Rolling type sealing device of air preheater

Abstract

Provided is a rolling type sealing device of an air preheater. A flexible seal of the air preheater is in sliding contact with a sector plate, abrasion inevitably exists between two objects which are in contact with each other and slide, the abrasion not only increases rotation resistance and causes current rise, but also seriously abrades the sector plate, and maintenance and replacement cost of the sector plate is increased. The device comprises a fixed plate (3) and a movable plate (10), the fixed plate is connected with the movable plate through a movable shaft (9), a support plate (1) is fixed on the movable plate, a shaft seat (5) is connected on the support plate, a support shaft (8) is fixed on the shaft seat, and a roller (7) is sleeved on the support shaft. And a spring seat (4) is fixed on the fixed plate and is connected with the support plate through a spring (6). The rolling type sealing device is used for rolling type sealing of the air preheater.

Description

Technical Field

[0001] The utility model relates to a rolling sealing device for an air preheater. Background Art

[0002] In the prior art, the flexible seal of the air preheater and the fan plate are in sliding contact. Engineering practice shows that there must be wear between two objects that are in contact with each other and have sliding. The wear not only increases the rotational resistance and causes the current to increase, but also seriously wears the fan plate, increasing the cost of repairing and replacing the fan plate. Utility Model Content

[0003] The utility model aims to solve the above-mentioned problems and provides a rolling sealing device for an air preheater.

[0004] The above purpose is achieved through the following technical solutions:

[0005] An air preheater rolling seal device, comprising a fixed plate and a movable plate, wherein the fixed plate and the movable plate are connected via a movable shaft, a support plate is fixed on the movable plate, a shaft seat is connected to the support plate, a support shaft is fixed on the shaft seat, and a roller is sleeved on the support shaft;

[0006] A spring seat is fixed on the fixing plate, and the spring seat is connected to the supporting plate through a spring.

[0007] The air preheater rolling sealing device has a notch on the fixed plate. Beneficial Effects

[0008] 1. The utility model uses rolling contact instead of sliding contact, so that there is no slippage on the surfaces of the two objects in contact. This principle solves the wear problem that has always plagued traditional flexible sealing devices from the source. Since there is no wear problem, the air leakage rate of the air preheater can be maintained at a low level for a long time, and the maintenance and replacement costs of the sealing device and the fan plate are greatly reduced.

[0009] 2. The utility model uses the pressure of the spring to enable the roller to be pressed against the sector plate all the time to maintain its sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is a side view of the utility model;

[0012] Figure 3 It is a schematic diagram of the structure when the utility model is used;

[0013] In the figure: 1. support plate; 2. notch; 3. fixed plate; 4. spring seat; 5. shaft seat; 6. spring; 7. roller; 8. support shaft; 9. movable shaft; 10. movable plate; 11. radial partition; 12. preheater. DETAILED DESCRIPTION

[0014] Reference Figure 1-Figure 2 , an air preheater rolling seal device, which comprises a fixed plate 3 and a movable plate 10, the fixed plate and the movable plate are connected by a movable shaft 9, a support plate 1 is fixed on the movable plate, a shaft seat 5 is connected to the support plate, a support shaft 8 is fixed on the shaft seat, and a roller 7 is sleeved on the support shaft;

[0015] A spring seat 4 is fixed on the fixing plate, and the spring seat is connected to the support plate via a spring 6 .

[0016] The air preheater rolling seal device has a notch 2 on the fixed plate.

[0017] Working principle: When using, refer to Figure 3 , multiple devices are fixedly connected to the radial partition 11 of the preheater 12 by bolts. After installation, the roller contacts the fan plate under the action of the spring to achieve rolling tight flexible sealing. The sealing surface and the fan plate are in elastic contact, and the maximum compensation amount can reach 70mm, which greatly reduces the air leakage gap caused by thermal deformation. This sealing device is made of stainless steel, which is not easy to rust, so the support shaft part will not be stuck. After a large number of units are used, it is fully proved that neither the roller nor the support shaft will be stuck, but will become more flexible with use.

Claims

1. An air preheater rolling seal device, characterized in that: The structure includes a fixed plate and a movable plate, wherein the fixed plate and the movable plate are connected via a movable shaft, a support plate is fixed on the movable plate, an axle seat is connected to the support plate, a support shaft is fixed on the axle seat, and a roller is sleeved on the support shaft; A spring seat is fixed on the fixing plate, and the spring seat is connected to the supporting plate through a spring.

2. The air preheater rolling seal device according to claim 1, characterized in that: The fixing plate is provided with a notch.

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