CN214145877U - Servo energy-saving internal rotation type gear pump - Google Patents
Servo energy-saving internal rotation type gear pump Download PDFInfo
- Publication number
- CN214145877U CN214145877U CN202023332640.2U CN202023332640U CN214145877U CN 214145877 U CN214145877 U CN 214145877U CN 202023332640 U CN202023332640 U CN 202023332640U CN 214145877 U CN214145877 U CN 214145877U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pump body
- pressure maintaining
- oil outlet
- oil inlet
- 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
Images
Landscapes
- Rotary Pumps (AREA)
Abstract
The utility model discloses a servo energy-saving inward-rotation type gear pump, which comprises a pump body, a front cover arranged at the front end of the pump body and a rear cover arranged at the rear end of the pump body, wherein the front cover is provided with an oil inlet and an oil inlet channel, when fluid is sucked into a cavity of the pump body from the oil inlet through the oil inlet channel or high-pressure fluid discharged from the cavity of the pump body through the oil outlet channel reaches an oil outlet, the fluid does not need to pass through a through hole on an inner gear ring, no turbulent flow obstruction is formed, the fluid output by the oil outlet channel leads the high-pressure fluid flowing out of the cavity of the pump body into the oil outlet in a direction parallel to the axial direction of an outer gear shaft, and the high-pressure fluid formed by compression can pass through the side wall of the cavity of the pump body and pass through the oil outlet channel, the oil outlet can flow out rapidly in large quantity, the pressure and the flow of the output fluid can be stable, and particularly the excellent performance of the servo energy-saving pump at high pressure and low rotating speed is improved.
Description
Technical Field
The utility model relates to a pump equipment technical field, concretely relates to servo energy-conserving adversion formula gear pump.
Background
Patent publication No. CN203627218U discloses an internal rotation type gear pump, in which a gear shaft is driven by a mandrel in a pump body, and then the inner gear ring is driven to rotate synchronously by using a partial meshing relationship between the gear shaft and the inner gear ring, in the process of both rotation, fluid (such as hydraulic oil) is sucked into a chamber of the pump body from an oil inlet, and then the pressurized fluid is discharged out of the chamber from an oil outlet, whereas a high-pressure oil groove is concavely formed in an inner wall surface of the chamber of the internal rotation type gear pump, a plurality of through holes are formed in a circumferential surface of the inner gear ring, and the chamber is divided into high and low-pressure chambers by a pressure retainer, the oil inlet and the oil outlet of the internal rotation type gear pump are both disposed on an inner wall of the chamber of the pump body, the oil inlet and the oil outlet are both disposed in a manner of facing the mandrel, when the fluid enters the chamber from the oil inlet, the fluid enters the inner gear ring from a low-pressure region near the oil inlet through the through holes on the inner gear ring and the low-pressure regions on both sides of the inner gear ring, and when the inner gear ring rotates, if impurities are mixed in a cavity of a pump body, the inner wall pressure blocking area of a high-pressure cavity is easily scratched, so that the problems that the pressure of fluid of an output fluid oil pump in the high-pressure oil groove cannot be increased and the flow of the fluid is lost are caused, and the function of the oil pump is lost, and the internal rotation type failed gear pump can convey the fluid unsmoothly.
SUMMERY OF THE UTILITY MODEL
In view of this, provide a servo energy-conserving interior commentaries on classics formula gear pump, the utility model aims to solve the technical problem be: how to improve the smoothness of fluid delivery of a servo energy-saving internal rotation type gear pump.
In order to solve the above problems, the present invention adopts the following technical solutions:
a servo energy-saving internal rotation type gear pump comprises:
a pump body;
a front cover arranged at the front end of the pump body and a rear cover arranged at the rear end of the pump body;
the pressure retainer is arranged between the inner gear ring and the outer gear shaft;
the front cover is provided with an oil inlet and an oil inlet channel, the oil inlet is communicated with the outer end face of the front cover, the oil inlet is communicated with the oil inlet channel, the oil inlet channel is communicated with the cavity of the pump body, and the oil inlet channel is used for guiding fluid entering from the oil inlet into the cavity of the pump body in a direction parallel to the axial direction of the external gear shaft;
the rear cover is provided with an oil outlet and an oil outlet channel, the oil outlet is communicated with the outer end face of the rear cover, the oil outlet is communicated with the oil outlet channel, the oil outlet channel is communicated with the cavity of the pump body, and the oil outlet channel is used for guiding high-pressure fluid flowing out of the cavity of the pump body into the oil outlet in a direction parallel to the axial direction of the external gear shaft.
Preferably, the pressure holder includes:
a crescent pressure maintaining positive plate and an arc pressure maintaining auxiliary plate;
the pressure maintaining positive piece comprises a first half crescent part and a second half crescent part;
the peripheral surface of the second half crescent part is provided with a containing groove, the pressure maintaining auxiliary piece is arranged in the containing groove, a pressure guide cavity is formed by a gap between the bottom of the containing groove and the pressure maintaining auxiliary piece, and a blocking part for blocking the pressure maintaining auxiliary piece is formed by the groove wall of the containing groove adjacent to the first half crescent part;
a first elastic sheet groove and a second elastic sheet groove are formed in the bottom of the accommodating groove;
the first elastic piece groove is internally provided with a first elastic piece, the second elastic piece groove is internally provided with a second elastic piece and a pressure maintaining rod, the first elastic piece is abutted to the pressure maintaining auxiliary piece, the second elastic piece is abutted to the pressure maintaining rod, and the pressure maintaining rod is abutted to the pressure maintaining auxiliary piece.
Preferably, two end faces of the pressure maintaining positive piece are respectively provided with an embedding groove, the two embedding grooves are respectively provided with a fixing column, a pressure side plate is arranged between the inner gear ring and the front cover, a pressure side plate is also arranged between the inner gear ring and the rear cover, one end of each fixing column is embedded in the two embedding grooves of the pressure maintaining positive piece, the other end of each fixing column penetrates through the pressure side plate and then is inserted into one front insertion hole of the front cover, and one end of each fixing column penetrates through the pressure side plate and then is inserted into one rear insertion hole of the rear cover.
Preferably, the front end and the rear end of the pump body are respectively provided with a positioning column, the positioning column arranged at the front end of the pump body is inserted into the positioning hole of the front cover, and the positioning column arranged at the rear end of the pump body is inserted into the positioning hole of the rear cover.
Preferably, the end part of the first half crescent part is a first tooth end, and the angle of the first tooth end is 20-40 degrees.
Preferably, the end part of the second half-moon tooth part is a second tooth end, the angle of the second tooth end is 15-35 degrees, and the angle of the first tooth end is larger than that of the second tooth end.
Preferably, the first elastic sheet is a wave spring.
Preferably, the second elastic sheet is a wave spring.
The utility model has the advantages that:
fluid need not through the through hole on the ring gear from the oil inlet and when being inhaled pump body cavity through the oil feed passageway or when discharging to the oil-out from pump body cavity via an oil outlet passageway, can not form the vortex and hinder, just the utility model discloses well oil-out is not in the footpath of mandrel, and high-pressure liquid can be discharged to the oil outlet passageway fast by the quick outflow of a large amount of side directions of cavity, provides the output of the stable flow of oil pump and pressure, and high-pressure liquid oil extraction is not at the external diameter of ring gear, and ring gear and pump body are when fluid inhales the foreign matter and scratches the body because of the accident, can not cause sudden pressure drop or flow loss's big problem yet, are difficult for causing the oil pump inefficacy, can effectively promote the smoothness nature of carrying fluid.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
fig. 5 is a perspective view of the middle pressure retainer of the present invention;
fig. 6 is an exploded view of the middle pressure retainer of the present invention;
fig. 7 is a side view of the middle pressure retainer of the present invention;
fig. 8 is a schematic view of the pressure-holding sub-sheet in the pressure retainer in an open state;
fig. 9 is an exploded view of the present invention.
Reference numerals:
1. keeping pressure for positive plate; 2. a pressure maintaining auxiliary sheet; 3. a first crescent half; 4. a second crescent half; 5. a fitting groove; 6. fixing a column; 7. accommodating grooves; 8. a first clip groove; 9. a second clip groove; 10. a first spring plate; 11. a second elastic sheet; 12. a pressure maintaining rod; 13. a pump body; 14. a front cover; 15. a rear cover; 16. an inner gear ring; 17. an outer gear shaft; 18. a pressure side plate; 19. a front jack; 20. a rear jack; 21. a first tooth end; 22. the outer side of the first half crescent part; 23. the inner side of the first half crescent part; 24. a pressure guide cavity; 25. a blocking portion; 26. a second tooth end; 27. an oil inlet; 28. an oil inlet channel; 29. a chamber; 30. an oil outlet; 31. An oil outlet channel; 32. a positioning column; 33. positioning holes; 34. and (6) lubricating oil grooves.
Detailed Description
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the present invention will be further described with reference to the specific embodiments and the accompanying drawings, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without creative efforts.
It will be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "inner", and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "a group" means two or more.
As shown in fig. 1 to 4, a servo energy-saving internal-rotation type gear pump includes:
a pump body 13;
a front cover 14 provided at the front end of the pump body 13 and a rear cover 15 provided at the rear end of the pump body 13;
an inner ring gear 16 disposed in the cavity 29 of the pump body 13 and an outer gear shaft 17 partially engaged with the inner ring gear, a pressure retainer being disposed between the inner ring gear 16 and the outer gear shaft 17;
the front cover 14 has an oil inlet 27 and an oil inlet passage 28, the oil inlet 27 is communicated with the outer end surface of the front cover 14, the oil inlet 27 is communicated with the oil inlet passage 28, the oil inlet passage 28 is communicated with the pump body cavity 29, and the oil inlet passage 28 can guide the fluid entering from the oil inlet 27 into the pump body cavity 29 in the direction parallel to the axial direction of the external gear shaft 17;
the rear cover 15 has an oil outlet 30 and an oil outlet channel 31, the oil outlet 30 is communicated with the outer end surface of the rear cover 15, the oil outlet 30 is communicated with the oil outlet channel 31, the oil outlet channel 31 is communicated with the pump body cavity 29, and the oil outlet channel 31 can guide high-pressure fluid flowing out of the pump body cavity 29 into the oil outlet 30 in a direction parallel to the axial direction of the external gear shaft 17. Fluid need not through the through hole on the ring gear when being sucked pump body cavity 29 from oil inlet 27 and through oil feed passageway 28 or from pump body cavity 29 when through the high-pressure fluid of oil outlet channel 31 exhaust to oil-out 30, can not form the vortex and hinder, the utility model discloses oil outlet channel 31 does not set up in the inner wall of pump body cavity 29, does not also set up in the footpath of external tooth axle 17, and the high-pressure fluid accessible pump body cavity 29 that the pressurized formed lateral wall and through oil outlet channel 31, the quick outflow of a large amount of oil-out 30. The utility model discloses only set up lubricated lubricating-oil groove 34 of usefulness in cavity 29 and do not set up high pressure outlet oil groove in addition. The utility model discloses output fluidic pressure and flow that can be stable, especially during the low rotational speed of high pressure, promote the superior performance of servo energy-saving pump when the low rotational speed of high pressure.
As shown in fig. 3, in the present embodiment, the front end and the rear end of the pump body 13 are respectively provided with a positioning column 32, the positioning column 32 provided at the front end of the pump body 13 is inserted into the positioning hole 33 of the front cover 14, and the positioning column 32 provided at the rear end of the pump body 13 is inserted into the positioning hole 33 of the rear cover 15.
As shown in fig. 4-8, in the present embodiment, the pressure retainer includes a pressure maintaining positive plate 1 and a pressure maintaining auxiliary plate 2, the pressure maintaining positive plate 1 is crescent-shaped, the pressure maintaining positive plate 1 includes a first half crescent part 3 and a second half crescent part 4, inner and outer peripheral surfaces of the first half crescent part 3 and the second half crescent part 4 are arc-shaped, the pressure maintaining auxiliary plate 2 is arc-shaped, two end surfaces of the pressure maintaining positive plate 1 are respectively provided with a fitting groove 5, the two fitting grooves 5 are respectively provided with a fixing post 6 (as shown in fig. 3), wherein an accommodating groove 7 is provided on an outer peripheral surface of the second half crescent part 4, the pressure maintaining auxiliary plate 2 is disposed in the accommodating groove 7, a first spring plate groove 8 and a second spring plate groove 9 are provided at a bottom of the accommodating groove 7, a first spring plate 10 is disposed in the first spring plate groove 8, a second spring plate 11 and a pressure maintaining rod 12 are disposed in the second spring plate groove 9, the first spring plate 10 is abutted against the pressure maintaining auxiliary plate 2, the second elastic sheet 11 abuts against the pressure maintaining rod 12, and the pressure maintaining rod 12 abuts against the pressure maintaining sub-sheet 2.
As shown in fig. 3 and 4, the pressure maintaining positive plate 1, the pressure maintaining auxiliary plate 2, the first elastic plate 10, the second elastic plate 11 and the pressure maintaining rod 12 are arranged between the external gear shaft 17 and the internal gear ring 16, the inner circumferential surface of the pressure maintaining positive plate 1 abuts against the gear of the external gear shaft 17, the outer circumferential surface of the pressure maintaining auxiliary plate 2 abuts against the gear of the internal gear ring 16, the outer circumferential surface of the pressure maintaining auxiliary plate 2 is arranged between the first elastic plate 10 and the gear abutting against the gear of the internal gear ring 16 under the elastic force of the second elastic plate 11, a pressure side plate 18 is arranged between the internal gear ring 16 and the front cover 14, a pressure side plate 18 is also arranged between the internal gear ring 16 and the rear cover 15, one end of the two fixing columns 6 is embedded in the two embedding grooves 5 of the pressure maintaining positive plate 1, wherein the other end of one fixing column 6 passes through the pressure side plate 18 and then is inserted into one front insertion hole 19 of the front cover 14, one end of the other fixing column 6 passes through the pressure side plate 18 and then is inserted into one rear insertion hole 20 of the rear cover 15, the combination of two fixed columns 6 and two tabling grooves 5 is utilized to keep the fixed pressure keeper at the position of the servo energy-saving inward-rotating gear pump.
As shown in fig. 2-8, when the energy-saving internal gear pump of the present invention actually works, the external gear shaft 17 is driven by a power source (e.g. a motor), and then the internal gear ring 16 is driven to rotate synchronously by utilizing the partial meshing relationship between the external gear shaft 17 and the internal gear ring 16, during the rotation process of the two, fluid (e.g. hydraulic oil) can be sucked into the chamber of the pump body 13 from the oil inlet, when the fluid is brought to the first half crescent 3 of the pressure maintaining positive plate 1, the fluid is divided from the first tooth end 21 at the end of the first half crescent 3, the fluid is divided into two flow directions, one flow direction flows into the gap between the first half crescent outside 22 and the tooth portion of the internal gear ring 16, and the fluid gradually generates a pressurizing effect along with the decrease of the gap, and enters the area of the pressure maintaining auxiliary plate 2 after passing through the teeth of the plurality of internal gear rings 16, the fluid is also gradually pressurized in the tooth grooves of the internal gear ring 16, and the fluid is not instantly converted from low pressure to high pressure rapidly, the phenomenon of steam cavitation can be reduced, the phenomenon of steam cavitation is avoided, the other fluid flows into the gap between the inner side 23 of the first half crescent part and the tooth part of the outer gear shaft 17, a pressurizing effect is gradually generated on the fluid along with the reduction of the gap, the fluid enters the second half crescent part 4 of the pressure maintaining positive plate 1 after passing through 4-5 teeth of the outer gear shaft 17, the fluid is not instantly converted from low pressure to high pressure rapidly, the phenomenon of steam cavitation can be reduced, cavitation is avoided, and the service life of the pressure retainer is prolonged. The first half crescent inner side 23 and the first half crescent outer side 22 are used for providing excellent flow guide for low-pressure fluid, so that the fluid is gradually pressurized.
As shown in fig. 5-8, in the present embodiment, the first elastic sheet 10 abuts against the pressure maintaining sub-sheet 2, the first elastic sheet 10 is preferably a wave spring, the first elastic sheet 10 can provide an elastic force to enable the pressure maintaining sub-sheet 2 to smoothly open when acted by a fluid, the second elastic sheet 11 is preferably a wave spring, wherein the second elastic sheet 11 abuts against the pressure maintaining rod 12, the pressure maintaining rod 12 abuts against the pressure maintaining sub-sheet 2, so that the pressure maintaining rod 12 has an outward supporting effect on the pressure maintaining sub-sheet 2 after receiving the elastic force of the second elastic sheet 11, when the pressure maintaining sub-sheet 2 opens, a gap between the bottom of the accommodating groove 7 and the pressure maintaining sub-sheet 2 forms a pressure guiding cavity 24 (as shown in fig. 8), and a blocking portion 25 (as shown in fig. 7) for blocking the pressure maintaining sub-sheet 2 is formed by a groove wall of the accommodating groove 7 adjacent to the first half crescent 3, when the fluid which has been pressurized to a high pressure enters into the area of the pressure maintaining sub-sheet 2, a portion flows back into the pressure guiding cavity 24, until the high-pressure fluid is blocked by the pressure maintaining rod 12 and then flows out of the pressure guide cavity.
As shown in fig. 7, in the present embodiment, in order to generate a better flow guiding effect, the angle θ of the first tooth end 211It is not suitable to be too large to avoid the generation of eddy current, but if the angle is too small, the angle theta of the first tooth end 21 cannot produce obvious effect1The range is 20-40 degrees. As shown in FIG. 7, in the present embodiment, the end of the second crescent 4 is a second tooth end 26, and the angle θ of the second tooth end 262If too large, turbulence is likely to occur, and the angle θ of the second tooth end 262In the range of 15-35 degrees, and the angle theta of the first tooth end 211Greater than angle theta of second tooth end 262。
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a servo energy-conserving adversion formula gear pump which characterized in that includes:
a pump body;
a front cover arranged at the front end of the pump body and a rear cover arranged at the rear end of the pump body;
the pressure retainer is arranged between the inner gear ring and the outer gear shaft;
the front cover is provided with an oil inlet and an oil inlet channel, the oil inlet is communicated with the outer end face of the front cover, the oil inlet is communicated with the oil inlet channel, the oil inlet channel is communicated with the cavity of the pump body, and the oil inlet channel is used for guiding fluid entering from the oil inlet into the cavity of the pump body in a direction parallel to the axial direction of the external gear shaft;
the rear cover is provided with an oil outlet and an oil outlet channel, the oil outlet is communicated with the outer end face of the rear cover, the oil outlet is communicated with the oil outlet channel, the oil outlet channel is communicated with the cavity of the pump body, and the oil outlet channel is used for guiding high-pressure fluid flowing out of the cavity of the pump body into the oil outlet in a direction parallel to the axial direction of the external gear shaft.
2. The servo energy efficient internal transfer gear pump of claim 1, wherein the pressure holder comprises:
a crescent pressure maintaining positive plate and an arc pressure maintaining auxiliary plate;
the pressure maintaining positive piece comprises a first half crescent part and a second half crescent part;
the peripheral surface of the second half crescent part is provided with a containing groove, the pressure maintaining auxiliary piece is arranged in the containing groove, a pressure guide cavity is formed by a gap between the bottom of the containing groove and the pressure maintaining auxiliary piece, and a blocking part for blocking the pressure maintaining auxiliary piece is formed by the groove wall of the containing groove adjacent to the first half crescent part;
a first elastic sheet groove and a second elastic sheet groove are formed in the bottom of the accommodating groove;
the first elastic piece groove is internally provided with a first elastic piece, the second elastic piece groove is internally provided with a second elastic piece and a pressure maintaining rod, the first elastic piece is abutted to the pressure maintaining auxiliary piece, the second elastic piece is abutted to the pressure maintaining rod, and the pressure maintaining rod is abutted to the pressure maintaining auxiliary piece.
3. The servo energy-saving internal rotation gear pump according to claim 2, wherein two end faces of the pressure maintaining positive plate are respectively provided with an engaging groove, the two engaging grooves are respectively provided with a fixing column, a pressure side plate is arranged between the inner gear ring and the front cover, a pressure side plate is also arranged between the inner gear ring and the rear cover, one end of each fixing column is engaged with the two engaging grooves of the pressure maintaining positive plate, the other end of one fixing column passes through the pressure side plate and then is inserted into one front insertion hole of the front cover, and the other end of the other fixing column passes through the pressure side plate and then is inserted into one rear insertion hole of the rear cover.
4. The servo energy-saving internal-rotation gear pump as claimed in claim 1, wherein the front end and the rear end of the pump body are respectively provided with a positioning column, the positioning column arranged at the front end of the pump body is inserted into the positioning hole of the front cover, and the positioning column arranged at the rear end of the pump body is inserted into the positioning hole of the rear cover.
5. The servo energy-saving internal-rotation gear pump as claimed in claim 2, wherein the end of the first half crescent is a first tooth end, and the angle of the first tooth end is 20-40 degrees.
6. The servo energy-saving internal-rotation gear pump according to claim 5, wherein the end of the second crescent is a second tooth end, the angle of the second tooth end is 15-35 degrees, and the angle of the first tooth end is larger than that of the second tooth end.
7. The servo energy-saving internal-rotation gear pump according to claim 2, wherein the first resilient plate is a wave spring.
8. The servo energy-saving internal-rotation gear pump according to claim 2, wherein the second resilient piece is a wave spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332640.2U CN214145877U (en) | 2020-12-31 | 2020-12-31 | Servo energy-saving internal rotation type gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332640.2U CN214145877U (en) | 2020-12-31 | 2020-12-31 | Servo energy-saving internal rotation type gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214145877U true CN214145877U (en) | 2021-09-07 |
Family
ID=77545459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023332640.2U Active CN214145877U (en) | 2020-12-31 | 2020-12-31 | Servo energy-saving internal rotation type gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214145877U (en) |
-
2020
- 2020-12-31 CN CN202023332640.2U patent/CN214145877U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1234971C (en) | Variable pump | |
| EP2199611B1 (en) | Gear pump with slots in teeth to reduce cavitation | |
| ES2924780B2 (en) | Fluid-to-fluid pressurizer and method of operation thereof | |
| CN106837725B (en) | two-dimensional axial plunger pump | |
| WO2010124541A1 (en) | High-speed large-torque hydraulic blade motor | |
| CN214145877U (en) | Servo energy-saving internal rotation type gear pump | |
| CN112648183A (en) | Side plate for master-slave vane pump and double-acting master-slave vane pump | |
| CN112682304A (en) | Servo energy-saving internal rotation type gear pump | |
| WO2022048364A1 (en) | Pump device and vehicle | |
| CN214145884U (en) | Pressure retainer | |
| CN215633740U (en) | Gear pump casing, gear pump and oil supply system | |
| JP6613222B2 (en) | Vane pump | |
| CN214403902U (en) | Oil suction pipe structure with jet flow structure | |
| CN113757111A (en) | Internal gear pump | |
| CN103782035B (en) | Rotary vane compressor | |
| CN107461367B (en) | Non-contact nano bubble micropump | |
| CN221074614U (en) | Double-suction internal gear pump structure | |
| CN215213912U (en) | Concentric body servo energy-saving high-pressure internal gear pump | |
| JP3900119B2 (en) | Vane pump | |
| CN216589091U (en) | Internal gear pump | |
| CN205478555U (en) | Centrifugal pump side direction formula spiral delivery chamber | |
| CN213745120U (en) | Novel fluid power generation valve | |
| CN213016951U (en) | Pipeline pump with ultra-long service life | |
| CN221003154U (en) | Self-heat-dissipation energy-saving electronic water pump | |
| CN214092299U (en) | Cover plate structure for oil pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |