CN203394921U - Plunger hydraulic cylinder - Google Patents
Plunger hydraulic cylinder Download PDFInfo
- Publication number
- CN203394921U CN203394921U CN201320394800.7U CN201320394800U CN203394921U CN 203394921 U CN203394921 U CN 203394921U CN 201320394800 U CN201320394800 U CN 201320394800U CN 203394921 U CN203394921 U CN 203394921U
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- China
- Prior art keywords
- plunger
- cylinder body
- cylinder
- hydraulic
- afterbody
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- Expired - Fee Related
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Abstract
The utility model discloses a plunger hydraulic cylinder which is an executing element applied to a hydraulic system in engineering machinery, metallurgical machinery and mining machinery. Guide rings are arranged at the tail end of a plunger and at the inner side of a seal end cover of a cylinder body, so that a piston rod bears an axial force and a certain radial force during the running process; the plunger cylinder cannot be eccentric due to the radial force in the running process; the service lives of sealing pieces and the guide rings are prolonged; the service life of the plunger cylinder is greatly prolonged; a throttle valve and a one-way valve are arranged at the tail of the cylinder body; the hydraulic impact of the returning of the plunger is reduced by adjusting flow; when an inlet/outlet oil nozzle is blocked, an orifice of the throttle valve is capable of returning the piston rod of the plunger cylinder; a concave buffering groove is arranged in the tail of the plunger, and the tail end of the cylinder body is convex, so that a buffering sealing cavity is formed when the plunger returns, and the hydraulic impact of the hydraulic cylinder is further reduced; the plunger hydraulic cylinder has the advantages that the operation is stable, the return impact is small, and the structure is compact.
Description
Technical field
The utility model belongs to hydraulic component, is specifically related to a kind of plunger piston fluid pressure cylinder of compact structure.
Background technique
In current most plunger case, do not set up damping device, plunger return is stressed excessively causes hydraulic shock large.Even if added buffering, at cylinder bottom, do not adopt fixed restriction yet, with variable restrictor, combine, if once settable orifice is blocked, plunger case is difficult to return.When existing plunger moves in plunger case cylinder body simultaneously, plunger is difficult to coaxially with cylinder body, and during plunger case operation, noise is large, and plunger case, because being subject to radial force, there will be catching phenomenon, and the life-span of plunger case is shortened greatly.
Model utility content
Technical purpose of the present utility model is to provide a kind of plunger piston fluid pressure cylinder steady, that return impacts little and compact structure that moves.
The utility model adopts following technological scheme to realize: a kind of plunger piston fluid pressure cylinder of compact structure, comprise cylinder body 5, be inserted into plunger 1 and end cover 3 in cylinder body, described end cover 3 is connected with cylinder body 5, inner side is provided with seal ring 2 and contacts with plunger 1, described cylinder body 5 afterbodys are provided with four-way oilhole 8, an one hydraulic fluid port is communicated with cylinder body 5 inside, and other three hydraulic fluid ports are positioned at cylinder body outside, is connected with respectively turnover oil nozzle 7, one-way valve 9 and throttle valve 10.
The afterbody of described plunger 1 is provided with dashpot 11, and the afterbody of cylinder body 5 is provided with the buffering projection of mating with dashpot.
The buffering projection bottom of described cylinder body 5 bottoms is provided with fixed orifice 14 and is communicated with described four-way oilhole 8.
Described end cover 3 inner sides are provided with the end cap guide ring 4 contacting with plunger 1, and being radially provided with in appearance on 6, two guide rings of plunger guide ring that contact with the interior table of cylinder body 5 of described plunger 1 afterbody is equipped with guide ring seal ring 13.
At plunger 1 afterbody, be provided with the connection oilhole 12 of the hydraulic oil liquid that is communicated with plunger guide ring 6 both sides.
Described one-way valve 9 and throttle valve 10 are set directly at cylinder body 5 afterbodys for plug-in one-way valve and cartridge throttle valve.
The plunger tail end of plunger piston fluid pressure cylinder of the present utility model and the end cover of cylinder body inner side are provided with guide ring, piston rod can bear axial force in running like this, can bear certain radial force again, can be because not being subject to radial force eccentric in plunger case running, Sealing, guide ring life, the plunger case life-span also can extend greatly.Afterbody at cylinder body arranges throttle valve and one-way valve, reduces the hydraulic shock of plunger return by adjust flux.In plunger tail, recessed dashpot is set, cylinder body tail end protrudes, thereby when plunger return, forms buffering enclosed cavity, further reduces the hydraulic shock of oil hydraulic cylinder, the buffering projection bottom of cylinder bottom is provided with elongated hole as fixed orifice, can, when plunger return forms buffering enclosed cavity, the fluid of enclosed cavity be discharged, simultaneously the throttling of existing variable throttle valve, there is again the throttling of fixed orifice, prevent just in case variable throttle valve, while blocking, fixed restriction still can allow plunger case return.
From the above mentioned, steadily, return impacts little in the utility model motion, and compact structure, can be widely used in engineering machinery, metallurgical machinery, mining machinery.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is the main sectional view of the plunger piston fluid pressure cylinder that relates to of the utility model.
Fig. 2 is the plan view (broken section) of Fig. 1.
Fig. 3 is the structural representation of cylinder base.
Fig. 4 is piston structure schematic diagram.
Fig. 5 is the hydraulic diagram of the plunger piston fluid pressure cylinder that relates to of the utility model.
Number in the figure: 1-plunger, 2-seal ring, 3-end cover, 4-end cap guide ring, 5-cylinder body, 6-plunger guide ring, 7-passes in and out oil nozzle, 8-four-way oilhole, 9-one-way valve, 10-throttle valve, 11-dashpot, 12-is communicated with oilhole, 13-guide ring seal ring, 14-fixed orifice.
Embodiment
Embodiment
Referring to Fig. 1 to Fig. 4, plunger piston fluid pressure cylinder in diagram comprises cylinder body 5, is inserted into plunger 1 and end cover 3 in cylinder body, end cover 3 is connected with cylinder body 5, inner side is provided with seal ring 2 and contacts with plunger 1, cylinder body 5 afterbodys are provided with four-way oilhole 8, an one hydraulic fluid port is communicated with cylinder body 5 inside, and other three hydraulic fluid ports are positioned at cylinder body outside, is connected with respectively turnover oil nozzle 7, one-way valve 9 and throttle valve 10.
Afterbody at plunger 1 is provided with dashpot 11, the afterbody of cylinder body 5 is provided with the buffering projection of mating with dashpot, the buffering projection bottom of cylinder body 5 bottoms is provided with fixed orifice 14 and is communicated with four-way oilhole 8, in buffering projection, enter after dashpot, the fluid of cylinder interior flows into four-way oilhole by fixed orifice 14 and discharges.
In conjunction with referring to Fig. 5, cylinder bottom adopts plug-in one-way valve and throttle valve, has both guaranteed that hydraulic cylinder structure was compact, can adopt again the one-way valve of standard, throttle valve, and highly versatile, guarantees good cushioning effect.When throttle valve is blocked, hydraulic cushion when fixed orifice can be realized the plunger return of plunger piston fluid pressure cylinder equally.
When turnover oil nozzle enters pressure oil, plunger advances under pressure oil effect, plunger is provided with guide ring, plunger guide ring is pasting inboard wall of cylinder block all the time, can guarantee that like this plunger is with the coaxality of cylinder body, after plunger advancement puts in place, under the effect of external force, promote plunger rollback, plunger guide ring is still pasting inboard wall of cylinder block all the time, guarantee plunger with cylinder body in the same horizontal line, when plunger retreats into after certain position, the projection of cylinder body afterbody enters the dashpot of plunger tail end and realizes hydraulic cushion, like this plunger case return very stably just.Dashpot takes full advantage of the feature that plunger diameter is large, can there is larger buffering sectional area, in identical buffer length situation, can obtain larger surge volume, thereby obtain better cushioning effect, and dashpot is located in plunger, can also makes the compact structure of hydraulic rod, in identical stroke situation, the mounting distance of plunger piston fluid pressure cylinder is shorter.
Aft mounted connection oilhole at plunger guarantees that plunger plunger in running can communicate with turnover oil nozzle all the time with the oil between inboard wall of cylinder block.
Claims (6)
1. a plunger piston fluid pressure cylinder, comprise cylinder body (5), be inserted into plunger (1) and end cover (3) in cylinder body, described end cover (3) is connected with cylinder body (5), inner side is provided with seal ring (2) and contacts with plunger (1), it is characterized in that: described cylinder body (5) afterbody is provided with four-way oilhole (8), an one hydraulic fluid port is communicated with cylinder body (5) inside, and other three hydraulic fluid ports are positioned at cylinder body outside, is connected with respectively turnover oil nozzle (7), one-way valve (9) and throttle valve (10).
2. a kind of plunger piston fluid pressure cylinder according to claim 1, is characterized in that: the afterbody of described plunger (1) is provided with dashpot (11), and the afterbody of cylinder body (5) is provided with the buffering projection of mating with dashpot.
3. a kind of plunger piston fluid pressure cylinder according to claim 2, is characterized in that: the buffering projection bottom of described cylinder body (5) bottom is provided with fixed orifice (14) and is communicated with described four-way oilhole (8).
4. according to a kind of plunger piston fluid pressure cylinder described in any one in claim 1-3, it is characterized in that: described end cover (3) inner side is provided with the end cap guide ring (4) contacting with plunger (1), radially being provided with in appearance and the plunger guide ring (6) of showing in cylinder body (5) to contact of described plunger (1) afterbody, is equipped with guide ring seal ring (13) on two guide rings.
5. a kind of plunger piston fluid pressure cylinder according to claim 4, is characterized in that: plunger (1) afterbody is provided with the connection oilhole (12) of the hydraulic oil liquid that is communicated with plunger guide ring (6) both sides.
6. a kind of plunger piston fluid pressure cylinder according to claim 1, is characterized in that: described one-way valve (9) and throttle valve (10) are set directly at cylinder body (5) afterbody for plug-in one-way valve and cartridge throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394800.7U CN203394921U (en) | 2013-07-03 | 2013-07-03 | Plunger hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394800.7U CN203394921U (en) | 2013-07-03 | 2013-07-03 | Plunger hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394921U true CN203394921U (en) | 2014-01-15 |
Family
ID=49906456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320394800.7U Expired - Fee Related CN203394921U (en) | 2013-07-03 | 2013-07-03 | Plunger hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203394921U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422547A (en) * | 2015-12-24 | 2016-03-23 | 宁海佰成机械有限公司 | Piston-free oil cylinder |
| CN107152397A (en) * | 2017-05-19 | 2017-09-12 | 北汽福田汽车股份有限公司 | Put valve oil cylinder, hydraulic system of pump and pumping equipment with it |
| CN109630497A (en) * | 2018-11-30 | 2019-04-16 | 湖南协力液压有限公司 | A kind of preload sealing fluid cylinder pressure |
| CN110017312A (en) * | 2019-04-24 | 2019-07-16 | 安徽合力股份有限公司 | A kind of lift oil tank with buffer structure |
-
2013
- 2013-07-03 CN CN201320394800.7U patent/CN203394921U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422547A (en) * | 2015-12-24 | 2016-03-23 | 宁海佰成机械有限公司 | Piston-free oil cylinder |
| CN107152397A (en) * | 2017-05-19 | 2017-09-12 | 北汽福田汽车股份有限公司 | Put valve oil cylinder, hydraulic system of pump and pumping equipment with it |
| CN109630497A (en) * | 2018-11-30 | 2019-04-16 | 湖南协力液压有限公司 | A kind of preload sealing fluid cylinder pressure |
| CN110017312A (en) * | 2019-04-24 | 2019-07-16 | 安徽合力股份有限公司 | A kind of lift oil tank with buffer structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20170703 |