Sealing device and condensing unit of evaporative cooling asynchronous motor stator as well as manufacturing methods thereof

Abstract

The invention discloses a sealing device and a condensing unit of an evaporative cooling asynchronous motor stator and manufacturing methods thereof. The stator comprises a stator core and a stator winding which are mutual connected. The sealing device comprises a sleeve, two cavity side walls and two cavity connecting walls, wherein the sleeve is connected to an inner circle surface of the stator core; the outer edges of each cavity side wall are connected to an enclosure of an asynchronous motor in a seal mode; the outer ends of each cavity connecting wall are connected to the cavity side walls, and the inner ends of each cavity connecting wall are connected with the stator core along with the bending shape of an end part of the stator winding; and the sleeve, the two cavity side walls, the two cavity connecting walls and the enclosure form a stator seal cavity. In the invention, the unnecessary end part space is eliminated, so that the volume of the stator seal cavity is reduced, thus cooling medium liquids in the stator seal cavity are distributed reasonably, and the usage amount of the cooling medium is reduced therewith, thereby remarkably reducing the manufacturing cost of an evaporative cooling asynchronous motor, and improving the market competitiveness.

Description

Technical field [0001] The invention relates to a sealing device, a condensing device and a manufacturing method for the stator of an evaporative cooling asynchronous motor. Background technique [0002] High-voltage, high-power (explosion-proof) asynchronous motor is a large-scale asynchronous motor commonly used in industrial production. It also uses the law of electromagnetic force to convert AC electrical energy into mechanical energy to drive the load. [0003] The asynchronous motor is composed of a stationary part (stator), an intermediate space between stator and rotor (air gap), and a rotating part (rotor). The high-voltage three-phase AC power supply is connected to the three-phase windings of the stator of the asynchronous motor to generate a rotating magnetic field. The magnetic circuit formed by the stator core, the air gap, and the rotor core performs electromagnetic induction, and induces a voltage in the rotor winding to induce a current. Under the action of the ro...

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Problems solved by technology

[0011] 1. The end of the stator of the asynchronous motor is mainly composed of the end iron core and the end winding. When the motor is running, a strong electromotive force and electromagnetic vibration will be generated on the stator winding. The stator winding at the end must be firmly fixed. , such as using end hoops, binding straps, ribbed plates, etc., but the stator winding at the above-mentioned end protrudes from the iron core for a long period, and there is a gap between the stator end 31' and the stator sealing cavity wall 2', that is, the stator end part 31' is suspended, so accidents such as stator winding loosening and falling off easily occur at the end part 31' of the stator

[0012] 2. The stator sealing sleeve wall 4' is directly socketed on the bottom of the stator sealing cavity wall 2', and there will be a large space under the stator winding end 31', which makes the volume of the stator sealing cavity too large , a relatively large amount of cooling medium needs to be stored in the cavity. The currently used evaporative cooling medium is a green surrounding chemical product, which is expensive. Therefore, the cost of the asynchronous motor is high and the market competitiveness is low.

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