CN114136608A - Pressure test system - Google Patents
Pressure test system Download PDFInfo
- Publication number
- CN114136608A CN114136608A CN202111553898.1A CN202111553898A CN114136608A CN 114136608 A CN114136608 A CN 114136608A CN 202111553898 A CN202111553898 A CN 202111553898A CN 114136608 A CN114136608 A CN 114136608A
- Authority
- CN
- China
- Prior art keywords
- pressure
- air
- control module
- workpiece
- pressing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 92
- 238000003825 pressing Methods 0.000 claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 31
- 238000005086 pumping Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 125
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 18
- 230000000903 blocking effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
本发明涉及产品检测技术领域，具体公开了压力试验系统，包括测试台、压紧机构、气压调节模块、压力传感器和控制模块，压紧机构包括压板和连接在压板上的压盘和压杆，压盘底部设有上密封垫，测试台上设有下密封垫，上密封垫和下密封垫能够将工件泵油腔的上下端面封闭；压力传感器用于采集泵油腔的压力数据，控制模块控制气压调节模块向泵油腔提供压力不断增大的气体，控制模块接基于压力数据建立随时间变化的压力曲线，控制模块判断出压力曲线上的拐点并识别拐点处对应的压力。本方案解决了现有技术中在调压阀开启压力测试过程中因高压气体的高压影响工件泵油腔内泵油结构性能的问题，并达到了对调压阀开启压力进行自动化检测的目的。
The invention relates to the technical field of product detection, and specifically discloses a pressure test system, which includes a test table, a pressing mechanism, an air pressure regulating module, a pressure sensor and a control module. The pressing mechanism comprises a pressing plate and a pressing plate and a pressing rod connected to the pressing plate. There is an upper gasket at the bottom of the pressure plate, and a lower gasket on the test bench. The upper and lower gaskets can seal the upper and lower end faces of the oil cavity of the workpiece pump; the pressure sensor is used to collect the pressure data of the oil cavity of the pump, and the control module The air pressure adjustment module is controlled to provide gas with increasing pressure to the pump oil chamber. The control module establishes a pressure curve that changes with time based on the pressure data. The control module determines the inflection point on the pressure curve and identifies the corresponding pressure at the inflection point. The solution solves the problem in the prior art that the high pressure of the high-pressure gas affects the structural performance of the pump oil in the oil chamber of the workpiece pump during the opening pressure test of the pressure regulating valve, and achieves the purpose of automatically detecting the opening pressure of the pressure regulating valve.
Description
Technical Field
The invention relates to the technical field of product detection, in particular to a pressure test system.
Background
The diesel (or gasoline) engine is generally provided with an oil pump, the oil pump comprises a pump body and an oil pumping structure arranged in an oil pumping cavity of the pump body, the oil pump sucks the oil into the oil pumping cavity of the oil pump, and the sucked oil is discharged into an oil filter and various lubricating oil channels of the engine under the action of pressure, so that the functions of lubricating, antifriction, cooling, anticorrosion, shock absorption and the like of various transmission pairs of the engine are realized.
The oil pump of the large-flow diesel (or gasoline) engine is required to be provided with a pressure regulating valve (also called a safety valve or a pressure limiting valve) of a safety protection component, a pump oil cavity of a pump body is communicated with a pressure relief channel, the pressure relief channel is provided with the pressure regulating valve, and the pressure regulating valve is used for maintaining normal oil pressure sent into an engine lubricating oil channel so as to avoid oil leakage or lack of lubrication at each part in the engine caused by overhigh or overlow oil pressure of an engine system and further cause abnormal conditions of cooling, cleaning, sealing, corrosion prevention, shock absorption and the like of the engine.
The traditional pressure detection of the pressure regulating valve is simulated by injecting kerosene, diesel oil or mixed oil into an oil pump to test the opening pressure of the pressure regulating valve, but the traditional mode wastes test oil, takes long time for testing, and causes the problems of high cost and low efficiency of the test; in addition, the tested oil pump needs to be subjected to oil leaching treatment, so that the cost of the pressure regulating valve opening pressure test is further increased, and therefore, a mode of performing gas measurement on the opening pressure of the pressure regulating valve is provided in the prior art.
In the existing gas testing mode, high-pressure gas is used as a testing medium, the gas replaces traditional testing oil, when a specific pressure test is carried out, an oil pump is placed on a testing platform, a pressing mechanism at the top of a workpiece is used for pressing the oil pump (the oil pump is also a workpiece), and finally, the high-pressure gas is filled into a pump oil cavity of the oil pump until a pressure regulating valve communicated with the pump oil cavity is automatically opened, the pressure when the pressure regulating valve is automatically opened is the opening pressure of the pressure regulating valve, although the test enables the detection of the opening pressure of the pressure regulating valve to be simple, the purposes of improving the detection efficiency and reducing the detection cost are achieved.
However, in the gas measurement process, the pressure born by the oil pumping cavity is continuously increased, the oil pumping structure is installed in the oil pumping cavity, and the performance of the oil pumping structure can be influenced to a certain extent when the oil pumping structure is subjected to a high-pressure test.
In addition, because the pump oil cavity continuously receives high-pressure gas, the pump oil cavity is communicated with the oil inlet channel, the oil outlet channel and the pressure relief channel for installing the pressure regulating valve, the existing pressing mechanism only realizes pressing at the upper end of the pump oil cavity and the angle position of a workpiece, but under a high-pressure test, the oil pump is easy to displace due to high pressure, on one hand, the accuracy of the pressure regulating valve opening pressure test is easy to be influenced, and on the other hand, the oil pump is easy to displace under high pressure to bring potential safety hazards.
Disclosure of Invention
The invention aims to provide a pressure test system to solve the problem that the structural performance of oil pumping in an oil pumping cavity of a workpiece is influenced by high pressure of high-pressure gas in the opening pressure test process of a pressure regulating valve in the prior art.
In order to achieve the above object, the basic scheme of the invention is as follows:
the pressure test system comprises a test board and a pressing mechanism, wherein the pressing mechanism comprises a pressing plate, a pressing plate and a plurality of pressing rods, the pressing plate and the pressing rods are connected to the pressing plate, the pressing rods can abut against different positions of a workpiece, an upper sealing gasket is arranged at the bottom of the pressing plate, a lower sealing gasket is arranged on the test board, and the upper sealing gasket and the lower sealing gasket can seal the upper end face and the lower end face of an oil cavity of the workpiece pump; the device also comprises an air pressure adjusting module, a pressure sensor and a control module, wherein the air pressure adjusting module is used for providing air with pressure for the pump oil cavity, the pressure sensor is connected between the air pressure adjusting module and the pump oil cavity, and the pressure sensor is used for acquiring pressure data of the pump oil cavity; the pressure regulating module and the pressure sensor are connected with the control module, the control module controls the pressure regulating module to provide gas with continuously increased pressure for the oil pumping cavity, the control module receives and stores pressure data from the pressure sensor, the control module establishes a pressure curve changing along with time based on the pressure data, the control module judges an inflection point on the pressure curve according to the pressure curve data, and the pressure corresponding to the inflection point is judged as the opening pressure of the pressure regulating valve.
Compare the beneficial effect in prior art:
when the scheme is adopted, the workpiece is pressed on the test board by the pressing rod of the pressing mechanism, the pressing plate with the upper sealing gasket on the pressing mechanism is sealed from one end face of the pump oil cavity of the workpiece while the workpiece is pressed on the test board, and the lower sealing gasket on the test board seals the other end face of the pump oil cavity, so that gas with pressure and continuously increased pressure can be provided for the pump oil cavity through the air pressure adjusting module after other channels of the pump oil cavity are sealed on the basis that the pump oil cavity of the workpiece is not provided with a pump oil structure (such as a structure that an inner rotor and an outer rotor are meshed to realize oil pumping), and when the pressure in the pump oil cavity exceeds the bearing capacity of the pressure adjusting valve, the pressure adjusting valve is automatically opened. The test system of the scheme has the advantages that the opening pressure test of the pressure regulating valve is realized before the assembly of the pump oil cavity of the workpiece is completed, the detection difficulty is reduced, the preposition of the opening pressure detection of the pressure regulating valve is realized, the timely detection and processing of the workpiece quality are facilitated, in addition, the opening pressure test of the pressure regulating valve can be realized under the condition that the pump oil cavity of the workpiece is not provided with the pump oil structure, and the condition that the performance of the pump oil structure is influenced due to high-pressure test is completely avoided.
In addition, the test system collects the pressure data of the pump oil cavity in real time through the pressure sensor, the collected pressure data are stored in real time through the control module, the control module can establish a pressure curve which changes along with time based on the pressure data, process recording and process monitoring of the pressure test process are achieved, the control module controls the air pressure adjusting module to continuously increase the test air pressure which is output to the pump oil cavity, the control module automatically judges an inflection point according to the change of the pressure curve and automatically judges whether the opening pressure of the pressure regulating valve is qualified or not according to the air pressure value of the inflection point, and the automation degree is greatly improved.
Furthermore, the plurality of pressure bars can be pressed on two sides of a channel communicated with a pump oil cavity of the workpiece.
Has the advantages that: when the scheme is adopted, the workpiece is placed on the test board, the workpiece is compressed through the compression mechanism above the test board, the top of the workpiece pump oil cavity is compressed through the pressure plate when the workpiece pump oil cavity is specifically compressed, the channels communicated with the workpiece pump oil cavity are compressed on two sides of the workpiece pump oil cavity through the plurality of compression rods, so that the pump oil cavity is compressed, other channels bearing high-pressure gas simultaneously with the pump oil cavity are also compressed one by one, the whole workpiece is guaranteed to be comprehensively compressed, the problem that the opening pressure of the pressure regulating valve is inaccurate to test and the potential safety hazard caused by workpiece displacement is avoided due to the condition that the pump oil cavity is not tightly sealed or the workpiece is displaced.
Further, the control module includes a display capable of displaying a pressure curve.
Has the advantages that: through the setting of display and pressure curve for the whole pressure test process of pressure test system to pressure regulating valve is more directly perceived.
Further, the control module judges an inflection point on the pressure curve according to the pressure curve data, the pressure corresponding to the inflection point is judged as the opening pressure of the pressure regulating valve, the control module compares the pressure corresponding to the inflection point with a preset qualified pressure range, and the control module gives an alarm when the pressure corresponding to the inflection point exceeds the preset qualified pressure range.
Has the advantages that: when the pressure in the pump oil cavity rises continuously, the pressure acquired by the pressure sensor rises continuously, when the pressure in the pump oil cavity rises to force the pressure regulating valve to open, and the pressure in the pump oil cavity drops suddenly, the pressure data acquired by the pressure sensor also drops suddenly, a time pressure change curve which rises firstly and then drops suddenly is displayed on the pressure curve, and the inflection point of the sudden drop of the pressure is the opening pressure of the pressure regulating valve, so that the judgment of the opening pressure of the pressure regulating valve by the control module is facilitated, and the whole pressure change process can be visually seen by a worker; and when the opening pressure of the pressure regulating valve obtained by testing is not in the preset qualified pressure range, the control module gives an alarm to remind that the opening pressure of the pressure regulating valve is unqualified.
Further, the air pressure adjusting module comprises an air storage device and a supercharger, the air storage device is used for storing compressed air, the input end of the supercharger is communicated with the air storage device, the output end of the supercharger is communicated with the oil pumping cavity, a proportional valve is connected to the supercharger, the supercharger and the proportional valve are both connected with the control module, and the proportional valve is connected to the output end of the supercharger.
Has the advantages that: high-pressure gas is provided for the supercharger through the gas storage device, the high-pressure gas is supercharged through the supercharger to meet the pressure requirement of gas measurement, then the high-pressure gas which is conveyed to the pump oil cavity through the proportional valve is controlled to be supercharged in the same gradient, the supercharging process of the whole pump oil cavity is carried out in a progressive mode, and the problem that the accuracy of pressure data acquired by the pressure sensor is influenced due to sudden pressure increase of the pump oil cavity is solved.
Furthermore, an air inlet channel is arranged on the test board, an air passing channel is arranged on the lower sealing gasket and communicated with the air inlet channel, the air passing channel can be communicated with the oil cavity of the pump, and one end, far away from the air passing channel, of the air inlet channel is communicated with the air pressure adjusting module.
Has the advantages that: the air inlet channel is arranged, so that the test board is conveniently communicated with the air pressure adjusting module, and high-pressure air generated by the air pressure adjusting module enters the oil pumping cavity through the air inlet channel and the air passing channel, so that the opening pressure test of the pressure adjusting valve is conveniently carried out on a workpiece.
Further, fixedly connected with sleeve on the clamp plate, the vertical sliding connection of depression bar is on the sleeve, and the depression bar top can offset with the clamp plate.
Has the advantages that: in actual use, when the lower sealing gasket is not subjected to external force from the pressing mechanism, the lower sealing gasket jacks up a workpiece, so that the workpiece is inclined when being just placed on the test bench, if a rapid pressing mode is directly adopted, the workpiece is easily pressed in an inclined state, namely when the position is not well adjusted, and the problem that the oil cavity of the pump is not sealed tightly and the detection accuracy is affected is caused. And this scheme passes through telescopic setting for a plurality of depression bars all realize preliminary location and do not realize compressing tightly when touching the work piece, only drive the sleeve and remove when the clamp plate constantly moves down, just can really support tight work piece until depression bar top and clamp plate lower surface counterbalance, this process makes the depression bar bottom with the elder generation contact work piece, find the position that compresses tightly again, compress tightly the work piece at last, the realization compresses tightly the comprehensive accuracy of work piece, guarantee the sealed compactness of pump oil pocket, be favorable to improving the accuracy of air-vent valve pressure test.
Furthermore, the test board is provided with a limiting column, and the limiting column can be inserted into the mounting hole of the workpiece.
Has the advantages that: through the setting of spacing post, further increase the accuracy of work piece location.
Furthermore, a positioning piece is further arranged on the test board, the positioning piece is attached to the surface of the workpiece, and the positioning piece is located on one side of the limiting column.
Has the advantages that: the positioning piece is matched with the limiting column for use, so that the workpiece is placed more accurately, and the situation that the workpiece moves due to overlarge pressure born in the pressure test process is avoided; simultaneously, the setting element sets up in one side of spacing post, makes the work piece when placing the testboard, directly supports tightly on the setting element with the work piece earlier, then just can place the work piece downwards fast, and the work piece is placed the in-process downwards and is emboliaed the spacing post with the mounting hole of work piece in automatically promptly, accomplishes the quick location of work piece, and this scheme makes placing of work piece on the testboard become simply quick and accurate.
Further, hold-down mechanism is including being used for driving the driver that the clamp plate goes up and down, and the driver includes the primary drive and is located the auxiliary drive of primary drive both sides, and the primary drive all with clamp plate fixed connection with auxiliary drive's output, primary drive's output fixed connection is in the clamp plate middle part.
Has the advantages that: through the setting of main drive and vice drive for the middle part and two lateral parts of clamp plate all have the drive, and then make the clamp plate atress more even.
Drawings
FIG. 1 is a schematic three-dimensional structure of an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a partial right side cross-sectional view of FIG. 1;
FIG. 4 is a schematic three-dimensional structure of a testing table according to an embodiment of the present invention;
FIG. 5 is a schematic three-dimensional structure of a workpiece after being placed on a testing table according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the three-dimensional structure of the workpiece of FIG. 5 after being pressed by the pressing head and the pressing disk;
fig. 7 is a connection relationship diagram of the air pressure adjusting module and the air inlet channel of the testing table according to the embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a rack 1, a test bench 2, a lower sealing gasket 21, an air inlet channel 22, an air passing channel 23, a limiting column 24, a positioning piece 25, a driver 3, a main drive 31, an auxiliary drive 32, a pressure plate 4, a sleeve 41, an upper plate 42, a middle plate 43, a lower plate 44, a pressure plate 5, an upper sealing gasket 51, a connecting rod 52, a pressing plate 53, a pressure rod 6, a pressure head 61, a pusher 7, a moving block 71, a workpiece 10, a pump oil cavity 101, an oil inlet channel 102, an oil outlet channel 103 and a pressure relief channel 104.
Examples
The embodiment is basically as shown in fig. 1 to 7, the pressure test system includes a frame 1, a test table 2, a pressing mechanism, an air pressure adjusting module, a pressure sensor and a control module, the pressing mechanism includes a driver 3, a pressing plate 4, a pressing plate 5 and a plurality of pressing rods 6 connected to the pressing plate 4, the driver 3 is fixedly mounted on the frame 1, the pressing mechanism is located above the test table 2, the driver 3 is used for driving the pressing plate 4 to ascend and descend, the pressing plate 5 can be pressed on a pump oil cavity 101 of a workpiece 10, the pressing rods 6 can be pressed on two sides of a channel communicated with the pump oil cavity 101, and the pump oil cavity 101 is communicated with an oil inlet channel 102, an oil outlet channel 103 and a pressure relief channel 104.
The driver 3 comprises a main driver 31 and auxiliary drivers 32 positioned at two sides of the main driver 31, the main driver 31 and the auxiliary drivers 32 are both fixedly connected on the frame 1, the output ends of the main driver 31 and the auxiliary drivers 32 are both fixedly connected with the pressure plate 4, and the output end of the main driver 31 is fixedly connected in the middle of the pressure plate 4; in the present embodiment, both the main drive 31 and the sub drive 32 employ air cylinders.
Referring to fig. 3 and 4, the lower seal 21 is fixedly connected to the test table 2 by screws, the upper seal 51 is fixed to the lower surface of the pressure plate 5 by screws, and the upper seal 51 and the lower seal 21 are located at the upper and lower sides of the pump oil chamber 101.
An air inlet channel 22 is formed in the test bench 2, an air passing channel 23 is formed in the lower sealing gasket 21, one end of the air passing channel 23 is communicated with the air inlet channel 22, and the other end of the air passing channel 23 can be communicated with the pump oil cavity 101; the upper surface of the test bench 2 is fixedly connected with a limiting column 24 and a positioning piece 25 through screws, the limiting column 24 can be inserted into the mounting hole of the workpiece 10, the positioning piece 25 is attached to the surface of the workpiece 10, and the positioning piece 25 is positioned on one side of the limiting column 24; one end of the air inlet channel 22 far away from the air passing channel 23 is communicated with the air pressure adjusting module.
A plurality of sleeves 41 are fixedly connected to the pressing plate 4 through screws, each pressing rod 6 corresponds to one sleeve 41, the pressing rods 6 are vertically connected to the sleeves 41 in a sliding mode, and the tops of the pressing rods 6 can abut against the pressing plate 4. The bottom end of the pressure lever 6 is connected with a pressure head 61 through threads; the pressure plate 5 comprises a connecting rod 52 and a pressing plate 53, the connecting rod 52 is vertically connected in the corresponding sleeve 41 in a sliding mode, the top of the connecting rod 52 can abut against the pressure plate 4, the pressing plate 53 is connected to the connecting rod 52 in a threaded mode, the pressing plate 53 can be pressed on the pump oil cavity 101 in a pressing mode, and the upper sealing gasket 51 is fixed to the bottom of the pressing plate 53; in this embodiment, the pressing plate 4 includes an upper plate 42, a middle plate 43 and a lower plate 44 sequentially arranged from top to bottom, the middle plate 43 is sandwiched between the upper plate 42 and the lower plate 44, the upper plate 42 is fixedly connected with the output end of the driver 3, the sleeve 41 is fixedly connected with the lower plate 44, the pressing rod 6 and the connecting rod 52 move upward and then can be tightly abutted against the middle plate 43, and the middle plate 43 is present, so that on one hand, the installation of the pressing plate 4 and the output end of the driver 3 and the installation of the sleeve 41, the connecting rod 52 and the pressing rod 6 are facilitated, and on the other hand, when the middle plate 43 in the pressing plate 4 is damaged, only the middle plate 43 needs to be replaced, and the replacement cost is reduced; in addition, the upper plate 42 and the lower plate 44 are arranged to facilitate the disassembly, assembly and maintenance of parts respectively connected with the upper plate and the lower plate.
The test bench 2 is further provided with a side blocking mechanism, the side blocking mechanism comprises a pusher 7 and a moving block 71 fixed at the output end of the pusher 7, a sealing ring is mounted on the moving block 71 and can abut against the side surface of the workpiece 10, and the sealing ring on the moving block 71 can block a channel which is formed in the side surface of the workpiece 10 and communicated with the pump oil cavity 101.
In this embodiment, the outlet of the oil discharge channel 103 of the workpiece 10 faces the test platform 2, and the test platform 2 is provided with a sealing ring for sealing the outlet of the oil discharge channel 103 of the workpiece 10.
Referring to fig. 7, the air pressure adjusting module and the pressure sensor are both connected to the control module, the air pressure adjusting module is used for providing pressurized air for the pump oil cavity 101, the air pressure adjusting module includes an air storage device and a supercharger, the air storage device is used for storing compressed air, the air storage device includes an air compressor and an air storage tank, and the air compressor injects high-pressure air into the air storage tank. The input end of the supercharger is communicated with the output end of the gas storage device, the output end of the supercharger is communicated with the pump oil cavity 101, the output end of the supercharger is connected with a proportional valve, the output end of the proportional valve is communicated with the gas inlet channel 22 through a pipeline, a pressure sensor is installed on the pipeline through which the proportional valve is communicated with the gas inlet channel 22, the pressure sensor is used for collecting pressure data of the pump oil cavity 101, the supercharger and the proportional valve are both connected with the control module, and the supercharger and the proportional valve are used for pressurizing the pressure of the supercharger sent to the pump oil cavity 101 through the proportional valve in the same gradient.
The control module controls the air pressure adjusting module to provide gas with continuously increased pressure for the pump oil cavity 101, the control module receives and stores pressure data from the pressure sensor, the control module establishes a pressure curve changing along with time based on the pressure data, the control module judges an inflection point on the pressure curve according to the pressure curve data, the pressure corresponding to the inflection point is judged as opening pressure of the pressure regulating valve, and the control module gives an alarm when the pressure corresponding to the inflection point exceeds a preset qualified pressure range. The control module includes a display capable of displaying a pressure profile.
The specific implementation process is as follows:
when the pressure opening test is performed on the pressure regulating valve of the workpiece 10 by using the embodiment, the workpiece 10 with the pressure regulating valve is firstly transported to the test bench 2, when the workpiece 10 is placed on the test bench 2, the workpiece 10 is firstly directly abutted against the positioning piece 25, then the workpiece 10 can be quickly placed downwards, and in the process of placing the workpiece 10 downwards, the mounting hole of the workpiece 10 is automatically sleeved into the limiting column 24, so that the quick and accurate positioning of the workpiece 10 is completed.
And then starting the pressing mechanism, so that the main drive 31 and the auxiliary drive 32 of the driver 3 drive the pressing plate 4 to move downwards, further driving the pressing rod 6 and the connecting rod 52 which slide in the sleeve 41 to move downwards, the pressing plate 4 moves downwards until the pressing head 61 at the end part of the pressing rod 6 contacts with the workpiece 10, meanwhile, the pressing disc 53 at the end part of the connecting rod 52 and the upper sealing gasket 51 contact with the workpiece 10, and the driver 3 continues to drive the pressing plate 4 to move downwards until the pressing rod 6 and the connecting rod 52 move along the sleeve 41 and abut against the pressing plate 4, and the pressing of the workpiece 10 is completed. While the workpiece 10 is completely pressed, the upper end surface and the lower end surface of the pump oil chamber 101 are respectively sealed by the upper sealing gasket 51 and the lower sealing gasket 21; and the outlet of the oil discharge channel 103 of the workpiece 10, which is communicated with the pump oil cavity 101, faces the test bench 2, and a sealing ring for sealing the outlet of the oil discharge channel 103 is arranged on the test bench 2, so that the outlet of the oil discharge channel 103 of the workpiece 10 is sealed.
The pusher 7 of the side blocking mechanism is started, so that the pusher 7 drives the moving block 71 to abut against the side edge of the workpiece 10, and the moving block 71 is provided with a sealing ring for blocking the oil inlet channel 102 on the side edge of the workpiece 10, so that the opening of the oil inlet channel 102 of the workpiece 10 is also blocked.
And finally, controlling the air pressure adjusting module to input high-pressure air into the air inlet channel 22 of the test bench 2 through the control module, and continuously increasing the pressure of the high-pressure air in an equal gradient mode through the supercharger and the proportional valve, so that the high-pressure air finally enters the sealed pump oil cavity 101 through the air inlet channel 22 and the air passing channel 23, and when the pressure in the pump oil cavity 101 exceeds the bearing capacity of the pressure regulating valve, the pressure regulating valve is automatically opened.
When the pressure regulating valve is adopted, the top of the pump oil cavity 101 is pressed and sealed through the pressure plate 5, and the channels communicated with the pump oil cavity 101 are pressed on two sides of the pressure plate 6, so that the pump oil cavity 101 is pressed, other channels bearing high-pressure gas with the pump oil cavity 101 are also pressed one by one, the whole workpiece 10 is guaranteed to be pressed comprehensively, and the problems of inaccurate opening pressure test of the pressure regulating valve and potential safety hazards caused by displacement of the workpiece 10 due to the condition that the pressure regulating valve is not pressed in place or the workpiece 10 is displaced are avoided.
In the process of compressing tightly work piece 10, this embodiment passes through the setting of sleeve 41, make a plurality of depression bars 6 all only realize preliminary location and do not realize compressing tightly when touching work piece 10, only drive sleeve 41 and remove when the continuous downstream of clamp plate 4, just can really support tight work piece 10 until the depression bar 6 top offsets with the 4 lower surfaces of clamp plate, this process makes the depression bar 6 bottom (also be pressure head 61) with contacting work piece 10 earlier, find the position that compresses tightly again, compress tightly work piece 10 at last, the realization compresses tightly the comprehensive accuracy of work piece 10, guarantee the sealed exactness of pump oil pocket 101, be favorable to improving the accuracy of air-vent valve pressure test.
This embodiment allows the workpiece 10 to achieve upper and lower sealing of the pump oil chamber 101 by the upper seal gasket 51 and the lower seal gasket 21 without installing an oil pumping structure (such as a structure in which the inner rotor and the outer rotor are engaged to pump oil), the oil inlet channel 102 of the workpiece 10 is sealed by the side blocking mechanism, the outlet of the oil outlet channel 103 of the workpiece 10 is sealed by the sealing ring on the test bench 2, the pump oil chamber 101 is supplied with gas with pressure and increasing pressure by the gas pressure adjusting module, furthermore, the opening pressure test of the pressure regulating valve can be conveniently realized before the oil pump is assembled, the preposition of the opening pressure test of the pressure regulating valve is realized, the timely detection and processing of the quality of the workpiece 10 are facilitated, in addition, the opening pressure test of the pressure regulating valve can be realized under the condition that the oil pumping cavity 101 of the workpiece 10 is not provided with an oil pumping structure, and the condition that the performance of the oil pumping structure is influenced due to the high pressure test is completely avoided.
In addition, in the process of continuously rising the pressure in the pump oil cavity 101, because the pressure sensor is arranged on a connecting pipeline between the proportional valve and the air inlet channel 22, the pressure sensor is equivalent to real-time acquisition of pressure data of the pump oil cavity 101, the control module is used for storing the acquired pressure data in real time, the control module can establish a pressure curve changing along with time based on the pressure data, process recording and process monitoring of the pressure test process are realized, the control module is used for controlling the air pressure adjusting module to continuously increase the test air pressure transmitted to the pump oil cavity 101 in an isocratic mode, the control module is used for automatically judging an inflection point according to the change of the pressure curve and automatically judging whether the opening pressure of the pressure regulating valve is qualified or not according to the air pressure value of the inflection point, an alarm is automatically sent out when the inflection point is judged to be unqualified, and the automation degree is greatly improved.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. Pressure test system, including testboard and hold-down mechanism, its characterized in that: the pressing mechanism comprises a pressing plate, a pressing plate and a plurality of pressing rods, the pressing plate and the pressing rods are connected to the pressing plate, the pressing rods can abut against different positions of a workpiece, an upper sealing gasket is arranged at the bottom of the pressing plate, a lower sealing gasket is arranged on the testing table, and the upper sealing gasket and the lower sealing gasket can seal the upper end face and the lower end face of an oil cavity of the workpiece pump; the device also comprises an air pressure adjusting module, a pressure sensor and a control module, wherein the air pressure adjusting module is used for providing air with pressure for the pump oil cavity, the pressure sensor is connected between the air pressure adjusting module and the pump oil cavity, and the pressure sensor is used for acquiring pressure data of the pump oil cavity; the pressure regulating module and the pressure sensor are connected with the control module, the control module controls the pressure regulating module to provide gas with continuously increased pressure for the oil pumping cavity, the control module receives and stores pressure data from the pressure sensor, the control module establishes a pressure curve changing along with time based on the pressure data, the control module judges an inflection point on the pressure curve according to the pressure curve data, and the pressure corresponding to the inflection point is judged as the opening pressure of the pressure regulating valve.
2. The pressure testing system of claim 1, wherein: the plurality of compression bars can be tightly pressed on two sides of a channel communicated with a pump oil cavity of a workpiece.
3. The pressure testing system of claim 1, wherein: the control module includes a display capable of displaying a pressure curve.
4. The pressure testing system of claim 3, wherein: the control module compares the pressure corresponding to the inflection point with a preset qualified pressure range, and the control module gives an alarm when the pressure corresponding to the inflection point exceeds the preset qualified pressure range.
5. The pressure testing system of claim 2, wherein: the air pressure adjusting module comprises an air storage device and a supercharger, the air storage device is used for storing compressed air, the input end of the supercharger is communicated with the air storage device, the output end of the supercharger is communicated with the oil pumping cavity, a proportional valve is connected to the supercharger, the supercharger and the proportional valve are both connected with the control module, and the proportional valve is connected to the output end of the supercharger.
6. The pressure testing system of claim 1, wherein: the test board is provided with an air inlet channel, the lower sealing gasket is provided with an air passing channel, the air passing channel is communicated with the air inlet channel, the air passing channel can be communicated with the pump oil cavity, and one end, far away from the air passing channel, of the air inlet channel is communicated with the air pressure adjusting module.
7. The pressure testing system of claim 6, wherein: the pressing plate is fixedly connected with a sleeve, the pressing rod is vertically connected to the sleeve in a sliding mode, and the top of the pressing rod can abut against the pressing plate.
8. The pressure testing system of claim 1, wherein: the test board is provided with a limiting column, and the limiting column can be inserted into the mounting hole of the workpiece.
9. The pressure testing system of claim 8, wherein: the test board is also provided with a positioning piece, the positioning piece is attached to the surface of the workpiece, and the positioning piece is positioned on one side of the limiting column.
10. The pressure testing system of claim 1, wherein: the pressing mechanism comprises a driver for driving the pressing plate to lift, the driver comprises a main drive and auxiliary drives located on two sides of the main drive, output ends of the main drive and the auxiliary drives are fixedly connected with the pressing plate, and output ends of the main drive and the auxiliary drives are fixedly connected to the middle of the pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111553898.1A CN114136608B (en) | 2021-12-17 | 2021-12-17 | Pressure test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111553898.1A CN114136608B (en) | 2021-12-17 | 2021-12-17 | Pressure test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114136608A true CN114136608A (en) | 2022-03-04 |
| CN114136608B CN114136608B (en) | 2025-01-10 |
Family
ID=80382980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111553898.1A Active CN114136608B (en) | 2021-12-17 | 2021-12-17 | Pressure test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114136608B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908609A (en) * | 2006-08-23 | 2007-02-07 | 中国第一汽车集团公司 | Dry testing method for pressure limiting valve opening pressure |
| CN202033162U (en) * | 2011-04-15 | 2011-11-09 | 宁波中桥精密机械有限公司 | Air tightness testing machine |
| CN102518581A (en) * | 2011-11-29 | 2012-06-27 | 宁波圣龙汽车动力系统股份有限公司 | Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve |
| CN102720667A (en) * | 2012-06-28 | 2012-10-10 | 湖南机油泵股份有限公司 | Method and device for testing opening pressure of pressure-limiting valve of oil pump |
| CN203275078U (en) * | 2013-05-29 | 2013-11-06 | 湖北精川智能装备股份有限公司 | An oil pump safety valve unlatching characteristic detecting apparatus |
| CN104697769A (en) * | 2014-12-29 | 2015-06-10 | 宁波圣龙汽车动力系统股份有限公司 | Opening pressure gas measuring device and method for oil pump pressure limiting valve |
| CN109538464A (en) * | 2019-01-15 | 2019-03-29 | 苏州天准科技股份有限公司 | A kind of pump class assembly multifunctional performance test device and corresponding test method |
| CN109883724A (en) * | 2018-12-28 | 2019-06-14 | 杭州沃镭智能科技股份有限公司 | A kind of EBS binary channels bridge module device for detecting performance and detection method |
| CN110146236A (en) * | 2019-06-27 | 2019-08-20 | 南京涵铭置智能科技有限公司 | A kind of automobile oil filter air tightness test automation equipment and its test method |
| CN111766060A (en) * | 2020-06-24 | 2020-10-13 | 武汉理工大学 | Test device and test method for automatic pressure regulating valve of electronically controlled pneumatic brake system |
| CN213180580U (en) * | 2020-11-12 | 2021-05-11 | 广州阿普顿自动化系统有限公司 | Motor sealing performance testing device |
| CN113250949A (en) * | 2021-05-31 | 2021-08-13 | 浙江日井泵业股份有限公司 | Leak detection device and leak detection equipment of pump body |
| CN216524779U (en) * | 2021-12-17 | 2022-05-13 | 重庆百吉四兴压铸有限公司 | Pressure test device |
-
2021
- 2021-12-17 CN CN202111553898.1A patent/CN114136608B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908609A (en) * | 2006-08-23 | 2007-02-07 | 中国第一汽车集团公司 | Dry testing method for pressure limiting valve opening pressure |
| CN202033162U (en) * | 2011-04-15 | 2011-11-09 | 宁波中桥精密机械有限公司 | Air tightness testing machine |
| CN102518581A (en) * | 2011-11-29 | 2012-06-27 | 宁波圣龙汽车动力系统股份有限公司 | Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve |
| CN102720667A (en) * | 2012-06-28 | 2012-10-10 | 湖南机油泵股份有限公司 | Method and device for testing opening pressure of pressure-limiting valve of oil pump |
| CN203275078U (en) * | 2013-05-29 | 2013-11-06 | 湖北精川智能装备股份有限公司 | An oil pump safety valve unlatching characteristic detecting apparatus |
| CN104697769A (en) * | 2014-12-29 | 2015-06-10 | 宁波圣龙汽车动力系统股份有限公司 | Opening pressure gas measuring device and method for oil pump pressure limiting valve |
| CN109883724A (en) * | 2018-12-28 | 2019-06-14 | 杭州沃镭智能科技股份有限公司 | A kind of EBS binary channels bridge module device for detecting performance and detection method |
| CN109538464A (en) * | 2019-01-15 | 2019-03-29 | 苏州天准科技股份有限公司 | A kind of pump class assembly multifunctional performance test device and corresponding test method |
| CN110146236A (en) * | 2019-06-27 | 2019-08-20 | 南京涵铭置智能科技有限公司 | A kind of automobile oil filter air tightness test automation equipment and its test method |
| CN111766060A (en) * | 2020-06-24 | 2020-10-13 | 武汉理工大学 | Test device and test method for automatic pressure regulating valve of electronically controlled pneumatic brake system |
| CN213180580U (en) * | 2020-11-12 | 2021-05-11 | 广州阿普顿自动化系统有限公司 | Motor sealing performance testing device |
| CN113250949A (en) * | 2021-05-31 | 2021-08-13 | 浙江日井泵业股份有限公司 | Leak detection device and leak detection equipment of pump body |
| CN216524779U (en) * | 2021-12-17 | 2022-05-13 | 重庆百吉四兴压铸有限公司 | Pressure test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114136608B (en) | 2025-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202255848U (en) | High-pressure safety valve detection system | |
| CN107309639B (en) | Fuel pump core assembly device and method for assembling pump core assembly by using same | |
| CN102323158A (en) | High pressure safety valve detection system | |
| CN103575598A (en) | Valve detection device and detection method thereof | |
| CN203519286U (en) | Valve static hydraulic pressure testing machine fastening device | |
| CN216524779U (en) | Pressure test device | |
| CN113125080A (en) | Pressure pipeline detection device | |
| CN114136608A (en) | Pressure test system | |
| CN212134362U (en) | A pressure resistance measuring device of a compressor shell | |
| CN202770625U (en) | Portable and intelligent detection apparatus for safety valve | |
| CN114215737B (en) | Oil pump quality detection system | |
| CN208223744U (en) | A kind of engine front cover assembly leakage detection apparatus | |
| CN220289329U (en) | Hydraulic engineering infiltration detection device | |
| CN104596711A (en) | Fastening device for static hydraulic pressure tester of valve | |
| CN107941437A (en) | Valve hydrostatic tester clamp device | |
| CN203572721U (en) | Valve detection device | |
| CN202372321U (en) | On-line detection equipment of oil cylinder assembly | |
| CN111413038B (en) | Sealing detection mechanism for liquefied petroleum gas cylinder valve | |
| CN108916020B (en) | Automatic detection equipment for pressure maintaining of hydraulic pump | |
| CN115707877A (en) | Automatic detection and pressurization adjusting system for energy storage device of welding machine hydraulic system | |
| CN114486550A (en) | Free bulging test method and system for downhole variable-temperature patching pipe | |
| CN206056886U (en) | High pressure high-performance pressure testing system | |
| CN221945734U (en) | A pressure detection device for a finished pressure relief pipe | |
| CN216746757U (en) | Automatic detection equipment for oil outlet valve joint with high safety | |
| CN203500328U (en) | Clutch master cylinder detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |