Oil-immersed water-proofing wire immersible motor for immersible pump and its making method

Abstract

The invention discloses the submersible electric motor with oil immersed type water proof wire used for submersible pumps and its manufacturing method. The characters of the motor are as follows. The stator coil is the waterproof wire coil winding. The media for cooling the case shell chamber containing the stator and rotor is the insulating oil. The sealing system is composed of the airtight chamber, the mechanical seal and the rubber oil seal. Water is as the filler of the airtight chamber. The invention provides the following effects: lowering the temperature rise of the motor, increasing the power and service life of the motor, preventing water sources from pollution. The invented motor is especially suitable to rural areas for micro irrigation, sprinkling irrigation or used in greenhouse.

Description

(1) Technical field [0001] The invention relates to a water conveying tool, in particular to a submersible pump used for irrigation and drainage of industry and agriculture and daily rural family drinking water. (2) Background technology [0002] Now, there are three kinds of submersible pumps commonly used, namely oil-immersed small submersible pumps, water-cooled submersible pumps and dry submersible pumps. Although they all have certain advantages, there are many shortcomings and deficiencies in practical application, mainly in: the coil winding of the main part of the oil-immersed small submersible pump is made of enameled wire, and the seal is made of mechanical seal and insulating oil. The chamber forms a sealing system, and the insulating oil is used as the cooling medium in the stator, rotor chamber and sealing chamber inside the submersible motor. Since the submersible motor works in water for a long time, as long as the mechanical seal is slightly damaged or defec...

AI Technical Summary

Problems solved by technology

it cannot be used in sewage

Since the stator and rotor inside the submersible motor use water as the cooling medium, water is a conductor, and the coil is immersed in water, resulting in a decrease in the insulation strength of the coil; when the submersible motor is frequently started, the strong current impact will cause the coil to break down. Practice has proved that , Most of the submersible motors are burnt out in this way; in addition, the rotating system of most small water-cooled submersible pumps uses bearings. Although rubber seals are installed at the bearing seats, water often enters the bearing seats during use, causing the bearings to be damaged. Poor lubrication, resulting in bearing damage

The coil winding of the dry submersible motor adopts enameled wire, and it is equipped with a mechanical seal and a sealing chamber. The sealing chamber is filled with insulating oil to form a sealing system. The disadvantages of the pump are the same, the insulating oil in the sealed chamber is easy to leak, resulting in water pollution; in addition, the air is used as the cooling medium of the stator and rotor, and the heat dissipation is poor, and the coil is easy to burn out

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