CN102889252A - Supercharging device and supercharging cylinder - Google Patents
Supercharging device and supercharging cylinder Download PDFInfo
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- CN102889252A CN102889252A CN2012103658184A CN201210365818A CN102889252A CN 102889252 A CN102889252 A CN 102889252A CN 2012103658184 A CN2012103658184 A CN 2012103658184A CN 201210365818 A CN201210365818 A CN 201210365818A CN 102889252 A CN102889252 A CN 102889252A
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- 238000001514 detection method Methods 0.000 claims description 8
- 239000004519 grease Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention discloses a supercharging device and a supercharging cylinder, wherein the supercharging device and the supercharging cylinder respectively comprise a first chamber and a second chamber which are separated from each other, a first piston and a second piston are respectively arranged in the two chambers, the two pistons are fixedly connected through piston rods, the two chambers are respectively separated into a rodless chamber and a rod chamber by the two pistons, the first rodless chamber is communicated with a supercharging medium with a first pressure, the second rodless chamber is communicated with a supercharged medium, the second rod chamber is communicated with the second rodless chamber, and the first rod chamber is not communicated with the first rodless chamber so that the supercharged medium has a second pressure which is higher than the first pressure. Therefore, after the pressurization process is balanced in stress, the ratio of the pressure of the pressurized medium to the pressure of the pressurized medium depends only on the ratio of the effective areas of the first piston and the piston rod, and therefore the pressurized medium can be pressurized in a large range. The supercharging device and the supercharging cylinder provided by the invention have simple structures and are easy to manufacture.
Description
Technical field
The present invention relates to the supercharging field of medium, particularly, relate to a kind of supercharging device and a kind of pressurized cylinder.
Background technique
Along with the development of various large-scale engineering machineries, Architectural Equipment etc., for example hydraulic pressure wet goods working medium is carried out supercharging more and more become related domain problem that will solve too impatient to wait.At present, usually adopt a kind of pressurized cylinder to realize supercharging to medium.This pressurized cylinder mainly comprises the booster cavity of connection supercharging medium and the chamber that is pressurized that two covers are pressurized medium, and is pressurized the supercharging of medium by the recently realization of the useful area between two chambeies.
Yet owing to adopting this mode, the supercharging scope of pressurized cylinder of the prior art is less, is generally one times to several times; And the slightly large pressurized cylinder of supercharging scope, perhaps what pressurized cylinder bulky, complex structure perhaps needs carry out supercharging; Thereby so that complex structure, manufacture cost is high.In addition, owing to being difficult to realize fully sealing between two chambeies, be difficult to realize the supercharging between the larger medium of nature difference.For example use gas that liquid is carried out supercharging.
Therefore, provide a kind of simple in structure and pressurized cylinder that the supercharging scope is large to have positive effect.
Summary of the invention
An object of the present invention is to provide a kind of supercharging device, this supercharging device is simple in structure, designs ingeniously, and can realize powerful supercharging to being pressurized medium.
Another object of the present invention provides a kind of pressurized cylinder, and this pressurized cylinder is simple in structure, design ingenious, and can be to being pressurized the powerful supercharging of media implementation.
To achieve these goals, the invention provides a kind of supercharging device, described supercharging device comprises the first chamber and second chamber of mutual separation, be provided with the first piston that can move along described the first chamber in described the first chamber, be provided with second piston that can move along described the second chamber in described the second chamber, and described first piston is fixedly connected with by piston rod with the second piston, wherein, described first piston is separated into the first rodless cavity and the first rod chamber with described the first chamber, this second piston is separated into the second rodless cavity and the second rod chamber with described the second chamber, wherein, described the first rodless cavity is communicated with the supercharging medium with first pressure, described the second rodless cavity be pressurized medium and be communicated with, and described the second rod chamber and described the second rodless cavity are communicated with, described the first rod chamber and described the first rodless cavity are not communicated with, so that the described medium that is pressurized has the second pressure greater than described the first pressure.
Preferably, be provided with the first interface that is pressurized medium for delivery of described on described the second chamber, described the second rodless cavity and described the second rod chamber all are communicated with this first interface.
Preferably, be provided with the second interface for delivery of described supercharging medium on described the first chamber, this second interface is communicated with described the first rodless cavity, and also is provided with the 3rd interface that is communicated with described the first oil cylinder chamber on described the first chamber, and the 3rd interface is for delivery of lubricant grease.。
Preferably, described pressurized cylinder comprises the device for detecting distance of travel for detection of the stroke of described first piston and/or described the second piston.
According to a further aspect in the invention, a kind of pressurized cylinder is provided, described pressurized cylinder comprises cylinder barrel and cylinder bottom, described cylinder bottom is divided into the first chamber and the second chamber with the inner space of described cylinder barrel, be provided with the first piston that can move along described the first chamber in described the first chamber, be provided with second piston that can move along described the second chamber in described the second chamber, and described first piston is fixedly connected with by piston rod with the second piston, this piston rod passes described cylinder bottom slidably, wherein, described first piston is separated into the first rodless cavity and the first rod chamber with described the first chamber, this second piston is separated into the second rodless cavity and the second rod chamber with described the second chamber, wherein, described the first rodless cavity is communicated with the supercharging medium with first pressure, described the second rodless cavity be pressurized medium and be communicated with, and described the second rod chamber and described the second rodless cavity are communicated with, described the first rod chamber and described the first rodless cavity are not communicated with, so that the described medium that is pressurized has the second pressure greater than described the first pressure.
Preferably, be provided with the first interface that is pressurized medium for delivery of described on described the second chamber, described the second rodless cavity and described the second rod chamber all are communicated with this first interface.
Preferably, described first interface is arranged on the described cylinder barrel corresponding with described the second rodless cavity, and described the second rod chamber is communicated with described first interface by pipeline.
Preferably, be provided with the second interface for delivery of described supercharging medium on described the first chamber, this second interface is communicated with described the first rodless cavity, and also is provided with the 3rd interface that is communicated with described the first oil cylinder chamber on described the first chamber, and the 3rd interface is for delivery of lubricant grease.
Preferably, described pressurized cylinder comprises the device for detecting distance of travel for detection of the stroke of described first piston and/or described the second piston.
Preferably, described device for detecting distance of travel comprises indicating arm and cuing scale, described cuing scale is fixed on the end of described cylinder barrel, and an end of described indicating arm is fixed on the described first piston, and the other end of described indicating arm passes the end of described cylinder barrel and can move along described cuing scale.
Preferably, the end of described cylinder barrel is fixed with the protective housing that hides described cuing scale.
Technological scheme by above-mentioned ingehious design, because the second rod chamber and the second rodless cavity are interconnected, and the first rod chamber and the first rodless cavity are not communicated with mutually, therefore after pressurization obtains stress balance, the second pressure that is pressurized medium will depend on the useful area of first piston and the ratio of piston rod useful area with the ratio of the first pressure of supercharging medium, and irrelevant with the useful area of the second piston, therefore can carry out supercharging to being pressurized medium on a large scale.And supercharging device provided by the invention and pressurized cylinder be simple in structure, be easy to make and practical.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sectional structure schematic diagram of the pressurized cylinder that provides of the preferred embodiment for the present invention.
Description of reference numerals
1 first chamber, 2 second chambers
3 first pistons, 4 second pistons
5 piston rods, 6 cylinder barrels
8 device for detecting distance of travel, 9 protective housings
11 first rodless cavities, 12 first rod chambers
21 second rodless cavities, 22 second rodless cavities
61 pipelines, 62 cylinder bottoms
63 Sealings, 81 indicating arms
82 cuing scales
A first interface B the second interface
C the 3rd interface
P0 the first pressure P 1 second pressure
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
At first, need to prove, below in conjunction with Fig. 1 mainly to a kind of preferred implementation of supercharging device provided by the invention, be that pressurized cylinder provided by the invention describes, the integral type pressurized cylinder of this supercharging device in optimal way provided by the invention, can also by two independently cylinder body docking form.Can also be different from the preferred embodiment for the present invention in addition and can realize the two-stage supercharging mode, supercharging device provided by the invention can also be realized more multistage supercharging, for example adopts the mode of a plurality of pressurized cylinders provided by the invention of connecting successively to realize.Therefore; as long as under the design of supercharging device provided by the invention; namely adopt structure provided by the invention; utilize the mode of decision supercharging multiple of the useful area of first piston and piston rod, various other not mentioned mode of executions that are different from the preferred embodiment for the present invention all drop in protection scope of the present invention.
As shown in Figure 1, in preferred implementation of the present invention, a kind of pressurized cylinder is provided, pressurized cylinder comprises cylinder barrel 6 and cylinder bottom 62, cylinder bottom 62 is divided into the first chamber 1 and the second chamber 2 with the inner space of cylinder barrel 6, be provided with the first piston 3 that can move along the first chamber 1 in the first chamber 1, be provided with second piston 4 that can move along the second chamber 2 in the second chamber 2, and first piston 3 is fixedly connected with by piston rod 5 with the second piston 4, this piston rod 5 passes cylinder bottom 62 slidably, wherein, the two ends of cylinder barrel 6 can be by end cap (not sign) sealing, thereby can realize that the second piston 4 can move simultaneously with first piston 4, namely two pistons can pass through piston rod 5 transmission power.
Wherein, first piston 3 is separated into the first rodless cavity 11 and the first rod chamber 12 with the first chamber 1, this second piston 4 is separated into the second rodless cavity 21 and the second rod chamber 22 with the second chamber 2, wherein, the first rodless cavity 11 is communicated with the supercharging medium with first pressure P 0, is about to the first rodless cavity 11 as booster cavity, the second rodless cavity 21 be pressurized medium and be communicated with, and the second rod chamber 22 and the second rodless cavity 21 are communicated with, and are about to the second rodless cavity 21 and the second rod chamber 22 as being pressurized chamber.And in pressurization, the first rod chamber 12 and the first rodless cavity 11 are not communicated with, and have the second pressure P 1 greater than the first pressure P 0 so that be pressurized medium.
Wherein in order to analyze the principle that adopts pressurized cylinder provided by the invention to carry out supercharging to being pressurized medium, the useful area of at first supposing first piston 3 is A1, the useful area of the second piston 4 is A2, the useful area of piston rod 5 is A3, and wherein mentioned " useful area " is effective lifting surface area on these parts among the present invention.Therefore, the power of 11 pairs of first pistons 3 of the first rodless cavity is P0 * A1, direction left, the power of 21 pairs of the second pistons 4 of the second rodless cavity is P1 * A2, direction to the right, in addition, because the second rod chamber 22 is communicated with the second rodless cavity 21, therefore equally can be to the second piston 4 generation power, this power is that P1 * (A2-A3), direction is left.The noun of locality used in the present invention wherein, for example " left and right " is the direction shown in the drawing.
Therefore, after the process that adopts pressurized cylinder provided by the invention to carry out supercharging obtains equilibrium of forces, namely above-mentioned three power make a concerted effort equal at 0 o'clock, can access equation: P0 * A1=P1 * A2-P1 * (A2-A3); Therefore, can obtain P1/P0=A1/A3, namely the ratio of the first pressure P 0 before the second pressure P 1 after the supercharging and the supercharging only depends on the ratio of the useful area of first piston 3 and piston rod 5, and irrelevant with the area of the second piston 4.Because usually under the state, the area of piston rod will be much smaller than the area of piston, therefore, the supercharging scope of the lifting pressurized cylinder provided by the invention that ratio between the useful area of first piston 3 and piston rod 5 can large multiplying power only need be set, for example in preferred implementation of the present invention, because the area of piston rod 5 is little a lot of with respect to the area of first piston 3, therefore can supercharging more than 20 times.
In addition, owing to adopting the supercharging device provided by the invention of above-mentioned principle, need not adopt the mode that strengthens booster cavity and be pressurized the size in chamber to realize the increase of supercharging scope, therefore simple in structure, the convenient manufacturing.For example in pressurized cylinder provided by the invention, can be so that the sectional area of cylinder barrel 6 remain unchanged, first piston 3 and the second piston 4 that therefore formed objects is set get final product, and overall structure is simple, is easy to manufacturing.
In addition, owing to being full of the first rodless cavity 11 of supercharging medium and for being full of to isolate between the second chamber that is pressurized medium the first rod chamber 12 being arranged, therefore supercharging device provided by the invention and pressurized cylinder can guarantee better booster cavity and be pressurized sealing between the chamber, so that can carry out the supercharging operation by the larger medium of usage variance.For example use compression volume that hydraulic oil is carried out supercharging.Certainly, in order further to guarantee the sealing of involving chamber, also can be between first piston 3 and cylinder barrel 6, equipotential installs Sealing 63 between the second piston 3 and the cylinder barrel 6, between cylinder bottom 62 and the cylinder barrel 6 and between piston cylinder 5 and the cylinder bottom 62, the seal 63 can be any Sealing well known in the art, such as O type circle, sealing gasket etc.
In preferred implementation of the present invention, as shown in Figure 1, preferably, be provided with on the second chamber 1 for delivery of the first interface A that is pressurized medium in addition, the second rodless cavity 21 and the second rod chamber 22 all are communicated with this first interface A.Namely realize the connection of the second rod chamber 22 and the second rodless cavity 21 by the first interface A that carries the supercharging medium.More specifically, first interface A is arranged on the cylinder barrel 6 corresponding with the second rodless cavity 21, and the second rod chamber 22 is communicated with first interface A by pipeline 61.Except this mode, in other NM preferred implementations, can also be by processing through hole at the second piston 4, to realize the connection of the second rod chamber 22 and the second rodless cavity 21, therefore still can not have influence on the relation of of the present invention P1/P0=A1/A3 because two chambeies all deduct the sectional area of this identical through hole to the useful area of the second piston 4 this moment.In addition, the second rod chamber 22 that can expect for other those skilled in the art and the mode of communicating of the second rodless cavity 21 all drop in protection scope of the present invention.
In addition, preferably, be provided with the second interface B for delivery of the supercharging medium on the first chamber 1, this second interface B is communicated with the first rodless cavity 11, so that the supercharging medium to be provided, and for example pressurized air or hydraulic oil.And, also being provided with the 3rd interface C that is communicated with the first oil cylinder chamber 12 on the first chamber 1, the 3rd interface C is for delivery of lubricant grease.Therefore can be so that first piston 3 lubricated convenient.In addition, because guarantee that first piston 3 can be in the 1 interior movement of the first chamber, therefore, the first rod chamber 12 should have the ability of discharging medium and filling into medium, this moment, the 3rd interface C can also be communicated with atmosphere, thereby so that the situation of negative pressure of vacuum can not appear in the first rod chamber 12.
In order to indicate more easily the pressurized effect of supercharging device provided by the invention and pressurized cylinder, also can comprise the device for detecting distance of travel 8 for detection of the stroke of first piston 3 and/or the second piston 4.The kind of the trip detection device 8 has multiple, detects the stroke of first piston 3 and/or the second piston 4 such as modes such as using approach switch, displacement transducer.Wherein as a kind of preferred embodiment, in the present invention, can realize by simple device for detecting distance of travel 8, particularly, the trip detection device 8 comprises indicating arm 81 and cuing scale 82, cuing scale 82 is fixed on the end of cylinder barrel 6, and an end of indicating arm 81 is fixed on the first piston 3, and the other end of indicating arm 81 passes the end of cylinder barrel 6 and can move along cuing scale 82.Namely can demonstrate in real time the travel position of first piston 3.Also can be fixed with in the end of cylinder barrel 6 protective housing 9 that hides cuing scale 82 in order to protect cuing scale 82 and indicating arm 81 this moment in addition.Thereby can protect the trip detection device 8 not disturbed by external factor.Wherein, the transparent parts such as window of observing cuing scale 82 can be set, can learn the travel position of first piston 3 on this protective housing 9.
It should be noted that owing on first piston 3, also being fixed with indicating arm this moment, so that the useful area of first piston 3 in the first rodless cavity 11 should be for the area of the area of first piston 3 and indicating arm 81 is poor.
To sum up, supercharging device provided by the invention and pressurized cylinder pass through ingehious design, the large increase supercharging scope of multiplying power, and the mode of the ratio of the useful area by regulating piston bar and first piston can be so that supercharging device provided by the invention and pressurized cylinder be simple in structure, easily manufactured.Therefore, so that supercharging device provided by the invention and pressurized cylinder have higher practicability and promotional value.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. supercharging device, it is characterized in that, described supercharging device comprises the first chamber (1) and second chamber (2) of mutual separation, being provided with in described the first chamber (1) can be along the mobile first piston (3) of described the first chamber (1), being provided with in described the second chamber (2) can be along mobile the second piston (4) of described the second chamber (2), and described first piston (3) is fixedly connected with by piston rod (5) with the second piston (4)
Wherein, described first piston (3) is separated into the first rodless cavity (11) and the first rod chamber (12) with described the first chamber (1), this second piston (4) is separated into the second rodless cavity (21) and the second rod chamber (22) with described the second chamber (2), wherein, described the first rodless cavity (11) is communicated with the supercharging medium with first pressure (P0), described the second rodless cavity (21) be pressurized medium and be communicated with, and described the second rod chamber (22) and described the second rodless cavity (21) are communicated with, described the first rod chamber (12) and described the first rodless cavity (11) are not communicated with, so that the described medium that is pressurized has the second pressure (P1) greater than described the first pressure (P0).
2. supercharging device according to claim 1, it is characterized in that, be provided with the first interface (A) that is pressurized medium for delivery of described on described the second chamber (1), described the second rodless cavity (21) and described the second rod chamber (22) all are communicated with this first interface (A).
3. supercharging device according to claim 1 and 2, it is characterized in that, be provided with the second interface (B) for delivery of described supercharging medium on described the first chamber (1), this second interface (B) is communicated with described the first rodless cavity (11), and also be provided with the 3rd interface (C) that is communicated with described the first oil cylinder chamber (12) on described the first chamber (1), the 3rd interface (C) is for delivery of lubricant grease.
4. pressurized cylinder according to claim 1 and 2 is characterized in that, described pressurized cylinder comprises the device for detecting distance of travel (8) for detection of the stroke of described first piston (3) and/or described the second piston (4).
5. pressurized cylinder, it is characterized in that, described pressurized cylinder comprises cylinder barrel (6) and cylinder bottom (62), described cylinder bottom (62) is divided into the first chamber (1) and the second chamber (2) with the inner space of described cylinder barrel (6), being provided with in described the first chamber (1) can be along the mobile first piston (3) of described the first chamber (1), being provided with in described the second chamber (2) can be along mobile the second piston (4) of described the second chamber (2), and described first piston (3) is fixedly connected with by piston rod (5) with the second piston (4), this piston rod (5) passes described cylinder bottom (62) slidably
Wherein, described first piston (3) is separated into the first rodless cavity (11) and the first rod chamber (12) with described the first chamber (1), this second piston (4) is separated into the second rodless cavity (21) and the second rod chamber (22) with described the second chamber (2), wherein, described the first rodless cavity (11) is communicated with the supercharging medium with first pressure (P0), described the second rodless cavity (21) be pressurized medium and be communicated with, and described the second rod chamber (22) and described the second rodless cavity (21) are communicated with, described the first rod chamber (12) and described the first rodless cavity (11) are not communicated with, so that the described medium that is pressurized has the second pressure (P1) greater than described the first pressure (P0).
6. pressurized cylinder according to claim 5, it is characterized in that, be provided with the first interface (A) that is pressurized medium for delivery of described on described the second chamber (1), described the second rodless cavity (21) and described the second rod chamber (22) all are communicated with this first interface (A).
7. pressurized cylinder according to claim 6, it is characterized in that, described first interface (A) is arranged on the described cylinder barrel (6) corresponding with described the second rodless cavity (21), and described the second rod chamber (22) is communicated with described first interface (A) by pipeline (61).
8. according to claim 5 or 6 described supercharging devices, it is characterized in that, be provided with the second interface (B) for delivery of described supercharging medium on described the first chamber (1), this second interface (B) is communicated with described the first rodless cavity (11), and also be provided with the 3rd interface (C) that is communicated with described the first oil cylinder chamber (12) on described the first chamber (1), the 3rd interface (C) is for delivery of lubricant grease.
9. according to claim 5 or 6 described pressurized cylinders, it is characterized in that, described pressurized cylinder comprises the device for detecting distance of travel (8) for detection of the stroke of described first piston (3) and/or described the second piston (4).
10. pressurized cylinder according to claim 9, it is characterized in that, described device for detecting distance of travel (8) comprises indicating arm (81) and cuing scale (82), described cuing scale (82) is fixed on the end of described cylinder barrel (6), one end of described indicating arm (81) is fixed on the described first piston (3), and the other end of described indicating arm (81) passes the end of described cylinder barrel (6) and can move along described cuing scale (82).
11. pressurized cylinder according to claim 10 is characterized in that, the end of described cylinder barrel (6) is fixed with the protective housing (9) that hides described cuing scale (82).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210365818.4A CN102889252B (en) | 2012-09-27 | 2012-09-27 | Supercharging device and supercharging cylinder |
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|---|---|---|---|
| CN201210365818.4A CN102889252B (en) | 2012-09-27 | 2012-09-27 | Supercharging device and supercharging cylinder |
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| CN102889252A true CN102889252A (en) | 2013-01-23 |
| CN102889252B CN102889252B (en) | 2015-04-29 |
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| CN109681480A (en) * | 2019-01-29 | 2019-04-26 | 中国重型机械研究院股份公司 | A kind of pipe end hydrostatic testing machine booster and method |
| CN112483511A (en) * | 2020-12-08 | 2021-03-12 | 四川凌峰航空液压机械有限公司 | Variable pressure ratio hydraulic pressure boost test system |
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|---|---|---|---|---|
| CN103629366A (en) * | 2013-11-06 | 2014-03-12 | 中联重科股份有限公司 | Pressure increasing valve and lubricating system |
| CN103629366B (en) * | 2013-11-06 | 2016-03-02 | 中联重科股份有限公司 | Pressure increasing valve and lubricating system |
| CN109681480A (en) * | 2019-01-29 | 2019-04-26 | 中国重型机械研究院股份公司 | A kind of pipe end hydrostatic testing machine booster and method |
| CN109681480B (en) * | 2019-01-29 | 2024-01-23 | 中国重型机械研究院股份公司 | Supercharger and method for pipe end hydrostatic testing machine |
| CN112483511A (en) * | 2020-12-08 | 2021-03-12 | 四川凌峰航空液压机械有限公司 | Variable pressure ratio hydraulic pressure boost test system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102889252B (en) | 2015-04-29 |
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