Furthermore, the second tension and pressure sensor is connected to the rod sealing test fixture pin.

[0013] Furthermore, the connecting lug is threadedly connected to the piston rod.

[0014] Furthermore, the test end cover is threadedly connected to the cylinder barrel.

[0015] Furthermore, the piston rod passes through the first test piston and the second test piston in the cylinder and is threadedly connected to the locking nut.

[0016] Furthermore, the piston rod is provided with an internal channel.

[0017] Further, the first sealing test tool is a piston sealing test tool, the second sealing test tool is a rod sealing test tool, the first tension and pressure sensor is connected to the piston sealing test tool, and the second tension and pressure sensor is connected to the rod sealing test tool.

[0018] The positive effects of the reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature are as follows:

[0019] The driving component of the utility model can drive two sets of sealing test tools for testing at the same time, and can change the combination of the sealing test tools, that is, change to simultaneously drive two sets of piston sealing test tools, two sets of rod sealing test tools, or one set of piston sealing test tool and one set of rod sealing test tool for comparative testing; by installing test seals of different structures on two test pistons arranged in the piston sealing test tool, and constructing completely the same test conditions through the piston rod with an internal channel, the comparative test data is accurate and effective, and the test efficiency is doubled; the high temperature test can be smoothly implemented by adopting an independent high temperature test oil tank and selecting high temperature resistant hydraulic components to construct a test circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram provided by an embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of a test bench assembly provided in an embodiment of the utility model.

[0022] Figure 3 It is a schematic diagram of a piston seal test tool provided in an embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the rod sealing test tool provided by the embodiment of the utility model

[0024] Figure 5 It is a schematic diagram of a hydraulic pump station provided by an embodiment of the utility model.

[0025] The numbers in the figure are:

[0026] 1. Test bench assembly; 2. Operating table; 3. Hydraulic pump station; 11. Driving components; 121. First tension pressure sensor; 122. Second tension pressure sensor; 13. First sealing test tool; 14. Second sealing test tool; 15. Mounting bench; 131. Connecting lug; 132. Piston rod; 133. Test end cover; 134. Cylinder; 1351. First test piston; 1352. Second test piston; 136. End cover; 137. First test seal; 138. Second test seal; 139. Lock nut; 3 1. Driving oil pump; 32. Load oil pump; 33. Driving safety valve; 34. Proportional relief valve; 35. Servo proportional valve; 36. Driving pipeline oil filter; 37. Test pipeline oil filter; 38. Return oil filter; 3121. First solenoid stop valve; 3122. Second solenoid stop valve; 313. Load pressure regulating valve; 314. Load safety valve; 3151. First heater; 3152. Second heater; 316. Oil cooler; 317. First temperature sensor; 318. Driving oil tank; 319. Test oil tank; 320. Second temperature sensor. DETAILED DESCRIPTION

[0027] The following is a specific implementation of the reciprocating sealing experimental device for high-temperature comparative testing of leakage rate and friction force of the utility model, in conjunction with the accompanying drawings. However, it should be pointed out that the specific implementation is not used to limit the specific implementation of the utility model. All similar structures and similar variations of the utility model should be included in the protection scope of the utility model. The description of the following embodiments is with reference to the attached drawings to illustrate specific embodiments in which the utility model can be implemented. The directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the utility model, rather than to limit the utility model.

[0028] See also Figures 1 to 5 The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature is characterized in that it comprises a test bench assembly 1, an operating table 2 and a hydraulic pump station 3; the operating table 2 is connected to the test bench assembly 1 and the hydraulic pump station 3, and the test bench assembly 1 is connected to the hydraulic pump station 3;

[0029] The test bench assembly 1 includes: a driving component 11, a first tensile pressure sensor 121 and a second tensile pressure sensor 122, a first sealing test fixture 13, a second sealing test fixture 14 and a mounting bench 15, wherein the driving component 11, the first tensile pressure sensor 121 and the second tensile pressure sensor 122, the first sealing test fixture 13 and the second sealing test fixture 14 are all arranged on the mounting bench 15; the first tensile pressure sensor 121 is arranged on the driving component 11, and the first tensile pressure sensor 121 is connected to the first sealing test fixture 13, the second tensile pressure sensor 122 is arranged on the driving component 11, and the second tensile pressure sensor 122 is connected to the second sealing test fixture 14; the first sealing test fixture 13 is a piston sealing test fixture, and the second sealing test fixture 14 is a rod sealing test fixture. The first tension and pressure sensor 121 is threadedly connected to the driving component 11, and the first tension and pressure sensor 121 is connected to the piston seal test fixture pin shaft, the second tension and pressure sensor 122 is threadedly connected to the driving component 11, and the second tension and pressure sensor 122 is connected to the rod seal test fixture pin shaft.

[0030] The hydraulic pump station 3 includes: a driving hydraulic circuit and a test hydraulic circuit; the driving hydraulic circuit includes a driving oil pump 31, a driving pipeline oil filter 36, a driving safety valve 33, a proportional relief valve 34, a servo proportional valve 35, a first temperature sensor 317, a second heater 3152 and a driving oil tank 318, wherein the first temperature sensor 317 and the second heater 3152 are arranged on the driving oil tank 318, the driving oil tank 318 is connected to the driving oil pump 31, the driving oil pump 31 is connected to the driving pipeline oil filter 36, the driving pipeline oil filter 36 is connected to the servo proportional valve 35, the servo proportional valve 35 is connected to the driving safety valve 33, and the driving safety valve 33 is connected to the proportional relief valve 34;

[0031] The operation mode of the driving cylinder of the driving component 11 is divided into three strokes. This process requires the high-precision pressure sensor of the servo proportional valve 35 and the magnetic telescopic displacement sensor in the driving unit actuator to run and process at the same time. The first is the acceleration stroke, which will provide power for the driving cylinder, and the driving unit accelerates from zero to the maximum value. The second is the uniform motion process. During this process, the driving unit drives the test unit to do uniform linear motion. The third is the deceleration stroke. This process reduces the speed of the driving cylinder from the maximum value to zero and then completes the reversing operation through the servo proportional valve 35. Repeat the above strokes, and then reciprocate to complete the reciprocating test process. The advantage of this motion stroke is that the servo proportional valve 35, the driving cylinder of the driving component 11 and the test PLC software act simultaneously, which can control the displacement error of the reciprocating motion within 0.5mm, and at the same time has acceleration and deceleration processes, which reduces the operating noise to a minimum. In another embodiment, the servo proportional valve 35 can also be replaced with an electro-hydraulic reversing valve.

[0032] The test hydraulic circuit includes a load oil pump 32, a test oil tank 319, an oil cooler 316, a first heater 3151, a second temperature sensor 320, a test pipeline oil filter 37, a return oil filter 38, a load safety valve 314, a first electromagnetic stop valve 3121, a second electromagnetic stop valve 3122 and a load pressure regulating valve 313. The first heater 3151 and the second temperature sensor 320 are arranged on the test oil tank 319, the oil cooler 316 is connected to the test oil tank 319, the test oil tank 319 is connected to the load oil pump 32, the load oil pump 32 is connected to the test pipeline oil filter 37, the test pipeline oil filter 37 is connected to the load safety valve 314, the test oil tank 319 is connected to the return oil filter 38, the return oil filter 38 is connected to the first electromagnetic stop valve 3121, and the second electromagnetic stop valve 3122 is connected to the first electromagnetic stop valve 3121. The first heater 3151 and the second temperature sensor 320 are connected to the operation console 2 , and the oil cooler 316 is connected to the operation console 2 .

[0033] There are two independent oil tanks in the hydraulic pump station 3: a drive oil tank 318 and a test oil tank 319, wherein the ordinary hydraulic oil in the drive oil tank 318 is only used for the drive system; the high-temperature hydraulic oil in the test oil tank 319 is only used for the piston seal test fixture and the rod seal test fixture test; the load oil pump 32 of the test hydraulic circuit, the test pipeline oil filter 37, the return oil filter 38, the first electromagnetic stop valve 3121, the second electromagnetic stop valve 3122 and the load safety valve 314 are all made of high-temperature resistant parts. Specifically, the load oil pump 32, the pipeline oil filter, the return oil filter 38, the first electromagnetic stop valve 3121, the second electromagnetic stop valve 3122 and the load safety valve 314 of the test hydraulic circuit can withstand a temperature of 120°C; during the test experiment, the first heater 3151 is used to The high-temperature hydraulic oil in the test oil tank 319 is heated, and the oil temperature is collected by the second temperature sensor 320 installed on the test oil tank 319, and the collected data is transmitted to the control computer of the operating console 2 for processing; when the oil temperature reaches the preset value, the control computer of the operating console 2 outputs a control signal to cut off the power to the first heater 3151 to stop heating; when the oil temperature continues to rise and reaches the preset upper limit value, the control computer of the operating console 2 outputs a control signal to start the oil cooler 316 to cool the oil in the test oil tank 319 until it reaches the preset value; after the preset value is reached, the control computer of the operating console 2 outputs a control signal to stop the oil cooler 316, and the control is circulated in this way to keep the test oil temperature at the preset value, and the preset value can be up to 120.

[0034] The first sealing test tool 13 is a piston sealing test tool, which includes a connecting ear 131, a piston rod 132, a test end cover 133, a cylinder 134, a first test piston 1351, a second test piston 1352, an end cover 136, a first test seal 137, a second test seal 138 and a locking nut 139; the connecting ear 131 is connected to the piston rod 132, the test end cover 133 is connected to the cylinder 134, the piston rod 132 passes through the test end cover 133 and extends into the cylinder 134, the piston rod 132 is connected to the first test piston 1351, the second test piston 1352 and the locking nut 139, the cylinder 134 is connected to the end cover 136, the first test seal 137 is connected to the first test piston 1351, and the second test seal 138 is connected to the second test piston 1352. The connecting ear 131 is threadedly connected to the piston rod 132, the test end cover 133 is threadedly connected to the cylinder 134, and the piston rod 132 is threadedly connected to the locking nut 139 after passing through the first test piston 1351 and the second test piston 1352 in the cylinder 134, and the locking nut 139 is used to compress the second test piston 1352. The piston rod 132 is provided with an internal channel. Small holes are provided on the first test piston 1351 and the second test piston 1352. A collection hole is provided on the cylinder 134. The piston sealing test tool is also equipped with a measuring cylinder or a measuring cup, and the measuring cylinder or the measuring cup is arranged near the collection hole.

[0035] The first test seal 137 is mounted on the first test piston 1351, and the second test seal 138 is mounted on the second test piston 1352. The high-pressure hydraulic oil is collected to the connection surface of the first test piston 1351 and the second test piston 1352 through the internal channel of the piston rod 132, and then enters the cavity formed by the first test piston 1351, the second test piston 1352 and the inner wall of the cylinder 134 through the small holes on the first test piston 1351 and the second test piston 1352, and acts on the side surfaces of the first test seal 137 and the second test seal 138 at the same time; the first test When the driving component 11 drives the piston rod 132 and the first test piston 1351 to move linearly, the leakage oil generated by the seal 137 will be driven to the side of the test end cover 133 by the first test seal 137, and fall into the measuring cylinder through the collecting hole on the side of the cylinder 134 for measurement; when the driving component 11 drives the piston rod 132 and the second test piston 1352 to move linearly, the leakage oil generated by the second test seal 138 will be driven to the side of the test end cover 133 by the second test seal 138, and fall into the measuring cylinder through the collecting hole on the side of the cylinder 134 for measurement.

[0036] The second sealing test fixture 14 is a rod sealing test fixture, including a connecting ear 131, a piston rod 132, a test end cover 133, a cylinder 134, an end cover 136, a first test seal 137, a second test seal 138 and a locking nut 139; the connecting ear 131 is connected to the piston rod 132, the test end cover 133 is connected to the cylinder 134, the piston rod 132 passes through the test end cover 133 and extends into the cylinder 134, the cylinder 134 is connected to the end cover 136, the first test seal 137 is connected to the test end cover 133, and the second test seal 138 is connected to the end cover 136. The test end cover 133, the end cover 136, the first test seal 137 and the second test seal 138 are detachable and can be replaced according to different needs with appropriate sizes. A collection hole is provided on the cylinder 134. The rod sealing test tool is also equipped with a measuring cylinder or a measuring cup, and the measuring cylinder or the measuring cup is arranged close to the collecting hole.

[0037] After the high-pressure hydraulic oil is collected to the connection surface of the first test seal 137, the second test seal 138 and the cylinder 134 through the internal channel of the piston rod 132, the leakage oil generated by the first test seal 137 will be driven to one side of the test end cover 133 by the first test seal 137 when the driving component 11 drives the piston rod 132, and will fall into the measuring cylinder through the collection hole on the side of the cylinder 134 for measurement. The leakage oil generated by the second test seal 138 will be driven to one side of the end cover 136 by the second test seal 138 when the driving component 11 drives the piston rod 132, and will fall into the measuring cylinder through the collection hole on the side of the cylinder 134 for measurement.

[0038] When the driving component 11 drives the piston rod 132, the first test piston 1351 and the second test piston 1352 to move linearly, the friction force generated by the first test seal 137, the second test seal 138 installed thereon and the inner hole of the cylinder 134 is collected by the first tension and pressure sensor 121 and the second tension and pressure sensor 122 and transmitted to the control computer of the operating table 2 for processing; the driving component 11 can simultaneously drive one set of piston sealing test tooling and one set of rod sealing test tooling for testing, and can also be changed to simultaneously drive two sets of piston sealing test tooling or two sets of rod sealing test tooling for comparative testing through the combination of sealing test tooling.

[0039] The operating table 2 includes an industrial computer and an operating panel. The industrial computer and the operating panel are connected. The operating panel is provided with an industrial computer display screen and operating buttons. The industrial computer includes the functions of storing, processing data and graphing data. The industrial computer is provided with test software. The operating buttons include operation prompts, alarm prompts, power switches, reset and emergency stop. A light is provided in the operation prompt. The emergency stop button is a push button. After the emergency stop button is pressed, it can be rotated to reset. After the key is inserted into the power switch, the power can be rotated to turn on or off. The operating table 2 is connected to an equipment electrical cabinet, which is used to provide power to the test bench assembly 1, the operating table 2 and the hydraulic pump station 3.

[0040] When starting up, first go to the electrical cabinet of the equipment and turn on the main power of the control cabinet; then return to the operation panel of the operating table 2 and close the power switch; turn on the switch of the hydraulic pump station 3 located on the front side of the operating table 2 to start the device; finally, press the power button of the industrial computer host located on the left side of the operating table 2 to start the test software on the desktop of the industrial computer display. At this point, the preparation work such as starting up the test equipment is completed.

[0041] The main interface of the test software consists of the "test interface" and the "test loop monitoring interface". The interface switching action is achieved through the corresponding switch button in the middle of the interface. The button displays the "white" state to indicate that the interface has been successfully switched. Among them, the test interface is mainly used for the selection of parameters such as test models, the display of test data results and the display of real-time curves.

[0042] The test interface includes buttons for selecting models and drop-down list option buttons, which can select and download model parameters and other information in the "Test Parameter Settings" interface to the test system. The test parameter settings include: test number information box, tester and sealed product model information. The test interface also includes buttons such as current test item, total number of tests, test time, remaining time, remaining number of times, cumulative test time, and cumulative number of runs.

[0043] The test circuit monitoring interface includes the motor start and stop button, the reversing valve reversing button, the start and stop indicator light button, as well as the pressure button, the oil temperature button, the displacement button, etc.; it also includes the main motor speed button, the main return oil pressure button, the offset pressure adjustment slide button, the slide value button, the adjustment button, the mode switch button and the oil temperature button, etc., which are used to view relevant information.

[0044] There are two operating modes for the reciprocating seal test device that can compare leakage rate and friction at high temperature, one is automatic mode and the other is manual mode. The two modes can be selected through the mode switch button on the test loop monitoring interface. In the automatic mode, the test equipment automatically completes the test of the reciprocating seal product according to the given test parameters. The manual mode is used by maintenance personnel or related technicians to manually debug and set parameters of the equipment.

[0045] In the actual operation process, first switch to manual mode, then start and stop each motor through the motor start and stop button, then adjust the main motor to the appropriate speed through the main motor speed button, then use the main return oil pressure button and the load pressure adjustment slider button to make the system reach the required pressure, and finally use the reversing valve reversing button to obtain the required action. The manual mode also includes the cylinder life test function. In the manual mode, click the cylinder extension button and the cylinder retraction button to manually operate the cylinder.

[0046] During the automatic test process, by watching the real-time test curve on the left side of the test interface, you can obtain the current test information in real time. You can select or block the display of a test curve through the "check box" in the upper left corner of the real-time test curve. The corresponding test result data and other information are displayed in the various display bars at the top of the test interface. When the test is completed or ended, you can selectively generate a test report, click the report save button until the system pops up a window indicating that the test report has been successfully saved, and you can open the current test report immediately through the pop-up prompt button, or click the cancel button to find the corresponding test report under the save path to operate it.

[0047] The test parameter settings mainly include test parameter settings and system parameter settings. The test parameters are mainly used to set the reciprocating seal product model information, test times, test conditions and other test-related parameters; the system parameter part is mainly used to set the system temperature alarm upper and lower limits and other system protection-related parameters.

[0048] Test parameter settings include: setting and changing certain model parameters; adding new test models and test parameters; deleting certain models and test parameters.

[0049] The system parameter settings include the main oil tank oil temperature control parameters and the test oil tank 319 oil temperature control parameter settings, specifically, including the system start heating lower limit, the system stop heating upper limit, the system oil temperature alarm lower limit, the system oil temperature alarm upper limit and the test cylinder A&B tension and compression sensor calibration.

[0050] System start heating lower limit: Use this input box to set the heating lower limit temperature. When the temperature sensor detects that the oil temperature is lower than or equal to the lower limit value of this temperature, the system will automatically start the heater of the corresponding oil tank to heat the oil temperature.

[0051] System stops heating upper limit: Use this input box to set the upper limit temperature of heating. When the heater detects that the oil temperature is higher than or equal to the set temperature during the process of heating the oil, the system will automatically turn off the heater of the corresponding oil tank.

[0052] System oil temperature alarm lower limit: When the corresponding oil tank detects that the oil temperature is lower than or equal to the set temperature, the system will issue an alarm signal of "corresponding oil tank oil temperature alarm lower limit".

[0053] System oil temperature alarm upper limit: When the corresponding oil tank detects that the oil temperature is higher than or equal to the set temperature, the system will issue an alarm signal of "corresponding oil tank oil temperature alarm upper limit".

[0054] Calibration of test cylinder A&B tension and compression sensors: When the real-time display values ​​of the test cylinder A&B tension and compression sensors are abnormal, you can recalibrate the sensor by clicking the calibration button on this interface when the equipment is in standby mode and the test cylinder A&B tension and compression sensors are almost unloaded.

[0055] After completing all the above parameter settings, you need to click the OK button to save the parameters and make them effective. Click the Exit button to exit this interface and return to the main interface.

[0056] The reciprocating seal experimental method for high temperature comparison test of leakage rate and friction force, S1 goes to the equipment electrical cabinet and turns on the main power supply of the control cabinet; S2 goes to the operation panel of the operating table 2 and closes the power switch; S3 turns on the switch of the hydraulic pump station 3 located in front of the operating table 2 to start the device; S4 presses the power button of the industrial computer host located on the side of the operating table 2 to start the test software on the desktop of the industrial computer display. So far, the preparation work such as starting the detection equipment is completed. S5 Switch to manual mode, then start and stop each motor through the motor start and stop button, and then adjust the main motor to the appropriate speed through the main motor speed button, and then use the main return oil pressure button and the adjustment slide bar button of the eccentric load pressure to make the system reach the required pressure, and finally obtain the required action through the reversing valve reversing button. S6 During the automatic test process, by watching the real-time test curve on the left side of the test interface, you can get the current test information in real time, select or block the display of a test curve through the "check box" in the upper left corner of the real-time test curve, and the corresponding test result data and other information are displayed in each display bar at the top of the test interface. Before performing S5, you can choose whether to replace the tooling, that is, the piston seal test tooling and the rod seal test tooling. You can choose to drive two sets of piston seal test tooling or two sets of rod seal test tooling at the same time for comparative testing, or you can choose one set of piston seal test tooling or one set of rod seal test tooling for comparative testing.

[0057] The driving component 11 of the utility model can drive two sets of sealing test tools for testing at the same time, and can be changed by changing the combination of the sealing test tools, that is, changing to simultaneously drive two sets of piston sealing test tools, two sets of rod sealing test tools, or one set of piston sealing test tool and one set of rod sealing test tool for comparative testing; by installing test seals of different structures on the two test pistons arranged in the piston sealing test tool, and constructing exactly the same test conditions through the piston rod 132 with an internal channel, the comparative test data is accurate and effective, and the test efficiency is doubled; the high temperature test can be smoothly implemented by adopting an independent high temperature test oil tank 319 and selecting high temperature resistant hydraulic components to construct a test circuit.

Claims

1. A reciprocating seal test device capable of comparing leakage rate and friction force at high temperature, characterized in that: It includes a test bench assembly, an operating table and a hydraulic pump station; the operating table is connected to the test bench assembly and the hydraulic pump station, and the test bench assembly is connected to the hydraulic pump station; The test bench assembly includes: a driving component, a first tensile pressure sensor and a second tensile pressure sensor, a first sealing test fixture, a second sealing test fixture and a mounting bench; the first tensile pressure sensor is arranged on the driving component, the first tensile pressure sensor is connected to the first sealing test fixture, the second tensile pressure sensor is arranged on the driving component, and the second tensile pressure sensor is connected to the second sealing test fixture; The hydraulic pump station includes: a driving hydraulic circuit and a test hydraulic circuit; The driving hydraulic circuit includes a driving oil pump, a driving pipeline oil filter, a driving safety valve, a proportional relief valve, a servo proportional valve, a first temperature sensor, a second heater and a driving oil tank, wherein the first temperature sensor and the second heater are arranged on the driving oil tank, the driving oil tank is connected to the driving oil pump, the driving oil pump is connected to the driving pipeline oil filter, the driving pipeline oil filter is connected to the servo proportional valve, the servo proportional valve is connected to the driving safety valve, and the driving safety valve is connected to the proportional relief valve; The test hydraulic circuit includes a load oil pump, a test oil tank, an oil cooler, a first heater, a second temperature sensor, a test pipeline oil filter, a return oil filter, a load safety valve, a first electromagnetic stop valve, a second electromagnetic stop valve and a load pressure regulating valve. The first heater and the second temperature sensor are arranged on the test oil tank, the oil cooler is connected to the test oil tank, the test oil tank is connected to the load oil pump, the load oil pump is connected to the test pipeline oil filter, the test pipeline oil filter is connected to the load safety valve, the test oil tank is connected to the return oil filter, the return oil filter is connected to the first electromagnetic stop valve, and the second electromagnetic stop valve is connected to the first electromagnetic stop valve.

2. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 1 is characterized in that: The first sealing test tool is a piston sealing test tool, and the second sealing test tool is a piston sealing test tool.

3. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 2, characterized in that: The piston seal test tool comprises a connecting lug, a piston rod, a test end cover, a cylinder barrel, a first test piston, a second test piston, an end cover, a first test seal, a second test seal and a locking nut; The connecting ear is connected to the piston rod, the test end cover is connected to the cylinder, the piston rod passes through the test end cover and extends into the cylinder, the piston rod is connected to the first test piston, the second test piston and the locking nut, the cylinder is connected to the end cover, the first test seal is connected to the first test piston, and the second test seal is connected to the second test piston.

4. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 3 is characterized in that: The first tension and pressure sensor is threadedly connected to the driving component.

5. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 3, characterized in that: The first tension pressure sensor is connected to the piston seal test fixture pin.

6. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 3, characterized in that: The second tension and pressure sensor is threadedly connected to the driving component.

7. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 3, characterized in that: The piston rod is threadedly connected to the locking nut after passing through the first test piston and the second test piston in the cylinder.

8. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 3, characterized in that: The piston rod is provided with an internal bore.

9. The reciprocating seal experimental device capable of comparing leakage rate and friction force at high temperature according to claim 1, characterized in that: The first sealing test tool is a piston sealing test tool, the second sealing test tool is a rod sealing test tool, the first tension and pressure sensor is connected to the piston sealing test tool, and the second tension and pressure sensor is connected to the rod sealing test tool.

Images