CN218991980U - Shaft end connecting structure of single-shaft rotor of large centrifugal compressor - Google Patents
Shaft end connecting structure of single-shaft rotor of large centrifugal compressor Download PDFInfo
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- CN218991980U CN218991980U CN202223557906.2U CN202223557906U CN218991980U CN 218991980 U CN218991980 U CN 218991980U CN 202223557906 U CN202223557906 U CN 202223557906U CN 218991980 U CN218991980 U CN 218991980U
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- impeller
- main shaft
- transition disc
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- centrifugal compressor
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Abstract
The utility model provides a large-scale centrifugal compressor unipolar rotor axle head connection structure, includes the connection structure body, the connection structure body comprises impeller, transition dish and main shaft, the impeller cover is established on the main shaft, is provided with the transition dish between impeller and main shaft to be located the cover and be equipped with lock nut on the main shaft in the one end that the impeller kept away from the transition dish, and be provided with the draw-in bolt in lock nut's outside, through draw-in bolt and lock nut, make impeller and main shaft hookup become an organic whole. The utility model can change the air inlet direction of the compressor and reduce air inlet loss; the matched volute can be made into an integral part, so that gas leakage is reduced, the integral efficiency of the compressor is improved, and the compressor has the advantages of simple structure, firm fixation, convenience in operation, wide application range and the like.
Description
Technical Field
The utility model relates to a shaft end connecting structure of a single-shaft rotor of a large centrifugal compressor, and belongs to the technical field of compressor accessories.
Background
In the existing large-sized centrifugal compressor single-shaft rotor technology, the single-shaft centrifugal compressor runs stably and reliably, radial air intake is generally adopted, so that the air intake loss of the compressor is large, and the overall efficiency of the compressor is low; the axial air inlet in the form of a gear compressor is adopted, so that the efficiency is high; therefore, the single-shaft compressor adopts a cantilever mode at one stage, the front bearing is arranged between the first-stage impeller and the second-stage impeller, the matched volute can adopt an integral mode, the sealing effect is good, and the leakage loss can be reduced. Therefore, the primary impeller needs to be considered to be assembled and disassembled.
In addition, the manufacture of the end face teeth is easy to find manufacturers for disc parts and domestic and foreign equipment, but the manufacture is not effective for long shafts, especially for the length of more than 4 meters. If the impeller and the main shaft are respectively driven by the axial pins, a plurality of axial pins are required to be driven because enough torque is transmitted, but the disc parts are easy to process, long shafts are also faced, and a large-scale high-precision machine tool with a high-precision turntable is difficult to find; the impeller and the main shaft are matched by a plurality of pins, so that the position degree is very high, the impeller is difficult to install due to slight errors, the impeller is not required to be disassembled, the impeller cannot be taken out at all after the impeller is installed, the main shaft which is axially connected is generally only adopted, the impeller is installed in place once, the disassembly is not considered any more, and the matched volute is made into a half type.
The structure of the end face connection is changed, and only the manufacture of disc parts is considered; the torque of the main shaft is transmitted to the transition disc, the transition disc is only required to be matched with an axial pin, the transition disc and the main shaft are not dismounted after the transition disc is planted, and if the transition disc is actually required to be dismounted, hydraulic oil is pumped into the axial pin through a hydraulic tool. For this purpose, a single shaft end coupling structure of a large centrifugal compressor is designed to overcome the above problems.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a shaft end connecting structure of a single shaft rotor of a large centrifugal compressor, which aims to change the air inlet direction of the compressor and reduce air inlet loss; the matched volute can be made into an integral part, so that gas leakage is reduced, the integral efficiency of the compressor is improved, and the impeller and the main shaft are connected through the transition disc; the end face teeth can be respectively milled or ground on the impeller and the transition disc, so that qualified manufacturers can be found in China; the manufacturing difficulty is reduced.
The utility model provides the following technical scheme: the utility model provides a large-scale centrifugal compressor unipolar rotor axle head connection structure, includes the connection structure body, the connection structure body comprises impeller, transition dish and main shaft, the impeller cover is established on the main shaft, is provided with the transition dish between impeller and main shaft to be located the cover and be equipped with lock nut on the main shaft in the one end that the impeller kept away from the transition dish, and be provided with the draw-in bolt in lock nut's outside, through draw-in bolt and lock nut, make impeller and main shaft hookup become an organic whole.
As preferable: and a sealing ring is arranged between the impeller and the transition disc and positioned on the impeller and used for preventing impurity gas from entering end face teeth on the impeller.
As preferable: the end face of the impeller, which is close to one side of the transition disc, is provided with a positioning pin hole, a positioning pin is inserted into the positioning pin hole, and the positioning pin is used for determining the direction of the impeller and the spindle, so that the installation is convenient.
As preferable: the transition disc and the main shaft are positioned through the spigot, and a plurality of axial pins are arranged between the transition disc and the main shaft and used for transmitting enough torque.
As preferable: and the main shaft is also provided with a sealing sleeve.
As preferable: the impeller is required to mill or grind end face teeth, the transition disc is required to mill or grind the end face teeth and a positioning spigot with a main shaft, and the main shaft is required to turn the positioning spigot; after the transition disc is connected with the main shaft, an axial pin for drilling and boring torque transmission is needed; the connection between the impeller and the transition disc is required to be provided with a positioning pin; a sealing ring is arranged between the impeller and the sealing sleeve, so that the end face teeth are conveniently protected; after the installation, the tension bolt is stretched by the hydraulic tool, so that the tension bolt is in an elastic deformation range and the impeller and the transition disc are tightly pressed on the main shaft, and the impeller and the transition disc are tightly connected.
A manufacturing method of a shaft end connecting structure of a single-shaft rotor of a large centrifugal compressor comprises the following steps:
1. mounting a transition disc which is milled with end face teeth, is provided with positioning pin holes and is not provided with axial pins on a main shaft in a liquid nitrogen soaking cold shrinking mode, and compacting;
2. the jump of the end face teeth is checked to meet the technical requirements;
3. drilling and boring a transition disc and axial pin holes of a main shaft on a large planer type milling machine or other machine tools, and measuring the actual size of each pin hole;
4. the actual size of the axial pin is matched, so that the interference of 0.005-0.01 mm of the axial pin is ensured;
5. soaking the axial pin in liquid nitrogen for a certain time, and quickly taking out the axial pin after the outer circle of the axial pin is reduced by a certain value, and planting the axial pin into a pin hole;
6. after the axial pin is in a normal temperature state, checking the contact surface of each runout of the end face tooth and the main shaft, wherein the contact surface is more than or equal to 70%;
7. turning or grinding a transition disc at the joint of the transition disc and the sealing sleeve and the outer circle of the main shaft;
8. confirming the interference of the thermal sealing sleeve, heating the sealing sleeve and quickly sleeving the sealing sleeve on the main shaft;
9. the main shaft is screwed with a tension bolt, a positioning pin is planted, a composite impeller is screwed with a lock nut, the tension bolt is lengthened after a certain pressure is applied through a corresponding hydraulic tool, and the lock nut is screwed with the impeller through elastic deformation of the tension bolt, so that the impeller is firmly fixed on the main shaft;
10. and (5) checking the composite technical requirements of the jumping of the impeller everywhere.
The shaft end connecting structure of the single-shaft rotor of the large centrifugal compressor can change the air inlet direction of the compressor and reduce air inlet loss; the matched volute can be made into an integral part, so that gas leakage is reduced, the integral efficiency of the compressor is improved, and the compressor has the advantages of simple structure, firm fixation, convenience in operation, wide application range and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a partial enlarged view of the present utility model.
Detailed Description
To make the above objects, features and advantages of the present utility model more comprehensible, the following embodiments are presented in order to illustrate the present utility model, but the present utility model can be practiced in other manners different from those described herein, and thus the present utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
Fig. 1 shows a large-scale centrifugal compressor single-shaft rotor axle head connection structure, including the connection structure body, its characterized in that: the connecting structure body consists of an impeller 3, a transition disc 6 and a main shaft 9, wherein the impeller 3 is sleeved on the main shaft 9, the transition disc 6 is arranged between the impeller 3 and the main shaft 9, a lock nut 2 is sleeved on the main shaft 9 at one end, far away from the transition disc 6, of the impeller 3, and a tension bolt 1 is arranged on the outer side of the lock nut 2, and the impeller 3 and the main shaft 9 are connected into a whole through the tension bolt 1 and the lock nut 2.
As shown in fig. 2, a sealing ring 4 is arranged between the impeller 3 and the transition disc 6 and positioned on the impeller 3, so as to prevent impurity gas from entering into end face teeth on the impeller 3. The end face of the impeller 3, which is close to one side of the transition disc 9, is provided with a positioning pin hole, a positioning pin 5 is inserted into the positioning pin hole, and the positioning pin 5 is used for determining the direction of the impeller and the main shaft, so that the installation is convenient. The transition disc 6 and the main shaft 9 are positioned by a spigot, and a plurality of axial pins 8 are also arranged between the transition disc 6 and the main shaft 9 for transmitting enough torque.
The main shaft 9 is also provided with a sealing sleeve 7. The impeller is required to mill or grind end face teeth, the transition disc is required to mill or grind the end face teeth and a positioning spigot with a main shaft, and the main shaft is required to turn the positioning spigot; after the transition disc is connected with the main shaft, an axial pin for drilling and boring torque transmission is needed; the connection between the impeller and the transition disc is required to be provided with a positioning pin; a sealing ring is arranged between the impeller and the sealing sleeve, so that the end face teeth are conveniently protected; after the installation, the tension bolt is stretched by the hydraulic tool, so that the tension bolt is in an elastic deformation range and the impeller and the transition disc are tightly pressed on the main shaft, and the impeller and the transition disc are tightly connected.
A manufacturing method of a shaft end connecting structure of a single-shaft rotor of a large centrifugal compressor comprises the following steps:
1. mounting a transition disc which is milled with end face teeth, is provided with positioning pin holes and is not provided with axial pins on a main shaft in a liquid nitrogen soaking cold shrinking mode, and compacting;
2. the jump of the end face teeth is checked to meet the technical requirements;
3. drilling and boring a transition disc and axial pin holes of a main shaft on a large planer type milling machine or other machine tools, and measuring the actual size of each pin hole;
4. the actual size of the axial pin is matched, so that the interference of 0.005-0.01 mm of the axial pin is ensured;
5. soaking the axial pin in liquid nitrogen for a certain time, and quickly taking out the axial pin after the outer circle of the axial pin is reduced by a certain value, and planting the axial pin into a pin hole;
6. after the axial pin is in a normal temperature state, checking the contact surface of each runout of the end face tooth and the main shaft, wherein the contact surface is more than or equal to 70%;
7. turning or grinding a transition disc at the joint of the transition disc and the sealing sleeve and the outer circle of the main shaft;
8. confirming the interference of the thermal sealing sleeve, heating the sealing sleeve and quickly sleeving the sealing sleeve on the main shaft;
9. the main shaft is screwed with a tension bolt, a positioning pin is planted, a composite impeller is screwed with a lock nut, the tension bolt is lengthened after a certain pressure is applied through a corresponding hydraulic tool, and the lock nut is screwed with the impeller through elastic deformation of the tension bolt, so that the impeller is firmly fixed on the main shaft;
10. and (5) checking the composite technical requirements of the jumping of the impeller everywhere.
The shaft end connecting structure of the single-shaft rotor of the large centrifugal compressor solves the problem that large-scale high-precision equipment is not needed to mill the end face teeth of the main shaft, solves the problem that the impeller is convenient to disassemble and assemble, reduces the production difficulty, meets the problem of enough torque transmission in design, and realizes the smooth production of the large-scale compression rotor.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (5)
1. The utility model provides a large-scale centrifugal compressor unipolar rotor axle head connection structure, includes the connection structure body, its characterized in that: the connecting structure body consists of an impeller (3), a transition disc (6) and a main shaft (9), wherein the impeller (3) is sleeved on the main shaft (9), the transition disc (6) is arranged between the impeller (3) and the main shaft (9), a lock nut (2) is sleeved on the main shaft (9) at one end, far away from the transition disc (6), of the impeller (3), and a tension bolt (1) is arranged on the outer side of the lock nut (2), and the impeller (3) is connected with the main shaft (9) into a whole through the tension bolt (1) and the lock nut (2).
2. The large centrifugal compressor single shaft rotor shaft end coupling structure according to claim 1, wherein: and a sealing ring (4) is arranged between the impeller (3) and the transition disc (6) and positioned on the impeller (3) and is used for preventing impurity gas from entering end face teeth on the impeller (3).
3. The large centrifugal compressor single shaft rotor shaft end coupling structure according to claim 2, wherein: the impeller (3) is provided with a locating pin hole on the end face close to one side of the transition disc (6), a locating pin (5) is inserted into the locating pin hole, and the direction of the impeller and the main shaft is determined through the locating pin (5), so that the impeller is convenient to install.
4. A large centrifugal compressor single shaft rotor shaft end coupling structure according to claim 3, wherein: the transition disc (6) and the main shaft (9) are positioned through the spigot, and a plurality of axial pins (8) are arranged between the transition disc (6) and the main shaft (9) and used for transmitting enough torque.
5. The large centrifugal compressor single shaft rotor shaft end coupling structure according to claim 4, wherein: the main shaft (9) is also provided with a sealing sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223557906.2U CN218991980U (en) | 2022-12-30 | 2022-12-30 | Shaft end connecting structure of single-shaft rotor of large centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223557906.2U CN218991980U (en) | 2022-12-30 | 2022-12-30 | Shaft end connecting structure of single-shaft rotor of large centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218991980U true CN218991980U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223557906.2U Active CN218991980U (en) | 2022-12-30 | 2022-12-30 | Shaft end connecting structure of single-shaft rotor of large centrifugal compressor |
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| Country | Link |
|---|---|
| CN (1) | CN218991980U (en) |
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2022
- 2022-12-30 CN CN202223557906.2U patent/CN218991980U/en active Active
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