CN103244507A - Piston air chamber buffer controlled-release cavity arranged on cylinder piston rod - Google Patents
Piston air chamber buffer controlled-release cavity arranged on cylinder piston rod Download PDFInfo
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- CN103244507A CN103244507A CN 201310146517 CN201310146517A CN103244507A CN 103244507 A CN103244507 A CN 103244507A CN 201310146517 CN201310146517 CN 201310146517 CN 201310146517 A CN201310146517 A CN 201310146517A CN 103244507 A CN103244507 A CN 103244507A
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Abstract
Disclosed is a piston air chamber buffer controlled-release cavity arranged on a cylinder piston rod. The cavity structurally comprises a cylinder body 1, a blind nut 2, a cylinder piston 3, a small piston 4, an inflating one-way valve 5, the piston rod 6 and a one-way throttle valve 7 and is characterized in that a stepped blind hole is arranged at the left end of the piston rod 6, the large part of the blind hole is a inner threaded hole, the small piston 4 is mounted in the small blind hole part to form a matching pair, the matching pair is provided with a seal part to allow the small piston 4 and the small blind hole part to form an enclosed cavity, inert gas is fed into the enclosed cavity through the inflating one-way valve 5, the left end of the small piston 4 is communicated with a rodless cavity of a cylinder through the one-way throttle valve 7 on the blind nut 2, and equivalently, an accumulator is disposed on the piston rod 6. During starting of the cylinder, redundant flow pushes the small piston 4 to distribute part of flow so as to relieve start impact, when impact pressure lowers, the redundant flow flows back to the rodless cavity gradually, flow is saved, and backflow impact is prevented.
Description
One, technical field:
The present invention relates to a kind of piston air chamber buffering slowly-releasing cavity volume that is arranged on the oil cylinder piston bar.
Two, background technique:
Along with China's industrial expansion, hydraulic transmission has been widely used on all kinds of heavy machinery equipments with control.
Hydraulic jack is topmost executive component in the Hydraulic Power Transmission System.Its performance has played very big effect to the performance of main frame.
Along with hydraulics today towards the development of high-pressure trend and speed up, the startup impact of hydraulic jack and reversing impact have brought very big hydraulic shock to main frame, have caused vibrations and the noise of main frame, very easily cause the early stage damage of hydraulic-pressure pump.Hydraulic shock causes the unnecessary consumption of energy, makes the rapid intensification of host hydraulic system, and then has reduced the viscosity of hydraulic work system medium, and the volumetric efficiency of system descends.
Producing this impact has its reason of being with the starting of load high-acceleration and commutation, and the reason of each equipment cooperation of main frame is arranged, and also has the reason that each major control element rationally mates in its dynamic response transient process in the hydraulic system.At these reasons, people have carried out a large amount of research and discussion, yet these and host work character are inherent, make that people want to take effect very little by the effort that this impact and energy consumption are improved or alleviated to more rational coupling.
At present, on all kinds of high-end hydraulic equipments, the smooth starting of hydraulic jack and energy-conservation buffering are one of difficult problems of puzzlement industry.
Three, summary of the invention:
Purpose of the present invention will be developed a kind of excellent performance exactly, and technology is reliable, the smooth starting of the hydraulic jack of energy-saving and noise-reducing and the new structure of energy-conservation buffering.
The present invention is a kind of piston air chamber buffering slowly-releasing cavity volume that is arranged on the oil cylinder piston bar, and its structure is combined by cylinder barrel 1, blind nut 2, oil cylinder piston 3, small piston 4, inflation one-way valve 5, piston rod 6 and one-way throttle valve 7; It is characterized in that: the left end at piston rod 6 is provided with a ladder blind hole, and big is interior threaded hole; Small piston 4 is contained in the small blind hole, and the axial position of small piston 4 is by blind nut 1 location, and small piston 4 is paid for cooperating with small blind hole, and is provided with Sealing, makes small piston 4 and small blind hole form an airtight cavity volume; Can charge into inert gas to this airtight cavity volume by inflation one-way valve 5; Charge into a little higher than oil cylinder working pressure of pressure of inert gas, the left end of small piston 4 is connected with the rodless cavity of oil cylinder by the one-way throttle valve 7 on the blind nut 1; So just be equivalent to be provided with a piston air chamber accumulator at piston rod 6.
The present invention is in the start-up course of oil cylinder, the speed of oil cylinder is by static speedup, unnecessary flow will inevitably make the pressure in the oil cylinder rodless cavity press rising rapidly, be higher than the pressure that charges into inert gas when its pressure, will promote small piston 4 further compressions and charge into inert gas, enter the cavity volume between small piston 4 and the blind nut 1, shunted segment fluid flow, the starting of alleviating oil cylinder is impacted; And when the surge pressure in the oil cylinder rodless cavity reduces along with the speed of oil cylinder increases, the former fluid that enters small piston 4 left end cavity volumes can progressively flow back to rodless cavity under the effect of compressed inert gas, force the pressure oil that will be overflowed from relief valve originally to do work again, save energy, and prevented flow-reversing impingement.
This structure is especially for long-armed equipment of concrete mixer class, at work because the former fixed position of the protection of the dynamic load of the jib support hydraulic pressure oil cylinder that jib elasticity causes and maintenance jib is to have very much
Effect.
Four, description of drawings:
Accompanying drawing 1 is structure principle chart of the present invention.
Five, embodiment:
The specific embodiment of the present invention is: in the start-up course of oil cylinder, the speed of oil cylinder is by static speedup, unnecessary flow will inevitably make the pressure in the oil cylinder rodless cavity press rising rapidly, be higher than the pressure that charges into inert gas when its pressure, will promote small piston 4 further compressions and charge into inert gas, enter the cavity volume between small piston 4 and the blind nut 1, shunted segment fluid flow, the starting of alleviating oil cylinder is impacted; And when the surge pressure in the oil cylinder rodless cavity reduces along with the speed of oil cylinder increases, the former fluid that enters small piston 4 left end cavity volumes can progressively flow back to rodless cavity under the effect of compressed inert gas, force the pressure oil that will be overflowed from relief valve originally to do work again, save energy, and prevented the reflow stream impact.
Claims (1)
1. a piston air chamber that is arranged on the oil cylinder piston bar cushions the slowly-releasing cavity volume, and its structure is combined by cylinder barrel (1), blind nut (2), oil cylinder piston (3), small piston (4), inflation one-way valve (5), piston rod (6) and one-way throttle valve (7); It is characterized in that: the left end at piston rod (6) is provided with a ladder blind hole, and big is interior threaded hole; Small piston (4) is contained in the small blind hole, and the axial position of small piston (4) is by blind nut (1) location, and small piston (4) is paid for cooperating with small blind hole, and is provided with Sealing, makes small piston (4) and small blind hole form an airtight cavity volume; Charge into inert gas by inflation one-way valve (5) to this airtight cavity volume; Charge into a little higher than oil cylinder working pressure of pressure of inert gas, the left end of small piston (4) is connected with the rodless cavity of oil cylinder by the one-way throttle valve (7) on the blind nut (1); So just be equivalent to be provided with a piston air chamber accumulator at piston rod (6); In the start-up course of oil cylinder, the speed of oil cylinder is by static speedup, unnecessary flow will inevitably make the pressure in the oil cylinder rodless cavity press rising rapidly, be higher than the pressure that charges into inert gas when its pressure, will promote the further compression of small piston (4) and charge into inert gas, enter the cavity volume between small piston (4) and the blind nut (1), shunted segment fluid flow, the starting of alleviating oil cylinder is impacted; And when the surge pressure in the oil cylinder rodless cavity reduces along with the speed of oil cylinder increases, the former fluid that enters small piston (4) left end cavity volume can progressively flow back to rodless cavity under the effect of compressed inert gas, force the pressure oil that will be overflowed from relief valve originally to do work again, save energy, and prevented flow-reversing impingement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310146517 CN103244507A (en) | 2013-04-25 | 2013-04-25 | Piston air chamber buffer controlled-release cavity arranged on cylinder piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310146517 CN103244507A (en) | 2013-04-25 | 2013-04-25 | Piston air chamber buffer controlled-release cavity arranged on cylinder piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103244507A true CN103244507A (en) | 2013-08-14 |
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ID=48924268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310146517 Pending CN103244507A (en) | 2013-04-25 | 2013-04-25 | Piston air chamber buffer controlled-release cavity arranged on cylinder piston rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN103244507A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697449A (en) * | 2016-04-26 | 2016-06-22 | 苏州普来可瑞机电技术有限公司 | Mechanical design method and structure of double-acting energy-saving cylinder |
| CN105822762A (en) * | 2016-05-18 | 2016-08-03 | 镇江市隆盛工具有限公司 | Piston rod |
| CN107649680A (en) * | 2017-09-18 | 2018-02-02 | 南京东部精密机械有限公司 | Function aggregation system is rushed in numerical control mechanical electronic hydraulic combination drive servo powder forming pump control |
| CN108317127A (en) * | 2018-04-11 | 2018-07-24 | 合肥长源液压股份有限公司 | Novel energy-storage hydraulic cylinder |
-
2013
- 2013-04-25 CN CN 201310146517 patent/CN103244507A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697449A (en) * | 2016-04-26 | 2016-06-22 | 苏州普来可瑞机电技术有限公司 | Mechanical design method and structure of double-acting energy-saving cylinder |
| CN105822762A (en) * | 2016-05-18 | 2016-08-03 | 镇江市隆盛工具有限公司 | Piston rod |
| CN107649680A (en) * | 2017-09-18 | 2018-02-02 | 南京东部精密机械有限公司 | Function aggregation system is rushed in numerical control mechanical electronic hydraulic combination drive servo powder forming pump control |
| CN108317127A (en) * | 2018-04-11 | 2018-07-24 | 合肥长源液压股份有限公司 | Novel energy-storage hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130814 |