CN102966504B - With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing - Google Patents
With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing Download PDFInfo
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- CN102966504B CN102966504B CN201210525166.6A CN201210525166A CN102966504B CN 102966504 B CN102966504 B CN 102966504B CN 201210525166 A CN201210525166 A CN 201210525166A CN 102966504 B CN102966504 B CN 102966504B
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Abstract
The invention discloses a kind of with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, mainly comprise plunger 1, check valve 2, upper spring seat 3, piston spring 4, lower spring cup 5, outlet check valve assembly 6, spring seat 7, spring 8, valve base 9, rotating shaft 10, swash plate 11, plunger cavity housing 12, plunger pump shell 13.Import and export check valve is all designed to baffle-type by the present invention, greatly improves the contamination resistance of valve, and import check valve is only by oil pressure cntrol, does not need independent spring to reset, and improve the compactedness of plunger pump global design, topology layout is more reasonable; Check valve due to baffle-type is not easy fatigue, is not easy to produce the problem of roughness reduction, and engineering feasibility increases substantially.In addition, will be the cylindrical body of a top band chamfering without piston shoes plunger design, chamfering can allow the inclined oil hole of air of its upper end and low-pressure cavity UNICOM all the time, thus shortens plungers length, reduces the quality of plunger pump.
Description
Technical field
The present invention relates to a kind of plunger pump, particularly a kind of without the plunger pump of piston shoes without oil distribution casing.
Prior art
The existing import check valve without retainer plunger pump designed a model and outlet check valve are all steel ball types, each plunger place all has two springs to reset, plunger head has snap ring by spacing for spring seat herein, plunger upper half part and lower half portion diameter inconsistent, (the patent No.: 98239786.0).
The import check valve of prior art and outlet check valve are steel ball type, and (steel ball type check valve is difficult to accomplish to seal completely, the sealing of check valve determines the efficiency of pump, directly limit the life-span of plunger pump its service time), structural design is coarse, contamination resistance is poor, layout, structure and structural design of fittings engineering practice feasibility very low.
Plunger top and the bottom are inconsistent, and head needs to install snap ring and carries out spacing to upper spring seat.Because the inconsistent meeting in top and the bottom makes when same long sealing strip requires, plunger needs the length more grown to meet, and can produce longer housing and higher plunger pump gross weight simultaneously.
Steel ball type check valve is linear sealing, and linear sealing seals by line contact during two sphere-contacts.The sealing couple figure tolerance matched with steel ball is difficult to ensure, difficulty of processing is large, is difficult to accomplish theoretic sealing (steel ball type check valve is generally used in static seal structure) completely in using.Because plunger pump working speed can reach 4000r/min, so check valve also needs the passive high-frequency switching movements carrying out 4000 times/min.Because the contact zones of linear sealing are narrower, be easy in the switching movements process of high frequency (4000 times/min), occur that fatigue deformation and fatigue wear all easily appear in the sealing strip of steel ball surface and the sealing strip of couple, surface roughness is deteriorated simultaneously, causes poorly sealed and causes plunger pump efficiency significantly to reduce.
Summary of the invention
The object of the invention is: complicated in order to solve the piston structure that exists in existing plunger pump, steel ball type check valve sealing difference plunger pump efficiency is low wait not enough, propose a kind of with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing.
Technological scheme of the present invention is: a kind of with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, the pump housing is made up of upper and lower two-part, and pump housing upper and lower is connected by stud centering.Plunges pump body mainly comprises plunger 1, check valve 2, upper spring seat 3, piston spring 4, lower spring cup 5, outlet check valve assembly 6, spring seat 7, spring 8, valve base 9, rotating shaft 10, swash plate 11, plunger cavity housing 12, plunger pump shell 13;
Described plunger 1 is the cylindrical body of a upper end with chamfering, has axially not Through-cavity in cylindrical body, and described cavity is communicated with in-line by the oblique oil circuit hole of chamfered end; A boss is had in plunger 1 lower end, check valve 2 one end is only against plunger 1 inner convex platform, plays seal action, and the other end is limited on upper spring seat 3, upper spring seat 3 is only against the end face of plunger 1, and piston spring 4 two ends are only against upper spring seat 3 and lower spring cup 5 respectively; Lower spring cup 5 is on plunger pump shell 13; Plunger 1, check valve 2, upper spring seat 3, piston spring 4 and lower spring cup 5 are all loaded in the hole of plunger cavity housing 12; Plunger cavity housing 12 is fixed in plunger pump shell 13; Outlet check valve assembly 6 is loaded in plunger pump shell 13, one end is communicated with plunger cavity by oil circuit hole, the other end communicates with exit orifice, described outlet check valve assembly 6 is built with check valve 2, check valve 2 one end is only against on valve base 9, one end seat is on spring 8, and the other end of spring 8 is only against on spring seat 7; In the centre of plunger pump shell 13, rotating shaft 10 is housed, rotating shaft 10 is provided with swash plate 11, the upper end of described plunger 1 only leans against on swash plate 11;
The check valve 2 designed in the present invention is a centre with plane, the cylindrical body having hollow out around, and middle plane seals, and around openwork part played oil effect.Why import check valve 2 is designed to the cylindrical body being with cylndrical surface, is in order to valve is when plunger cavity inwall moves up and down, can guiding function be played, make valve stable movement, upset or dumb problem of moving do not occur.
Working procedure: when rotating shaft 10 is rotated, swash plate 11 is driven to rotate together, because the assembling of swash plate 11 is with certain inclination angle, plunger 1 is made to produce axial motion in plunger cavity, when plunger 1 moves to the process of peak from minimum point, low pressure oil enters oil circuit in plunger by the oblique oil circuit hole of plunger 1 upper end, and now check valve 2 is in open mode under self gravitation or effect of inertia, and low pressure oil enters plunger cavity by check valve 2 surrounding openwork part; When plunger 1 moves to the process of minimum point from peak, shoe cream room in plunger cavity reduces rapidly and causes the following pressure of import check valve 2 to make it move up higher than top, the relative movement of check valve 2 and plunger 1 makes the sealing strip in the middle of check valve 2 be sealed the lower end of axial for plunger 1 oilhole, start pressurization, the elastic force that check valve 2 now in outlet check valve assembly overcomes spring 8 under the effect of oil pressure is opened, make fuel oil flow to oil outlet by the surrounding's openwork part exporting check valve 2, complete the function of buying oil of plunger pump.
Beneficial effect of the present invention: import check valve and outlet check valve are all designed to baffle-type, greatly improve the contamination resistance of valve, and import check valve is only by oil pressure cntrol, independent spring is not needed to reset, improve the compactedness of plunger pump global design, topology layout is more reasonable; Check valve due to baffle-type is not easy fatigue, is not easy to produce the problem of roughness reduction, and engineering feasibility increases substantially.In addition, will be the cylindrical body of a top band chamfering without piston shoes plunger design, chamfering can allow the inclined oil hole of air of its upper end and low-pressure cavity UNICOM all the time, thus shortens plungers length, reduces the quality of plunger pump.
Accompanying drawing explanation
Fig. 1 be the present invention propose with baffle-type check valve without the axial piston pump schematic diagram of piston shoes without oil distribution casing.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is the check valve plan view in embodiment.
In figure: 1-plunger, 2-check valve, 3-upper spring seat, 4-piston spring, 5-lower spring cup, 6-export check valve assembly, 7-spring seat, 8-spring, 9-valve base, 10-rotating shaft, 11-swash plate, 12-plunger cavity housing, 13-plunger pump shell
Concrete embodiment
Consult Fig. 1-Fig. 3, in the present embodiment with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, the pump housing is made up of upper and lower two-part, and pump housing upper and lower is connected by stud centering.Plunges pump body mainly comprises plunger 1, check valve 2, upper spring seat 3, piston spring 4, lower spring cup 5, outlet check valve assembly 6, spring seat 7, spring 8, valve base 9, rotating shaft 10, swash plate 11, plunger cavity housing 12, plunger pump shell 13;
Working method is that swash plate rotates, function of buying oil is completed by one group of (two) check valve 2, import check valve 2 is arranged in plunger 1, open when ensureing plunger 1 oil suction, close during supercharging, outlet check valve 2 cuts out when ensureing plunger 1 oil suction, opens during supercharging, thus ensure that oil pump is bought oil function.
Plunger 1 is that a upper end band has ChamferCyl.Import export check valve is all designed to baffle-type, and import check valve is pressure differential control type check valve, does not experience spring force; Outlet check valve experiences spring force and oil pressure, opens after oil pressure reaches certain pressure.
Check valve 2 is designed to petal type, and plane sealed plunger oil circuit in pressurization that between petal, around openwork part plays oil-feed effect and centre plays pressurization.Common formation cylndrical surface of the corner of petal, when plunger cavity inwall moves up and down, plays guiding function, thus makes valve stable movement and upset or dumb problem of moving do not occur.
Spring force perpendicular is delivered on plunger 1 by the upper spring seat 3 being arranged on plunger 1 lower end, starts position-limiting action to the stroke of check valve 2 simultaneously.
Claims (3)
1. with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, it is characterized in that: the pump housing is made up of upper and lower two-part, pump housing upper and lower is connected by stud centering; Described axial piston pump mainly comprises plunger (1), check valve (2), upper spring seat (3), piston spring (4), lower spring cup (5), outlet check valve assembly (6), spring seat (7), spring (8), valve base (9), rotating shaft (10), swash plate (11), plunger cavity housing (12), plunger pump shell (13);
Described plunger (1) is the cylindrical body of a upper end with chamfering, has axially not Through-cavity in cylindrical body, and described cavity is communicated with in-line by the oblique oil circuit hole of chamfered end; A boss is had in plunger (1) lower end, check valve (2) one end is only against plunger (1) inner convex platform, play seal action, the other end is limited on upper spring seat (3), upper spring seat (3) is only against the end face of plunger (1), and piston spring (4) two ends are only against upper spring seat (3) and lower spring cup (5) respectively; Lower spring cup (5) seat is on plunger pump shell (13); Plunger (1), check valve (2), upper spring seat (3), piston spring (4) and lower spring cup (5) are all loaded in the hole of plunger cavity housing (12); Plunger cavity housing (12) is fixed in plunger pump shell (13); Outlet check valve assembly (6) is loaded in plunger pump shell (13), one end is communicated with plunger cavity by oil circuit hole, the other end communicates with exit orifice, described outlet check valve assembly (6) is built with check valve (2), check valve (2) one end is only against on valve base (9), one end seat is on spring (8), and the other end of spring (8) is only against on spring seat (7); In the centre of plunger pump shell (13), rotating shaft (10) is housed, rotating shaft (10) is provided with swash plate (11), the upper end of described plunger (1) only leans against on swash plate (11).
2. as claimed in claim 1 with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, it is characterized in that: the cylindrical body of described check valve (2) to be a centre with plane, surrounding have hollow out.
3. as claimed in claim 1 or 2 with baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing, it is characterized in that: described check valve (2) is petal type cylindrical body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210525166.6A CN102966504B (en) | 2012-12-10 | 2012-12-10 | With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210525166.6A CN102966504B (en) | 2012-12-10 | 2012-12-10 | With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102966504A CN102966504A (en) | 2013-03-13 |
| CN102966504B true CN102966504B (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210525166.6A Active CN102966504B (en) | 2012-12-10 | 2012-12-10 | With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing |
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| CN (1) | CN102966504B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564576B (en) * | 2015-01-15 | 2017-10-20 | 沃尔科技有限公司 | The high-pressure plunger pump and Handheld high-voltage injection apparatus of water lubrication |
| CN114718831B (en) * | 2022-03-30 | 2023-05-02 | 浙江大学 | High-pressure manual pump for closed hydraulic system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2054863A (en) * | 1934-10-31 | 1936-09-22 | Hydraulic Brake Co | Compressor for fluid pressure systems |
| GB865876A (en) * | 1958-03-15 | 1961-04-19 | Dante Scalambra | Pump with automatically variable output |
| JPH03222873A (en) * | 1989-11-01 | 1991-10-01 | Toyota Motor Corp | Swash plate type axial plunger pump |
| DE19803533A1 (en) * | 1998-01-30 | 1999-08-05 | Itt Mfg Enterprises Inc | Axial piston pump |
| CN2869373Y (en) * | 2006-03-02 | 2007-02-14 | 陆伯武 | No-piston-shoes-and-oil-distributing-disk axial plunger pump |
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- 2012-12-10 CN CN201210525166.6A patent/CN102966504B/en active Active
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| CN102966504A (en) | 2013-03-13 |
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