CN202328337U

CN202328337U - Sealing device for rotor of rotary air preheater

Info

Publication number: CN202328337U
Application number: CN2011204706538U
Authority: CN
Inventors: 彭玉林
Original assignee: HARBIN RUNHE TECHNOLOGY Co Ltd
Current assignee: HARBIN RUNHE TECHNOLOGY Co Ltd
Priority date: 2011-11-23
Filing date: 2011-11-23
Publication date: 2012-07-11
Anticipated expiration: 2021-11-23

Abstract

The utility model discloses a sealing device for a rotor of a rotary air preheater, which relates to a sealing device. The sealing device aims to solve the problem that a connecting spring between a sealing fin of an existing sealing device for a rotor of a rotary air preheater and a fixing plate yields and is broken after being used for a period of time, a gap between a sector plate and a partition bin plate cannot be filled by the sealing fin, and accordingly air leakage is caused. The upper end of an upper fixing plate of the sealing device is fixedly connected with an upper alloy shaft, the lower end of an upper sealing fin is fixedly connected with an upper hard alloy steel shaft sleeve, the upper alloy shaft is inserted into the upper hard alloy steel shaft sleeve, the lower end of a lower fixing plate is fixedly connected with a lower alloy shaft, the upper end of a lower sealing fin is fixedly connected with a lower hard alloy steel shaft sleeve, the lower alloy shaft is inserted into the lower hard alloy steel shaft sleeve, and a plurality of counterweight parts are mounted on the lower sealing fin. The sealing device is used for eliminating smoke leakage of the rotary air preheater.

Description

A kind of rotary regenerative air preheater rotor is used sealing device

Technical field

The utility model relates to a kind of sealing device, is specifically related to a kind of rotary regenerative air preheater rotor and uses sealing device.

Background technology

Rotary regenerative air preheater is to utilize the hot flue gas that the coal-burning boiler afterbody is discharged in the thermal power plant, with a kind of heat-exchange device of cold air heating back entering boiler auxiliary combustion, is used widely on the heavy duty boiler in modern times; Gapped between rotor in the rotary regenerative air preheater and fanning strip, arc and the air preheater shell, between the air side of preheater and the fume side bigger pressure reduction is arranged simultaneously, cause air side to be revealed to fume side; Promptly produce the problem of leaking out, leaking out causes that the heating power operating mode is relatively poor rapidly, quickens the cold end corrosion process; Reduce generatine set heat efficiency; Increase the ventilating machinary power consumption, boiler efficiency is reduced, influence the unit overall operation.At present, along with the continuous increase of boiler capacity, rotary regenerative air preheater is also increasing; This makes problem such as leak out more outstanding, and the air leak rate of air curtain of rotary regenerative air preheater general requirement in design is not more than 10%, but mostly practical application is 15%～20%; Sometimes even higher, the main cause that rotary air preheater air leak is big is that rotor with variations in temperature irregular mushroom deformation takes place, and causes between apex seal and the fanning strip, the excesssive gap between axial seal sheet and the arc; The size of air leak rate of air curtain is to weigh an important indicator of rotary regenerative air preheater technical merit, solves the rigid straight plate Sealing Technology of the general employing of the problem of leaking out, and promptly reserves seal clearance by calculating the hot shaping parameter in advance; Because the elasticity of rigid straight plate seals is relatively poor; Preset clearance between sealing surface and the diaphragm seal can not be too small, can produce clamping stagnation otherwise be in operation, and can make between rotor and shell, the fanning strip and scratch; The equipment that influences normally moves; And a slot reservation is excessive, can not well seal, and makes the hot operating increasing of leaking out of rotary regenerative air preheater.Existing rotary regenerative air preheater rotor is connected with employing spring between the diaphragm seal of sealing device and the fixed head; When minute partition panel passed through fanning strip, diaphragm seal had been filled up fanning strip and has been divided the space between the partition panel, after minute partition panel passes through fanning strip; The playback of spring pulling diaphragm seal; Operation a period of time rear spring is surrendered, is ruptured, and diaphragm seal can't be filled fanning strip and divided the space between the partition panel, thereby produces air leakage phenomena.

The utility model content

The utility model is for solving existing rotary regenerative air preheater rotor with being connected between the diaphragm seal of sealing device and the fixed head producing surrender after spring uses a period of time, rupturing; Cause diaphragm seal can't fill the space between fanning strip and the branch partition panel; And then produce the problem of air leakage phenomena, and then propose a kind of rotary regenerative air preheater rotor and use sealing device.

The utility model is to address the above problem the technical scheme of taking to be: the utility model comprises black box and lower seal assembly; The said black box of going up comprises upper mounted plate and last diaphragm seal; Said lower seal assembly comprises bottom plate and lower sealing piece; The utility model also comprise the alloy axle, down the alloy axle, go up hard alloy steel axle sleeve, hard alloy steel axle sleeve, a plurality of counterweight, a plurality of counterweight and a plurality of balancing pole down gone up down, the upper end of said upper mounted plate and last alloy axle are affixed, the lower end and the last hard alloy steel axle sleeve of said upward diaphragm seal are affixed; The said alloy axle of going up is inserted in the hard alloy steel axle sleeve; Counterweight is connected with the lateral wall of last hard alloy steel axle sleeve through balancing pole on each, and the lower end of said bottom plate is affixed with following alloy axle, and the upper end of said lower sealing piece is affixed with following hard alloy steel axle sleeve; Said alloy axle down is inserted into down in the hard alloy steel axle sleeve, and a plurality of counterweights down are installed on the lower sealing piece.

The beneficial effect of the utility model is: the utility model links together sealing plate and diaphragm seal through alloy axle and hard alloy steel axle sleeve; The leakage cigarette phenomenon that elimination produces because of spring failure, because the hard alloy steel axle sleeve adopts hard alloy steel to make, the utility model is sustainable more than practical ten years; Reduced use cost; The utility model is simple in structure, and is easy to make, installs succinct.

Description of drawings

Fig. 1 is that the utility model is installed in the front view on branch partition panel of rotary regenerative air preheater rotor, and Fig. 2 is the left view of Fig. 1.

The specific embodiment

The specific embodiment one: combine Fig. 1 and Fig. 2 that this embodiment is described; The said a kind of rotary regenerative air preheater rotor of this embodiment comprises black box 1 and lower seal assembly 2 with sealing device; The said black box 1 of going up comprises upper mounted plate 1-1 and last diaphragm seal 1-2; Said lower seal assembly 2 comprises bottom plate 2-1 and lower sealing piece 2-2; This embodiment also comprise alloy axle 3, down alloy axle 4, go up hard alloy steel axle sleeve 5, hard alloy steel axle sleeve 6, a plurality of counterweight 7, a plurality of counterweight 8 and a plurality of balancing pole 9 down gone up down, the upper end of said upper mounted plate 1-1 and last alloy axle 3 are affixed, lower end and the last hard alloy steel axle sleeve 5 of said upward diaphragm seal 1-2 are affixed; The said alloy axle 3 of going up is inserted in the hard alloy steel axle sleeve 5; Counterweight 7 is connected with the lateral wall of last hard alloy steel axle sleeve 5 through balancing pole 9 on each, and the lower end of said bottom plate 2-1 and following alloy axle 5 are affixed, and the upper end of said lower sealing piece 2-2 and following hard alloy steel axle sleeve 6 are affixed; Said alloy axle 4 down is inserted into down in the hard alloy steel axle sleeve 6, and a plurality of counterweights 8 down are installed on the lower sealing piece 2-2.

The specific embodiment two: combine Fig. 1 that this embodiment is described, the axis of each balancing pole 9 of the said a kind of rotary regenerative air preheater rotor use sealing device of this embodiment and the angle of upper mounted plate 1-1 side are 0 °-120 °.Other composition and annexation are identical with the specific embodiment one.

Operation principle

After the utility model is installed on the branch partition panel of rotary regenerative air preheater rotor; When last diaphragm seal 1-2 and lower sealing piece 2-2 process fanning strip; Last diaphragm seal 1-2 and lower sealing piece 2-2 run-off the straight; When last diaphragm seal 1-2 and lower sealing piece 2-2 through behind the fanning strip, last counterweight 7 and following counterweight 8 pullings upward diaphragm seal 1-2 and lower sealing piece 2-2 are playbacked.

Claims

1. a rotary regenerative air preheater rotor is used sealing device; It comprises black box (1) and lower seal assembly (2); The said black box (1) of going up comprises upper mounted plate (1-1) and last diaphragm seal (1-2); Said lower seal assembly (2) comprises bottom plate (2-1) and lower sealing piece (2-2); It is characterized in that: said a kind of rotary regenerative air preheater rotor with sealing device also comprise alloy axle (3), down alloy axle (4), go up hard alloy steel axle sleeve (5), hard alloy steel axle sleeve (6), a plurality of counterweight (7), a plurality of counterweight (8) and a plurality of balancing pole (9) down gone up down; The upper end of said upper mounted plate (1-1) and last alloy axle (3) are affixed; The lower end and the last hard alloy steel axle sleeve (5) of said upward diaphragm seal (1-2) are affixed, and the said alloy axle (3) of going up is inserted in the hard alloy steel axle sleeve (5), and counterweight on each (7) is connected with the lateral wall of last hard alloy steel axle sleeve (5) through balancing pole (9); The lower end of said bottom plate (2-1) is affixed with following alloy axle (5); The upper end of said lower sealing piece (2-2) is affixed with following hard alloy steel axle sleeve (6), and said alloy axle (4) down is inserted into down in the hard alloy steel axle sleeve (6), and a plurality of counterweights (8) down are installed on the lower sealing piece (2-2).

2. use sealing device according to the said a kind of rotary regenerative air preheater rotor of claim 1, it is characterized in that: the angle (α) of axis of each balancing pole (9) and upper mounted plate (1-1) side is 0 °-120 °.