Anti-floating heat accumulator for heat accumulating type air heater

Abstract

The utility model discloses an anti-floating heat accumulator for a heat accumulating type air heater, which comprises a throat and a heat accumulating component arranged in the throat, and the heat accumulating component consists of a flow equalizing top cover and at least two layers of honeycomb-shaped porous bricks. The heat storage assembly is internally provided with at least one anti-floating structure which is the same as the honeycomb-shaped porous bricks in size and thickness. The cross section of the anti-floating structure is in a regular hexagon shape, round grooves are formed in the upper face and the lower face of the anti-floating structure, and airflow through holes are evenly distributed in the round grooves. According to the anti-floating heat storage body for the heat storage type air heater, through the design of the anti-floating structure, airflow of the heat storage assembly can be evenly distributed, and heat storage body floating caused by the too high airflow velocity is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat accumulator, especially to a kind of anti-floating heat accumulator for regenerative air heater. BACKGROUND

[0002] Hypersonic wind tunnel is an important experimental device for studying the aerodynamic characteristics of aircraft at hypersonic speed. One of its key core systems is the regenerative air heater, which is used to simulate the high-temperature environment encountered by aircraft during hypersonic flight. The regenerative air heater stores and releases heat through the heat accumulator to provide a stable high-temperature airflow. However, under actual working conditions, when the valve of the heater is opened, an instantaneous pressure relief occurs inside, resulting in the formation of high-speed airflow inside the heater. This high-speed airflow can exert a buoyancy force on the heat accumulator, causing it to float inside the heater and collide with other components, resulting in damage to the heat accumulator. The floating of the heat accumulator not only affects the normal operation of the heater, but also can lead to inaccurate experimental results, and even damage the wind tunnel equipment.

[0003] In the prior art, physical fixation methods are usually used to prevent the heat accumulator from floating, such as fixing the heat accumulator inside the heater through brackets, fixing frames, etc. However, these methods have the following disadvantages:

[0004] 1. Unable to effectively deal with high-speed airflow: Physical fixation methods are not effective in dealing with high-speed airflow. The buoyancy generated by the airflow passing through the heat accumulator can still cause the heat accumulator to displace, resulting in collision with other components.

[0005] 2. Restricting the thermal expansion of the heat accumulator: The heat accumulator will expand and contract during heating and cooling. Physical fixation methods can restrict its free expansion, leading to stress concentration and material fatigue, reducing the service life of the heat accumulator.

[0006] 3. Difficult to maintain and replace: The brackets and fixing frames that fix the heat accumulator increase the complexity and difficulty of operation when maintaining and replacing the heat accumulator, affecting the efficiency of the experimental equipment. INVENTION CONTENTS

[0007] In view of the defects in the prior art, the purpose of the present utility model is to provide an anti-floating heat accumulator for regenerative air heater, which can effectively reduce airflow speed, reduce buoyancy, prevent heat accumulator from floating and damage, and improve the operation stability and safety of the equipment by optimizing the structure of the heat accumulator.

[0008] To achieve the above purpose, the technical solution of the present utility model is as follows:

[0009] The application discloses an anti-floating heat accumulating body for a regenerative air heater, which comprises a throat and a heat accumulating assembly arranged in the throat, wherein the heat accumulating assembly is composed of a flow equalizing top cover and at least two layers of honeycomb-shaped porous bricks, and at least one anti-floating structure with the same size and thickness as the honeycomb-shaped porous bricks is arranged in the heat accumulating assembly; the anti-floating structure is a regular hexagon in cross section, and circular grooves are arranged on the upper surface and the lower surface of the anti-floating structure, and airflow through holes are uniformly arranged in the circular grooves.

[0010] Preferably, the throat is composed of a supporting part and a pipeline part, the supporting part is cylindrical, and the pipeline part is arranged in the center of the supporting part and is used for connecting the inside of the supporting part with the anti-floating structure on the same central axis.

[0011] Preferably, a groove for arranging the anti-floating structure is arranged in the center of the flow equalizing top cover, and a part of the anti-floating structure is arranged in the groove and another part of the anti-floating structure is arranged in the second layer.

[0012] Preferably, when the number of the anti-floating structures is greater than or equal to two, a support is arranged between the two anti-floating structures.

[0013] Preferably, the support is a honeycomb-shaped porous brick.

[0014] Preferably, seven anti-floating structures are arranged between the second layer and the flow equalizing top cover.

[0015] Preferably, the seven anti-floating structures are arranged in a mode that one anti-floating structure is arranged in the center and the other six anti-floating structures are arranged around the one anti-floating structure.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] The anti-floating heat accumulating body provided by the application can significantly reduce the airflow speed in a key area, thereby reducing the floating force on the heat accumulating body and avoiding the floating problem of the heat accumulating body.

[0018] The anti-floating heat accumulating body provided by the application can be embedded with the anti-floating structure, the flow equalizing top cover and the first layer, and a porous brick is arranged between the two anti-floating structures, so that the structure of the heat accumulating assembly is stable, and the stability of the heat accumulating body in the working process is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The features and advantages of the application will be more clearly understood through the following detailed description with reference to the drawings, which are schematic and should not be considered as limiting the application, and in the drawings:

[0020] Figure 1 Fig. 1 is a structural schematic view of a heat accumulating body in the prior art;

[0021] Figure 2This is a structural schematic diagram of a preferred embodiment of the present invention for an anti-floating heat storage body;

[0022] Figure 3 This is a top view of an anti-floating structure in an anti-floating heat storage body according to a preferred embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of an anti-floating structure in an anti-floating heat storage body according to a preferred embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of another anti-floating heat storage body disclosed in a preferred embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of another anti-floating heat storage body disclosed in a preferred embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Throat; 2. Flow equalization top cover; 3. Second layer; 4. Third layer; 5. Bottom layer; 6. Anti-floating structure; 7. Support components. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In the prior art, the heat storage body (equivalent to the heat storage component in this application) is as follows: Figure 1 As shown, it is composed of multiple honeycomb hollow bricks, including a top cover 2, a second layer 3, a third layer 4, and a bottom layer 5.

[0031] An anti-floating heat storage body for a heat storage air heater, such as Figure 2 andFigures 3-4 As shown in the drawings, it comprises: a throat 1, and a heat storage assembly arranged in the throat 1, the heat storage assembly is composed of a flow uniformity top cover 2 and at least two layers of honeycomb-shaped porous bricks, and at least one anti-floating structure 6 with the same size and thickness as the honeycomb-shaped porous bricks is arranged in the heat storage assembly; the anti-floating structure 6 is a regular hexagon in cross section, and circular grooves are arranged on the upper and lower surfaces of the anti-floating structure 6, and airflow through holes are uniformly arranged in the circular grooves. The size and thickness of the anti-floating structure 6 are the same as those of the honeycomb-shaped porous bricks constituting the heat storage assembly, so that the anti-floating structure 6 can be closely connected with the remaining honeycomb-shaped porous bricks, thereby ensuring the uniformity of airflow passing through the heat storage assembly.

[0032] In some specific embodiments, as shown in Figure 3 and Figure 4 , the anti-floating structure 6 has seven airflow through holes.

[0033] In some specific embodiments, as shown in Figure 2 , the throat 1 is composed of a supporting part and a pipeline part, the supporting part is cylindrical and is used for bearing the heat storage assembly, and the pipeline part is arranged in the center of the supporting part and is used for connecting the inside of the supporting part and the anti-floating structure 6 located on the same central axis.

[0034] In some specific embodiments, as shown in Figure 2 , 5 -6, a groove for placing the anti-floating structure 6 is arranged in the center below the flow uniformity top cover 2, and the anti-floating structure 6 is partially located in the groove and partially located in the second layer 3. With such a design, the anti-floating structure 6 can be embedded with the flow uniformity top cover 2 and the second layer 3, thereby improving the firmness of the heat storage body as a whole and preventing the heat storage body from vibrating and loosening due to excessive airflow.

[0035] In some specific embodiments, as shown in Figure 5 , when the number of the anti-floating structures 6 is greater than or equal to two, a support 7 is arranged between the two adjacent anti-floating structures 6. In some specific embodiments, the support 7 is a honeycomb-shaped porous brick. The support 7 is the same as the remaining honeycomb-shaped porous bricks constituting the heat storage assembly, and not only plays a role of supporting the anti-floating structure 6, but also forms intervals with the airflow through holes on the anti-floating structure 6, thereby reducing the airflow speed.

[0036] In some specific embodiments, as shown in Figure 6 , seven anti-floating structures 6 are arranged in parallel between the second layer 3 and the flow uniformity top cover 2, and the seven anti-floating structures 6 are arranged in a mode of one in the center and the remaining six surrounding the one. This further reduces the airflow speed and uniformly distributes the airflow, thereby avoiding the floating problem of the heat storage assembly caused by excessive airflow speed.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Various technical features are described in this detailed description. Many of the technical features described can be combined in any combination. Descriptions of features in the following description that can be combined will be brought to mind by phrases such as "can be combined," "can be included," "can be associated," "can be employed," "can be used," and the like.

Claims

1. A floating-preventing heat accumulator for a regenerative air heater, characterized by The application relates to a throat and a heat storage assembly arranged in the throat, wherein the heat storage assembly is composed of a flow-uniform top cover and at least two layers of honeycomb-shaped porous bricks, at least one anti-floating structure with the same size and thickness as the honeycomb-shaped porous bricks is arranged in the heat storage assembly; the anti-floating structure is a regular hexagon in cross section, circular grooves are arranged on the upper and lower surfaces of the anti-floating structure, and airflow through holes are uniformly arranged in the circular grooves. The throat is composed of a supporting part and a pipeline part, the supporting part is cylindrical, the inside of the supporting part is used for bearing the heat storage assembly, the pipeline part is arranged in the center of the supporting part and is used for connecting the inside of the supporting part and the anti-floating structure on the same central axis.

2. The anti-floating heat accumulator for a regenerative air heater according to claim 1, characterized by A groove for placing the anti-floating structure is arranged in the center below the flow-uniform top cover, one part of the anti-floating structure is located in the groove, and the other part is located in the second layer.

3. The anti-floating heat accumulator for a regenerative air heater according to claim 1 or 2, characterized in that, When the anti-floating structures are greater than or equal to two, a support is arranged between the two anti-floating structures.

4. The anti-floating heat accumulator for a regenerative air heater according to claim 3, characterized by The support is a honeycomb-shaped porous brick.

5. The anti-floating heat accumulator for a regenerative air heater according to claim 4, characterized by Seven anti-floating structures are arranged between the second layer and the flow-uniform top cover in parallel.

6. The anti-floating heat accumulator for a regenerative air heater according to claim 4, characterized by The parallel arrangement mode of the anti-floating structures is that one is arranged in the center and the other six are arranged around the center.

7. The anti-floating heat accumulator for a regenerative air heater according to claim 6, characterized by ​

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