CN100360804C - External circulation piston pump - Google Patents
External circulation piston pump Download PDFInfo
- Publication number
- CN100360804C CN100360804C CNB2005100614451A CN200510061445A CN100360804C CN 100360804 C CN100360804 C CN 100360804C CN B2005100614451 A CNB2005100614451 A CN B2005100614451A CN 200510061445 A CN200510061445 A CN 200510061445A CN 100360804 C CN100360804 C CN 100360804C
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- CN
- China
- Prior art keywords
- bearing
- rotor
- shaft
- pump housing
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000005457 optimization Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The present invention relates to an external circulation piston pump which comprises a motor, a speed reducer and a pump body assembly, wherein a driving shaft in the pump body assembly is supported by a first bearing and a second bearing, and a driven shaft is supported by a third bearing and a fourth bearing. A first rotor and a driving gear are arranged on the driving shaft, a second rotor and a driven gear are arranged on the driven shaft, the first rotor is positioned between the first bearing and the second bearing, and the second rotor is positioned between the third bearing and the fourth bearing. The present invention has the advantages that the bending deflection of the driving shaft and the driven shaft is reduced; a sealing gap of a pump cavity is reduced; the performance and the efficiency of the pump are enhanced; the sealing is ensured; simultaneously, the stress of the bearings is largely reduced. A box body and a pump body are designed into a whole body by optimization; the processing form and position tolerance and the installation error of centre distance of two parts of the original box body and the original pump body are eliminated; the mechanism is simplified; the problem that the unevenness of the gap is generated because of the connection of a plurality of parts is avoided; the performance of the pump is enhanced.
Description
(1) technical field
The present invention relates to a kind of outside circulation piston pump.
(2) background technique
The tradition outside circulation piston pump as shown in Figure 1, it is a kind of applications a universal machine product very widely, is mainly used in conveying viscous crude medium.It mainly comprises motor, speed reducer, pump housing assembly, described pump housing assembly comprises front cover 1, the pump housing 2, casing 3, the rear end cover 4 that connects successively, be provided with driving shaft 5 and driven shaft 6 in the pump housing 2 and the casing 3, the output shaft of motor is connected with the input shaft of speed reducer by coupling, and the output shaft of speed reducer is connected with the driving shaft 5 of pump housing assembly by coupling; Driving shaft 5 is by clutch shaft bearing 7 and 8 supportings of second bearing, driven shaft 6 is by the 3rd bearing 9 and 10 supportings of the 4th bearing, driving shaft 5 is provided with the first rotor 11, driving gear 12, driven shaft 6 is provided with second rotor 13 that cooperates with the first rotor 11 and the driven gear 14 that meshes with driving gear 12, and the first rotor 11, second rotor 13 all are positioned at the described pump housing 2.The first rotor 11 is positioned at clutch shaft bearing 7, second bearing, 8 the place aheads, and second rotor 13 is positioned at the 3rd bearing 9, the 4th bearing 10 the place aheads.Motor is after speed reducer slows down during work, driving driving shaft 5 rotates, thereby the driven gear of mediating with driving gear 12 14 also rotates, thereby driven transmission axle 6 rotates, in driving shaft 5, driven shaft 6 synchronous rotation processes, when two rotors were in inlet side, the suction chamber volume increased gradually, form vacuum, fed sheet of a media is drawn in the pump chamber; When two rotors are rotated further, when discharging the limit, the discharge side volume constantly reduces with medium transport, and pressure medium raises, and is forced out pump chamber.Two rotors constantly rotate, the continuous cyclically-varying of working chamber volume, thereby the purpose of realization fed sheet of a media.In this mechanism, the first rotor 11, driving shaft 5, clutch shaft bearing 7, second bearing 8 have been formed a cantilever structure, and second rotor 8, driven shaft 6, the 3rd bearing 9, the 4th bearing 10 have also been formed a cantilever structure.In this structure driving shaft 5, driven shaft 6 stressed poor, amount of deflection is big; And the amount of deflection size of the first rotor 11, second rotor 13 directly is subjected to the influence of driving shaft 5, driven shaft 6 amounts of deflection, and its sealing effect quality and bearing life length are subjected to the influence of driving shaft 5, driven shaft 6 amounts of deflection too.If driving shaft 5, driven shaft 6 amounts of deflection are excessive, not only making to leak in the pump chamber increases, and decreased performance also will influence the sealing effect of driving shaft 5, driven shaft 6 and each sealing even damage Sealing; Two rotors and the pump housing are misaligned, and generation rubs partially, even stuck, influences the normal operation and the reliability of pump.This shows that above-mentioned conventional boom-mounted structure is very big to this pump performance, reliability and life-span influence.In addition, because the pump housing 2 and casing 3 are not an one-piece element, there is error in their centre distance, alignment error in addition, be difficult to guarantee the pump gap evenly and size, cause leaking in the pump many, head pressure is lower.
(3) summary of the invention
In order to overcome stressed poor, the deficiency that amount of deflection is big of outside circulation piston pump driving shaft in the prior art, driven shaft, the invention provides stressed poor, the outside circulation piston pump that amount of deflection is little of a kind of driving shaft, driven shaft.
Further, the invention provides the incorporate outside circulation piston pump of a kind of pump housing and casing.
The technological scheme that the present invention solves its technical problem is:
A kind of outside circulation piston pump, comprise motor, speed reducer, pump housing assembly, described pump housing assembly comprises front cover, the pump housing, casing, the rear end cover that connects successively, be provided with driving shaft and driven shaft in the described pump housing and the casing, the output shaft of described motor is connected with the input shaft of described speed reducer by coupling, and the output shaft of described speed reducer is connected by the driving shaft of coupling with described pump housing assembly;
Described driving shaft is by clutch shaft bearing and the supporting of second bearing, described driven shaft is by the 3rd bearing and the supporting of the 4th bearing, described driving shaft is provided with the first rotor, driving gear, described driven shaft is provided with second rotor that cooperates with described the first rotor and the driven gear that meshes with described driving gear, described the first rotor, second rotor all is positioned at the described pump housing, described clutch shaft bearing, seal by Sealing between the 3rd bearing and the described pump housing, described second bearing, seal by Sealing between the 4th bearing and the described casing, the described pump housing and described driving shaft, between the first rotor, and the pump housing and described driven shaft, the Sealing sealing is all arranged between second rotor; The first rotor is between the described clutch shaft bearing and second bearing, and described second rotor is between described the 3rd bearing and the 4th bearing.
Further, the described pump housing and casing are integrated to be one, and both turn to body at one.
Further, also be with first location cylinder on the described driving shaft, described first location cylinder is between described clutch shaft bearing and the first rotor; Also be with second location cylinder on the described driven shaft, described second location cylinder is between described the 3rd bearing and second rotor.
Further, be provided with first between the end of described the first rotor and the described driving shaft and adjust pad, be provided with second between the end of described second rotor and the described driven shaft and adjust pad.
Further, described front cover is connected by middle cover with described body.
Beneficial effect of the present invention is: 1. be the cantilever structure innovative design of the first rotor, driving shaft, clutch shaft bearing, second bearing simply-support structure, the position of the first rotor has moved on between the clutch shaft bearing and second bearing, make the first rotor be delivered to the transfer that also changes of the point of action of power on driving shaft on the driving shaft, thereby make the amount of deflection of axle significantly reduce.The situation of second rotor, driven shaft, the 3rd bearing, the 4th bearing is identical with the situation of the first rotor, driving shaft, clutch shaft bearing, second bearing.Driving shaft, driven shaft amount of deflection reduce, and have promptly dwindled the pump chamber seal clearance, have improved pump performance and efficient, have guaranteed sealing again, simultaneously, have also significantly reduced the stressed of first, second, third, fourth bearing, have prolonged the life-span.2. casing and pump housing optimal design are integral, have eliminated the processing form and position tolerance and the alignment error of original casing, two part centre distance of the pump housing, promptly simplified mechanism, it is inhomogeneous to have avoided a plurality of parts to connect the generation gap again, dwindle the gap, reduced interior leakage, improved this pump performance.
(4) description of drawings
Fig. 1 is the pump housing assembly sectional arrangement drawing of existing outside circulation piston pump.
Fig. 2 is the pump housing assembly sectional arrangement drawing of outside circulation piston pump of the present invention.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
With reference to Fig. 2, a kind of outside circulation piston pump comprises motor, speed reducer, pump housing assembly, body 16, rear end cover 4 that described pump housing assembly comprises successively the front cover 1 that connects, middle cover 15, traditional pump housing and casing are integrated.The middle cover 15 here can play the effect of supporting other component and seal operation chamber, oil pocket.Be provided with driving shaft 5 and driven shaft 6 in the described body 16, the output shaft of described motor is connected with the input shaft of described speed reducer by coupling, and the output shaft of described speed reducer is connected with the driving shaft 5 of described pump housing assembly by coupling;
Described driving shaft 5 is by clutch shaft bearing 7 and 8 supportings of second bearing, described driven shaft 6 is by the 3rd bearing 9 and 10 supportings of the 4th bearing, described driving shaft 5 is provided with the first rotor 11, driving gear 12, described driven shaft 6 is provided with second rotor 13 that cooperates with described the first rotor 11 and the driven gear 14 that meshes with described driving gear 12, described clutch shaft bearing 7, seal by lip-type packing 17 between the 3rd bearing 9 and the described body 16, described second bearing 8, also seal between the 4th bearing 10 and the described body 16 by lip-type packing 17, described body 16 and described driving shaft 5, between the first rotor 11, and body 16 and described driven shaft 6, mechanical sealing element 18 sealings are all arranged between second rotor 13;
The first rotor 11 is between the described clutch shaft bearing 7 and second bearing 8, and the first rotor 11 and clutch shaft bearing 7, second bearing 8 constitute the simply-support structure.Described second rotor 13 is between described the 3rd bearing 9 and the 4th bearing 10, and second rotor 13 and the 3rd bearing 9, the 4th bearing 10 also constitute the simply-support structure.Be provided with first between the end of described the first rotor 11 and the described driving shaft 5 and adjust pad 19, be provided with second between the end of described second rotor 13 and the described driven shaft 6 and adjust pad 20.First, second adjusts the axial clearance that pad is used to adjust two rotors, is not necessary part of the present invention.
Also be with first location cylinder 21 on the described driving shaft 6, described first location cylinder 21 is between described clutch shaft bearing 7 and the first rotor 11; Also be with second location cylinder 22 on the described driven shaft 6, described second location cylinder 22 is between described the 3rd bearing 9 and second rotor 13.First, second location cylinder can further play the positioning action to two rotors and four bearings, makes machine run more stable.
The working principle of working principle of the present invention and outside circulation piston pump of the prior art is identical, and the first rotor 11 and second rotor 13 constantly rotate, the continuous cyclically-varying of working chamber volume, thereby the purpose of realization fed sheet of a media.
Certainly body can separately be made in the present embodiment, connects by flange then, and the same with traditional outside circulation piston pump when body is divided into the pump housing and casing, the first rotor 11, second rotor 13 all are positioned at the pump housing.
Claims (2)
1. outside circulation piston pump, comprise motor, speed reducer, pump housing assembly, described pump housing assembly comprises front cover, middle cover, the pump housing, casing, the rear end cover that connects successively, be provided with driving shaft and driven shaft in the described pump housing and the casing, the output shaft of described motor is connected with the input shaft of described speed reducer by coupling, and the output shaft of described speed reducer is connected by the driving shaft of coupling with described pump housing assembly;
Described driving shaft is by clutch shaft bearing and the supporting of second bearing, described driven shaft is by the 3rd bearing and the supporting of the 4th bearing, in overlapping during clutch shaft bearing and the 3rd bearing are arranged on, described driving shaft is provided with the first rotor, driving gear, described driven shaft is provided with second rotor that cooperates with described the first rotor and the driven gear that meshes with described driving gear, described the first rotor, second rotor all is positioned at the described pump housing, described clutch shaft bearing, seal by Sealing between the 3rd bearing and the described pump housing, described second bearing, seal by Sealing between the 4th bearing and the described casing, the described pump housing and described driving shaft, between the first rotor, and the pump housing and described driven shaft, the Sealing sealing is all arranged between second rotor;
It is characterized in that: the first rotor is between the described clutch shaft bearing and second bearing, and described second rotor is between described the 3rd bearing and the 4th bearing; The described pump housing and casing are one, and both turn to body at one; Also be with first location cylinder on the described driving shaft, described first location cylinder is between described clutch shaft bearing and the first rotor; Also be with second location cylinder on the described driven shaft, described second location cylinder is between described the 3rd bearing and second rotor.
2. outside circulation piston pump as claimed in claim 1 is characterized in that: be provided with first between the end of described the first rotor and the described driving shaft and adjust pad, be provided with second between the end of described second rotor and the described driven shaft and adjust pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100614451A CN100360804C (en) | 2005-11-04 | 2005-11-04 | External circulation piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100614451A CN100360804C (en) | 2005-11-04 | 2005-11-04 | External circulation piston pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1752446A CN1752446A (en) | 2006-03-29 |
| CN100360804C true CN100360804C (en) | 2008-01-09 |
Family
ID=36679418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100614451A Expired - Fee Related CN100360804C (en) | 2005-11-04 | 2005-11-04 | External circulation piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100360804C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| CN1095040C (en) * | 1998-04-21 | 2002-11-27 | 阿特里尔斯布希股份有限公司 | Positive displacement machine |
| CN1420281A (en) * | 2001-11-19 | 2003-05-28 | 成都希望电子研究所 | Rotary screw gas compressor |
| CN2580146Y (en) * | 2002-11-22 | 2003-10-15 | 于志洵 | Gear pump |
| CN1656318A (en) * | 2002-05-29 | 2005-08-17 | 莱博尔德真空技术有限责任公司 | Dual-shaft vacuum pump |
| CN2849234Y (en) * | 2005-11-04 | 2006-12-20 | 浙江工业大学 | External circulation piston pump |
-
2005
- 2005-11-04 CN CNB2005100614451A patent/CN100360804C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095040C (en) * | 1998-04-21 | 2002-11-27 | 阿特里尔斯布希股份有限公司 | Positive displacement machine |
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| CN1420281A (en) * | 2001-11-19 | 2003-05-28 | 成都希望电子研究所 | Rotary screw gas compressor |
| CN1656318A (en) * | 2002-05-29 | 2005-08-17 | 莱博尔德真空技术有限责任公司 | Dual-shaft vacuum pump |
| CN2580146Y (en) * | 2002-11-22 | 2003-10-15 | 于志洵 | Gear pump |
| CN2849234Y (en) * | 2005-11-04 | 2006-12-20 | 浙江工业大学 | External circulation piston pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1752446A (en) | 2006-03-29 |
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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: 20080109 Termination date: 20131104 |