CN109900442A - A kind of air-distributor vacuum actuator leakage test device and test method - Google Patents
A kind of air-distributor vacuum actuator leakage test device and test method Download PDFInfo
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- 238000004891 communication Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
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Abstract
The present invention relates to a kind of air-distributor vacuum actuator leakage test device and test methods, the measurement of vacuum actor (1) leakage rate in the case where testing pressure for inlet manifold, including T-type three-way connection (2), pressure sensor (3), shut-off valve (4), pressure-regulating valve (5), vacuum pump (6) and time recorder (7)；T-type three-way connection (2) is by being responsible for and being arranged in supervisor side and the branch pipe vertical with supervisor is constituted, one end of supervisor with the vacuum input terminal of vacuum actor (1) for connecting, shut-off valve (4), pressure-regulating valve (5) and vacuum pump (6) are connected to the other end of supervisor in turn, and pressure sensor (3) is connected on branch pipe；Time recorder (7) is used for the setting and timing of test period.Compared with prior art, the present invention has many advantages, such as that precision is high, at low cost, measurement is convenient, is suitble to online and on-the-spot test.
Description
Technical field
The invention belongs to inlet manifold technical fields, more particularly, to a kind of air-distributor vacuum actuator leakage test
Device and test method.
Background technique
Variable intake manifold PDA (Port De-Activation Valve) is the length or section by changing air inlet pipe
Product improves efficiency of combustion, makes that engine is more stable in the slow-speed of revolution, torque is more sufficient, and when high revolving speed is more smooth, power is stronger
Greatly.And variable cross section inlet manifold uses valve block assembly and vacuum actor using more at present, opened by valve block or
It closes and air inlet sectional area is changed with this.
Air-distributor vacuum actuator is for driving valve block to open and close a kind of power source, vacuum actor
Internal diaphragm (there is sealing function) is picked up by vacuum, to pull drive rod, drive rod is connect with valve block assembly, thus
Turn on or off valve block.To change the sectional area of admission line, when the engine operates with a low speed, valve block, which is in, closes shape
State, (be equivalent to hose pinched flat, water velocity raising at this time), can allow gasoline mixed aerosol effect more preferable at this time, burn
More sufficiently, torque performs better.
When high engine speeds operating, the solenoid valve for controlling vacuum actor is opened, due to vacuum inside vacuum actor,
It drives valve block to open, at this point, inlet manifold sectional area increases, is conducive to bulk gas and enters cylinder, thus engine output work
Rate performs better.
Once actuator, due to membrane surface crackle, leakage, vacuum caused by stomata or other reasons can not be established,
So valve block cannot be opened, and when engine needs large quantity of air, inlet manifold will be unable to provide in time, to affect
The power of engine.
Therefore, for same actuator carry out leakage test it is particularly important in Product Validation stage, at present there are many
Test method setting, wherein there are commonly following methods:
(1) tested sample is placed in leak-testing platform, sets one group of pressure parameter, tests the leakage rate of entire sample.
(2) be to be placed in product in water or other liquid mediums, pressure be provided, see test sample in liquid medium whether
Generate bubble.
(3) by ultrasonic leak detector, once leakage rate occurs around diaphragm, it will clearly using ultrasonic leak detector
It debates and finds out, this is a kind of more quick leak detection method.
However the above method (1) must carry out in the lab, it, can not be existing due to being limited to test equipment volume size
Field directly measures on the engine, simultaneously because the cost issues of air flow meter, pressure sensor, software control, it should
The partially expensive defect of the generally existing testing expense of method.Since (good leak-testing platform can reach for pressure, flow sensor measurement error
The precision of ± 1~± 2ml/min) presence, for leakage rate require be less than 5ml/min actuator, the testboard deviation is still
It is so higher.Method (2) is generally only used for positive pressure leakage, can be convenient and intuitively observes by the naked eye leak sizes situation, however should
Method can not be larger in vacuum actor and bubble the collection difficulty of negative pressure suitable for work, can not accurately define leakage
Measure size.Method (3) provides the method for determining leakage point well, but has no idea accurately to test leakage rate.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of air-distributor vacuums
Actuator leakage test device and test method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of air-distributor vacuum actuator leakage test device, the vacuum actor for inlet manifold are pressed in test
The measurement of leakage rate under power, which is characterized in that including T-type three-way connection, pressure sensor, shut-off valve, pressure-regulating valve, vacuum
Pump and time recorder；
The T-type three-way connection by being responsible for and being arranged in supervisor side and the branch pipe vertical with supervisor is constituted, supervisor's
For connecting with the vacuum input terminal of vacuum actor, shut-off valve, pressure-regulating valve and vacuum pump are connected to supervisor in turn for one end
The other end, pressure sensor is connected on branch pipe；
The time recorder is used for the setting and timing of test period, and the test period is out of vacuum actor
Portion's pressure is pumped down to test pressure and starts after stablizing.
Preferably, which further includes controller, the controller respectively with pressure sensor, shut-off valve, vacuum pump
With time recorder communication connection；
It adjusts pressure-regulating valve and keeps shut-off valve to open to pressure, controller is tested, and control vacuum pump and vacuum is executed
Device carries out vacuum pumping, when pressure sensor detects that pressure reaches test pressure and stablizes, sends a signal to controller,
Controller closes shut-off valve and vacuum pump, while controlling time recorder and starting timing, at the end of a test period, record
Pressure sensor reading.
Preferably, the pressure-regulating valve is Manual pressure regulating valve.
Preferably, the pressure sensor is keller LEO3 type digital display pressure sensor or Keller PA-
33series digital display pressure sensor.
Preferably, the vacuum actor internal capacity is 30~100mL, when inlet manifold band vacuum voltage regulation chamber,
Total measurement (volume) inside vacuum voltage regulation chamber and vacuum actor is not more than 500mL.
Preferably, the manifold volume between the vacuum input terminal and shut-off valve of the vacuum actor is not more than 2mL.
Using the test method of the air-distributor vacuum actuator leakage test device, comprising the following steps:
S1: record vacuum actor internal capacity Ve, setting test pressure PiniWith test period t0；
S2: vacuum actor is vacuumized, and is reached pressure sensor reading and stablized in test pressure Pini；
S3: shut-off valve and vacuum pump are closed, the timing of a test period is started simultaneously at；
S4: at the end of a test period, vacuum actor internal pressure P is recordedt；
S5: leakage rate Q is calculatedL=Ve·(Pini-Pt)·60/(1x105·t)。
Preferably, the vacuum actor internal capacity is measured by 3D digital-to-analogue or is measured by drainage.
Preferably, leakage rate Q is calculatedLWhen, eliminate the pipeline body between the vacuum input terminal of vacuum actor and shut-off valve
Product influences calculated result bring error.
Compared with prior art, the invention has the following advantages:
(1) vacuum actor leakage is usually that (the usual abrasion does not lead to very big leakage to the abrasion of vacuum actor diaphragm
Gas), cause vacuum to be difficult to maintain, therefore valve block can not be opened.Test device attachment facility of the invention is simple, by effectively right
Existing resource carries out integration recombination, and capital investment is few, and implement it is easy to operate, since test equipment is simple, once find into
The switching of gas manifold is abnormal, live can measure to leakage rate.
(2) measuring accuracy is high, and the present invention replaces flow sensor using pressure sensor, and measuring accuracy depends primarily on
The precision of pressure sensor, and the progress of pressure sensor is generally higher than flow sensor, pressure measurement accuracy can achieve
0.1%F.S. or more, for example, Keller LEO3 type digital display pressure sensor (0.1%F.S.) or Keller PA-33 type
Digital display pressure sensor (0.05%FS digital).
(3) test pressure is manually adjusted by pressure-regulating valve, more pressure measurements may be implemented, without complicated ginseng
Number setting.Pressure after recording initial pressure, and test in experimentation can calculate leakage rate.
(4) applied widely, test device of the invention is applicable to the measurement under positive pressure or condition of negative pressure, pressure test
Range -900mbar~3000mbar.Since vacuum actor operating pressure is negative pressure, vacuum pressure is related generally to.
(5) can in-site measurement take back laboratory without removing product and measure, scene discovery valve block open
Problem is opened, scene excludes vacuum actor leakage problem, accomplished the solution at any time of problem.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the connection schematic diagram of the embodiment of the present invention 2.
In figure, 1 is vacuum actor, and 2 be T-type three-way connection, and 3 be pressure sensor, and 4 be shut-off valve, and 5 are adjusted for pressure
Valve, 6 be vacuum pump, and 7 be time recorder, and 8 be controller.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of air-distributor vacuum actuator leakage test device, as shown in Figure 1, the vacuum for inlet manifold executes
The measurement of the leakage rate in the case where testing pressure of device 1, including T-type three-way connection 2, pressure sensor 3, shut-off valve 4, pressure-regulating valve 5,
Vacuum pump 6 and time recorder 7；
The T-type three-way connection 2 by being responsible for and being arranged in supervisor side and the branch pipe vertical with supervisor is constituted, supervisor's
For connecting with the vacuum input terminal of vacuum actor 1, shut-off valve 4, pressure-regulating valve 5 and vacuum pump 6 are connected in turn for one end
The other end of supervisor, pressure sensor 3 are connected on branch pipe；
The time recorder 7 is used for the setting and timing of test period, and the test period is from vacuum actor 1
Internal pressure is pumped down to test pressure and starts after stablizing.
In the present embodiment, vacuum actor 1 can be variable intake manifold by the vacuum actor of vacuum driving, and vacuum is held
1 internal capacity of row device may range from 30~100mL, and when inlet manifold band vacuum voltage regulation chamber, vacuum voltage regulation chamber and vacuum are held
Total measurement (volume) inside row device 1 is not more than 500mL.Pipeline between the vacuum input terminal and shut-off valve 4 of the vacuum actor 1
Volume is not more than 2mL.Such as can use 8mm outer diameter × 4mm internal diameter T-type three-way connection, branch pipe is as short as possible, is responsible for length
Less than 160mm.According to the precision needs of test, pressure sensor 3 can for keller LEO3 type digital display pressure sensor or
Keller PA-33series digital display pressure sensor.Pressure-regulating valve 5 is Manual pressure regulating valve.Time recorder 7 can be with
Using stopwatch.
Using the test method of above-mentioned air-distributor vacuum actuator leakage test device, after the completion of equipment is connected,
The following steps are included:
S1: record 1 internal capacity V of vacuum actore(mL), setting test pressure Pini(Pa) and test period t0(s)；
S2: vacuum actor 1 is vacuumized, and is reached 3 registration of pressure sensor and stablized in test pressure Pini；
S3: shut-off valve 4 and vacuum pump 6 are closed, the timing of a test period is started simultaneously at；
S4: at the end of a test period, vacuum actor internal pressure P is recordedt(Pa)；
S5: leakage rate Q is calculatedL(mL/min)=Ve·(Pini-Pt)·60/(1x105·t0)。
Wherein, V in the present embodimente=52mL, PiniIt can be adjusted according to test pressure, P in the present embodimentini=-
65000Pa, t0May range from 20~1200s, t in the present embodiment0It is set as 1200s, after a test period, is measured
Pt=-63000Pa.Test temperature can be 23 ± 3 DEG C.
By calculating, QL=52200060/1x105/ 1200=0.052ml/min, the above obtained leakage rate note
For leakage value of the vacuum actor under set pressure.
Vacuum actor internal capacity in the present embodiment can be measured by 3d digital-to-analogue before experiment, can also be passed through
By vacuum actor inner filling water, measuring cup is recycled to pour out water, records internal capacity.The measurement can be before experiment starts
It carries out and records.
Calculate leakage rate QLWhen, the pipeline body between the vacuum input terminal of vacuum actor 1 and shut-off valve 4 can also be eliminated
Product influences calculated result bring error.For the present embodiment, error caused by the pipeline is less than 0.002ml/min (QL=
0.052ml/min, if considering test pipeline, leakage rate 0.054ml/min).
On-line testing or on-the-spot test of the present invention are more advantageous.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, the difference is that, the present embodiment further includes controller 8, the control
Device processed respectively with pressure sensor 3,7 communication connection of shut-off valve 4, vacuum pump 6 and time recorder, as shown in Figure 2.
Pressure-regulating valve 5 is adjusted to test pressure, controller 8 keeps shut-off valve 4 to open, and controls vacuum pump 6 to vacuum
Actuator 1 carries out vacuum pumping, when pressure sensor 3 detects that pressure reaches test pressure and stablizes, sends a signal to
Controller 8, controller 8 close shut-off valve 4 and vacuum pump 6, while controlling time recorder 7 and starting timing, when a test week
At the end of phase, 3 registration of pressure sensor is recorded.
By above-mentioned apparatus, the automation for realizing detection process is carried out, it is often more important that can be further improved test
Precision.
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
The personnel for knowing art technology obviously easily can make various modifications to these embodiments, and general original described herein
It ought to use in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, this field
Technical staff's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in guarantors of the invention
Within the scope of shield.
Claims (9)
1. a kind of air-distributor vacuum actuator leakage test device, which is characterized in that the vacuum for inlet manifold executes
The measurement of device (1) leakage rate in the case where testing pressure, which is characterized in that including T-type three-way connection (2), pressure sensor (3), cut
Only valve (4), pressure-regulating valve (5), vacuum pump (6) and time recorder (7)；
The T-type three-way connection (2) is by being responsible for and being arranged in supervisor side and the branch pipe vertical with supervisor is constituted, and the one of supervisor
End with the vacuum input terminal of vacuum actor (1) for connecting, and shut-off valve (4), pressure-regulating valve (5) and vacuum pump (6) are successively
It is connected to the other end of supervisor, pressure sensor (3) is connected on branch pipe；
The time recorder (7) is used for the setting and timing of test period, and the test period is from vacuum actor (1)
Internal pressure is pumped down to test pressure and starts after stablizing.
2. a kind of air-distributor vacuum actuator leakage test device according to claim 1, which is characterized in that the dress
Setting further includes controller (8), and the controller is remembered with pressure sensor (3), shut-off valve (4), vacuum pump (6) and time respectively
Record instrument (7) communication connection；
Pressure-regulating valve (5) are adjusted to test pressure, controller (8) keeps shut-off valve (4) to open, and it is right to control vacuum pump (6)
Vacuum actor (1) carries out vacuum pumping, when pressure sensor (3) detects that pressure reaches test pressure and stablizes, hair
The number of delivering letters gives controller (8), and controller (8) closes shut-off valve (4) and vacuum pump (6), while controlling time recorder (7) beginning
Timing records pressure sensor (3) registration at the end of a test period.
3. a kind of air-distributor vacuum actuator leakage test device according to claim 1 or 2, which is characterized in that
The pressure-regulating valve (5) is Manual pressure regulating valve.
4. a kind of air-distributor vacuum actuator leakage test device according to claim 1, which is characterized in that described
Pressure sensor (3) be keller LEO3 type digital display pressure sensor or Keller PA-33series digital display pressure sensing
Device.
5. a kind of air-distributor vacuum actuator leakage test device according to claim 1, which is characterized in that described
Vacuum actor (1) internal capacity be 30~100mL, when inlet manifold band vacuum voltage regulation chamber, vacuum voltage regulation chamber and vacuum
The internal total measurement (volume) of actuator (1) is not more than 500mL.
6. a kind of air-distributor vacuum actuator leakage test device according to claim 5, which is characterized in that described
Vacuum actor (1) vacuum input terminal and shut-off valve (4) between manifold volume be not more than 2mL.
7. using the test method of the air-distributor vacuum actuator leakage test device as described in claim 1~6 is any,
Characterized by comprising the following steps:
S1: record vacuum actor (1) internal capacity Ve, setting test pressure PiniWith test period t0；
S2: vacuum actor (1) is vacuumized, and is reached pressure sensor (3) registration and stablized in test pressure Pini；
S3: shut-off valve (4) and vacuum pump (6) are closed, the timing of a test period is started simultaneously at；
S4: at the end of a test period, vacuum actor internal pressure P is recordedt；
S5: leakage rate Q is calculatedL=Ve·(Pini-Pt)·60/(1x105·t)。
8. test method according to claim 7, which is characterized in that described vacuum actor (1) internal capacity passes through
The measurement of 3D digital-to-analogue is measured by drainage.
9. test method according to claim 7, which is characterized in that calculate leakage rate QLWhen, it eliminates vacuum actor (1)
Vacuum input terminal and shut-off valve (4) between manifold volume on calculated result bring error influence.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110285938A (en) * | 2019-07-09 | 2019-09-27 | 劳士领汽车配件（昆山）有限公司 | Plastics weldment airtightness measurement device and its measurement method |
| CN110646151A (en) * | 2019-10-12 | 2020-01-03 | 广州达意隆包装机械股份有限公司 | Method, device, equipment, system and storage medium for leakage detection |
| CN111024335A (en) * | 2019-12-30 | 2020-04-17 | 中核兰州铀浓缩有限公司 | Static boosting freezing measurement device and method for container vacuum test |
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| CN110285938A (en) * | 2019-07-09 | 2019-09-27 | 劳士领汽车配件（昆山）有限公司 | Plastics weldment airtightness measurement device and its measurement method |
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