CN201717708U - Explosion-proof motor - Google Patents

Abstract

The utility model relates to an explosion-proof electric motor, which is mainly characterized in that: a shaft end sealing groove is arranged on the outer end surface of the outer cover, and a shaft end sealing ring and a protective cover are arranged in the shaft end sealing groove and connected to the rotating shaft through the installation. An annular sealing groove is provided on the joint end surface of the cover and the end cover, and a sealing ring is installed in the sealing groove, and a bolt sealing groove and a bolt sealing ring are provided at the bolt holes on the outer end surface of the end cover. The motor can increase the dynamic protection ability, reduce friction loss, achieve the purpose of high protection and low loss at the shaft penetration, and make the protection level reach IP66 protection level, and can meet the Y-Δ conversion at the same time, so that the same motor can adapt to several different The effect of voltage and frequency usage.

Description

An explosion-proof motor

technical field

The utility model belongs to the technical field of motors and is an explosion-proof motor. the

Background technique

In the known technology, the explosion-proof motor usually adopts a flameproof joint surface structure between the end cover and the casing, between the junction box and the motor casing, and at the junction of the junction box seat and the junction box cover, so as to achieve insulation. The purpose of explosion. These motors have major defects: First, the sealing level is low, which can only reach IP55 level, and cannot meet the explosion-proof requirements in harsh environments, especially the connection between the shaft end cover and the end cover and the joint between the rotor shaft and the cover are easily affected by dust. The intrusion of water and water will affect the normal operation of the motor; the second is that the wiring method of the main junction box is single, and one motor can only be used in a power grid with one voltage and frequency, which cannot adapt to the requirements of the power grid with various power conditions. Moreover, the temperature measuring and heating wiring of the motor is arranged outside the main junction box, which complicates the overall structure of the motor and the explosion-proof sealing structure. the

Utility model content

The purpose of the utility model is to provide an explosion-proof motor with high sealing level, good explosion-proof effect, low vibration and noise, and can adapt to the needs of different voltages and frequencies. the

The technical solution adopted to realize the purpose of this utility model is: the motor includes a rotating shaft, a housing, a main junction box, an end cover, a rotor, a stator and an outer cover, and the outer cover is mounted on the shaft extension end of the rotating shaft, and passes through the end cover. Bolt connection, wherein, the outer end surface of the outer cover is provided with a shaft end sealing groove, the shaft end sealing ring and the protective cover are provided in the shaft end sealing groove, and the shaft end sealing ring and the protective cover are installed and connected with the rotating shaft, and the joint end surface of the outer cover and the end cover is provided with There is an annular sealing groove, a sealing ring is installed in the sealing groove, a bolt sealing groove and a bolt sealing ring are provided at the bolt hole on the outer end surface of the end cover, and there are 10 wiring terminals on the wiring board equipped in the main junction box, 6 of which are wiring terminals. The terminals are connected to the motor lead wires, 2 terminals are connected to the temperature measurement signal transmission line, and the other 2 terminals are connected to the heating lead wires. the

The shaft end sealing ring is in interference fit with the rotating shaft and rotates together with the rotating shaft. the

A waterproof flange is provided on the outer circumference of the sealing groove at the shaft end. the

The diameter of the protective cover is larger than the outer diameter of the waterproof flange. the

The outer peripheral wall of the housing is provided with four groups of cooling fins respectively arranged in parallel, and the outer profile cross-section of the cooling fins adopts an octagonal structure. the

The beneficial effect of the explosion-proof motor made according to the above scheme is:

1) Through the seal of the shaft surface at the shaft extension end and the seal of the joint between the outer cover and the end cover, not only can the water be thrown away, the dynamic protection ability can be increased, but also the friction loss can be reduced, so as to achieve the purpose of high protection and low loss at the shaft penetration. Make the protection level reach IP66 protection level. the

2) Through the improvement of the wiring method of the main junction box, it can meet the Y-Δ conversion at the same time. Under the condition of the power grid, the same motor can not only meet the power grid with a rated voltage of 400V and a rated frequency of 50Hz, but also at 60Hz and voltage It can also be used not at 400V, so that the same motor can be adapted to several different voltages and frequencies, and can be applied to different power supply grids. the

3) The cooling fins of the motor housing are arranged in four groups in parallel, and the cross-section of the outer profile adopts an octagonal structure, which not only has a beautiful appearance, but also achieves the effect of increasing protection and reducing vibration and noise. the

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the enlarged schematic view of the partial structure of embodiment one I in Fig. 1;

Fig. 4 is an enlarged schematic diagram of a partial structure of Embodiment 2 I in Fig. 1 . the

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, the explosion-proof motor of the present invention includes a rotating shaft 1, a casing 2, a main junction box 3, an end cover 4, a rotor 6, a stator 5 and an outer cover 7, wherein the outer cover 7 wears Installed on the shaft extension end of the rotating shaft 1, and connected with the end cover 4 by bolts. An annular sealing groove 18 is provided on the end surface where the outer cover 7 and the end cover 4 are joined, and a sealing ring 19 is installed in the sealing groove 18, and a bolt sealing groove 16 and a bolt sealing ring 17 are provided on the bolt hole of the outer end surface of the end cover 4, and the bolt sealing ring 17 is located in the bolt sealing groove 16, and is connected with the bolt wear, can prevent dust and sewage from entering the motor along the bolt hole. The outer end surface of the outer cover 7 is provided with a shaft end seal groove 15, and the shaft end seal groove 15 is provided with a shaft end seal ring 13 and a protective cover 14 that are connected to the rotating shaft 1, and the shaft end seal ring 13 is connected to the rotating shaft 1 Interference fit and rotate together with shaft 1. When the motor adopts the vertical installation with the shaft extending upward (see the second embodiment of Fig. 4), a waterproof flange 20 can be arranged on the outer circumference of the shaft end sealing groove 15, and the diameter of the protective cover 14 can be increased to make it Larger than the outer diameter of the waterproof flange 20, the protective cover 14 and the waterproof flange 20 form a curved road protection, and at the same time, the axial surface sealing lip of the shaft end sealing ring 13 is attached to the smooth inner wall of the shaft end sealing groove 15, which can withstand high pressure water column Effective sealing is achieved under the injection pressure. The centrifugal force generated when the shaft end sealing ring 13 and the protective cover 14 rotate with the rotating shaft 1 can not only shake off the water, increase the dynamic protection ability, but also reduce friction loss, achieve the purpose of high protection and low loss at the shaft penetration, and make the protection level Reach IP66 protection level. The wiring board 11 equipped in the main junction box 3 is provided with 10 wiring terminals, of which 6 wiring terminals 10 are connected to the motor lead wires, 2 wiring terminals 9 are connected to the temperature measurement signal transmission line, and the other 2 wiring terminals 8 Connect with heater lead. This kind of main junction box 3 can meet the Y-Δ conversion at the same time. Under the condition of the power grid, the same motor can not only meet the power grid with a rated voltage of 400V and a rated frequency of 50Hz, but also can be used at 60Hz and the voltage is not 400V. Achieve the effect that the same motor can adapt to the use of several different voltages and frequencies, and can be applied to different power supply grids. There are four sets of cooling fins 12 arranged in parallel on the outer peripheral wall of the housing 2. The outer profile cross-section of the cooling fins 12 adopts an octagonal structure, which can achieve the effect of increasing protection and reducing vibration and noise. the

Claims (5)

1. An explosion-proof motor, the motor comprises a rotating shaft, a housing, a main junction box, an end cover, a rotor, a stator and an outer cover, and the outer cover is worn on the shaft extension end of the rotating shaft, and is connected with the end cover by bolts, and is characterized in that : The outer end surface of the outer cover is provided with a shaft end sealing groove, and the shaft end sealing groove is provided with a shaft end sealing ring and a protective cover connected with the rotating shaft, and an annular sealing groove is arranged on the joint end surface of the outer cover and the end cover , the sealing groove is equipped with a sealing ring, the bolt hole on the outer end face of the end cover is provided with a bolt sealing groove and a bolt sealing ring, and there are 10 wiring terminals on the wiring board equipped in the main junction box, of which 6 wiring terminals are connected to the motor lead Wiring connection, 2 wiring terminals are connected to the temperature measurement signal transmission line, and the other 2 wiring terminals are connected to the heating lead wire. 2. The explosion-proof motor according to claim 1, characterized in that: the shaft end sealing ring is in interference fit with the rotating shaft and rotates together with the rotating shaft. 3. The explosion-proof motor according to claim 1, characterized in that: a waterproof flange is provided on the outer circumference of the sealing groove at the shaft end. 4. The explosion-proof motor according to claim 1, characterized in that: the diameter of the protective cover is larger than the outer diameter of the waterproof flange. 5. The explosion-proof motor according to claim 1, characterized in that four groups of cooling fins arranged in parallel are provided on the outer peripheral wall of the housing, and the outer profile cross-section of the cooling fins adopts an octagonal structure.

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