CN218897118U

CN218897118U - Large-scale vertical synchronous motor magnetic pole fastening structure

Info

Publication number: CN218897118U
Application number: CN202222745743.4U
Authority: CN
Inventors: 张翀; 吴磊; 张古振; 杨佳鑫
Original assignee: Shanghai Electric Group Shanghai Electric Machine Works Co ltd
Current assignee: Shanghai Electric Group Shanghai Electric Machine Works Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-04-21
Anticipated expiration: 2032-10-18

Abstract

The utility model relates to a magnetic pole fastening structure of a large vertical synchronous motor, which relates to the field of vertical motors, and comprises a super nut for fixing magnetic poles, and a screw rod arranged on the magnetic poles; the super nut comprises a nut, a pushing bolt penetrating through the nut and a hardening gasket arranged between the pushing bolt and the magnetic yoke. The utility model effectively solves the problem of inconvenient installation, ensures the operation safety of the motor, and can meet the requirement of periodic repeated disassembly and maintenance of the magnetic poles.

Description

Large-scale vertical synchronous motor magnetic pole fastening structure

Technical Field

The utility model relates to the field of vertical motors, in particular to a magnetic pole fastening structure of a large vertical synchronous motor, which can be applied to convenient and reliable fixing of a magnetic pole of a medium-low-speed salient pole synchronous motor on a magnetic yoke.

Background

The magnetic pole fastening mode of the existing large vertical motor can be divided into three main modes of dove tail fixing, T tail fixing and screw fixing according to the shape of a magnetic pole punching sheet, wherein the screw fixing mode can be divided into a standard hexagonal nut double-nut fixing mode and a hydraulic stretcher round nut fixing mode according to the type of a nut.

Because the large vertical synchronous motor is often applied to the pump station, as the functions of the pump station are more and more, part of the pump stations have the characteristics of frequent startup, frequent change of load and the like, the motor is in a working condition with variable load and variable rotating speed for a long time, and the magnetic pole fixed by the double nuts can have a loose risk after long-time running under the severe working condition; in addition, along with the complexity of the rotor structure, the installation space of the magnetic pole nut is not easy to control, and the installation of the nut by using a torque wrench or a hydraulic stretcher is not facilitated, so that the assembly is difficult. After the hydraulic stretcher is used for fixing the round nuts, the homopolar round nuts are welded in series for guaranteeing the reliability, so that further looseness prevention is carried out, and the disassembly and the overhaul of the later magnetic poles are not facilitated. In addition, the runaway rotation speed of the pump station motor is higher and higher, the specification and performance requirements of the magnetic pole fastening nut are also higher and higher, the common specification mainly comprises M36, M42, M48, M56 and more, the larger the space required by corresponding fastening tools is, the conditions of insufficient pre-tightening, loosening of the nut and the like can exist when the nut is installed, and the problems exist in the assembly of the magnetic pole of the existing vertical motor.

Disclosure of Invention

The purpose of the utility model is that: the magnetic pole fastening structure of the large vertical synchronous motor is provided, the problem of inconvenient installation is effectively solved, the high-efficiency loosening performance is realized, the operation safety performance of the motor is ensured, and the requirement of periodic repeated disassembly and maintenance of the magnetic pole is met.

In order to achieve the above purpose, the technical scheme of the utility model provides a magnetic pole fastening structure of a large vertical synchronous motor, which comprises a super nut for fixing a magnetic pole, and a screw rod arranged on the magnetic pole; the super nut comprises a nut, a pushing bolt penetrating through the nut and a hardening gasket arranged between the pushing bolt and the magnetic yoke.

Preferably, the number of the pushing bolts ranges from 8 to 16, and the pushing bolts are uniformly distributed on the nuts.

Preferably, the pushing bolt has the specification of M6, M8, M10 or M12.

Preferably, a baffle is arranged below the super nut.

Preferably, the baffle is connected with the screw rod through bolts.

Preferably, a spring washer is arranged between the baffle and the screw.

Preferably, the outer edge of the baffle extends upwardly.

Preferably, the nut is a high strength nut, and the screw is a high strength screw.

In summary, the utility model has the following beneficial technical effects:

the utility model is suitable for the condition that the fastening operation space of all magnetic poles is not large, and effectively solves the problem of inconvenient installation; the utility model can prevent loosening effectively, and ensure the operation safety of the motor; the utility model has convenient disassembly and can meet the requirement of periodic and repeated disassembly and maintenance of the magnetic poles.

The multistage pushing mechanical stretching self-locking nut (hereinafter referred to as super nut) is used for fastening the high-strength magnetic pole screw, and the mounting of the super nut has the characteristics of small operation space requirement and the like, can accurately control the required pretightening force, has a high anti-loosening function, is relatively simple in dismounting, and is beneficial to the later magnetic pole overhaul and maintenance.

The utility model adopts a mode of fixing the super nut for fastening, and can be completed only by a small operation space, such as an electric torque wrench with small volume; with the longer and longer service life of the motor, the motor can be overhauled every few years, which requires that the magnetic poles are detachable, and the super nut is convenient to install and detach.

On the whole, fastening fixed magnetic pole adopts super nut can effectively improve the locking ability of magnetic pole, improves motor operation safety and stability, and still has convenient operation, durable, accurate reliable grade advantage.

Drawings

FIG. 1 is a schematic view of the installation of a super nut in a pole fastening structure of a large vertical synchronous motor according to the present utility model;

fig. 2 is a schematic diagram of the composition structure of a super nut in a magnetic pole fastening structure of a large vertical synchronous motor according to the present utility model.

Reference numerals: 1. a magnetic pole; 2. a yoke; 3. a screw; 4. hardening the gasket; 5. a nut; 6. pushing the bolt; 7. a spring washer; 8. a baffle; 9. and (5) a bolt.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model discloses a magnetic pole fastening structure of a large vertical synchronous motor, which comprises a super nut for fixing a magnetic pole 1, wherein a screw rod 3 of the magnetic pole 1 penetrates through a magnetic yoke 2 and is connected with the super nut. The super nut comprises a nut 5, a pushing bolt 6 penetrating through the nut 5 and a hardening gasket 4 arranged at the tail part of the pushing bolt 6 and contacted with the magnetic yoke 2; wherein the nut 5 is a high-strength nut, and the screw 3 is a high-strength screw.

The number of the pushing bolts 6 can be 8-16, the specifications are generally M6, M8, M10, M12 and the like, the torsional moment is uniformly dispersed into the pushing bolts 6, and the larger the number is, the smaller the moment ratio of each pushing bolt 6 is, and the anti-loosening performance is correspondingly improved.

During installation, the hardened gasket 4 is sleeved on the screw rod 3, then the high-strength nut is sleeved on the screw rod 3 and screwed below the hardened gasket 4, the pushing bolt 6 is inserted into the nut 5, the pushing bolt 6 is symmetrically rotated by using an electric torque wrench, and the tightening is performed by using 50%, 75% and 100% rated torque.

The screw 3 is further provided with a spring washer 7, a baffle plate 8 and a bolt 9 below the super nut, and finally the baffle plate 8 is fixed through the spring washer 7 and the bolt 9, and the screw 9 is fastened by using a screw thread adhesive when being installed, wherein the outer edge of the baffle plate 8 extends upwards.

According to the baffle plate 8 provided with the pushing bolt 6, if the pushing bolt 6 is loosened, the bolt 9 can be prevented from falling, and the operation safety of the motor is improved.

The utility model applies the super nut to the fixation of the rotor magnetic pole 1 of the salient pole synchronous motor, and adds the baffle plate 8 on the basis of the self-contained looseness prevention of the super nut, thereby further improving the operation safety of the motor.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A large-scale vertical synchronous motor magnetic pole fastening structure is characterized in that: the magnetic pole fixing device comprises a super nut for fixing a magnetic pole (1), and is arranged on a screw rod (3) of the magnetic pole (1); the super nut comprises a nut (5), a pushing bolt (6) penetrating through the nut (5) and a hardening gasket (4) arranged between the pushing bolt (6) and the magnetic yoke (2).

2. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 1, wherein: the number of the pushing bolts (6) ranges from 8 to 16, and the pushing bolts are uniformly distributed on the nuts (5).

3. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 2, wherein: the pushing bolt (6) is M6, M8, M10 or M12 in specification.

4. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 1, wherein: a baffle (8) is arranged below the super nut.

5. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 4, wherein: the baffle (8) and the screw (3) are connected with bolts (9).

6. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 5, wherein: a spring washer (7) is arranged between the baffle (8) and the screw (3).

7. The pole fastening structure of a large vertical synchronous motor according to claim 6, wherein: the outer edge of the baffle plate (8) extends upwards.

8. The large-scale vertical synchronous motor magnetic pole fastening structure according to claim 1, wherein: the nut (5) is a high-strength nut, and the screw (3) is a high-strength screw.