JPH044516B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a seal mechanism for preventing fluid leakage, which is installed on a surface of a rotary regenerative heat exchanger where a sector plate and a heat storage body move relative to each other. The present invention relates to a seal mechanism that improves the wear resistance and free movement of an elastic thin plate seal that always keeps the seal gap to a minimum against thermal deformation of a heat exchanger depending on the load.

(Prior Art) FIG. 1 is a sectional view of a radial partition wall portion of a vertical axis rotary regenerative heat exchanger. After initial setting of the floating elastic thin plate seal 1 installed in the radial direction as shown on the left side of the figure, when the heat exchanger receives a heat load,
The radial partition wall 3 of the rotating heat storage body supported by the low-temperature side bearing 2 is deformed into a state where the outer circumferential portion thereof is drooped, as shown on the right side of the figure, due to the temperature gradient occurring within the rotating heat storage body. Since the elastic thin plate seal 1 is attached to the radial partition wall 3 in a floating manner by the spring 4, even if the radial partition wall 3 is deformed in a drooping manner, the elastic thin plate seal 1 attached to the upper part is attached to the spring 4.
The elastic thin plate seal attached at the bottom is pressed against the sliding surface of the fan-shaped plate 6 attached to the casing 5 that guides the fluid by the weight of the sealing mechanism resisting the spring 4. As a result, the elastic thin plate seal 1 automatically comes into close contact over the entire length in the radial direction, and there is no gap between the elastic thin plate seal 1 and the fan-shaped plate 6, and therefore, there is almost no leakage of fluid. .

However, the force that presses the elastic thin plate seal 1 against the fan-shaped plate 6 is
As the thin elastic plate seal 1 rotates and slides on the sector plate 6, the tip of the seal tends to wear out relatively early. Also, when the elastic thin plate seal 1 is rotating in the fluid flow path portion where it does not slide with the fan-shaped plate 6, the elastic thin plate seal 1 is rotated by the spring 4.
Because it is pressed by the pressing force of , when the elastic thin plate seal 1 reaches the sector plate entrance point C where it starts sliding with the sector plate 6 while rotating in the direction of arrow B in FIG. 2 showing the A-A arrow view of FIG. The tip of the elastic thin plate seal 1 is suddenly pushed up to the sliding surface 7, slides on the sliding surface 7, and when it reaches the fan-shaped plate exit point D where it finishes sliding on the fan-shaped plate 6, it suddenly pushes against the sliding surface. 7 and performs sudden vertical movements before and after sliding with the fan-shaped plate 6, which accelerates the wear of the thin elastic plate seal 1 and causes problems such as rapid increases and decreases in the rotational resistance of the rotating heat storage body. be. Furthermore, elastic thin plate seal 1
The floating plate 12 to which the radial partition wall 3 is attached
According to the thermal deformation of the elastic thin plate seal 1 or the vertical movement of the elastic thin plate seal 1, it moves while sliding vertically with the radial partition wall 3, but the sliding gap between the floating plate 12 and the radial partition wall 3 is a fluid bypass. Since the gap is very small to prevent leakage, rust on the sliding surfaces and dust contained in the fluid often accumulate and stick in this gap, obstructing the sliding movement between the two. do.

For these reasons, there has been a demand for an improved floating seal mechanism for a rotary regenerative heat exchanger that has durability against wear, does not cause sudden vertical movement, and does not impede the free movement of the floating plates.

(Objective of the present invention) This invention was made in response to the above-mentioned request, and its purpose is to provide a part of the radially floating seal made of an elastic thin plate made of a wear-resistant material. By equipping the block seal, the wear resistance of the elastic thin plate seal is improved without losing the good sealing function and light weight of the conventional floating seal mechanism, and it can be connected to the sector plate and slid toward the fluid flow path side. Equipped with a movable ring to prevent sudden vertical movement of the thin elastic plate seal, and equipped with a member that does not cause rust on the sliding surface between the movable plate and the radial partition wall, which improves the movability of the seal mechanism. An object of the present invention is to provide a floating seal mechanism for a rotary regenerative heat exchanger that improves the performance of the rotary regenerative heat exchanger.

(Configuration of Embodiment) Embodiments of the present invention will be described below with reference to drawings of a vertical shaft rotary regenerative heat exchanger.

FIG. 3 is a side view of the radial partition wall 3 of the heat storage body rotating around the rotor column 16, with a part of the elastic thin plate seal 1 installed between the radial partition wall 3 and the sector plate 6 cut away. In place of the elastic thin plate seal 1 in the notch or notch, a block seal 17 made of a wear-resistant material such as cast iron or carbon is installed in the notch, and the elastic thin plate seal 1 and block seal 17 are Installed floating plate 12
In this case, the spring 4 presses the elastic thin plate seal 1 and the block seal 17 against the sector plate 6 at the upper part of the radial partition wall 3, and the spring 4 presses the elastic thin plate 1 and the block seal 17 against the sector plate 6 at the lower part. A spring 4 is provided to reduce the weight of the seal mechanism.

FIG. 4 is a view taken along the line E-E in FIG. 3, in which the floating plate 12 sandwiches the radial partition wall 3 with a small gap so that it can freely slide on the radial partition wall 3. A holder 18 for holding the block seal 17 is provided on the fan-shaped plate 6 side of the floating plate 12, and the holder 18 has an adjustment bolt 19 for adjusting the contact state between the block seal 17 and the sector-shaped plate 6. The sliding surfaces of the floating plate 12 and the radial partition wall 3 over the entire length in the radial direction are lined with a rust-resistant member 20, for example, a thin plate of stainless steel. Here, arrow F indicates the direction of rotation of the radial partition wall 3.

Figure 5 shows block seal 17 and sliding ring 21.
In the top view of the rotary regenerative heat exchanger equipped with When it finishes sliding with the fan-shaped plate 6 while rotating, the inner and outer guide rings 21 are disposed on the fluid flow path side and have sliding surfaces on the same plane as the sliding surface 7 of the fan-shaped plate 6. sliding with
Next, it slides on another fan-shaped plate 6, further slides on the sliding ring 21 disposed on the other fluid flow path side, and starts sliding on the original sector-shaped plate 6, and this operation is repeated thereafter. . If necessary, other sliding rings may be added in addition to the inner and outer sliding rings 21 concentrically with these sliding rings 21 and block seals that slide correspondingly thereto.

Although the floating seal mechanism of the above embodiment has been described with respect to the configuration of the seal mechanism in the radial partition wall of the vertical axis rotary regenerative heat exchanger, the seal mechanism of the present invention is not limited to this, and for example,
It is possible to configure the heat exchanger in the inner and outer circumferential directions of the rotating heat storage body, in the axial direction of the outer circumferential portion, and in the horizontal axis type rotary regeneration type heat exchanger, etc. The present invention also applies to block seals and sliding rings. Obviously, various modifications may be made without departing from the spirit.

(Effects of the present invention) By equipping a portion of the entire radial length of the elastic thin plate seal with a block seal, most of the force that presses the elastic thin plate seal against the fan-shaped plate in the conventional sealing mechanism is absorbed by the elastic thin plate seal itself. It becomes possible to release the seal through appropriate flexural deformation, and the released pressing force acts concentratedly on the block seal. Therefore, only a portion of the pressing force acts on the elastic thin plate seal, so the wear of the elastic thin plate seal due to sliding with the fan-shaped plate is extremely small.On the other hand, the block seal only receives a portion of the pressing force. Although the block seals are mostly active, they are constructed of wear-resistant materials and therefore do not suffer from premature wear due to sliding.

Block seals are generally heavier than elastic sheet seals per unit of seal length, but because they are used for only a portion of the seal length, they add little to the weight of the sealing mechanism, making the spring force particularly stronger than conventional types. Since this is not necessary, this improved sealing mechanism can take advantage of the lightweight features of conventional elastic thin plate sealing mechanisms.

By connecting to the fan-shaped plate and installing a sliding ring that has the same plane as the sliding surface of the fan-shaped plate on the fluid flow path side, the opening and exit of the fan-shaped plate, which occurs in conventional floating seal mechanisms, can be eliminated. This prevents sudden protrusion and push-in movements of the seal mechanism.
It becomes possible to reduce the wear of the elastic thin plate seal and make the rotation of the heat storage body smooth.

The rust-free members lined on the mutual sliding surfaces of the floating plate and the radial partition wall are
It does not cause rust, does not attract much dust in the fluid, and because it is a thin plate, it improves the fit between the sliding surfaces of both lining members over the entire length in the radial direction, and reduces the sliding gap. Even if it is made small, it is possible to maintain smooth movement between the floating plate and the radial partition wall.

As a result of the above-mentioned effects, the seal has good sealing performance against fluid leakage, is lightweight, has good free movement and wear resistance, and is a rotary regenerative type heat storage system that allows the heat storage body to perform smooth rotational movement. A floating seal mechanism for the exchanger can be provided.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the radial partition wall of a conventional rotary regenerative heat exchanger, and Figure 2 is A of Figure 1.
3 is a side view of a radial partition wall equipped with a block seal type sealing mechanism, and FIG. 4 is a view taken along the line E--E in FIG. 3. FIG. 5 is a top view of a rotary regenerative heat exchanger equipped with block seals and sliding rings. Incidentally, the symbols of the main parts in the figure are as follows. 1
... Elastic thin plate seal, 2 ... Low temperature side bearing, 3 ...
Radial partition wall, 4...Spring, 5...Casing, 6...Sector plate, 7...Sliding surface, 8...Spring bearing plate, 9...Adjustment nut bearing plate, 10...
Adjustment nut, 11... bolt, 12... floating plate,
13... Nut, 14... Bolt, 15... Insertion plate, 16... Rotor column, 17... Block seal, 18... Holder, 19... Adjustment bolt, 2
0... Rust-free member, 21... Sliding ring, 2
2...Heat storage body, B, F, G...Rotation direction, C...
Sector plate entrance, D...Sector plate exit.

Claims (1)

[Claims] 1. A fan-shaped plate attached to a casing that guides fluid and divides high-temperature fluid and low-temperature fluid, and a heat storage body containing a heat absorbing and heat dissipating material in a fan-shaped compartment partitioned by a plurality of radial partition walls. In a floating seal mechanism equipped to prevent fluid leakage on the relatively moving surface of a rotary regenerative heat exchanger with relatively moving surfaces, a part of the elastic thin plate seal is equipped with a wear-resistant block seal. A sliding ring is connected to the fan-shaped plate and installed on the fluid flow path side, and a member having free movement that does not cause rust is attached to the sliding surface of the floating plate and the radial partition wall. A floating seal mechanism for a rotary regenerative heat exchanger.