CN103867536A - Mechanical stop type pressure overload protection structure of piston accumulator - Google Patents
Mechanical stop type pressure overload protection structure of piston accumulator Download PDFInfo
- Publication number
- CN103867536A CN103867536A CN201210533046.0A CN201210533046A CN103867536A CN 103867536 A CN103867536 A CN 103867536A CN 201210533046 A CN201210533046 A CN 201210533046A CN 103867536 A CN103867536 A CN 103867536A
- Authority
- CN
- China
- Prior art keywords
- piston
- accumulator
- overload protection
- protection structure
- pressure
- 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.)
- Granted
Links
Images
Landscapes
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention discloses a mechanical stop type pressure overload protection structure of a piston accumulator. The mechanical stop type pressure overload protection structure comprises an accumulator tank; a piston is arranged in the accumulator tank; the inside of the accumulator tank is divided into an upper portion space and a lower portion space through the piston; the high-pressure gas is arranged in the upper portion space; the lower portion space is connected with an external high-pressure liquid device; the mechanical stop type pressure overload protection structure also comprises a limiting part which is arranged on the inner wall of the upper portion space. According to the mechanical stop type pressure overload protection structure of the piston accumulator, the technical problem of pressure overload due to the fact that the internal high-pressure gas is further compressed when the accumulator is located under the extreme conditions can be solved.
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 overload protection structure.
Background technique
At present, hydraulic system is controlled the main electronic control that adopts by the pressure overload of piston accumulator, the modes such as relief valve control, wherein, electronic control mode mainly adopts: in the time that accumulator pressurizes over proof limiting value, system is according to pressure transducer value of feedback, judge, as there is overload situations, and stop motor running, stop accumulator pressurization; Relief valve control mode mainly adopts: in the time that accumulator pressurizes over proof limiting value, relief valve is opened under this pressure, automatically overload pressure is discharged, thereby realizes overvoltage protection.But these two kinds of modes all exist easy inefficacy, poor anti-interference, the high deficiency of expense, once lose efficacy, very easily cause the security risks such as accumulator overload explosion.
Summary of the invention
For the problems referred to above of existing existence, a kind of piston accumulator machinery stop bit formula pressure overload protection structure is now provided, prevent that accumulator is under extreme case, internal high pressure gas is further compressed, causes the technical problem of pressure overload.
Concrete technological scheme is as follows:
A kind of piston accumulator machinery stop bit formula pressure overload protection structure, comprise accumulator tank body, in described accumulator tank body, be provided with piston, wherein, described tank interior is separated into upper space and lower space by described piston, in described upper space, be provided with pressurized gas, described lower space is connected with external high pressure liquid device; Also comprise limit position part, described limit position part is arranged on the inwall of described upper space.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described limit position part is arranged on the maximum height position that described piston rises.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, the inwall of described limit position part and described upper space forms ladder-type structure.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, the inwall of described limit position part and described upper space is formed as one.
Above-mentioned piston accumulator machinery stop bit formula pressure overload protection structure, wherein, described piston and described tank inner surface surface of contact are provided with sealed member.
The beneficial effect of technique scheme is:
A kind of piston accumulator machinery stop bit formula pressure overload protection structure in the present invention; in the time arranging, only relate to the machining of enclosure interior; do not affect other any assembly of accumulator; do not need to increase extra electronic control system; do not need to set up independent relief valve, saved hydraulic system input cost.Meanwhile, owing to not existing electronic control to lose efficacy, or other peripheral components indirect risk causing that lost efficacy, therefore, simple and easy to do, safe and reliable.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of piston accumulator machinery stop bit formula pressure overload protection structure structural representation of the present invention.
Fig. 2 is the structural representation that of the present invention kind of piston accumulator machinery stop bit formula pressure overload protection structure realizes overload protection.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
A kind of piston accumulator machinery stop bit formula pressure overload protection structure, comprise accumulator tank body 1, in accumulator tank body 1, be provided with piston 2, wherein, accumulator tank body 1 interior separation is become upper space 3 and lower space 4 by piston 2, in upper space 3, be filled with pressurized gas, lower space 4 is connected with external high pressure liquid device (not indicating in figure), and lower space 4 is filled with highly pressurised liquid;
On such scheme basis, the present invention also comprises limit position part 5, and limit position part 5 is arranged on the inwall of upper space 3.
In one embodiment of the invention, piston 2 is provided with multiple sealed members 21 with the surface of contact place of accumulator tank body 1 internal surface, sealing parts 21 comprise seal groove 210, sealing groove 210 is placed on piston 2 and accumulator tank body 1 inwall surface of contact, is provided with sealed member 211 in sealing groove 210.In enforcement, sealing groove 210 is a circular groove.
In one embodiment of the invention, limit position part 5 is arranged on the maximum height position 22 that piston 2 rises.
Particularly, in one embodiment of the invention, limit position part 5 forms ladder-type structure with the inwall of upper space 3.
In one embodiment of the invention, limit position part 5 is formed as one with the inwall of upper space 3, in enforcement, in the time of structure accumulator tank body 1, reserved enough machining allowance in the blank of accumulation of energy tank body 1, use numerical control machine tool corresponding region turning in the inwall of this accumulator tank body 1 to go out suitable step, thereby form the ladder-type structure needing.
In enforcement, by the limit position part of the ladder-type structure of setting in accumulator tank body 1, when system is under abnormal conditions, while constantly accumulator being carried out to persistent pressure, by the travel displacement of these limit position part 5 limited piston 2, thereby prevent that accumulator is under extreme case, upper space 3 internal high pressure gases are further compressed, cause the problem of pressure overload.
In the time that this limit position part 5 is set, the combined factors such as the pressure that need to can bear according to accumulator rating plate limits pressure, limit leakage rate, piston stroke and accumulator shell material are considered.
Particularly, calculate maximum height position S by following formula
j:
P
ov
o/ T
1=P
mv
x/ T
2vx=P
ov
ot
2/ P
mt
1;
S
j?＝?V
x/π·R
2?＝?P
o·V
o·T
1/P
m·T
2·π·R
2
Wherein, P
orepresent the pressure initial value of described accumulator tank interior pressurized gas; V
orepresent the volume initial value of described accumulator tank interior pressurized gas; T
1represent the initial temperature value of described accumulation of energy tank body internal high pressure gas; P
mrepresent the load rated safety ultimate pressure value that described accumulator tank body can bear; V
xrepresent the volume numerical value that the pressurized gas of described accumulator tank body under ultimate pressure reach; T
2represent the Temperature numerical of described accumulator tank body in the time reaching capacity force value; S
jrepresent described piston height value in the time of safety margins position in described accumulator tank body; R represents pore radius in described accumulator tank body.Above-mentioned formula calculates the S obtaining
jvalue belongs to the setting position of theoretic limit position part 5.
In the time of Practical Calculation, also need to consider following factor: the first, consider in the described piston pressure loss that high pressure gas leakage causes during in limit position, thereby, need the numerical value of reserve part compression stroke, need reserve part compression stroke Sv; The second, due to temperature variation, particularly, under low-temperature condition, cause pressure drop, need reserve part pressure stroke St; The 3rd, due to other factors, as the pressure loss that gas purity etc. causes, need to retain a small amount of pressure stroke Sp; The position S=Sw+Sv+St+Sp of final this limit position part 5 arranging, position Sj compares with theoretical safety margins, must guarantee that S is less than Sj, thereby both guarantee the normal work of accumulator under various extreme operating conditions, avoid again the situation of internal gas overvoltage to occur.
The foregoing is only preferred embodiment of the present invention, not thereby limit claim of the present invention, so the equivalent structure that all utilizations specification of the present invention and diagramatic content have been done changes, be all included in protection scope of the present invention.
Claims (7)
1. a piston accumulator machinery stop bit formula pressure overload protection structure, comprise accumulator tank body, in described accumulator tank body, be provided with piston, it is characterized in that, described tank body endoporus is separated into upper space and lower space by described piston, in described upper space, be provided with pressurized gas, described lower space is connected with external high pressure liquid device; Also comprise limit position part, described limit position part is arranged on the inwall of described upper space.
2. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 1, is characterized in that, described limit position part setting is less than the maximum height position that described piston rises.
3. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 2, is characterized in that, described maximum height position calculates according to following formula:
P
ov
o/ T
1=P
mv
x/ T
2vx=P
ov
ot
2/ P
mt
1;
S
j?＝?V
x/π·R
2?＝?P
o·V
o·T
1/P
m·T
2·π·R
2
Wherein,
P
orefer to the pressure initial value of described accumulator tank interior pressurized gas;
V
orefer to the volume initial value of described accumulator tank interior pressurized gas;
T
1refer to the initial temperature value of described accumulation of energy tank body internal high pressure gas;
P
mrefer to the load rated safety ultimate pressure value that described accumulator tank body can bear;
V
xrefer to the volume numerical value that the pressurized gas of described accumulator tank body under ultimate pressure reach;
T
2refer to the Temperature numerical of described accumulator tank body in the time reaching capacity force value;
S
jrefer to described piston height value in the time of safety margins position in described accumulator tank body;
R refers to pore radius in described accumulator tank body.
4. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 3, is characterized in that, in the time calculating the position of described limit position part, also considers following parameters:
S=S
w＋S
v＋S
t＋S
p
Wherein,
S refers to the height of the position that described limit position part can arrange;
S
wrefer to the maximum position height value that can reach of described piston in the time of normal work;
S
vto consider in the described piston pressure loss that high pressure gas leakage causes during in limit position, thereby, need the numerical value of reserve part compression stroke;
S
tbe in view of due to temperature variation, cause pressure drop, thereby need the partial pressure travel values retaining;
S
pin view of lose time thereby the partial pressure travel values retaining due to other factor build-ups of pressure.
5. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 1 and 2, is characterized in that, the inwall of described limit position part and described upper space forms ladder-type structure.
6. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 3, is characterized in that, the inwall of described limit position part and described upper space is formed as one.
7. piston accumulator machinery stop bit formula pressure overload protection structure according to claim 1, is characterized in that, the surface of contact of described piston and described accumulator tank inner surface is provided with sealed member.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103867536A true CN103867536A (en) | 2014-06-18 |
| CN103867536B CN103867536B (en) | 2017-03-01 |
Family
ID=50906429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210533046.0A Active CN103867536B (en) | 2012-12-11 | 2012-12-11 | A kind of piston accumulator machinery stop bit formula pressure overload protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103867536B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141302A (en) * | 1996-11-14 | 1998-05-26 | Otix:Kk | Accumulator |
| 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 |
| US20060204389A1 (en) * | 2003-03-25 | 2006-09-14 | Norbert Weber | Piston-type accumulator |
| 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 |
-
2012
- 2012-12-11 CN CN201210533046.0A patent/CN103867536B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141302A (en) * | 1996-11-14 | 1998-05-26 | Otix:Kk | Accumulator |
| 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 |
| US20060204389A1 (en) * | 2003-03-25 | 2006-09-14 | Norbert Weber | Piston-type accumulator |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103867536B (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102748041B (en) | Nitrogen safety valve for hydraulic support in coal mine fully mechanized mining | |
| CN102889273A (en) | Electro-hydraulic system for recycling and releasing potential energy of engineering machinery | |
| RU2598610C2 (en) | Implement | |
| CN103133435A (en) | Hydraulic energy accumulator | |
| CN104533879A (en) | Pressure stabilization compensation device and energy accumulator detection system with same | |
| CN109698298A (en) | The pressure relief device of battery core | |
| WO2016127777A1 (en) | Nitrogen energy storage hydraulic cylinder | |
| CN203297171U (en) | Constant pressure variable cross-section air cavity and piston hybrid flexible hydraulic accumulator | |
| CN202955297U (en) | Threaded pilot-operated overflow valve | |
| CN104389824A (en) | Leather bag type energy accumulator | |
| CN103867536A (en) | Mechanical stop type pressure overload protection structure of piston accumulator | |
| CN202991711U (en) | Mechanical stop type pressure overload protection structure for piston type energy accumulator | |
| CN103807489B (en) | A kind of gas-liquid linked quick start cylinder | |
| CN103000831B (en) | Anti-explosion device capable of monitoring storage battery | |
| CN102324478B (en) | Battery safety valve and vacuum-pumping and pressure-releasing method thereof | |
| CN204213070U (en) | Composite structure welding accumulator | |
| CN204458643U (en) | The accumulator detection system of stabilizing compensation device and application thereof | |
| CN203570710U (en) | Automatic exhaust oil tank | |
| CN105570204A (en) | Welding energy accumulator with composite structure | |
| CN202611689U (en) | Self-sealing quick pressure monitoring device | |
| CN205330593U (en) | Area is pressed and is traded polished rod well head controller | |
| CN204422315U (en) | A kind of additional locking devices for valve pressure test | |
| CN205349881U (en) | Diaphragm -type energy accumulator | |
| CN103887454A (en) | Lithium ion battery seal structure and its lithium ion battery | |
| CN201377483Y (en) | Overpressure protection device for hydraulic cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |