CN103867536B - A kind of piston accumulator machinery stop bit formula pressure overload protection structure - Google Patents
A kind of piston accumulator machinery stop bit formula pressure overload protection structure Download PDFInfo
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- CN103867536B CN103867536B CN201210533046.0A CN201210533046A CN103867536B CN 103867536 B CN103867536 B CN 103867536B CN 201210533046 A CN201210533046 A CN 201210533046A CN 103867536 B CN103867536 B CN 103867536B
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- accumulator tank
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Abstract
The invention discloses a kind of piston accumulator machinery stop bit formula pressure overload protection structure; including accumulator tank body; it is provided with piston in described accumulator tank body; wherein; described accumulator tank interior is separated into upper space and lower space by described piston; it is provided with gases at high pressure, described lower space is connected with external high pressure liquid device in described upper space；Also include limiting component, described limiting component is arranged on the inwall of described upper space.The present invention can prevent accumulator in extreme circumstances, and internal high-pressure gas are compressed further, leads to the technical problem of pressure overload.
Description
Technical field
The present invention relates to a kind of piston accumulator field, especially a kind of piston accumulator machinery stop bit formula pressure mistake
Carry protection structure.
Background technology
At present, the pressure overload control of hydraulic system piston accumulator mainly adopts Electronic Control, and overflow valve controls
Etc. mode, wherein, electronic control mode mainly adopts：When accumulator is pressurized above specified ultimate value, system is according to pressure
Sensor feedback value, is judged, overload situations such as, then stop motor running, stops accumulator pressurization；Overflow valve controls
Mode mainly adopts：When accumulator is pressurized above specified ultimate value, overflow valve is opened at this pressure, automatically by overload pressure
Power discharges, thus realizing overvoltage protection.But both modes all have the easy deficiency such as inefficacy, poor anti-interference, expense height, once lose
Effect, easily leads to the security risks such as accumulator overload explosion.
Content of the invention
For existing the problems referred to above, now provide a kind of piston accumulator machinery stop bit formula pressure overload protection knot
Structure, prevents accumulator in extreme circumstances, and internal high-pressure gas are compressed further, leads to the technical problem of pressure overload.
Concrete technical scheme is as follows：
A kind of piston accumulator machinery stop bit formula pressure overload protection structure, including accumulator tank body, in described accumulation of energy
Be provided with piston in device tank body, wherein, described tank interior is separated into upper space and lower space by described piston, described on
Portion is provided with gases at high pressure in space, and described lower space is connected with external high pressure liquid device；Also include limiting component, described
Limiting component is arranged on the inwall of described upper space.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described limiting component is arranged on
At the maximum height position that described piston rises.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described limiting component with described
The inwall of upper space forms ladder-type structure.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described limiting component with described
The inwall of upper space is formed as one.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described piston and described tank body
Inner surface contact surface is provided with seal member.
The beneficial effect of technique scheme is：
One of present invention piston accumulator machinery stop bit formula pressure overload protection structure, only relates to shell in setting
The machining in internal portion, does not affect any assembly of other of accumulator it is not necessary to increase extra electronic control system, is not required to
Set up single overflow valve, save hydraulic system input cost.Simultaneously as there is not Electronic Control lost efficacy, or other
The indirect risk that peripheral components inefficacy leads to, therefore, simple and easy to do, safe and reliable.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of piston accumulator machinery stop bit formula pressure overload protection architecture schematic diagram of the present invention.
Fig. 2 is that the piston accumulator machinery stop bit formula pressure overload protection structure of planting of the present invention realizes the knot of overload protection
Structure schematic diagram.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as limiting to the invention.
A kind of piston accumulator machinery stop bit formula pressure overload protection structure, including accumulator tank body 1, in accumulator tank
It is provided with piston 2, wherein, piston 2 will be separated into upper space 3 and lower space 4 inside accumulator tank body 1, and top is empty in body 1
Between be filled with gases at high pressure in 3, lower space 4 is connected with external high pressure liquid device (in figure does not indicate), and lower space 4 is filled with height
Press liquid；
On the basis of such scheme, present invention additionally comprises limiting component 5, limiting component 5 is arranged on the interior of upper space 3
Wall.
In one embodiment of the invention, be provided with piston 2 and the contact surface of accumulator tank body 1 inner surface multiple close
Envelope part 21, this seal member 21 includes seal groove 210, and this seal groove 210 is placed in piston 2 and accumulator tank body 1 contact internal walls
On face, in this seal groove 210, it is provided with seal member 211.In enforcement, this seal groove 210 is a cannelure.
In one embodiment of the invention, limiting component 5 is arranged on 22 at the maximum height position of piston 2 rising.
Specifically, in one embodiment of the invention, limiting component 5 and the inwall of upper space 3 form stairstepping knot
Structure.
In one embodiment of the invention, limiting component 5 and the inwall of upper space 3 are formed as one, in enforcement,
During construction accumulator tank body 1, reserved enough allowance in the blank of accumulation of energy tank body 1, using Digit Control Machine Tool in this accumulation of energy
In the inwall of device tank body 1, corresponding region turning goes out suitable step, thus forming the ladder-type structure of needs.
In enforcement, by the limiting component of the ladder-type structure of setting in accumulator tank body 1, when system is in abnormal conditions
Under, when constantly persistent pressure being carried out to accumulator, limit the travel displacement of piston 2 by this limiting component 5, thus preventing accumulation of energy
In extreme circumstances, upper space 3 internal high-pressure gas are compressed device further, lead to the problem of pressure overload.
Arrange this limiting component 5 when, need according to the specified limiting pressure of accumulator, limit leakage rate, piston stroke with
And the combined factors such as the pressure that can bear of accumulator shell material consider.
Specifically, calculate S at maximum height position by following formulaj：
Po·Vo/T1=Pm·Vx/T2Then Vx=Po·Vo·T2/Pm·T1；
Sj=Vx/π·R2=Po·Vo·T1/Pm·T2·π·R2
Wherein, PoRepresent the pressure initial value of described accumulator tank interior gases at high pressure；VoRepresent described accumulator tank body
The volume initial value of internal high-pressure gas；T1Represent the initial temperature value of described accumulation of energy tank interior gases at high pressure；PmRepresent described
The load rated safety limit pressure that accumulator tank body can bear；VxRepresent high pressure under limiting pressure for the described accumulator tank body
The volumetric quantities that gas reaches；T2Represent the Temperature numerical when reaching capacity pressure value for the described accumulator tank body；SjRepresent described
Height value when piston is in safety marginses position in described accumulator tank body；R2Represent described accumulator tank body endoporus half
Footpath.Above-mentioned formula calculates the S obtainingjValue belongs to the set location of theoretic limiting component 5.
Also need in Practical Calculation consider following factor：First it is contemplated that high when described piston is in extreme position
The pressure loss that body of calming the anger leakage leads to, it is then desired to the numerical value of member-retaining portion compression travel, needs member-retaining portion compression travel
Sv；Second, due to temperature change, particularly under low temperature state, lead to pressure drop, need member-retaining portion pressure stroke St；3rd,
Due to other factorses, the pressure loss that such as gas purity etc. causes, a small amount of pressure stroke Sp need to be retained；Then this limit of final setting
The position S=Sw+Sv+St+Sp of position part 5, is compared with theory α coefficient extreme position Sj, it is necessary to assure S is less than Sj, thus
Both ensure that normal work under various extreme operating conditions for the accumulator, the situation that turn avoid internal gas overvoltage occurs.
The foregoing is only preferred embodiments of the present invention, not thereby limit the claim of the present invention, so
Equivalent structure change done by all utilization description of the invention and diagramatic content, is all contained in protection scope of the present invention.
Claims (5)
1. a kind of piston accumulator machinery stop bit formula pressure overload protection structure, including accumulator tank body, in described accumulator
It is provided with piston it is characterised in that described tank body endoporus is separated into upper space and lower space by described piston in tank body,
It is provided with gases at high pressure, described lower space is connected with external high pressure liquid device in described upper space；Also include limiting section
Part, described limiting component is arranged on the inwall of described upper space；
Described limiting component is arranged at the maximum height position that described piston rises；
Calculated according to following formula at described maximum height position：
Po·Vo/T1=Pm·Vx/T2Then Vx=Po·Vo·T2/Pm·T1；
Sj=Vx/π·R2=Po·Vo·T1/Pm·T2·π·R2
Wherein,
PoRefer to the pressure initial value of described accumulator tank interior gases at high pressure；
VoRefer to the volume initial value of described accumulator tank interior gases at high pressure；
T1Refer to the initial temperature value of described accumulation of energy tank interior gases at high pressure；
PmRefer to the load rated safety limit pressure that described accumulator tank body can bear；
VxRefer to the volumetric quantities that gases at high pressure under limiting pressure for the described accumulator tank body reach；
T2Refer to the Temperature numerical when reaching capacity pressure value for the described accumulator tank body；
SjHeight value when referring to that described piston is in safety marginses position in described accumulator tank body；
R2Refer to described accumulator tank body internal bore radius.
2. piston accumulator according to claim 1 machinery stop bit formula pressure overload protection structure it is characterised in that
Calculate described limiting component position when it is also contemplated that following parameters：
S=Sw+Sv+St+Sp
Wherein,
S refers to the height of the position that described limiting component can be arranged；
SwRefer to the maximum position height value that can reach in normal work for the described piston；
SvAllow for the pressure loss that high pressure gas leakage leads to when described piston is in extreme position, it is then desired to retain
The numerical value of Partial shrinkage stroke；
StIt is in view of due to temperature change, lead to pressure drop, so that the partial pressure travel values retaining；
SpBe in view of due to other factors build-up of pressure lose when, thus retain partial pressure travel values.
3. piston accumulator according to claim 1 machinery stop bit formula pressure overload protection structure is it is characterised in that institute
The inwall stating limiting component with described upper space forms ladder-type structure.
4. piston accumulator according to claim 1 machinery stop bit formula pressure overload protection structure is it is characterised in that institute
The inwall stating limiting component with described upper space is formed as one.
5. piston accumulator according to claim 1 machinery stop bit formula pressure overload protection structure is it is characterised in that institute
The contact surface stating piston with described accumulator tank inner surface is provided with seal member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210533046.0A CN103867536B (en) | 2012-12-11 | 2012-12-11 | A kind of piston accumulator machinery stop bit formula pressure overload protection structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210533046.0A CN103867536B (en) | 2012-12-11 | 2012-12-11 | A kind of piston accumulator machinery stop bit formula pressure overload protection structure |
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| CN103867536A CN103867536A (en) | 2014-06-18 |
| CN103867536B true CN103867536B (en) | 2017-03-01 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6267147B1 (en) * | 2000-07-06 | 2001-07-31 | Pratt & Whitney Canada Corp. | Accumulator/oil tank for journal oil supply |
| DE10161797C1 (en) * | 2001-12-15 | 2003-07-31 | Hydac Technology Gmbh | Piston reservoir for motor vehicle suspension has steel piston and end cap with annular sealing abutment surfaces engaging in end position |
| CN202991711U (en) * | 2012-12-11 | 2013-06-12 | 上海上汽马瑞利动力总成有限公司 | Mechanical stop type pressure overload protection structure for piston type energy accumulator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141302A (en) * | 1996-11-14 | 1998-05-26 | Otix:Kk | Accumulator |
| DE10313241A1 (en) * | 2003-03-25 | 2004-10-21 | Hydac Technology Gmbh | piston accumulators |
-
2012
- 2012-12-11 CN CN201210533046.0A patent/CN103867536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6267147B1 (en) * | 2000-07-06 | 2001-07-31 | Pratt & Whitney Canada Corp. | Accumulator/oil tank for journal oil supply |
| DE10161797C1 (en) * | 2001-12-15 | 2003-07-31 | Hydac Technology Gmbh | Piston reservoir for motor vehicle suspension has steel piston and end cap with annular sealing abutment surfaces engaging in end position |
| CN202991711U (en) * | 2012-12-11 | 2013-06-12 | 上海上汽马瑞利动力总成有限公司 | Mechanical stop type pressure overload protection structure for piston type energy accumulator |
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| CN103867536A (en) | 2014-06-18 |
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