CN109434374B - Assembling method for compressor conical surface interference fit - Google Patents
Assembling method for compressor conical surface interference fit Download PDFInfo
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- CN109434374B CN109434374B CN201811546565.4A CN201811546565A CN109434374B CN 109434374 B CN109434374 B CN 109434374B CN 201811546565 A CN201811546565 A CN 201811546565A CN 109434374 B CN109434374 B CN 109434374B
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- hydraulic
- impeller
- transmission shaft
- nut
- interference fit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/022—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using pressure fluids
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an assembly method of a compressor with an interference fit conical surface, which is characterized in that a conical shaft head of a transmission shaft is inserted into a conical hole of an impeller, so that the impeller and the transmission shaft form the interference fit; the impeller is pressed onto the transmission shaft through axial pretightening force, hydraulic oil is injected into a matching surface of the impeller and the transmission shaft through an oil injection hole in the transmission shaft to form an oil film, and meanwhile, an axial force is applied to the impeller by a hydraulic tool to move the impeller to the direction of the transmission shaft for a preset distance; and (4) unloading the pressure of the hydraulic oil in the oil filling hole, and relieving the pressure after the axial pressure is kept for half an hour to complete interference assembly. The assembly method of the invention is that the oil is injected into the matching surface to form an oil film on the conical surface so as to reduce the friction force, and the axial hydraulic tool is used for matching to realize the conical surface interference fit assembly of the impeller and the transmission shaft.
Description
Technical Field
The invention belongs to the technical field of vapor compressors, and particularly relates to an assembly method for interference fit of a conical surface of a compressor.
Background
With the rapid development of the mechanical manufacturing technology, the diameter of the impeller of the compressor for transmitting torque by utilizing the friction force generated by the interference fit of the conical surfaces is larger and larger, and the power is higher and higher; and to obtain larger transmission torque, the required interference is larger, and the assembly difficulty is correspondingly higher.
The existing interference fit assembly process method has the defects of various and complex processes and high production cost under the large-interference assembly requirement, cannot meet the assembly technical requirement of the impeller of the current large-scale compressor, and needs to be improved.
Disclosure of Invention
The invention aims to provide an interference fit assembly method for a conical surface of a compressor, and aims to solve the problems of various and complex processes and high production cost of the existing interference fit assembly process method under the large-interference assembly requirement.
The invention aims to realize the technical scheme that the assembling method of the interference fit of the conical surface of the compressor comprises the following steps:
step S1: sleeving the impeller on the transmission shaft by using a hoisting tool;
step S2: sequentially screwing the hydraulic screw and the thread conversion barrel on the transmission shaft;
step S3: sleeving the thrust cylinder on the impeller, simultaneously screwing a hydraulic nut, and connecting the dial indicator with the hydraulic nut;
step S4: connecting two hydraulic pumps with a hydraulic screw and a hydraulic nut respectively; firstly, a hydraulic pump connected with a hydraulic nut supplies oil pressure to the hydraulic nut to enable an impeller to be tightly attached to a transmission shaft, and a dial indicator is zeroed after the oil pressure of the hydraulic nut is stabilized; and then, the hydraulic pump connected with the hydraulic screw supplies oil pressure to the hydraulic screw to expand the inner hole of the impeller, meanwhile, the hydraulic pump connected with the hydraulic nut starts to pressurize to enable the impeller to be always tightly attached to the surface of the transmission shaft, when the reading of the dial indicator reaches a set value, the hydraulic pump connected with the hydraulic screw stops supplying oil and unloads the oil pressure of the hydraulic screw, the oil pressure of the hydraulic nut is unloaded after being kept for thirty minutes, and the interference assembly is completed.
Compared with the prior art, the assembling method of the interference fit of the conical surface of the compressor provided by the invention has the advantages that hydraulic oil is injected through the matching surface of the transmission shaft and the impeller, so that an oil film is formed on the conical surface to reduce the friction force, and the conical surface interference fit assembly of the impeller and the transmission shaft is realized by the cooperation of an axial hydraulic tool.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic view of an interference fit assembly structure of a compressor cone according to an embodiment of the present invention.
Wherein the reference numerals include: 1-impeller, 2-dial indicator, 3-hydraulic screw, 4-thread conversion cylinder, 5-hydraulic nut, 6-thrust cylinder and 7-transmission shaft.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows an interference fit assembly structure for a conical surface of a compressor according to an embodiment of the invention.
As shown in fig. 1, the method for assembling the interference fit of the conical surface of the compressor according to the embodiment of the present invention includes:
step S1: the impeller 1 is sleeved on the transmission shaft 7 by using a hoisting tool.
In the process of sleeving the impeller 1 on the transmission shaft 7, the conical shaft head of the transmission shaft 7 is inserted into the conical hole of the impeller 1, so that the impeller 1 and the transmission shaft 7 form interference fit.
A section of spiral groove and an oil filling hole are arranged on the transmission shaft 7, the spiral groove is communicated with the oil filling hole, and a sealing cavity is formed after the impeller 1 is tightly attached to the transmission shaft 7.
Step S2: the hydraulic screw 3 and the thread converting cylinder 4 are screwed on the transmission shaft 7 in sequence.
The hydraulic screw 3 and the transmission shaft 7 are sealed through the taper of the top of the screw thread and the taper of the bottom of the screw thread of the transmission shaft 7.
The hydraulic screw 3 is communicated with an oil injection hole of the transmission shaft 7 and used for converting a threaded hole in the transmission shaft 7 into a high-pressure oil pipe standard joint and transferring hydraulic oil to a sealing cavity formed by the impeller 1 and the transmission shaft 7, the hydraulic oil forms an oil film on the matching surface of the impeller 1 and the transmission shaft 7, and the hydraulic oil is injected through the matching surface to form the oil film on the conical surface so as to reduce the friction force of the conical surface.
The thread conversion cylinder 4 has two functions, namely, the external thread on the transmission shaft 7 is converted into the external thread matched with the hydraulic nut 5, and the sufficient use space is provided for the use of the hydraulic nut 5.
Step S3: the thrust cylinder 6 is sleeved on the impeller 1, the hydraulic nut 5 is screwed at the same time, and the dial indicator 2 is connected with the hydraulic nut 5.
The dial indicator 2 is used for ensuring the accuracy of the initial position moving distance of the impeller 1 relative to the transmission shaft 7 and indirectly ensuring the interference magnitude of the impeller 1 and the transmission shaft 7.
The hydraulic nut 5 is used for converting hydraulic pressure provided by the hydraulic pump into axial force to push the impeller 1 to move on the transmission shaft 7 and ensure that the impeller 1 and the transmission shaft 7 can always form a sealed cavity.
The thrust cylinder 6 is used as an auxiliary tool for extending the stress surface of the impeller 1 along the axial direction, so that the locking nut 5 can be conveniently used.
Step S4: two hydraulic pumps are respectively connected with a hydraulic screw 3 and a hydraulic nut 5; firstly, a hydraulic pump connected with a hydraulic nut 5 supplies oil pressure to the hydraulic nut 5 to enable an impeller 1 and a transmission shaft 7 to be tightly attached to form a sealed cavity, and a dial indicator 2 is zeroed after the oil pressure of the hydraulic nut 5 is stabilized; then, the hydraulic pump connected to the hydraulic screw 3 supplies oil pressure to the hydraulic screw 3 to expand the inner hole of the impeller 1, and at the same time, the hydraulic pump connected to the hydraulic nut 5 starts to pressurize to make the impeller 1 and the surface of the transmission shaft 7 closely attached all the time, when the reading of the dial gauge 2 reaches a set value S, the hydraulic pump connected to the hydraulic screw 3 stops supplying oil and unloads the oil pressure of the hydraulic screw 3, and the oil pressure of the hydraulic nut 5 is unloaded after being maintained for thirty minutes to complete the interference fit.
The hydraulic pressure provided by the hydraulic pump connected with the hydraulic screw 3 acts on the inner hole of the impeller 1, and the purpose is to expand the inner hole of the impeller 1 to facilitate assembly.
The process of disassembling the tool is opposite to the process of assembling the tool, and is the reverse process of assembling the tool.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A method for assembling a compressor with an interference fit conical surface comprises the following steps:
step S1: sleeving the impeller on the transmission shaft by using a hoisting tool;
step S2: sequentially screwing a hydraulic screw and a thread conversion barrel on the transmission shaft;
step S3: sleeving a thrust cylinder on the impeller, simultaneously screwing a hydraulic nut, and connecting a dial indicator with the hydraulic nut;
step S4: connecting two hydraulic pumps with the hydraulic screw and the hydraulic nut respectively; firstly, a hydraulic pump connected with the hydraulic nut supplies oil pressure to the hydraulic nut to enable the impeller to be tightly attached to the transmission shaft, and the dial indicator is zeroed after the oil pressure of the hydraulic nut is stabilized; and then, supplying oil pressure to the hydraulic screw by a hydraulic pump connected with the hydraulic screw to expand the inner hole of the impeller, starting pressurizing by the hydraulic pump connected with the hydraulic nut to enable the impeller to be always tightly attached to the surface of the transmission shaft, stopping supplying oil to the hydraulic pump connected with the hydraulic screw and unloading the oil pressure of the hydraulic screw when the reading of a dial indicator reaches a set value, and unloading after the oil pressure of the hydraulic nut is kept for thirty minutes to finish interference assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546565.4A CN109434374B (en) | 2018-12-18 | 2018-12-18 | Assembling method for compressor conical surface interference fit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546565.4A CN109434374B (en) | 2018-12-18 | 2018-12-18 | Assembling method for compressor conical surface interference fit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109434374A CN109434374A (en) | 2019-03-08 |
| CN109434374B true CN109434374B (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811546565.4A Active CN109434374B (en) | 2018-12-18 | 2018-12-18 | Assembling method for compressor conical surface interference fit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111590508A (en) * | 2020-06-13 | 2020-08-28 | 中国长江动力集团有限公司 | Hydraulic tool for installing and dismantling impeller |
| CN114378528A (en) * | 2021-12-10 | 2022-04-22 | 陕西航天机电环境工程设计院有限责任公司 | Direct current motor and gear assembly system, method and gear for bullet train and high-speed rail |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061342A (en) * | 1961-01-24 | 1962-10-30 | Allis Chalmers Mfg Co | Locking and removal device for impellers |
| CN201895201U (en) * | 2010-12-03 | 2011-07-13 | 常州朗锐东洋传动技术有限公司 | Mounting device for shaft coupling adopting conical surface interference connection |
| CN102449316A (en) * | 2009-05-26 | 2012-05-09 | 西门子公司 | Rotating machine and method of assembly thereof |
| CN103161754A (en) * | 2011-12-15 | 2013-06-19 | 重庆江增船舶重工有限公司 | Impeller structure and assembling method thereof |
| CN203003464U (en) * | 2012-12-31 | 2013-06-19 | 西安科技大学 | Combined hydraulic fastening device |
| CN206493098U (en) * | 2017-02-27 | 2017-09-15 | 展翔海事(大连)有限责任公司 | A kind of dry hydraulic mounting tool for having a key propeller |
-
2018
- 2018-12-18 CN CN201811546565.4A patent/CN109434374B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061342A (en) * | 1961-01-24 | 1962-10-30 | Allis Chalmers Mfg Co | Locking and removal device for impellers |
| CN102449316A (en) * | 2009-05-26 | 2012-05-09 | 西门子公司 | Rotating machine and method of assembly thereof |
| CN201895201U (en) * | 2010-12-03 | 2011-07-13 | 常州朗锐东洋传动技术有限公司 | Mounting device for shaft coupling adopting conical surface interference connection |
| CN103161754A (en) * | 2011-12-15 | 2013-06-19 | 重庆江增船舶重工有限公司 | Impeller structure and assembling method thereof |
| CN203003464U (en) * | 2012-12-31 | 2013-06-19 | 西安科技大学 | Combined hydraulic fastening device |
| CN206493098U (en) * | 2017-02-27 | 2017-09-15 | 展翔海事(大连)有限责任公司 | A kind of dry hydraulic mounting tool for having a key propeller |
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| CN109434374A (en) | 2019-03-08 |
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