CN221033090U - Gear pump with inner and outer ring closed thrust compensation - Google Patents
Gear pump with inner and outer ring closed thrust compensation Download PDFInfo
- Publication number
- CN221033090U CN221033090U CN202322853833.XU CN202322853833U CN221033090U CN 221033090 U CN221033090 U CN 221033090U CN 202322853833 U CN202322853833 U CN 202322853833U CN 221033090 U CN221033090 U CN 221033090U
- Authority
- CN
- China
- Prior art keywords
- shaped
- shaft
- gear shaft
- pump body
- sleeve
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
Abstract
The utility model discloses a gear pump with inner and outer ring closed thrust compensation, which comprises a pump body, a front cover plate, a rear cover plate, an O-shaped sealing ring, a cylindrical pin, a driving gear shaft, a driven gear shaft, an 8-shaped sleeve, a shaft sleeve, a lip-shaped sealing piece and a hole elastic retainer ring. Compared with the prior art, the internal part of the pump body is divided into the high pressure area, the low pressure area and the two medium pressure areas through the sealing ring arranged in the outer groove, the liquid of the pump body is limited to flow from the high pressure area to the low pressure area spontaneously, and meanwhile, axial thrust compensation is provided for the gear shaft through the high pressure area, so that the axial clearance of the gear is kept to be minimum, the leakage of oil is reduced, and the volumetric efficiency and the system pressure are improved.
Description
Technical Field
The utility model relates to the technical field of gear pumps, in particular to a gear pump with inner and outer ring closed thrust compensation.
Background
Gear pumps are rotary pumps that rely on the change and movement of working volume created between the pump cavity and the meshing gears to deliver or pressurize a liquid. When the gears rotate, the volume of the space at the disengaging side of the gears is changed from small to large to form vacuum, liquid is sucked in, the volume of the space at the engaging side of the gears is changed from large to small, and the liquid is extruded into the pipeline; the suction chamber is separated from the discharge chamber by the meshing line of the two gears, the pressure at the discharge outlet of the gear pump being entirely dependent on the amount of resistance at the pump outlet. The existing gear pump has the problems that the abrasion is increased, the leakage of internal oil is increased and the system pressure is reduced due to the fact that the gear shaft moves transversely as the gap exists between the shaft section and the pump body, and oil in the pump body spontaneously moves from a high-pressure area to a low-pressure area.
Disclosure of utility model
The utility model aims to provide a gear pump with inner and outer ring closed thrust compensation, which solves the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the device comprises a pump body, a front cover plate, a rear cover plate, an O-shaped sealing ring, a cylindrical pin, a driving gear shaft, a driven gear shaft, an 8-shaped sleeve, a shaft sleeve, a lip-shaped sealing piece and an elastic retainer ring for holes; the front cover plate and the rear cover plate are arranged on the front side and the rear side of the pump body, the front cover plate is assembled and fixed by cylindrical pins, and the rear cover plate is assembled and fixed by screws; an O-shaped sealing ring is additionally arranged at the inner side edge of the joint of the front cover plate and the rear cover plate and the pump body; the 8-shaped sleeves are arranged on the front side and the rear side of the interior of the pump body; the driving gear shaft is arranged on the upper side in the pump body, the front shaft section of the driving gear shaft passes through the 8-shaped sleeve and the front cover plate after being assembled with the shaft sleeve, and the rear shaft section is assembled with the shaft sleeve and is arranged in the 8-shaped sleeve; the driven gear shaft is arranged at the lower side of the pump body, shaft sleeves are arranged at the front side and the rear side of the driven gear shaft in a matched manner, the driven gear shaft is arranged in an 8-shaped sleeve, and the gear section of the driven gear shaft is meshed with the gear section of the driving gear shaft; the lip seal and the elastic retainer ring for holes are arranged on the front shaft section of the driving gear shaft and positioned in the front cover plate; an inner groove and an outer groove are formed in the end face of one side of the 8-shaped sleeve, sealing rings are assembled in the inner groove and the outer groove, and oil holes are formed in the left side and the right side between the inner groove and the outer groove.
As a preferable technical scheme of the utility model, the inner groove is in an 8 shape and is arranged along an 8-shaped hole on the 8-shaped sleeve.
As a preferable technical scheme of the utility model, the outer groove is in an 8 shape and is arranged along the outer edge of the 8-shaped sleeve.
As a preferable technical scheme of the utility model, the outer groove is provided with four arc-shaped bulges, and the top ends of the arc-shaped bulges are tangential with the 8-shaped sleeves.
As a preferable technical scheme of the utility model, the arc-shaped bulges on the outer groove are symmetrically arranged along the central line, and the included angle between the axes of the arc-shaped bulges and the central line in the vertical direction is 45 degrees.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the inner part of the pump body is divided into the high pressure area, the low pressure area and the two medium pressure areas through the sealing ring arranged in the outer groove, the liquid of the pump body is limited to flow from the high pressure area to the low pressure area spontaneously, and meanwhile, axial thrust compensation is provided for the gear shaft through the high pressure area, so that the axial clearance of the gear is kept to be minimum, the leakage of oil is reduced, and the volumetric efficiency and the system pressure are improved.
Drawings
FIG. 1 is a cross-sectional view of the present utility model;
FIG. 2 is a cross-sectional view of an "8" sleeve of the present utility model, FIG. 1;
FIG. 3 is a cross-sectional view of the "8" sleeve of the present utility model 2;
In the figure: pump body 1, front cover plate 2, rear cover plate 3, O-shaped sealing ring 4, cylindrical pin 5, driving gear shaft 6, driven gear shaft 7, 8-shaped sleeve 8, inner groove 81, outer groove 82, shaft sleeve 9, lip seal 10 and elastic retainer ring 11 for hole
Detailed Description
Example 1
As shown in fig. 1 to 3, the utility model discloses a gear pump with inner and outer ring sealing thrust compensation, which comprises a pump body 1, a front cover plate 2, a rear cover plate 3, an O-shaped sealing ring 4, a cylindrical pin 5, a driving gear shaft 6, a driven gear shaft 7, an 8-shaped sleeve 8, a shaft sleeve 9, a lip seal 10 and a hole elastic retainer ring 11; the front cover plate 2 and the rear cover plate 3 are arranged on the front side and the rear side of the pump body 1, the front cover plate 2 is assembled and fixed by a cylindrical pin 5, and the rear cover plate 3 is assembled and fixed by screws; an O-shaped sealing ring 4 is additionally arranged at the inner side edge of the joint of the front cover plate 2 and the rear cover plate 3 and the pump body 1; the 8-shaped sleeves 8 are arranged on the front side and the rear side of the interior of the pump body 1; the driving gear shaft 6 is arranged on the upper side in the pump body 1, the front shaft section of the driving gear shaft passes through the 8-shaped sleeve 8 and the front cover plate 2 after being provided with the shaft sleeve 9, and the rear shaft section is provided with the shaft sleeve 9 which is arranged in the 8-shaped sleeve 8; the driven gear shaft 7 is arranged at the lower side of the interior of the pump body 1, shaft sleeves 9 are assembled at the front and rear side shaft sections of the driven gear shaft and are arranged in an 8-shaped sleeve 8, and the gear section of the driven gear shaft is meshed with the gear section of the driving gear shaft 6; the lip seal 10 and the circlip 11 for holes are arranged on the front shaft section of the driving gear shaft 6 and positioned in the front cover plate 2; an inner groove 81 and an outer groove 82 are formed in the end face of one side of the 8-shaped sleeve 8, and sealing rings are assembled in the inner groove 81 and the outer groove 82. The outer groove 82 is symmetrically provided with four circular arc-shaped bulges, a sealing ring fixed in the circular arc-shaped bulges is in contact with the inner wall of the pump body 1, the inside of the pump body is divided into two medium-pressure areas up and down, the pressure of the medium-pressure areas is positioned between a high-pressure area and a low-pressure area, liquid is isolated and limited to spontaneously flow from the high pressure to the low pressure through the sealing ring, and further axial movement of a gear shaft along with the liquid flow is reduced.
The working principle of the utility model is as follows: the direction described in the present working principle is as viewed in the axial direction from the long axis side of the drive gear shaft 6 with the pump body 1 as the center. When the gear pump is started, external power drives the driving gear shaft 6 to rotate, the driven gear shaft 7 is meshed with the gear section of the driving gear shaft 6 to rotate, the clockwise rotation of the driving gear shaft 6 is recorded as positive rotation, the left side in the pump body 1 is used for absorbing oil in a low-pressure area, and the right side is used for forming oil in a high-pressure area; at this time, the sealing rings in the inner groove 81 and the outer groove 82 seal high-pressure oil, and as the inner groove 81 is provided with four circular arc-shaped bulges, the sealing rings arranged in the outer groove 82 are in contact with the inner wall of the pump body to divide the interior of the pump body 1 into four areas, wherein the upper side and the lower side of the pump body are medium-pressure oil; oil flows from a high-pressure area to a low-pressure area through an oil hole on the 8-shaped sleeve, and because the high-pressure sealing pressure is high, the pressure can be used for counteracting the axial force generated by rotation of the gear shaft, the 8-shaped sleeve is pushed to the direction of the gear section, so that the gear is compressed, the leakage of the tooth side is reduced, and the end face thrust compensation is completed. When the driving gear shaft 7 is reversed, the high-pressure area and the low-pressure area inside the pump body 1 are opposite, and the oil way reversely flows, so that the same effect can be generated, and bidirectional clearance compensation can be performed. The amount of thrust force can be varied by varying the area between the inner groove 81 and the outer groove 82.
According to the utility model, the inner part of the pump body is divided into the high pressure area, the low pressure area and the two medium pressure areas through the sealing ring arranged in the outer groove, the liquid of the pump body is limited to flow from the high pressure area to the low pressure area spontaneously, and meanwhile, axial thrust compensation is provided for the gear shaft through the high pressure area, so that the axial clearance of the gear is kept to be minimum, the leakage of oil is reduced, and the volumetric efficiency and the system pressure are improved.
Although the specific embodiments of the present utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes and modifications without inventive labor may be made within the scope of the present utility model without departing from the spirit of the present utility model, which is within the scope of the present utility model.
Claims (5)
1. The utility model provides a gear pump of inner and outer circle closure thrust compensation which characterized in that: the device comprises a pump body (1), a front cover plate (2), a rear cover plate (3), an O-shaped sealing ring (4), a cylindrical pin (5), a driving gear shaft (6), a driven gear shaft (7), an 8-shaped sleeve (8), a shaft sleeve (9), a lip-shaped sealing piece (10) and a hole elastic retainer ring (11); front cover plates (2) and rear cover plates (3) are arranged on the front side and the rear side of the pump body (1), the front cover plates (2) are assembled and fixed by cylindrical pins (5), and the rear cover plates (3) are assembled and fixed by screws; an O-shaped sealing ring (4) is additionally arranged at the inner side edge of the joint of the front cover plate (2) and the rear cover plate (3) and the pump body (1); the 8-shaped sleeves (8) are arranged on the front side and the rear side of the interior of the pump body (1); the driving gear shaft (6) is arranged on the upper side in the pump body (1), the front shaft section of the driving gear shaft passes through the 8-shaped sleeve (8) and the front cover plate (2) after being provided with the shaft sleeve (9), and the rear shaft section is provided with the shaft sleeve (9) which is arranged in the 8-shaped sleeve (8); the driven gear shaft (7) is arranged at the lower side of the inside of the pump body (1), shaft sleeves (9) are assembled at the front side and the rear side of the driven gear shaft, the driven gear shaft is arranged in an 8-shaped sleeve (8), and the gear section of the driven gear shaft is meshed with the gear section of the driving gear shaft (6); the lip seal (10) and the hole circlip (11) are arranged on the front shaft section of the driving gear shaft (6) and positioned in the front cover plate (2); an inner groove (81) and an outer groove (82) are formed in the end face of one side of the 8-shaped sleeve (8), sealing rings are assembled in the inner groove (81) and the outer groove (82), and oil holes are formed in the left side and the right side between the inner groove (81) and the outer groove (82).
2. The gear pump with inner and outer race seal thrust compensation of claim 1 wherein: the inner groove (81) is in an 8 shape and is arranged along an 8-shaped hole on the 8-shaped sleeve (8).
3. The gear pump with inner and outer race seal thrust compensation of claim 1 wherein: the outer groove (82) is in an 8 shape and is arranged along the outer edge of the 8-shaped sleeve (8).
4. A gear pump for inner and outer race closure thrust compensation as claimed in claim 3 wherein: four arc-shaped bulges are arranged on the outer groove (82), and the top ends of the arc-shaped bulges are tangential with the 8-shaped sleeve (8).
5. The gear pump with inner and outer race seal thrust compensation of claim 4 wherein: the arc-shaped protrusions on the outer grooves (82) are symmetrically arranged along the central line, and the included angle between the axes of the arc-shaped protrusions and the central line in the vertical direction is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322853833.XU CN221033090U (en) | 2023-10-24 | 2023-10-24 | Gear pump with inner and outer ring closed thrust compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322853833.XU CN221033090U (en) | 2023-10-24 | 2023-10-24 | Gear pump with inner and outer ring closed thrust compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221033090U true CN221033090U (en) | 2024-05-28 |
Family
ID=91182587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322853833.XU Active CN221033090U (en) | 2023-10-24 | 2023-10-24 | Gear pump with inner and outer ring closed thrust compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221033090U (en) |
-
2023
- 2023-10-24 CN CN202322853833.XU patent/CN221033090U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8608465B2 (en) | Positive-displacement rotary pump having a positive-displacement auxiliary pumping system | |
| CN103291609A (en) | Biaxial harmonic gear pump | |
| CN221033090U (en) | Gear pump with inner and outer ring closed thrust compensation | |
| CN106609753B (en) | Merge gerotor pump and motor | |
| CN103291612A (en) | Harmonic gear pump | |
| CN101078398A (en) | Rolling extrusion soft variable-volume fluid mechanical device | |
| CN213627990U (en) | Combined internal gear pump of pin vane pump | |
| CN221299474U (en) | Gear pump with lubricating oil path arranged outside | |
| CN101265898A (en) | Planet cyclic gear train type polygonal rotor pump | |
| CN110500270B (en) | Bidirectional high-speed miniature plunger pump with inserted oil port | |
| CN107489611B (en) | Small impact gear type oil pump | |
| CN106837783B (en) | Helical gear and helical gear pump with large wrap angle and few teeth | |
| CN112253451A (en) | Combined internal gear pump of pin vane pump | |
| CN108506184B (en) | Non-pulsation large-stroke plunger pump | |
| CN208236589U (en) | A kind of convex dribbling plug emulsion pump of valve type fluid-distributing axial | |
| CN220890488U (en) | Double-stage high-pressure gear hydraulic pump | |
| CN220646189U (en) | Bidirectional gear pump with axial compensation | |
| CN105952637A (en) | Large displacement high pressure gear pump with driving and driven wheels in different sizes | |
| CN201206544Y (en) | Polygon rotor pump of planet epicyclic train | |
| CN111997893B (en) | Flexible low linear velocity tooth-type molded line meshing wearable pump for robot arm | |
| CN2097295U (en) | Internal-engagement internal cycloidal oil pump | |
| CN219299513U (en) | Gear pump with sealing and self-priming functions | |
| CN112551473B (en) | Unloading oil sweeping and pumping device | |
| CN213540707U (en) | But impeller pump of automatically cleaning | |
| CN207960927U (en) | A kind of high pressure gear oil pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |