CN102305201B - High-pressure pump with star wheel and axial plunger - Google Patents
High-pressure pump with star wheel and axial plunger Download PDFInfo
- Publication number
- CN102305201B CN102305201B CN 201110235662 CN201110235662A CN102305201B CN 102305201 B CN102305201 B CN 102305201B CN 201110235662 CN201110235662 CN 201110235662 CN 201110235662 A CN201110235662 A CN 201110235662A CN 102305201 B CN102305201 B CN 102305201B
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- Prior art keywords
- cylinder body
- main shaft
- transmission main
- pressure pump
- plunger
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- Expired - Fee Related
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- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 241000239290 Araneae Species 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to a high-pressure pump with a star wheel and axial plungers, and the high-pressure pump comprises a cylinder body, plungers, a transmission main shaft and a front cover. The high-pressure pump is characterized in that the transmission main shaft the back end of which is provided with an eccentric hole is provided; a joint bearing assembly is arranged in the eccentric hole; the outer spherical surface of the joint bearing assembly and the concave spherical surface in the eccentric hole of the transmission main shaft constitute a spherical surface connecting structure; a star wheel is circumferentially uniformly distributed with sphere-connecting rod seat holes which are connected to plungers arranged in the cylinder body plunger holes by virtue of sphere-connecting rods in one-to-one correspondence; the star wheel shaft is connected with the bearing inner hole of the joint bearing assembly in the eccentric hole of the transmission main shaft; and the hemispherical hole of a back butting seat at the back part of the star wheel is flexibly connected with the sphere at the front end of the mandrel of the back butting seat. By substituting the star wheel structure for the traditional swash plate and slipping shoe structure, the high-pressure pump disclosed by the invention has the advantages of small volume, light weight, easiness and convenience for maintenance and repair, high efficiency, no oil loss, energy conservation, environment friendliness.
Description
Technical field
The present invention relates to axial piston pump, especially a kind of its stroking mechanism adopts the axial plunger high-pressure service pump of star wheel structure.
Background technique
Axial piston pump is dynamical element and executive component important in hydraulic system, is used widely in Hydraulic Field such as engineering machinery.Traditional cam-type axial piston pump mainly is comprised of thrust plate, cylinder body, bulb plunger, piston shoes, transmission shaft, swash plate, housing etc., in cylinder body, a plurality of plungers are equipped with in even circumferential distribution vertically, plunger end is with piston shoes, under working state, cylinder body is with the rotation of transmission shaft, piston shoes act on swash plate, make plunger do along the cylinder body plunger hole variation that axially reciprocating produces enclosed volume, the discharge that liquid medium sucked and pressurize of dispensing window by thrust plate reaches the purpose of required fluid pressure.
The shortcoming that the cam-type axial piston pump of conventional construction exists: the one, because the gradient of swash plate can not be excessive, it has restricted the stroke of plunger, and regulation range is little, affects the capacity of pump; The 2nd, the lubricated liquid oil that leans between the driving component piston shoes of flow distribution apparatus and swash plate is supplied with, and therefore can produce unavoidably the oil damage; The 3rd, stroking mechanism consists of friction pair by swash plate and piston shoes, easily produces wearing and tearing.
Summary of the invention
The objective of the invention is by architecture advances, to propose a kind of spider gear shaft to piston high-pressure pump for overcoming the shortcoming of prior art existence.
Purpose of the present invention is achieved through the following technical solutions: spider gear shaft is to piston high-pressure pump, comprise cylinder body, plunger, transmission main shaft and protecgulum, axially be evenly distributed in a plurality of plunger holes along transmission main shaft in cylinder body, plunger is housed respectively in each plunger hole, protecgulum is contained in the front end of cylinder body, protecgulum is provided with filler opening and oil outlet, it is characterized in that:
A. the rear end of described transmission main shaft is provided with eccentric opening, is provided with the joint shaft bearing assembly in eccentric opening, the outer spherical surface of joint shaft bearing assembly and transmission main shaft) the interior concave spherical surface formation spherical surface connecting structure of eccentric opening;
Be provided with star-wheel in the closed hood of b, described rear end of the cylinder block, uniform ball link seat hole on the circumference of star-wheel, ball link seat hole connects one to one by ball link and the plunger of device in the cylinder body plunger hole, the brearing bore of the joint shaft bearing assembly in the axle of star-wheel and the eccentric opening of transmission main shaft is connected, the centre bit at star-wheel rear portion installs rear footstock hemisphere hole, and the mandrel front end spheroid of rear footstock hemisphere hole and rear footstock is flexibly connected.
Described rear footstock is fastenedly connected by stay tube and bolt and cylinder body.
Be provided with closed hood between described rear footstock and cylinder body.
Before described cylinder body, end periphery is provided with oil sucting valve and force feed valve.
Compared with prior art, the invention has the beneficial effects as follows: 1. adopt star wheel structure to replace traditional inclined disc type structure, between star-wheel and transmission main shaft, between star-wheel and rear footstock and star-wheel all adopt spherical surface connecting structure with being connected of plunger, expanded the stroke adjustment scope of plunger, effectively increase the capacity of pump, improved working efficiency.2. changed traditional cam-type axial piston pump stroking mechanism and consisted of the structural type of friction pair by piston shoes and swash plate, cancelled traditional distributing device, reduced mechanical wear, damaged without oil.3. changed the structural type of prior art from overall structure, have overall volume little, lightweight, the maintenance easy, the advantages such as efficient is high, energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the structural representation of one of embodiment of the present invention;
Fig. 2 is the A-A partial sectional view of Fig. 1.
Number in the figure represents respectively: 1 stay tube, 2-bolt, footstock after 3-, 4-star-wheel, footstock hemisphere hole after 5-, 6-joint shaft bearing assembly, the fastening bung flange of 7-, 8-ball link seat hole, 9-open type ball watt, 10-ball link adjustment circle, 11-ball link, 12-closed hood, the 13-plunger, 14-cylinder body, 15-transmission main shaft, 16-protecgulum, the 17-filler opening, 18-oil-feed annular groove, 19-oil outlet, 20-goes out oil ring groove, 21-oil sucting valve, 22-force feed valve.
Embodiment
Fig. 1 is one embodiment of the present of invention, spider gear shaft comprises that to piston high-pressure pump cylinder body 14, plunger 13, transmission main shaft 15, protecgulum 16 form, the interior a plurality of plunger holes of axial circumference uniform distribution along transmission main shaft 15 of cylinder body 14, plunger 13 are contained in the plunger hole of cylinder body 14 reciprocating.Cylinder body 14 is established the stepped shape central shaft hole, installs a rear end with the transmission main shaft 15 of eccentric opening, establishes tapered roller bearing between transmission main shaft 15 and cylinder body 14 central shaft holes, establishes the inner sleeve with concave spherical surface in the eccentric opening of transmission main shaft 15.Be provided with joint shaft bearing assembly 6 in the eccentric opening of transmission main shaft 15, two tapered roller bearings in joint shaft bearing assembly 6, concave spherical surface in the outer spherical surface of joint shaft bearing assembly 6 and transmission main shaft 15 eccentric openings consists of spherical surface connecting structure, and joint shaft bearing assembly 6 is fixed on the eccentric opening of transmission main shaft 15 by fastening bung flange 7.
A star-wheel 4 is arranged in the closed hood 12 of cylinder body 14 rear ends, uniform ball link seat hole 8 on its circumference, and ball link seat hole 8 connects one to one by ball link 11 and the plunger 13 of device in cylinder body 14 plunger holes, consists of a plurality of stars combinations with this.Ball link seat hole 8 liner hemisphere watt, the spherical part of ball link 11 is fixing by the open type ball watts 9 and the ball link adjustment circle 10 that are located in ball link seat hole 8.Star-wheel 4 axles are connected with the brearing bore of transmission main shaft 15 eccentric opening intrinsic articulation bearing uniies 6, the centre bit at star-wheel 4 rear portions installs rear footstock hemisphere hole 5, rear footstock hemisphere hole 5 liner hemisphere watt, rear footstock hemisphere hole 5 is flexibly connected with the mandrel front end spheroid of rear footstock 3.Rear footstock 3 is fastenedly connected by stay tube 1 and bolt 2 and cylinder body 14, is provided with closed hood 12 between rear footstock 3 and cylinder body 14, with the space sealing of 14 of rear footstock 3 and cylinder bodies.
The rear footstock hemisphere hole 5 of transmission main shaft 15, cylinder body 14, rear footstock 3, star-wheel 4 is concentric setting with protecgulum 16.The fore device protecgulum 16 of cylinder body 13, and be bolted connection, protecgulum 16 is provided with filler opening 17, oil outlet 19 and goes out oil ring groove 20.
Shown in Figure 2, be provided with supporting oil sucting valve 21 corresponding with its plunger hole and force feed valve 22 at the front end periphery of cylinder body 14, oil sucting valve 21 is connected with oil-feed annular groove 18, force feed valve 22 with go out oil ring groove 20 and be connected.
Under running state, when outer power connection for transmission main shaft 15 rotations, the joint shaft bearing assembly 6 that drives in transmission main shaft 15 eccentric openings swings, under the effect of joint shaft bearing assembly 6, star-wheel 4 does not rotate, and the axis of star-wheel 4 axles is according to the throw of eccentric of transmission main shaft 15 eccentric openings, and the central point of later footstock 3 spheroids is that conical tip forms swinging track and is conical rotation.The ball link seat hole 8 central point lines of rear footstock hemisphere hole 5 central points of star-wheel 4 and star-wheel 4 each stars combinations are vertical with the axis of star-wheel 4 axles.Because the axis of star-wheel 4 axles is done conical the rotation, each star combination of star-wheel 4 will be in an orderly manner after centered by the mandrel spheroid of footstock 3 point swing, ball link 11 pushes away, 13 to-and-fro motion of stay column plug, thereby realizes pump oil.
Because the oil circuit of this pump is fixed, the distributing device that there is no conventional construction, each plunger hole oil suction of cylinder body 14 is to be drawn from oil-feed annular groove 18 by oil sucting valve 21, each plunger hole force feed is pressed into out in oil ring groove 20 fuel-displaced through force feed valve 22, thereby reach minimizing mechanical wear, damage without oil, increase work efficiency, the effect of energy-conserving and environment-protective.
Claims (4)
1. a spider gear shaft to piston high-pressure pump, comprises cylinder body, plunger, transmission main shaft and protecgulum, axially is evenly distributed in a plurality of plunger holes along transmission main shaft in cylinder body, plunger is housed respectively in each plunger hole, protecgulum is contained in the front end of cylinder body, and protecgulum is provided with filler opening and oil outlet, it is characterized in that:
A. the rear end of described transmission main shaft (15) is provided with eccentric opening, is provided with joint shaft bearing assembly (6) in eccentric opening, and the concave spherical surface in the outer spherical surface of joint shaft bearing assembly (6) and transmission main shaft (15) eccentric opening consists of spherical surface connecting structure;
Be provided with star-wheel (4) in the closed hood (12) of b, described cylinder body (14) rear end, uniform ball link seat hole (8) on the circumference of star-wheel (4), ball link seat hole (8) connects one to one by ball link (11) and the plunger (13) of device in cylinder body (14) plunger hole, the brearing bore of the joint shaft bearing assembly (6) in the eccentric opening of the axle of star-wheel (4) and transmission main shaft (15) is connected, the centre bit at star-wheel (4) rear portion installs rear footstock hemisphere hole (5), and rear footstock hemisphere hole (5) is flexibly connected with the mandrel front end spheroid of rear footstock (3).
2. spider gear shaft according to claim 1 to piston high-pressure pump, is characterized in that described rear footstock (3) is fastenedly connected with cylinder body (14) by stay tube (1) and bolt (2).
3. spider gear shaft according to claim 1 and 2 to piston high-pressure pump, is characterized in that being provided with closed hood (12) between described rear footstock (3) and cylinder body (14).
4. spider gear shaft according to claim 1 to piston high-pressure pump, is characterized in that the front end periphery of described cylinder body (14) is provided with oil sucting valve (21) and force feed valve (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235662 CN102305201B (en) | 2011-08-17 | 2011-08-17 | High-pressure pump with star wheel and axial plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235662 CN102305201B (en) | 2011-08-17 | 2011-08-17 | High-pressure pump with star wheel and axial plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102305201A CN102305201A (en) | 2012-01-04 |
| CN102305201B true CN102305201B (en) | 2013-06-05 |
Family
ID=45379098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110235662 Expired - Fee Related CN102305201B (en) | 2011-08-17 | 2011-08-17 | High-pressure pump with star wheel and axial plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102305201B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019205142A1 (en) * | 2019-04-10 | 2020-10-15 | Robert Bosch Gmbh | Hydrostatic axial piston machine with through drive |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3800905A1 (en) * | 1988-01-14 | 1989-07-27 | Rexroth Mannesmann Gmbh | Pump, in particular axial-piston pump |
| JPH0642431A (en) * | 1992-07-27 | 1994-02-15 | Toyota Motor Corp | Swash plate type plunger pump |
| CN1267791A (en) * | 1999-03-18 | 2000-09-27 | 金钟大 | Rotary pump |
| WO2007104257A1 (en) * | 2006-03-14 | 2007-09-20 | Zhu Raphael | An axial plunger pump or motor |
| CN101358585B (en) * | 2008-09-11 | 2011-11-16 | 谌小堰 | Oblique crankshaft Variable plunger pump |
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2011
- 2011-08-17 CN CN 201110235662 patent/CN102305201B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102305201A (en) | 2012-01-04 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 |