CN211859820U

CN211859820U - Protective device for three-phase asynchronous motor

Info

Publication number: CN211859820U
Application number: CN202020875915.8U
Authority: CN
Inventors: 赵乐; 王东
Original assignee: Shenyang Electric Machinery Manufacturing Co ltd
Current assignee: Shenyang Electric Machinery Manufacturing Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-11-03
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a protective device for a three-phase asynchronous motor, which comprises a motor, wherein a protective box is arranged outside the motor, the front end of the motor is provided with a driving wheel, the driving wheel is meshed with a driven wheel, one end of a generator is fixedly connected on the driven wheel, the other end of the generator is electrically connected on the protective box, a plurality of air holes are arranged at the inner side of the protective box, brackets are arranged at the two sides of the protective box, a damping device is arranged on the brackets, the damping device comprises an upper supporting end and a lower supporting end, the contact part of the upper supporting end and the lower supporting end is provided with spring damping, the lower supporting end is provided with a lead screw and passes through the upper supporting end, a nut is arranged in the upper supporting end and is screwed on the lead screw, the bottom of the lower supporting end is provided with a base, the utility model can, thereby reducing the noise generated by the vibration.

Description

Protective device for three-phase asynchronous motor

Technical Field

The utility model discloses be applied to industrial technology field, specifically be a protector for three-phase asynchronous motor.

Background

The three-phase asynchronous motor is a kind of induction motor, it is a kind of motor powered by connecting 380V three-phase AC power supply (phase difference 120 deg.) at the same time, because the rotor and stator rotating magnetic field of the three-phase asynchronous motor rotate in the same direction and different rotating speed, there is slip rate, so called three-phase asynchronous motor, after the stator is connected with current, part of the magnetic flux passes through the short circuit ring, and induced current is generated in it, the current in the short circuit ring obstructs the change of the magnetic flux, so that the magnetic flux generated by the short circuit ring part and the non-short circuit ring part has phase difference, thus forming rotating magnetic field, after the power is started, the rotor winding induces electromotive force and current due to the relative movement between the rotor winding and the magnetic field, namely, the rotating magnetic field and the rotor have relative rotating speed, and interact with the magnetic field to generate electromagnetic torque, making the rotor rotate, realizing energy conversion, the commonly used three-phase asynchronous, not only the damage is generated to the motor, but also the working environment is influenced, and the noise pollution is formed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a protector for three-phase asynchronous motor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a protector for three-phase asynchronous motor, includes the motor, the motor outside is equipped with the protective housing, the motor front end is equipped with the action wheel, the meshing is from the driving wheel on the action wheel, the one end of fixed connection generator on the follow driving wheel, generator other end electric connection is in on the protective housing, the protective housing inboard is equipped with a plurality of bleeder vents, the protective housing both sides are equipped with the support, be equipped with damping device on the support, damping device includes support end and lower support end, go up the support end with lower support end contact department is equipped with spring damping, lower support end below is equipped with the lead screw and passes go up the support end, it is in to be equipped with nut and spiro union in the support end on the lead screw, lower support end bottom is equipped with the base.

Preferably, a cooling fan is arranged inside the protective box, a tool box is arranged at the bottom of the protective box, and a grounding drainage wire is arranged on one side of the protective box.

Preferably, the tool box is provided with a handle.

Preferably, the protective box body includes first aluminum alloy layer, graphite lamella and second aluminum alloy layer from top to bottom in proper order, first aluminum alloy layer, graphite lamella and second aluminum alloy layer are through hot pressing technology pressfitting shaping.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a damping device on the protective housing upper bracket can reduce the vibration that three-phase asynchronous motor during operation produced, has strengthened the life of motor to the produced noise of vibration has been reduced.

Drawings

FIG. 1 is a front view of a guard for a three-phase asynchronous motor;

fig. 2 is a left side view of a guard for a three-phase asynchronous motor.

Wherein; the tool box comprises a motor 1, a protective box 2, a driving wheel 3, a driven wheel 4, a handle 5, a generator 6, air holes 7, a support 8, a base 9, a damping device 10, an upper support end 11, a lower support end 12, spring damping 13, a lead screw 14, a nut 15, a cooling fan 16, a grounding drainage wire 17 and a tool box 18.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Referring to fig. 1 to 2, the present invention provides a technical solution: a protection device for a three-phase asynchronous motor comprises a motor 1, a protection box 2 is arranged outside the motor 1, the front end of the motor 1 is provided with a driving wheel 3, the driving wheel 3 is engaged with a driven wheel 4, one end of a generator 6 is fixedly connected with the driven wheel 4, the other end of the generator 6 is electrically connected to the protective box 2, a plurality of air holes 7 are arranged on the inner side of the protective box 2, two sides of the protective box 2 are provided with brackets 8, the brackets 8 are provided with damping devices 10, the damping devices 10 comprise upper supporting ends 11 and lower supporting ends 12, a spring damper 13 is arranged at the contact position of the upper support end 11 and the lower support end 12, a lead screw 14 is arranged below the lower support end 12 and penetrates through the upper support end 11, a nut 15 is arranged in the upper supporting end 11 and is screwed on the screw rod 14, and a base 9 is arranged at the bottom of the lower supporting end 12.

Specifically, a heat dissipation fan 16 is arranged inside the protective box 2, a tool box 18 is arranged at the bottom of the protective box 2, and a grounding drainage wire 17 is arranged on one side of the protective box 2 (the grounding drainage wire is not described herein too much for the prior art).

The air flow near the motor is enhanced when the motor works, the temperature of the three-phase asynchronous motor is reduced when the motor 1 stops working, and the grounding drainage wire is convenient for guiding residual current into the ground.

Specifically, the tool box 18 is provided with a handle 5.

The tool box is convenient to open.

Particularly, 2 bodies of protective box include first aluminum alloy layer, graphite lamella and second aluminum alloy layer from top to bottom in proper order, first aluminum alloy layer, graphite lamella and second aluminum alloy layer are pressed into the type through hot pressing technology layer upon layer.

Because the graphite flake has extremely high heat conduction and radiation coefficient, the formed sandwich-shaped structure of the aluminum alloy-graphite flake-aluminum alloy can effectively improve the longitudinal radiation efficiency of the radiating fin.

Working principle; the motor 1 is started firstly, the motor 1 drives the driving wheel 3 while working, the driving wheel 3 drives the driven wheel 4, and finally the generator 6 is driven, the current generated by the generator 6 is transmitted to the heat dissipation fan 16 on the protection box 2, the heat generated by the motor 1 is discharged through the air holes 7 on the protection box 2, and the vibration generated by the motor 1 can be weakened through the damping device 10 on the bracket 8.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A protection device for three-phase asynchronous motors, comprising a motor (1), characterized in that; the electric motor is characterized in that a protective box (2) is arranged outside the electric motor (1), the front end of the electric motor (1) is provided with a driving wheel (3), the driving wheel (3) is meshed with a driven wheel (4), one end of a generator (6) is fixedly connected with the driven wheel (4), the other end of the generator (6) is electrically connected with the protective box (2), a plurality of air holes (7) are formed in the inner side of the protective box (2), supports (8) are arranged on two sides of the protective box (2), a damping device (10) is arranged on each support (8), each damping device (10) comprises an upper support end (11) and a lower support end (12), spring damping (13) is arranged at the contact part of the upper support end (11) and the lower support end (12), a lead screw (14) is arranged below the lower support end (12) and penetrates through the upper support end (11), a nut (15) and a bolt are arranged in the upper support end (11), the bottom of the lower supporting end (12) is provided with a base (9).

2. A protector for a three-phase asynchronous motor according to claim 1, characterized in that; the radiator fan (16) is arranged inside the protective box (2), the tool box (18) is arranged at the bottom of the protective box (2), and the grounding drainage wire (17) is arranged on one side of the protective box (2).

3. A protector for a three-phase asynchronous motor according to claim 2, characterized in that; the tool box (18) is provided with a handle (5).

4. A protector for a three-phase asynchronous motor according to claim 1, characterized in that; the protective box (2) body comprises a first aluminum alloy layer, a graphite sheet layer and a second aluminum alloy layer from top to bottom in sequence, and the first aluminum alloy layer, the graphite sheet layer and the second aluminum alloy layer are pressed and molded through a hot pressing process.