CN113374739A - Method for machining radial bearing mounting hole and air cycle machine - Google Patents
Method for machining radial bearing mounting hole and air cycle machine Download PDFInfo
- Publication number
- CN113374739A CN113374739A CN202110707711.2A CN202110707711A CN113374739A CN 113374739 A CN113374739 A CN 113374739A CN 202110707711 A CN202110707711 A CN 202110707711A CN 113374739 A CN113374739 A CN 113374739A
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- mounting hole
- mounting
- mounting seat
- machined
- aperture
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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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
Abstract
The application provides a processing method of a radial bearing mounting hole and an air cycle machine, comprising the following steps: processing a first mounting seat and a second mounting seat; a first mounting hole is formed in the first mounting seat, a second mounting hole is formed in the second mounting seat, and the aperture of the first mounting hole and the aperture of the second mounting hole are smaller than a preset aperture; assembling the first mounting seat and the second mounting seat according to a working state; simultaneously extending the same machining tool into the first mounting hole and the second mounting hole, and synchronously expanding the aperture of the first mounting hole and the aperture of the second mounting hole to a preset aperture. The application provides a processing method of radial bearing mounting holes and an air cycle machine, which can enable the mounting holes to have good coaxiality, so that the good coaxiality between the bearings is ensured, and the working reliability of a rotor system is further ensured.
Description
Technical Field
The application belongs to the technical field of air conditioning, and particularly relates to a machining method of a radial bearing mounting hole and an air circulator.
Background
A rotor system assembly of an air cycle machine is supported by at least two radial bearings, the rotor system being in high speed rotational movement relative to the radial bearings. The operation condition of the rotor system is directly influenced by the level of the assembly precision control of the radial bearings, the coaxiality between the radial bearings is a key factor influencing the precision control level, and a set of mounting hole machining method capable of ensuring better coaxiality does not exist in the prior art, so that the coaxiality between the mounting holes is larger, and the working reliability of the rotor system is influenced.
Disclosure of Invention
Therefore, an object of the present invention is to provide a method for processing radial bearing mounting holes and an air cycle machine, which can ensure good coaxiality between the mounting holes, thereby ensuring good coaxiality between the bearings, and further ensuring operational reliability of a rotor system.
In order to solve the above problem, the present application provides a method for machining a radial bearing mounting hole, including: processing a first mounting seat and a second mounting seat; a first mounting hole is formed in the first mounting seat, a second mounting hole is formed in the second mounting seat, and the aperture of the first mounting hole and the aperture of the second mounting hole are smaller than a preset aperture; assembling the first mounting seat and the second mounting seat according to a working state; simultaneously extending the same machining tool into the first mounting hole and the second mounting hole, and synchronously expanding the aperture of the first mounting hole and the aperture of the second mounting hole to a preset aperture.
Optionally, the coaxiality of the first mounting hole and the second mounting hole is z, the preset aperture is D, and z/D is less than or equal to 0.001.
Optionally, a distance between a plane where the opening of the first mounting hole far away from the second mounting seat is located and a plane where the opening of the second mounting hole far away from the first mounting seat is located is L, the preset aperture is D, and L/D is less than or equal to 6.
Optionally, the air cycle machine further comprises a compressor housing;
assembling the first mounting seat and the second mounting seat according to a working state comprises:
the first mount is mounted to a first side of the compressor housing and the second mount is mounted to a second side of the compressor housing.
Optionally, a first annular protrusion is machined on the first mounting seat, a first connecting groove is machined on the first side of the compressor housing, the first annular protrusion is assembled into the first connecting groove, the outer diameter length of the first annular protrusion is machined to d1, and the length of the first annular protrusion extending into the first connecting groove is machined to w1, wherein w1/d1 is 0.3-1.0.
Optionally, the first connecting groove and the first annular protrusion are processed, so that the inner diameter of the first connecting groove is 0.01mm to 0.05mm larger than the outer diameter of the first annular protrusion.
Optionally, a second annular protrusion is machined on the second side of the compressor housing, a second connecting groove is machined on the second mounting seat, the second annular protrusion is assembled into the second connecting groove, the outer diameter length of the second annular protrusion is machined to d2, and the length of the second annular protrusion extending into the second connecting groove is machined to w2, wherein w2/d2 is 0.3-1.0.
Optionally, a first section and a second section are machined in the second connecting groove, the second annular bulge is assembled into the first section through the second section, the length of the inner diameter of the first section is machined to d3, and the length of the first section along the central axis of the first section is machined to w3, wherein w3/d3 is 0.3-1.0.
Optionally, d2/═ 2200 to 8800.
In another aspect of the present application, an air cycle machine is provided, which includes a first mounting seat on which a first mounting hole is machined by the machining method as described above, and a second mounting seat on which a second mounting hole is machined by the machining method as described above.
Optionally, a first radial bearing is arranged in the first mounting hole, and a second bearing is arranged in the second mounting hole.
Optionally, the first radial bearing is fixed in the first mounting hole through a bolt, and the second bearing is fixed in the second mounting hole through a bolt.
Advantageous effects
According to the processing method of the radial bearing mounting holes and the air cycle machine, good coaxiality can be achieved among the mounting holes, so that good coaxiality among the bearings is guaranteed, and working reliability of a rotor system is further guaranteed.
Drawings
FIG. 1 is an exploded view of an air cycle machine of an embodiment of the present application without first and second radial bearings;
FIG. 2 is a cross-sectional view of a second mount of an embodiment of the present application;
FIG. 3 is a cross-sectional view of an air cycle machine of an embodiment of the present application without first and second radial bearings;
FIG. 4 is an exploded view of an air cycle machine including a first radial bearing and a second bearing according to an embodiment of the present application.
The reference numerals are represented as:
1. a first mounting seat; 11. a first mounting hole; 12. a first annular projection; 13. mounting grooves; 2. a second mounting seat; 21. a second mounting hole; 22. a second connecting groove; 221. a first stage; 222. a second stage; 3. a compressor housing; 31. a first connecting groove; 32. a second annular projection; 41. a first radial bearing; 42. a second bearing.
Detailed Description
Referring to fig. 1 to 4 in combination, according to an embodiment of the present application, a method for machining a radial bearing mounting hole includes: processing a first mounting seat 1 and a second mounting seat 2; a first mounting hole 11 is formed in the first mounting seat 1, a second mounting hole 21 is formed in the second mounting seat 2, and the aperture of the first mounting hole 11 and the aperture of the second mounting hole 21 are smaller than a preset aperture; assembling the first mounting seat 1 and the second mounting seat 2 according to a working state; stretch into first mounting hole 11 and second mounting hole 21 with same processing cutter simultaneously in, enlarge the aperture of first mounting hole 11 and the aperture of second mounting hole 21 to predetermineeing the aperture in step, through the aperture of enlarging first mounting hole 11 and second mounting hole 21 simultaneously, can readjust the axiality of first mounting hole 11 and second mounting hole 21, reduce the problem that the axiality is bigger than normal between the mounting hole that assembly error stack brought, can realize improving the axiality of first mounting hole 11 and second mounting hole 21, and then control the axiality of radial bearing assembly effectively, the operational reliability of high-speed rotor has been improved.
Further, before the first mounting base 1 and the second mounting base 2 are assembled according to the working state, the first mounting base 1 and the second mounting base 2 are separated and are not connected.
Further, before the first mounting seat 1 and the second mounting seat 2 are assembled, the first mounting hole 11 may be formed during the manufacture of the first mounting seat 1 or before the assembly, and the second mounting hole 21 may be formed during the manufacture of the second mounting seat 2 or before the assembly.
Further, the first mounting base 1 is a bearing base, and the second mounting base 2 is a fan base.
Further, when expanding the aperture of first mounting hole 11 and the aperture of second mounting hole 21 to predetermineeing the aperture, get rid of the material through honing machining, accomplish reaming operation, air cycle machine still includes the expander, and the one end that first mounting seat 1 was kept away from to second mounting seat 2 is provided with mounting groove 13, and mounting groove 13 is used for connecting the expander to mounting groove 13 enlarges the aperture of first mounting hole 11 and the aperture of second mounting hole 21 to predetermineeing the aperture as the benchmark.
The coaxiality of the first mounting hole 11 and the second mounting hole 21 is z, the preset aperture is D, and the z/D is less than or equal to 0.001, so that the coaxiality of the first mounting hole 11 and the second mounting hole 21 can be ensured to be within an ideal range, the coaxiality of radial bearing assembly is effectively controlled, and the working reliability of the high-speed rotor is improved.
The distance between the plane of the opening far away from the second mounting seat 2 in the first mounting hole 11 and the plane of the opening far away from the first mounting seat 1 in the second mounting hole 21 is L, the preset aperture is D, and L/D is less than or equal to 6, so that the coaxiality of the first mounting hole 11 and the second mounting hole 21 can be effectively controlled after the apertures of the first mounting hole 11 and the second mounting hole 21 are enlarged.
Further, the plane of the opening of the first mounting hole 11 is parallel to the plane of the opening of the second mounting hole 21.
Further, a distance between a plane where the opening of the first mounting hole 11 is located and a plane where the opening of the second mounting hole 21 is located, that is, a shortest distance between an end surface of the first mounting hole 11 and an end surface of the second mounting hole 21.
The air cycle machine further includes a compressor housing 3; assembling the first mounting base 1 and the second mounting base 2 according to the working state comprises: assemble first mount pad 1 to compressor housing 3 on the first side, assemble second mount pad 2 to compressor housing 3's second side on, through setting up compressor housing 3, when realizing providing the mounted position for other parts of compressor, also can guarantee the firm assembly of first mount pad 1 and second mount pad 2.
Further, the first side and the second side are two opposite sides of the compressor housing 3, as shown in fig. 1, the first side is a left side, and the second side is a right side.
Processing first annular arch 12 on first mount pad 1, processing first connecting groove 31 on compressor housing 3's first side, assemble first annular arch 12 to first connecting groove 31 in, the external diameter length processing of first annular arch 12 is d1, the length processing that stretches into first connecting groove 31 with first annular arch 12 is w1, w1/d1 equals 0.3 ~ 1.0, when guaranteeing that first mount pad 1 can be with compressor housing 3 stable connection, improve the precision of assembly, reduce the error, and then improve the axiality of first mounting hole 11 and second mounting hole 21, w1/d1 value is too big then the assembly difficulty, w1/d1 value is too little then the location effect is not good.
Further, the first annular projection 12 is provided with reference to the mounting groove 13.
Further, the first annular protrusion 12 is a circular annular protrusion structure and extends in the axial direction.
The first connecting groove 31 and the first annular protrusion 12 are processed, so that the inner diameter of the first connecting groove 31 is 0.01-0.05 mm larger than the outer diameter of the first annular protrusion 12, stable connection between the first mounting seat 1 and the compressor shell 3 is further guaranteed, assembly precision is improved, and errors are reduced.
Further, compressor housing 3 is provided with first casing flange face, and first mount pad 1 is provided with first flange face, first casing flange face and the assembly of first flange face laminating, and first annular arch 12 is started from the annular protruding structure of first flange face to outwards outstanding along the axial, first flange face can also play the effect of backstop, and it is spacing to form in the direction that first annular arch 12 got into first connecting groove 31, prevents that first mount pad 1 from excessively getting into. The threaded holes are formed in the circumferential direction of the first shell flange face, the first flange face is correspondingly provided with the threaded holes, and the first shell flange face and the first flange face are fastened together through penetrating bolts.
Processing second annular arch 32 on compressor housing 3's the second side, processing second connecting groove 22 on second mount pad 2, assemble second annular arch 32 to the second connecting groove 22 in, the external diameter length processing of second annular arch 32 is d2, the length processing that stretches into in the second connecting groove 22 with second annular arch 32 is w2, w2/d2 is 0.3 ~ 1.0, when guaranteeing that second mount pad 2 can be with the stable connection of compressor housing 3, improve the precision of assembly, reduce the error, and then improve the axiality of first mounting hole 11 and second mounting hole 21.
Further, a second annular projection 32 is provided with reference to the first coupling groove 31.
Further, the second annular protrusion 32 is also substantially annular, and the second annular protrusion 32 extends in a radial direction.
The first section 221 and the second section 222 are machined in the second connecting groove 22, the second annular bulge 32 penetrates through the second section 222 to be assembled into the first section 221, the length of the inner diameter of the first section 221 is machined to be d3, the length of the first section 221 along the central axis of the first section 221 is machined to be w3, and w3/d3 is 0.3-1.0, so that the stable assembly of the second connecting groove 22 and the second annular bulge 32 is guaranteed, errors are effectively reduced, and the assembly precision is guaranteed.
Further, the first section 221 and the second section 222 are coaxially disposed and are both cylindrical, and the diameter of the second section 222 is larger than that of the first section 221.
d2/d3-d2 is 2200-8800, so that the second connecting groove 22 and the second annular bulge 32 are stably assembled, errors are effectively reduced, and the assembling precision is guaranteed.
Further, be provided with second casing flange face on compressor housing 3, set up second flange face on second mount pad 2, the effect of backstop can also be played to the second flange face, and it is spacing to form in the direction that second annular bulge 32 got into second spread groove 22, prevents that second mount pad 2 from excessively getting into. And the second shell flange surface is provided with a threaded hole correspondingly, and the second shell flange surface and the second flange surface are fastened together through penetrating bolts.
In another aspect of the present embodiment, an air cycle machine is provided, which includes a first mounting base 1 and a second mounting base 2, wherein a first mounting hole 11 is formed in the first mounting base 1 by the machining method as described above, and a second mounting hole 21 is formed in the second mounting base 2 by the machining method as described above.
Further, the air cycle machine includes a rotor system, the radial direction of which is supported by a first radial bearing 41 and a second radial bearing.
Further, a first radial bearing 41 is provided in the first mounting hole 11, and a second bearing 42 is provided in the second mounting hole 21.
The first radial bearing 41 is fixed in the first mounting hole 11 through a bolt, and the second bearing 42 is fixed in the second mounting hole 21 through a bolt, so that the first radial bearing 41 and the second radial bearing are prevented from being separated, and the assembly stability is ensured.
Further, the outer cylindrical surface of the first radial bearing 41 is fitted into the shaft hole of the first mounting hole 11, and the first radial bearing 41 is fixed to the first mounting base 1 by a bolt. The outer cylindrical surface of the second radial bearing is matched and assembled with the shaft hole of the second mounting hole 21, the second radial bearing is fixed on the second mounting seat 2 through a bolt, and the coaxiality of the first mounting hole 11 and the second mounting hole 21 can be effectively controlled, so that the coaxiality of the first radial bearing 41 and the second radial bearing is controlled.
The processing method of the radial bearing mounting hole and the air cycle machine provided by the embodiment of the invention can ensure good coaxiality between the bearings, thereby ensuring the working reliability of a rotor system.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. 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 (12)
1. A method for processing a radial bearing mounting hole is characterized by comprising the following steps:
processing a first mounting seat (1) and a second mounting seat (2);
a first mounting hole (11) is formed in the first mounting seat (1), a second mounting hole (21) is formed in the second mounting seat (2), and the aperture of the first mounting hole (11) and the aperture of the second mounting hole (21) are smaller than a preset aperture;
assembling the first mounting seat (1) and the second mounting seat (2) according to a working state;
the same machining tool is simultaneously stretched into the first mounting hole (11) and the second mounting hole (21), and the aperture of the first mounting hole (11) and the aperture of the second mounting hole (21) are synchronously enlarged to a preset aperture.
2. The machining method according to claim 1, wherein the coaxiality of the first mounting hole (11) and the second mounting hole (21) is z, the preset hole diameter is D, and z/D is less than or equal to 0.001.
3. The machining method according to claim 1, characterized in that a distance between a plane of an opening of the first mounting hole (11) far away from the second mounting seat (2) and a plane of an opening of the second mounting hole (21) far away from the first mounting seat (1) is L, the preset hole diameter is D, and L/D is less than or equal to 6.
4. The process according to claim 1, characterized in that the air cycle machine further comprises a compressor housing (3);
assembling the first mounting seat (1) and the second mounting seat (2) according to a working state comprises the following steps:
-fitting the first mounting seat (1) to a first side of the compressor housing (3), -fitting the second mounting seat (2) to a second side of the compressor housing (3).
5. The machining method according to claim 4, characterized in that a first annular projection (12) is machined on the first mounting seat (1), a first connecting groove (31) is machined on a first side of the compressor housing (3), the first annular projection (12) is fitted into the first connecting groove (31), the outer diameter length of the first annular projection (12) is machined to d1, the length of the first annular projection (12) extending into the first connecting groove (31) is machined to w1, w1/d1 being 0.3-1.0.
6. The machining method according to claim 5, characterized in that the first connection groove (31) and the first annular protrusion (12) are machined such that the inner diameter of the first connection groove (31) is 0.01mm to 0.05mm larger than the outer diameter of the first annular protrusion (12).
7. The machining method according to claim 4, characterized in that a second annular bulge (32) is machined on the second side of the compressor housing (3), a second connecting groove (22) is machined on the second mounting seat (2), the second annular bulge (32) is fitted into the second connecting groove (22), the second annular bulge (32) is machined to d2 in outside diameter length, the second annular bulge (32) is machined to w2 in length, w2/d2 is 0.3-1.0.
8. The machining method according to claim 7, characterized in that a first section (221) and a second section (222) are machined in the second connecting groove (22), the second annular protrusion (32) is fitted into the first section (221) through the second section (222), the inner diameter length of the first section (221) is machined to d3, and the length of the first section (221) along its central axis is machined to w3, w3/d3 being 0.3-1.0.
9. The method as claimed in claim 8, wherein d2/(d3-d2) is 2200-8800.
10. An air cycle machine, characterized by comprising a first mounting seat (1) and a second mounting seat (2), wherein the first mounting seat (1) is provided with a first mounting hole (11) processed by the processing method according to any one of claims 1 to 9, and the second mounting seat (2) is provided with a second mounting hole (21) processed by the processing method according to any one of claims 1 to 9.
11. The air cycle machine of claim 10, wherein a first radial bearing (41) is disposed within the first mounting hole (11) and a second bearing (42) is disposed within the second mounting hole (21).
12. The air cycle machine of claim 11, wherein the first radial bearing (41) is bolted in the first mounting hole (11) and the second bearing (42) is bolted in the second mounting hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110707711.2A CN113374739B (en) | 2021-06-24 | 2021-06-24 | Method for machining radial bearing mounting hole and air cycle machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110707711.2A CN113374739B (en) | 2021-06-24 | 2021-06-24 | Method for machining radial bearing mounting hole and air cycle machine |
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| Publication Number | Publication Date |
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| CN113374739A true CN113374739A (en) | 2021-09-10 |
| CN113374739B CN113374739B (en) | 2023-04-18 |
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| CN114952284A (en) * | 2022-06-29 | 2022-08-30 | 中航力源液压股份有限公司 | Processing method for improving motion stability of high-speed heavy-load axial plunger pump |
| TWI792804B (en) * | 2021-12-23 | 2023-02-11 | 豪力輝工業股份有限公司 | Drive shaft bearing seat mounting device |
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| CN113374739B (en) | 2023-04-18 |
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