CN201027644Y - Hydraulic gear pump - Google Patents
Hydraulic gear pump Download PDFInfo
- Publication number
- CN201027644Y CN201027644Y CNU2007200190815U CN200720019081U CN201027644Y CN 201027644 Y CN201027644 Y CN 201027644Y CN U2007200190815 U CNU2007200190815 U CN U2007200190815U CN 200720019081 U CN200720019081 U CN 200720019081U CN 201027644 Y CN201027644 Y CN 201027644Y
- Authority
- CN
- China
- Prior art keywords
- gear
- sealing
- gear pump
- needle bearings
- needle bearing
- 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
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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
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The utility model provides a hydraulic gear pump technical proposal, which comprises a casing consisting of a front cover body and a rear casing, wherein, the inside of the casing is provided with a driving gear and a driven gear meshed with each other; the two side-ejection shafts of the driving gear and the driven gear are provided with needle bearings; a side plate and a sealing element are arranged between the needle bearings and the sides of both gears; the needle bearings directly contact the sealing element; the bearing cup external end face chamfer angle of the contact surface of each needle bearing and the sealing element which is less than conventional bearing cup external end face chamfer angle has the R equal to or less than 0.1 mm. Because the needle bearings can directly contact the sealing element, the utility model omits a support baffle which ensures the sealing of the seal element, thereby reducing manufacture cost; moreover, the utility model reduces the axial dimension of the entire gear pump and the axial support distance of the two needle bearings of the driving gear and the driven gear, thereby being helpful to increasing the rated pressure and the service life of the gear pump.
Description
Technical field:
The utility model relates to a kind of oil hydraulic pump, especially a kind of hydraulic gear pump that is used to promote fluid body pressure.
Background technique:
In the prior art, technique known is present hydraulic gear pump in usefulness, it includes the master in housing and the housing, driven gear, compositions such as the Sealing at the side plate and the side plate back side and needle bearing, used needle bearing, because all there is circular arc chamfering standard or bigger both sides, bearing outer ring exterior edge face, because the existence of circular arc chamfering is arranged, if Sealing is pressed on needle bearing one end face, to make Sealing part circle ring area lose support, to between each needle bearing and Sealing, assemble for this reason and support the sealing that catch guarantees Sealing, this just causes the gear pump structure complexity, manufacture cost increases, axial dimension strengthens, influenced the overall performance of gear pump product, this is the existing in prior technology deficiency.
Summary of the invention:
The purpose of this utility model, be exactly at the existing in prior technology deficiency, and provide a kind of hydraulic gear pump technological scheme, this scheme adopts the simple shape that changes the bearing outer ring exterior edge face chamfering of needle bearing, Sealing directly is pressed on needle bearing one end face, saved the support washer, this has just reduced the manufacturing processing cost, and dwindled the axial dimension of whole gear pump, dwindle the axially support distance of driving and driven gear two needle bearings, helped improving the rated pressure and the working life of gear pump.
This programme is realized by following technical measures: include the housing of being made up of front cover body and rear case, intermeshing driving gear and driven gear are arranged in housing, on two side shafts of driving gear and driven gear, needle bearing is arranged, between needle bearing and gear side, side plate and Sealing are arranged, the characteristics of this programme are the direct contact seal parts of an end face of described needle bearing, the bearing outer ring exterior edge face chamfering of each needle bearing and Sealing surface of contact is less than conventional bearing outer ring exterior edge face chamfering.The concrete characteristics of this programme also have, R≤0.1 of the bearing outer ring exterior edge face chamfering of described needle bearing and Sealing surface of contact millimeter.
The beneficial effect of this programme can be learnt according to the narration to such scheme, because the Sealing in this scheme, directly contact with end face of needle bearing, the bearing outer ring exterior edge face chamfering of each needle bearing and Sealing surface of contact, be less than conventional bearing outer ring exterior edge face chamfering, the R of this chamfering≤0.1 millimeter.Owing to make needle bearing can directly compress Sealing, so can save the support washer that guarantees the Sealing sealing, this has just reduced the manufacturing processing cost, and dwindled the axial dimension of whole gear pump, dwindle the axially support distance of driving and driven gear two needle bearings, helped improving the rated pressure and the working life of gear pump.This shows that the utility model compared with prior art has substantive distinguishing features and progress, the beneficial effect of its enforcement also is conspicuous.
Description of drawings:
Fig. 1 is the sectional structure schematic representation of the utility model embodiment.
Fig. 2 is the structure for amplifying schematic representation of A among Fig. 1.
Among the figure, 1 is front cover body, and 2 is needle bearing, and 3 is driving gear, and 4 is side plate, and 5 is Sealing, and 6 is rear case, and 7 is driven gear, and 8 is bearing outer ring, and 9 is needle roller.
Embodiment:
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.
By accompanying drawing as can be seen, the hydraulic gear pump of this programme, the housing of being made up of front cover body (1) and rear case (6) is arranged, intermeshing driving gear (3) and driven gear (7) are arranged in housing, the needle bearing of being made up of bearing outer ring (8) and needle roller (9) (2) is arranged on the both sides shaft of driving gear (3) and driven gear (7), side plate (4) and Sealing (5) are arranged between needle bearing (2) and gear side, described each needle bearing of this programme (2) directly contacts with each Sealing (5), bearing outer ring (8) the exterior edge face chamfering of each needle bearing (2) and Sealing (5) surface of contact is less than the chamfering of conventional bearing outer ring (2) exterior edge face.R≤0.1 of this bearing outer ring (2) exterior edge face chamfering millimeter.
Claims (2)
1. hydraulic gear pump, include the housing of forming by front cover body and rear case, intermeshing driving gear and driven gear are arranged in housing, on two side shafts of driving gear and driven gear, needle bearing is arranged, between needle bearing and gear side, side plate and Sealing are arranged, it is characterized in that: the direct contact seal part of an end face of described needle bearing, the bearing outer ring exterior edge face chamfering of each needle bearing and Sealing surface of contact is less than conventional bearing outer ring exterior edge face chamfering.
2. hydraulic gear pump according to claim 1 is characterized in that: R≤0.1 of the bearing outer ring exterior edge face chamfering of described needle bearing and Sealing surface of contact millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200190815U CN201027644Y (en) | 2007-03-06 | 2007-03-06 | Hydraulic gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200190815U CN201027644Y (en) | 2007-03-06 | 2007-03-06 | Hydraulic gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027644Y true CN201027644Y (en) | 2008-02-27 |
Family
ID=39131850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200190815U Expired - Fee Related CN201027644Y (en) | 2007-03-06 | 2007-03-06 | Hydraulic gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027644Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179229A (en) * | 2015-08-14 | 2015-12-23 | 湖北航天技术研究院特种车辆技术中心 | External-meshed gear pump and hydrodynamic transmission hydraulic system |
| CN107208631A (en) * | 2015-02-04 | 2017-09-26 | 住友精密工业株式会社 | The manufacture method of hydraulic means and the hydraulic means manufactured by the manufacture method |
-
2007
- 2007-03-06 CN CNU2007200190815U patent/CN201027644Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107208631A (en) * | 2015-02-04 | 2017-09-26 | 住友精密工业株式会社 | The manufacture method of hydraulic means and the hydraulic means manufactured by the manufacture method |
| CN105179229A (en) * | 2015-08-14 | 2015-12-23 | 湖北航天技术研究院特种车辆技术中心 | External-meshed gear pump and hydrodynamic transmission hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080227 Termination date: 20100306 |