JPH01118095A - Heat exchanger of rotary type - Google Patents

Abstract

PURPOSE:To continue smooth operation for a long time, always keeping a sealing function, by sealing the upper outer edge of a rotor by a ring seal, by molding the side part of a rotor so as to curve outwardly, and by bringing an annular protrusion into tangential contact with a curved part. CONSTITUTION:Hot exhaust gas is fed from an inlet 15, gas heat is accumulated in the heat-accumulating part 2 of a rotor 1, and the gas is discharged from an outlet 16. The heat-accumulated part 2 is rotated and is moved from a space 8 to a space 9, where the heat is radiated to the air which is fed from the inlet 17 of a space 9, and the heated air is discharged from an outlet 18 for use. A ring seal 26 is brought into contact with the upper edge of the holder 4 of a rotor 1. An annular protrusion 52 is formed on the annular part 33 of a base 14. It supports the holder 4 by contacting to the lower edge 4b of a holder 4. The side of a holder 4 is formed being curved outwardly. The side is brought into tangential contact with the annular protrusion 51 formed projected to the inside of the protrusion 27 of a shell 13, all around the periphery. A structure is such that the side of a holder 4 can be always brought into contact with the protrusion 51 tangentially, and a sealing function can be effective even if the axis of a rotor 1 is inclined.

Description

[Detailed description of the invention] Industrial applications The present invention uses a rotor that performs heat storage/radiation.

Regarding rotary heat exchangers.

Background Art In such a rotary heat exchanger, high-temperature exhaust gas of, for example, about 1000°C is supplied to one space to heat the rotor and store heat, and this rotor is driven to rotate and reaches the other space. Then, heat is radiated by contacting, for example, air at about room temperature, and thus the air is heated and heat exchange is performed.

Problems to be Solved by the Invention In such a rotary heat exchanger, the temperature of the exhaust gas supplied to the one space is high, and the air at about room temperature is supplied to the other space, so that the temperature difference is small. It is desired that the rotor be rotated smoothly even if such thermal deformation occurs, and that the sealing function of the rain space be excellent.

An object of the present invention is to provide a rotary heat exchanger that allows a rotor that performs heat storage/radiation to be operated smoothly and continuously over a long period of time.

Means for Solving the Problems The present invention provides a rotary heat exchanger in which a rotor that performs W heat/heat radiation is arranged to rotate across two partitioned spaces. An annular sealing material made of a heat-resistant elastic material is contacted and sealed, the lower center of the rotor is supported by a thrust bearing so that the axis of the rotor can be tilted, and the side of the rotor is curved outward convexly around the entire circumference. This rotary heat exchanger is characterized in that the annular protrusion is in line contact with the side portion of the rotary heat exchanger for sealing.

According to the present invention, the rotor is arranged to rotate across two partitioned spaces, and the upper outer peripheral end face of the rotor is sealed with an annular sealing material. The lower central portion of the rotor is supported by a thrust bearing such that the axis of the rotor can be tilted. Therefore, even if the rotor is thermally deformed and the axis of the rotor is tilted, the thrust bearing supports the rotor so that it can rotate smoothly.

In addition, the side part of the rotor is curved outward over the entire circumference, and the annular protrusion is in line contact with this side part for sealing, so even if the axis of the rotor is tilted, the seal 81
ability is always achieved. In this way, it becomes possible to smoothly operate the rotor continuously for a long period of time.

Embodiment FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the section line (■--■) in FIG. Referring to these drawings, a rotor 1 having a substantially vertical axis of rotation is fixed to an annular heat storage material 2 having a large number of through holes communicating in the axial direction, and a central portion of this heat storage material 2. It includes a holding member 3 and a holding member 4 that holds the outer peripheral portion of the heat storage material 2.

The rotor 1 is made of ceramic. The rotor 1 is arranged to rotate across two spaces 8, 9 on the left and right in FIG. 1, which are partitioned by partition walls 6, 7 of the housing 5. The housing 5 includes an upper housing portion 10, a lower housing portion 11, an upper lid 12, a body 13, and an annular support member 14 provided on the body 13 and supporting the rotor 1.
This housing 5 is made of a material such as ceramics or metal. The rotor 1 is housed in a shell 13.

For example, 1000° C. from the inlet 15 of the housing part 11.
This high-temperature exhaust gas contacts the heat storage material 2 of the rotor 1 to store heat, and is then discharged from the outlet 16. The heat storage material 2 rotates from the space 8 to the space 9, comes into contact with, for example, room temperature air from the inlet 17 of the space 9, radiates heat, and heats the air. This heated air is discharged from the outlet 18 and used.

FIG. 3 is an exploded perspective view of the rotor 1, the upper part 1112, and the shell 13. A right cylindrical insertion hole 19 is coaxially formed in the holding member 3 at the center of the rotor 1 .

A fitting hole 20 having a rectangular cross section perpendicular to the axis is formed in the holding member 3 so as to be connected to the upper end of the insertion hole 19 .

A locking piece 22 formed at the end of the rotating shaft 21 is fitted into the fitting hole 20, and a lower end 21a of the zero rotating shaft 21, which is partially inserted into the insertion hole 19, is inserted into the fitting hole 20. , supported by radial bearings 23. The radial axis 9.23 is
It fits into the cylindrical body 24, and this cylindrical body 24 is connected to the linear top via the connecting piece 25! Continuing to 212. An annular sealing material 26 made of a heat-resistant elastic material such as asbestos or graphite is fixed to the lower end surface of the upper lid 12.

The sealing material 26 contacts the upper end surface of the holding member 4 of the rotor 1 . In this way, the sealing material 26 is attached to the holding member 4 of the rotor 1.
The upper end surface 4a and the top! Distance 11 from the lower end surface 12a of 212
(See FIG. 1) achieves the sealing function within a range of 1 mm with zero grooves, for example. The partition member 6 is connected to the connection member 25 .

The shell 13 includes a cylindrical portion 27 that surrounds the rotor 1, and a cylindrical portion 27 that surrounds the rotor 1.
7. A connecting member 29 corresponding to the aforementioned connecting piece 25 is provided on the bottom 28, and a receiving piece 30 is formed on this connecting member 29 at the center position of the rotor 1. A step 31 is formed on the bottom 28, and the support member 14 fits snugly into the step 31.
has an annular portion 33 and a connecting portion 34 extending across the annular portion 33. A support portion 35 that is received on the receiving piece 30 is formed in the connecting portion 34 . This support part 35 has
A recess 37 with a spherical seat 36 is formed. This recess 3
A head 40 having a spherical surface 39 of the bearing piece 38 is fitted into the head 40. A shaft 41 is connected to the head 40.
is fitted into an insertion hole 19 formed in the holding member 3 of the rotor 1.

The interval between the lower end surface of the heat storage material 2 and the upper end surface of the connecting piece 34 of the support member 14 is set to a slight gap 12 of, for example, about 50 to 80 μm, thereby preventing gas from leaking between the spaces 8 and 9. is prevented. When the head 40 of the bearing member 38 fits into the recess 37 of the support member 14, the spherical surface 39 comes into contact with the spherical seat 36, and the axis of the rotor 1 is supported in a tiltable manner.In this way, the thrust bearing 49 are configured.

An annular protrusion 52 is formed on the annular portion 33 of the support member 14, and this protrusion 52 contacts the lower end surface 4b of the holding member 4 to support the holding member 4.

The side portion 4C of the holding member 4 is curved to be convex outward, and the center of curvature of the side portion 4C is on the axis of the rotor 1 in the thickness direction of the rotor 1 (i.e., in FIGS. 1 and 1). 3
It is located at the center position (in the vertical direction of the figure). This side portion 4C is l
It is in line contact over the entire circumference with an annular protrusion 51 formed to protrude from the inner circumferential surface of the protrusion 27 of ll1413. In this way, even when the axis of the rotor 1 is inclined, the side portion 4c of the holding member 4 is always in line contact with the protrusion 51, and a sealing function is achieved.

The rotary shaft 21 is connected to a drive shaft 45 via a universal joint 44, and the drive shaft 45 is rotationally driven by a motor 46. The rotary shaft 21, the universal joint 44, and the drive shaft 45 are connected to room temperature air as described above. Since the radial bearing 23 and the stator bearing 49 are also provided in the space 9, thermal deformation can be prevented as much as possible, ensuring smooth continuous operation. Become.

By selecting the coefficient of thermal expansion of the rotor 1 to be smaller than that of the shell 13, even if the rotor 1 and the shell 13 contact high temperature exhaust gas in the space 8 and expand, the rotor 1 remains in the upper fl 12. This prevents the rotor 1 from colliding, which allows the rotor 1 to rotate smoothly.

Since the support member 14, the thrust bearing 49, and the holding member 4 are made of ceramic, the drag resistance can be kept low even in a high temperature environment.

Effects As described above, according to the present invention, an annular sealing material made of a heat-resistant elastic material is brought into contact with the end face of the upper outer peripheral part of the rotor to perform sealing, and the lower center of the rotor is formed so that the axis of the rotor can be tilted. It is supported by a thrust bearing, the side of the rotor is curved outward over the entire circumference, and the annular protrusion is in line contact with this side, so even if the axis of the rotor is tilted, it always provides a seal. function can be maintained.

In this way, a rotary heat exchanger that can be operated smoothly over a long period of time is realized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the section line 1--2 in FIG. 1, and FIG. 3 is an exploded perspective view of the rotor 1 and its vicinity. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Heat storage material, 3, 4... Holding member, 4C... Side part, 5... Housing, 14...
Support member, 23... radial bearing, 37... recess,
38... Bearing piece, 43... Annular protrusion, 49... Thrust bearing, 52... Protrusion agent Patent attorney Keiichi Nishikyo Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a rotary heat exchanger in which a rotor for storing/radiating heat is arranged to rotate across two partitioned spaces, a heat-resistant elastic material is provided along the entire circumference of the upper outer peripheral end surface of the rotor. The lower center of the rotor is supported by a thrust bearing so that the axis of the rotor can be tilted, and the side of the rotor is curved outwardly around the entire circumference. 1. A rotary heat exchanger characterized in that the annular protrusion is in line contact with the side portion of the rotary heat exchanger for sealing.