CN111927793B - Centrifugal compressor balance pipe assembly, centrifugal compressor and refrigerating system - Google Patents
Centrifugal compressor balance pipe assembly, centrifugal compressor and refrigerating system Download PDFInfo
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- CN111927793B CN111927793B CN202010542996.4A CN202010542996A CN111927793B CN 111927793 B CN111927793 B CN 111927793B CN 202010542996 A CN202010542996 A CN 202010542996A CN 111927793 B CN111927793 B CN 111927793B
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- centrifugal compressor
- pipe
- oil tank
- port
- pressure
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- 239000007788 liquid Substances 0.000 claims description 23
- 238000005057 refrigeration Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 70
- 239000003507 refrigerant Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000035553 feeding performance Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application provides a centrifugal compressor balancing pipe subassembly, centrifugal compressor and refrigerating system. The centrifugal compressor balance pipe assembly comprises a first pipe fitting, a second pipe fitting and a third pipe fitting, wherein the first pipe fitting is communicated between an air suction port and an oil tank of a centrifugal compressor; and the second pipe fitting comprises a first port and a second port, the first port is communicated with the air suction port, and the second port is communicated with the box body of the centrifugal compressor. When the exhaust pressure of the centrifugal compressor is higher, the pressure can be released to the air suction port through the second pipe fitting as soon as possible, and the pressure in the oil tank is balanced better and faster, so that the problem of oil leakage in a traditional balance pipe caused by the operation of the compressor is prevented, and the operation reliability of the centrifugal compressor is improved.
Description
Technical Field
The application belongs to the technical field of centrifugal compressors, and particularly relates to a centrifugal compressor balance pipe assembly, a centrifugal compressor and a refrigerating system.
Background
In large commercial or industrial fields, there are many places where centrifugal compressor devices are selected for refrigeration, and with the development of centrifugal compressor devices, high-temperature heat pump centrifugal compressors are increasingly applied in some large industrial fields, such as some industrial fields of steel mills, oil fields and the like. Generally, in the case of a centrifugal compressor device using oil lubrication, the pressure in the oil tank increases with the pressure leaked from the discharge side, and in order to prevent the oil tank pressure from being too high and affecting the oil supply performance and operational reliability of the oil pump, a balance pipe structure for balancing the pressure in the oil tank is provided between the oil tank and the low pressure region of the centrifugal compressor.
Considering the convenience of later maintenance of the centrifugal compressor device, more and more centrifugal compressor devices adopt the structure of the external oil tank, namely the centrifugal compressor and the oil tank are installed on the centrifugal compressor device as two independent components, and particularly for a high-temperature heat pump centrifugal compressor unit with high refrigerating capacity, the structural advantage of the external oil tank becomes more obvious due to the model with high difficulty in after-sale maintenance. Generally, the balance tube structure of the centrifugal compressor device is that a balance tube is arranged between an oil tank and a suction port of the centrifugal compressor, and is used for balancing high-pressure refrigerant gas entering the oil tank in a compressor box body.
The existing balance tube structure is generally a connection mode that an oil tank is directly communicated with an air suction port of a centrifugal compressor, as shown in figure 1, a straight-through tube 5 is arranged between the air suction port 1 and an oil tank 4 of the centrifugal compressor, and the exhaust pressure is not too high for the common centrifugal compressor for cooling and heating, so that the mode can achieve a better pressure balance effect. However, for a high-temperature heat pump centrifugal compressor unit, because the outlet water temperature required by the working condition is very high, the exhaust pressure of the centrifugal compressor is also very high, which is several times of the ordinary refrigeration or heating pressure, the simple through connection mode is difficult to meet the effect of balancing pressure, the pressure in the oil tank is still higher, so that the oil supply performance and the operation reliability of an oil pump are poor, the problem of oil leakage in a balancing pipe is caused by large pressure difference, and the operation reliability of the centrifugal compressor is further influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the present application is to provide a centrifugal compressor balance tube assembly, a centrifugal compressor and a refrigeration system, which can perform a pressure balancing function on a centrifugal compressor with a high exhaust pressure.
In order to solve the above problems, the present application provides a centrifugal compressor balance pipe assembly, comprising:
the first pipe fitting is communicated between an air suction port of the centrifugal compressor and the oil tank;
and the second pipe fitting comprises a first port and a second port, the first port is communicated with the air suction port, and the second port is communicated with the box body of the centrifugal compressor.
Preferably, a plurality of air outlets are arranged on the oil tank and are communicated with the air suction port through the first pipe fitting.
Preferably, the box body is provided with a plurality of air outlets which are communicated with the air suction port through the second pipe fitting.
Preferably, the first pipe member and the second pipe member are integrally formed.
Preferably, the first and second pipe fittings are of a three-way pipe structure.
Preferably, the tank body comprises a second gas-liquid separator, and the second port is communicated with an air outlet of the second gas-liquid separator.
Preferably, the oil tank comprises a first gas-liquid separator, and the first gas-liquid separator is provided with a plurality of air outlets communicated with the air suction port.
According to another aspect of the present application, there is provided a centrifugal compressor comprising a centrifugal compressor balance tube assembly as described above.
According to yet another aspect of the present application, there is provided a refrigeration system comprising a centrifugal compressor balance tube assembly as described above or a centrifugal compressor as described above.
The application provides a centrifugal compressor balance tube subassembly includes: the first pipe fitting is communicated between an air suction port of the centrifugal compressor and the oil tank; and the second pipe fitting comprises a first port and a second port, the first port is communicated with the air suction port, and the second port is communicated with the box body of the centrifugal compressor. When the exhaust pressure of the centrifugal compressor is higher, the pressure can be released to the air suction port through the second pipe fitting as soon as possible, and the pressure in the oil tank is balanced better and faster, so that the problem of oil leakage in a traditional balance pipe caused by the operation of the compressor is prevented, and the operation reliability of the centrifugal compressor is improved.
Drawings
FIG. 1 is a schematic view of a flow-through balance tube structure of a conventional centrifugal compressor;
fig. 2 is a schematic structural diagram of a centrifugal compressor balance tube assembly according to an embodiment of the present application.
The reference numerals are represented as:
1. an air suction port; 2. a box body; 21. a second gas-liquid separator; 3. a motor, 4 and an oil tank; 41. a first gas-liquid separator; 5. a straight-through pipe; 6. an oil supply line; 7. a second pipe.
Detailed Description
Referring collectively to fig. 2, in accordance with an embodiment of the present application, a centrifugal compressor balance tube assembly includes:
the first pipe fitting is communicated between the centrifugal compressor air suction port 1 and the oil tank 4;
and the second pipe fitting 7 comprises a first port and a second port, the first port is communicated with the suction port 1, and the second port is communicated with the box body 2 of the centrifugal compressor.
The first pipe fitting is a straight pipe 5 in the balance pipe structure of the traditional centrifugal compressor and can play a role in communicating an air suction port 1 of the centrifugal compressor with an oil tank 4; the second pipe fitting 7 that this application was add communicates centrifugal compressor's induction port 1 and box 2, and under the very high condition of centrifugal compressor exhaust pressure appeared, the gaseous pressure of refrigerant that the exhaust side leaked to in the box 2 is also very high, consequently accessible second pipe fitting 7 realizes balanced pressure's effect, avoids the too high entering oil tank 4 along with oil supply pipeline 6 of pressure, and influences the fuel feeding performance and lead to compressor operational reliability variation.
In some embodiments, the oil tank 4 is provided with a plurality of air outlets, and all the air outlets are communicated with the air suction port 1 through the first pipe fitting.
Connect to induction port 1 through multichannel gas outlet, for set up a gas outlet on the oil tank 4, can more fast and effectual balance the pressure of oil tank 4, guarantee that 4 pressure of oil tank maintain in suitable within range, and then improve centrifuge operation's reliability.
In some embodiments, the housing 2 is provided with a plurality of air outlets, which are all communicated with the air suction port 1 through the second pipe 7.
Set up the gas outlet of multichannel connection to induction port 1 on through box 2, for set up a gas outlet on box 2, can be more quick and effectual balance the pressure of oil tank 4, guarantee that 4 pressures of oil tank maintain in suitable within range, and then improve centrifuge operation's reliability.
In some embodiments, the first tube member and said second tube member 7 are integrally formed.
As shown in fig. 2, the straight pipe 5 as the first pipe and the second pipe 7 can form an integrally formed three-way pipe, and three ports are respectively connected with the tank body 2, the air suction port 1 and the oil tank 4, so as to achieve the purpose of pressure balancing. And an integrally formed structure is adopted, so that the material and the installation space are saved.
In some embodiments, the tank 2 comprises a second gas-liquid separator 21, and the second port communicates with an air outlet of the second gas-liquid separator 21.
The second gas-liquid separator 21 is arranged in the box body 2, so that the liquid phase contained in the high-pressure gas discharged to the second port from the box body 2 can be separated, and the liquid phase is prevented from entering the air suction port 1 and generating liquid impact.
In some embodiments, the oil tank 4 includes a first gas-liquid separator 41, and the first gas-liquid separator 41 is provided with a plurality of air outlets communicated with the suction port.
The first gas-liquid separator 41 is provided in the oil tank 4 to ensure separation of the liquid phase contained in the gas phase discharged from the oil tank 4, thereby avoiding occurrence of liquid slugging.
According to another embodiment of the present application, there is provided a centrifugal compressor comprising a centrifugal compressor balance tube assembly as described above.
Adopt above-mentioned centrifugal compressor balance tube subassembly, utilize two ways to carry out balanced mode simultaneously for the high-pressure refrigerant gas that the compressor discharge side leaked to box 2 obtains balancing better faster, thereby the pressure in the balanced oil tank 4 that can be better, prevents that centrifuge from moving because oil tank 4 high pressure leads to oil pump fuel feeding performance and operational reliability variation, and the big problem that causes the oil leakage in the balance tube of pressure difference, guarantees centrifuge's operational reliability.
The specific structure of the centrifugal compressor comprises an air suction port 1, a box body 2, a motor 3 and an oil tank 4, wherein the oil tank 4 is connected with the compressor box body 2 through an oil supply pipeline 6 to complete circulation of oil supply and oil return; the oil tank 4 is connected with the air suction port 1 through a straight pipe 5, so that the pressure of the oil tank 4 is balanced. The straight pipe 5 and the second pipe fitting 7 form a three-way pipe structure, two ports of the three-way pipe are connected with the oil tank 4 and the air suction port 1, and the last port is communicated with the box body 2, so that pressure balance among the air suction port 1, the oil tank 4 and the box body 2 is realized through the three-way pipe.
The working principle of the centrifugal compressor is as follows:
under the working condition of general refrigeration, the exhaust pressure of the centrifugal compressor is not too high, at the moment, high-pressure refrigerant gas leaked from the exhaust side into the tank body 2 enters the oil tank 4 along the oil supply pipeline 6, and if the high-pressure refrigerant gas is not balanced, the high-pressure refrigerant gas can only return to the tank body 2 along the oil supply pipeline 6 after entering the oil tank 4, so that the pressure of the whole system is higher and higher. Therefore, the straight-through pipe 5 is adopted to balance the pressure in the oil tank 4, so that the pressure in the oil tank 4 slowly decreases after passing through the first gas-liquid separator 41 and the straight-through pipe 5 and enters the air suction port 1, the first gas-liquid separator 41 has the effect of separating refrigerant gas from lubricating oil, the refrigerant gas is ensured to be the most part of the refrigerant gas entering the air suction port 1, and the lubricating oil is mostly flowed back to the oil tank 4, thereby avoiding the oil leakage problem.
When the centrifugal compressor runs under the working condition that the exhaust pressure of a high-temperature heat pump and the like is very high, the exhaust pressure at the moment is several times that under the normal refrigeration working condition, the pressure of refrigerant gas leaked from the exhaust side into the box body 2 is also very high, and the effect of balancing the pressure is difficult to achieve by singly passing through a balancing pipe between the oil tank 4 and the air suction port 1. Therefore, the oil tank 4, the tank 2 and the suction port 1 are connected at the same time by the tee pipe, so that the high-pressure refrigerant gas in the tank 2 can be reduced in pressure by the second gas-liquid separator 21 and the tee pipe, and the second gas-liquid separator 21 can also separate the refrigerant gas from the lubricating oil. Meanwhile, the pressure in the oil tank 4 is balanced synchronously through the first gas-liquid separator 41 and the three-way pipe, so that the pressure balance requirement of the oil tank 4 of the high-temperature heat pump centrifuge can be met by two ways of pressure balancing simultaneously, the problems that the oil supply performance and the operation reliability of the oil pump are poor due to overhigh pressure of the oil tank 4 and oil leakage in a balance pipe is caused by large pressure difference during operation are prevented, and the operation reliability of the centrifuge is ensured.
In practical use, the pressure balancing effect can also be achieved by optionally arranging a control valve on the through pipe 5 and/or the second pipe member 7.
According to yet another aspect of the present application, there is provided a refrigeration system comprising a centrifugal compressor balance tube assembly as described above or a centrifugal compressor as described above.
The centrifugal compressor balance pipe assembly or the centrifugal compressor is adopted in the refrigeration system, so that the service life of the refrigeration system can be prolonged, and faults are reduced.
It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (7)
1. A centrifugal compressor balance tube assembly, comprising:
the first pipe fitting is communicated between an air suction port (1) and an oil tank (4) of the centrifugal compressor;
a second pipe (7) comprising a first port communicating with said suction port (1) and a second port communicating with the tank (2) of said centrifugal compressor;
the first pipe fitting and the second pipe fitting (7) are integrally formed;
the first pipe fitting and the second pipe fitting (7) are of a three-way pipe structure.
2. The balancing pipe assembly of a centrifugal compressor according to claim 1, characterized in that the oil tank (4) is provided with a plurality of air outlets, each communicating with the suction port (1) through the first pipe member.
3. Balancing tube assembly according to claim 1 or 2, characterised in that the tank (2) is provided with a plurality of outlet openings, each communicating with the suction opening (1) through the second tube (7).
4. The centrifugal compressor balance tube assembly according to claim 1, wherein the tank (2) comprises a second gas-liquid separator (21), and the second port communicates with an air outlet of the second gas-liquid separator (21).
5. The centrifugal compressor balance tube assembly according to claim 1, wherein the oil tank (4) comprises a first gas-liquid separator (41), and the first gas-liquid separator (41) is provided with a plurality of air outlets communicated with the air suction port (1).
6. A centrifugal compressor comprising a centrifugal compressor balance tube assembly according to any one of claims 1 to 5.
7. A refrigeration system comprising a centrifugal compressor balance tube assembly according to any one of claims 1 to 5 or a centrifugal compressor according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010542996.4A CN111927793B (en) | 2020-06-15 | 2020-06-15 | Centrifugal compressor balance pipe assembly, centrifugal compressor and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010542996.4A CN111927793B (en) | 2020-06-15 | 2020-06-15 | Centrifugal compressor balance pipe assembly, centrifugal compressor and refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111927793A CN111927793A (en) | 2020-11-13 |
| CN111927793B true CN111927793B (en) | 2021-08-10 |
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| CN202010542996.4A Active CN111927793B (en) | 2020-06-15 | 2020-06-15 | Centrifugal compressor balance pipe assembly, centrifugal compressor and refrigerating system |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6056270B2 (en) * | 2012-08-28 | 2017-01-11 | ダイキン工業株式会社 | Turbo compressor and turbo refrigerator |
| CN102997522B (en) * | 2012-11-26 | 2015-05-27 | 浙江盾安人工环境股份有限公司 | Centrifugal refrigerating compressor, and oil separation system and oil separation method for centrifugal refrigerating compressor |
| JP6799792B2 (en) * | 2017-02-23 | 2020-12-16 | パナソニックＩｐマネジメント株式会社 | Fluid machinery and refrigeration cycle equipment |
| JP2018169059A (en) * | 2017-03-29 | 2018-11-01 | 三菱重工サーマルシステムズ株式会社 | refrigerator |
| CN111076438A (en) * | 2019-12-11 | 2020-04-28 | 珠海格力电器股份有限公司 | Compressor and air conditioner with same |
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Effective date of registration: 20210308 Address after: 519070 9 Building (Science and technology building) 789 Jinji Road, Qianshan, Zhuhai, Guangdong Applicant after: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI Address before: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Applicant before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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