Supporting structure for large protective cover of horizontal motor

Abstract

The utility model relates to a supporting structure for a large-scale protective cover of a horizontal motor, which comprises channel steel, angle steel and fasteners, the angle steel is vertically arranged at two ends of the channel steel respectively to form an I-shaped structure, and the channel steel and the angle steel are fastened through the fasteners respectively; four wind shield ring mounting holes are formed in the position, close to the bottom of the protective cover, of the door-shaped design of the protective cover, the supporting structure is arranged at the bottom of the protective cover, and the two ends of the two steel angles are fastened to the four corresponding wind shield ring mounting holes through fasteners respectively. The protective cover for the horizontal motor solves the problem that a peripheral thin-wall structure of the protective cover for the horizontal motor is easy to deform towards the inside of the protective cover due to the door-shaped design, all parts of the supporting structure are combined through bolts, nuts and washers, and deformation in the axial direction of a motor shaft cannot be generated in the hoisting and transporting process; and the protective cover can also smoothly adopt a thin-wall part structure, and meanwhile, the manufacturing material cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of mechanical manufacturing, and particularly relates to a support structure for a protective cover of a horizontal motor. Background Art

[0002] For the sustainable development of enterprises, product optimization has always been the focus of the technical department. For motor products, improving motor efficiency, enhancing motor performance, reducing motor volume, and decreasing motor weight are the goals pursued by our technicians. Among them, improving the insulation performance of the motor and using less-varnish insulation paint can effectively shorten the core length and reduce the motor size. The installation method of a rolling mill is usually IM7315, that is, a horizontal motor with a raised base plate and a flange shaft lift. Since the less-varnish insulation system is more expensive than the medium-varnish insulation system, in order to reduce the amount of varnish dipping and facilitate cleaning after varnish dipping, the upper part of the base angle plate of the machine base is designed as a fully open structure without any outer cover plate. After the motor winding and insulation varnish dipping are completed, a large protective cover is used to cover the entire machine base (the main body of a conventional motor consists of parts such as a stator, a rotor, a base frame, and bearings, and the stator mainly includes: a machine base, a stator core, a stator coil. The stator core and the stator coil are both fixed in the machine base. The machine base of the large-cover structure motor introduced this time is open, as Figure 4 shown. There is no cover plate around the machine base, and the iron core and the coil are exposed. Therefore, in order to meet the protection level requirements, we use a whole cover to cover the main body part of the entire motor except for the bearings and part of the rotating shaft), and we call this kind of machine base an open type, and a motor with a structure that uses a whole large cover to cover the main body part of the entire motor except for the bearings and part of the rotating shaft is called a large-cover structure motor. The overall assembly drawing of the large-cover structure motor is as Figure 1 、 2 shown ([[]] Figure 1 is a cross-sectional view looking at the motor along the main shaft direction from the side, Figure 2 is the overall assembly drawing looking at the motor from the end face), the machine base is as Figure 3 、 4 shown, and the protective cover is as Figure 5 、 6 shown; the motor shaft is placed horizontally, and the end faces of the protective cover opposite to and opposite to the output direction of the motor shaft are respectively called the front end and the rear end of the protective cover; the axial direction of the motor shaft is as Figure 7 shown by the single dotted line inside, and for the convenience of description, it is also called the axial direction of the protective cover.

[0003] At present, a series of problems have also occurred during the overall assembly of motors with a large cover structure. Since the protective cover installed on the periphery of the machine base only serves a protective function and does not affect the rigidity of the motor, the protective cover adopts a thin-wall structure, usually welded by 6-mm steel plates to reduce material costs. However, due to the excessively large size of the rolling mill, the protective cover adopts a split structure on the left and right. In addition, the bottom 3 of the protective cover needs to pass through the motor shaft. In order to reduce the axial installation space of the protective cover and shorten the shafting, the shaft-passing parts at the front and rear ends of the protective cover are both designed as portal structures (as Figure 6 shown); this will cause the bottom 3 of the protective cover not to form an integral frame, and the large steel plate welded thin-wall structure itself is prone to deformation. Especially during hoisting and transportation, the portal design at the front and rear ends of the protective cover makes the thin-wall protective cover extremely prone to structural deformation with the front and rear ends respectively moving towards the inside of the protective cover, thereby triggering installation problems of some related components, such as the fit between the wind deflector ring installed on the protective cover and the motor shaft, the installation of the inner and lower end covers and the upper cover plate of the chassis inside the protective cover, and the installation problem of the main brush holder axially fixed at the end of the protective cover. Once the protective cover is deformed, these related components cannot be smoothly assembled according to the theoretical dimensions. The deformation direction of the protective cover is as shown by the arrow directions in Figure 7 . Summary of the Invention

[0004] Aiming at the problem that the thin-wall structure around the portal design of the protective cover for a horizontal motor is prone to deformation towards the inside of the protective cover, a support structure for a large protective cover of a horizontal motor is proposed. Specifically, it is an I-shaped support structure that is convenient and detachable for adapting to such a protective cover with an open bottom structure and its mating installation method with the protective cover that can eliminate the axial deformation of the protective cover.

[0005] The technical solution of the present utility model is as follows:

[0006] A support structure for a large protective cover of a horizontal motor includes channel steel, angle steel, and fasteners. Angle steels are vertically arranged at both ends of the channel steel respectively to form an "I" shape structure. The channel steel and the angle steels are fastened respectively through fasteners. The end of the protective cover adopts a portal design. There are a total of 4 wind deflector ring mounting holes at positions close to the bottom of the portal design of the protective cover. The support structure is arranged at the bottom of the protective cover. Both ends of the 2 angle steels are fastened to the corresponding 4 wind deflector ring mounting holes through fasteners.

[0007] The beneficial effects of the present utility model are as follows:

[0008] The various components of the support structure are joined together by bolts, nuts, and washers instead of being welded to the protective cover body, and can be installed or disassembled using simple installation tools.

[0009] During the hoisting and transportation process, due to the "I"-shaped support structure at the bottom of the protective cover, it becomes an integral framework and will not deform in the axial direction along the motor shaft. Since the mating surface between the angle steel and the protective cover is about 10 mm larger than the actual distance of the end face of the protective cover, and the bolts are installed from the inside of the cover outwards, when the nuts are tightened, the end of the cover will be pulled outwards. Therefore, the deformation of the bottom of the protective cover that is prone to inward buckling can be eliminated. As a result, the matching degree of related components will no longer be affected by the deformation of the protective cover, the assembly will become smooth, the protective cover can successfully adopt a thin-walled structure, and at the same time, the manufacturing material cost can be reduced. Description of the Drawings

[0010] Figure 1 It is the front view of the overall assembly of the motor with a large cover structure;

[0011] Figure 2 It is the side view of the overall assembly of the motor with a large cover structure;

[0012] Figure 3 It is the front view of the frame structure;

[0013] Figure 4 It is the side view of the frame structure;

[0014] Figure 5 It is the side view of the protective cover structure;

[0015] Figure 6 It is the front view of the protective cover structure;

[0016] Figure 7 It is the schematic diagram of the deformation direction of the bottom of the protective cover;

[0017] Figure 8 It is the front view of the assembly relationship between the support structure of the present invention and the bottom of the protective cover;

[0018] Figure 9 It is the top view of the assembly relationship between the support structure of the present invention and the bottom of the protective cover;

[0019] Figure 10 It is the top view of the support structure of the present invention;

[0020] Figure 11 For Figure 9 The enlarged view at A in

[0021] Reference Signs in the Drawings:

[0022] 1. Protective cover; 2. End of the protective cover; 3. Bottom of the protective cover; 4. Axis; 5. Channel steel; 6. Angle steel; 7. Joint surface of the protective cover; 8. Fastener; 9. Windshield mounting hole. Detailed Description of the Invention

[0023] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0024] The assembled form of the support structure is as Figure 10 shown. The support structure includes channel steel 5, angle steel 6, and fasteners 8. Angle steels 6 are vertically arranged at both ends of the channel steel 5 respectively to form a "worker" - shaped structure, and the channel steel 5 and the angle steels 6 are fastened by fasteners 8 respectively; the end of the protective cover adopts a portal design. There are a total of 4 wind - blocking ring mounting holes 9 near the position of the bottom 3 of the protective cover in the portal design of the protective cover. The support structure is arranged at the bottom 3 of the protective cover. The two ends of the 2 angle steels 6 are respectively fastened to the corresponding 4 wind - blocking ring mounting holes 9 by fasteners 8. After fastening, the distance between the two angle steels 6 is determined.

[0025] Among them, the end face of the protective cover is a part of the protective cover 1, and the end 2 of the protective cover is the plate with a portal design, and the wind - blocking ring mounting holes 9 are provided on the end 2 of the protective cover.

[0026] When the welding of the protective cover is completed and it is ready for lifting and transportation, first fasten the channel steel 5 and the angle steels 6 at both ends into a whole through 4 groups of fasteners 8 to form a "worker" - shaped support structure. During design, the distance between the mounting holes of the channel steel 5 and the angle steel 6 along the axis 4 direction is appropriately enlarged, so that there is a distance of 10 mm between the angle steel 6 and the end 2 of the protective cover before the fasteners 8 are fastened. Then place the support structure in place at the bottom 3 of the protective cover. Through the fasteners 8, use the 4 wind - blocking ring mounting holes 9 in the portal design of the protective cover to respectively fasten the two ends of the two angle steels 6 to the protective cover 1. The fasteners 8 are composed of bolts, nuts, and washers. Among them, the bolts are installed axially from the inside of the protective cover to the outside. When the nuts are tightened, the end 2 of the protective cover will be pulled outwards along the axial direction, as Figure 11 shown. The principle is as follows: After the relative positions of the angle steel 6 and the channel steel 5 are determined, there is a 10 - mm gap between the angle steel 6 and the end 2 of the protective cover. At this time, the nuts in the fasteners 8 have not been tightened. Then by tightening the nuts, the bolt head will drive the end of the protective cover to pull outwards in the direction outside the protective cover, so as to eliminate the deformation of the bottom 3 of the protective cover towards the inside.

[0027] The angle steel and the channel steel therein can be replaced with other profiles with appropriate structural strength.

[0028] The above-described embodiments merely represent one implementation manner of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A support structure for a large protective cover of a horizontal motor, characterized in that: It includes channel steel, angle steel and fasteners. Angle steels are vertically arranged at both ends of the channel steel to form an "I" structure. The channel steel and the angle steel are fastened by fasteners respectively. The end of the protective cover adopts a door-shaped design. The door-shaped design of the protective cover is provided with a total of 4 wind shield ring mounting holes near the bottom of the protective cover. The supporting structure is arranged at the bottom of the protective cover, and the two ends of the two angle steels are fastened to the corresponding 4 wind shield ring mounting holes by fasteners.

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