CN101153495A - Pilot-operated type hydraulic impactor - Google Patents
Pilot-operated type hydraulic impactor Download PDFInfo
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- CN101153495A CN101153495A CNA2006101164875A CN200610116487A CN101153495A CN 101153495 A CN101153495 A CN 101153495A CN A2006101164875 A CNA2006101164875 A CN A2006101164875A CN 200610116487 A CN200610116487 A CN 200610116487A CN 101153495 A CN101153495 A CN 101153495A
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- valve
- pilot valve
- pilot
- spring
- reversing
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Abstract
The invention discloses a pilot type hydraulic impactor consisting of a piston 1, a high pressure accumulator 2, a cylinder body 3, a low pressure accumulator 4, a pilot valve hand wheel 5, a pilot valve spring 6, a pilot valve 7, a reversing valve core spring 8, a reversing valve core 10, a reversing valve body 11 and a pilot valve body 12, wherein, the piston 1 is arranged in the cylinder body 3 to form a piston front cavity a1, a piston back cavity a2 and a nitrogen gas chamber a3, the three cavities are separated from each other, the reversing valve core spring 8 and the reversing valve core 10 are arranged in the reversing valve body 11, the pilot valve hand wheel 5, the pilot valve spring 6 and the pilot valve 7 are arranged in the pilot valve body 12, the pilot valve body 12 is directly arranged on the reversing valve body 11 through bolts, and an oil hole in the reversing valve body 11 is communicated with an oil hole in the cylinder body 3. The operating principle shows that: a driver adjusts the cracking pressure of the pilot valve 7 through rotating the pilot valve hand wheel 5, thereby realizing steples control on system pressure and accordingly stepless adjustment of the impact energy of the impactor; when the system pressure is high, the impact energy is great; when the system pressure is low, the impact energy is little.
Description
One, technical field
The present invention relates to a kind of pilot-operated type hydraulic impactor.Adopt the hydraulic impactor of the present invention's design, the impact energy that can regulate hydraulic impactor by the set pressure of regulating the pilot-operated type flat valve can improve its technical performance, raises the efficiency and enlarges its scope of application.
Two, background technology
Make a general survey of the developing history of hydraulic impactor, three have obtained very great progress during the last ten years.But from structural principle, basic not variation is leveraged to the present always.At present both at home and abroad the hydraulic impactor that uses is all the travel feedback formula, and when promptly backward stroke of the piston arrived feedback hole on the cylinder body, hydraulic oil made the valve commutation, and piston transfers stroke to.The travel feedback operating principle of hydraulic impactor has determined its technical characteristic, can not realize according to the difference of being impacted the object performance, the function of the impact energy of step-less adjustment hydraulic impactor.Therefore, designing a kind of new operating principle is pressing for of hydraulic impactor technical development.
Three, summary of the invention
The objective of the invention is to break through the working method of the traditional travel feedback control principle of hydraulic impactor, break the continuous action relation of Pd and Qd, realize the step-less adjustment control of hydraulic impactor system works pressure.Thereby reach the difference of following, come the purpose of function of the impact energy of step-less adjustment hydraulic impactor by the set pressure of regulating pilot valve according to being impacted the object performance.
Fig. 1 is the structural representation of backhaul initial state of the present invention; Fig. 2 is the structural representation of stroke initial state of the present invention.
Now in conjunction with the accompanying drawings the technology of the present invention content is done an explanation: the pilot-operated type hydraulic impactor course of work is to be realized by the backhaul of piston and stroke.
(1) backhaul (piston 1 and change-over valve core 10 original positions are as shown in Figure 1)
The initial position of reversing valve core 10 is to be in position, a left side under the effect of reversal valve spring force, and this moment, hydraulic oil entered the ante-chamber a1 of piston, and the back cavity a2 of piston 1 is by the reversal valve oil sump tank; Under the effect of piston 1 front and back chamber pressure reduction and high pressure accumulator 2 oil extractions, backhaul is carried out in piston 1 compressed nitrogen air chamber a3 accelerated motion left, system works pressure raises, when system pressure raises greater than pilot valve set pressure (this pressure rotates pilot valve handwheel 5 visual operating modes by the driver and sets up), pilot valve 7 is opened, hydraulic oil is by reversal valve center damping hole 9, flows back to fuel tank through the reversal valve damping hole 9 of guide's flat valve.This moment is because hydraulic oil process reversal valve center damping hole 9, make reversing valve core 10 two ends produce pressure reduction, and reversing valve core 10 two ends effective active areas equate, the active force to the right that produces when pressure reduction is during greater than the spring force of reversal valve, the reversal valve commutation, make reversing valve core 10 be in right position, impactor changes stroke over to.
(2) stroke (piston 1 and change-over valve core 10 original positions are as shown in Figure 2)
After reversing valve core 10 is in right position, all logical hydraulic oil in chamber, piston 1 front and back, because piston ante-chamber a1 effective active area is less than back cavity a2 effective active area, piston 1 stops up under the acting in conjunction that the nitrogen of a3 expands at chamber, front and back pressure reduction and nitrogen, carries out stroke movement to the right.Stroke quickens after-stage, and system pressure reduces, and when system pressure reduces after less than pilot valve 7 set pressures, pilot valve 7 is closed.Under the effect of reversal valve spring force, reversing valve core 10 resets.Meanwhile, piston 1 impacts the cutter bar, and stroke finishes.System is in state as shown in Figure 1 again, and oil pump continues fuel feeding, restarts next circulation drawback movement.
Can find out that by above-mentioned operating principle the opening pressure that operating personnel regulate pilot valve 7 by rotation pilot valve handwheel 5 can stepless control system pressure, thus the impact energy of step-less adjustment impactor, the system pressure height, impact energy is big; System pressure is low, impacts little.
Four, description of drawings
Pilot-operated type hydraulic impactor is mainly by piston 1, high pressure accumulator 2, cylinder body 3, low pressure accumulator 4, pilot valve handwheel 5, pilot valve spring 6, pilot valve 7, reversing valve core spring 8, reversing valve core 10, change valve 11 and pilot valve body 12 form. A1 represents the piston ante-chamber, A2 represents the piston back cavity, and a3 represents nitrogen chamber, and a4 represents that ante-chamber, a5, a6, the a7 of reversal valve represent 3 lumens of reversal valve, and a8 represents The back cavity of reversal valve and pilot valve ante-chamber, a9 represents the pilot valve back cavity, 9 expression reversal valve damping holes.
Five, the specific embodiment
Piston 1 is contained in and forms piston ante-chamber a1, piston back cavity a2 and nitrogen chamber a3 in the cylinder body 3, isolates mutually between these three chambeies.Reversing valve core spring 8 and reversing valve core 10 are installed in the change valve 11, and pilot valve handwheel 5, pilot valve spring 6 and pilot valve 7 are contained in the pilot valve body 12.Pilot valve body 12 is directly installed on the change valve 11 by bolt.Oilhole on the change valve 11 is communicated with cylinder body 3 oilholes by oil pipe.Reversing valve core 10 and reversing valve core spring 8 are assemblied in the change valve 11, form ante-chamber a4,3 lumens (a5, a6, a7) and the back cavity a8 of reversal valve.On pilot valve handwheel 5, pilot valve spring 6 and the pilot valve 7 assembling pilot valve bodies 12, form the ante-chamber a8 and the back cavity a9 of reversal valve pilot valve 7.The ante-chamber of pilot valve 7 directly is communicated with the back cavity of reversal valve, and the back cavity a9 of pilot valve 7 directly is communicated with the lumen a7 of reversal valve.
Claims (3)
1. pilot-operated type hydraulic impactor, form by piston 1, high pressure accumulator 2, cylinder body 3, low pressure accumulator 4, pilot valve handwheel 5, pilot valve spring 6, pilot valve 7, reversing valve core spring 8, reversing valve core 10, change valve 11 and pilot valve body 12, it is characterized in that: piston 1 is contained in and forms piston ante-chamber a1, piston back cavity a2 and nitrogen chamber a3 in the cylinder body 3, isolates mutually between these three chambeies.Reversing valve core spring 8 and reversing valve core 10 are installed in the change valve 11, and pilot valve handwheel 5, pilot valve spring 6 and pilot valve 7 are contained in the pilot valve body 12.Pilot valve body 12 is directly installed on the change valve 11 by bolt.Oilhole on the change valve 11 is communicated with cylinder body 3 oilholes by oil pipe.
2. according to the pilot-operated type hydraulic impactor of claim 1, it is characterized in that: reversing valve core 10 and reversing valve core spring 8 are assemblied in the change valve 11, form ante-chamber a4,3 lumens (a5, a6, a7) and the back cavity a8 of reversal valve.On pilot valve handwheel 5, pilot valve spring 6 and the pilot valve 7 assembling pilot valve bodies 12, form the ante-chamber a8 and the back cavity a9 of reversal valve pilot valve 7.The ante-chamber of pilot valve 7 directly is communicated with the back cavity of reversal valve, and the back cavity a9 of pilot valve 7 is communicated with the lumen a7 of reversal valve, directly fuel tank.
3. according to the pilot-operated type hydraulic impactor of claim 1, it is characterized in that: the pressure differential that spring force that the action of reversing valve core 10 is produced by reversing valve core spring 8 and hydraulic oil flow produce through reversal valve damping hole 9 interacts and realizes.Spring force that the action of pilot valve 7 is produced by pilot valve spring 6 and system pressure interact and realize that the pilot valve spring force is determined by rotation pilot valve handwheel by operating personnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101164875A CN101153495A (en) | 2006-09-26 | 2006-09-26 | Pilot-operated type hydraulic impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101164875A CN101153495A (en) | 2006-09-26 | 2006-09-26 | Pilot-operated type hydraulic impactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101153495A true CN101153495A (en) | 2008-04-02 |
Family
ID=39255357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101164875A Pending CN101153495A (en) | 2006-09-26 | 2006-09-26 | Pilot-operated type hydraulic impactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101153495A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167152A (en) * | 2017-11-22 | 2018-06-15 | 上海齐耀动力技术有限公司 | A kind of hydraulic-driven reciprocating pump |
| CN110945206A (en) * | 2017-07-20 | 2020-03-31 | 敏康国际有限公司 | Valve guide structure for hydraulic impact device |
-
2006
- 2006-09-26 CN CNA2006101164875A patent/CN101153495A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945206A (en) * | 2017-07-20 | 2020-03-31 | 敏康国际有限公司 | Valve guide structure for hydraulic impact device |
| CN108167152A (en) * | 2017-11-22 | 2018-06-15 | 上海齐耀动力技术有限公司 | A kind of hydraulic-driven reciprocating pump |
| CN108167152B (en) * | 2017-11-22 | 2021-08-24 | 上海齐耀动力技术有限公司 | Hydraulic drive reciprocating pump |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080402 |