CN201577008U - Explosion-proof type tri-phase asynchronous motor - Google Patents

Abstract

The utility model discloses an explosion-proof tri-phase asynchronous motor which comprises a casing, a stator and a rotor arranged in the casing; both ends of the casing are fixedly connected with a front end cover and a rear end cover, both ends of the rotor respectively draw out from the front end cover and the rear end cover, a fan brake wheel is mounted on the end of the rotor drawing out from the rear end cover, and an integral end shield matched with the rear end cover is fixed on the rear end cover. The rear end cover is integrated with a closed cover into a whole by the end shield, so a part is saved and the explosion-proof positions required by the motor are reduced and the explosion-proof safety is improved; the assembly procedures of motor production are reduced, the total weight of the motor is reduced, the source material and manufacturing cost are reduced, and the economic benefit is improved.

Description

A kind of flame-proof type threephase asynchronous

Technical field

The utility model relates to the lifting motor that opens on a kind of crane, relates in particular to the flame-proof type threephase asynchronous that a kind of environment for use has requirement of explosion proof.

Background technology

The rotor three-phase asynchronous motor of flame-proof type as shown in Figure 1, is provided with conical stator 12, rotor 13 in casing 11, casing 11 front and back are respectively equipped with front end housing 14 and rear end cap 15.When electrical power, the magnetic force that acts on the rotor 13 can be divided into radial and axial two component, and under the effect of axial tension, motor produces axial displacement, compression is installed on the spring 16 on the rotor 13, makes fan braked wheel 17 break away from end shield 18 and operation automatically.After the motor outage, axial tension disappears, and under the elastic force effect, rotor 13 produces reverse displacement, and fan braked wheel 17 is contacted with end shield 18, produces braking moment, forces motor to stop operating.And the flame proof function of existing motor is generally explosion-proof by add a stifle 19 outside end shield 18, because end shield 18 and stifle 19 are two parts that are separated from each other, motor needs the position of flame proof many again, thereby makes motor assembling difficulty, and has also improved motor cost.

Summary of the invention

Goal of the invention: the purpose of this utility model is to solve the problems referred to above that prior art exists, and a kind of flame-proof type threephase asynchronous is provided, and the cost that it can reduce motor makes the simple operation easily of assembling.

Technical scheme: in order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:

A kind of flame-proof type threephase asynchronous, it comprises casing, be provided with stator and rotor in the casing, the two ends of casing are connected with front end housing and rear end cap, the two ends of rotor are drawn by front end housing, rear end cap respectively, the fan braked wheel is housed stretching out on the rotor of rear end cap, on rear end cap, is connected with adaptive with it integral type end shield.

Beneficial effect: end shield of the present utility model is integrated existing rear head and two parts of stifle, has reduced by a part, and motor needs the position of flame proof to reduce, and the anti-explosion safety performance is improved; And the operation of motor production assembling reduces, the motor total weight alleviates, reduced former material and manufacturing cost, has improved economic benefit.

Description of drawings

Fig. 1 is the structural representation of existing flame-proof type threephase asynchronous.

Fig. 2 is a structural representation of the present utility model

Embodiment:

Below in conjunction with accompanying drawing the utility model is done further explanation.

As shown in Figure 2, flame-proof type threephase asynchronous of the present utility model comprises casing 2, two ends at casing are connected with protecgulum 1 and rear end cap 4 by trip bolt, casing 2 inwalls are fixed with taper stator 3, cone rotor 7 is equipped with at the center of taper stator 3, the two ends branch of described cone rotor 7 is drawn by front end housing 1 and rear end cap 4, and respectively by bearing fixing on front end housing 1 and rear end cap 4, cone rotor 7 is equipped with compression spring 8 near front end housing 1 place, the affixed fan braked wheel 5 in the outside of rear end cap 4 is connected with adaptive with it integral type end shield 6 on rear end cap 4.The existing structure that end shield and stifle are separated of comparing, the utility model is made as integral type with end shield and stifle, has reduced assembly process, has reduced the weight of motor, has reduced production cost.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (1)

1. flame-proof type threephase asynchronous, it comprises casing (2), be provided with stator (3) and rotor (7) in the casing (2), the two ends of casing (2) are connected with front end housing (1) and rear end cap (4), the two ends of rotor (7) are drawn by front end housing (1), rear end cap (4) respectively, fan braked wheel (5) is housed on the rotor that stretches out rear end cap (4) (7), it is characterized in that: on rear end cap (4), be connected with adaptive with it integral type end shield (6).

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