Single-component flexible sealing grease

A flexible sealing and sealing grease technology, applied in other chemical processes, chemical instruments and methods, reagents, etc., can solve the problems of inapplicable hot and cold alternating sealing plane, brittle, hard and inflexible, loss of sealing performance, etc.

Active Publication Date: 2009-03-18
SHANGHAI VINGNING NEW MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steam turbine is one of the three main engines of thermal power generation equipment, and the sealing of the joint surface of the cylinder is the key to the safe operation of the whole unit under high pressure and high temperature. The operating parameters of the supercritical unit are required to be above 580°C and above 26Mpa , traditional sealing materials cannot meet this condition
As the seal of the column surface of mechanical equipment, the commonly used sealing materials are generally divided into solid gasket type and liquid gel type. The size of the solid gasket is fixed and has no adhesion to the flange surface. There are certain limitations in application. Liquid The type can ensure 100% contact be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Example 1: Put 1000g of refined raw lacquer, 2000g of iron-titanium powder, 500g of graphite powder, 50g of red lead powder, 50g of whisker calcium carbonate, 25g of silicone coupling agent KH-550, and 5g of drier manganese naphthenate into the reaction Kettle, stirred for 1-2 hours, mixed evenly and then packed to make general-purpose one-component flexible sealing grease.

example 2

[0011] Example 2: Mix 1000g of refined raw lacquer, 2000g of iron-titanium powder, 700g of graphite powder, 20g of coupling agent KH-550, 5g of drier iron naphthenate, mix and discharge to make a flange with a slightly larger sealing gap. Sealant.

example 3

[0012] Example 3: Heat 1000g of refined raw lacquer at 200°C for 2 hours to increase its viscosity to 100 poise (25°C), then mix it with 2000g of iron-titanium powder, 300g of graphite powder, coupling agent KH-550, 20g, and drier Stir and mix 5g iron naphthenate and discharge to make more pressure-resistant sealant.

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PUM

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Abstract

The invention relates to single-component flexible sealing grease, which is mainly applied to the sealing of the cylinder junction surface of a steam turbine of a thermoelectric generator unit. The sealing performance of a junction surface of the thermoelectric generator unit can guarantee whether the unit can safely operate at high temperature and high pressure, but the prior sealing material fails to maintain the sealing performance at high temperature and high pressure. The sealing grease is characterized in that the sealing grease is a liquid pasty fluid at normal temperature, is easy to store and construct, and can be quickly cured when the sealing grease is heated to certain temperature; and a colloid is changed into a sealing material with certain toughness, can resist high temperature of 680 DEG C and high pressure of 320MPa, is surface chemistry resistant and anti-creeping, and can effectively prevent gas or liquid media from being leaked.

Description

technical field [0001] The invention belongs to the field of sealant preparation, and in particular relates to a single-component temperature-resistant and pressure-resistant flexible sealing grease. Background technique [0002] With the rapid development of electric power equipment, thermal power generation has generally adopted supercritical large-capacity units, which have become the mainstream of thermal power generation equipment due to their advantages in low energy consumption per unit of power generation, energy saving and emission reduction. The steam turbine is one of the three main engines of thermal power generation equipment, and the sealing of the joint surface of the cylinder is the key to the safe operation of the whole unit under high pressure and high temperature. The operating parameters of the supercritical unit are required to be above 580°C and above 26Mpa , traditional sealing materials cannot meet this condition. As the seal of the column surface of...

Claims

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Application Information

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IPC IPC(8): C09K3/10
CPCY02P20/141
Inventor 宋大明
Owner SHANGHAI VINGNING NEW MATERIALS & TECH
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