Elastic sheet contact type sealing device of rotary air preheater

An air preheater and contact sealing technology, which is applied in the field of mechanical equipment sealing, can solve problems such as unreasonable sealing structure and large air leakage rate, and achieve the effects of low air leakage rate, reasonable structural design, and shortened assembly and repair cycle

Inactive Publication Date: 2010-07-28
宁波市镇海福尔迅电梯部件厂
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of unreasonable sealing structure and large air leakage rate of the existing rotary air preheater, and provide a rotary air preheater that realizes no gap sealing through the elastic contact between the elastic sheet and the sector plate. Heater Elastic Thin Contact Sealing Device

Method used

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  • Elastic sheet contact type sealing device of rotary air preheater
  • Elastic sheet contact type sealing device of rotary air preheater
  • Elastic sheet contact type sealing device of rotary air preheater

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Example 1: as Figure 9 The elastic sheet 31 shown is an unnotched sheet 31a, which is a full sheet without any notches.

[0046] Implementation two: if Figure 10 The elastic sheet 31 shown is a rectangular slot sheet 31b, and a rectangular slot 310 is provided at the sealing working end of the elastic sheet, so that the elastic sheet has more elasticity when working.

[0047] Implementation three: as Figure 11 The elastic sheet 31 shown is a serrated notch sheet 31c, the notch of the sealing working end of the elastic sheet 31 is formed into serrated notch 311, and each serrated notch 311 is in a trapezoid shape.

[0048] In the length direction of the component mounting main board 33, the interface between the sealing element 3 and the sealing element also has various embodiments, see Figure 12 .

[0049] Embodiment 1 of the interface between the sealing elements 3: the form of concave-convex fit, such as Figure 13 , When assembling the elastic sheets, each s...

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Abstract

The invention relates to the technical field of device sealing, in particular to an elastic sheet contact type sealing device of a rotary air preheater, solving the problems of unreasonable sealing structure and large air leakage rate of a traditional rotary air preheater. The elastic sheet contact type sealing device comprises a sector plate, a radial partition plate and an axial curved plate. Sealing devices are arranged at the cold end and the hot end of a rotor of the rotary air preheater; the sealing devices comprise a plurality of sealing elements; the elements comprise element installation main plates and a plurality of layer of elastic sheets arranged on the element installation main plate; protection sheets are arranged between every two layers of adjacent elastic sheets; the working end of the elastic sheets is 5 to 20 mm higher than the sealing end face of the sector plate; and when the air preheater is rotated, the sealing elements rotate to the position below the radial sector plate of the rotary air preheater and the position of the axial curved sealing plate, and the elastic sheets, one end face of the sector plate and the axial curved sealing plate are sealed in the elastic contact mode.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment sealing, in particular to an elastic sheet contact sealing device of a rotary air preheater. Background technique [0002] Rotary air preheater is an important equipment on large and medium-sized power station boilers and is widely used. It is a regenerative heat exchanger that operates in a counter-current manner, realizing heat exchange between flue gas and air, and supporting power station boilers. Air leakage rate is an important technical indicator of air preheater. Effective control of air leakage rate will save energy and gain benefits from reducing power consumption of supply and induced draft fans and improving boiler efficiency. [0003] From the analysis of the existing air preheater usage, the air leakage rate of each air preheater should be less than 6% in the first year when the rated output of the unit is required, but in fact it is more than 8%, or even as high as 22%....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/00F16J15/16
CPCY02E20/34
Inventor 沈士帆
Owner 宁波市镇海福尔迅电梯部件厂
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