Compressor and compressor production method

The compressor design addresses thrust load issues by using a lubricating oil flow path with throttles to manage upward forces, ensuring reliability and reducing sliding losses, thus improving efficiency and preventing seizure.

EP4772752A1Pending Publication Date: 2026-07-08MITSUBISHI HEAVY IND THERMAL SYST
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
MITSUBISHI HEAVY IND THERMAL SYST
Filing Date
2024-10-16
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Compressors experience efficiency decreases and reliability issues due to excessive thrust loads generated by the self-weight of the rotation shaft, leading to sliding losses and potential seizure at the end surface of the rotation shaft and thrust bearing.

Method used

A compressor design that includes a lubricating oil flow path with a throttle to adjust the pressure loss, reducing the thrust load by using an oil supply pump to discharge lubricating oil toward the rotation shaft's lower end, and guiding it upward through a lubricating oil flow path with at least one throttle to manage the upward force.

Benefits of technology

Reduces thrust loads, ensures rotation shaft reliability, and minimizes sliding losses by adjusting the upward force on the rotation shaft, thereby enhancing compressor efficiency and preventing potential seizure.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a compressor and a compressor production method which make it possible to reduce a thrust load that is produced by the weight of a rotary shaft. The present invention comprises a rotary shaft (30) that drives a compression mechanism (20) by rotating about a central axis (X) which extends in the vertical direction, and an oil supply pump (60) that is provided below the rotary shaft (30) and that discharges lubricating oil toward a lower end of the rotary shaft (30), wherein the rotary shaft (30) has a lubricating oil flow path (42, 44a, 51a) that guides, upward from the lower end thereof, the lubricating oil discharged from oil supply pump (60); and the lubricating oil flow path (42, 44a, 51a) is provided with at least one orifice throttle (51b) that imparts a pressure loss to the lubricating oil flowing therethrough.
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