Shielding structure for shielding stator core of motor and stator closed slot threading technology
A technology of stator iron core and shielded motor, which is applied in the direction of structural connection, manufacture of motor generators, magnetic circuit shape/style/structure, etc., can solve the problems of plastic deformation strength, damage of shielding sleeve, weak support, etc. The effect of friction loss, life extension and loss reduction
Inactive Publication Date: 2013-12-11
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
The stator slot of the stator core in the traditional motor is provided with an opening to the side of the shielding sleeve for inlaying copper bars or windings. After the wall shielding sleeve is subjected to high reactor coolant fluid pressure, the shielding sleeve is located at the notch position due to weak support, which is prone to plastic deformation or strength damage, resulting in damage to the shielding sleeve
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[0020] Such as figure 1 , figure 2 and image 3 As shown, the shielding structure of the stator core in the shielded motor includes a stator core 1 and a shielding sleeve 2, wherein the stator core 1 is composed of a plurality of circular silicon steel sheets laminated, and the whole forms a circular columnar structure. The shielding sleeve 2 is made of stainless steel, the shielding sleeve 2 passes through the through hole in the center of the inner ring of the stator core 1, and the two ends of the shielding sleeve 2 are sealed and welded to the two ends of the stator core 1 respectively. The size of the through hole in the center of the shielding sleeve 2 and the inner ring of the stator core 1 matches, that is, a small uniform gap should be maintained between the shielding sleeve 2 and the inner ring of the stator core 1, so that the shielding sleeve 2 can be pressed by the stator core. 1 support.
[0021] The stator core 1 is provided with a plurality of evenly distri...
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The invention discloses a shielding structure for shielding a stator core of a motor. The shielding structure comprises a shielding cover (2) and the annular cylindrical stator core (1). The shielding cover (2) penetrates through a through hole in the center of an inner ring of the stator core (1). The two ends of the shielding cover (2) are connected with the two ends of the stator core (1) respectively. The stator core (1) is provided with a plurality of longitudinal through holes (4) for containing winding coils, and a closed notch structure is formed on a cross section through the longitudinal through holes (4). The invention further discloses a stator closed slot threading technology of the shielding structure for shielding the stator core of the motor According to the shielding structure, the whole shielding structure is simple and easy to achieve. When the shielding structure is applied, the stator core (1) can support the shielding cover (2) evenly, the occurrence that the shielding cover (2) is deformed or damaged due to the fact that the shielding cover (2) is supported unevenly can be avoided, and the service life of the shielding cover (2) is prolonged.
Description
technical field [0001] The invention relates to a motor, in particular to a shielding structure of a stator iron core in a shielded motor and a stator closed slot threading process. Background technique [0002] The shielded pump with high temperature and high pressure fully sealed structure of the nuclear energy device adopts a structure in which the drive motor and the impeller are integrated in its pressure-bearing shell. In order to prevent the stator core and winding coil of the motor from contacting with the reactor coolant fluid and cause the motor to fail, a corrosion-resistant thin-walled shielding sleeve is put into the circular cylindrical stator core, and at both ends of the stator core The design of sealing welding is carried out to achieve the purpose of sealing and isolation. Since the cylindrical thin-walled shielding sleeve needs to rely on the support of the stator core to withstand the high pressure of the reactor coolant fluid, the shape and structure of...
Claims
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IPC IPC(8): H02K1/16H02K11/00H02K15/085H02K11/20
Inventor 邓礼平蒋小毛黄伟
Owner NUCLEAR POWER INSTITUTE OF CHINA