CN117366002A - High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor - Google Patents
High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor Download PDFInfo
- Publication number
- CN117366002A CN117366002A CN202311507520.7A CN202311507520A CN117366002A CN 117366002 A CN117366002 A CN 117366002A CN 202311507520 A CN202311507520 A CN 202311507520A CN 117366002 A CN117366002 A CN 117366002A
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- China
- Prior art keywords
- worm
- pressure air
- bushing
- expansion
- diffuser
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Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 17
- 238000004078 waterproofing Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to the technical field of high-speed centrifugal compressors, in particular to a high-pressure air seal waterproof method for a worm end of a high-speed centrifugal compressor. The motor casing inboard installation worm end bearing frame, the worm end diffuser is installed in the worm end bearing frame outside, the worm end diffuser includes diffuser body and bush, the outer terminal surface of bush and the interior terminal surface clearance fit of inflation worm wheel, through set up a plurality of spiral air guide groove between the outer terminal surface of bush and the interior terminal surface of inflation worm wheel, when inflation worm wheel high-speed rotation, the gas between the outer terminal surface of bush and the interior terminal surface of inflation worm wheel flows along spiral air guide groove, the gas concentrates the lateral wall department that flows to the heavy groove and forms high-pressure air film and seal waterproof. The bushing is easy to replace after being worn, the cost can be reduced, the leakage of water in the expander from a gap between the volute end diffuser and the bushing to the motor direction is effectively avoided, the corrosion of the water to the thrust bearing, the volute end radial bearing, the stator and the main shaft is avoided, and the service life is ensured.
Description
Technical field:
the invention relates to the technical field of high-speed centrifugal compressors, in particular to a high-pressure air seal waterproof method for a worm end of a high-speed centrifugal compressor.
The background technology is as follows:
the present high-speed centrifugal compressor, such as the patent application with publication number of CN114893419A, named as a fuel cell single-stage high-speed centrifugal air compressor and expander integrated system, discloses a structural form of integrating an air compressor and an expander, and when the air compressor and the expander specifically work, the gas exhausted by a fuel cell stack enters the expander to push an expansion worm wheel to rotate, and the expansion worm wheel is used for recovering the gas energy exhausted by the fuel cell stack and providing assistance for a main shaft. The worm end of the structure is provided with the worm end diffuser, a sealing baffle ring is arranged between the worm end diffuser and the main shaft, and the sealing baffle ring easily abrades the worm end diffuser along with the high-speed rotation of the main shaft, so that the service life of the worm end diffuser is influenced. If the worm end diffuser is arranged into a split structure, the bushing is added in the split structure, the bushing is easy to replace after being worn, but because the gas discharged by the fuel cell stack contains a certain amount of water vapor, the water is condensed into water after entering the expander and is easy to leak from a gap between the worm end diffuser and the bushing to the direction of the motor, and corrosion is caused to a thrust bearing, a radial bearing, a stator and a main shaft in the motor, so that the service life of the bearing and the motor is influenced, and no good method is provided at present to solve the problems.
In summary, the problem of abrasion and sealing water resistance of the scroll diffuser in the high-speed centrifugal air compressor has become a technical problem to be solved in industry.
The invention comprises the following steps:
the invention provides a high-pressure air seal waterproof method for a scroll end of a high-speed centrifugal compressor, which solves the problems that a conventional scroll end diffuser is easy to wear and has short service life, and solves the problem that water in an expander leaks from a gap between the scroll end diffuser and a bushing to a motor direction.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the scroll end high-pressure air seal waterproof method of the high-speed centrifugal compressor comprises a motor shell, a stator and a main shaft, wherein a compression end bearing seat and a scroll end bearing seat for supporting the main shaft are respectively arranged on the inner sides of two ends of the motor shell, a scroll end diffuser is arranged on the outer side of the scroll end bearing seat, an expansion worm wheel is arranged on the outer side of the main shaft, an expansion volute connected with the motor shell is arranged on the outer side of the expansion worm wheel, an expansion volute is arranged in the expansion volute, a scroll end air inlet and a scroll end air outlet which are communicated with the expansion volute are arranged on the expansion volute, and a baffle ring seat and a sealing baffle ring are arranged between the scroll end diffuser and the main shaft; the worm-end diffuser comprises a diffuser body and a bushing, wherein the outer end face of the bushing is in clearance fit with the inner end face of the expansion worm wheel, a plurality of spiral air guide grooves are formed between the outer end face of the bushing and the inner end face of the expansion worm wheel, when the expansion worm wheel rotates at a high speed, air between the outer end face of the bushing and the inner end face of the expansion worm wheel flows along the spiral air guide grooves, and the air intensively flows to the side wall of the sinking groove to form a high-pressure air film for sealing and waterproofing.
The lining is arranged in the sinking groove in the center of the diffuser body, and the inner side surface of the lining is in contact fit with the sealing baffle ring for sealing.
The diffuser body is fixedly connected with the bushing in an interference fit press fit mode.
The depth of the sinking groove is larger than the thickness of the flange of the bushing.
The spiral air guide groove is arranged on the outer end face of the bushing.
An annular groove is formed in the outer end face of the lining on the inner side of the spiral air guide groove, and the annular groove is communicated with one of the spiral air guide grooves.
And a gap is formed between the outer side of the spiral air guide groove and the outer side surface of the bushing for forming an annular high-pressure air film groove.
And a thrust disc is arranged on the main shaft between the worm end diffuser and the worm end bearing seat, and thrust bearings are respectively arranged on two sides of the thrust disc.
And a worm end radial bearing is arranged between the worm end bearing seat and the main shaft.
The invention adopts the scheme and has the following advantages:
through dividing into diffuser body and bush two parts with the worm end diffuser, the inboard surface of bush seals with sealed baffle ring contact cooperation, and the bush is worn and replaced easily, but reduce cost, establish the spiral air guide groove of the outer terminal surface of bush can seal waterproof in the lateral wall department of heavy groove formation high pressure air film when the inflation worm wheel high-speed is rotatory, effectively avoided the water in the expander to leak to the motor direction from the clearance between worm end diffuser and the bush, avoided water to lead to the fact the corruption to thrust bearing, worm end radial bearing and stator and main shaft, guaranteed life.
Description of the drawings:
fig. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic perspective view of a scroll diffuser according to the present invention.
FIG. 3 is a schematic cross-sectional view of a scroll diffuser according to the present invention.
Fig. 4 is a schematic perspective view of a bushing according to the present invention.
In the figure, 1, a motor housing, 2, a stator, 3, a main shaft, 4, a worm end bearing seat, 5, a worm end diffuser, 6, an expansion worm wheel, 7, an expansion volute, 8, an expansion worm channel, 9, a worm end air inlet, 10, a worm end air outlet, 11, a baffle ring seat, 12, a sealing baffle ring, 13, a diffuser body, 14, a bushing, 15, a sink groove, 16, a worm end radial bearing, 17, a spiral air guide groove, 18, an annular groove, 19, a high-pressure air film groove, 20, a thrust disc, 21 and a thrust bearing.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-4, the high-pressure air seal waterproof method for the scroll end of the high-speed centrifugal compressor comprises a motor shell 1, a stator 2 and a main shaft 3, wherein a compression end bearing seat and a scroll end bearing seat 4 for supporting the main shaft 3 are respectively arranged at the inner sides of two ends of the motor shell 1, a scroll end diffuser 5 is arranged at the outer side of the scroll end bearing seat 4, the main shaft 3 penetrates out of the scroll end diffuser 5 and is provided with an expansion worm wheel 6, an expansion scroll 7 connected with the motor shell 1 is arranged at the outer side of the expansion worm wheel 6, an expansion scroll 8 is arranged in the expansion scroll 7, a scroll end air inlet 9 and a scroll end air outlet 10 which are communicated with the expansion scroll 8 are arranged on the expansion scroll 7, and a baffle ring seat 11 and a sealing baffle ring 12 are arranged between the scroll end diffuser 5 and the main shaft 3; the worm-end diffuser 5 comprises a diffuser body 13 and a bushing 14, wherein the outer end surface of the bushing 14 is in clearance fit with the inner end surface of the expansion worm wheel 6, a plurality of spiral air guide grooves 17 are formed between the outer end surface of the bushing 14 and the inner end surface of the expansion worm wheel 6, and when the expansion worm wheel 6 rotates at a high speed, air between the outer end surface of the bushing 14 and the inner end surface of the expansion worm wheel 6 flows along the spiral air guide grooves 17, and the air intensively flows to the side wall of the sinking groove 15 to form a high-pressure air film for sealing and waterproofing.
The bushing 14 is installed in a sinking groove 15 in the center of the diffuser body 13, and the inner side surface of the bushing 14 is in contact fit with the sealing baffle ring 12 for sealing.
The diffuser body 13 and the bushing 14 are fixedly connected in an interference fit and press fit mode.
The depth of the sinking groove 15 is larger than the flange thickness of the lining 14, so that the side wall of the sinking groove 15 can block the gas of the spiral gas guide groove 17 to form a high-pressure gas film.
The spiral air guide groove 17 is arranged on the outer end surface of the bushing 14.
An annular groove 18 is arranged on the outer end surface of the lining 14 at the inner side of the spiral air guide groove 17, and the annular groove 18 is communicated with one of the spiral air guide grooves so as to prevent the air from flowing to the inner side of the spiral air guide groove 17 and enable the air in the spiral air guide groove 17 to flow to the side wall of the sink groove 15 in a concentrated manner.
A gap is arranged between the outer side of the spiral air guide groove 17 and the outer side surface of the bushing 14, and the gap is matched with the side wall of the sinking groove 15 to form an annular high-pressure air film groove 19, and air in the high-pressure air film groove 19 can form a high-pressure air film to seal and prevent water.
The main shaft 3 between the worm end diffuser 5 and the worm end bearing seat 4 is provided with a thrust disc 20, and two sides of the thrust disc 20 are respectively provided with a thrust bearing 21.
A worm radial bearing 16 is arranged between the worm end bearing seat 4 and the main shaft 3.
Working principle:
high-pressure gas exhausted by the fuel cell stack enters from a worm end air inlet 9, the expansion worm wheel 6 is driven to rotate by an expansion worm channel 8, the expansion worm wheel 6 is used for recovering the energy of the gas exhausted by the fuel cell stack, boosting is provided for the main shaft 3, and the gas is finally exhausted from a worm end air outlet 10. In the process, because the outer end face of the bushing 14 is in clearance fit with the inner end face of the expansion worm wheel 6, gas can enter between the outer end face of the bushing 14 and the inner end face of the expansion worm wheel 6, when the expansion worm wheel 6 rotates at a high speed, the gas can be stirred along the direction of the spiral air guide groove 17, under the blocking effect of the annular groove 18, the gas in the spiral air guide groove 17 can intensively flow to the high-pressure air film groove 19, the gas in the high-pressure air film groove 19 can form a high-pressure air film for sealing, water in the expander cannot leak from a gap between the diffuser body 13 and the bushing 14 to the motor direction, the corrosion of the thrust bearing 21, the worm end radial bearing 16, the stator 2 and the main shaft 3 caused by the water is avoided, and the service life is ensured.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (9)
1. The scroll end high-pressure air seal waterproof method of the high-speed centrifugal compressor comprises a motor shell, a stator and a main shaft, wherein a compression end bearing seat and a scroll end bearing seat for supporting the main shaft are respectively arranged on the inner sides of two ends of the motor shell, a scroll end diffuser is arranged on the outer side of the scroll end bearing seat, an expansion worm wheel is arranged on the outer side of the main shaft, an expansion volute connected with the motor shell is arranged on the outer side of the expansion worm wheel, an expansion volute is arranged in the expansion volute, a scroll end air inlet and a scroll end air outlet which are communicated with the expansion volute are arranged on the expansion volute, and a baffle ring seat and a sealing baffle ring are arranged between the scroll end diffuser and the main shaft; the method is characterized in that: the worm-end diffuser comprises a diffuser body and a bushing, wherein the outer end face of the bushing is in clearance fit with the inner end face of the expansion worm wheel, a plurality of spiral air guide grooves are formed between the outer end face of the bushing and the inner end face of the expansion worm wheel, when the expansion worm wheel rotates at a high speed, air between the outer end face of the bushing and the inner end face of the expansion worm wheel flows along the spiral air guide grooves, and the air intensively flows to the side wall of the sinking groove to form a high-pressure air film for sealing and waterproofing.
2. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 1, wherein the method comprises the steps of: the lining is arranged in the sinking groove in the center of the diffuser body, and the inner side surface of the lining is in contact fit with the sealing baffle ring for sealing.
3. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 1, wherein the method comprises the steps of: the diffuser body is fixedly connected with the bushing in an interference fit press fit mode.
4. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 2, wherein: the depth of the sinking groove is larger than the thickness of the flange of the bushing.
5. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 1, wherein the method comprises the steps of: the spiral air guide groove is arranged on the outer end face of the bushing.
6. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 5, wherein the method comprises the steps of: an annular groove is formed in the outer end face of the lining on the inner side of the spiral air guide groove, and the annular groove is communicated with one of the spiral air guide grooves.
7. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 5, wherein the method comprises the steps of: and a gap is formed between the outer side of the spiral air guide groove and the outer side surface of the bushing for forming an annular high-pressure air film groove.
8. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 1, wherein the method comprises the steps of: and a thrust disc is arranged on the main shaft between the worm end diffuser and the worm end bearing seat, and thrust bearings are respectively arranged on two sides of the thrust disc.
9. The method for waterproofing a high-pressure air seal at a scroll end of a high-speed centrifugal compressor according to claim 1, wherein the method comprises the steps of: and a worm end radial bearing is arranged between the worm end bearing seat and the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311507520.7A CN117366002B (en) | 2023-11-13 | 2023-11-13 | High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311507520.7A CN117366002B (en) | 2023-11-13 | 2023-11-13 | High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117366002A true CN117366002A (en) | 2024-01-09 |
| CN117366002B CN117366002B (en) | 2024-09-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311507520.7A Active CN117366002B (en) | 2023-11-13 | 2023-11-13 | High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117366002B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910017109A (en) * | 1990-03-11 | 1991-11-05 | 가드프레이 다불류 보스퍼 | Seal system to seal the annular space |
| CA2366696A1 (en) * | 2002-01-03 | 2003-07-03 | Paul Hughes | Externally mountable spiral bushing |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| US20100186199A1 (en) * | 2009-01-28 | 2010-07-29 | Breeze-Torca Products, Llc | Expandable clamp |
| CN101968117A (en) * | 2010-09-13 | 2011-02-09 | 清华大学 | Spiral groove end face seal device with transitional groove wall structure |
| CN105257345A (en) * | 2015-08-11 | 2016-01-20 | 苏州西达低温设备有限公司 | Energy converting device applied to bearing-free turbo expander and directly connected with power generator |
| CN210715961U (en) * | 2019-11-11 | 2020-06-09 | 安阳德一机床附件制造有限公司 | Electric main shaft front end gas seal ring structure |
| CN113809885A (en) * | 2021-09-06 | 2021-12-17 | 珠海格力电器股份有限公司 | Compressor and air conditioner and automobile with same |
-
2023
- 2023-11-13 CN CN202311507520.7A patent/CN117366002B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910017109A (en) * | 1990-03-11 | 1991-11-05 | 가드프레이 다불류 보스퍼 | Seal system to seal the annular space |
| CA2366696A1 (en) * | 2002-01-03 | 2003-07-03 | Paul Hughes | Externally mountable spiral bushing |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| US20100186199A1 (en) * | 2009-01-28 | 2010-07-29 | Breeze-Torca Products, Llc | Expandable clamp |
| CN101968117A (en) * | 2010-09-13 | 2011-02-09 | 清华大学 | Spiral groove end face seal device with transitional groove wall structure |
| CN105257345A (en) * | 2015-08-11 | 2016-01-20 | 苏州西达低温设备有限公司 | Energy converting device applied to bearing-free turbo expander and directly connected with power generator |
| CN210715961U (en) * | 2019-11-11 | 2020-06-09 | 安阳德一机床附件制造有限公司 | Electric main shaft front end gas seal ring structure |
| CN113809885A (en) * | 2021-09-06 | 2021-12-17 | 珠海格力电器股份有限公司 | Compressor and air conditioner and automobile with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117366002B (en) | 2024-09-13 |
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