CN217824685U

CN217824685U - Motor magnetic force central line correcting device

Info

Publication number: CN217824685U
Application number: CN202221248213.2U
Authority: CN
Inventors: 黄文滔; 朱海垒; 尹以宣; 侯长伟; 程晨; 孟浩; 张宝贵
Original assignee: China Energy Construction Group Anhui Power Construction Second Engineering Co ltd
Current assignee: China Energy Construction Group Anhui Power Construction Second Engineering Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-11-15
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a motor magnetic force central line checking device, which comprises a horizontally arranged connecting plate, wherein the connecting plate comprises a first fixed section for fixing a motor rotor and a second fixed section for fixing a bearing cover; the lower end faces of the connecting plates positioned at the two ends of the first fixed section are vertically connected with a first end plate and a second end plate; the first end plate is provided with a first clamp, the second end plate is provided with a second clamp, and one end of the connecting plate located at the second fixing section is provided with a third clamp. The utility model discloses a spring jack silk is fixed on electric motor rotor both sides, gives electric motor rotor proofreading debugging in-process an allowable axial displacement volume. The motor rotor is coiled, the motor magnetic force central line indicator is observed, the adjustment quantity is reserved through the spring jackscrews on the two rotating sides to adjust the motor magnetic force central line, in the adjustment process, the jacks of the spring jackscrews on the two sides can extend or shorten along with the movement of the motor rotor, and are always abutted against the side face of the motor rotor, so that the effective fixation is realized, and the safety is improved.

Description

Motor magnetic force central line correcting device

Technical Field

The utility model relates to a motor overhauls technical field, specifically is a motor magnetic force central line verifying unit.

Background

At present, the magnetic force central line of a motor rotor needs to be corrected before a large-scale equipment motor is installed and a connecting shaft is debugged and after the equipment is disassembled and overhauled in the power industry. The magnetic field of the motor is mainly present at the gap between the stator and the rotor, called air gap field. At a certain position, the magnetic lines of the air-gap magnetic field are all perpendicular to the rotating shaft, and have no axial component, and the position is called a magnetic force central line. If the magnetic neutral line is not corrected during shaft connection, the motor and the driven machine can bear an axial force, for example, the deviation of the magnetic central line is large, and the axial displacement of the rotor part when the motor is unloaded or loaded causes damage to other parts such as bearing bushes and the like, or influences the operation condition of equipment.

The motor is disengaged from the coupling to idle, and the position of the motor when the motor stably rotates is the position of the magnetic centerline. For a large motor, a technical specification or a manufacturer operation and maintenance manual generally requires to correct a magnetic center line, the large motor generally has an external measuring method for marking the magnetic center on a nameplate, a main water feed pump is important equipment for ensuring the safe operation of a nuclear power plant, the maintenance process of the large motor is very strict, and in the process of calibrating the magnetic center line of the main water feed pump motor in the prior art, a lengthened loop bar is used for driving a motor rotor to move axially and the rotor is manually pushed to move axially, so that the force is difficult to master due to the rotation of the rotor, the manual pushing execution difficulty is high, and the damage of surrounding control equipment is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor magnetic force central line verifying unit to solve the problem that proposes in the above-mentioned background art, eliminated the unsafe factor when using spanner extension loop bar adjustment electric motor rotor, maintained for the motor and provided comparatively convenient construction environment.

In order to achieve the above object, the utility model provides a following technical scheme:

a motor magnetic force center line correction device comprises a connecting plate which is horizontally arranged, wherein the connecting plate comprises a first fixing section for fixing a motor rotor and a second fixing section for fixing a bearing cover; the lower end faces of the connecting plates positioned at the two ends of the first fixed section are vertically connected with a first end plate and a second end plate; a first clamp is arranged on the first end plate, a second clamp is arranged on the second end plate, and a third clamp is arranged at one end of the connecting plate positioned at the second fixing section; the first clamp and the second clamp can move back and forth along the length direction of the connecting plate, and the third clamp can move back and forth along the thickness direction of the connecting plate.

As a further aspect of the present invention: the first clamp, the second clamp and the third clamp are all spring jackscrews.

As a further aspect of the present invention: the number of the first clamps is one, the number of the second clamps is two, and the number of the third clamps is two.

As a further aspect of the present invention: the length of the first end plate is longer than the length of the second end plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a spring jack silk is fixed on electric motor rotor both sides, gives electric motor rotor proofreads and correct the axial displacement volume that an allowance in the debugging process. When electric motor rotor took place axial displacement, the top of both sides spring jackscrew can extend or shorten along with electric motor rotor's removal, all the time with electric motor rotor side butt, realize effectively fixedly, improved the security.

When the electric motor rotor rotated, the hemisphere top of spring jackscrew can reduce the static friction that electric motor rotor produced to the axle bush relatively, prevented to move other equipment parts such as adjustment in-process damage axle bush at the dish.

The device can effectively improve the working efficiency of the motor for calibrating the magnetic central line, saves labor and shortens the construction period.

Drawings

FIG. 1 is a schematic view of the connection of the present invention with a motor rotor;

fig. 2 is a schematic diagram of the structure of the middle connection plate, the first end plate and the second end plate of the present invention;

in the figure: 1-connecting plate, 11-first fixing section, 12-second fixing section, 121-third screw hole, 2-first end plate, 21-first screw hole, 3-second end plate, 31-second screw hole, 4-first clamp, 5-second clamp, 6-third clamp and 7-motor rotor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-2, in an embodiment of the present invention, a device for calibrating a magnetic force centerline of a motor includes a connecting plate 1 horizontally disposed, where the connecting plate 1 includes a first fixing section 11 for fixing a motor rotor 7 and a second fixing section 12 for fixing a bearing end cap; a first end plate 2 and a second end plate 3 are vertically welded on the lower end face of the connecting plate 1 at two ends of the first fixing section 11; a first clamp 4 is arranged on the first end plate 2, a second clamp 5 is arranged on the second end plate 3, and a third clamp 6 is arranged at one end of the connecting plate 1 positioned at the second fixing section 12; the first clamp 4 and the second clamp 5 can move back and forth along the length direction of the connecting plate 1, and the third clamp 6 can move back and forth along the thickness direction of the connecting plate 1. The first clamp 4 and the second clamp 5 fix the motor rotor 7 from two shaft ends, and the third clamp 4 fixes the motor rotor from the upper part of the bearing end cover. This first anchor clamps 4, second anchor clamps 5, third anchor clamps 6 are the spring jackscrew, and the periphery of this spring jackscrew is the thread design, and inside cavity has the spring, and the spring top is connected with the hemispherical top of telescopic, and this top contacts with electric motor rotor 7, reduces electric motor rotor 7 and rotates the static friction power that the in-process produced to the axle bush, prevents to move other parts such as adjustment in-process damage axle bush at the dish.

Further, a first screw hole 21 matched with the periphery of the first clamp 4 is formed in the first end plate 2, and the first clamp 4 is in threaded connection with the first screw hole 21; a second screw hole 31 matched with the periphery of the second clamp 5 is formed in the second end plate 3, and the second clamp 5 is in threaded connection with the second screw hole 31; a third screw hole 121 matched with the periphery of the third clamp 6 is formed in the connecting plate 1 positioned on the second fixing section 12, and the third clamp 6 is in threaded connection with the third screw hole 121. The reserved quantity of the two sides of the motor rotor 7 is adjusted by screwing the first clamp 4 and the second clamp 5, so that the magnetic force center line of the motor can be adjusted.

Further, the number of the first clamps 4 is one, and the number of the second clamps 5 is two; the first clamp 4 is approximately directed to the axis of the motor rotor 7, and the second clamp 5 slides relatively along the edge of the motor rotor 7. Therefore, the length of the first end plate 2 is set longer than the second end plate 3. The bearing end cover is positioned on one side of the motor rotor 7, and the bearing end cover and the motor rotor are coaxially arranged. The device is axially fixed by screwing a third clamp 6 downwards into a counter bore of the bearing end cover. The number of the third clamps 6 is two, the two third clamps 6 are symmetrically arranged in the left and right direction of the length direction of the connecting plate 1, the two third clamps 6 are inserted into the bearing end cover preset holes, the whole structure is axially limited, and the whole connecting plate 1 can be prevented from swinging in the width direction. A notch is arranged on the second fixing section 12 between the two third clamps 6, and the notch can avoid a probe and a kss nameplate for detecting the bearing bush parameters.

The utility model discloses when using, at first throw off the shaft coupling of motor, with this school to the device installation, make third anchor clamps 6 insert the preformed hole of bearing end cover, it is spacing to carry out axial displacement to this school to the device. And rotating the first clamp 4 and the second clamp 5 to enable the jacks of the two clamps to be abutted against the two sides of the motor rotor 7, turning the motor rotor, observing the motor magnetic centerline indicator, and if the motor magnetic centerline indicator is not at the magnetic centerline position, adjusting the motor magnetic centerline by rotating the reserved adjustment amount of the spring jackscrews at the two sides to enable the motor magnetic centerline indicator to be superposed with the magnetic centerline mark of the shaft extension end, so that the requirement of the motor magnetic centerline is met.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all the equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.

Claims

1. The motor magnetic force center line correction device is characterized by comprising a connecting plate (1) which is horizontally arranged, wherein the connecting plate (1) comprises a first fixing section (11) for fixing a motor rotor (7) and a second fixing section (12) for fixing a bearing end cover; the lower end faces of the connecting plates (1) positioned at the two ends of the first fixing section (11) are vertically connected with a first end plate (2) and a second end plate (3); a first clamp (4) is arranged on the first end plate (2), a second clamp (5) is arranged on the second end plate (3), and a third clamp (6) is arranged at one end of the connecting plate (1) positioned at the second fixing section (12); the first clamp (4) and the second clamp (5) can move back and forth along the length direction of the connecting plate (1), and the third clamp (6) can move back and forth along the thickness direction of the connecting plate (1).

2. The motor magnetic force center line calibrating device according to claim 1, wherein the first clamp (4), the second clamp (5) and the third clamp (6) are all spring top threads.

3. The motor magnetic force center line proofreading device as claimed in claim 1, wherein the number of the first clamps (4) is one, the number of the second clamps (5) is two, and the number of the third clamps (6) is two.

4. The device for calibrating the magnetic centerline of the motor as claimed in claim 1, wherein the length of the first end plate (2) is longer than the length of the second end plate (3).