A process method for preventing end pieces from escaping the stator core of a large motor

Abstract

The invention discloses a process method for preventing end pieces from escaping the stator iron core of a large motor, which is an innovation in the bonding process method of the end pieces of the stator iron core of a large motor, and breaks the conventional bonding between the end pieces with a silicon steel sheet insulating paint film. way, using the paint-free bonding technology between the end pieces. The invention adopts the surface drawing process of the end piece to effectively remove the burr, and increases the adhesion of the adhesive on the surface of the end piece. The air-drying treatment and vacuum anastomosis bonding technology is adopted for the end pieces after gluing, which avoids the phenomenon of bulging bubbles in the internal shape after the end pieces are bonded, and increases the adsorption force between the end pieces. The invention adds insulating positioning pins and rib plugs to the end piece, thereby enhancing the integrity of the end piece. The invention adopts the magnetization heating test of the stator core to effectively detect the heating phenomenon inside the end piece, and solves the problem that people cannot check the quality of the internal bonding of the end piece. The present invention is a new technical solution with strong practicability and easy promotion.

Description

Technical field:

[0001] The invention relates to the field of motors, in particular to a process method for preventing end pieces from escaping for a stator core of a large motor. Background technique:

[0002] After the large motor is put into operation, the temperature of the stator core is generally around 70°C, and the temperature difference with the surrounding environment is large. After frequent starting and stopping and long-term operation, the stator is too much in a state of thermal expansion and contraction. , Due to the influence of the large temperature difference between the stator punch and the stator base, the two cannot synchronously expand and contract, and the internal stress of the stator is unevenly distributed, resulting in a huge interaction force. Under the condition of long-term operation and vibration, the bonding effect of the stator core end pieces is not good, and the phenomenon of loosening occurs, so that the dovetail groove of the end piece is...

Examples

Embodiment Construction

[0032] The invention relates to a process method for preventing end pieces from escaping from the stator iron core of a large motor. The technical solution includes the following steps:

[0033] 1) The stator core end piece is added with auxiliary fixing hole and slot and the size of the slot is enlarged: such as figure 1 The shown stator core end piece punching piece is made of 0.5 mm thick non-oriented silicon steel sheet as the manufacturing material, and two insulating pin positioning holes 2 with a diameter of 12 mm are punched on the yoke 1 of the opposite end piece on the punching machine. A vertical rib plug groove 4 with a width of 5 mm and a depth of 100 mm is punched on each tooth part 3. After the end pieces are bonded into a whole, the size of the groove 5 becomes smaller due to the influence of the adhesive film. When processing the size of the groove 5, it is necessary to On the basis of the original groove size, the depth of the groove is increased by 0.3 mm a...

Technical field:

[0001] The invention relates to the field of motors, in particular to a process method for preventing end pieces from escaping for a stator core of a large motor. Background technique:

[0002] After the large motor is put into operation, the temperature of the stator core is generally around 70°C, and the temperature difference with the surrounding environment is large. After frequent starting and stopping and long-term operation, the stator is too much in a state of thermal expansion and contraction. , Due to the influence of the large temperature difference between the stator punch and the stator base, the two cannot synchronously expand and contract, and the internal stress of the stator is unevenly distributed, resulting in a huge interaction force. Under the condition of long-term operation and vibration, the bonding effect of the stator core end pieces is not good, and the phenomenon of loosening occurs, so that the dovetail groove of the end piece is...

Examples

Embodiment Construction

[0032] The invention relates to a process method for preventing end pieces from escaping from the stator iron core of a large motor. The technical solution includes the following steps:

[0033] 1) The stator core end piece is added with auxiliary fixing hole and slot and the size of the slot is enlarged: such as figure 1 The shown stator core end piece punching piece is made of 0.5 mm thick non-oriented silicon steel sheet as the manufacturing material, and two insulating pin positioning holes 2 with a diameter of 12 mm are punched on the yoke 1 of the opposite end piece on the punching machine. A vertical rib plug groove 4 with a width of 5 mm and a depth of 100 mm is punched on each tooth part 3. After the end pieces are bonded into a whole, the size of the groove 5 becomes smaller due to the influence of the adhesive film. When processing the size of the groove 5, it is necessary to On the basis of the original groove size, the depth of the groove is increased by 0.3 mm a...

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