A vacuum varnishing device for stator core with windings of large and medium-sized motors

Abstract

The present invention belongs to the technical field of mechanical dipping tooling, and specifically relates to a vacuum dipping paint device for a large and medium-sized motor with a winding stator core. The vacuum dipping paint device for a large and medium-sized motor with a winding stator core of the present invention comprises a dipping paint tank, a dipping paint box is arranged in the dipping paint tank, a winding stator core and a paint delivery pipe are arranged in the dipping paint box, a stator liner is arranged in the inner hole of the winding stator core, and the winding stator core is positioned on the inclined surface of the bottom of the dipping paint box and the inclined surface of the triangular double pressing frame, arc positioning plates are arranged on both sides of the triangular double pressing frame, and the protruding parts at both ends of the stator liner are clamped on the arc positioning plates. The vacuum dipping paint device of the present invention can reduce the amount of insulating paint used in the entire workpiece during the vacuum dipping process and effectively shorten the effective time required for dipping, while ensuring safety and meeting the process quality requirements of the workpiece after vacuum dipping and convenient operation.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical varnish dipping tools, and in particular relates to a vacuum varnish dipping device for a stator core with windings of a large or medium-sized motor. Background Art

[0002] The winding stator cores of various types of existing large and medium-sized motors need to be vacuum-impregnated using the vacuum pressure impregnation process (VPI). The insulating varnish for vacuum-impregnating winding stator cores is relatively expensive (about tens to hundreds of yuan per kilogram, or even more expensive). In addition, the inner diameter of the corresponding large motor is relatively large, and the traditional main immersion tank is usually a typical cylindrical barrel. Therefore, a large amount of insulating varnish is used during vacuum dipping, and it takes a relatively long time to evacuate it, which is inefficient and costly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a vacuum varnishing device for a stator core with windings of a large and medium-sized motor in view of the deficiencies of the prior art. The vacuum varnishing device of the present invention can reduce the amount of insulating varnish used in the entire workpiece during the vacuum varnishing process and effectively shorten the effective time required for varnishing while ensuring safety and meeting the process quality requirements of the workpiece after vacuum varnishing and convenient operation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical scheme: a vacuum varnishing device for a winding stator core of a large and medium-sized motor comprises a varnishing tank, a varnishing box is arranged in the varnishing tank, a winding stator core and a paint delivery pipe are arranged in the varnishing box, a stator liner is arranged in the inner hole of the winding stator core, the winding stator core is positioned on the inclined surface of the bottom of the varnishing box and the inclined surface of the triangular double pressing frame, arc positioning plates are arranged on both sides of the triangular double pressing frame, and the protruding parts at both ends of the stator liner are clamped on the arc positioning plates.

[0005] The arc radius of the arc positioning plate is greater than the radius of the stator inner shell.

[0006] The arc positioning plate comprises an upper arc positioning plate and a lower arc positioning plate, wherein the arc opening of the upper arc positioning plate faces downwards, and the arc opening of the lower arc positioning plate faces upwards.

[0007] The stator inner shell is connected to the atmospheric pressure of the paint dipping tank through the first ventilation pipe and the second ventilation pipe.

[0008] The paint dipping box is installed in the paint dipping tank through a lifting lug, the lifting lug is connected to a connecting plate, and the connecting plate is fixed on a triangular double-jointed pressing frame.

[0009] One end of the paint delivery pipe is arranged at the bottom of the paint dipping box, and the other end passes through the paint dipping tank and is connected to the paint storage tank through a flange and a high-pressure metal hose. A stop valve is arranged between the flange and the high-pressure metal hose, and a flange sleeve is arranged on the flange.

[0010] The paint dipping tank is provided with an upper pressure cover and an arc bottom, the arc bottom is provided with a seat frame, a bottom bracket is provided on the seat frame, and the paint dipping box is placed on the bottom bracket.

[0011] The paint dipping box is made of reinforced equilateral angle steel and is shot peened as a whole.

[0012] The length of the stator inner shell is greater than the length of the stator core with windings.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The large and medium-sized motor winding stator core vacuum varnishing device of the present invention comprises a varnishing tank, a varnishing box is arranged in the varnishing tank, a winding stator core and a paint delivery pipe are arranged in the varnishing box, a stator liner is arranged in the winding stator core, a certain gap is provided between the winding stator core and the stator liner to facilitate the storage of a certain amount of insulating varnish, the winding stator core is positioned on the inclined surface of the triangular double pressing frame in the varnishing box, arc positioning plates are welded on both sides of the triangular double pressing frame, and the protruding parts at both ends of the stator liner are clamped on the arc positioning plates, so as to reduce the amount of insulating varnish used in the whole varnishing process, thereby reducing the varnishing cost of the workpiece!

[0015] The large and medium-sized motor winding stator core vacuum varnishing device of the present invention has a simpler overall structural design and is easier to manufacture; the installation and operation processes are also extremely convenient, and a number of corresponding ventilation pipes are designed to communicate with the varnishing tank, which has extremely high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The invention is a front view of a vacuum varnishing device for a stator core with windings for large and medium-sized motors.

[0017] Figure 2 It is a left side view of a vacuum varnishing device for a winding stator core of a large or medium-sized motor according to the present invention.

[0018] Figure 3 It is a top view of a vacuum varnishing device for a winding stator core of a large or medium-sized motor according to the present invention.

[0019] Figure 4 It is a structural schematic diagram of the arc positioning plate of the present invention.

[0020] Figure 5 yes Figure 1 Enlarged view of middle Ⅰ.

[0021] Figure 6yes Figure 2 Enlarged view of middle II.

[0022] Figure 7 yes Figure 2 Enlarged view of middle III.

[0023] Explanation of the reference numerals: 1- stator liner; 2- first ventilation pipe; 3- lifting ear; 4- second ventilation pipe; 5- upper pressure cover; 6- connecting plate; 7- varnish dipping tank; 8- flange sleeve; 9- flange; 10- stop valve; 11- high-pressure metal hose; 12- varnish dipping box; 13- stator core with winding; 14- paint delivery pipe; 15- bottom support; 16- seat frame; 17- bottom of the arc; 18- reinforced equilateral angle steel; 19- triangular double press frame; 20- cold stamped right angle bend; 21- small limiting angle steel; 22- upper arc positioning plate; 23- lower arc positioning plate. DETAILED DESCRIPTION

[0024] The large and medium-sized motor winding stator core vacuum varnishing device of the present invention comprises a varnishing tank, a varnishing box is arranged in the varnishing tank, a winding stator core and a paint delivery pipe are arranged in the varnishing box, a stator liner is arranged in the inner hole of the winding stator core, the main positioning of the winding stator core is on the inclined surfaces on both sides of the bottom of the varnishing box (relying on the dead weight of the stator), and arc positioning plates are arranged on both sides of the triangular double pressing frame above, and the protruding parts at both ends of the stator liner are clamped on the arc positioning plates. The vacuum varnishing device of the present invention can reduce the amount of insulating paint used in the entire workpiece during the vacuum varnishing process and effectively shorten the effective time required for varnishing, while ensuring safety and meeting the process quality requirements of the workpiece after vacuum varnishing and convenient operation.

[0025] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0026] Example 1

[0027] like Figure 1-3 As shown, a large and medium-sized motor has a winding stator core vacuum varnishing device, including a varnishing tank 7, a varnishing box 12 is arranged in the varnishing tank 7, a winding stator core 13 and a paint delivery pipe 14 are arranged in the varnishing box 12, a stator liner 1 is arranged in the inner hole of the winding stator core 13, the winding stator core 13 is positioned on the inclined surface of the bottom of the varnishing box 12 and the inclined surface of the triangular double pressing frame 19, arc positioning plates are arranged on both sides of the triangular double pressing frame 19, and the protruding parts at both ends of the stator liner 1 are clamped on the arc positioning plates.

[0028] The arc radius of the arc positioning plate is greater than the radius of the stator inner shell 1 .

[0029] The arc positioning plate comprises an upper arc positioning plate 22 and a lower arc positioning plate 23 . The arc opening of the upper arc positioning plate 22 faces downward, and the arc opening of the lower arc positioning plate 23 faces upward.

[0030] The stator liner 1 is connected to the atmospheric pressure of the paint dipping tank 7 through the first ventilation pipe 2 and the second ventilation pipe 4. During the vacuum paint dipping process, the air pressure of the liner is connected to the air pressure in the paint dipping tank, which can improve the safety of vacuuming. The first ventilation pipe 2 and the second ventilation pipe 4 are made of seamless steel pipes and are provided with cold stamped right-angle bends 20.

[0031] The varnish dipping box 12 is installed in the varnish dipping tank 7 through the lifting lug 3 , the lifting lug 3 is connected to the connecting plate 6 , and the connecting plate 6 is fixed on the triangular double-jointed pressing frame 19 .

[0032] One end of the paint delivery pipe 14 is arranged at the bottom of the paint dipping box 12, and the other end passes through the paint dipping tank 7 and is connected to the paint storage tank through the flange 9 and the high-pressure metal hose 11. A stop valve 10 is arranged between the flange 9 and the high-pressure metal hose 11, and a flange sleeve 8 is arranged on the flange 9.

[0033] The paint dipping tank 7 is provided with an upper pressure cover 5 and an arc bottom 17 . The arc bottom 17 is provided with a seat frame 16 . A bottom bracket 15 is provided on the seat frame 16 . The paint dipping box 12 is placed on the bottom bracket 15 .

[0034] The paint dipping box 12 is made of reinforced equilateral angle steel 18 and is shot peened as a whole.

[0035] The length of the stator inner shell 1 is greater than the length of the stator core 13 with windings.

[0036] Press the above parts Figure 1-3Assembly: Place the seat frame 16 on the upper plane of the arc bottom 17 of the paint immersion tank, then place the bottom bracket 15 on the seat frame 16, place the stator liner 1 on the inner cavity 13 of the stator core with winding (the vent pipe opening faces upward), and then place the stator core 13 with winding together with the stator liner 1 in the paint immersion box 12 until the stator core 13 with winding is positioned on the inclined surface at the bottom of the paint immersion box 12, the length of the stator liner 1 is greater than the length of the stator core 13 with winding, and the protruding parts at both ends are respectively stuck on the lower arc positioning plate 23 at the bottom of the paint immersion box 12 (the arc opening faces upward, and the arc radius on the lower arc positioning plate 23 is greater than the radius of the stator liner 1), so that it can ensure that the bottom of the stator core 13 with winding is aligned with the paint immersion box 1 2 A certain gap is left at the bottom to store the insulating paint, and then the triangular double pressing frame 19 is placed into the varnish dipping box 12 by a special lifting device through the action of the connecting plate 6. The triangular double pressing frame 19 is positioned by a small limiting angle steel 21 during assembly, and the two inclined surfaces on the inner side of the lower part touch the upper part of the stator core 13 with windings for positioning. Similarly, upper arc positioning plates 22 (the arc opening is downward, and the arc radius on the upper arc positioning plate 22 is greater than the radius of the stator liner 1 body) are welded on both sides of the triangular double pressing frame 19; in this way, it can be ensured that a certain gap is evenly left between the outer surface of the stator liner 1 body and the inner surface of the stator core 13 with windings to store the insulating paint, and the upward buoyancy generated by the insulating paint on the stator liner 1 body during the varnish dipping process can be controlled.

[0037] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A vacuum varnishing device for a winding stator core of a large or medium-sized motor, comprising a varnishing tank (7), characterized in that: The paint dipping tank (7) is provided with a paint dipping box (12), the paint dipping box (12) is provided with a winding stator core (13) and a paint delivery pipe (14), a stator liner (1) is provided in the inner hole of the winding stator core (13), the winding stator core (13) is positioned on the inclined surface of the bottom of the paint dipping box (12) and the inclined surface of the triangular double pressing frame (19), arc positioning plates are provided on both sides of the triangular double pressing frame (19), and the parts of the stator liner (1) extending from the winding stator core (13) at both ends are clamped on the arc positioning plates; The arc radius of the arc positioning plate is greater than the radius of the stator liner (1); The arc positioning plate comprises an upper arc positioning plate (22) and a lower arc positioning plate (23), wherein the arc opening of the upper arc positioning plate (22) faces downwards, and the arc opening of the lower arc positioning plate (23) faces upwards; The varnish dipping box (12) is installed in the varnish dipping tank (7) via a lifting lug (3), the lifting lug (3) is connected to a connecting plate (6), and the connecting plate (6) is fixed on a triangular double-jointed pressing frame (19); One end of the paint delivery pipe (14) is arranged at the bottom of the paint dipping box (12), and the other end passes through the paint dipping tank (7) and is connected to the paint storage tank through a flange (9) and a high-pressure metal hose (11); a stop valve (10) is arranged between the flange (9) and the high-pressure metal hose (11), and a flange sleeve (8) is arranged on the flange (9); The paint dipping tank (7) is provided with an upper pressure cover (5) and an arc bottom (17); the arc bottom (17) is provided with a seat frame (16); a bottom bracket (15) is provided on the seat frame (16); and the paint dipping box (12) is placed on the bottom bracket (15); The length of the stator inner shell (1) is greater than the length of the stator core (13) with windings.

2. The large and medium-sized motor winding stator core vacuum impregnation device according to claim 1 is characterized in that: The stator liner (1) is connected to the atmospheric pressure of the paint dipping tank (7) via the first ventilation pipe (2) and the second ventilation pipe (4).

3. The vacuum varnishing device for stator core of large and medium-sized motors according to claim 1 is characterized in that: The paint dipping box (12) is made of reinforced equilateral angle steel and is shot peened as a whole.

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