Immersion motors and pumps

JPWO2026013793A1Active Publication Date: 2026-01-15TMEIC CORP (100 00)
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Patent Information

Application Number
JP2024563126
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-10
Publication Date
2026-01-15
Estimated Expiration
2044-07-10

AI Technical Summary

Technical Problem

Conventional submerged pumps with canned motors have inefficiencies due to the wide gap between the stator and rotor, leading to low efficiency and high manufacturing costs, and the use of certain resins in these pumps can be decomposed by anhydrous ammonia, causing material deterioration.

Method used

The immersion motor and pump are designed with a stator and rotor coated with polyethylene-based heat-sealing materials, using corrosion-resistant materials like PVF resin or PEEK resin for wire coatings and polyethylene resin for gaps, ensuring stability in anhydrous ammonia environments.

Benefits of technology

The motor and pump can operate with high efficiency and durability when directly immersed in anhydrous ammonia, maintaining material integrity and performance over extended periods.

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Abstract

The immersion motor (12) of this embodiment includes a stator (33) and a rotor (32), each coated with a polyethylene-based heat-sealing material. The immersion pump (10) is an immersion pump equipped with the immersion motor, which includes a motor shaft (31) to which the rotor is fixed, a pump shaft (21) connected to the motor shaft, and a pump body (22) integrally formed with the pump shaft. Therefore, the immersion motor can be operated with high efficiency with the stator and rotor directly immersed in anhydrous ammonia.
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