CN101457755A - Constant flow direction pressure limiting integration apparatus for double acting gear pump - Google Patents
Constant flow direction pressure limiting integration apparatus for double acting gear pump Download PDFInfo
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- CN101457755A CN101457755A CNA2008102370243A CN200810237024A CN101457755A CN 101457755 A CN101457755 A CN 101457755A CN A2008102370243 A CNA2008102370243 A CN A2008102370243A CN 200810237024 A CN200810237024 A CN 200810237024A CN 101457755 A CN101457755 A CN 101457755A
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Abstract
The invention discloses a consistent flow direction pressure limitation integration device for a bidirectional gear pump, comprising a body, wherein, an oil inlet, an oil inlet passage I and an oil inlet passage II are arranged on the body; the oil inlet passage I and the oil inlet passage II are communicated with the oil inlet; the oil inlet passage I is communicated with the oil cavity I of a gear pump by a one way valve I, the oil inlet passage II is communicated with the oil cavity II of the gear pump by a one way valve II, and the one way openings of the one way valve I and the one way valve II face to the oil inlet direction; and by the sliding of the valve core of a slide valve, the oil cavity I or the oil cavity II can be communicated with an oil outlet. The device can be suitable for various types of bidirectional gear pumps, and the change of the gear rotation direction of the gear pump can not influence the flowing direction of actuating media of the inlet and the outlet of the entire system; when exceeding the requirement, the load pressure of the system can be fast controlled by the device; meanwhile, the device has compact structure and convenient usage, and can be widely used.
Description
Technical field
The present invention relates to a kind of gear pump pressure limiting device, particularly a kind of constant flow direction pressure limiting integration apparatus for double acting gear pump.
Background technique
Gear pump is to rely between pumping cylinder and engaging gear formed swept volume to change and move the rotary pump of carrying liquid or making it supercharging.Overall view is domestic and international, and the development of gear pump product can be divided into two stages: the phase I is the mesolow age, and by the end of the end of the sixties, it is big to mainly contain flow pulsation, shortcoming such as internal leakage is big; Second stage from the seventies till now, adopted the advanced technology of floating side plate both at home and abroad and be used fixed lateral plate, solved axial leakage.
For the needs that adapt to sustainable development and protection environment, both at home and abroad all in the research that steps up model utility gear pump product, towards energy-conservation, material-saving, reduction noise, prevent to leak, the direction of miniaturization and multifunction develops.
In general design of Hydraulic System, the selection of gear pump needs clear and definite its rotation direction, motor select for use with wiring on be restricted.Existing double-direction gearpump is when being rotated in the forward with counterrotating, in order to keep hydraulic pressure normal, often take structure as shown in Figure 1, promptly increase exterior line, joint and one group of one-way valve is set and realize at filler opening and oil outlet, but along with the just commentaries on classics or the counter-rotating of gear, the flow direction of the inlet/outlet working medium of pump also will change.In addition, adopt that this constructed products exists that structure is single, flow pulsation is big and double-direction gearpump in be not with shortcoming such as protective arrangement for limiting output voltage, thereby brought inconvenience for the application of gear pump.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of constant flow direction pressure limiting integration apparatus for double acting gear pump, overcome the defective that the conventional construction device is more, the reaction time is long, break down easily, can be applicable in the double-direction gearpump of many kinds, and the inlet/outlet working medium flow direction of the system of assurance remains unchanged.
Constant flow direction pressure limiting integration apparatus for double acting gear pump of the present invention comprises body, oil inlet passage I and oil inlet passage II that described body is provided with filler opening and is connected with filler opening;
Also be provided with on the body and be used for the access passage I that communicates with gear pump one end hydraulic fluid port, described access passage I communicates with oil inlet passage I by one-way valve I, also be provided with on the body and be used for the access passage II that communicates with gear pump the other end hydraulic fluid port, described access passage II communicates with oil inlet passage II by one-way valve II, and unidirectional mouthful of described one-way valve I and one-way valve II towards the oil-feed direction;
Also comprise guiding valve, the fluid inlet opening at described guiding valve two ends communicates with the access passage I and the access passage II of gear pump respectively, the fluid outlet of described guiding valve communicates with oil outlet on being arranged on body, by the slip of spool on valve body of guiding valve, insert passage I and insert passage II and realize and being communicated with of oil outlet in one the mode of selecting.
Further, described one-way valve I and one-way valve II are tapered valve;
Further, also comprise safety valve, described safety valve is arranged on the escape way that connects filler opening and oil outlet;
Further, also comprise inner draining passage, the two ends of described inner draining passage communicate with the leakage oil pocket and the filler opening of institute access gear pump respectively.
The invention has the beneficial effects as follows:
1. can be applicable in the double-direction gearpump of many kinds no matter how the gear pump gear sense of rotation changes, the inlet/outlet working medium flow direction of whole system can remain constant;
Reaction time rapid, response in time surpasses when requiring at system load pressure, can be controlled by this device rapidly, the normal stable operation of protective system;
3. directly be communicated with gear pump by the draining passage is set, the fluid that leaks in pump housing oil sealing chamber and the axle sleeve chamber is introduced filler opening, it is fine lubricated that the axle sleeve endoporus is obtained, and guarantees that the pressure of oil sealing back cavity can be not too high;
4. this device can be integrated in or be installed on the pump housing according to pump structure, and compact structure, can make gear pump have better function, and it is more to have overcome the conventional construction device, and the defective that breaks down easily is simultaneously easy to use, be fit to promote the use of;
5, realize miniaturization, the level of integration height has effectively dwindled volume and has reduced weight, the pump of this device is installed is compared with pump of the same type, and weight reduces 30%～50% at least..
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can realize and obtain by following specification and claims.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is common double-direction gearpump commutating structure schematic representation;
Fig. 2 is a connection diagram of the present invention;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is an application schematic representation of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
As shown in Figures 2 and 3, constant flow direction pressure limiting integration apparatus for double acting gear pump of the present invention, comprise body 1, body 1 is provided with filler opening 2 and oil inlet passage I3 that is connected with filler opening 2 and oil inlet passage II4, oil inlet passage I3 communicates with the access passage I5 of gear pump by one-way valve I31, oil inlet passage II4 communicates with the access passage II6 of gear pump by one-way valve II41, and unidirectional mouthful of one-way valve I31 and one-way valve II41 towards the oil-feed direction; One-way valve I31 and one-way valve II41 are tapered valve.
Also comprise guiding valve 7, the fluid inlet opening at described guiding valve 7 two ends communicates with the access passage I5 and the access passage II6 of gear pump respectively, the fluid outlet of described guiding valve 7 communicates with oil outlet 8 on being arranged on body 1, by the slip of spool on valve body of guiding valve 7, insert passage I5 and insert passage II6 and realize and being communicated with of oil outlet 8 in one the mode of selecting.
For guaranteeing the safe handling of this device, also be provided with safety valve 9 on the body 1, safety valve 9 is arranged on the escape way that connects filler opening 2 and oil outlet 8.
Can be not too high for the pressure that guarantees the oil sealing back cavity, this device also is provided with inner draining path 10, and the two ends of described inner draining path 10 communicate with the leakage oil pocket and the filler opening 2 of institute access gear pump respectively.
The present invention can be provided with corresponding spring to one-way valve and guiding valve according to the working pressure of double-direction gearpump, thereby satisfy the working condition in loop in actual use.
Device of the present invention adopts and the corresponding to material of the pump housing, and the valve core structure of configuration high wear resistance material, thus the working life of intensifier.
The mounting point of double-direction gearpump is represented in A position among Fig. 3, and as shown in Figure 4, the cooperating process of the present invention and double-direction gearpump is as follows:
When the driving gear of double-direction gearpump when a direction is rotated, drive driven gear rotates thereupon, two gears by the process that is engaged to disengagement in, the volume of oil sucting cavity is big from little change, form negative-pressure vacuum, fluid is opened wherein one-way valve I under atmospheric effect, fluid from oil inlet passage I through inserting passage I, be inhaled into the oil sucting cavity of gear pump, this moment, one-way valve II closed under pumping cavity oil liquid pressure and spring action; Then, two gears in the pumping cavity are by disengaging to engagement, and volume forms pressure chamber from large to small, and guiding valve is opened, and fluid is extruded, and oil sucting cavity and pumping cavity are kept apart by two gear meshing points, because the continuous motion of gear has just formed the gear oil drain quantity;
If driving gear is to backward rotation, at this moment, former pumping cavity has become oil sucting cavity, former oil sucting cavity becomes pumping cavity, and fluid is opened one-way valve II, by oil inlet passage II through inserting passage II, enter oil sucting cavity, this moment, one-way valve I closed under pumping cavity oil liquid pressure and spring action, and the pressure oil in the pumping cavity is opened guiding valve, flows out from oil outlet.
Owing to added device of the present invention, can find clearly that no matter double-direction gearpump just changes or reverse, the working medium that enters from system's filler opening 2 all will flow out from oil outlet 8, and whole system is stable, coordinate, and is difficult for fluctuating.
This device has been used on certain conveyance gear pump of my company's production, and the key technical indexes that reaches is as shown in table 1:
Table 1
The technology of the present invention advanced person, reliable, ripe, the noise of inventive embodiments product and target volumetric efficiency all are in advanced international level, and cost is significantly less than external product, can substitute a large amount of at present external import like products that use, and can realize part, modularization on this basis.
Explanation is at last, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technological scheme of the present invention, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. constant flow direction pressure limiting integration apparatus for double acting gear pump, it is characterized in that: comprise body (1), described body (1) is provided with filler opening (2) and oil inlet passage I (3) that is connected with filler opening (2) and oil inlet passage II (4);
Also be provided with on the body and be used for the access passage I (5) that communicates with gear pump one end oil pocket, described access passage I (5) communicates with oil inlet passage I (3) by one-way valve I (31), also be provided with on the body and be used for the access passage II (6) that communicates with gear pump the other end oil pocket, described access passage II (6) communicates with oil inlet passage II (4) by one-way valve II (41), and unidirectional mouthful of described one-way valve I (31) and one-way valve II (41) towards the oil-feed direction;
Also comprise guiding valve (7), the fluid inlet opening at described guiding valve (7) two ends communicates with the access passage I (5) and the access passage II (6) of gear pump respectively, the fluid outlet of described guiding valve (7) communicates with oil outlet (8) on being arranged on body (1), by the slip of spool on valve body of guiding valve (7), insert passage I (5) and access passage II (6) and realize and being communicated with of oil outlet (8) in one the mode of selecting.
2. constant flow direction pressure limiting integration apparatus for double acting gear pump according to claim 1 is characterized in that: described one-way valve I (31) and one-way valve II (41) are tapered valve.
3. constant flow direction pressure limiting integration apparatus for double acting gear pump according to claim 2 is characterized in that: also comprise safety valve (9), described safety valve (9) is arranged on the escape way that connects filler opening (2) and oil outlet (8).
4. constant flow direction pressure limiting integration apparatus for double acting gear pump according to claim 3 is characterized in that: also comprise inner draining passage (10), the two ends of described inner draining passage (10) communicate with the leakage oil pocket and the filler opening (2) of institute access gear pump respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102370243A CN101457755A (en) | 2008-12-31 | 2008-12-31 | Constant flow direction pressure limiting integration apparatus for double acting gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102370243A CN101457755A (en) | 2008-12-31 | 2008-12-31 | Constant flow direction pressure limiting integration apparatus for double acting gear pump |
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| Publication Number | Publication Date |
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| CN101457755A true CN101457755A (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102370243A Pending CN101457755A (en) | 2008-12-31 | 2008-12-31 | Constant flow direction pressure limiting integration apparatus for double acting gear pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322296A (en) * | 2011-08-22 | 2012-01-18 | 石家庄中煤装备制造股份有限公司 | Control valve and positively and negatively rotating motor |
| CN105202349A (en) * | 2015-09-18 | 2015-12-30 | 杭州前进齿轮箱集团股份有限公司 | Conversion device capable of realizing bidirectional operation of unidirectional lubricating pump |
| CN112145411A (en) * | 2020-11-06 | 2020-12-29 | 合肥长源液压股份有限公司 | Constant flow direction bidirectional gear oil pump |
-
2008
- 2008-12-31 CN CNA2008102370243A patent/CN101457755A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322296A (en) * | 2011-08-22 | 2012-01-18 | 石家庄中煤装备制造股份有限公司 | Control valve and positively and negatively rotating motor |
| CN105202349A (en) * | 2015-09-18 | 2015-12-30 | 杭州前进齿轮箱集团股份有限公司 | Conversion device capable of realizing bidirectional operation of unidirectional lubricating pump |
| CN112145411A (en) * | 2020-11-06 | 2020-12-29 | 合肥长源液压股份有限公司 | Constant flow direction bidirectional gear oil pump |
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Open date: 20090617 |