CN219592209U

CN219592209U - Efficient heat dissipation three-phase asynchronous motor

Info

Publication number: CN219592209U
Application number: CN202320794316.7U
Authority: CN
Inventors: 邓观贞; 刘昌民; 王准
Original assignee: Weihai Juli Micro Motor Co ltd
Current assignee: Weihai Juli Micro Motor Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-08-25
Anticipated expiration: 2033-04-07

Abstract

The utility model provides a three-phase asynchronous motor with high-efficiency heat dissipation, which solves the technical problem of poor heat dissipation of the existing three-phase asynchronous motor; the stator core is embedded with windings, the rotor core and the rotating shaft; the front flange is connected with the front end of the stator core, and the rear cover is connected with the rear end of the stator core; the rear end of the rotating shaft is connected with the rear cover through a bearing. The utility model is widely applied to the technical field of three-phase asynchronous motors.

Description

Efficient heat dissipation three-phase asynchronous motor

Technical Field

The utility model relates to a high-frequency three-phase asynchronous motor, in particular to a high-efficiency heat-dissipation three-phase asynchronous motor.

Background

The ground screw is fixed on the ground through the screwing machine, and the ground screw is used as a pile foundation on which a plurality of houses or buildings are covered, so that the trend of the modern society is that the ground screw is used as a trend. However, the motor used by the screwing machine is a single-phase series excited motor, only a single-phase power supply can be used for driving operation, carbon brush friction sparks are accompanied in the operation process, the required torque is gradually increased along with the depth of the ground screw penetrating into the ground, the rotating speed of the single-phase series excited motor is quickly reduced, and the working efficiency is greatly reduced. In addition, for places with industrial electricity, the screwing machine with the scheme cannot be used, and the screwing machine driven by a three-phase power supply is required to be purchased, so that the fund waste is caused.

The high-frequency three-phase asynchronous motor of the ground screw tightening machine driven by the frequency converter has better mechanical characteristics than a series excited motor, spare parts do not need to be replaced, the service life is greatly prolonged, the working efficiency is improved, the speed change work is carried out by changing the frequency of the frequency converter, and the multi-working-condition use of customers is met. However, the higher the frequency is, the higher the motor rotation speed is, the higher the power in unit time is, and the larger the heat dissipation requirement is, so that a special three-phase asynchronous motor with high-efficiency heat dissipation for the cyclone machine is urgently needed.

Disclosure of Invention

In order to solve the problem of poor heat dissipation of the existing three-phase asynchronous motor, the utility model adopts the following technical scheme: the three-phase asynchronous motor with high-efficiency heat dissipation comprises a stator core embedded with windings, a rotor core and a rotating shaft; the front flange is connected with the front end of the stator core, and the rear cover is connected with the rear end of the stator core; the rear end of the rotating shaft is connected with the rear cover through a bearing.

Preferably, the rear cover is provided with a plurality of ventilation holes.

Preferably, an axial flow fan blade is sleeved on the rotating shaft between the stator core and the rear cover.

Preferably, the front end and the rear end of the rotor core are connected with rotor end rings, and the rotor end rings at the front end are also connected with rotor blades.

Preferably, a ventilation path is provided in the length direction of the rotor core.

Preferably, the outer side of the rear cover is connected with a waterproof rain cover, and the waterproof rain cover can at least shield the vent hole of the rear cover; a gap exists between the waterproof rain cover and the edge of the rear cover.

Preferably, a skirt is circumferentially and outwardly expanded on one side of the front flange away from the rear cover.

Preferably, the windings are high fundamental frequency windings with a nominal frequency of 200Hz-1000Hz.

Preferably, the middle part of the rear cover is connected with a corrugated gasket, and the corrugated gasket is connected with the rotating shaft through a bearing.

The utility model has the beneficial effects of simple structure, ingenious design, no set of shell and no problem of heating of the motor caused by eddy current loss of the shell. The ventilation path of the front flange and the rotor core, the axial flow fan blade and the ventilation hole of the rear cover are additionally arranged to form a heat dissipation path, so that the air circulation with the outside air is accelerated, and the rapid heat dissipation is realized. In order to prevent rainwater from entering the motor, a waterproof rain cover and a skirt of a front flange are further arranged.

Drawings

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

FIG. 1 is a schematic perspective view of the present utility model (flange connection to a speed reducer);

FIG. 2 is a schematic view of the waterproof rain cover end of FIG. 1;

FIG. 3 is a schematic cross-sectional view of B-B of FIG. 2;

FIG. 4 is a schematic diagram of the flow direction of the present utility model.

The symbols in the drawings illustrate:

1. a stator core; 2. a rotor core; 3. a rotating shaft; 4. a front flange; 5. a rear cover; 6. axial flow fan blades; 7. a rotor end ring; 8. rotor blade; 9. a ventilation path; 10. waterproof rain cover; 11. a winding; 12. a connecting rod; 13. a corrugated gasket; 14. a vent hole; 15. a speed reducer flange; 16. and (5) skirt swinging.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The three-phase asynchronous motor with high-efficiency heat dissipation provided by the embodiment of the utility model is explained.

Referring to fig. 1, 2 and 3, the structure of the high-efficiency heat dissipation three-phase asynchronous motor is shown, and the high-efficiency heat dissipation three-phase asynchronous motor comprises a stator core 1 embedded with a winding 11, a rotor core 2, a rotating shaft 3, a front flange 4 connected with the front end of the stator core 1, a rear cover 5 connected with the rear end of the stator core 1, and the front flange 4 and the rear cover 5 are connected through a connecting rod 12; the rear end of the rotating shaft 3 is connected with a rear cover 5 through a bearing. The surface of the stator core 1 is provided with no shell, so that the situation that the temperature of the shell is high due to high-frequency eddy current loss, which is unfavorable for the heat dissipation of the stator core 1, can be avoided, and the weight can be reduced. Specifically, the middle part of the rear cover 5 is connected with a corrugated washer 13, and the corrugated washer 13 is connected with the rotating shaft 3 through a bearing.

Further, the rear cover 5 is provided with a plurality of ventilation holes 14 for heat dissipation. Further, an axial flow fan blade 6 is sleeved on the rotating shaft 3 between the stator core 1 and the rear cover 5, and air flow can pass through the middle of the axial flow fan blade 6.

In one embodiment, the front and rear ends of the rotor core 2 are connected with rotor end rings 7, and the front end rotor end rings 7 are also connected with rotor blades 8. The rotor blade 8 is arranged on one side of the rotor core 2 only, which is beneficial to air flow formation.

In one embodiment, a ventilation path 9 is arranged in the length direction of the rotor core 2, and the ventilation path 9 forms a heat dissipation path with the axial flow fan blade 6 and the ventilation hole 14 of the rear cover 5 to form air circulation with external air.

The outside of the rear cover 52 is connected with a waterproof rain cover 10, and the waterproof rain cover 10 can at least shield the ventilation hole 14 of the rear cover 5. A gap exists between the waterproof rain cover 10 and the edge of the rear cover 5, and the air flow inside the motor can be communicated with the outside air from the vent hole 14 of the rear cover 5. When the waterproof rain cover 10 of the three-phase asynchronous motor is connected with the screwing machine for use, the waterproof rain cover 10 is located above, and can shield rainwater and prevent the rainwater from entering the motor.

Further, the other end of the rotating shaft 3 is sleeved with a bearing for being matched with a speed reducer flange 15 of the screwing machine; the front flange 4 is intended to be connected to a speed reducer flange 15 of a screwing machine. The three-phase asynchronous motor is directly connected with the speed reducer, so that the loss of intermediate transmission is reduced. Specifically, the front flange 4 and the speed reducer flange 15 of the screwing machine are matched and positioned through the bolt connection.

An air flow passage is arranged between the front flange 4 and the speed reducer flange 15, and is communicated with the heat dissipation path to jointly form an air flow circulation (refer to fig. 4).

In one embodiment, a skirt 16 is circumferentially and outwardly expanded on the side of the front flange 4 remote from the rear cover, so as to prevent rainwater from entering the interior between the front flange 4 and the speed reducer flange 15.

In one embodiment, the winding 11 is a high fundamental frequency winding rated at 200Hz-1000Hz. The power density of the motor is improved through high frequency, so that the power of the motor is greatly improved under the condition of the same volume.

The utility model has simple structure and ingenious design, does not arrange a shell, and can not generate heat of the motor due to eddy current loss caused by the shell. The ventilation path of the front flange and the rotor core, the axial flow fan blade 6 and the ventilation hole 14 of the rear cover are additionally arranged to form a heat dissipation path, so that the air circulation with the outside air is accelerated, and the rapid heat dissipation is realized. In order to prevent rainwater from entering the motor, a waterproof rain cover 10 and a skirt 16 of the front flange 4 are also arranged.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. A high-efficient radiating three-phase asynchronous motor, including stator core, rotor core and spindle of the embedded winding; the method is characterized in that: the outside is not provided with a shell; the stator core comprises a stator core, a stator core and a stator cover, and is characterized by further comprising a front flange connected with the front end of the stator core and a rear cover connected with the rear end of the stator core, wherein the front flange is connected with the rear cover through a connecting rod; the rear end of the rotating shaft is connected with the rear cover through a bearing.

2. The high efficiency heat dissipating three phase asynchronous motor of claim 1, wherein: the rear cover is provided with a plurality of ventilation holes.

3. The high efficiency heat dissipating three phase asynchronous motor of claim 2, wherein: an axial flow fan blade is sleeved on a rotating shaft between the stator core and the rear cover.

4. A high efficiency heat dissipating three phase asynchronous motor as claimed in any one of claims 1 to 3 wherein: the front end and the rear end of the rotor core are connected with rotor end rings, and the rotor end rings at the front end are also connected with rotor blades.

5. The high efficiency heat dissipating three phase asynchronous motor of claim 4, wherein: and a ventilation path is arranged in the length direction of the rotor core.

6. The high efficiency heat dissipating three phase asynchronous motor of claim 2, wherein: the outer side of the rear cover is connected with a waterproof rain cover which can at least shield the vent hole of the rear cover; and a gap exists between the waterproof rain cover and the edge of the rear cover.

7. The high efficiency heat dissipating three phase asynchronous motor of claim 1, wherein: and a skirt is circumferentially and outwardly expanded on one side of the front flange, which is far away from the rear cover.

8. The high efficiency heat dissipating three phase asynchronous motor of claim 1, wherein: the winding is a high-fundamental-frequency winding, and the rated frequency is 200Hz-1000Hz.

9. The high efficiency heat dissipating three phase asynchronous motor of claim 1, wherein: the middle part of the rear cover is connected with a corrugated washer, and the corrugated washer is connected with the rotating shaft through a bearing.