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Lead-free steam turbine seal grease and preparation method thereof

A cylinder sealing and steam turbine technology, which is applied in the field of steam turbine cylinder sealing grease and its preparation, and the field of steam turbine cylinder sealing grease, can solve the problems of human body and environmental hazards, etc., and achieves the effect of firm film layer, enhanced temperature resistance performance, and firm structure

Inactive Publication Date: 2012-09-26
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, in order to improve the sealing performance of the sealing grease, it is usually necessary to add toxic heavy metal red lead powder into the supercritical steam turbine cylinder seal grease, and the red lead powder will cause great harm to the human body and the environment. to solve the problem of major hazards, and then provide a lead-free sealing grease that can work under supercritical conditions, has excellent sealing performance, and does not contain red lead powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The new environmentally friendly lead-free steam turbine cylinder sealing grease described in this example is composed of raw materials: 200g of refined oil and 800g of inorganic filler, wherein the refined oil is soybean oil, which is filtered and removed and boiled to 80 poise at 120°C (25°C), in the inorganic filler, the inorganic filler is composed of the following materials, 600g (60 parts) of composite iron-titanium powder, 100g (10 parts) of graphite powder, and 100g (10 parts) of reduced iron powder .

[0031] The preparation method of sealing grease described in the present embodiment is as follows:

[0032] (1) Put the above-mentioned specific amount of refined oil, composite iron-titanium powder, graphite powder, and reduced iron powder into a stirrer with a stirrer, and stir evenly;

[0033] (2) heat-treating the mixture obtained in step (1) at a temperature of 80°C, and the heat-treatment time is 3 hours;

[0034] (3) Grind three times on the three-roller...

Embodiment 2

[0037] The new environment-friendly lead-free steam turbine cylinder sealing grease described in this embodiment is composed of the following raw materials: 300 g of refined oil and 700 g of inorganic filler, wherein the refined oil is sunflower oil, which is filtered and removed and boiled at 130 ° C to 80 poise (25 ℃), in the inorganic filler, the inorganic filler is composed of the following materials, composite iron and titanium powder 409.9g (65 parts), graphite powder 81.98g (13 parts), white carbon black 18.91 g (3 parts), whisker calcium carbonate 63.06g (10 parts), reduced iron powder 126.12g (20 parts).

[0038] The preparation method of sealing grease described in the present embodiment is as follows:

[0039] (1) Put the above-mentioned specific amount of refined oil, composite iron-titanium powder, graphite powder, white carbon black, whisker calcium carbonate, and reduced iron powder into a stirrer with a stirrer, and stir evenly;

[0040] (2) heat-treating the ...

Embodiment 3

[0044] The new environment-friendly lead-free steam turbine cylinder sealing grease described in this embodiment is composed of the following raw materials: 400 g of refined oil and 600 g of inorganic filler, wherein the refined oil is corn oil, which is filtered and removed and boiled to 80 °C at 140 ° C. poise (25°C), among the inorganic fillers, the inorganic fillers consist of the following materials: 398.23g (75 parts) of composite iron-titanium powder, 90.26g (17 parts) of graphite powder, and 5.31g of white carbon black (1 part), whisker calcium carbonate 26.55g (5 parts), reduced iron powder 79.65g (15 parts).

[0045] The preparation method of sealing grease described in the present embodiment is as follows:

[0046] (1) Put the above-mentioned specific amount of refined oil, composite iron-titanium powder, graphite powder, white carbon black, whisker calcium carbonate, and reduced iron powder into a stirrer with a stirrer, and stir evenly;

[0047] (2) heat-treating...

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Abstract

The invention provides lead-free steam turbine seal grease and belongs to the field of sealant preparation. The lead-free steam turbine seal grease is composed of refined grease and inorganic filler, and the inorganic filler is made of compound ferrotitanium powder, graphite powder, white carbon black, whisker calcium carbonate and reduced iron powder. The reduced iron powder and the compound ferrotitanium powder are innovatively added into the inorganic filler without red lead powder. The prepared seal grease has the advantages of uniformity in viscosity, high resistance to corrosion, high temperature and high pressure and environment friendliness.

Description

Technical field [0001] The present invention involves a steam turbine cylinder sealing and its preparation methods, especially for a car cylinder sealing fat that can be used for supercritical -free motor turbines that can be used. Background technique [0002] With the rapid development of electricity equipment, thermal power generation has generally adopted a supercritical unit with large capacity. Due to its advantages of low energy consumption, energy saving, and emission reduction of unit power, it has become the main development trend of firepower power equipment.The turbine is one of the three major hosts of thermal power equipment. The sealing requirements of the cylinder binding surface are strict. In order to reduce thermal loss, it is required to be close to zero leakage.Above 26MPa, the adhesion, corrosion resistance and high temperature resistance of traditional sealing materials under this condition have been greatly affected, and the reduction of adhesion, corrosio...

Claims

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Application Information

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IPC IPC(8): C09K3/10
Inventor 赵悦菊王国刚杨占琴张珂轲管春生刘振强
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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