CN107748040B - Sealing pressure-resistant test device capable of adjusting water pressure - Google Patents
Sealing pressure-resistant test device capable of adjusting water pressure Download PDFInfo
- Publication number
- CN107748040B CN107748040B CN201711143086.3A CN201711143086A CN107748040B CN 107748040 B CN107748040 B CN 107748040B CN 201711143086 A CN201711143086 A CN 201711143086A CN 107748040 B CN107748040 B CN 107748040B
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- water
- pressure
- shell
- sealer shell
- water pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims description 4
- 239000013505 freshwater Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 1
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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Abstract
A sealing pressure-resistant test device capable of adjusting water pressure relates to the technical field of water pressure resistance test of instruments and parts, a water pressure gauge, a pressure sensor, a water inlet, a water outlet and an air outlet which are communicated with an inner cavity of a sealer shell are respectively arranged on the sealer shell, a piston is connected on the sealer shell through a dynamic sealing piece, one end of the piston stretches into the inner cavity of the sealer shell, and the other end of the piston is connected with a piston axial movement control motor; corresponding electromagnetic control valves are respectively arranged at the water inlet, the water outlet and the air outlet, and a water level sensor is also arranged on the air outlet; the signal output end of the water level sensor is connected with the input end of the electromagnetic control valve connected with the water inlet. The invention has simple structure and arrangement, small noise, more accurate and convenient adjustment of water pressure and is beneficial to accurately carrying out pressure resistance test on a test object.
Description
Technical Field
The invention relates to the technical field of water pressure resistance test of instruments, equipment and parts.
Background
When designing underwater products, performance indexes of each unit at a certain water depth are required to be tested, at this time, the tested units can be placed in a sealed container filled with water and having a certain water pressure, and the corresponding water depth is simulated by adjusting the water pressure, so that further tests are carried out.
The existing mature method is to adjust the water pressure through the combination of the water pump and various valves, but has the defects of complex waterway, high noise when the water pump works and the like.
Disclosure of Invention
The invention aims to provide a sealing pressure-resistant test device capable of adjusting water pressure, which is convenient to test.
The invention comprises a sealer shell, a water pressure gauge, a pressure sensor, a water inlet, a water outlet and an exhaust port which are communicated with the inner cavity of the sealer shell are respectively arranged on the sealer shell, and the invention is characterized in that: the sealing device comprises a sealing device shell, a piston, a motor, a piston axial motion control motor, a sealing device and a sealing device, wherein the sealing device shell is connected with the piston through a dynamic sealing element; the water inlet, the water outlet and the air outlet are respectively provided with corresponding electromagnetic control valves, and the air outlet is also provided with a water level sensor; the signal output end of the water level sensor is connected with the input end of the electromagnetic control valve connected with the water inlet.
It is known that water is elastic, and the volume of water of a certain mass changes correspondingly with the pressure change, and the change relation is as follows:
dp= -k dv/v, i.e. dv/v= -dp/k;
wherein dp is the pressure variation, dv is the volume variation, v is the volume, k is the bulk modulus of water, k=2.18×10 9 Pa。
From the above formula, when the volume of water is changed, the water pressure is correspondingly changed.
The present invention has been designed using the above principle.
During the test, each unit is filled into a sealer shell with a known internal volume, the water outlet is closed by an electromagnetic control valve, water is injected into the water inlet by the electromagnetic control valve until a water level sensor on the air outlet shows that the water is full. The water level sensor is used for guaranteeing that the water inlet is automatically closed after the sealer shell is filled with water.
The control center controls the motor to drive the piston to axially move according to the water pressure required by the test through the axial movement of the piston to adjust the water pressure in the sealer shell, and the water pressure is fed back to the control center through the pressure sensor, so that the water pressure in the sealer shell is ensured to reach the test setting requirement, and the control center controls and adjusts the water pressure in the sealer shell in real time.
After the test is finished, the control center sends a signal to the electromagnetic control valve, the water inlet is closed, the air outlet and the water outlet are opened, and water in the sealer shell is discharged.
The invention has simple structure and arrangement, small noise, more accurate and convenient adjustment of water pressure and is beneficial to accurately carrying out pressure resistance test on a test object.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a right side view of fig. 1.
Fig. 3 is a view of fig. 2 in A-A rotated section.
Detailed Description
1. Device structure description:
as shown in fig. 1, 2 and 3, a water pressure gauge 2 and a pressure sensor 3 are respectively arranged on the sealer shell 1, a water inlet 4, a water outlet 5 and an air outlet 6 are respectively communicated with the inner cavity of the sealer shell 1, and corresponding electromagnetic control valves are respectively arranged on the water inlet 4, the water outlet 5 and the air outlet 6 so as to conveniently perform opening or closing actions on the water inlet 4, the water outlet 5 and the air outlet 6 through the corresponding electromagnetic control valves. In addition, a water level sensor is further arranged on the exhaust port 6, and the signal output end of the water level sensor is connected with the input end of the electromagnetic control valve connected with the water inlet 4.
The sealing device is characterized in that a piston 8 is connected to the sealing device shell 1 through a dynamic sealing piece 7, one end of the piston 8 extends into the inner cavity of the sealing device shell 1, and the other end of the piston 8 is connected with a piston axial movement control motor 9.
2. Application:
in this example, the pressure resistance of a dynamic seal and static seal test device of an angle encoder under a water pressure of 3MPa was tested.
The encoder is required to be tested for properties of water repellency at 3mp water pressure, accuracy, response, etc., and can be operated in a single step.
Since the tested encoder needs to be tested under rotation, the invention is connected with a rotating shaft 11 on the sealer shell 1 through another group of dynamic sealing devices, the inner end of the rotating shaft 11 stretches into the sealer shell 1 and is fixedly connected with the rotating shaft of the encoder assembly 10, and the outer end of the rotating shaft 11 is arranged outside the sealer shell 1 and is connected with a group of rotating motors 12.
The size and movement of the piston 8 are calculated before the test:
dv/v= -3 x 106/(2.18 x 10) when dp=3 MPa 9 )= -1.38*10 -3 =-0.138%
After design, the sealed container encoder assembly 10 is hermetically arranged at one end of the sealer shell 1, and the water filling volume of the inner cavity of the sealer shell 1 is 962cm 3 The volume change at a pressure of 3MPa was 0.138% by 962cm 3 =1.323 cm 3 If the diameter of the piston is 10mm, the piston stroke is 1.323 cm 3 3.14/0.5/0.5=1.7 cm, with a piston thrust of 3mpa 3.14 (5×10) -3 ) 2 =235N。
The invention adopts the water level sensor on the air outlet 6 to ensure that the water inlet 4 is automatically closed after the sealer shell 1 is filled with water.
The water pressure adjusting process comprises the following steps: the control center opens the water inlet 4 and the air outlet 6 through corresponding electromagnetic control valves, closes the water outlet 5, injects fresh water into the sealer shell 1, and when the control center detects that the air outlet 6 overflows water, the control center closes the water inlet 4 and the air outlet 6 through corresponding electromagnetic control valves, so that the sealer shell 1 is ensured to be fully filled with water.
The control center adjusts the water pressure in the sealer shell 1 by axially moving the motor driving piston 8 according to the required water pressure of 3MPa, and the water pressure is fed back to the control center through the pressure sensor 3, so that the water pressure in the sealer shell 1 is ensured to reach 3MPa, and the control center controls and adjusts the water pressure in the sealer shell 1 in real time to keep stable at 3MPa.
After the test is finished, the control center closes the water inlet 4 through the corresponding electromagnetic control valve, opens the air outlet 6 and the water outlet 5, and discharges the water in the sealer shell 1.
When the encoder assembly 10 sends out a water inlet alarm signal in the test process, the device can give an alarm in time and send out alarm information to the control center, and the control center executes the pressure relief and drainage actions.
Claims (1)
1. The utility model provides a seal withstand voltage test device of adjustable water pressure, includes the sealer shell, sets up water pressure gauge, pressure sensor respectively on the sealer shell to and water inlet, outlet and the gas vent of sealer shell inner chamber intercommunication, its characterized in that: the sealing device comprises a sealing device shell, a piston motion control motor, a sealing device and a sealing device, wherein the sealing device shell is connected with the piston through a dynamic sealing piece; the water inlet, the water outlet and the air outlet are respectively provided with corresponding electromagnetic control valves, and the air outlet is also provided with a water level sensor; the signal output end of the water level sensor is connected with an electromagnetic control connected with the water inlet
An input end of the valve;
the seal pressure-resistant test device is applied to pressure resistance test of an angle encoder dynamic seal and static seal test device under the water pressure of 3 MPa;
the encoder to be tested needs to be tested under rotation, a rotating shaft is connected to the sealer shell through another group of dynamic sealing devices, the inner end of the rotating shaft stretches into the sealer shell and is fixedly connected with the rotating shaft of the encoder assembly, the outer end of the rotating shaft is arranged outside the sealer shell, and a group of rotating motors are connected to the outer end of the rotating shaft;
the water pressure adjusting process comprises the following steps: the control center opens the water inlet and the air outlet through corresponding electromagnetic control valves, closes the water outlet, injects fresh water into the sealer shell, and when the control center detects that the air outlet overflows water, the control center closes the water inlet and the air outlet through corresponding electromagnetic control valves, so that the sealer shell is fully filled with water;
the control center adjusts the water pressure in the sealer shell by driving the piston to axially move according to the required 3MPa water pressure, the water pressure is fed back to the control center through the pressure sensor, so that the water pressure in the sealer shell is ensured to reach 3MPa, and the control center controls and adjusts the water pressure in the sealer shell in real time to be kept stable at 3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711143086.3A CN107748040B (en) | 2017-11-17 | 2017-11-17 | Sealing pressure-resistant test device capable of adjusting water pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711143086.3A CN107748040B (en) | 2017-11-17 | 2017-11-17 | Sealing pressure-resistant test device capable of adjusting water pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107748040A CN107748040A (en) | 2018-03-02 |
| CN107748040B true CN107748040B (en) | 2024-01-16 |
Family
ID=61252140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711143086.3A Active CN107748040B (en) | 2017-11-17 | 2017-11-17 | Sealing pressure-resistant test device capable of adjusting water pressure |
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| Country | Link |
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| CN (1) | CN107748040B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1344278A (en) * | 1970-02-04 | 1974-01-16 | Aerospatiale | Method and devices for regulating the pressure and its rate of variation in a chamber |
| JPH1123410A (en) * | 1997-07-04 | 1999-01-29 | Hideo Seta | Water pressure withstanding test apparatus and method therefor |
| JP2003343476A (en) * | 2002-05-28 | 2003-12-03 | Ebara Corp | Variable speed water supply device |
| JP2004069298A (en) * | 2002-08-01 | 2004-03-04 | Kubota Corp | Inner pressure application test device |
| JP2005221475A (en) * | 2004-02-09 | 2005-08-18 | Nagaki Seiki Co Ltd | Pressure-proof test machine for hose terminal part for fire-extinguishing |
| JP2007146908A (en) * | 2005-11-24 | 2007-06-14 | Smc Corp | Vacuum pressure adjusting system |
| CN101660963A (en) * | 2009-05-15 | 2010-03-03 | 福建闽机机械科技有限公司 | Sealing intensity blasting test method and device of water heating products |
| CN101881712A (en) * | 2009-05-07 | 2010-11-10 | 刘小成 | Gas cylinder test device by using external measuring method of variable-volume burette |
| JP2011112513A (en) * | 2009-11-26 | 2011-06-09 | Mitsubishi Heavy Ind Ltd | Pressure regulating device, and pressure testing device including the same |
| CN102297749A (en) * | 2011-08-05 | 2011-12-28 | 青岛市兰青环保工程有限公司 | Comprehensive test device for air tightness and water pressure resistance of mining mobile escape capsule |
| CN103323353A (en) * | 2013-07-08 | 2013-09-25 | 大连理工大学 | Dynamic water pressure generator capable of regulating frequency and pressure |
| CN106441718A (en) * | 2016-11-11 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Marine water-pressure-resistant seal pressurizing device |
| CN207515979U (en) * | 2017-11-17 | 2018-06-19 | 扬州曙光光电自控有限责任公司 | A kind of sealing Withstand test device of adjustable hydraulic pressure |
-
2017
- 2017-11-17 CN CN201711143086.3A patent/CN107748040B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1344278A (en) * | 1970-02-04 | 1974-01-16 | Aerospatiale | Method and devices for regulating the pressure and its rate of variation in a chamber |
| JPH1123410A (en) * | 1997-07-04 | 1999-01-29 | Hideo Seta | Water pressure withstanding test apparatus and method therefor |
| JP2003343476A (en) * | 2002-05-28 | 2003-12-03 | Ebara Corp | Variable speed water supply device |
| JP2004069298A (en) * | 2002-08-01 | 2004-03-04 | Kubota Corp | Inner pressure application test device |
| JP2005221475A (en) * | 2004-02-09 | 2005-08-18 | Nagaki Seiki Co Ltd | Pressure-proof test machine for hose terminal part for fire-extinguishing |
| JP2007146908A (en) * | 2005-11-24 | 2007-06-14 | Smc Corp | Vacuum pressure adjusting system |
| CN101881712A (en) * | 2009-05-07 | 2010-11-10 | 刘小成 | Gas cylinder test device by using external measuring method of variable-volume burette |
| CN101660963A (en) * | 2009-05-15 | 2010-03-03 | 福建闽机机械科技有限公司 | Sealing intensity blasting test method and device of water heating products |
| JP2011112513A (en) * | 2009-11-26 | 2011-06-09 | Mitsubishi Heavy Ind Ltd | Pressure regulating device, and pressure testing device including the same |
| CN102297749A (en) * | 2011-08-05 | 2011-12-28 | 青岛市兰青环保工程有限公司 | Comprehensive test device for air tightness and water pressure resistance of mining mobile escape capsule |
| CN103323353A (en) * | 2013-07-08 | 2013-09-25 | 大连理工大学 | Dynamic water pressure generator capable of regulating frequency and pressure |
| CN106441718A (en) * | 2016-11-11 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Marine water-pressure-resistant seal pressurizing device |
| CN207515979U (en) * | 2017-11-17 | 2018-06-19 | 扬州曙光光电自控有限责任公司 | A kind of sealing Withstand test device of adjustable hydraulic pressure |
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|---|---|
| CN107748040A (en) | 2018-03-02 |
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