CN214205217U - Thrust disc for electromagnetic bearing and connection structure of motor shaft of helium circulator - Google Patents
Thrust disc for electromagnetic bearing and connection structure of motor shaft of helium circulator Download PDFInfo
- Publication number
- CN214205217U CN214205217U CN202022287513.9U CN202022287513U CN214205217U CN 214205217 U CN214205217 U CN 214205217U CN 202022287513 U CN202022287513 U CN 202022287513U CN 214205217 U CN214205217 U CN 214205217U
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- thrust disc
- motor shaft
- thrust
- helium
- helium circulator
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides a thrust dish and helium circulator motor shaft connection structure for electromagnetic bearing, belongs to helium circulator technical field to solve current thrust dish and the ordinary interference fit of helium circulator motor shaft adoption, can't satisfy the problem of joint strength requirement. The utility model relates to a thrust disc for electromagnetic bearing, thrust disc's central processing has the taper hole, and the surface of taper hole is equipped with annular oil groove, still be equipped with the oil circuit on the thrust disc, oil circuit and annular oil groove intercommunication. The utility model discloses set up the circular cone hole at the center of thrust dish, increase with the area of contact of helium fan motor shaft to increase magnitude of interference, satisfy joint strength. Although the interference magnitude between the thrust disc and the motor shaft of the helium circulator is large, the thrust disc is convenient to disassemble, and the working condition requirement of the reactor can be met.
Description
Technical Field
The utility model particularly relates to a thrust disc and main helium fan motor shaft connection structure for electromagnetic bearing.
Background
The main helium fan has the function of driving helium in a primary loop of the high-temperature gas cooled reactor to flow through a reactor core of the reactor, and provides helium with sufficient flow to pass through a primary loop system to take away heat generated by the reactor core of the reactor under the working conditions of normal startup, power operation, shutdown and the like of the reactor. The electromagnetic bearing is one of important parts on the helium circulator, the electromagnetic bearing generates magnetic field force to suspend the whole rotor of the helium circulator, the thrust disc is a part for supporting the whole rotor, and the thrust disc is related to the shape and the structure of the thrust disc besides the electromagnetic property of the selected material. The existing thrust disc and the motor shaft of the helium circulator are connected in a matched mode through a cylindrical surface, and the thrust disc bears large thrust when being jacked up by magnetic force, so that the requirement for connection strength cannot be met through common interference fit.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present thrust dish and helium circulator motor shaft and adopt ordinary interference fit, can't satisfy the problem of joint strength requirement, and provide a thrust dish and helium circulator motor shaft connection structure for electromagnetic bearing.
The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:
the first scheme is as follows: a circular cone hole is machined in the center of the thrust disc, an annular oil groove is formed in the surface of the circular cone hole, and an oil way is further arranged on the thrust disc and communicated with the annular oil groove.
Preferably, the outer circumferential surface of the thrust disc is provided with a plurality of balance holes.
Preferably, the thrust disc is made of forged steel 40 CrNiMoA.
Scheme II: a main helium fan motor shaft connecting structure comprises a thrust disc, a main helium fan motor shaft and a nut, wherein a conical surface and an external thread are machined on the main helium fan motor shaft, a conical hole in the thrust disc is in interference fit with the conical surface, and the nut is in threaded connection with the external thread to enable the thrust disc to be tightly pressed on the main helium fan motor shaft.
Preferably, the contact rate of the conical surface and the conical hole is not lower than 80%.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model discloses set up the circular cone hole at the center of thrust dish, increase with the area of contact of helium fan motor shaft to increase magnitude of interference, satisfy joint strength.
Second, the utility model discloses thrust dish and the interference magnitude of helium circulator motor shaft are great, but convenient to detach can satisfy the operating mode requirement of reactor.
Thirdly, the utility model discloses but the stable work under special environment such as nuclear power plant irradiation, damp and hot, high temperature, high rotational speed and antidetonation.
Drawings
Fig. 1 is a schematic view of a thrust disc 1 of the present invention;
fig. 2 is a schematic view of the motor shaft connecting structure of the helium circulator of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.
Example 1: the embodiment is described in conjunction with fig. 1, and relates to a thrust disc for an electromagnetic bearing, wherein a conical hole 1-1 is machined in the center of the thrust disc 1 to increase interference with a motor shaft of a helium circulator; for convenience of disassembly, the surface of the conical hole is provided with an annular oil groove 1-2, the thrust disc 1 is further provided with an oil path 1-3, the oil path 1-3 is communicated with the annular oil groove 1-2, and an oil inlet hole of the oil path 1-3 is filled with hydraulic oil.
In order to meet the requirement of dynamic balance in the rotating process, the outer circle surface of the thrust disc 1 is provided with a plurality of balance holes 1-4.
The thrust disc 1 is made of forged steel 40CrNiMoA so as to prevent the influence on strength caused by material change in the environments of irradiation, damp heat, high temperature and the like of a nuclear power plant.
Example 2: the embodiment is described with reference to fig. 2, and the shaft connection structure of the helium circulator motor of the embodiment includes the thrust disc 1, the helium circulator motor shaft 2, and the nut 3 described in embodiment 1, wherein a conical surface and an external thread are processed on the helium circulator motor shaft 2, a conical hole on the thrust disc 1 is in interference fit with the conical surface, and the nut 3 is screwed with the external thread and presses the thrust disc 1 on the helium circulator motor shaft 2.
The thrust disc 1 and the motor shaft 2 of the helium circulator reach certain interference magnitude by the extrusion of the nut 3, so that the interference force meets the connection strength.
Preferably, the contact rate of the conical surface and the conical hole is not lower than 80%.
Although the present invention has been described in detail with reference to certain specific embodiments, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (5)
1. A thrust disc for an electromagnetic bearing, characterized by: a conical hole (1-1) is machined in the center of the thrust disc (1), an annular oil groove (1-2) is formed in the surface of the conical hole, an oil way (1-3) is further arranged on the thrust disc (1), and the oil way (1-3) is communicated with the annular oil groove (1-2).
2. The thrust disk of claim 1, wherein: the outer circle surface of the thrust disc (1) is provided with a plurality of balance holes (1-4).
3. The thrust disk of claim 1, wherein: the thrust disc (1) is made of forged steel 40 CrNiMoA.
4. The utility model provides a helium fan motor shaft connection structure which characterized in that: the helium fan motor shaft sealing device comprises the thrust disc (1) as claimed in any one of claims 1 to 3, a helium fan motor shaft (2) and a nut (3), wherein a conical surface and an external thread are machined on the helium fan motor shaft (2), a conical hole in the thrust disc (1) is in interference fit with the conical surface, and the nut (3) is in threaded connection with the external thread and enables the thrust disc (1) to be tightly pressed on the helium fan motor shaft (2).
5. The connection structure of the shaft of the helium circulator motor according to claim 4, wherein: the contact rate of the conical surface and the conical hole is not lower than 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022287513.9U CN214205217U (en) | 2021-06-02 | 2021-06-02 | Thrust disc for electromagnetic bearing and connection structure of motor shaft of helium circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022287513.9U CN214205217U (en) | 2021-06-02 | 2021-06-02 | Thrust disc for electromagnetic bearing and connection structure of motor shaft of helium circulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214205217U true CN214205217U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022287513.9U Active CN214205217U (en) | 2021-06-02 | 2021-06-02 | Thrust disc for electromagnetic bearing and connection structure of motor shaft of helium circulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214205217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700746A (en) * | 2021-09-23 | 2021-11-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor and air conditioner |
| CN115240886A (en) * | 2022-07-28 | 2022-10-25 | 中国核动力研究设计院 | Dismounting device for components of high-temperature gas cooled reactor primary helium fan |
-
2021
- 2021-06-02 CN CN202022287513.9U patent/CN214205217U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700746A (en) * | 2021-09-23 | 2021-11-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor and air conditioner |
| CN115240886A (en) * | 2022-07-28 | 2022-10-25 | 中国核动力研究设计院 | Dismounting device for components of high-temperature gas cooled reactor primary helium fan |
| CN115240886B (en) * | 2022-07-28 | 2023-09-19 | 中国核动力研究设计院 | High-temperature gas cooled reactor main helium fan component dismounting device |
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