CN106226045B - A kind of dry testing method for pressure limiting valve opening pressure and device - Google Patents
A kind of dry testing method for pressure limiting valve opening pressure and device Download PDFInfo
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- CN106226045B CN106226045B CN201610543516.XA CN201610543516A CN106226045B CN 106226045 B CN106226045 B CN 106226045B CN 201610543516 A CN201610543516 A CN 201610543516A CN 106226045 B CN106226045 B CN 106226045B
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- G—PHYSICS
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- 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
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Abstract
The present invention discloses a kind of dry testing method for pressure limiting valve opening pressure and device；Including air source, pressure regulator valve, proportional pressure-reducing valve, booster, gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve, exhaust two-way electromagnetic valve, electric control gear；Air source, pressure regulator valve, proportional pressure-reducing valve, booster, gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve are sequentially connected in series piping connection；Exhaust two-way electromagnetic valve is connected on the pipeline between gas tank and gas flowmeter；Electric control gear is electricly connected with gas flowmeter, pressure sensor, inflation two-way electromagnetic valve, exhaust two-way electromagnetic valve；Booster is persistently pressurized, and pressure is constantly rising；Pressure limiting valve opening pressure detection is accurate and repeatable accuracy is very high；Or the upper limit stuck to pressure limiting valve pump, is very easy to detected；Test method is simple, and cost is extremely low, and the test period is very short, does not influence product cleannes index, good operational environment, transport facility.
Description
Technical field
The invention belongs to lubricating oil pump and gauge check technical field, are related to a kind of dry testing method for pressure limiting valve opening pressure
And device；More particularly to a kind of engine oil pump pressure-limiting valve Opening pressure dry testing method and device, especially suitable for various forms
The engine oil pump pressure-limiting valve detection of steel ball class, plunger-type.
Background technology
Traditional engine oil pump pressure-limiting valve Opening pressure test method uses oil as test(ing) medium, rating test oil temperature,
Under viscosity, speed conditions, rating test pressure, the lubricating oil pump when closing regulating valve needed for regulating valve control lubricating oil pump product are utilized
Oil outlet pressure increases, and when more than pressure limiting valve opening pressure, pressure limiting valve is opened, and obtains pressure limiting valve by pressure transmitter at this time
Opening pressure.Traditional tests by the pressure limiting valve opening pressure of medium of oil, and experimentation cost is high, and beat is slow, product after experiment
It carries out draining process, experiment, which drains, still oily residual in rear product, have product certain pollution, product cleannes index is not
Easily reach, makes troubles storage, transport and user assembled use.
Known CN1908609A dry testing method for pressure limiting valve opening pressure is a kind of pressure limiting different from the present invention
Valve opening pressure dry testing method and device；Its device includes pre- loading line, pressure piping, pre- loading line and pressure inlet
Road is connected in parallel；Detection method is to first have to inflate the pressure limiting valve of detection in advance, and air pressure need to stablize 2-10 after inflation in advance
Second；So that pressure limiting valve is reached sealing, reaches stable gas pressure；It is pressurized again into pressure limiting valve cavity by pressure piping, pressure piping
The gas of supercharging is quantitative；Pressurization gas acts on pressure limiting valve plunger or steel ball, when gas pressure is more than pressure valve spring
When pretightning force, pressure limiting valve plunger or steel ball are opened, while the peak of pressure sensor detection air pressure at this time；It is primary to be pressurized tolerance
It totally disappeared and consume；The method can not be detected pressure limiting valve activity displacement；And but pressure limiting valve stuck to pressure limiting valve has the special feelings such as leakage
Condition cannot make detection and differentiate.
Invention content
The invention discloses a kind of dry testing method for pressure limiting valve opening pressure and devices, to solve in the prior art with oil
It is tested for the pressure limiting valve opening pressure of medium, experimentation cost is high, and beat is slow, and product will carry out draining process, experiment drip after experiment
Still have oily residual after oil in product, there is certain pollution, product cleannes index to be not easy to reach to product, to storage, transport and
User assembled use is made troubles；Pressure limiting valve opening pressure dry testing can not be detected pressure limiting valve activity displacement；And to pressure limiting
Valve is stuck but pressure limiting valve has the special circumstances such as leakage that cannot make the problems such as detection differentiates.
Dry testing method for pressure limiting valve opening pressure of the present invention：Using air or other gaseous atmospheres as medium, limit is utilized
The gas pressure phase separation equilibrium principle that the active force and lubricating oil pump high pressure chest of pressure valve spring are filled with；It is moved to by pressure limiting valve body
The variation of tolerance is inflated when open position to judge pressure limiting valve opening pressure, this tolerance is by gas flowmeter in loading line
Come what is detected；Before experiment, inflation two-way electromagnetic valve and master body piping connection, calibrating test device；When experiment, two-way is inflated
Solenoid valve and test block pressure limiting valve piping connection.
Including：
The first step detects pressure limiting valve opening pressure：
Before experiment, exhaust two-way electromagnetic valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve will be by the gas of pressure regulator valve
Test(ing) medium pressure stability is adjusted to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limit
Value；Test piece pressure limiting valve is tightly connected with inflation two-way electromagnetic valve pipeline；When starting experiment, inflation two-way electromagnetic valve is opened,
Air source is persistently pumped into gas test medium；It is accurate by a constant-speed ratio by proportional pressure-reducing valve by the gas test medium of pressure regulator valve
Pressure regulation；The gas test medium exported from proportional pressure-reducing valve is persistently pressurized through booster to gas tank；Gas test medium is through storage
Gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve are inflated to test piece pressure limiting valve；Gas flowmeter detects
Gas test rate-of flow；When gas flowmeter detection gas test(ing) medium flow reaches the flow value of setting, pressure sensor
The gas test pressure medium value of detection is pressure limiting valve opening pressure value.
Second step, exhaust are initial with recovery：
It inflates two-way electromagnetic valve to close, exhaust two-way electromagnetic valve is opened, and gas test medium passes through exhaust in experimental rig
Two-way electromagnetic valve is vented；When the gas test pressure medium value of pressure sensor detection is less than initial pressure value, it is vented two-way
Solenoid valve is closed；Proportional pressure-reducing valve, which adjusts gas test pressure medium, to restore to initial pressure value, in case experiment next time；Ensure
Test repeatability precision.
Dry testing method for pressure limiting valve opening pressure of the present invention：Proportional pressure-reducing valve adjust gas test pressure medium value with
The difference of pressure limiting valve opening pressure lower limiting value is more than or equal to 0.05MPa.
Dry testing method for pressure limiting valve opening pressure of the present invention：Further include pressure sensing before the detection of test piece pressure limiting valve
Device tests the calibration of pressure limiting valve opening pressure limit value；Including：
Before calibration, exhaust two-way electromagnetic valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve will be by the gas of pressure regulator valve
Test(ing) medium pressure stability is adjusted to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limit
Value；Pressure limiting valve opening pressure master body and inflation two-way electromagnetic valve pipeline are tightly connected；It is opened with the pressure limiting valve of caliberating device
Open pressure limit；When calibration, inflation two-way electromagnetic valve is opened, and air source is persistently pumped into gas test medium；By the gas of pressure regulator valve
Body test(ing) medium presses a constant-speed ratio precise pressure regulation by proportional pressure-reducing valve；By the gas test medium of proportional pressure-reducing valve output through increasing
Depressor is persistently pressurized to gas tank；Gas test medium is through gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetism
Valve is inflated to master body；Master body pressure limiting valve is opened, and gas flowmeter when simultaneously established standards exemplar pressure limiting valve is opened is recorded
Detection stream magnitude, and the pressure limiting valve opening pressure limit value of nominal pressure sensor detection；After calibration, inflation two-way electromagnetic valve closes
It closes, exhaust two-way electromagnetic valve is opened, and gas test medium is by being vented two-way electromagnetic valve exhaust in experimental rig；Work as pressure sensing
When the gas test pressure medium value of device detection is less than pressure limiting valve opening pressure lower limiting value, exhaust two-way electromagnetic valve is closed；Ratio
Pressure reducing valve, which adjusts gas test pressure medium, to restore to initial pressure value, and calibration terminates, and master body is removed from test station.
Master body includes pressure limiting valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar；Point
Pressure limiting valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar test station pressure limiting is not installed on
On the position of valve, with the pressure limiting valve opening pressure upper and lower bound of caliberating device respectively.
Pressure limiting valve opening pressure dry testing device of the present invention includes air source, pressure regulator valve, proportional pressure-reducing valve, booster, storage
Gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve, exhaust two-way electromagnetic valve, electric control gear；Air source, pressure regulation
Valve, proportional pressure-reducing valve, booster, gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve are sequentially connected in series pipeline
Connection；Proportional pressure-relief valve control supercharging speed, it is ensured that detection it is accurate and repeated；Booster, gas tank ensure in experiment
Moment provides enough increased aeration quantitys；Exhaust two-way electromagnetic valve is connected to the pipeline between gas tank and gas flowmeter
On；Electric control gear is electricly connected with gas flowmeter, pressure sensor, inflation two-way electromagnetic valve, exhaust two-way electromagnetic valve；Initially
State, exhaust two-way electromagnetic valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve will be by the gas test medium pressure of pressure regulator valve
Power stable regulation is to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limiting value 0.05MPa；
When starting experiment, inflation two-way electromagnetic valve is opened, and is inflated to pressure limiting valve；When gas flowmeter detection gas flow reaches setting
Flow value when, the gas test pressure medium value in electric control gear control pressure sensor signal piping；Meanwhile inflating two-way
Solenoid valve is closed, and exhaust two-way electromagnetic valve is opened；When the gas test pressure medium value of pressure sensor detection is less than initial pressure
It is vented two-way electromagnetic valve when force value to close, bleed pressure is adjusted to initial pressure value by proportional pressure-reducing valve；This wheel off-test.
Booster input and the output pressure ratio of pressure limiting valve opening pressure dry testing device of the present invention are more than or equal to 1：4.
Pressure limiting valve opening pressure dry testing device of the present invention further includes muffler；Muffler and exhaust two-way electromagnetic valve pipe
Road connects, and reduces noise when being vented two-way electromagnetic valve and opening exhaust.
Pressure limiting valve opening pressure dry testing device of the present invention further includes master body；Master body two, including pressure limiting
Valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar, master body are demarcated by oily formula testing stand.
The positive effect of the present invention is：Pressure limiting valve opening pressure detection is accurate and repeatable accuracy is very high；To pressure limiting valve
Stuck or upper limit pump, is very easy to detected；Test method is simple, and cost is extremely low, and the test period is very short, does not influence to produce
Product cleannes index, good operational environment, transport facility.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
In figure：1 air source, 2 pressure regulator valves, 3 proportional pressure-reducing valves, 4 boosters, 5 gas tanks, 6 gas flowmeters, 7 pressure sensings
Device, 8 inflation two-way electromagnetic valves, 9 master bodies, 10 exhaust two-way electromagnetic valves, 11 mufflers, 12 test piece pressure limiting valves.
Specific implementation mode
Below in conjunction with the attached drawing embodiment that the present invention will be described in detail.
First embodiment of the invention is as shown in Figure 1, pressure limiting valve opening pressure dry testing device includes air source 1, pressure regulator valve
2, the booster 4, gas tank 5, gas flowmeter 6, pressure sensor 7 of 3, four times of pressure ratios of proportional pressure-reducing valve, inflation two are powered
Magnet valve 8, master body 9, exhaust two-way electromagnetic valve 10, muffler 11, electric control gear；Master body 9 two, including pressure limiting valve are opened
Upper pressure limit master body 9 and pressure limiting valve opening pressure lower limit standard exemplar 9 are opened, master body 9 is accurately marked by oily formula testing stand
It is fixed；Air source 1, pressure regulator valve 2, proportional pressure-reducing valve 3, booster 4, gas tank 5, gas flowmeter 6, pressure sensor 7, inflation two-way
Solenoid valve 8 is sequentially connected in series piping connection；Proportional pressure-reducing valve 3 control supercharging speed, it is ensured that detection it is accurate and repeated；Four times
Booster 4, the gas tank 5 of pressure ratio ensure that moment provides enough increased aeration quantitys in experiment；It is vented two-way electromagnetic valve 10
It is connected on the pipeline between gas tank 5 and gas flowmeter 6；Muffler 11 and exhaust 10 piping connection of two-way electromagnetic valve；Electricity
Control device is electricly connected with gas flowmeter 6, pressure sensor 7, inflation two-way electromagnetic valve 8, exhaust two-way electromagnetic valve 10；Initially
State, exhaust two-way electromagnetic valve 10, inflation two-way electromagnetic valve 8 are closed, and proportional pressure-reducing valve 3 will be by the air pressure of pressure regulator valve 2
Stable regulation is to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limiting value 0.05MPa；When
When starting experiment, inflation two-way electromagnetic valve 8 is opened, and air source 1 is persistently pumped into air；Air by pressure regulator valve 2 is subtracted by ratio
Pressure valve 3 presses a constant-speed ratio precise pressure regulation；Booster 4 of the air exported from proportional pressure-reducing valve 3 through four times of pressure ratios is to gas tank 5
Lasting supercharging；Air is through gas tank 5, gas flowmeter 6, pressure sensor 7, inflation two-way electromagnetic valve 8 to test piece pressure limiting
Valve 12 is inflated；When 6 detection gas flow of gas flowmeter reaches the flow value of setting, electric control gear control pressure sensor 7
Air pressure value in signal piping；Meanwhile inflating two-way electromagnetic valve 8 and closing, exhaust two-way electromagnetic valve 10 is opened；When pressure passes
Exhaust two-way electromagnetic valve 10 is closed when the air pressure value that sensor 7 detects is less than initial pressure value, and proportional pressure-reducing valve 3 is by air source pressure
Power is adjusted to initial pressure value, this wheel off-test.
Test method is using air as medium, the gas that is filled with using the active force and lubricating oil pump high pressure chest of pressure valve spring
Pressure phase separation equilibrium principle；The variation of tolerance is inflated when being moved to open position by pressure limiting valve body to judge that pressure limiting valve is opened
Pressure, this tolerance are detected by gas flowmeter in loading line 6；Before experiment, two-way electromagnetic valve 8 and standard sample are inflated
9 piping connection of part, calibrating test device；When experiment, inflation two-way electromagnetic valve 8 and 12 piping connection of test block pressure limiting valve.
Detailed process is as follows：
The first step, device normalization：
Master body 9 includes pressure limiting valve opening pressure upper limit master body 9 and pressure limiting valve opening pressure lower limit standard exemplar
9；Pressure limiting valve opening pressure upper limit master body 9 and pressure limiting valve opening pressure lower limit standard exemplar 9 are installed on test work respectively
On the position of bit test workpiece pressure limiting valve 12, with the pressure limiting valve opening pressure upper and lower bound of caliberating device respectively；
Before experiment, exhaust two-way electromagnetic valve 10, inflation two-way electromagnetic valve 8 are closed；Proportional pressure-reducing valve 3 will pass through pressure regulator valve 2
Air-pressure stable be adjusted to initial pressure value, it is ensured that supply stablize air source, value be less than pressure limiting valve opening pressure lower limiting value
0.05MPa；Pressure limiting valve opening pressure master body 9 is installed on the position of test station test piece pressure limiting valve 12；Start
When device normalization, inflation two-way electromagnetic valve 8 is opened, and air source 1 is persistently pumped into air；Air by pressure regulator valve 2 is subtracted by ratio
Pressure valve 3 presses a constant-speed ratio precise pressure regulation；Booster 4 of the air exported from proportional pressure-reducing valve 3 through four times of pressure ratios is to gas tank 5
Lasting supercharging；Air is filled through gas tank 5, gas flowmeter 6, pressure sensor 7, inflation two-way electromagnetic valve 8 to master body 9
Gas；9 pressure limiting valve of master body is opened, and is recorded 6 detection stream magnitude of gas flowmeter when simultaneously 9 pressure limiting valve of established standards exemplar is opened and is
Gas flowmeter flow setting value, the pressure limiting valve opening pressure upper and lower bound detected with this nominal pressure sensor 7；The present invention
After the pressure limiting valve opening pressure upper and lower bound calibration of experimental rig, inflation two-way electromagnetic valve 8 is closed, and two-way electromagnetic valve 10 is vented
It opens, air is by being vented two-way electromagnetic valve 10,11 noise-reducing exhaust of muffler in experimental rig；It is detected when pressure sensor 7
When air pressure value is less than initial pressure value, exhaust two-way electromagnetic valve 10 is closed；Bleed pressure is adjusted to just by proportional pressure-reducing valve 3
Beginning pressure value, calibration finish, and master body 9 is removed from test station.
Second step detects pressure limiting valve opening pressure：
Before experiment, exhaust two-way electromagnetic valve 10, inflation two-way electromagnetic valve 8 are closed；Proportional pressure-reducing valve 3 will pass through pressure regulator valve 2
Air-pressure stable be adjusted to initial pressure value, it is ensured that supply stablize air source, value be less than pressure limiting valve opening pressure lower limiting value
0.05MPa；When starting experiment, inflation two-way electromagnetic valve 8 is opened, and air source 1 is persistently pumped into air；It is logical by the air of pressure regulator valve 2
Proportional pressure-reducing valve 3 is crossed by a constant-speed ratio precise pressure regulation, booster 4 of the air through four times of pressure ratios exported by proportional pressure-reducing valve 3
It is persistently pressurized to gas tank 5；Air is through gas tank 5, gas flowmeter 6, pressure sensor 7, inflation two-way electromagnetic valve 8 to experiment
Workpiece pressure limiting valve 12 is inflated；Gas flowmeter 6 detects air mass flow；Reach setting when gas flowmeter 6 detects air mass flow
When flow value, the air pressure value that pressure sensor 7 detects is pressure limiting valve opening pressure value.
Third walks, and exhaust is initial with recovery：
It inflates two-way electromagnetic valve 8 to close, exhaust two-way electromagnetic valve 10 is opened, and air is powered by exhaust two in experimental rig
Magnet valve 10,11 noise-reducing exhaust of muffler；When the air pressure value that pressure sensor 7 detects is less than initial pressure value, exhaust two
Three-way electromagnetic valve 10 is closed；Air pressure is accurately adjusted to recovery initial pressure value by proportional pressure-reducing valve 3, in case experiment next time；Really
Protect test repeatability precision.
Second embodiment of the invention is as shown in Figure 1, pressure limiting valve opening pressure dry testing device automatic-sealed and experiment work
The lubricating oil pump high pressure chest that part pressure limiting valve 12 communicates, using booster to high-pressure chamber plenum, pressure-air acts on pressure limiting
On valve plunger or steel ball, when high-pressure air pressure is more than test piece 12 initial tension of spring of pressure limiting valve, test piece pressure limiting valve
12 plunger or steel ball is gradually opened；Pressure-air loses heart from test piece pressure limiting valve 12, at this time 6 detection gas of gas flowmeter
When flow reaches the flow indicator of setting, air pressure value is pressure limiting valve opening pressure to the acquisition of pressure sensor 7 at this time.This side
Method is easy to detect accurately, repeatable accuracy is also very high.
Claims (8)
1. a kind of dry testing method for pressure limiting valve opening pressure, it is characterised in that：Including：
The first step detects pressure limiting valve opening pressure：
Before experiment, exhaust two-way electromagnetic valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve will be by the gas test of pressure regulator valve
Pressure medium stable regulation is to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limiting value；Examination
Workpiece pressure limiting valve is tested to be tightly connected with inflation two-way electromagnetic valve pipeline；When starting experiment, inflation two-way electromagnetic valve is opened, and air source is held
It is continuous to be pumped into gas test medium；One constant-speed ratio precise pressure regulation is pressed by proportional pressure-reducing valve by the gas test medium of pressure regulator valve；
The gas test medium exported from proportional pressure-reducing valve is persistently pressurized through booster to gas tank；Gas test medium through gas tank,
Gas flowmeter, pressure sensor and inflation two-way electromagnetic valve are inflated to test piece pressure limiting valve；Gas flowmeter detection gas
Test(ing) medium flow；When gas flowmeter detection gas test(ing) medium flow reaches the flow value of setting, pressure sensor detection
Gas test pressure medium value be pressure limiting valve opening pressure value；
Second step, exhaust are initial with recovery：
It inflates two-way electromagnetic valve to close, exhaust two-way electromagnetic valve is opened, and gas test medium is by being vented two-way in experimental rig
Solenoid valve vents；When the gas test pressure medium value of pressure sensor detection is less than initial pressure value, it is vented two-way electromagnetism
Valve is closed；Proportional pressure-reducing valve, which adjusts gas test pressure medium, to restore to initial pressure value, in case experiment next time；Ensure to test
Repeatability precision.
2. a kind of dry testing method for pressure limiting valve opening pressure according to claim 1, it is characterised in that：On-test
Before, the difference of gas test pressure medium value and pressure limiting valve opening pressure lower limiting value that proportional pressure-reducing valve is adjusted is more than or equal to
0.05MPa。
3. a kind of dry testing method for pressure limiting valve opening pressure according to claim 1, it is characterised in that：In test piece
It further include the pressure limiting valve opening pressure limit value calibration of pressure sensor test before pressure limiting valve detection；Including：
Before calibration, exhaust two-way electromagnetic valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve will be by the gas test of pressure regulator valve
Pressure medium stable regulation is to initial pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limiting value；It will
Pressure limiting valve opening pressure master body is tightly connected with inflation two-way electromagnetic valve pipeline；With the pressure limiting valve opening pressure of caliberating device
Limit value；
When calibration, inflation two-way electromagnetic valve is opened, and air source is persistently pumped into gas test medium；It is situated between by the gas test of pressure regulator valve
Matter presses a constant-speed ratio precise pressure regulation by proportional pressure-reducing valve；The gas test medium exported from proportional pressure-reducing valve is through booster to storage
Gas tank is persistently pressurized；Gas test medium is through gas tank, gas flowmeter, pressure sensor and inflates two-way electromagnetic valve to standard
Exemplar is inflated；Master body pressure limiting valve is opened, and gas flowmeter detection flows when simultaneously established standards exemplar pressure limiting valve is opened are recorded
Value, and the pressure limiting valve opening pressure limit value of nominal pressure sensor detection；
After calibration, inflation two-way electromagnetic valve is closed, and exhaust two-way electromagnetic valve is opened, and gas test medium passes through row in experimental rig
Gas two-way electromagnetic valve is vented；When the gas test pressure medium value of pressure sensor detection is less than pressure limiting valve opening pressure lower limiting value
When, exhaust two-way electromagnetic valve is closed；Proportional pressure-reducing valve, which adjusts gas test pressure medium, to restore to initial pressure value, calibration knot
Beam.
4. a kind of dry testing method for pressure limiting valve opening pressure according to claim 3, it is characterised in that：Pressure limiting valve is opened
Pressure criteria exemplar two, including pressure limiting valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar；
Pressure limiting valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar are close with inflation two-way electromagnetic valve respectively
Envelope connection；The pressure limiting valve opening pressure upper and lower bound of nominal pressure sensor detection respectively.
5. a kind of pressure limiting valve opening pressure dry testing device, it is characterised in that：Including air source, pressure regulator valve, proportional pressure-reducing valve, increasing
Depressor, gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve, exhaust two-way electromagnetic valve, electric control gear；Gas
Source, pressure regulator valve, proportional pressure-reducing valve, booster, gas tank, gas flowmeter, pressure sensor, inflation two-way electromagnetic valve are gone here and there successively
Join piping connection；Exhaust two-way electromagnetic valve is connected on the pipeline between gas tank and gas flowmeter；Electric control gear and gas
Flowmeter, pressure sensor, inflation two-way electromagnetic valve and exhaust two-way electromagnetic valve electricly connect；Original state, exhaust two are powered
Magnet valve, inflation two-way electromagnetic valve are closed；Proportional pressure-reducing valve by by the gas test pressure medium stable regulation of pressure regulator valve to first
Beginning pressure value, it is ensured that air source is stablized in supply, and value is less than pressure limiting valve opening pressure lower limiting value 0.05MPa；When starting experiment, fill
Gas two-way electromagnetic valve is opened, and is inflated to pressure limiting valve；It is automatically controlled when gas flowmeter detection gas flow reaches the flow value of setting
Gas test pressure medium value in device control pressure sensor signal piping；Meanwhile inflating two-way electromagnetic valve and closing, exhaust
Two-way electromagnetic valve is opened；When the gas test pressure medium value of pressure sensor detection is less than initial pressure value, exhaust two is powered
Magnet valve is closed, and bleed pressure is adjusted to initial pressure value by proportional pressure-reducing valve.
6. a kind of pressure limiting valve opening pressure dry testing device according to claim 5；It is characterized in that：Booster inputs
It is more than or equal to 1 with output pressure ratio：4.
7. a kind of pressure limiting valve opening pressure dry testing device according to claim 5；It is characterized in that：It further include noise reduction
Device；Muffler and exhaust two-way electromagnetic valve piping connection.
8. a kind of pressure limiting valve opening pressure dry testing device according to claim 5；It is characterized in that：It further include standard
Exemplar；Master body two, including pressure limiting valve opening pressure upper limit master body and pressure limiting valve opening pressure lower limit standard exemplar,
Master body is demarcated by oily formula testing stand.
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| CN201610543516.XA CN106226045B (en) | 2016-07-12 | 2016-07-12 | A kind of dry testing method for pressure limiting valve opening pressure and device |
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| CN201610543516.XA CN106226045B (en) | 2016-07-12 | 2016-07-12 | A kind of dry testing method for pressure limiting valve opening pressure and device |
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| CN106226045B true CN106226045B (en) | 2018-10-26 |
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| CN107727329B (en) * | 2017-09-08 | 2024-01-26 | 南京沪江复合材料股份有限公司 | Method and instrument for testing one-way exhaust valve for packaging bag |
| CN109976398A (en) * | 2017-12-28 | 2019-07-05 | 核动力运行研究所 | A kind of underwater radiological survey X air bag automatic inflatable/air control system and method |
| CN111594429B (en) * | 2020-05-06 | 2022-04-19 | 杭州沃镭智能科技股份有限公司 | Air medium detection method and detection device of vane type variable displacement oil pump |
| CN112483882B (en) * | 2020-12-16 | 2024-06-25 | 福州大学 | Life buoy inflation detection device and method |
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| CN205785801U (en) * | 2016-07-12 | 2016-12-07 | 富奥汽车零部件股份有限公司 | A kind of pressure limiting valve opening pressure dry testing device |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205785801U (en) * | 2016-07-12 | 2016-12-07 | 富奥汽车零部件股份有限公司 | A kind of pressure limiting valve opening pressure dry testing device |
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