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Radial seal assembly for hot end of rotor of rotary air preheater

An air preheater and radial sealing technology, which is applied to the sealing of engines, engine components, lighting and heating equipment, etc., can solve the problems of complex sealing mechanism, affecting sealing performance, and easy failure of spring elasticity, so as to achieve good sealing effect , good reliability and simple structure

Inactive Publication Date: 2010-01-20
四川东能节能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the tracking movement of the fan-shaped plate at the hot end, the sealing mechanism in the equipment is extremely complicated, and it is inseparable from the guidance of the electronic displacement sensor. Due to the 300-400 ° C temperature field and the violent erosion of the flue gas in the equipment, its failure rate is high, and the sealing Low input rate of the system, resulting in large air leakage
[0005] At present, a new sealing technology has emerged in China: contact sealing, the radial sealing sheet installed at the hot end of the rotor is made into a hinge type and supported by a spring. Static sealing gap; this sealing technology relies on the rotation of the seal hinge and the compression of the spring to form a contact seal. If it can meet the sealing requirements at room temperature, it can be baked for a long time under the operating condition of 400°C in the air preheater. Baking, the sealing hinge is easy to be "bitten" by the heat state, the elasticity of the spring is easy to fail, and the contact seal will wear out
As a result, its sealing performance is affected, and the sealing reliability is poor

Method used

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  • Radial seal assembly for hot end of rotor of rotary air preheater
  • Radial seal assembly for hot end of rotor of rotary air preheater
  • Radial seal assembly for hot end of rotor of rotary air preheater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Depend on figure 1 and figure 2 As shown, the radial sealing assembly at the hot end of the rotor of the rotary air preheater includes a sealing sheet 1, an expansion assembly 2 and an installation structure; the middle part of the sealing sheet 1 is provided with a folding section 1a, and the expansion assembly 2 includes an Lower expansion elements 2a and 2b, one end of the two expansion elements is fixedly connected by bolts (not shown) and welding, the other end of the two is provided with a spacer 2c, and the two expansion elements 2a and 2b are welded to the spacer 2c Between the upper and lower expansion elements 2a and 2b, there are also several intermediate isolation plates 3, the intermediate isolation plates 3 are welded to the upper expansion element 2a, and the upper expansion element 2a is welded to the sealing sheet 1 above the folded section 1a The expansion coefficient of the upper and lower expansion elements 2b is greater than that of the upper expa...

Embodiment 2

[0033] Depend on image 3 and Figure 4 As shown, the radial sealing assembly at the hot end of the rotor of the rotary air preheater includes a sealing sheet 1, an expansion assembly 2 and an installation structure; the middle part of the sealing sheet 1 is a folded section 1a (such as Figure 5 and Figure 6shown), the expansion assembly 2 includes upper and lower expansion elements 2a and 2b, one end of the two expansion elements is fixedly connected by bolts (not shown) and welded, and a spacer 2c is arranged between the other ends of the two expansion elements. 2a and 2b are all welded and fixedly connected with the spacer 2c, and several intermediate isolation plates 3 are also arranged between the upper and lower expansion elements 2a and 2b, and the intermediate isolation plates 3 are welded and solidly connected with the upper expansion element 2a (such as Figure 7 and Figure 8 shown), wherein the upper expansion element 2a is welded on the sealing sheet 1 above ...

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Abstract

The invention discloses a radial seal assembly for a hot end of a rotor of a rotary air preheater, comprising a sealing sheet, an expansion assembly and an installation structure, wherein the middle of the sealing sheet is provided with a folding section; the expansion assembly comprises an upper expansion component and a lower expansion component, one end of the upper expansion component is fixedly connected with one end of the lower expansion component, a spacing block is arranged between the other end of the upper expansion component and the other end of the lower expansion component, both of the expansion components are fixedly connected with the spacing block, the upper expansion component is welded onto the sealing sheet on the folding section, and the expansion coefficient of lower expansion component is higher than that of the upper expansion component; and the sealing sheet is installed on a radial spacing board of the hot end of the rotor of the rotary air preheater by the installation structure. The invention has the advantages of simple structure, low cost, good sealing effect and good reliability.

Description

technical field [0001] The present invention relates to a radial seal assembly for the hot end of the rotor of a rotary air preheater. Background technique [0002] At present, the rotary air preheater is a necessary auxiliary equipment for large-scale thermal power plants and the chemical industry. Its main purpose is to use the flue gas at the tail of the boiler to heat the cold air and provide hot air to the boiler. The rotor carries the heating surface in the equipment. Rotating at a constant speed inside the boiler, the high-temperature flue gas at the tail of the boiler is sucked by the induced draft fan and passes through the heating surface of the rotating rotor of the air preheater on the flue gas side from top to bottom. The heating surface is thus heated and the flue gas is cooled; when heated When the heating surface rotates to the air side, the cold air passes through the heating surface from bottom to top under the push of the blower, absorbs heat to form hot a...

Claims

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Application Information

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IPC IPC(8): F23L15/00F16J15/16
CPCY02E20/34
Inventor 燕守志
Owner 四川东能节能技术有限公司