CN115492758A - Oil pump for transformer - Google Patents
Oil pump for transformer Download PDFInfo
- Publication number
- CN115492758A CN115492758A CN202211445197.0A CN202211445197A CN115492758A CN 115492758 A CN115492758 A CN 115492758A CN 202211445197 A CN202211445197 A CN 202211445197A CN 115492758 A CN115492758 A CN 115492758A
- Authority
- CN
- China
- Prior art keywords
- cavity
- motor
- transformer
- oil pump
- block
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 34
- 239000012535 impurity Substances 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an oil pump for a transformer, which relates to the related field of oil-submerged pumps and comprises a main shell, wherein a working cavity is formed in the main shell, oil through ports are symmetrically formed in two sides of the working cavity, the oil through ports on the two sides are respectively an oil inlet and an oil outlet, side cover plates for sealing the working cavity are symmetrically mounted on two sides of the main shell.
Description
Technical Field
The invention relates to the related field of submersible pumps, in particular to an oil pump for a transformer.
Background
The transformer oil pump is large-scale oil-immersed transformer forced oil circulative cooling's power supply, there is three-phase asynchronous motor and pump constitution, when transformer oil pump installation, directly install the oil pump inside transformer oil tank, because transformer internal volume is great, because the oil pump is used for a long time, the inside adhesion that can not avoid having greasy dirt solid impurity of oil pump, the greasy dirt when the inside rotor of oil pump constantly accumulates, can greatly reduce the oil absorption of oil pump and arrange oil efficiency, and can increase the load of motor, when this condition takes place, often need to stop transformer complete machine, take out the oil pump after, tear open the machine again clean, maintainer's work load has greatly been increased, consequently, can have very big demand to the oil pump that a section can carry out the automatically cleaning to oil pump inside in the market.
Disclosure of Invention
The invention aims to provide an oil pump for a transformer, which solves the problems.
The technical purpose of the invention is realized by the following technical scheme: an oil pump for a transformer comprises a main shell, wherein a working cavity is formed in the main shell, oil through ports are symmetrically formed in two sides of the working cavity in a communicated manner, the oil through ports on two sides are respectively an oil inlet and an oil outlet, side cover plates used for sealing the working cavity are symmetrically mounted on two sides of the main shell, a rotating center block is arranged between the side cover plates on the two sides in a rotating manner, a blade cavity circumferentially formed by the rotating center is formed in the rotating center block, a blade plate is arranged in the blade cavity in a sliding fit manner, and a spring is connected between one end of the blade plate and the wall of the blade cavity;
a cleaning cavity is communicated with one side of the working cavity, a scraper is arranged in the cleaning cavity and used for scraping off particle impurities attached to the surface of the rotating center block;
the utility model discloses a scraper cleaning device, including main shell, auxiliary tank, extension intracavity sliding fit, the main shell one side is fixed with auxiliary tank, set up in the auxiliary tank with the extension chamber of clean chamber intercommunication, extension intracavity sliding fit is equipped with the work piece that slides, the inside rotation of work piece that slides installs and is used for the cleanness a clean section of thick bamboo of scraper, set up in the clean section of thick bamboo link up and with the same clean groove of scraper profile.
Preferably, the auxiliary working block is installed on one side of the main shell, a center block is arranged in the middle of the outline of the auxiliary working block, the auxiliary working block is connected with the center block through a metal net, a through center opening cavity is formed in the center block, a sliding block is arranged in the center opening cavity in a sliding fit mode, a screw rod B is arranged between the two end cavity walls of the center opening cavity in a rotating fit mode, and the screw rod B penetrates through the center opening cavity and is in threaded fit.
Preferably, a motor C is installed on the sliding block, a motor shaft of the motor C extends and is fixedly connected with one end of the scraper, a motor B is installed on the center block, and a motor shaft of the motor B is fixedly connected with the screw rod B.
Preferably, the side cover plate close to one side of the auxiliary working block is provided with an open slot, the side cover plate is provided with a connecting shaft in a rotating fit manner, and the connecting shaft is fixedly connected with the rotating center of the rotating center block.
Preferably, the opening of the open slot is accessible for the shaft of the motor C.
Preferably, extend chamber both sides chamber wall and seted up the side spout, the side spout extends to clean intracavity portion, the sliding block both sides are fixed with the side slider, the side slider extends to inside the side spout.
Preferably, a screw rod A is arranged in the cavity wall of the side sliding groove in a rotating fit mode, penetrates through the cleaning groove and is in threaded fit.
Preferably, a motor A is installed on one side of the auxiliary box, and a motor shaft of the motor A is fixedly connected with one end of the screw rod A.
Preferably, the lower end face of the sliding working block can be just matched with the cavity wall of the working cavity.
In conclusion, the invention has the following beneficial effects:
this device is as the dedicated oil pump of transformer, can be at the whole not shut down of transformer, carry out the automatically cleaning under the condition of not tearing open the machine, the inside rotor of oil pump is through special design, match with the scraper outline behind the multistage arc of surface, the scraper can carry out striking off of greasy dirt to the outline, after the scraper is cleaned oil pump inside, the greasy dirt of gathering on with the scraper by clean sleeve is clear away, and in sending the greasy dirt out the device, the very big maintainer that has made things convenient for of this device, can carry out remote control in the transformer outside, avoid the long-time inside greasy dirt gathering of back of using of oil pump and lead to work efficiency's reduction, influence the heat dissipation of inside fluid.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a first perspective view of an embodiment of the present invention;
FIG. 2 is a second perspective view of the present invention;
FIG. 3 is an exploded view of an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a main housing in an embodiment of the invention;
FIG. 5 is a schematic perspective view of a rotation center block and a vane plate according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of a rotation center block according to an embodiment of the present invention;
FIG. 7 is a perspective view of a doctor blade in an embodiment of the invention;
FIG. 8 is a schematic perspective view of a cleaning cartridge in an embodiment of the present invention;
fig. 9 is an internal view of a side cover plate in an embodiment of the present invention.
In the figure: 11. a main housing; 12. a working chamber; 13. an oil through hole; 14. cleaning the cavity; 15. a side cover plate; 16. an open slot; 17. a connecting shaft; 20. rotating the center block; 21. a blade cavity; 22. a vane plate; 23. a spring; 51. an auxiliary tank; 52. an extension cavity; 53. sliding the working block; 54. a cleaning cartridge; 55. cleaning the tank; 56. a side slide; 59. a motor A; 60. a side chute; 61. a screw mandrel A; 70. an auxiliary work block; 71. a center block; 72. a metal mesh; 73. a screw mandrel B; 74. a motor B; 75. a slider; 76. a motor C; 77. a central cavity is opened; 79. and (4) scraping the blade.
Detailed Description
The oil pump for the transformer described in conjunction with fig. 1-9 includes a main housing 11, a working chamber 12 is provided in the main housing 11, oil through ports 13 are symmetrically provided on both sides of the working chamber 12, the oil through ports 13 on both sides are oil inlet and oil outlet respectively, side cover plates 15 for sealing the working chamber 12 are symmetrically installed on both sides of the main housing 11, a rotation center block 20 is rotatably fitted between the side cover plates 15 on both sides, a vane chamber 21 circumferentially provided with a rotation center is provided on the rotation center block 20, a vane plate 22 is slidably fitted in the vane chamber 21, and a spring 23 is connected between one end of the vane plate 22 and the wall of the vane chamber 21;
a cleaning cavity 14 is communicated with one side of the working cavity 12, a scraper 79 is arranged in the cleaning cavity 14, and the scraper 79 is used for scraping off particle impurities attached to the surface of the rotating center block 20;
the utility model discloses a cleaning device, including main shell 11, the extension chamber 52 that communicates with clean chamber 14 has been seted up in the auxiliary tank 51, it is equipped with slide working block 53 to extend intracavity 52 sliding fit, slide working block 53 is inside to be installed in the rotation and be used for the cleanness a clean section of thick bamboo 54 of scraper 79, set up in the clean section of thick bamboo 54 and link up and with the same clean groove 55 of scraper 79 profile.
Beneficially, an auxiliary working block 70 is installed on one side of the main housing 11, a central block 71 is installed in the middle of the outline of the auxiliary working block 70, the auxiliary working block 70 is connected with the central block 71 through a metal mesh 72, a through central open cavity 77 is arranged in the central block 71, a sliding block 75 is arranged in the central open cavity 77 in a sliding fit manner, a lead screw B73 is arranged between the cavity walls at the two ends of the central open cavity 77 in a rotating fit manner, and the lead screw B73 penetrates through the central open cavity 77 and is in threaded fit.
Advantageously, a motor C76 is mounted on the sliding block 75, a motor shaft of the motor C76 extends and is fixedly connected with one end of the scraper 79, a motor B74 is mounted on the central block 71, and a motor shaft of the motor B74 is fixedly connected with the screw rod B73.
Advantageously, an open slot 16 is opened on the side cover plate 15 close to one side of the auxiliary working block 70, a connecting shaft 17 is arranged on the side cover plate 15 in a rotating fit manner, and the connecting shaft 17 is fixedly connected with the rotating center of the rotating center block 20.
Advantageously, the opening of the open slot 16 is accessible for the shaft of the motor C76.
Beneficially, the cavity walls on both sides of the extension cavity 52 are provided with side sliding grooves 60, the side sliding grooves 60 extend into the cleaning cavity 14, side sliding blocks 56 are fixed on both sides of the sliding working block 53, and the side sliding blocks 56 extend into the side sliding grooves 60.
Advantageously, a screw a61 is provided in the cavity wall of the side chute 60 in a rotationally fitting manner, said screw a61 extending through the cleaning slot 55 and being in a threaded fitting.
Advantageously, a motor a59 is installed on one side of the auxiliary box 51, and a motor shaft of the motor a59 is fixedly connected with one end of the screw rod a 61.
Advantageously, the lower end face of the sliding working block 53 can just be matched with the wall of the working chamber 12.
The use method of the invention comprises the following steps:
in the initial state: device integral mounting is inside transformer tank for force the inside fluid circulation of oil tank, play and increase radiating effect, the work piece 53 that slides wholly is located inside clean chamber 14, the terminal surface surrounds into the inside subassembly normal function of circular confession working chamber 12 with working chamber 12 chamber wall under the work piece 53 that slides, scraper 79 is located inside clean groove 55, motor C76 is in apart from open slot 16 at the farthest, one side and the driving motor of connecting axle 17 are connected, the device can normally work as the impeller pump this moment.
After this device used a period, because the inside fluid of transformer strikes and contacts the surface of rotation centre piece 20 for a long time, the inside solid impurity of fluid can the adhesion on the surface of rotation centre piece 20, to the holistic oil absorption of device, arrange oil efficiency and cause the influence, and the motor that connecting axle 17 is connected opens external control and closes down this moment, and the device starts clean function.
The motor A59 is started, the motor A59 drives the screw rod A61 to rotate forwardly through the motor shaft, the lower side sliding block 56 is driven by the screw rod A61 to drive the whole sliding working block 53 to move towards the direction far away from the auxiliary working block 70, the cleaning cylinder 54 also moves together with the sliding working block 53, the sliding working block 53 leaves the upper part of the working cavity 12, and after the sliding working block 53 completely enters the extension cavity 52, the motor A59 is closed;
the motor C76 starts to rotate forwards, the motor shaft of the motor C76 drives the scraper 79 to rotate, the motor B74 starts, the motor B74 drives the screw rod B73 to rotate forwards, the sliding block 75 descends along the central open cavity 77 under the forward rotation of the screw rod B73 until the sliding block descends to a limit position, the motor B74 is turned off, the scraper 79 just fits with the outline of the rotating central block 20 at the moment, the rotating scraper 79 scrapes solid impurities adhered to the surface of the rotating central block 20, after the surface cleaning of one place is completed, the motor B74 starts to rotate backwards, the scraper 79 is lifted through the rotation of the screw rod B73, after the scraper 79 returns to the cleaning cavity 14 again, the driving motor externally connected with the connecting shaft 17 starts to drive the rotating central block 20 to rotate for a certain angle and then to be turned off again, the scraper 79 descends again to clean the outline of the rotating central block 20, and the steps are repeated until the surface cleaning of the rotating central block 20 is completed.
When the surface contour of the rotating center block 20 is completely cleaned, the center open cavity 77 enters the cleaning cavity 14 again, the motor a59 starts to rotate reversely, the motor a59 drives the screw rod a61 to rotate reversely, so that the sliding working block 53 enters the cleaning cavity 14 again, in the process, the cleaning cylinder 54 wraps the scraper 79 again, and the cleaning groove 55 scrapes away oil dirt impurities on the surface of the scraper 79;
when the cleaning cylinder 54 returns to the initial position, the oil dirt on the surface of the scraper 79 is completely scraped by the cleaning cylinder 54, the oil dirt is gathered at one end of the cleaning cylinder 54, at this time, one end of the cleaning cylinder 54 is attached to the metal mesh 72, at this time, the motor C76 is started again, the motor C76 drives the scraper 79 to rotate through the motor shaft, the scraper 79 drives the cleaning cylinder 54 to rotate, and the side, where the oil dirt is gathered, of the rotating cleaning cylinder 54 is scraped with the metal mesh 72 to rub the oil dirt and fall out of the device.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides an oil pump for transformer, includes main casing, its characterized in that: a working cavity is formed in the main shell, oil through holes are symmetrically formed in two sides of the working cavity in a communicated mode, the oil through holes in the two sides are respectively an oil inlet and an oil outlet, side cover plates used for sealing the working cavity are symmetrically mounted on two sides of the main shell, a rotating center block is matched between the side cover plates in the two sides in a rotating mode, a blade cavity formed in the circumferential direction of the rotating center is formed in the rotating center block, a blade plate is arranged in the blade cavity in a sliding fit mode, and a spring is connected between one end of the blade plate and the wall of the blade cavity;
a cleaning cavity is communicated with one side of the working cavity, a scraper is arranged in the cleaning cavity and used for scraping off particle impurities attached to the surface of the rotating center block;
the utility model discloses a scraper cleaning device, including main shell, auxiliary tank, extension intracavity sliding fit, the main shell one side is fixed with auxiliary tank, set up in the auxiliary tank with the extension chamber of clean chamber intercommunication, extension intracavity sliding fit is equipped with the work piece that slides, the inside rotation of work piece that slides installs and is used for the cleanness a clean section of thick bamboo of scraper, set up in the clean section of thick bamboo link up and with the same clean groove of scraper profile.
2. The oil pump for a transformer as claimed in claim 1, wherein: the utility model discloses a portable electronic device, including main shell, supplementary work piece, metal mesh, slide block, lead screw B runs through the center is opened chamber and screw-thread fit between the chamber wall at chamber both ends.
3. The oil pump for a transformer as claimed in claim 2, wherein: the scraper is characterized in that a motor C is installed on the sliding block, a motor shaft of the motor C extends and is fixedly connected with one end of the scraper, a motor B is installed on the center block, and a motor shaft of the motor B is fixedly connected with the screw rod B.
4. An oil pump for a transformer as claimed in claim 3, wherein: the side cover plate is close to one side of the auxiliary working block, an open slot is formed in the side cover plate, a connecting shaft is arranged on the side cover plate in a rotating fit mode, and the connecting shaft is fixedly connected with the rotating center of the rotating center block.
5. The oil pump for a transformer as set forth in claim 4, wherein: the opening of the open slot can be used for the shaft of the motor C to enter.
6. The oil pump for a transformer as claimed in claim 1, wherein: side sliding grooves are formed in the wall of the two side cavities of the extension cavity and extend to the inside of the cleaning cavity, side sliding blocks are fixed to the two sides of the sliding working block and extend to the inside of the side sliding grooves.
7. The oil pump for a transformer as claimed in claim 6, wherein: and a screw rod A is arranged in the cavity wall of the side sliding groove in a rotating fit manner, penetrates through the cleaning groove and is in threaded fit.
8. The oil pump for a transformer as claimed in claim 7, wherein: and a motor A is installed on one side of the auxiliary box, and a motor shaft of the motor A is fixedly connected with one end of the screw rod A.
9. The oil pump for a transformer as claimed in claim 1, wherein: the lower end face of the sliding working block can be just matched with the cavity wall of the working cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211445197.0A CN115492758B (en) | 2022-11-18 | 2022-11-18 | Oil pump for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211445197.0A CN115492758B (en) | 2022-11-18 | 2022-11-18 | Oil pump for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115492758A true CN115492758A (en) | 2022-12-20 |
| CN115492758B CN115492758B (en) | 2023-02-03 |
Family
ID=85105970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211445197.0A Active CN115492758B (en) | 2022-11-18 | 2022-11-18 | Oil pump for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115492758B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985000637A1 (en) * | 1983-07-15 | 1985-02-14 | Jimmie Wesley Patterson | Lobular type rotary pump |
| CN105484995A (en) * | 2015-12-22 | 2016-04-13 | 西安石油大学 | Vortex self-cleaning oil well pump |
| CN112431826A (en) * | 2020-12-03 | 2021-03-02 | 平潭县偏江科技有限公司 | Hydraulic press capable of dissipating heat and automatically supplementing oil |
| CN214331025U (en) * | 2021-03-23 | 2021-10-01 | 烟台比吉流体控制技术有限公司 | Self-cleaning oil tank for hydraulic system |
| CN215370268U (en) * | 2021-06-11 | 2021-12-31 | 上海威营流体设备有限公司 | Self-cleaning mechanism in submersible sewage pump |
| CN216342792U (en) * | 2021-10-21 | 2022-04-19 | 安庆乾富科技有限公司 | Screw compressor spiral rotor greasy dirt clearing device |
-
2022
- 2022-11-18 CN CN202211445197.0A patent/CN115492758B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985000637A1 (en) * | 1983-07-15 | 1985-02-14 | Jimmie Wesley Patterson | Lobular type rotary pump |
| CN105484995A (en) * | 2015-12-22 | 2016-04-13 | 西安石油大学 | Vortex self-cleaning oil well pump |
| CN112431826A (en) * | 2020-12-03 | 2021-03-02 | 平潭县偏江科技有限公司 | Hydraulic press capable of dissipating heat and automatically supplementing oil |
| CN214331025U (en) * | 2021-03-23 | 2021-10-01 | 烟台比吉流体控制技术有限公司 | Self-cleaning oil tank for hydraulic system |
| CN215370268U (en) * | 2021-06-11 | 2021-12-31 | 上海威营流体设备有限公司 | Self-cleaning mechanism in submersible sewage pump |
| CN216342792U (en) * | 2021-10-21 | 2022-04-19 | 安庆乾富科技有限公司 | Screw compressor spiral rotor greasy dirt clearing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115492758B (en) | 2023-02-03 |
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