CN109141726A - Damper internal pressure measuring apparatus and the method for measuring damper internal pressure - Google Patents
Damper internal pressure measuring apparatus and the method for measuring damper internal pressure Download PDFInfo
- Publication number
- CN109141726A CN109141726A CN201710456243.XA CN201710456243A CN109141726A CN 109141726 A CN109141726 A CN 109141726A CN 201710456243 A CN201710456243 A CN 201710456243A CN 109141726 A CN109141726 A CN 109141726A
- Authority
- CN
- China
- Prior art keywords
- internal pressure
- test chamber
- damper
- test
- pressuring shaft
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/16—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention provides a kind of damper internal pressure measuring apparatus comprising part of detecting and pressurized part.The part of detecting includes the pressure sensor of the test chamber for accommodating damper and the internal pressure for measuring test chamber.The pressurized part includes the pressuring shaft that can be protruded into test chamber.In test, the test chamber is sealing state, changes the internal pressure of test chamber by changing the volume that pressuring shaft protrudes into test chamber.The present invention also provides a kind of methods using above-mentioned measuring device measurement damper internal pressure.Damper internal pressure measuring apparatus of the invention and measurement method are easy to use, can measure to the internal pressure of the damper of plurality of specifications and can calculate damper internal pressure value.
Description
Technical field
The present invention relates to a kind of device for pressure measurement and the method for pressure measurement, especially a kind of damper internal pressure
Measuring device and the method for measuring damper internal pressure.
Background technique
Oily rail assembly is to distribute fuel oil to fuel injector by oily rail, then be ejected into engine inlets by fuel injector
Device.The oil spout instruction letter that fuel injector is issued by Engine ECU (Electronic Control Unit, electronic control unit)
Number control.
When fuel injector injection, the fuel oil in oily rail is reduced, pressure reduction, and the inside of oily rail is caused to generate pressure wave
It is dynamic.Pressure oscillation can make oily rail generate vibration and noise, and influence the jeting effect of fuel injector.In order to make fuel injector reach good
Good jeting effect, it is necessary to make the pressure remained steady inside oily rail, and damper is exactly a kind of oily rail internal pressure of holding
Device.
The internal pressure of damper is judged by measuring the sectional dimension of damper at present, because being filled under normal conditions
The sectional dimension of pressure rear damper can be greater than the sectional dimension before pressurization.But this method can not accurately calculate damper
Internal pressure value.
Summary of the invention
The object of the present invention is to provide it is a kind of it is easy to use, the internal pressure of the damper of plurality of specifications can be surveyed
Amount and the measuring device and measurement method that damper internal pressure value can be calculated.
According to an aspect of the present invention, a kind of damper internal pressure measuring apparatus is provided comprising part of detecting and
Pressurized part, the part of detecting include the test chamber for accommodating damper and the internal pressure for measuring test chamber
Pressure sensor, the pressurized part include the pressuring shaft that can be protruded into test chamber, and in test, the test chamber is seal shape
State changes the internal pressure of test chamber by changing the volume that pressuring shaft protrudes into test chamber.
Preferably, the part of detecting further includes the first test end, the second test end and tests end for first
With the second connector for connecting of test end, first test end be equipped with for for pressuring shaft across and into survey
The first intracavitary perforation is tried, second test end is equipped with the pressure sensor interface for connecting pressure sensor.
Preferably, the part of detecting further includes relief valve, is additionally provided with and is used for and relief valve on second test end
It is connected to relief valve interface.
Preferably, the pressurized part further includes the first pressurization end, and first pressurization end is equipped with for pressuring shaft
The second perforation passed through, the first test end and the first pressurization end are fixed together, the first test end and the
The first sealing ring is fixed between one pressurization end.
Preferably, the first test end and the first pressurization end are flange.
Preferably, second perforation includes first part and is connected with first part and is radially greater than first part
Second part, places the second sealing ring in the second part, the pressurized part further include connect with the first pressurization end and
Deformation is brought it about to play the pressing sleeve of sealing effect to the second sealing ring pressure.
Preferably, the pressurized part further includes the second pressurization end, end company that the first pressurization end and second are pressurizeed
The support rod that is connected together and the force-applying piece that can be exerted a force to pressuring shaft, second pressurization end is equipped with to be passed through for force-applying piece
Third perforation.
Preferably, the third perforation is threaded hole, and the force-applying piece includes the screw rod cooperated with threaded hole and is located at
The knob of screw rod tail end, the pressurized part further include being located between the first pressurization end and the second pressurization end and pressurizeing
The shaft coupling that axis is connected together with screw rod.
Preferably, the pressuring shaft can be mobile relative to test chamber, by change pressuring shaft protrude into the length in test chamber come
Change the internal pressure of test chamber.
According to an aspect of the present invention, a kind of side with above-mentioned measuring device measurement damper internal pressure is provided
Method comprising:
Into test chamber, injection is not easy compressed liquid medium and is put into damper；
Change the volume that pressuring shaft protrudes into test chamber to change the internal pressure of test chamber, is calculated by pressure sensor
Pressure change, elta P=P1-P0 out calculates volume delta V=V1-V0 by pressuring shaft, wherein Δ V is that pressuring shaft extend into survey
Intracavitary volume is tried, Δ P is the variation for the internal pressure that pressuring shaft extend into test chamber caused by the volume in test chamber；
It repeats above step and obtains multiple groups Δ P, Δ V data；
Measurement data is input to generation damper internal pressure curve in table, compares known damper internal pressure
Curve graph, to judge the internal pressure of damper.
Preferably, change the volume delta L, Δ L=L1-L0 by changing the length that pressuring shaft protrudes into test chamber,
Δ V=S* Δ L, wherein S is the cross section of pressuring shaft, and Δ L is that pressuring shaft extend into the variation of the length in test chamber.
Damper internal pressure measuring apparatus structure provided by the invention is simple, easy to use, can be to a variety of internal pressures
The power and damper that can calculate damper internal pressure value measures.
Detailed description of the invention
It is to provide further understanding of the invention including attached drawing, they are included and constitute part of this application,
Attached drawing shows the embodiment of the present invention, and plays the role of explaining the principle of the invention together with this specification.In attached drawing:
Fig. 1 is the cross-sectional view of damper internal pressure test device first state of the invention.
Fig. 2 is the enlarged drawing in Fig. 1 at " A ".
Fig. 3 is the cross-sectional view of damper internal pressure the second state of test device of the invention.
Fig. 4 is the cross-sectional view of the damper internal pressure test device third state of the invention.
Fig. 5 is damper internal pressure curve graph of the invention.
Specific embodiment
The embodiment of the present invention is described with detailed reference to attached drawing now.
Referring to shown in Fig. 1 to Fig. 2, the present invention provides a kind of damper internal pressure measuring apparatus 100 comprising test department
Divide 1 and pressurized part 2.Part of detecting 1 includes test chamber 13 for accommodating damper 4 and for measuring in test chamber 13
The pressure sensor (not shown) of portion's pressure.Pressurized part 2 includes the pressuring shaft 24 that can be protruded into test chamber 13.In test,
Test chamber 13 is sealing state, and the inside for changing test chamber 13 by changing the volume that pressuring shaft 24 protrudes into test chamber 13 is pressed
Power.
Pressuring shaft 24 can be mobile relative to test chamber 13, is changed by changing the length that pressuring shaft 24 protrudes into test chamber 13
The internal pressure of test chamber 13.
In test, in order to which the volume change that pressuring shaft 24 protrudes into test chamber 13 is passed to damper 4 well,
It is filled up in test chamber 13 and is not easy compressed liquid medium.Pressuring shaft 24 protrudes into the volume change in test chamber 13 equal to damper 4
Volume change.Preferably, being not easy compressed liquid medium is water.
Part of detecting 1 further includes the first test end 14, second test end 11 and by the first test end 14 and the
The connector 12 that two test ends 11 connect.First test end 14 is equipped with goes forward side by side for passing through for pressuring shaft 24
Enter the first perforation 15 in test chamber 13.Second test end 11 is equipped with the pressure sensing for connecting pressure sensor
Device interface 112.By pressure sensor, the pressure in test chamber 13 can be calculated in real time.
Part of detecting 1 further includes relief valve, is additionally provided on the second test end 11 for being connected to pressure release with relief valve
Valve interface 111.
Pressurized part 2 further includes the first pressurization end 21.First pressurization end 21 is equipped with the passed through for pressuring shaft 24
Two perforation 20.The first test end 14 and the first pressurization end 21 are fixed together, the first test end 14 and the
The first sealing ring 3 is fixed between one pressurization end 21.By the way that the first sealing ring 3 is arranged, prevent air by first from surveying
Gap between examination end 14 and the first pressurization end 21 enters test chamber 13.
Preferably, the first test end 14 and the first pressurization end 21 are flange.First test end 14 and the first pressurization
End 21 is bolted on together.In other embodiments, the first test end 14 and the first pressurization end 21 can also
It is fixed together by other ways such as welding.
Second perforation 20 includes first part 202 and is connected with first part 202 and is radially greater than first part 202
Second part 201.The second sealing ring 23 is placed in second part 202.The pressurized part 2 further include and first pressurization end 21
Connection and the pressing sleeve 22 for making it deform to play sealing effect in radial direction that presses to the second sealing ring 23.Preferably, it presses
Set 22 is stud, and second part 201 is internally threaded, and pressing sleeve 22 and the first pressurization end 21 are consolidated by way of being threadedly engaged
It is scheduled on together.By screwing pressing sleeve 22, the second sealing ring 23 is squeezed, makes the second sealing ring 23 that radial deformation occur, and then pack tightly
Pressuring shaft 24.
Pressurized part 2 further include the second pressurization end 27, by first pressurization end 21 and second pressurization end 27 be connected to
Support rod 26 together and the force-applying piece that can be exerted a force to pressuring shaft 24.Second pressurization end 27 is equipped with wears for force-applying piece 24
The third perforation 271 crossed.
Third perforation 271 is threaded hole.Force-applying piece 28 includes with the screw rod 28 of threaded hole cooperation and positioned at 28 tail of screw rod
The knob 29 at end.Pressurized part 2 further includes being located between the first pressurization end 21 and the second pressurization end 27 and by pressuring shaft 24
The shaft coupling 25 connected together with screw rod 28.Knob 29 is rotated by a direction, so that the precession into test chamber 13 of pressuring shaft 24.
Knob 29 is rotated in the opposite direction, so that pressuring shaft 24 is screwed out out of test chamber 13.
In the present embodiment, length of the pressuring shaft 24 in test chamber 13 is changed by rotation knob 29.At other
In embodiment, length of the pressuring shaft 24 in test chamber 13 can also be changed by other means, for example, changing by cylinder
Position of the pressuring shaft 24 in test chamber 13.
Fig. 1 is that pressuring shaft 24 does not enter the state in test chamber 13 in the present invention.Fig. 3 is 24 part of pressuring shaft in the present invention
State into test chamber 13.Fig. 4 is that pressuring shaft 24 fully enters the state in test chamber 13 in the present invention.Pass through pressuring shaft
24 sectional area S can calculate the volume delta V that pressuring shaft 24 protrudes into test chamber 13.Multi-group data in order to obtain, Ke Yiji
Reading when multiple state of the lower pressuring shaft 24 in test chamber 13.
The present invention also provides a kind of method for measuring 4 internal pressure of damper using above-mentioned measuring device 100, packets
It includes:
Into test chamber 13, injection is not easy compressed liquid medium and is put into damper 4.Preferably, this is not easy compressed liquid Jie
Matter can be water.Entrained gas is unable in test chamber 13.In order to avoid entrained gas, which can grasp in the sink for filling water
Make.In order to guarantee preferable leakproofness, before addition is not easy compressed liquid medium, by pressure sensor and relief valve and pressure
Sensor interface and relief valve interface correctly connect, and guarantee that junction seals No leakage.Preferably, not compressible liquid is being added
Before body medium, pressuring shaft 24 is removed out of test chamber 13.
Change the volume that pressuring shaft 24 protrudes into test chamber 13 to change the internal pressure of test chamber 13, passes through pressure sensing
Device calculates pressure change, elta P=P1-P0, calculates volume delta V=V1-V0 by pressuring shaft 24, wherein Δ V is pressuring shaft
24 extend into the volume change in test chamber 13, and Δ P is that pressuring shaft 24 is extend into caused by the volume change in test chamber 13
The variable quantity of the internal pressure of test chamber 13.In the present embodiment, by rotating clockwise knob 29, until pressure sensor
Reading uniformly increase with the rotation of knob 29, in dimensional measurement area calliper to measure and record original dimension L0 at this time, and
Recording manometer reads P0；Continuing rotation knob 29 makes pressuring shaft 24 promote a distance to test chamber 13 to test chamber 13 again
Pressurization, in dimensional measurement area calliper to measure and records size L1, and recording manometer reads P1.Acquisition can be calculated at this time
One size changing amount Δ L=L1-L0, to release Δ V=S* Δ L, while available Δ P=P1-P0, wherein S is to add
The cross section of last item 24, Δ L are that pressuring shaft 24 extend into the length variable quantity in test chamber 13, L (L1, L0) be shaft coupling 25 with
Spacing between pressing sleeve 22, Δ P are the inside that pressuring shaft 24 extend into test chamber 13 caused by the volume change in test chamber 13
The variable quantity of pressure.
It repeats above step and obtains multiple groups Δ P, Δ V data.The circle number for guaranteeing that each pressing against knob 29 rotates as far as possible is identical
To obtain uniform measured value, until pressuring shaft 24 is fully inserted into test chamber 13, knob 29 can not be continued to rotate, and measurement terminates.
Measurement data is input to generation damper internal pressure curve in table, compares known damper internal pressure
Curve graph, to judge the internal pressure of damper 4.
Fig. 5 is known damper internal pressure curve graph.For the standard resistance of some different size known internal pressure
Buddhist nun's device measures, and establishes known damper internal pressure curve graph.Damper internal pressure curve there are two in detail in this figure,
The internal pressure curve that one is internal pressure when being 0bar, the curvilinear function are y=50.616*x-50.429；Another is
Internal pressure curve when internal pressure is 1.5bar, the curvilinear function are y=41.485*x-66.897.In actual use,
The internal pressure curve can have multiple.In measurement, multiple groups measurement data Δ P, Δ V are input in table and generate damper
Internal pressure curve compares known damper internal pressure curve graph, to judge the internal pressure of damper 4.
Those skilled in the art can be obvious, the above exemplary embodiments of the invention can be carry out various modifications and modification and
Without departing from the spirit and scope of the present invention.Accordingly, it is intended to which present invention covering is made to fall in the appended claims and its equivalence techniques
Modifications of the present invention and modification in aspects.
Claims (11)
1. a kind of damper internal pressure measuring apparatus, which is characterized in that it includes part of detecting (1) and pressurized part (2), institute
Stating part of detecting (1) includes the inside pressure for accommodating the test chamber of damper (4) (13) and for measuring test chamber (13)
The pressure sensor of power, the pressurized part (2) includes the pressuring shaft (24) that can be protruded into test chamber (13), in test, institute
Stating test chamber (13) is sealing state, changes test chamber by changing the volume that pressuring shaft (24) are protruded into test chamber (13)
(13) internal pressure.
2. damper internal pressure measuring apparatus as described in claim 1, which is characterized in that the part of detecting (1) is also wrapped
It includes the first test end (14), the second test end (11) and connects the first test end (14) and the second test end (11)
Pick up the connector (12) come, first test end (14) be equipped with for for pressuring shaft (24) across and into test chamber
(13) the first perforation (15) in, second test end (11) are equipped with the pressure sensor for connecting pressure sensor
Interface (112).
3. damper internal pressure measuring apparatus as claimed in claim 2, which is characterized in that the part of detecting (1) is also wrapped
Relief valve is included, is additionally provided in second test end (11) for being connected to relief valve interface (111) with relief valve.
4. damper internal pressure measuring apparatus as claimed in claim 2, which is characterized in that the pressurized part (2) is also wrapped
The first pressurization end (21) is included, first pressurization end (21) is equipped with the second perforation (20) passed through for pressuring shaft (24),
First test end (14) and the first pressurization end (21) are fixed together, and first test end (14) and first adds
The first sealing ring (3) are fixed between pressure side portion (21).
5. damper internal pressure measuring apparatus as claimed in claim 4, which is characterized in that first test end (14)
It is flange with the first pressurization end (21).
6. damper internal pressure measuring apparatus as claimed in claim 4, which is characterized in that it is described second perforation (20) include
First part (202) and the second part (201) for being connected and being radially greater than first part (202) with first part (202), institute
It states in second part (202) and places the second sealing ring (23), the pressurized part (2) further includes connecting with the first pressurization end (21)
It connects and deformation is brought it about to play the pressing sleeve (22) of sealing effect to the second sealing ring (23) pressure.
7. damper internal pressure measuring apparatus as claimed in claim 4, which is characterized in that the pressurized part (2) is also wrapped
The support rod (26) for including the second pressurization end (27), the first pressurization end (21) and the second pressurization end (27) linking together
And the force-applying piece that can be exerted a force to pressuring shaft (24), second pressurization end (27) are equipped with the third passed through for pressuring shaft (24)
It perforates (271).
8. damper internal pressure measuring apparatus as claimed in claim 7, which is characterized in that third perforation (271) is
Threaded hole, the force-applying piece (28) include with the screw rod (28) of threaded hole cooperation and positioned at the knob of screw rod (28) tail end
(29), the pressurized part (2) further includes being located between the first pressurization end (21) and the second pressurization end (27) and pressurizeing
The shaft coupling (25) that axis (24) is connected together with screw rod (28).
9. damper internal pressure measuring apparatus as described in claim 1, which is characterized in that the pressuring shaft (24) can be opposite
Test chamber (13) is mobile, changes the inside of test chamber (13) by changing the length that pressuring shaft (24) are protruded into test chamber (13)
Pressure.
10. a kind of method with the described in any item measuring device measurement damper internal pressures of claim 1 to 9, feature
It is comprising:
Into test chamber (13), injection is not easy compressed liquid medium and is put into damper (4)；
Change the volume that pressuring shaft (24) are protruded into test chamber (13) to change the internal pressure of test chamber (13), is passed by pressure
Sensor calculates pressure change, elta P=P1-P0, calculates volume delta V=V1-V0 by pressuring shaft (24), wherein Δ V is to add
Last item (24) extend into the volume in test chamber (13), and Δ P is that the volume that pressuring shaft (24) are extend into test chamber (13) causes
Test chamber (13) internal pressure variation；
It repeats above step and obtains multiple groups Δ P, Δ V data；
Measurement data is input to generation damper internal pressure curve in table, compares known damper internal pressure curve
Figure, to judge the internal pressure of damper (4).
11. the method for measuring device measurement damper internal pressure as claimed in claim 10, which is characterized in that pass through change
The length that pressuring shaft (24) protrudes into test chamber (13) changes the volume, Δ L=L1-L0, Δ V=S* Δ L, wherein S is
The cross section of pressuring shaft (24), Δ L are that pressuring shaft (24) extend into the variation of the length in test chamber (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710456243.XA CN109141726A (en) | 2017-06-16 | 2017-06-16 | Damper internal pressure measuring apparatus and the method for measuring damper internal pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710456243.XA CN109141726A (en) | 2017-06-16 | 2017-06-16 | Damper internal pressure measuring apparatus and the method for measuring damper internal pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109141726A true CN109141726A (en) | 2019-01-04 |
Family
ID=64830369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710456243.XA Pending CN109141726A (en) | 2017-06-16 | 2017-06-16 | Damper internal pressure measuring apparatus and the method for measuring damper internal pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109141726A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804576A (en) * | 2006-01-19 | 2006-07-19 | 浙江大学 | Oil elastic modulus detector based on volume elastic modulus definition |
| CN101126405A (en) * | 2007-09-17 | 2008-02-20 | 谢显奇 | Hydraulic precision regulator |
| JP2009250403A (en) * | 2008-04-09 | 2009-10-29 | Fuji Latex Kk | Damper device |
| CN103711830A (en) * | 2013-12-24 | 2014-04-09 | 常州容大结构减振设备有限公司 | Novel intelligent damper |
| CN103940731A (en) * | 2014-04-18 | 2014-07-23 | 中国海洋石油总公司 | Hydraulic oil elasticity modulus and thermal expansion coefficient measuring device |
-
2017
- 2017-06-16 CN CN201710456243.XA patent/CN109141726A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804576A (en) * | 2006-01-19 | 2006-07-19 | 浙江大学 | Oil elastic modulus detector based on volume elastic modulus definition |
| CN101126405A (en) * | 2007-09-17 | 2008-02-20 | 谢显奇 | Hydraulic precision regulator |
| JP2009250403A (en) * | 2008-04-09 | 2009-10-29 | Fuji Latex Kk | Damper device |
| CN103711830A (en) * | 2013-12-24 | 2014-04-09 | 常州容大结构减振设备有限公司 | Novel intelligent damper |
| CN103940731A (en) * | 2014-04-18 | 2014-07-23 | 中国海洋石油总公司 | Hydraulic oil elasticity modulus and thermal expansion coefficient measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bower et al. | A comparison of the Bosch and Zuech rate of injection meters | |
| CN106226216A (en) | A kind of core holding unit and measuring method thereof | |
| CN113138153B (en) | Rock sample holder, rock porosity measurement system and method | |
| CN105806762A (en) | True triaxial coal rock three-dimensional deformation and permeability holder | |
| CN102937551A (en) | Rock triaxial test device based on capacitance imaging | |
| CN109141726A (en) | Damper internal pressure measuring apparatus and the method for measuring damper internal pressure | |
| CN106644771B (en) | A kind of measuring device and measuring method of the rubber volume modulus based on fluid pressure | |
| CN102707033A (en) | Axial pressure device for rock core holder | |
| CN202562913U (en) | Triaxial Core Holder | |
| CN107061094B (en) | A kind of pressure measurement method and device of diesel injector pressure chamber | |
| CN103808456A (en) | Decomposing device for calibrated suite of underwater pressure sensor | |
| CN2786588Y (en) | Anti-impulsion vibration-proof filter for flowing pressure examination | |
| Bilgic et al. | Effects of waveform model on sensitivity values of transducers used in mechanical dynamic measurements | |
| CN105571536A (en) | Equipment for measuring volume deformation amount | |
| CN105092108A (en) | Testing ring for measuring inner and outer radial contact stress of rubber sleeve | |
| CN106525331B (en) | Pen type free field pressure sensor calibration device | |
| CN106153318B (en) | Precise bushing valve couple performance test measuring device | |
| CN207036086U (en) | The unidirectional strain detection testing device of the soil body | |
| CN202562914U (en) | Axial pressure device for rock core holder | |
| CN108254255A (en) | Fluid bulk modulus measuring device and its measuring method under a kind of high pressure conditions | |
| CN218765367U (en) | Transmitter detection tool connecting device and transmitter detection device | |
| CN206862249U (en) | A kind of frock pad for detecting engine cylinder cap pad and compressing thickness | |
| US7918127B2 (en) | Test method for the determination of an oil separation tendency of lubricating greases and test device for carrying out the same | |
| CN211086017U (en) | Tubule experimental apparatus | |
| CN105181277B (en) | A kind of casting pressure-detecting device that the upper and lower flange face of cavity hatch is not parallel |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200108 Address after: 130033 No. 1981, Wuhan Road, Changchun Economic Development Zone, Jilin, China Applicant after: Shibeite automotive electronics (Changchun) Co., Ltd. Address before: 130033 No. 1981, Wuhan road, economic development zone, Changchun City, Jilin Province Applicant before: Continental Automotive Electronics (Changchun) Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 130033 No. 1981, Wuhan Road, Changchun Economic Development Zone, Jilin, China Applicant after: WeiPai automotive electronics (Changchun) Co., Ltd Address before: 130033 No. 1981, Wuhan Road, Changchun Economic Development Zone, Jilin, China Applicant before: Shibeite automotive electronics (Changchun) Co., Ltd. |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |