CN110905801B - Gear pump with fixed axial gap - Google Patents
Gear pump with fixed axial gap Download PDFInfo
- Publication number
- CN110905801B CN110905801B CN201911113381.3A CN201911113381A CN110905801B CN 110905801 B CN110905801 B CN 110905801B CN 201911113381 A CN201911113381 A CN 201911113381A CN 110905801 B CN110905801 B CN 110905801B
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- Prior art keywords
- gear
- bearing
- shell
- pump
- thickness
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention relates to a gear pump with a fixed axial gap, which comprises a pump shell, a gear shaft, an upper bearing, a lower bearing, an upper adjusting gasket, a lower adjusting gasket and a gear, wherein the gear shaft is arranged on the pump shell; the upper neck of the gear is propped against the lower end surface of the inner ring of the upper bearing, and the lower neck of the gear is propped against the upper end surface of the inner ring of the lower bearing, so that the bearing can be rotatably supported; an upper adjusting gasket is arranged between the upper part of the shell and the upper bearing, a lower adjusting gasket is arranged between the lower part of the shell and the lower bearing, the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing, and the sum of the thickness of the upper adjusting gasket and the thickness of the upper part of the shell is smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing. The invention realizes that the gear is not contacted with the shell or the cover plate at two sides in the running process. The friction pair is reduced, and the device has the advantages of light weight, small volume, simple structure and the like.
Description
Technical Field
The invention belongs to the technical field of hydraulic mechanical accessory gear pumps, and particularly relates to a gear pump with a fixed axial clearance.
Background
The conventional gear pump structure includes a pair of external gears d (driving gear, driven gear), a housing a, a bearing b, and a side plate c (or housing), where the gear d and the side plate c form a friction pair, see fig. 2. The structure has the defects that the kinematic pair is easy to wear, generates metal chips, causes gear clamping stagnation and affects the reliability of the product; secondly, the gear d and the side plate c are abraded, so that power loss is caused; in addition, the precision requirement of the relative parts of the wear pair is high, and the production and processing degree of the product is improved.
Disclosure of Invention
In order to achieve the object of the invention: the end face of the gear can not contact with the side plates (or the shell) on the two sides in the operation process, so that the gear and the side plates (or the shell) on the two sides have no friction, and the working reliability of the gear pump is improved. The axial limiting structure has the advantages that the axial clearance between the end face of the gear and the shell can be adjusted by adjusting the thickness of the gasket, the machining precision required by the gear and the shell is reduced, the machining difficulty is reduced, and the cost is saved.
The technical scheme of the invention is as follows: the gear pump with the fixed axial clearance comprises a pump shell 3, a gear shaft 1, an upper bearing 2, a lower bearing 6, an upper adjusting gasket 7, a lower adjusting gasket 4 and a gear 5;
the pump shell forms a gear cavity, the gear is arranged in the gear cavity, the gear shaft penetrates through the gear cavity and is in spline fit with the gear to integrally rotate, and the length of the gear cavity in the axial direction is larger than the width of the gear; gaps are reserved between the upper end surface and the lower end surface of the gear and the upper inner wall and the lower inner wall of the gear cavity respectively;
the upper end surface of the gear axially extends to form an upper neck part, the lower end surface of the gear axially extends to form a lower neck part, the upper neck part and the lower neck part both extend out of the pump shell from the gear cavity, the upper bearing is arranged at the upper part of the pump shell, the lower bearing is arranged at the lower part of the pump shell, and the upper bearing and the lower bearing are both arranged on the shell outside the gear cavity; the upper neck of the gear is propped against the lower end surface of the inner ring of the upper bearing, and the lower neck of the gear is propped against the upper end surface of the inner ring of the lower bearing, so that the bearing can be rotatably supported; an upper adjusting gasket is arranged between the upper part of the shell and the upper bearing, a lower adjusting gasket is arranged between the lower part of the shell and the lower bearing, the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing, and the sum of the thickness of the upper adjusting gasket and the thickness of the upper part of the shell is smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
Further, the upper bearing and the lower bearing are both rolling bearings. Preferably angular contact ball bearings.
Furthermore, the sum of the thickness 4a of the lower adjusting gasket and the thickness 3a of the lower part of the shell is 0.03 mm-0.05 mm smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing.
Furthermore, the sum of the thickness 7a of the upper adjusting shim and the thickness 11a of the upper part of the shell is 0.03-0.05 mm smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
Further, the gear is a driving gear of a gear pump.
Further, the device also comprises an upper bearing seat 8, a locking plate 9 and a locking nut 10; the locking nut is in threaded fit with the upper end of the gear shaft, the lower end of the gear shaft is provided with a step, and the locking nut sequentially compresses and fixes the locking plate, the upper bearing block, the upper bearing, the gear and the lower bearing.
Furthermore, the length of the gear cavity in the axial direction is 0.06 mm-0.1 mm larger than the width of the gear.
The invention has the beneficial effects that: the invention realizes that the gear is not contacted with the shell or the cover plate at two sides in the running process. The friction pair is reduced, and the device has the advantages of light weight, small volume, simple structure and the like.
Drawings
FIG. 1 is a schematic view of a gear pump configuration;
FIG. 2 is a schematic diagram of a gear pump of the prior art;
FIG. 3 is an enlarged view of a portion of the area A in FIG. 1;
FIG. 4 is an enlarged view of a portion of the area B in FIG. 1;
in the figure: 1-a gear shaft; 2-an upper bearing; 3-a pump housing; 4-lower adjusting pad; 5-a gear; 6-lower bearing; 7-upper adjusting shim; 8-upper bearing seat; 9-locking plate; 10-locking a nut; a-a housing; b-a bearing; c-side plate (or shell); a d-gear; 4 a-adjusting the thickness of the gasket; 3 a-lower thickness of the shell; 7 a-adjusting the thickness of the shim; 11 a-shell upper thickness.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Example one
As shown in fig. 1, 3-4, a gear pump with fixed axial clearance is provided, which comprises a pump housing 3, a gear shaft 1, an upper bearing 2, a lower bearing 6, an upper adjusting gasket 7, a lower adjusting gasket 4 and a gear 5;
the pump shell forms a gear cavity, the gear is arranged in the gear cavity, the gear shaft penetrates through the gear cavity and is in spline fit with the gear to integrally rotate, and the length of the gear cavity in the axial direction is larger than the width of the gear; gaps are reserved between the upper end surface and the lower end surface of the gear and the upper inner wall and the lower inner wall of the gear cavity respectively;
the upper end surface of the gear axially extends to form an upper neck part, the lower end surface of the gear axially extends to form a lower neck part, the upper neck part and the lower neck part both extend out of the pump shell from the gear cavity, the upper bearing is arranged at the upper part of the pump shell, the lower bearing is arranged at the lower part of the pump shell, and the upper bearing and the lower bearing are both arranged on the shell outside the gear cavity; the upper neck of the gear is propped against the lower end surface of the inner ring of the upper bearing, and the lower neck of the gear is propped against the upper end surface of the inner ring of the lower bearing, so that the bearing can be rotatably supported; an upper adjusting gasket is arranged between the upper part of the shell and the upper bearing, a lower adjusting gasket is arranged between the lower part of the shell and the lower bearing, the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing, and the sum of the thickness of the upper adjusting gasket and the thickness of the upper part of the shell is smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
The upper bearing and the lower bearing are both rolling bearings. Preferably a ball bearing.
The gear is a driving gear of a gear pump.
The length of the gear cavity in the axial direction is 0.06 mm-0.1 mm larger than the width of the gear.
Example two
The gear pump with the fixed axial clearance comprises a pump shell 3, a gear shaft 1, an upper bearing 2, a lower bearing 6, an upper adjusting gasket 7, a lower adjusting gasket 4 and a gear 5;
the pump shell forms a gear cavity, the gear is arranged in the gear cavity, the gear shaft penetrates through the gear cavity and is in spline fit with the gear to integrally rotate, and the length of the gear cavity in the axial direction is larger than the width of the gear; gaps are reserved between the upper end surface and the lower end surface of the gear and the upper inner wall and the lower inner wall of the gear cavity respectively;
the upper end surface of the gear axially extends to form an upper neck part, the lower end surface of the gear axially extends to form a lower neck part, the upper neck part and the lower neck part both extend out of the pump shell from the gear cavity, the upper bearing is arranged at the upper part of the pump shell, the lower bearing is arranged at the lower part of the pump shell, and the upper bearing and the lower bearing are both arranged on the shell outside the gear cavity; the upper neck of the gear is propped against the lower end surface of the inner ring of the upper bearing, and the lower neck of the gear is propped against the upper end surface of the inner ring of the lower bearing, so that the bearing can be rotatably supported; an upper adjusting gasket is arranged between the upper part of the shell and the upper bearing, a lower adjusting gasket is arranged between the lower part of the shell and the lower bearing, the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing, and the sum of the thickness of the upper adjusting gasket and the thickness of the upper part of the shell is smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
Further, the upper bearing and the lower bearing are both rolling bearings. Preferably angular contact ball bearings.
Furthermore, the sum of the thickness 4a of the lower adjusting gasket and the thickness 3a of the lower part of the shell is 0.03 mm-0.05 mm smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing. Furthermore, the sum of the thickness 7a of the upper adjusting shim and the thickness 11a of the upper part of the shell is 0.03-0.05 mm smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
The gear is a driving gear of a gear pump.
The device also comprises an upper bearing seat 8, a locking plate 9 and a locking nut 10; the locking nut is in threaded fit with the upper end of the gear shaft, the lower end of the gear shaft is provided with a step, and the locking nut sequentially compresses and fixes the locking plate, the upper bearing block, the upper bearing, the gear and the lower bearing.
The length of the gear cavity in the axial direction is 0.06 mm-0.1 mm larger than the width of the gear.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A fixed axial clearance's gear pump which characterized in that: comprises a pump shell, a gear shaft, an upper bearing, a lower bearing, an upper adjusting gasket, a lower adjusting gasket and a gear;
the pump shell forms a gear cavity, the gear is arranged in the gear cavity, the gear shaft penetrates through the gear cavity and is in spline fit with the gear to integrally rotate, and the length of the gear cavity in the axial direction is larger than the width of the gear; gaps are reserved between the upper end surface and the lower end surface of the gear and the upper inner wall and the lower inner wall of the gear cavity respectively;
the upper end surface of the gear axially extends to form an upper neck part, the lower end surface of the gear axially extends to form a lower neck part, the upper neck part and the lower neck part both extend out of the pump shell from the gear cavity, the upper bearing is arranged at the upper part of the pump shell, the lower bearing is arranged at the lower part of the pump shell, and the upper bearing and the lower bearing are both arranged on the shell outside the gear cavity; the upper neck of the gear is propped against the lower end surface of the inner ring of the upper bearing, and the lower neck of the gear is propped against the upper end surface of the inner ring of the lower bearing, so that the bearing can be rotatably supported; an upper adjusting gasket is arranged between the upper part of the shell and the upper bearing, a lower adjusting gasket is arranged between the lower part of the shell and the lower bearing, the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is smaller than the length from the lower end face of the gear to the upper end face of the outer ring of the lower bearing, and the sum of the thickness of the upper adjusting gasket and the thickness of the upper part of the shell is smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
2. A fixed axial clearance gear pump as claimed in claim 1 wherein: the sum of the thickness of the lower adjusting gasket and the thickness of the lower part of the shell is 0.03 mm-0.05 mm smaller than the length from the lower end face of the gear to the upper end face of the lower bearing outer ring.
3. A fixed axial clearance gear pump as claimed in claim 1 wherein: the sum of the thickness of the upper adjusting shim and the thickness of the upper part of the shell is 0.03 mm-0.05 mm smaller than the length from the upper end face of the gear to the lower end face of the outer ring of the upper bearing.
4. A fixed axial clearance gear pump as claimed in claim 1 wherein: the gear is a driving gear of a gear pump.
5. A fixed axial clearance gear pump as claimed in claim 1 wherein: the device also comprises an upper bearing seat, a locking plate and a locking nut; the locking nut is in threaded fit with the upper end of the gear shaft, the lower end of the gear shaft is provided with a step, and the locking nut sequentially compresses and fixes the locking plate, the upper bearing block, the upper bearing, the gear and the lower bearing.
6. A fixed axial clearance gear pump as claimed in claim 1 wherein: the upper bearing and the lower bearing are both rolling bearings.
7. A fixed axial clearance gear pump as claimed in claim 6 wherein: the upper bearing and the lower bearing are both angular contact ball bearings.
8. A fixed axial clearance gear pump as claimed in claim 1 wherein: the length of the gear cavity in the axial direction is 0.06 mm-0.1 mm larger than the width of the gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113381.3A CN110905801B (en) | 2019-11-14 | 2019-11-14 | Gear pump with fixed axial gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113381.3A CN110905801B (en) | 2019-11-14 | 2019-11-14 | Gear pump with fixed axial gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110905801A CN110905801A (en) | 2020-03-24 |
| CN110905801B true CN110905801B (en) | 2021-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911113381.3A Active CN110905801B (en) | 2019-11-14 | 2019-11-14 | Gear pump with fixed axial gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110905801B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB358843A (en) * | 1931-02-06 | 1931-10-15 | Sidney Zaleski Hall | Improvements in and relating to rotary pumps |
| GB980949A (en) * | 1960-12-23 | 1965-01-20 | Clark Equipment Co | Rotary pumps and motors |
| GB2429751A (en) * | 2005-08-31 | 2007-03-07 | Alfa Laval Corp Ab | Axially removable flanged wearplate for lobe pump |
| JP2012062763A (en) * | 2010-09-14 | 2012-03-29 | Taiho Kogyo Co Ltd | Rotary type compressor |
| CN202284539U (en) * | 2011-10-31 | 2012-06-27 | 泊姆克(天津)液压有限公司 | Double-axial gap self compensating high pressure gear pump |
| CN104235011A (en) * | 2013-06-17 | 2014-12-24 | 株式会社神户制钢所 | Gear pump and gear pump operating method |
| CN205243831U (en) * | 2015-12-07 | 2016-05-18 | 第一拖拉机股份有限公司 | Compound liner plate structure's gear pump |
| CN106593861A (en) * | 2016-11-29 | 2017-04-26 | 天津市汇晶丰精密机械有限公司 | Constant-clearance double gear pump without seal bearing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1341699A (en) * | 1970-03-24 | 1973-12-25 | Dowty Technical Dev Ltd | Hydraulic displacement device |
| CN2359497Y (en) * | 1999-01-11 | 2000-01-19 | 泊姆克(天津)液压有限公司 | High-pressure gear pump |
| CN201475179U (en) * | 2009-09-10 | 2010-05-19 | 武汉捷隆汽车电动转向系统有限公司 | Gear shaft assembly for automatically removing axial gap and fixing axial direction |
-
2019
- 2019-11-14 CN CN201911113381.3A patent/CN110905801B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB358843A (en) * | 1931-02-06 | 1931-10-15 | Sidney Zaleski Hall | Improvements in and relating to rotary pumps |
| GB980949A (en) * | 1960-12-23 | 1965-01-20 | Clark Equipment Co | Rotary pumps and motors |
| GB2429751A (en) * | 2005-08-31 | 2007-03-07 | Alfa Laval Corp Ab | Axially removable flanged wearplate for lobe pump |
| JP2012062763A (en) * | 2010-09-14 | 2012-03-29 | Taiho Kogyo Co Ltd | Rotary type compressor |
| CN202284539U (en) * | 2011-10-31 | 2012-06-27 | 泊姆克(天津)液压有限公司 | Double-axial gap self compensating high pressure gear pump |
| CN104235011A (en) * | 2013-06-17 | 2014-12-24 | 株式会社神户制钢所 | Gear pump and gear pump operating method |
| CN205243831U (en) * | 2015-12-07 | 2016-05-18 | 第一拖拉机股份有限公司 | Compound liner plate structure's gear pump |
| CN106593861A (en) * | 2016-11-29 | 2017-04-26 | 天津市汇晶丰精密机械有限公司 | Constant-clearance double gear pump without seal bearing |
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| Publication number | Publication date |
|---|---|
| CN110905801A (en) | 2020-03-24 |
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