CN201330724Y - Shaft seal structure for centrifugal compressor - Google Patents
Shaft seal structure for centrifugal compressor Download PDFInfo
- Publication number
- CN201330724Y CN201330724Y CNU2009200002459U CN200920000245U CN201330724Y CN 201330724 Y CN201330724 Y CN 201330724Y CN U2009200002459 U CNU2009200002459 U CN U2009200002459U CN 200920000245 U CN200920000245 U CN 200920000245U CN 201330724 Y CN201330724 Y CN 201330724Y
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- CN
- China
- Prior art keywords
- seal structure
- shaft seal
- centrifugal compressor
- channel
- labyrinth seal
- 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.)
- Expired - Lifetime
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- 230000000694 effects Effects 0.000 abstract description 18
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 12
- 239000006200 vaporizer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model provides a bearing seal structure for centrifugal compressor, include: a labyrinth seal portion that seals a motor bearing of the centrifugal compressor; and a high-pressure introduction part which communicates the turbine part of the centrifugal compressor and the labyrinth seal part. The utility model provides a prior art's labyrinth seal's sealed effect than poor problem, and then reached and prevented the lubricating oil in the motor bearing effectively and flowed into the motor intracavity to reach absolute sealed effect.
Description
Technical field
The utility model relates to refrigerating field, in particular to a kind of shaft seal structure that is used for centrifugal compressor.
Background technique
For semiclosed and totally enclosed centrifugal refigerating compressor; because the leakage of lubricant oil can cause unit to be shut down because of oil starvation; oil leak simultaneously finally can enter vaporizer; and a large amount of lubricant oil enter efficient and the refrigerating capacity that vaporizer can influence unit; so, should avoid oil leak to refrigeration system, to go as far as possible in the inside of compressor.Therefore, must adopt shaft seal structure to prevent oil leak.
The current axis seal structure adopts labyrinth seal and mechanical seal usually.Labyrinth seal is made up of many loculuses that broach separates, and the gas throttling of broach gap to passing through descends the pressure in each chamber gradually, plays the leakproof effect.But in realizing the utility model process, the inventor finds that labyrinth seal is not positive confinement, and sealing effect is poor, and particularly smooth type labyrinth seal effect is poorer.In order to have the better seal effect, can use the more number of teeth, but the number of teeth causes axial dimension long more, and the number of teeth reach some after action effect not obvious.
The model utility content
The utility model aims to provide a kind of shaft seal structure that is used for centrifugal compressor, can solve the poor problem of sealing effect of the labyrinth seal of prior art.
In embodiment of the present utility model, a kind of shaft seal structure that is used for centrifugal compressor is provided, comprising: labyrinth seal portion, the motor bearings of its sealing centrifugal compressor; The high pressure introduction part, it is communicated with the turbine portion and the labyrinth seal portion of centrifugal compressor.
Optionally, in above-mentioned shaft seal structure, the high pressure introduction part comprises: leadout hole is positioned on the volute of turbine portion; First passage is communicated to the cavity of labyrinth seal portion from leadout hole.
Optionally, in above-mentioned shaft seal structure, cavity is a toroidal cavity.
Optionally, in above-mentioned shaft seal structure, flow controller is set on the first passage.
Optionally, in above-mentioned shaft seal structure, the high pressure introduction part also comprises: second channel is communicated to the sidepiece of bearing from leadout hole.
Optionally, in above-mentioned shaft seal structure, flow controller is set on the second channel.
Optionally, in above-mentioned shaft seal structure, the shared portion of channel of second channel and first passage.
Optionally, in above-mentioned shaft seal structure, the high pressure introduction part also comprises: third channel is communicated to the cavity of the motor of centrifugal compressor from leadout hole.
Optionally, in above-mentioned shaft seal structure, flow controller is set on the third channel.
Optionally, in above-mentioned shaft seal structure, the shared portion of channel of third channel and first passage.
Because adopt the high pressure introduction part to be communicated with the turbine portion and the labyrinth seal portion of centrifugal compressor, so solved the poor problem of sealing effect of the labyrinth seal of prior art, and then reached the lubricant oil that stops effectively in the motor bearings and flow in the motor cavity, thereby reach the effect of positive confinement.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the schematic representation according to the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment;
Fig. 2 shows the schematic representation according to the labyrinth seal portion of the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment;
Fig. 3 shows according to one of schematic representation of the air-flow trend of the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment;
Fig. 4 shows according to two of the schematic representation of the air-flow trend of the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 shows the schematic representation according to the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment, Fig. 2 shows the schematic representation according to the labyrinth seal portion of the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment, and Fig. 3 and Fig. 4 show the schematic representation according to the gas flow of the shaft seal structure that is used for centrifugal compressor of the utility model preferred embodiment.
As shown in Figure 1, this shaft seal structure comprises: labyrinth seal portion 1, the motor bearings 4 of its sealing centrifugal compressor; High pressure introduction part 3, it is communicated with the turbine portion 2 and labyrinth seal portion 1 of centrifugal compressor.
The preferred embodiment is because adopt the high pressure introduction part to be communicated with the turbine portion and the labyrinth seal portion of centrifugal compressor, so solved the poor problem of sealing effect of the labyrinth seal of prior art, and then reached the lubricant oil that stops effectively in the motor bearings and flow in the motor cavity, thereby reach the effect of positive confinement.
It is simple that this preferred embodiment has made full use of labyrinth seal structure, is easy to processing, installs, and do not have wearing and tearing, long advantage of life-span, and the sealing effect that has solved labyrinth seal simultaneously is poor, can't realize the shortcoming of positive confinement.
Optionally, as shown in Figure 1 and Figure 4, in above-mentioned shaft seal structure, high pressure introduction part 3 comprises: leadout hole 31 is positioned on the volute 21 of turbine portion 2; First passage 32 is communicated to the cavity 11 of labyrinth seal portion 1 from leadout hole 31.
Optionally, as shown in Figure 4, in above-mentioned shaft seal structure, cavity 11 is a toroidal cavity.
Optionally, as shown in Figure 1, in above-mentioned shaft seal structure, flow controller 35 is set on the first passage 32.Use flow controller on gas circuit, can control the amount of getting gas in the spiral case effectively, windage loss has been avoided in both effectively oil resistances again.
Optionally, as shown in Figure 1 and Figure 4, in above-mentioned shaft seal structure, high pressure introduction part 3 also comprises: second channel 33 is communicated to the sidepiece 41 of motor bearings 4 from leadout hole 31.
Optionally, as shown in Figure 1 and Figure 4, in above-mentioned shaft seal structure, also flow controller can be set on the second channel 33.Use flow controller on gas circuit, can control the amount of getting gas in the spiral case effectively, windage loss has been avoided in both effectively oil resistances again.
Optionally, in above-mentioned shaft seal structure, second channel 33 and first passage 32 shared portion of channel.
Optionally, as shown in Figure 1 and Figure 4, in above-mentioned shaft seal structure, high pressure introduction part 3 also comprises: third channel 34 is communicated to the cavity 5 of the motor of centrifugal compressor from leadout hole 31.
Optionally, in above-mentioned shaft seal structure, also flow controller can be set on the third channel 34.Use flow controller on gas circuit, can control the amount of getting gas in the spiral case effectively, windage loss has been avoided in both effectively oil resistances again.
Optionally, in above-mentioned shaft seal structure, third channel 34 and first passage 32 shared portion of channel.
Also have lubricant oil 7, fuel tank 8 and casing 9 in Fig. 1, as shown in Figure 2, labyrinth seal portion 1 is provided with sealing tooth 12.
In the cooling centrifugal compressor, for lubricated sufficient, the oil pressure of lubricant oil is generally than higher, and the pressure in the motor cavity is more or less the same with pressure in the vaporizer, and therefore, it is interior and enter in the vaporizer that lubricant oil easily leaks to motor cavity.In order to stop lubricant oil 7 to enter motor cavity and then to enter vaporizer, can draw one pressurized gas near a side of motor cavity by the high pressure introduction part at motor bearings, if this pressurized gas air pressure is higher than oil pressure, then can stop oil leak to motor cavity.
The shaft seal structure of this preferred embodiment draws one road pressurized gas from the spiral case of compressor and comes out, through entering the labyrinth seal portion on the motor shaft behind the flow controller, because gas pressure is higher, stops the lubricant oil in the motor bearings to flow in the motor cavity, thereby reach the effect of positive confinement.
The shaft seal structure of this preferred embodiment can also be applied to the motor afterbody, can adopt same scheme to carry out oil resistance, prevents that oil leak is to motor cavity.As shown in Figure 1, air-flow in the first passage continues to flow through forward flow controller 37 according to the indicated direction flow direction motor afterbody of arrow 102, with as stoping according to the pressurized gas in the lubricant oil inflow motor cavity of the indicated direction flow direction motor afterbody of arrow 101.
In centrifugal refigerating compressor, when airflow passes impeller, Diffuser and spiral case, pressure improves constantly.Gas pressure in the spiral case is very high, therefore can draw pressurized gas from spiral case.Because the pressure in the spiral case is higher, therefore throttle orifice is set on gas circuit, the pressure of gas is reduced to a little more than oil pressure.Air-flow after the step-down enters in the labyrinth seal portion.
Labyrinth seal portion adopts a kind of specially-made thin tooth sealing, and its middle part open loop forms cavity.Pressurized gas enter in the toroidal cavity, and air-flow releases from the sealing tooth of cavity both sides, an end oil sealing, and the other end enters motor cavity.
The flow direction of air-flow is shown in the arrow among Fig. 3 and Fig. 4: get out a hole (being above-mentioned leadout hole 31) on spiral case 21, draw high pressure draught from spiral case, airflow passes is installed in throttle orifice (the being above-mentioned flow controller 35) throttling on the gas circuit, pressure reduces the back and flows in the toroidal cavity 11 of labyrinth seal portion 1 by first passage 32, the second channel 33 of leading up to flows to 41 oil resistances of bearing side, and another road flows in the motor cavity 5 by third channel 34.
From as can be seen above-mentioned, air-flow enters labyrinth seal portion and releases from two ends, because the pressure of air-flow is higher, can stop the lubricant oil in the motor bearings to flow in the motor cavity effectively.Thereby reach the effect of positive confinement.Can reduce the leakage of lubricant oil so effectively, guarantee unit operation steady in a long-term, also keep cleaning in the unit vaporizer, unit is efficiently moved.
From above description, as can be seen, the utility model the above embodiments have realized following technique effect: because adopt the high pressure introduction part to be communicated with the turbine portion and the labyrinth seal portion of centrifugal compressor, so solved the poor problem of sealing effect of the labyrinth seal of prior art, and then reached the lubricant oil that stops effectively in the motor bearings and flow in the motor cavity, thereby reach the effect of positive confinement.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a shaft seal structure that is used for centrifugal compressor is characterized in that, comprising: labyrinth seal portion, and it seals the motor bearings of described centrifugal compressor;
The high pressure introduction part, it is communicated with the turbine portion and the described labyrinth seal portion of described centrifugal compressor.
2. shaft seal structure according to claim 1 is characterized in that, described high pressure introduction part comprises:
Leadout hole is positioned on the volute of described turbine portion;
First passage is communicated to the cavity of described labyrinth seal portion from described leadout hole.
3. shaft seal structure according to claim 2 is characterized in that, described cavity is a toroidal cavity.
4 shaft seal structures according to claim 2 is characterized in that, on the described first passage flow controller are set.
5. shaft seal structure according to claim 2 is characterized in that, described high pressure introduction part also comprises:
Second channel is communicated to the sidepiece of described bearing from described leadout hole.
6. shaft seal structure according to claim 5 is characterized in that, on the described second channel flow controller is set.
7. shaft seal structure according to claim 5 is characterized in that, described second channel and the shared portion of channel of described first passage.
8. shaft seal structure according to claim 2 is characterized in that, described high pressure introduction part also comprises:
Third channel is communicated to the cavity of the motor of described centrifugal compressor from described leadout hole.
9. shaft seal structure according to claim 8 is characterized in that, on the described third channel flow controller is set.
10. shaft seal structure according to claim 8 is characterized in that, described third channel and the shared portion of channel of described first passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200002459U CN201330724Y (en) | 2009-01-13 | 2009-01-13 | Shaft seal structure for centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200002459U CN201330724Y (en) | 2009-01-13 | 2009-01-13 | Shaft seal structure for centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330724Y true CN201330724Y (en) | 2009-10-21 |
Family
ID=41224104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200002459U Expired - Lifetime CN201330724Y (en) | 2009-01-13 | 2009-01-13 | Shaft seal structure for centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330724Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016363A (en) * | 2011-09-26 | 2013-04-03 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN103032347A (en) * | 2011-09-28 | 2013-04-10 | 珠海格力电器股份有限公司 | Centrifugal compressor with isolation structure |
| CN103423202A (en) * | 2012-05-16 | 2013-12-04 | 珠海格力电器股份有限公司 | Centrifugal compressor and motor rear end cover thereof |
| WO2020134516A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Shaft seal component, compressor and refrigerant circulation system |
| CN115479035A (en) * | 2022-09-28 | 2022-12-16 | 上海优社动力科技有限公司 | Air sealing device and air compressor |
-
2009
- 2009-01-13 CN CNU2009200002459U patent/CN201330724Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016363A (en) * | 2011-09-26 | 2013-04-03 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN103016363B (en) * | 2011-09-26 | 2016-01-20 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN103032347A (en) * | 2011-09-28 | 2013-04-10 | 珠海格力电器股份有限公司 | Centrifugal compressor with isolation structure |
| CN103032347B (en) * | 2011-09-28 | 2015-08-19 | 珠海格力电器股份有限公司 | Centrifugal compressor with isolation structure |
| CN103423202A (en) * | 2012-05-16 | 2013-12-04 | 珠海格力电器股份有限公司 | Centrifugal compressor and motor rear end cover thereof |
| CN103423202B (en) * | 2012-05-16 | 2015-11-25 | 珠海格力电器股份有限公司 | Centrifugal compressor |
| WO2020134516A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Shaft seal component, compressor and refrigerant circulation system |
| CN115479035A (en) * | 2022-09-28 | 2022-12-16 | 上海优社动力科技有限公司 | Air sealing device and air compressor |
| CN115479035B (en) * | 2022-09-28 | 2023-08-15 | 上海优社动力科技有限公司 | Air sealing device and air compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091021 |