CN220381256U - Measuring device for alternating current motor steering - Google Patents

Abstract

The utility model belongs to the technical field of equipment maintenance, and particularly relates to a measuring device for alternating current motor steering, which is characterized by comprising a base, a first gauge outfit, a second gauge outfit, a third gauge outfit and three binding posts, wherein the first gauge outfit, the second gauge outfit and the third gauge outfit are milliampere ampere meters, an A-phase wire connecting post is arranged on the base corresponding to the first gauge outfit, a B-phase wire connecting post is arranged on the base corresponding to the second gauge outfit, a C-phase wire connecting post is arranged on the base corresponding to the third gauge outfit, and the three binding posts are respectively connected with the binding posts of a motor three-phase winding in a matching way. The method comprises the following operation steps: 1) The three-phase binding posts on the device are respectively and randomly connected with the three-phase binding posts of the motor; 2) The manual dial motor rotates, three gauge heads are observed, and the phase sequence names of the gauge heads reaching the maximum deflection angle are sequentially confirmed; 3) And adjusting the sequence of the three-phase binding posts on the motor until the steering of the motor is consistent with the relation of the phase sequence. The beneficial effects of the utility model are as follows: and the frequent power-on test is not needed, and the power consumption is reduced.

Description

Measuring device for alternating current motor steering

Technical Field

The utility model belongs to the technical field of equipment maintenance, and particularly relates to a measuring device for alternating current motor steering.

Background

In general, when a large ac motor fails or is damaged and needs to be replaced, the rotation direction is determined first to connect the load, but after the motor is replaced, we cannot determine the rotation direction of the newly replaced motor, at this time, the coupling of the motor cannot be connected with the load, and the rotation direction of the motor must be tested to connect the load. At this time, the motor is usually wired by an electric person, then power is supplied, the test direction is that when the rotation direction of the motor is inconsistent with the load direction, a three-phase power line is also required to be reconnected, the phase sequence of the power supply is changed, the work is finished, time and labor are often wasted, the time for overhauling and replacing the motor is prolonged, the labor intensity of workers is increased, and adverse effects are brought to the rapid production of the blast furnace.

The utility model patent of China with the application number of 201420261550.4 discloses a phase sequence and steering measuring device of a three-phase motor, which comprises three identical weak voltage signal acquisition circuits, three identical strong voltage acquisition circuits, a square wave circuit, a whole wave circuit, a central processing unit and a display driving circuit, wherein the signal output end of the weak voltage signal acquisition circuit and the signal output end of the strong voltage signal acquisition circuit are connected with three signal input ends of the square wave circuit, the square wave circuit is connected with three signal input ends of the whole wave circuit, the whole wave circuit is connected with the signal input end of the central processing unit, the signal of the central processing unit is connected with the display driving circuit, and the signal of the display driving circuit is connected with the display driving circuit. The scheme can accurately measure the phase sequence and the steering of the three-phase motor winding, and has the defect of complex structure and incapability of being suitable for a maintenance site with low tool configuration.

Disclosure of Invention

The utility model aims to provide a measuring device for alternating current motor steering, which overcomes the defects of the prior art, can realize confirmation of motor phase sequence steering without electrifying test after replacing a motor, reduces power consumption, saves maintenance time and reduces labor intensity of workers. The device has simple structure, safety, reliability and easy operation, creates conditions for quick and normal production, and reduces the iron-making cost.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

the utility model provides a measuring device that alternating current motor turned to, its characterized in that includes base, first gauge outfit, second gauge outfit, third gauge outfit and three terminal, first gauge outfit, second gauge outfit and third gauge outfit are milliampere ammeter, are equipped with A phase wiring post on the base corresponding to first gauge outfit, are equipped with B phase wiring post corresponding to second gauge outfit, are equipped with C phase wiring post corresponding to third gauge outfit, and three terminal respectively with 3000kW below motor three phase winding's terminal matching connection.

The milliampere ammeter is a pointer type direct current ammeter.

The milliamp ammeter is embedded in a panel of the base.

The wiring terminal is an explosion-proof wiring terminal for the fan.

The bottom of the base is provided with an anti-slip adhesive tape.

The panel on the base is a panel with an inclination angle of 30-45 degrees.

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

1) The device provided by the utility model can be used for rapidly utilizing the remanence in the three-phase motor winding to confirm the phase sequence steering of the motor after the motor is replaced, so that frequent power-on tests are not needed, the power consumption is reduced, the maintenance time is saved, and the labor intensity of workers is reduced.

2) The device has simple structure, safety, reliability and easy operation, creates conditions for the rapid recovery of normal production of the blast furnace, and finally achieves the aim of reducing the iron-making cost.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the structural principle of an embodiment of the present utility model;

fig. 3 is a schematic diagram of an application state of an embodiment of the present utility model.

In the figure, a 1-base; 2-a first header; 3-a second header; 4-a third header; 5-A phase connection posts; a 6-B phase connection column; 7-C phase connection posts; 8-measuring device for measuring the steering of the AC motor; 9-a power line; 10-motor.

Detailed Description

The technical solutions of the present utility model will be clearly and fully described below with reference to specific embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the embodiments that are needed in the embodiments or the prior art descriptions, and it is obvious that the embodiments in the following description are some embodiments of the present utility model and that other embodiments may be obtained according to these embodiments without inventive effort for a person skilled in the art.

The components of the embodiments of the present utility model generally described and illustrated in the specific embodiments herein can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as provided in the specific embodiments, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

Fig. 1-2 are schematic structural diagrams of an embodiment of a measuring device for the steering of an alternating current motor, which comprises a base 1, a first meter head 2, a second meter head 3, a third meter head 4 and three binding posts, wherein the first meter head 2, the second meter head 3 and the third meter head 4 are milliampere-meters, an A-phase binding post 5 is arranged on the base 1 corresponding to the first meter head, a B-phase binding post 6 is arranged corresponding to the second meter head, a C-phase binding post 7 is arranged corresponding to the third meter head, and the three binding posts are respectively connected with binding posts of a three-phase winding of the motor in a matching way.

In the embodiment, the three milliampere meters are pointer direct current meters, so that the reaction is sensitive and the observation is convenient. The milliampere ammeter is embedded in the panel of the base 1, and the appearance is clean and clear. The panel on the base 1 is a panel with an inclination angle of 30 degrees, so that the observation is convenient. The three binding posts are explosion-proof binding posts for the fan, and the three binding posts and the motor binding posts are connected in the same way, so that the use is convenient. The bottom of base 1 is equipped with anti-skidding adhesive tape, conveniently places, avoids skidding and removes.

The utility model relates to a measuring device for alternating current motor steering, which specifically comprises the following operation steps:

1) After the motor replacement is finished, the three-phase binding posts on the measuring device 8 for the steering of the alternating current motor are connected with the three-phase binding posts of the motor at will through the power supply line 9, the motor 10 is an operated alternating current permanent magnet motor, and the device works by utilizing the residual magnetism in the permanent magnet; 2) The manual dial motor slowly rotates, the pointer directions of three gauge heads are observed, the first pointer of the gauge heads rotates correspondingly to any one of the phase sequences X, Y or Z corresponding to the three-phase motor, and the phase sequence X, Y, Z corresponding to the three-phase motor is judged according to the pointer rotation directions in sequence; 3) After the phase sequence of the three-phase motor is determined, correspondingly connecting the three-phase power with a three-phase binding post of the 3000kW motor, and replacing the motor. The motor with the power below 3000kW can drive the main shaft, and is applicable.

Referring to fig. 3, an ac motor that has been operated typically has a rotor with remanence, such as by cutting the stator windings with a field of remanence, which produces an induced electromotive force, which is displayed by a dc milliamp meter across, i.e., by predicting motor steering based on motor rotor remanence. When the motor rotor turns slowly and uniformly according to the specified turning by manpower, the motor becomes an ultralow-frequency no-load three-term generator; at this time, three milliampere meter pointers are deflected in forward and reverse alternation by three induced electromotive forces with 120-degree electric angles, but the steps are inconsistent; it can be seen that the milliamp meter hands each time a maximum positive deflection is reached, the sequence, i.e. the phase sequence of the motor stator windings to be measured; when the phase sequence of the connected power supply is the same as the phase sequence of the stator winding of the motor, the motor rotates in the direction of disk rotation.

The device of the utility model is successfully applied to the two 3200m3 blast furnace related motors in the north-camp iron works of the saddle steel group, all the prediction results are accurate, the accuracy of the wiring phase sequence of the motor and the steering accuracy of the motor are ensured through the rapid detection of the steering of the motor, the operation time of replacing the motor and the labor cost are greatly reduced, and precious time is won for rapid production of the blast furnace.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a measuring device that alternating current motor turned to, its characterized in that includes base, first gauge outfit, second gauge outfit, third gauge outfit and three terminal, first gauge outfit, second gauge outfit and third gauge outfit are milliampere ammeter, are equipped with A phase wiring post on the base corresponding to first gauge outfit, are equipped with B phase wiring post corresponding to second gauge outfit, are equipped with C phase wiring post corresponding to third gauge outfit, and three terminal respectively with 3000kW below motor three phase winding's terminal matching connection.

2. The apparatus of claim 1, wherein the milliamp ammeter is a pointer type dc ammeter.

3. The apparatus of claim 1, wherein the milliamp ammeter is embedded in a faceplate of the base.

4. The apparatus for measuring the steering angle of an ac motor as recited in claim 1, wherein said terminal is an explosion-proof terminal for a fan.

5. The device for measuring the steering angle of an alternating current motor according to claim 1, wherein the bottom of the base is provided with an anti-slip adhesive tape.

6. The apparatus according to claim 1, wherein the panel on the base is a panel having an inclination angle of 30 to 45 °.