CN2162030Y

CN2162030Y - Explosion-proof DC motor with brake for lift

Info

Publication number: CN2162030Y
Application number: CN 93219723
Authority: CN
Inventors: 朱宏谱; 史群芳; 陈龙
Original assignee: SPECIAL LIFT FACTORY OF SHANGHAI HOUSES EQUIPMENT ENGINEERING Co
Current assignee: SPECIAL LIFT FACTORY OF SHANGHAI HOUSES EQUIPMENT ENGINEERING Co
Priority date: 1993-07-22
Filing date: 1993-07-22
Publication date: 1994-04-13
Anticipated expiration: 2003-07-22

Abstract

The utility model discloses an explosion-proof direct current brake motor for a lift, comprising a housing, a front and a back end covers, a stator, a rotor, a bearing cover and a motor outlet box. The utility model is characterized in that the outlet box of the motor is provided with an explosion-proof structure, mutual connecting surfaces are all accorded with explosion-proof requirements, the utility model is also provided with an inner brake and an automatic compensation mechanism. The motor with the structure has the advantages of small volume, compact structure, good starting and braking performances, and safety. The explosion-proof effects can also be obtained. Accordingly, the utility model is applicable for the traction engines of lifts in occasions with explosive mixtures, such as chemical plants, oil refineries, gas plants, etc.

Description

Explosion-proof DC motor with brake for lift

This novel a kind of elevator traction motor, particularly a kind of elevator traction motor that is applicable to the hazardous area that has explosive mixture of relating to.

Employed motor all adopts open type and structure that all have brake outside the tile fragment formula on the elevator traction machine at present, thereby not only big, the poor performance of volume, structure fall behind, and are not suitable for the place that for example chemical plant, oil plant and gasworks etc. have damp.

This novel purpose provides little, the compact conformation of a kind of volume, and the threephase asynchronous of the flame-proof type DC injection braking that operate steadily, speed change is soft, braking is mild and safe and reliable makes it can be used for II class 1 district and contains on the explosion-proof lift in the factory of explosion risk gas, place.

A kind of flame-proof type DC injection braking motor of the present utility model includes: a casing, the front and rear cover that matches and be provided with described casing, the bearing end cover that is connected with described front and rear cover, one is arranged on the stator in the described casing, one rotor that matches with described stator is arranged on the motor outlet box on the described casing; Be characterized in that described front and rear cover is the connection of flame proof with being connected of casing; Be provided with the structure of flame proof in the described motor outlet box, described motor also includes: the front and back bearings inner cap respectively constitutes a flame proof bearing chamber respectively with described bearing end cover, front and rear cover spiral shell knot; One anti-explosion cover is provided with and flame proof ground spiral shell is tied on described rear end cap; One inner brake, be arranged in the described anti-explosion cover, it includes: an electromagnet device, with a disk brake device, described disk brake device includes: a fixed disk, one and described fixed disk rotating disk and some brake block of adjacent setting Face to face, described each brake block is embedded on the described rotating disk, and described rotating disk is arranged on the rear axle of rotor and can rotates with rotor; One compensation mechanism is connected on the described electromagnetic core, thereby guarantees constant braking moment in order to the wearing and tearing that automatically compensate brake block with the gap of keeping described brake block and armature; One adjusting mechanism includes: one adjusts cover and adjusts spring, and described adjustment cover spiral shell is tied in the central screw of described braking bonnet, and described adjustment spring is placed in described adjustment cover and armature residual gap in order to set up required braking moment; One handle mechanism fixedlys connected with electromagnetic core, so that produce the gap between armature and described brake block when the pulling handle, so that rotor is rotatable; One cover cap is equipped on the rear end face of brake anti-explosion cover flame proof; One brake outlet box is arranged on the described anti-explosion cover flame proof; Described armature, electromagnetic core and fixing brake disc are installed screw rods by 4 and are run through and be connected, and described armature and electromagnetic core are axially slided thereon, and the one end is fixed in the rear end cap of motor, and the other end is connected on the braking bonnet.

Adopt the scheme of explosion-proof type inside brake structure of the present utility model, its advantage is clearly, and it is compared with motor with original elevator has following advantage at least: operate steadily, speed change is soft; Little, the good looking appearance of volume; Owing to have the inner brake and the compensation mechanism of explosion-proof type, not only make its explosion-proof performance be better than tile fragment formula external contractring brake, and compact conformation, to play braking mild; More because motor adopts full flame-proof type structure, can make it to be used for safely and reliably the elevator traction machine that workplace that for example chemical industry, oil plant, gasworks etc. have damp or steam is used.

Above-mentioned and other advantage of the present utility model will be seen more clearly in following embodiment.

Now by a most preferred embodiment of the present utility model and in conjunction with its accompanying drawing so that characteristics of the present utility model and purpose to be described further.

Fig. 1 is that the vertical profile of an embodiment of the present utility model is looked schematic diagram;

Fig. 2 is that schematic diagram is looked on the left side of Fig. 1 embodiment;

Fig. 3 is the sectional elevation that has the motor outlet box of explosion separation structure of the present utility model;

Figure 1 shows that the embodiment of elevator of the present utility model with flame-proof type DC injection braking motor.As shown in the figure, present embodiment includes: electric machine casing 43; Be embedded the stator 13 in described housing 43; Front and

rear cover

3,16, they have annular end face and axial cylindrical face respectively, and respectively with the end face and the inner cylinder surface engagement of housing, wear by bolt and to be fixed on the housing 43, gap between described mating surface and effective cooperation area meet flame proof and require (hereinafter described what is called " flame proof " all is meant heat of high temperature that is enough to the gas burst of setting off an explosion property that is present in motor internal or the isolated structure of Mars sealing, is meant all that generally gap, relevant composition surface and effective contact area or length meet the flame proof requirement); Front and back bearings 4 is arranged in described front and

rear cover

3,16 endoporus; One rotor 12 is arranged in the endoporus of bearing 4 by the two ends axle journal of its rotating shaft 1; Front and back bearings lid 2 and inside cap 7, annular stopper face by separately is connected in described front and

rear cover

3,16 to form the front and back bearings chamber by some bolts respectively, described inner bearing chamber 7 endoporus cooperate with one section axle journal 44 of rotor, described front and back bearings is covered 2 endoporus and is respectively equipped with sealing ring 55, and above-mentioned seam mating surface, axle journal cooperate the gap of cylinder all to meet the front and back bearings chamber that flame proof requires just to have constituted thus the curved path ring protection structure with flame-proof type; One its explosion separation structure of motor outlet box 8(with explosion separation structure will describe in detail below), settle on the casing 43; One explosion-proof case 18, flame proof ground spiral shell is tied on described rear end cap 16; One inner brake 46, include shell and be arranged on electromagnet device and disk brake device in the described flame proof case 18, wherein: described electromagnet device includes armature 32 and electromagnetic core 19, is provided with direct current winding (not shown) in electromagnetic core 19; Described disk brake device comprise one fixedly brake disc 39, with described fixedly brake disc 39 rotating disk 33 and some brake block 38 of adjacent setting Face to face, on rotating disk 33, be provided with some (for example 10) uniform mounting hole, described brake block 38 is pressed into corresponding waist shape shape by Cu-base powder and is embedded in the described mounting hole, contact with fixed disk 39 respectively, rotating disk 33 is provided with the spline axis hole, equipped mutually with the spline of shaft behind the motor 56, can rotate with motor; One compensation mechanism 20 is connected with electromagnet 19, can automatically follow the tracks of compensation when brake block 38 wearing and tearing, thereby so that the distance C between electromagnet 19 and the armature 32 remain and constantly guarantee that braking moment is constant; One adjusting mechanism, it includes spiral shell and ties in one of braking bonnet 42 and adjust cover 30 and be arranged on the adjustment spring 31 of adjusting 32 in cover 30 and armature, is used to set up required braking moment; One handle mechanism 28 fixedlys connected with electromagnetic core 19, and (not shown) so that produce the gap between armature 32 and brake block 38 when the pulling handle, a cover cap 25 is arranged on the rear end face of explosion-proof case 18 flame proof; One brake outlet box 17 is arranged on the described explosion-proof case 8 flame proof.

This shows, motor of the present utility model, the composition surface of each heat of high temperature of may overflowing (or the Mars of scurrying out) all is to meet the mating surface that flame proof requires, they by fit clearance and effectively contact area (or length) obtain strict control, these Control Parameter are through actual tests and definite.

These parts of above-mentioned inner brake are except that rotating disk 33, be described armature 32, electromagnet 19, fixedly brake disc 39 is all installed screw rods 29 by 4 and is run through connection, and these 4 construction bolts 29 also play the guide rod effect, armature, electromagnetic core can be endwisely slipped thereon, the one end is fixed in back end cover for motor 16, the other end is connected on the braking bonnet 42, and these install screw rods 29 is to be positioned on the position at four angles of these parts (not shown) in the described position of being run through other part.

The explosion separation structure of described motor outlet box 8 such as Fig. 3.Shown in the motor outlet box in cable access connector 50, be provided with sealing rubber pad 49 and pad 48, thereby by bolt 47 with two cable access connectors, 50 spiral shells knots to compress flexibly clamping outlet cable (not shown) of sealing rubber pad 49, to reach the flame proof effect; Outside each binding post 52, all be arranged with insulating case 53, styletable at binding post is provided with arc packing ring 54, each part connecting portion and have all as the aforementioned with the joint face of cable access connector 50 that flame proof requires (fit clearance of regulation and effective contact-making surface are arranged and be connected by bolt) in addition of outlet box component 51.

Threephase asynchronous of the present utility model is a double-speed motor, and promptly its number of electrodes is 6/24P.

The course of work of above-mentioned inner brake 46 is such: when motor and inner brake 46 are switched on simultaneously (in fact electrical power slightly lags behind brake), the electromagnet 19 of brake 46 just holds armature 32, make rotating disk 33 and fixedly produce the gap between brake disc 39, the armature 32, thereby rotating disk 33 is rotated with machine shaft 1, thereby make motor start-up; (otherwise outage back), brake 46 is just braked.

If need need only open cover cap 25 when machine shaft 1 is rotated, pulling handle 28 can make armature 32, brake block 38 and fixedly produce the gap between the brake disc 39, so just turns rotating shaft 1 under situation about having a power failure.This situation is to occur in when having a power failure suddenly in the running process of elevator, elevator cage is stopped between the two-layer entrance hall, can shake the handwheel that is associated in motor shaft 1 by said method, can make the cab rising or drop to floor in front of the door, thereby make people or goods safe escape elevator in the cab.

The characteristic that the motor of this structure can obtain to operate steadily, speed change is soft; Owing to adopted full flame-proof type structure, made it to enlarge to use and contain explosion risk gas place; Owing to adopted inner brake and automatic compensation structure, not only make little, the compact conformation of motor volume, and make it can adapt to the requirement that repeats to work in short-term and rise continually, brake, can in the operating period, keep constant braking moment; The motor of this structure can also adapt to voltage fluctuation, has enough starting speed, and starting current is little, this shows that flame-proof type DC injection braking motor of the present utility model is applicable on the elevator traction machine of the hazardous area that has explosive mist fully.

Should be understood that, though design feature of the present utility model is illustrated by a specific embodiment, but under the situation of its basic principle and characteristics, those skilled in the art that also can make various modifications or replacement scheme for the concrete structure of its relevant parts, and these modifications or replacement scheme all are included in the scope of the present utility model.

Claims

1, the flame-proof type DC injection braking motor used of a kind of elevator, include: a casing, the front and rear cover that matches and be provided with described casing, the bearing end cover that is connected with described front and rear cover, one is arranged on the stator in the described casing, one rotor that matches with described stator is arranged on the motor outlet box on the described casing; It is characterized in that, described front and rear cover is the connection of flame proof with being connected of casing, be provided with the structure of flame proof in the described motor outlet box, described motor also includes: the front and back bearings inner cap respectively constitutes a flame proof bearing chamber respectively with described bearing end cover and front and rear cover spiral shell knot; One anti-explosion cover, flame proof ground spiral shell is tied on described end cap; One inner brake, be arranged in the described explosion-proof case, it comprises: an electromagnet device and a disk brake device, described disk brake device includes: a fixed disk, one with described fixed disk rotating disk and some brake block of adjacent setting Face to face, described each brake block is embedded on the described rotating disk, and described rotating disk is arranged on the rotor rear axle and can rotates with rotor; One compensation mechanism is connected on the electromagnet, thereby guarantees constant braking moment in order to the wearing and tearing that automatically compensate brake block with the gap of keeping this brake block and armature residual gap; One adjusting mechanism comprises: one adjusts cover and adjusts spring, and described adjustment cover spiral shell is tied in the central screw of described braking bonnet, and described adjustment spring is placed between described adjustment cover and the armature, in order to set up required braking moment; One handle mechanism fixedlys connected with electromagnetic core, produces the gap so that rotor is rotatable between armature and brake block so that spur when shaking hands; One cover cap is equipped on the rear end face of the explosion-proof case of brake flame proof; One brake outlet box is arranged on the described explosion-proof case flame proof; Described armature, electromagnet and fixing brake disc are installed screw rods by 4 and are run through and be connected, and armature and electromagnet are axially slided thereon, and the one end is fixed in back end cover for motor, and the other end is connected on the braking bonnet.

2, the flame-proof type DC injection braking motor used of a kind of elevator as claimed in claim 1, it is characterized in that, described flame proof bearing chamber, include the cylinder faying face that is matched with rotor journal by annular stopper composition surface between bearing end cover, front and rear cover and internal bearing cover and internal bearing cover, the gap of described each faying face and effective contact length meet the flame proof requirement.

3, a kind of elevator as claimed in claim 1 flame-proof type DC injection braking motor, it is characterized in that, the explosion separation structure of described motor outlet box includes: be located at the interior sealing rubber pad of cable access connector and the pad of the described rubber blanket of clamping, be set in insulating case and the arc packing ring and the clamp nut that are located at the binding post end on the binding post.

4, a kind of elevator as claimed in claim 1 is characterized in that with flame-proof type DC injection braking motor the composition surface of explosion-proof case of described brake and rear end cap is the annular stopper face, and its fit clearance meets the requirement of flame proof.

5, a kind of elevator as claimed in claim 1 flame-proof type DC injection braking motor, it is characterized in that, the composition surface of described front and rear cover and casing is respectively end ring surface and axial cylinder, and the gap on described composition surface or effective contact length all meet the flame proof requirement.

6, the flame-proof type DC injection braking motor used of a kind of elevator as claimed in claim 1 is characterized in that described rotating disk is provided with several mounting hole grooves, and described brake block is provided in the described mounting hole groove and can contacts with described fixedly brake disc.

7, the flame-proof type DC injection braking motor of using as claim 1 or 6 described a kind of elevators is characterized in that described brake block is made by Cu-base powder.