CN212726688U - Motor junction box and motor - Google Patents

Abstract

The utility model discloses a motor terminal box and motor, motor terminal box include metal casing, metal casing is equipped with the wiring piece mouth that is used for settling the wiring piece of motor, still including cover in the at least one deck insulation shielding layer of metal casing inner wall. The utility model discloses under the structural strength of guarantee motor terminal box and the condition of insulating effect, reduce the volume of motor terminal box, save material. The motor junction box occupies less space of the machine set, is beneficial to the simple and easy operation of pipe arrangement and wire arrangement of the machine set, and saves pipelines and routing.

Description

Motor junction box and motor

Technical Field

The utility model relates to a motor field especially relates to a motor terminal box and motor.

Background

The high-voltage frequency conversion centrifugal machine set adopts a high-speed and high-voltage permanent magnet synchronous motor of 10KV and the like, a high-voltage power supply of 10KV and the like is directly transmitted to a compressor motor by a high-voltage frequency converter, and a motor junction box is arranged at a wiring board of the compressor motor.

The structure of the existing motor junction box is a square box-shaped structure formed by bending a single-layer stainless steel plate, and the structure is convenient and simple to process and low in cost, and can prevent eddy current to a certain extent. Because the compressor is charged by high voltage such as 10KV, the size of the junction box of the high-voltage motor needs to fully consider that the electrical safety distances h, i and j respectively satisfy h is more than or equal to delta h, i is more than or equal to delta i and j is more than or equal to delta j, so that the risk of electric leakage is avoided. Compared with a low-voltage centrifugal unit, the high-voltage motor junction box of the high-voltage direct frequency conversion centrifugal unit is much larger in overall dimension than the low-voltage centrifugal unit motor junction box.

Therefore, in consideration of safety, the motor junction box of the high-pressure centrifugal unit has to be designed to be large, but adverse effects are brought, the motor junction box is designed to be too large, a large amount of assembly space of the unit is occupied, and the unit pipeline tends to be complex and long. In some cases, the mechanical interface design of the compressor of the unit is already established, and in order to avoid the assembly of pipelines/valves and the like, the motor junction box needs to be designed into an irregular geometric shape, so that the processing of the motor junction box is complicated, and the appearance of the whole unit is influenced.

Therefore, how to design a motor junction box which occupies a small assembly space so as to avoid complex and redundant unit pipelines and consider the unit attractive appearance is an urgent technical problem in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve among the above-mentioned prior art motor terminal box and occupy the big technical problem of fitting space, provide a motor terminal box and motor.

The utility model adopts the technical proposal that:

the utility model discloses at first provide a motor terminal box, including metal casing, metal casing is equipped with the wiring piece mouth that is used for settling the wiring piece of motor, still including cover in the at least one deck insulation shield layer of metal casing inner wall.

In one embodiment, the insulation shield layer is an insulation shield plate.

In one embodiment, the insulating shield plate is an epoxy insulating plate.

In one embodiment, the metal housing is a cuboid comprising a top wall, a bottom wall, a left side wall, a right side wall, a front side wall and a rear side wall; the insulation shielding plate comprises a top plate, a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate, which are respectively attached to the top wall, the bottom wall, the left side wall, the right side wall, the front side wall and the rear side wall of the metal shell.

In one embodiment, the insulating shield layer is an insulating coating.

In one embodiment, the coating of the insulating coating is an epoxy coating.

In one embodiment, a wire passing hole is further provided.

In one embodiment, a rubber ring is arranged on the wire passing hole.

In one embodiment, the metal housing is made of stainless steel.

The utility model also provides a motor, it includes foretell motor terminal box.

Compared with the prior art, the utility model has the advantages of as follows.

Firstly, an insulating shielding layer is arranged on the inner wall of the metal shell, the insulating capability of the motor junction box is improved through the insulating shielding layer, and the propagation of electric arcs can be effectively prevented. Therefore, under the condition of ensuring the structural strength and the insulation effect of the motor junction box, the size of the motor junction box is reduced, so that the purpose of reducing the occupied unit space of the motor junction box is achieved, the convenience and easiness in unit pipe arrangement and wire arrangement are facilitated, and pipelines and wiring are saved. The novel LED lamp is cuboid, simple in structure, easy to process and manufacture and attractive and elegant.

And secondly, the insulating capability of the motor junction box is further increased by arranging the multiple layers of insulating shielding plates and selecting the epoxy resin insulating plates, the volume of the motor junction box is further reduced, and the electrical safety performance is improved.

And thirdly, the rubber ring is arranged on the wire passing hole, so that the damage of the wire passing scratch is avoided, the wire passing is protected, and the electrical safety performance of the motor junction box is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic perspective view of a motor junction box according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along the A-A plane of the motor and its motor junction box of FIG. 2;

fig. 4 is a sectional view of the motor and its motor junction box of fig. 2 taken along plane B-B.

Description of reference numerals: 1. a motor junction box; 11. a rubber ring; 12. a wiring piece port; 2. a motor; 21. and a wiring piece.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, the present invention first provides a motor junction box 1. This motor terminal box 1 is used for motor 2, specifically, motor terminal box 1 covers motor 2's wiring piece 21, prevents that motor 2's wiring piece 21 department electric leakage from causing the injury to the human body, promotes motor 2's electrical safety. Particularly for high voltage machines 2. This motor junction box 1 includes: a metal shell and at least one insulating shielding layer (not shown) covering the inner wall of the metal shell. The metal housing is provided with a connection piece opening 12, the connection piece opening 12 being used for accommodating a connection piece 21 of the high-voltage motor 2. Correspondingly, the insulation shielding layer is provided with an opening corresponding to the wiring piece opening 12. The inner wall of the metal shell is covered with the insulation shielding layer, the insulation capability of the motor junction box 1 is improved through the insulation shielding layer, and the propagation of electric arcs can be effectively prevented. Therefore, under the condition of ensuring the structural strength and the insulation effect of the motor junction box 1, the size of the motor junction box 1 can be reduced, so that the purpose that the motor junction box 1 occupies the unit space is achieved, the unit wiring and arranging wire are facilitated, the operation is simple and easy, and the pipeline and the wiring are saved.

Preferably, the metal shell is made of stainless steel. The stainless steel is corrosion resistant and the hardness is high to the structural strength of motor terminal box 1 is improved in the guarantee. Alternatively, the metal case may be made of iron or the like. The metal shell is cuboid. The cuboid is composed of a top wall, a bottom wall, a left side wall, a right side wall, a front side wall and a back side wall. The novel LED lamp is cuboid, simple in structure, easy to process and manufacture and attractive and elegant. Alternatively, the metal housing may be spherical or the like.

In one embodiment, the insulating shielding layer covers the inner wall of the metal shell. Preferably, the insulating shielding layer covers the inner wall of the metal shell completely, so that no dead angle and no gap are shielded, and the insulating effect is improved. Optionally, the insulating shielding layer is an insulating shielding plate. The thickness of the insulating shielding plate is uniform, so that the insulating shielding plate is convenient to process, manufacture and assemble. In a preferred embodiment, the thickness of the insulating shield is different, which is designed differently depending on the magnitude of the potential in the motor terminal box. In the region where the potential is large, the thickness of the insulating shield plate is set thick. In the region where the potential is small, the thickness of the insulating shield plate is set thin. Optionally, the insulating shield plate is adhered to the inner wall of the metal housing by glue. Alternatively, the insulating shield plate may also be mounted on the inner wall of the metal shell by means of screws/nuts. Specifically, one end of the screw/nut connected with the insulation shielding plate is only connected to one side of the insulation shielding plate attached to the metal shell, so that the screw/nut cannot penetrate through the insulation shielding plate to prevent current from being transmitted to the metal shell through the screw/nut. Preferably, the insulating shield plate is an epoxy insulating plate. The epoxy resin has the advantages of high dielectric property, surface electric leakage resistance and electric arc resistance, and can effectively prevent electric leakage. And the paint has excellent chemical stability, can resist acid and alkali, and can adapt to different severe environments. In addition, the epoxy resin insulation board can not be easily deformed and has good dimensional stability when being in a high-temperature closed motor junction box for a long time. Alternatively, the material of the insulating shielding plate may be other insulating materials.

The insulation shielding plate comprises a top plate, a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate which are respectively attached to the top wall, the bottom wall, the left side wall, the right side wall, the front side wall and the rear side wall of the metal shell.

The insulating shielding plate can be arranged into one layer, and the insulating shielding plate can also be arranged into multiple layers. For example, two or three layers. The multilayer insulation shielding plates can be arranged closely and also can be arranged at intervals, and the insulation capacity of the multilayer insulation shielding plates is improved, so that the size of the motor junction box 1 can be further reduced.

In further embodiments, the insulating shield layer is an insulating coating. The paint of the insulating coating is epoxy resin paint. The insulating coating is directly coated on the inner wall of the metal shell, and viscose glue or auxiliary connection of a screw and a nut is not needed. Insulating coating layer can with metal casing do not have dead angle, seamless perfect laminating, promote insulating effect. Compared with an insulating shielding plate, the space of the motor junction box 1 occupied by the insulating shielding plate can be further saved, and the volume of the motor junction box 1 is reduced.

As shown in fig. 1, the metal shell and the insulation shielding layer are respectively provided with a wire connector port 12. The position of the terminal opening 12 matches the position of the terminal 21, the terminal opening 12 being rectangular. The terminal block opening 12 has one opening for mounting on the housing of the motor 2 around the terminal block 21, and the terminal block 21 extends from the terminal block opening 12 into the motor junction box 1. In another embodiment, the size of the shape of the terminal openings 12 is matched to the size of the shape of the terminal pieces 21, and the number of terminal openings 12 is equal to the number of terminal pieces 21.

As shown in fig. 1, the metal shell and the insulating shielding layer are further respectively and correspondingly provided with wire passing holes. The wire passing hole is provided with a rubber ring 11. Through set up rubber circle 11 on crossing the line hole, avoid crossing the line hole scratch damage and alternate the line of crossing wherein, play the guard action to crossing the line, further promote the electric safety performance of motor terminal box 1.

As shown in fig. 2-4, the present invention further provides a motor 2, and the motor 2 may be a high voltage motor 2. The motor junction box 1 is arranged at the wiring piece 21 of the motor 2. The connection member 21 is a part of the motor 2 for electrically connecting an external power source, and the connection member 21 may be a terminal provided with a nut for mounting an external power line. The number of terminal elements 21 is set according to the phase of the electric machine 2. Specifically, the terminal block port 12 corresponds to the terminal block 21, and the motor terminal block 1 is fixed to the housing of the motor 2 by screws. Through setting up in motor wiring piece department the utility model discloses a motor terminal box 1 can be more effectual the propagation of the electric arc that prevents the unexpected production of wiring piece. Under the condition of guaranteeing structural strength and insulating effect of motor terminal box 1, reach the purpose that reduces motor terminal box 1 and occupy the unit space, be of value to unit stringing winding displacement, simple accurate saves the pipeline and walks the line.

Compared with the prior art, the utility model has the advantages of as follows.

Firstly, an insulating shielding layer is arranged on the inner wall of the metal shell, the insulating capability of the motor junction box 1 is improved through the insulating shielding layer, and the propagation of electric arcs can be effectively prevented. Therefore, under the condition of ensuring the structural strength and the insulation effect of the motor junction box 1, the size of the motor junction box 1 is reduced, so that the purpose of reducing the occupied unit space of the motor junction box 1 is achieved, the convenience and easiness in unit piping and arranging are facilitated, and pipelines and wiring are saved. The novel LED lamp is cuboid, simple in structure, easy to process and manufacture and attractive and elegant.

And secondly, the insulating capability of the motor junction box 1 is further improved by arranging a plurality of layers of insulating shielding plates and selecting epoxy resin insulating plates, the size of the motor junction box 1 is further reduced, and the electrical safety performance is improved.

And thirdly, the rubber ring 11 is arranged on the wire passing hole, so that the damage of the wire passing scratch is avoided, the wire passing is protected, and the electrical safety performance of the motor junction box 1 is further improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a motor junction box, includes metal casing, metal casing is equipped with the wiring piece mouth that is used for settling the wiring piece of motor, characterized by still including cover in at least one deck insulation shield layer of metal casing inner wall.

2. The motor junction box of claim 1 wherein said dielectric shield is a dielectric shield plate.

3. The motor junction box of claim 2, wherein said insulating shield plate is an epoxy insulating plate.

4. The motor junction box of claim 3 wherein said metal housing is a rectangular parallelepiped comprising a top wall, a bottom wall, a left side wall, a right side wall, a front side wall and a rear side wall; the insulation shielding plate comprises a top plate, a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate, which are respectively attached to the top wall, the bottom wall, the left side wall, the right side wall, the front side wall and the rear side wall of the metal shell.

5. The motor junction box of claim 1 wherein said insulating shield is an insulating coating.

6. The motor junction box of claim 5 wherein the coating of said insulative coating is an epoxy coating.

7. The motor junction box of claim 1 further comprising a wire passing hole.

8. The motor junction box of claim 7, wherein a rubber ring is provided on the wire through hole.

9. The motor junction box of claim 1 wherein said metal housing is stainless steel.

10. An electrical machine, characterized in that it is provided with a motor junction box according to any one of claims 1-9.

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