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Steam leakage simple bearing

A technology of bearings and rotating bearings, applied in the direction of shafts and bearings, bearing components, non-variable pumps, etc., can solve problems such as damage to sealing functions, and achieve the effects of preventing steam leakage, simple overall size, and reliable sealing

Pending Publication Date: 2022-05-10
尼得科GPM有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the sealing lip is lubricated by cooling water, it is observed that deposits form under the dynamic sealing surface of the sealing lip, which also impairs the sealing function after a certain period of time

Method used

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  • Steam leakage simple bearing

Examples

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Embodiment Construction

[0035] figure 1 Shown is a shaft bearing used in the present example in a pump housing of a water pump (not shown) between a pump chamber and an electric motor. The shaft bearing is designed as a sintered plain bearing, ie a rolling bearing part 11 which absorbs the radial forces of a rotating shaft as a plain bearing sleeve. Plain bearing bushings are made of a porous, sintered metal alloy. The shaft 3 to be installed in the water pump is housed in the plain bearing bushing through a radial bearing gap of less than 15 μm. In addition, the sliding properties between the shaft 3 and the porous sintered material are given by the lubricant filling described below.

[0036] The sealed shaft bearing 1 is designed to be sealed and ready to be mounted between a cooling side 4 (corresponding to the liquid medium in the pump chamber in the previous design) and an air side 5 (corresponding to a pump with electric motor in the previous design). drive side). The seal of the shaft bear...

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Abstract

The invention relates to a shaft bearing (1) with a sealing structure (2) for preventing leakage of steam during temperature or pressure change between an aqueous medium on one side and an air medium on the other side in a simple bearing. The shaft bearing with a seal is characterized in that, between the main radial seal and a swivel bearing portion (11), a lubrication space is provided around an outer surface of a shaft to receive an amount of lubricating grease, having a higher viscosity than lubricating oil and cooling water, a volume compensator (23) for compensating a temperature-dependent volume change is vertically arranged to interact with the volume of the lubricating oil and / or the volume of the lubricating grease.

Description

technical field [0001] The present invention relates to a compact bearing having a sealing arrangement to prevent possible steam leakage between a liquid medium on one side and a compact bearing on the other side. Background technique [0002] In the technical field of pumps and turbines, it is known to seal a drive shaft structurally between a transmission medium running in a pump chamber opposite a drive side. For example, in a pump chamber structure, a leakage chamber is provided between the shaft seal in a pump chamber and the shaft bearing below it. A small amount of leakage flow that breaks through the shaft seal on the pump chamber is captured by the leakage chamber and evaporates through the discharge line at operating temperature. This prevents leakage flow from reaching the shaft bearings below, or exposing the electric motor below to moisture. This feature of sealing a shaft against leakage flow requires considerable installation space. [0003] Furthermore, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/74F16C33/66F04D29/10F04D29/046F04D29/06
CPCF16C33/743F16C33/6681F16C33/6688F16C33/667F04D29/108F04D29/0462F04D29/061F16C33/104F16C2360/44
Inventor 弗朗茨·帕维勒克马塞尔·伯纳
Owner 尼得科GPM有限公司