CN1544813A - Bubble evolution proof plunger pump port plate - Google Patents
Bubble evolution proof plunger pump port plate Download PDFInfo
- Publication number
- CN1544813A CN1544813A CNA2003101086694A CN200310108669A CN1544813A CN 1544813 A CN1544813 A CN 1544813A CN A2003101086694 A CNA2003101086694 A CN A2003101086694A CN 200310108669 A CN200310108669 A CN 200310108669A CN 1544813 A CN1544813 A CN 1544813A
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- China
- Prior art keywords
- damping slot
- pressure
- thrust plate
- bubble
- high pressure
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Abstract
The invention discloses a bubble evolution preventing flow-distributing disc of trunk piston pump, a damping groove on the low-pressure side of the disc is combined of the first and second section damping grooves, etc, the central angles of these damping grooves are equal to the included angle between the central line of the waist hole on the cylinder and the linkage line of the top and bottom dead points on the disc. The secondary throttling structure constructed on the low-pressure damping groove can prevent the bubble evolution when the trunk piston are interlinked with the low-pressure oil tank; when the trunk piston extends outward and absorbs oil, because of large area of the combined damping groove, the resistance loss is very small and avoiding the possibility of gas cavity occurrence. Therefore, the bubbles in the oil absorbing tank and trunk piston cavity are largely reduced, and the gas-cavity noise in high pressure region and flow pulsation of the pump are largely reduced. It inhibits the bubble evolution by increasing pressure of high-speed separation points, sets a sectioned, equal-section damping groove and can remarkably reduce noise of the trunk piston pump and heighten flow quality.
Description
Affiliated technical field
The present invention relates to a kind of thrust plate, relate in particular to the plunger pump thrust plate that a kind of anti-bubble is separated out.
Background technique
The noise of plunger pump, the main cause of vibration compression shock, flow that to be plunger cavity occur in the high and low pressure oil groove of thrust plate switches pour in down a chimney, air pocket etc.The work of the noise of plunger pump reduction for a long time concentrates on following three aspects: the one, improve thrust plate damping slot structure, and reduce compression shock, make plunger cavity transition stably from low pressure to the high pressure to reduce pressure peak; The 2nd, improve oil absorbency, reduce the oil suction resistance, air pocket appears when avoiding oil suction; The 3rd, reduce the crossing release of plunger active chamber dead volume and the air pocket that occurs, the domestic people of having has proposed a kind of improvement project of thrust plate, analysis points out that the plunger active chamber may become the main noise reason because of the air pocket vibration noise that the mistake release occurs, asymmetric arrangement by high low pressure oil groove on the thrust plate prevents the release of crossing of plunger active chamber, and his research paper report adopts new thrust plate to reduce because the air pocket vibration noise that the mistake release of plunger active chamber occurs.
Summary of the invention
Because air pocket appears at the moment of plunger cavity and low-pressure tank connection easily, owing to flow at high speed, fluid separates with wall and low pressure area occurs, very easily separates out at this regional bubble in damping slot.The purpose of this invention is to provide the plunger pump thrust plate that a kind of anti-bubble is separated out, be in thrust plate oil suction groove side, be provided with and have the prismatic damping slot structure of segmentation, when plunger cavity broke away from high-pressure trough, plunger cavity and low voltage side damping slot were connected, and continue to be compressed in a small angle inner plunger chamber, the fluid of discharging enters the oil suction groove through damping slot uniform section section, the damping slot of uniform section section can improve the pressure of point of flow separation as local resistance, prevents that bubble from separating out; In the overhanging oil suction of the plunger stage, it is big that the uniform section area of damping slot becomes, and plunger cavity oil suction resistance is very little, guarantees that oil suction is unobstructed.
Since the plunger active chamber with thrust plate on the moment pressure reduction connected of low-pressure tank bigger, the low pressure area that a fluid stream breaks away from wall, pressure drop can appear in damping slot, and separating out of bubble can appear rapidly in this low pressure area, because plunger pump oil suction groove pressure very low (about 0.16bar), the bubble of separating out can be grown up, can not vanished, and can not form Cavitation Noise in oil suction groove zone.Yet along with the oil-absorbing process of plunger cavity at the oil suction groove, these bubbles are inhaled into plunger cavity with fluid, along with cylinder body rotates to the zone of high pressure, plunger cavity and high pressure oil groove are connected, and fluid pours in down a chimney and enters plunger cavity, bubble in the plunger cavity is sharply crumbled and fall, cause Cavitation Noise, vibration, because vanishing of air pocket poured in down a chimney flow and increased, the pulsation of aggravation plunger pump output flow, thus cause that delivery quality degenerates.
The technical solution used in the present invention is: comprise that having high pressure oil groove, cross section is the thrust plate that triangle flaring high pressure side damping slot, oil suction groove, low voltage side damping slot are formed.Wherein the low voltage side damping slot is to be combined by the first uniform section damping slot and the second uniform section damping slot, and the central angle of the first uniform section damping slot equals on the cylinder body angle of lower dead centre line on the waist shaped hole center line and thrust plate.
The useful effect that the present invention has is: constructed the two-step throttle structure on the low pressure damping slot, can prevent that the bubble of appearance was separated out when plunger active chamber and low-pressure tank from connecting; When the overhanging oil suction of plunger, because the damping slot area of passage of composite structure is big, drag losses is very little, has also avoided because the possibility of air pocket does not freely appear in oil suction.Therefore the bubble in oil suction groove and plunger cavity greatly reduces, and the Cavitation Noise that pump occurs in the zone of high pressure and the flow pulsation of pump greatly reduce.
Description of drawings
Fig. 1 is a port plate structure principle schematic of the present invention;
Fig. 2 is that the A-A of Fig. 1 analyses and observe partial enlarged drawing;
Fig. 3 is the local enlarged diagram of the G of Fig. 2.
Among the figure: 1. thrust plate, 2. high pressure oil groove, 3. high pressure side damping slot, the 4. kidney slot on the cylinder body, 5. oil suction groove, 6. first damping slot, 7. second damping slot, the 8. kidney slot on the cylinder body, 9. plunger, 10. cylinder body, 11. low voltage side damping slots, 12. plunger cavities.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes and having high pressure oil groove 2, cross section is the thrust plate 1 that triangle flaring high pressure side damping slot 3, oil suction groove 5, low voltage side damping slot 11 are formed; Wherein low voltage side damping slot 11 is to be combined by the first uniform section damping slot 7 and the second uniform section damping slot 6, the central angle Δ of the first uniform section damping slot 7
3Equal on the cylinder body angle Δ of lower dead centre line YY ' on waist shaped hole 8 center lines and thrust plate
4
The cornerite MOB of low-pressure tank 11 is greater than the cornerite POF of high pressure oil groove 2.
The central angle Δ of low voltage side damping slot 11
2Central angle Δ less than high pressure side damping slot 3
1
The degree of depth of the second uniform section damping slot 6 in the low voltage side damping slot 11 is greater than the degree of depth of the first uniform section damping slot 7.
In the plunger pump assignment process plunger active chamber by low pressure to the high pressure side transition and when connecting, can compression shock appear and flow pours in down a chimney, cause that the pulsation of plunger cavity internal pressure rapid change and oil hydraulic pump output flow strengthens, cause very big vibration and noise, have a strong impact on the quality of plunger pump.Big quantity research all concentrates on and reduces by the compression shock aspect of low pressure to high pressure.For the air pocket reason, people consider that the mistake improve the oil absorbency of pump and to avoid the plunger cavity closed volume is unloaded compression swelling and the air pocket that occurs.The present invention find plunger pump by high pressure in the process of low pressure conversion, because flow at high speed phenomenon and the defection of fluid walls emaciated face cause separating out of bubble, because the pressure of oil suction groove is very low in the pump, these bubbles are difficult for dissolving in the fluid, along with the overhanging oil suction of plunger enters plunger cavity, so plunger cavity contains the isolated bubble in oil suction district.In the high pressure side, high pressure oil impacts and enters plunger cavity, and the shattered to pieces meeting of bubble causes very big noise and vibration on the one hand, can aggravate the pulsation of POF simultaneously.And separating out with the shape relation of damping slot of this bubble is close.The present invention is based on discovery and experimental study result, proposed new port plate structure, avoid plunger pump separating out by the bubble of high pressure when low pressure is changed to this phenomenon, reduce pump noise, reduce the flow pulsation of pump.
Working procedure of the present invention is as follows:
The plunger active chamber breaks away from high pressure oil groove 2, to lower dead centre (the corresponding position of OY ' axle in as Fig. 1) motion, in the plunger cavity 12 be and the same high pressure of plunger pump outlet, when movement of cylinder block arrives the OE position (as shown in Figure 1), plunger cavity just in time break away from high pressure oil groove 2 and with low pressure damping slot 11 in the contacting of the first uniform section damping slot 6 (as OD among Fig. 1), plunger cavity 12 is at Δ
4Be to be in to continue compressive state and carry out oil extraction in the angle, the fluid that plunger cavity 12 is discharged flows into 5 (as shown in Figure 3) of oil suction grooves through the first uniform section damping slot 6, the HI section of the first uniform section damping slot 5 has played drag effect, make fluid at the H point owing to the low pressure that fluid breakdown occurs is raise, avoided bubble to separate out and grow up, the raising of this resistance is relevant with the length of HI section, along with plunger cavity at Δ
4Interior pressure reduces, and this resistance also reduces.When cylinder body drive plunger cavity moved to OY ' axle, the overhanging oil-absorbing process of plunger 9 beginnings was because the central angle Δ of the first uniform section damping slot 6
3Equal on the cylinder body angle Δ of lower dead centre line YY ' on waist shaped hole 8 center lines and thrust plate
4So the second uniform section damping slot 7 is connected with the kidney slot 8 on the cylinder body, because the increase of flow area makes the oil suction resistance greatly reduce.Avoided the bubble in the plunger pump working procedure to separate out thus, so the noise of plunger pump greatly reduce, the output flow pulsation reduces with vibration.
Claims (4)
1. plunger pump thrust plate that anti-bubble is separated out comprises that having high pressure oil groove (2), cross section is the thrust plate (1) that triangle flaring high pressure side damping slot (3), oil suction groove (5), low voltage side damping slot (11) are formed; It is characterized in that: low voltage side damping slot (1 1) is to be combined central angle (the Δ of the first uniform section damping slot (7) by the first uniform section damping slot (7) and the second uniform section damping slot (6)
3) equal angle (the Δ of lower dead centre line on (8) center line of waist shaped hole on the cylinder body and the thrust plate (YY ')
4).
2. the plunger pump thrust plate that a kind of anti-bubble according to claim 1 is separated out is characterized in that: the cornerite (MOB) of low-pressure tank (11) is greater than the cornerite (POF) of high pressure oil groove (2).
3. the plunger pump thrust plate that a kind of anti-bubble according to claim 1 is separated out is characterized in that: central angle (the Δ of low voltage side damping slot (11)
2) less than central angle (the Δ of high pressure side damping slot (3)
1).
4. the plunger pump thrust plate that a kind of anti-bubble according to claim 1 is separated out is characterized in that: the degree of depth of the second uniform section damping slot (6) in the low voltage side damping slot (11) is greater than the degree of depth of the first uniform section damping slot (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101086694A CN1293305C (en) | 2003-11-12 | 2003-11-12 | Bubble evolution proof plunger pump port plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101086694A CN1293305C (en) | 2003-11-12 | 2003-11-12 | Bubble evolution proof plunger pump port plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1544813A true CN1544813A (en) | 2004-11-10 |
| CN1293305C CN1293305C (en) | 2007-01-03 |
Family
ID=34334807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101086694A Expired - Fee Related CN1293305C (en) | 2003-11-12 | 2003-11-12 | Bubble evolution proof plunger pump port plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1293305C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225791B (en) * | 2008-01-04 | 2010-06-09 | 镇江大力液压马达有限责任公司 | Distributing plate of plane flow-distributing liquid-pressure motor and manufacturing method therefor |
| CN101892978A (en) * | 2010-07-28 | 2010-11-24 | 北京航空航天大学 | Valve plate structure for plunger pump |
| CN102297131A (en) * | 2011-07-08 | 2011-12-28 | 兰州理工大学 | Port plate and hydraulic pump equipped with it |
| CN101694211B (en) * | 2009-10-16 | 2012-06-13 | 华中科技大学 | Port plate for plunger pump |
| CN102597535A (en) * | 2009-10-13 | 2012-07-18 | 金基赞 | Actuator using pneumatic pressure and hydraulic pressure |
| CN103486016A (en) * | 2013-09-16 | 2014-01-01 | 同济大学 | Valve plate for low-noise anti-cavitation plunger pump |
| CN103883510A (en) * | 2014-04-17 | 2014-06-25 | 哈尔滨工业大学 | Flow pressure characteristic test and experiment device for pressure buffering groove of valve plate |
| CN107514359A (en) * | 2017-10-25 | 2017-12-26 | 青岛力克川液压机械有限公司 | A kind of inclined plate of variable piston pump structure |
| CN113339250A (en) * | 2021-06-30 | 2021-09-03 | 北京航空航天大学宁波创新研究院 | Plunger pump rotor oil window wrap angle detection method |
| CN114382690A (en) * | 2022-01-18 | 2022-04-22 | 中铁工程装备集团有限公司 | Plunger pump valve plate |
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| US4034652A (en) * | 1975-03-06 | 1977-07-12 | Caterpillar Tractor Co. | Method and valve face configuration for reducing noise in a hydraulic pump |
| DE3725361A1 (en) * | 1987-07-30 | 1989-02-16 | Brueninghaus Hydraulik Gmbh | AXIAL PISTON MACHINE IN TYPE DISC OR TYPE AXIS DESIGN WITH SLOT CONTROL AND PRESSURE COMPENSATION CHANNELS |
| CN1025754C (en) * | 1991-12-30 | 1994-08-24 | 甘肃工业大学 | Valving method for low-noise axial plunger pump and valve plate structure |
| US5230274A (en) * | 1992-02-11 | 1993-07-27 | Vickers Incorporated | Variable displacement hydraulic pump with quiet timing |
| US5593285A (en) * | 1995-01-13 | 1997-01-14 | Caterpillar Inc. | Hydraulic axial piston unit with multiple valve plates |
| JP2000097146A (en) * | 1998-09-18 | 2000-04-04 | Hitachi Constr Mach Co Ltd | Piston pump |
| CN2436689Y (en) * | 2000-06-08 | 2001-06-27 | 崔勇达 | High-performance double-action hydraulic vane pump |
| JP4657520B2 (en) * | 2001-08-22 | 2011-03-23 | 東芝機械株式会社 | Piston pump / motor |
| CN2672320Y (en) * | 2003-11-12 | 2005-01-19 | 浙江大学 | Asymmetric damping slot plunger pump flow distribution disk |
-
2003
- 2003-11-12 CN CNB2003101086694A patent/CN1293305C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225791B (en) * | 2008-01-04 | 2010-06-09 | 镇江大力液压马达有限责任公司 | Distributing plate of plane flow-distributing liquid-pressure motor and manufacturing method therefor |
| CN102597535A (en) * | 2009-10-13 | 2012-07-18 | 金基赞 | Actuator using pneumatic pressure and hydraulic pressure |
| CN102597535B (en) * | 2009-10-13 | 2016-01-13 | 金基赞 | Utilize the actuator of air pressure and hydraulic pressure |
| CN101694211B (en) * | 2009-10-16 | 2012-06-13 | 华中科技大学 | Port plate for plunger pump |
| CN101892978A (en) * | 2010-07-28 | 2010-11-24 | 北京航空航天大学 | Valve plate structure for plunger pump |
| CN102297131A (en) * | 2011-07-08 | 2011-12-28 | 兰州理工大学 | Port plate and hydraulic pump equipped with it |
| CN103486016A (en) * | 2013-09-16 | 2014-01-01 | 同济大学 | Valve plate for low-noise anti-cavitation plunger pump |
| CN103883510A (en) * | 2014-04-17 | 2014-06-25 | 哈尔滨工业大学 | Flow pressure characteristic test and experiment device for pressure buffering groove of valve plate |
| CN103883510B (en) * | 2014-04-17 | 2016-04-13 | 哈尔滨工业大学 | A kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing |
| CN107514359A (en) * | 2017-10-25 | 2017-12-26 | 青岛力克川液压机械有限公司 | A kind of inclined plate of variable piston pump structure |
| CN113339250A (en) * | 2021-06-30 | 2021-09-03 | 北京航空航天大学宁波创新研究院 | Plunger pump rotor oil window wrap angle detection method |
| CN114382690A (en) * | 2022-01-18 | 2022-04-22 | 中铁工程装备集团有限公司 | Plunger pump valve plate |
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| CN1293305C (en) | 2007-01-03 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070103 Termination date: 20101112 |