JPS5984089A - Rotary heat accumulating type heat exchanger - Google Patents

Abstract

PURPOSE:To restrict air leakage in a seal device by a method wherein a groove is provided on a casing and a seal member, interposed with a second seal material, is fitted into the groove. CONSTITUTION:The seal member 20, having T-shaped section, is provided with a slidingly contacting part 20A formed with a wide slidingly contacting surface 16 on the upper surface thereof and an engaging part 20B having a narrowed width and serving as the foot part thereof. A seal attaching groove 21 is provided on the casing side at a position corresponding to the engaging part 20B so as to have a small clearance with respect to the configuration of the engaging part 20B and, further, each circular grooves 20C, 21C are provided on the side surface of the engaging part 20B and the side surface of the groove 21 opposing to the side surface of the engaging part 20B. A seal band 22, formed into a string and having a resistance to heat, is loaded inbetween the circular grooves and is pressed by a pressing member 23 from the upper side thereof. The seal member 20 is preferable to be formed by utilizing ceramic or the like, whose thermal expansion is small and the resistance to heat is excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to rotary regenerative heat exchangers, and is an attempt to improve the sealing function of the sealing device.

For example, there is a conventional rotary regenerative heat exchanger as shown in Fig. 1 (for example, Jitsugan Sho, 1
(Refer to No. 2 “Sealing force adjustment device for rotary regenerative heat exchanger”).

Here, l is a cylindrical rotating heat storage body (hereinafter referred to as 1A) having a honeycomb-shaped flow path /A, and this core l
By driving a ring gear mounted on the outer peripheral surface of the ring by a drive device (not shown),
Rotate the core / around the central axis /B. J is the gas path where high-temperature gas is guided, ri is the exhaust passage, the left is the air passage where high-pressure low-temperature air is guided, and the high-temperature gas is the gas passage. When the air is guided from 11F to the air path /A, it supplies heat to ml 7 / through the flow path /A, and the air led to the air path 3 passes through the flow path /A of the core l from here. Aisle 6
When the core is led to the core 1, it receives heat from the core 1 and is preheated, thus performing heat exchange.

7A and 7B are respective sealing members sealing between the high temperature gas passage 3 and exhaust passage side and the air passage S and B side, and qA and 9B are sealing members around the upper and lower surfaces of the core l. The seal members are provided along approximately half the circumference and the entire circumference, respectively. In this example, the seal members 7A and qA are pressed against the surface of the core l by the pressure difference between the three bodies participating in heat exchange, and /θ is a membrane provided for this purpose, /l is a casing/, a redena on the 2nd side, and /3 is a sealing member holder.

Figure 2 (5) and (B) show such 11 transfer heat storage 2F.
i'4 shows an example of the sealing device 2I that goes into the exchanger, and the sealing member shown in Fig. 2<A) is 7B in Fig. 1.
and θ type corresponding to 9B. Here, as shown in FIG. 2(B), the seal member 9B is a casing/,
The seal members 7A and 9k shown in FIG.
Due to the pressing force obtained through the core L! ;1 The seal members 7B and 9B are pressed against the sliding surface /A, and slide along this [i /A] as the seal members rotate.

However, in such a sealing device, conventionally, the sealing members B and 9B themselves are made of metallurgical material, and the seal seat /l/ becomes hot, so the casing /, iq% of 2 p';
The ji reaches the seal seat, and the seal members ridges B, J, and wafer B also take shape. For this reason, the sliding contact surface /A is deformed into a convex shape and the sealing member 9 is shaped like an iVl.
B deforms into a mountain shape, and a large tel or 1 interval occurs in a wide range between the sliding surface of the core and the sliding surface of the seal members 7B and 9B, causing air leakage. 0 The purpose of the present invention is to overcome the following drawbacks and to improve the sealing device 1.
(Rotation 1 to suppress and control air leakage)
! It is possible to provide a J-thermal heat exchanger (there are two).

[Achieving this object] In the present invention, the seal member is not fixed to the seal seat of the casing, but a groove is provided at the seal member mounting position of the casing,
Fit the IR mating part of the seal part I4 into this groove, and install the λ-th seal between the mating part d) and the second part of i+i5. do.

The present invention will be described in detail below with reference to the drawings.

Third? Figure 7) and (B) show an embodiment of the present invention.
, where ζθ is the seal 1''il (material, seal part 4゛ in this example), ?θ has a one-sided T-shape and '/, r, and the seal part good λθ is the wide 111 ?The contact surface /6 is formed on the upper surface of the 1B contact part OA, and the b'l1 part has a lower fitting part 70B where the cap is narrowed. Part 92θB and corresponding casing/
, 3 in the position on the 2 side (G is the sumi seal f
fi't, groove, 2/ shape P bottom fitting part, 20
13 so that there is some play in IiC,
Furthermore, circular arcs 4-θC and 2/C7 are provided on the side surface of the fitting portion -0B and the side surface position opposite to this side surface of n+7:l/, respectively.

Therefore, in the case of the seal part I4pθ having the tC shape as described above, the fitting part, 27
7 B into the groove, 2/[1 (inset 1) γ,'(:1.7
0C,! :↑'1°・7. )/C with a sealing band with an ilF-like resistance i':'& fh W! C, I
t3; Rear presser member J, ? 4: Press Riko's sealing band +2 from above and secure the holding member with the fixing bolt 21/.

Note that it is preferable that the sealing member 20 be molded using a heat-resistant material such as Nanamix, which has low thermal expansion.By doing so, it is possible not only to prevent deformation of the sealing member 20, but also to Seal member - 〇 is the sealing band, 2.2
Since it is attached to the casing/J via the casing/, 24'? It is possible to prevent the seal member 20 from being affected by deformation in the FJ rim.

Furthermore, instead of forming such a sealing part and f θ with an integrated seven-piece mix, the forming part of the sliding contact surface/A can be formed by adhering, welding, screwing, etc. with another sealing member, etc. It goes without saying that the sealing band 7.2 may be made to have elasticity, so that the casing 1.2 and! ? ? -'/IH,Jll<Sasuruko,! in the sealing band J, 2 due to the effect of thermal deformation occurring on /'/! : Can be done.

frS4/Figure shows another example of the present invention, in which the sealing member 30 has a sliding contact portion 3θA having a sliding surface /6, a fitting portion 30B having a dovetail cross section, 31 is a band-like or bulk-like heat-resistant sealing material, and 3.2 is a groove for fitting.A sealing member is placed in the groove 3.2, and a low ?θ is used. Part, 3
0 Jl is sealed by sealing ii3/ so that they fit together 111 times, and then the white part, the fitting part from both sides of the dovetail side of 7Q11, and the fitting part from both sides of the dovetail side of 7Q11. Fix 3 and 7B with 3g bolts.

In this way, the sealing material 31 is held down by the holding part f. ,? A and
? I protrudes from the bottom of the tip of JR! 'Tap projection, 3J
While suppressing with C, pressing part H3,y A, 33B
so that the seal member 3θ is held and rotated. Na:l
13. Regarding the sealing effect and prevention of air leakage in this borrowed sealing device, see Figure 3 (A) and ).
It is the same as ``Hj^'', omitting the ``Hj^''.

FIG. A thin plate is placed, and one end of this thin plate is welded to the side wall of the groove facing the gas passage 3, and the other end is aligned with the side of the low meeting part ton and the lower end is The sealing member +
'O sliding contact part.

In such a borrowed seal prevention RF, the core l
The surrounding space sh is empty ≦ 1 P7:, , <, l,
There are two I7 connections and high pressure air! 'j: It's been done,
Since the pressure in the passage 3 is higher than anything else, the pressure difference causes the lower end of the extended state to be sealed by the sealing member 110.
By suppressing the mating portion of 1pζ on the OB side surface, the sealing performance can be maintained and the sealing member can be held.

t"In the following W1μ section, we have described an example in which the cross-sectional shape of the seal part is T-shaped and the fitting part is 1R. The shape is not limited to these T-shapes, and it is possible to fit the first intervening part into the rf9 of the casing, and then provide a sealing material to be loaded between these spaces. It is not an expert to say that it is only necessary to have a shape that can hold the objects in that position.

As explained above, according to the present invention, the fitting portion of the sealing member made of A material that does not fit into the support groove provided in the casing is removed, and the fitting portion and the support groove are removed. The fitting portion of the sealing member is fitted into the support groove of the casing, and the sealing material is held between the groove and the sealing material to seal between the sealing portion A4 and the casing. This not only prevents the conventional J seal part 4 from being thermally deformed together with the casing and causing a large amount of air leakage between the seal member and the casing, but also prevents a large amount of air from leaking between the seal member and the casing. It is also possible to improve the sealing performance of the seal member, and the seal member can be easily attached.

[Brief explanation of the drawing]

ff1ls Figure 7 shows the rotating regenerative heat exchanger II￥
2Pl] (A) is a perspective view of the θ-type seal portion H in the sealing device, WS2 (
B) 1 Cross-sectional view of the sealing device, Figure 3 and 01
) are a cross-sectional view and a partially detailed view showing an example of a sealing device in a rotary regenerative heat exchanger of the present invention, Figure 4 is a cross-sectional view of a sealing device in another embodiment of the present invention, and Figure 4 is a cross-sectional view of a sealing device in another embodiment of the present invention. It is a sectional view of the sealing device in still another example of . l...Core, /A...Flow P77% /B...Central axis, Colling gear r1 3...Ga: z; jg Shaft...UF ventilation shaft, t...empty ((1 aisle, left A...space, ?A, 7B, 7A, ta ■3... seal?'il
(I9, /θ... Membrane body, l/... Retainer, /, 7... Casing, /, ?... Holder, ///... Sea node 1.il , / to... Bolt, il... Sliding ty, #i7, βθ, JO, fθ... Seal 1119 I゛41.2θA, JθA, 4/θA... Sliding to Habe, −
〇B, JOB, 110R-...l ((fitting 1pe,)l)C,, 2/C...circular groove, λi, J, z, ty, 2...) pain, p, 1... Murayama Ri1shi, sword, ? ,? A, ,? ,? 11... Presser sound (-+
1, kuku...bolt, 3/...seal, 11-what, 3,? C...Culture °a r;, 1;, e/... Thin ik. Patent Law No. 12 Applicant: Nissan Jidosha Co., Ltd. Figure 2 (A) (B) Figure 3 (A) (B)

Claims (1)

[Scope of Claims] l) A rotary regenerative heat exchanger in which a sealing member that is in sliding contact with the core is attached to the casing, and the sealing member seals between two fluids passing through the core, The seal portion has a fitting portion that does not fit into the support groove provided in the casing, and is configured to hold a sealing member between the low fitting portion and the support groove,
A rotary regenerative heat exchanger, characterized in that the sealing member is supported in the support groove via the sealing member, and a gap between the casing and the sealing member is sealed. f) The rotary regenerative heat exchanger according to claim 1, wherein the sealing member is made of ceramic.