CN115681778B - Negative pressure pumping device, negative pressure pumping system and centrifugal compressor - Google Patents
Negative pressure pumping device, negative pressure pumping system and centrifugal compressor Download PDFInfo
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- CN115681778B CN115681778B CN202211420553.3A CN202211420553A CN115681778B CN 115681778 B CN115681778 B CN 115681778B CN 202211420553 A CN202211420553 A CN 202211420553A CN 115681778 B CN115681778 B CN 115681778B
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- 238000005086 pumping Methods 0.000 title claims abstract description 54
- 239000012530 fluid Substances 0.000 claims abstract description 84
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 29
- 239000010687 lubricating oil Substances 0.000 abstract description 12
- 230000001050 lubricating effect Effects 0.000 abstract description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of lubricating systems, in particular to a negative pressure pumping device, a negative pressure pumping system and a centrifugal compressor. An apparatus for drawing negative pressure, comprising: the filter structure is arranged in the first accommodating cavity, a first fluid channel is formed between the filter structure and the side wall of the shell, and the first fluid channel is communicated with the second accommodating cavity; the supporting structure is arranged in the accommodating cavity, the filtering structure is arranged on the supporting structure, a second fluid channel is formed between the bottom wall of the supporting structure and the bottom wall of the shell, the second fluid channel and the second accommodating cavity are communicated with the second opening, a third opening used for communicating the first fluid channel with the second fluid channel is formed in the supporting structure, and a fourth opening used for communicating the second accommodating cavity with the second fluid channel is formed in the supporting structure. The invention provides a negative pressure pumping device, a negative pressure pumping system and a centrifugal compressor, which can prevent lubricating oil from entering the negative pressure pumping device along an oil return pipe to a certain extent.
Description
Technical Field
The invention relates to the technical field of lubricating systems, in particular to a negative pressure pumping device, a negative pressure pumping system and a centrifugal compressor.
Background
The efficient operation of mechanical equipment (especially rotor parts thereof) is realized without opening a lubricating system, the lubricating system comprises an oil tank, a lubricating oil way, a valve, an oil pump and other parts, and lubricating oil is supplied to a lubricating point through the lubricating oil way and then flows back to the oil tank. Meanwhile, in order to prevent the lubricating oil from leaking to the outside of the equipment to cause pollution, a negative pressure pumping system is generally arranged, so that pressure difference is formed between the inside and the outside of the equipment. However, the lubricating oil in the negative pressure pumping device needs to be led back to the oil tank by a pipeline, and due to the blocking effect of a filter element in the system, the pressure difference between the pipeline and the oil tank is increased, so that the lubricating oil enters the negative pressure pumping device along the oil return pipe, and the oil injection of the fan is directly caused in severe cases.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that lubricating oil easily flows into the negative pressure pumping device after the negative pressure pumping device in the prior art is used for a period of time to cause oil injection of a fan, and provides the negative pressure pumping device, the negative pressure pumping system and the centrifugal compressor which can prevent the lubricating oil from entering the negative pressure pumping device along an oil return pipe to a certain extent to cause oil injection of the fan.
In order to solve the above technical problem, the present invention provides a negative pressure pumping device, including:
the shell is provided with a first accommodating cavity, a first opening and a second opening, wherein the first opening and the second opening are arranged on the first accommodating cavity, the first opening is suitable for being connected with a negative pressure pumping structure, and the second opening is arranged at the bottom of the first accommodating cavity and is suitable for being connected with a fluid storage tank;
the filter structure is arranged in the first accommodating cavity and provided with a second accommodating cavity, a first fluid channel is formed between the filter structure and the side wall of the shell, and the first fluid channel is communicated with the second accommodating cavity;
the supporting structure is arranged in the first accommodating cavity, the filtering structure is arranged on the supporting structure, a second fluid channel is formed between the bottom wall of the shell and the supporting structure, the second fluid channel is communicated with the second accommodating cavity and the second opening, and the supporting structure is provided with a third opening for communicating the first fluid channel with the second fluid channel and a fourth opening for communicating the second accommodating cavity with the second fluid channel.
Optionally, a one-way valve is provided at the third opening.
Optionally, the first opening is disposed at the top of the first accommodating cavity.
Optionally, a sealing plate is disposed at the top of the filtering structure, and the first opening is disposed in the top center of the first accommodating cavity.
The negative pressure pumping system is provided with the negative pressure pumping device, and further comprises a negative pressure pumping structure connected with the first opening and a fluid storage tank connected with the second opening.
Optionally, the negative pressure pumping structure comprises a first pipeline connected to the first opening, a second pipeline communicated with the outside atmosphere, and a fan for communicating the first pipeline and the second pipeline, a third pipeline is further connected between the first pipeline and the second pipeline, and an adjusting valve is arranged on the third pipeline to introduce the gas in the second pipeline back into the first pipeline and adjust the gas flow.
Optionally, the second opening is connected to the fluid reservoir via a fourth conduit.
The centrifugal compressor is provided with the negative pressure pumping system and further comprises a transmission box body, and the transmission box body is connected with the fluid storage tank through a fifth pipeline.
Optionally, a sixth pipeline is further provided between the transmission case and the fluid storage tank to recover the fluid into the fluid storage tank.
Optionally, the transmission case is a gear box and the fluid storage tank is an oil tank.
The technical scheme of the invention has the following advantages:
1. according to the negative pressure pumping device provided by the invention, the first fluid channel and the second fluid channel which are mutually communicated are arranged in the shell, fluid in the second accommodating cavity of the filtering structure flows back to the fluid storage tank through the fourth opening, the second fluid channel and the second opening, and fluid in the first fluid channel flows back to the fluid storage tank through the third opening, the second fluid channel and the second opening in sequence, so that the filtering effect is improved, the conventional oil return pipe is omitted, and the problem of oil injection of a fan caused by the fact that the fluid enters the negative pressure pumping device along the oil return pipe due to the fact that the pressure difference between the oil return pipe and the interior of the fluid storage tank is large is solved.
2. According to the negative pressure pumping device provided by the invention, the one-way valve at the third opening is arranged, so that the fluid can only enter the second fluid channel from the first fluid channel and then returns to the fluid storage tank, but can not reversely flow, and the problem of fluid backflow is further avoided.
3. According to the negative pressure pumping device provided by the invention, the first opening is formed in the top of the first accommodating cavity, so that fluid flowing out of the second accommodating cavity sequentially flows out through the side wall of the filtering structure, the first fluid channel and the first opening, namely, the fluid uniformly passes through the side wall of the filtering structure in an axial air inlet mode, and the filtering effect is improved.
4. According to the negative pressure pumping system provided by the invention, the third pipeline is connected between the first pipeline and the second pipeline, the regulating valve is arranged on the third pipeline, the flow of the gas flowing out from the second pipeline is regulated through the regulating valve, and then the gas is led back to the first pipeline, so that not only can the negative pressure pumping value of the system be regulated, but also the part of gas is directly led back to the first pipeline through the second pipeline, so that the participation of outside air is not needed, impurities in the outside air are prevented from entering the negative pressure pumping device, and the service life of the negative pressure pumping device is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present 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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a negative pressure pumping device provided by the present invention;
FIG. 2 is a schematic view of a negative pressure pumping system provided by the present invention;
FIG. 3 is a schematic view of a negative pressure pumping arrangement;
FIG. 4 is a schematic view of a centrifugal compressor provided by the present invention;
fig. 5 is a schematic diagram of the operation of the centrifugal compressor.
Description of reference numerals:
1. a housing; 2. a filter structure; 3. a support structure; 4. a first opening; 5. a second opening; 6. a fluid reservoir; 7. a second accommodating chamber; 8. a first fluid channel; 9. closing the plate; 10. mounting a boss; 11. a second fluid passage; 12. a third opening; 13. a fourth opening; 14. a one-way valve; 15. a first pipeline; 16. a second pipeline; 17. a fan; 18. a third pipeline; 19. adjusting a valve; 20. a fourth pipeline; 21. a transmission case; 22. a fifth pipeline; 23. a sixth pipeline.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
One embodiment of the negative pressure pumping device shown in fig. 1 comprises a housing 1, and a filtering structure 2 and a supporting structure 3 which are arranged in the housing 1.
The shell 1 is provided with a first accommodating cavity, a first opening 4 and a second opening 5, wherein the first opening 4 and the second opening 5 are arranged on the first accommodating cavity, the first opening 4 and the second opening 5 are arranged on the axis of the first accommodating cavity, the first opening 4 is arranged in the center of the top of the first accommodating cavity and is suitable for being connected with a negative pressure pumping structure, and the second opening 5 is arranged in the center of the bottom of the first accommodating cavity and is suitable for being connected with a fluid storage tank 6.
The filter structure 2 is arranged in the first accommodating cavity and is provided with a second accommodating cavity 7, preferably a cylindrical structure, and can be a cylindrical filter element in particular, a first fluid channel 8 is formed between the filter structure 2 and the side wall of the housing 1, and the first fluid channel 8 is communicated with the second accommodating cavity 7 in particular through pores on the filter element so as to allow oil mist in the second accommodating cavity 7 to pass through and enter the first fluid channel 8; a sealing plate 9 is provided on the top of the filter structure 2, and the space between the sealing plate 9 and the top wall of the housing 1 is communicated with both the first fluid passage 8 and the first opening 4. The filter structure 2 is arranged coaxially with the housing 1. Of course, the first opening 4 may also be provided on the side wall of the housing 1, in which case the top of the filter structure 2 may be flush with the top of the housing 1, thereby reducing the provision of the closure plate 9.
The supporting structure 3 is a supporting plate arranged in the first accommodating cavity and close to the lower part, a mounting boss 10 is arranged at the corresponding position of the shell 1, and two ends of the supporting plate are inserted into a mounting space of the mounting boss 10 to be fixed. Filtration 2 is located on support structure 3, support structure 3 with form second fluid passage 11 between the diapire of casing 1, second fluid passage 11 with the second holds chamber 7 and second opening 5 and all communicates, just be equipped with on support structure 3 and be used for the intercommunication first fluid passage 8 and second fluid passage 11's third opening 12 to and the intercommunication second holds chamber 7 and second fluid passage 11's fourth opening 13. First opening 4, second opening 5 and the equal coaxial setting of fourth opening 13 can further promote the filter effect, and is specific, and fourth opening 13 is located 2 lower extreme opening centers in filtration, and third opening 12 is located in the backup pad between casing 1 inner wall and the 2 outer walls in filtration, can set up a plurality ofly as required in the backup pad interval. To further avoid backflow, a one-way valve 14 is provided at the third opening 12. The supporting structure 3 and the filtering structure 2 can be integrally processed and formed, so that the connection reliability of the supporting structure and the filtering structure is improved. One embodiment of the negative pressure pumping system shown in fig. 2 and 3, having the negative pressure pumping device, further comprises a negative pressure pumping structure connected to the first opening 4 and a fluid reservoir 6 connected to the second opening 5.
The negative pressure pumping structure comprises a first pipeline 15 connected with the first opening 4, a second pipeline 16 communicated with the outside atmosphere and a fan 17 used for communicating the first pipeline 15 and the second pipeline 16, the fan 17 is installed on one side of the negative pressure pumping device through a connecting plate, a third pipeline 18 is further connected between the first pipeline 15 and the second pipeline 16, and an adjusting valve 19 is arranged on the third pipeline 18 so as to lead gas in the second pipeline 16 back to the first pipeline 15 and adjust the gas flow. The fluid storage tank 6 can be arranged below the negative pressure pumping device, the inlet is connected with the second opening 5 through a fourth pipeline 20, and the other end of the fourth pipeline 20 is connected above the liquid level of the fluid storage tank 6, so that the fluid automatically flows into the fluid storage tank 6 under the action of gravity. In other embodiments, the fluid storage tank 6 may be disposed above the negative pressure pumping device, and the oil may be returned by an oil pump or the like.
One embodiment of a centrifugal compressor, as shown in fig. 4 and 5, with the negative pressure pumping system, further comprises a transmission housing 21, the transmission housing 21 being connected to the fluid reservoir 6 via a fifth pipe 22 and a sixth pipe 23. The transmission case body 21 is a gear case, the fluid storage tank 6 is an oil tank, and the fluid is lubricating oil. An oil pump and a valve are arranged on the fifth pipeline 22 to supply the lubricating oil in the oil tank to a bearing chamber of the transmission case body 21, and one end of the fifth pipeline 22 is connected below the liquid level of the fluid storage tank 6; the lubricating oil supplied to the bearing chamber is returned to the oil tank through a sixth line 23, and one end of the sixth line 23 is connected to the fluid reservoir 6 at a level or higher.
When the centrifugal machine works, under the action of the fan 17, oil mist in the oil tank sequentially enters the filter element through the fourth pipeline 20, the second opening 5, the second fluid channel 11 and the fourth opening 13, after being filtered by the filter element, most of the oil mist is blocked by the filter element and returns to the oil tank through the fourth opening 13, the second fluid channel 11, the second opening 5 and the fourth pipeline 20; the other part of the filter element seeps out of the side wall of the filter element and then is condensed in the first fluid channel 8 and returns to the oil tank through the third opening 12, the second fluid channel 11 and the second opening 5 in sequence. A small part of the remaining oil mist is discharged through the first opening 4, the first pipeline 15 and the second pipeline 16 under the action of the fan 17; meanwhile, part of the gas in the second pipeline 16 flows back to the first pipeline 15 through the third pipeline 18, and the flow of the part of the gas can be adjusted through the adjusting valve 19 on the third pipeline 18, so that the negative pressure value of the fan 17 can be adjusted, and external gas impurities are prevented from entering the system.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An underpressure-pumping device, comprising:
the shell (1) is provided with a first accommodating cavity, and a first opening (4) and a second opening (5) which are arranged on the first accommodating cavity, wherein the first opening (4) is suitable for being connected with a negative pressure pumping structure, and the second opening (5) is arranged at the bottom of the first accommodating cavity and is suitable for being connected with a fluid storage tank (6);
the filter structure (2) is arranged in the first accommodating cavity and is provided with a second accommodating cavity (7), a first fluid channel (8) is formed between the filter structure (2) and the side wall of the shell (1), and the first fluid channel (8) is communicated with the second accommodating cavity (7);
supporting structure (3), locate in the first chamber that holds, filtration (2) are located on supporting structure (3), supporting structure (3) with form second fluid passage (11) between the diapire of casing (1), second fluid passage (11) with the second holds chamber (7) and second opening (5) and all communicates, just be equipped with on supporting structure (3) and be used for the intercommunication third opening (12) of first fluid passage (8) and second fluid passage (11) to and fourth opening (13) that the intercommunication second held chamber (7) and second fluid passage (11).
2. An underpressure-pumping device according to claim 1, characterised in that a non-return valve (14) is provided at the third opening (12).
3. The underpressure-pumping device according to claim 1 or 2, characterized in that the first opening (4) is provided at the top of the first receiving chamber.
4. A device according to claim 3, characterized in that the filter structure (2) is provided with a closing plate (9) at the top, and the first opening (4) is provided at the top center of the first receiving cavity.
5. An underpressure system with an underpressure apparatus according to any of claims 1-4, further comprising an underpressure structure connected to the first opening (4) and a fluid reservoir (6) connected to the second opening (5).
6. The negative pressure pumping system according to claim 5, wherein the negative pressure pumping structure comprises a first pipeline (15) connected with the first opening (4), a second pipeline (16) communicated with the outside atmosphere, and a fan (17) for communicating the first pipeline (15) and the second pipeline (16), a third pipeline (18) is connected between the first pipeline (15) and the second pipeline (16), and a regulating valve (19) is arranged on the third pipeline (18) to introduce the gas in the second pipeline (16) back into the first pipeline (15) and regulate the gas flow.
7. Negative pressure extraction system according to claim 6, characterized in that the second opening (5) is connected to the fluid reservoir (6) by a fourth line (20).
8. Centrifugal compressor, characterized by the fact that it has a negative pressure pumping system according to any of claims 5 to 7, further comprising a transmission box (21), said transmission box (21) being connected to said fluid tank (6) through a fifth conduit (22).
9. A centrifugal compressor according to claim 8, characterized in that a sixth line (23) is provided between the transmission housing (21) and the fluid reservoir (6) for recovering fluid into the fluid reservoir (6).
10. The centrifugal compressor according to claim 8 or 9, wherein the transmission housing (21) is a gear box and the fluid reservoir (6) is an oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211420553.3A CN115681778B (en) | 2022-11-15 | 2022-11-15 | Negative pressure pumping device, negative pressure pumping system and centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211420553.3A CN115681778B (en) | 2022-11-15 | 2022-11-15 | Negative pressure pumping device, negative pressure pumping system and centrifugal compressor |
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| Publication Number | Publication Date |
|---|---|
| CN115681778A CN115681778A (en) | 2023-02-03 |
| CN115681778B true CN115681778B (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211420553.3A Active CN115681778B (en) | 2022-11-15 | 2022-11-15 | Negative pressure pumping device, negative pressure pumping system and centrifugal compressor |
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| CN (1) | CN115681778B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011388A (en) * | 1988-04-28 | 1991-04-30 | Hitachi, Ltd. | Oil-free screw compressor apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202195259U (en) * | 2011-08-09 | 2012-04-18 | 四川省川威集团有限公司 | Device for preventing oil leakage and removing oil mist of machine |
| CN204083758U (en) * | 2014-08-29 | 2015-01-07 | 清远市联升空气液化有限公司 | A kind of large-scale air compressor fuel tank vacuum picking device |
| CN206429841U (en) * | 2017-02-07 | 2017-08-22 | 郑州旭飞光电科技有限公司 | Carry-over pinch rolls lubricating arrangement |
| CN207049088U (en) * | 2017-08-07 | 2018-02-27 | 靖江市红光耐腐设备厂 | A kind of conveying device for doctor solution |
| CN208626921U (en) * | 2018-07-05 | 2019-03-22 | 常州威肯过滤分离环保技术有限公司 | A kind of oil mist separator |
| CN112413093B (en) * | 2021-01-11 | 2022-09-23 | 宁波丰特机械设备有限公司 | Centrifugal compressor gear box negative pressure balance system |
| CN215633940U (en) * | 2021-08-30 | 2022-01-25 | 山东豪迈机械制造有限公司 | Oil return device and compressor |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011388A (en) * | 1988-04-28 | 1991-04-30 | Hitachi, Ltd. | Oil-free screw compressor apparatus |
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| CN115681778A (en) | 2023-02-03 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A negative pressure device, negative pressure system, and centrifugal compressor Granted publication date: 20230310 Pledgee: China Construction Bank Corporation Gaomi sub branch Pledgor: HIMILE MECHANICAL MANUFACTURING Co.,Ltd. Registration number: Y2024980023256 |
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