CN111878447A - Compressor with good sealing effect and fuel cell air compressor - Google Patents
Compressor with good sealing effect and fuel cell air compressor Download PDFInfo
- Publication number
- CN111878447A CN111878447A CN202010581066.XA CN202010581066A CN111878447A CN 111878447 A CN111878447 A CN 111878447A CN 202010581066 A CN202010581066 A CN 202010581066A CN 111878447 A CN111878447 A CN 111878447A
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- China
- Prior art keywords
- compressor
- impeller
- diffuser
- broach
- main shaft
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- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 230000000694 effects Effects 0.000 title abstract description 20
- 244000126211 Hericium coralloides Species 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 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
- 230000003313 weakening effect Effects 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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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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
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Abstract
The invention provides a compressor with good sealing effect and a fuel cell air compressor. The compressor comprises a main shaft, an impeller and a diffuser, wherein the impeller and the diffuser are arranged on the main shaft, and a first air passing gap is formed between the impeller and the diffuser. The compressor with good sealing effect and the fuel cell air compressor provided by the invention have the advantages that the comb tooth sealing structure is arranged between the diffuser and the impeller, the double sealing effect is realized, the problem of insufficient size on a shaft system in the prior art is solved, the comb tooth is designed to gradually reduce the cross section, so that the flow velocity stagnation effect is more obvious by increasing the sudden change of the airflow flow area, the effect of reducing the leakage loss of the air compressor is fully exerted, the cross section of the comb tooth is set into a right trapezoid, the incoming airflow pressure is weakened by utilizing the inclined angle of the inclined edge, the pressure difference at two sides of the comb tooth is balanced as much as possible, the possibility of gas leakage from the air passing channel is further reduced, and the leakage demand of the fuel cell air compressor is.
Description
Technical Field
The invention relates to the technical field of air compression equipment, in particular to a compressor with good sealing effect and a fuel cell air compressor.
Background
In the working process, the air compressor does work on the air by means of the impeller, unnecessary leakage is prevented in the air compression process, and the internal sealing of the air compressor is a means which is relatively wide in application. In the existing air compressor, the sealing among all areas on a shaft system is realized by using parts of a radial sealing structure, and basically, the radial sealing structure is formed by uniformly arranging and distributing comb teeth, but for the fuel cell air compressor, due to the structural limitation of weight and axial size, the shaft system cannot provide enough axial space for the distribution of the comb teeth, so that the requirement of discharge capacity cannot be met, and the improvement of the efficiency and performance of the fuel cell air compressor is limited.
Disclosure of Invention
In order to solve the technical problem that efficiency and performance cannot be improved due to the fact that shafting comb teeth of a fuel cell air compressor cannot meet leakage requirements in the prior art, the compressor with good sealing effect and the fuel cell air compressor are provided, and radial sealing is increased and air pressure is weakened.
The utility model provides a compressor, includes main shaft, impeller and diffuser, the impeller with the diffuser all set up in on the main shaft, the impeller with be formed with first gas gap between the diffuser, the diffuser with be formed with the second gas gap between the main shaft, first gas gap with the second gas gap intercommunication forms the gas channel, first gas gap department with gas gap department all is provided with broach seal structure.
The comb tooth sealing structure comprises a plurality of comb teeth which are arranged in parallel, and the tooth depth of all the comb teeth is gradually reduced along the direction from the high-pressure side of the air passing channel to the low-pressure side of the air passing channel.
The cross-section of broach is right trapezoid, right trapezoid's upper base is located the bottom of broach, just right trapezoid's hypotenuse is towards the high pressure side of air channel.
The angle range of the bottom angle of the right trapezoid is 45-80 degrees.
The broach seal structure includes first broach seal structure and second broach seal structure, the first terminal surface of diffuser with form between the impeller first air gap, the internal surface of diffuser with form between the week side of main shaft the air gap is crossed to the second, first broach seal structure set up in on the first terminal surface, just all in the first broach seal structure the tooth depth of broach is along keeping away from the direction of main shaft increases gradually, second broach seal structure set up in on the internal surface, all in the second broach seal structure the tooth depth of broach is along keeping away from the direction of impeller reduces gradually.
The size from the first comb tooth sealing structure to the edge of the impeller is larger than or equal to 5 mm.
The range of the size difference of the tooth depths of two adjacent comb teeth is 0.1-0.4 mm.
The distance between two adjacent comb teeth ranges from 0.4mm to 1.2 mm.
The number of the comb teeth is at least 6.
The end face of the first comb tooth sealing structure facing the impeller is matched with the end face of the impeller facing the diffuser.
A fuel cell air compressor comprises the compressor.
The compressor with good sealing effect and the fuel cell air compressor provided by the invention have the advantages that the comb tooth sealing structure is arranged between the diffuser and the impeller, the double sealing effect is realized, the problem of insufficient size on a shaft system in the prior art is solved, the comb tooth is designed to gradually reduce the cross section, so that the flow velocity stagnation effect is more obvious by increasing the sudden change of the airflow flow area, the effect of reducing the leakage loss of the air compressor is fully exerted, the cross section of the comb tooth is set into a right trapezoid, the incoming airflow pressure is weakened by utilizing the inclined angle of the inclined edge, the pressure difference at two sides of the comb tooth is balanced as much as possible, the possibility of gas leakage from the air passing channel is further reduced, and the leakage demand of the fuel cell air compressor is.
Drawings
Fig. 1 is a schematic structural diagram of a compressor and a fuel cell air compressor according to an embodiment of the present invention;
in the figure:
1. a main shaft; 2. an impeller; 3. a diffuser; 11. a first air passing gap; 12. a second air passing gap; 4. a first comb tooth sealing structure; 5. and the second comb tooth sealing structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The compressor shown in fig. 1 includes a main shaft 1, an impeller 2 and a diffuser 3, wherein the impeller 2 and the diffuser 3 are both disposed on the main shaft 1, a first air passing gap 11 is formed between the impeller 2 and the diffuser 3, a second air passing gap 12 is formed between the diffuser 3 and the main shaft 1, the first air passing gap 11 and the second air passing gap 12 are communicated to form an air passing passage, comb tooth sealing structures are disposed at the first air passing gap 11 and the second air passing gap 12, the first air passing gap 11 and the second air passing gap 12 both form a gas leakage position of the compressor and are finally communicated to form an air passing passage for gas leakage, the conventional compressor is only provided with a comb tooth sealing structure between the main shaft 1 and the diffuser 3, that is, the comb tooth sealing structure is disposed at the second air passing gap 12 only, there is the low problem of sealed effect, and this application is for increasing sealed effect, the broach seal structure has additionally been set up between impeller 2 and diffuser 3, also has also set up broach seal structure in first gas clearance 11 department promptly, utilize two broach seal structures to realize the dual seal to the gas channel, sealed effect has been increased, the problem that the unable promotion of compressor efficiency is caused to the size of axial (between main shaft 1 and diffuser 3) does not satisfy broach structure installation among the prior art has been overcome simultaneously.
The comb tooth sealing structure comprises a plurality of comb teeth which are arranged in parallel, the tooth depth of all the comb teeth is gradually reduced along the direction from the high pressure side of the air passing channel to the low pressure side of the air passing channel, the first end of the air passing channel is communicated with the compression cavity of the impeller 2, the second end of the air passing channel is communicated with the outside of the compressor, because the pressure in the compression cavity is far greater than the external pressure of the compressor, therefore, the first end is the high-pressure side of the air passing channel, the second end is the low-pressure side of the air passing channel, and the airflow flows from the high-pressure side to the low-pressure side through the clearance fit between the fixed comb tooth sealing part and the corresponding structure, when the air flow flows through the comb teeth, the air flow circles round to play a throttling role, after the air flow flows through the comb teeth for a plurality of times of throttling, the pressure gradually decreases to finally tend to the back pressure, thereby the broach is sealed can effectively prevent because the inside leakage that leads to of pressure differential that exists of air compressor machine.
The cross-section of broach is right trapezoid, right trapezoid's upper base is located the bottom of broach, just right trapezoid's hypotenuse orientation air channel's high-pressure side, also right trapezoid's base angle is the second end of right-angled one side orientation air channel also, and the base angle is the first end of air channel for the one side orientation of acute angle to utilize the slope of hypotenuse to come to air pressure with weakening, and the pressure difference of the broach both sides as far as possible, thereby further increase sealed effect.
The angle range of the bottom angle of the right trapezoid is 45-80 degrees.
The comb tooth sealing structure comprises a first comb tooth sealing structure 4 and a second comb tooth sealing structure 5, the first air passing gap 11 is formed between the first end surface of the diffuser 3 and the impeller 2, the second air passing gap 12 is formed between the inner surface of the diffuser 3 and the circumferential side surface of the main shaft 1, the first comb tooth sealing structure 4 is arranged on the first end surface, the tooth depths of all the comb teeth in the first comb tooth sealing structure 4 are gradually increased along the direction far away from the main shaft 1, the second comb tooth sealing structure 5 is arranged on the inner surface, the tooth depths of all the comb teeth in the second comb tooth sealing structure 5 are gradually decreased along the direction far away from the impeller 2, the first comb tooth structure is used for carrying out primary sealing on the first air passing gap 11, and the second comb tooth structure is used for carrying out secondary sealing on the second air passing gap 12, achieving the effect of double sealing.
The size from the first comb tooth sealing structure 4 to the edge of the impeller 2 is larger than or equal to 5mm, so that the influence on the structural strength of the impeller 2 caused by interference between the comb teeth and the edge of the impeller 2 is avoided.
The range of the size difference of the tooth depths of two adjacent comb teeth is 0.1-0.4mm, namely the tooth depths of the comb teeth are gradually reduced along the direction from the high pressure side to the low pressure side of the air passing channel, so that the flow velocity stagnation effect is more obvious by increasing the sudden change of the airflow area, and the effect of reducing the leakage loss of the air compressor is fully exerted.
The distance between two adjacent comb teeth ranges from 0.4mm to 1.2 mm.
The number of the comb teeth is at least 6.
The end face of the first comb tooth sealing structure 4 facing the impeller 2 is matched with the end face of the impeller 2 facing the diffuser 3, that is, the end face of the first comb tooth sealing structure 4 is adjusted along with the shape of the corresponding surface (back pressure surface) of the impeller 2, when the back pressure surface of the impeller 2 is a plane, the end face of the first comb tooth sealing structure 4 is also a plane, and when the back pressure surface of the impeller 2 is an arc surface or an irregular surface, the end face of the first comb tooth sealing structure 4 is also an arc surface or an irregular surface, in other words, the distance between the end face of the first comb tooth sealing structure 4 and the back pressure surface of the impeller 2 is ensured to be equal.
The utility model provides a fuel cell air compressor machine, includes foretell compressor, adopts two broach seal structures, and the effectual shafting size of having overcome fuel cell air compressor machine among the prior art is not enough to set up abundant broach and carries out sealed problem.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. The utility model provides a compressor, includes main shaft (1), impeller (2) and diffuser (3), impeller (2) with diffuser (3) all set up in on main shaft (1), impeller (2) with be formed with first gas gap (11) between diffuser (3), diffuser (3) with be formed with second gas gap (12) between main shaft (1), first gas gap (11) with second gas gap (12) intercommunication is crossed to the second and is formed gas passage, its characterized in that: the first air passing gap (11) and the second air passing gap (12) are both provided with comb tooth sealing structures.
2. The compressor of claim 1, wherein: the comb tooth sealing structure comprises a plurality of comb teeth which are arranged in parallel, and the tooth depth of all the comb teeth is gradually reduced along the direction from the high-pressure side of the air passing channel to the low-pressure side of the air passing channel.
3. The compressor of claim 2, wherein: the cross-section of broach is right trapezoid, right trapezoid's upper base is located the bottom of broach, just right trapezoid's hypotenuse is towards the high pressure side of air channel.
4. A compressor according to claim 3, wherein: the angle range of the bottom angle of the right trapezoid is 45-80 degrees.
5. The compressor of claim 2, wherein: the broach seal structure includes first broach seal structure (4) and second broach seal structure (5), the first terminal surface of diffuser (3) with form between impeller (2) first air gap (11) of crossing, the internal surface of diffuser (3) with form between the week side of main shaft (1) air gap (12) are crossed to the second, first broach seal structure (4) set up in on the first terminal surface, just all in first broach seal structure (4) the tooth depth of broach is along keeping away from the direction of main shaft (1) increases gradually, second broach seal structure (5) set up in on the internal surface, all in second broach seal structure (5) the tooth depth of broach is along keeping away from the direction of impeller (2) reduces gradually.
6. The compressor of claim 5, wherein: the size from the first comb tooth sealing structure (4) to the edge of the impeller (2) is larger than or equal to 5 mm.
7. The compressor of claim 2, wherein: the range of the size difference of the tooth depths of two adjacent comb teeth is 0.1-0.4 mm.
8. The compressor of claim 2, wherein: the distance between two adjacent comb teeth ranges from 0.4mm to 1.2 mm.
9. The compressor of claim 2, wherein: the number of the comb teeth is at least 6.
10. The compressor of claim 5, wherein: the end face of the first comb tooth sealing structure (4) facing the impeller (2) is matched with the end face of the impeller (2) facing the diffuser (3).
11. The utility model provides a fuel cell air compressor machine which characterized in that: comprising a compressor according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581066.XA CN111878447A (en) | 2020-06-23 | 2020-06-23 | Compressor with good sealing effect and fuel cell air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581066.XA CN111878447A (en) | 2020-06-23 | 2020-06-23 | Compressor with good sealing effect and fuel cell air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878447A true CN111878447A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010581066.XA Pending CN111878447A (en) | 2020-06-23 | 2020-06-23 | Compressor with good sealing effect and fuel cell air compressor |
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| Country | Link |
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| CN (1) | CN111878447A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB616961A (en) * | 1946-09-26 | 1949-01-28 | David Laug | Improvements in, or relating to, stuffing boxes |
| US20110182719A1 (en) * | 2010-01-22 | 2011-07-28 | General Electric Company | Method and appartus for labyrinth seal packing rings |
| CN202273908U (en) * | 2011-09-15 | 2012-06-13 | 安徽安风风机有限公司 | Main shaft seal structure of coal gas pressurizing fan |
| CN204572547U (en) * | 2015-04-15 | 2015-08-19 | 沈阳鼓风机集团齿轮压缩机有限公司 | A kind of sealing configuration of acroleic acid device recycle gas blower |
| JP2018053952A (en) * | 2016-09-27 | 2018-04-05 | 三菱重工コンプレッサ株式会社 | Seal mechanism and rotary machine |
| CN209083658U (en) * | 2018-11-14 | 2019-07-09 | 湖北三峰透平装备股份有限公司 | A kind of single-stage high-speed SO2 centrifugal blower sealing device |
| CN209370145U (en) * | 2018-12-25 | 2019-09-10 | 珠海格力电器股份有限公司 | A kind of compressor with comb tooth sealing structure impeller |
-
2020
- 2020-06-23 CN CN202010581066.XA patent/CN111878447A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB616961A (en) * | 1946-09-26 | 1949-01-28 | David Laug | Improvements in, or relating to, stuffing boxes |
| US20110182719A1 (en) * | 2010-01-22 | 2011-07-28 | General Electric Company | Method and appartus for labyrinth seal packing rings |
| CN202273908U (en) * | 2011-09-15 | 2012-06-13 | 安徽安风风机有限公司 | Main shaft seal structure of coal gas pressurizing fan |
| CN204572547U (en) * | 2015-04-15 | 2015-08-19 | 沈阳鼓风机集团齿轮压缩机有限公司 | A kind of sealing configuration of acroleic acid device recycle gas blower |
| JP2018053952A (en) * | 2016-09-27 | 2018-04-05 | 三菱重工コンプレッサ株式会社 | Seal mechanism and rotary machine |
| CN209083658U (en) * | 2018-11-14 | 2019-07-09 | 湖北三峰透平装备股份有限公司 | A kind of single-stage high-speed SO2 centrifugal blower sealing device |
| CN209370145U (en) * | 2018-12-25 | 2019-09-10 | 珠海格力电器股份有限公司 | A kind of compressor with comb tooth sealing structure impeller |
Non-Patent Citations (1)
| Title |
|---|
| 赵灿 等: "《小型整体叶轮及难切削材料高效加工技术》", 31 August 2016, 国防工业出版社 * |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20220402 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 No. six Jinji Road West, Zhuhai, Guangdong Applicant before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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Application publication date: 20201103 |