High-temperature exhaust valve water cooling structure based on 3D printing technology

Abstract

The utility model relates to a high-temperature exhaust valve water-cooling structure based on a 3D printing process. The high-temperature exhaust valve water-cooling structure comprises a flange ring; the interior of the flange ring is connected with the valve element through a plurality of connecting parts; the side wall water-cooling spacer bush is arranged in the annular side wall of the valve element; the annular cooling channel is arranged in the center of the windward side of the valve element; the annular cooling channel is communicated with the side wall water-cooling spacer bush through a plurality of water-cooling channels; the first end of the end part of the flow guide pipe in the valve core is communicated with the annular cooling channel through a plurality of connecting holes; valve element cooling water is gathered to the head of the valve element through the valve element middle flow guide pipe, when the cooling water passes through the joint of the annular cold air channel and the water cooling channel, the flow area is reduced, the flow speed of the cooling water is increased, the impact cooling effect of the cooling water is enhanced, and the windward side of the valve element is cooled.

Description

Technical Field

[0001] The utility model relates to the field of high-temperature exhaust valves, in particular to a high-temperature exhaust valve water cooling structure based on a 3D printing process. Background Art

[0002] A gas turbine is a thermal impeller machine that rotates at high temperature, high pressure and high speed. Its internal aerodynamics, thermal dynamics, and fluid-thermal-chemical-solid coupling are complex, and understanding its internal characteristics depends on long-term experiments and data accumulation. The combustion chamber is a key component of the gas turbine and is the scientific and technological infrastructure for conducting research on scientific and technological issues, applications and development of gas turbines, and for carrying out innovative activities.

[0003] The high-temperature exhaust valve uses the principle of throttling back pressure to increase the combustion chamber pressure in order to carry out high-pressure or even full pressure differential test research in the combustion chamber. The operating conditions of the combustion chamber are as high as 2000K. At such a high temperature, to ensure the safety and reliability of the valve, the high-temperature area must be fully cooled; the high-temperature exhaust valve is specially designed, and the cooling water flow channel structure is complex. It is difficult to achieve normal processing with traditional processing and manufacturing processes, combined with additive manufacturing processes.

[0004] like Figure 1 FIG. 1 is a schematic diagram of the structure of the windward surface of a conventional high-temperature exhaust valve. The windward surface of the valve core is provided with a plurality of ribs 20 to form a fan-shaped cooling area, and the cooling area is connected to the side wall water-cooling spacer. Thus, when the cooling water enters the cooling area, its cross-section gradually increases, resulting in a decrease in the flow rate of the cooling water, an insignificant impact cooling effect, and an insignificant cooling of the windward surface.

[0005] In summary, how to cool the valve in the high-temperature concentrated area on the windward side of the valve core and the high-temperature medium direct impact surface to prevent the valve from being damaged due to high-temperature failure in the high-temperature concentrated area. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to realize cooling of the valve in the high temperature concentrated area on the windward side of the valve core and the high temperature medium direct impact side;

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] The utility model discloses a water-cooling structure for a high-temperature exhaust valve based on a 3D printing process, comprising: a flange ring; a valve core, wherein the flange ring is connected to the valve core through a plurality of connecting parts; a side wall water-cooling spacer, which is arranged in the annular side wall of the valve core; an annular cooling channel, which is arranged at the center of the windward surface of the valve core; the annular cooling channel is connected to the side wall water-cooling spacer through a plurality of water-cooling channels; the first end of the end of the guide pipe in the valve core is connected to the annular cooling channel through a plurality of connecting holes;

[0009] In this scheme, the high-temperature exhaust valve is printed using 3D technology; the cooling water passes through the guide pipe, the annular cooling channel, the water cooling channel, and the side wall water cooling sleeve in sequence;

[0010] The valve core cooling water is collected to the valve core head through the valve core middle guide pipe. When the cooling water passes through the connection of the annular cold air channel and the water cooling channel, the flow area is reduced, which increases the cooling water flow rate, enhances the impact cooling effect of the cooling water, and realizes the cooling of the windward side of the valve core.

[0011] In order to illustrate the specific structure of the water cooling channel, the utility model adopts a plurality of said water cooling channels as an arc structure;

[0012] The arc-shaped cooling channel extends the length of the cooling channel and increases the heat exchange time between cooling water and steam.

[0013] In order to illustrate how the first end is connected to the annular cooling channel, the utility model adopts a conical structure of the first end; a plurality of straight connecting pipes are arranged at the center of the first end to be connected to the annular cooling channel; the angles of two adjacent straight connecting pipes are the same; a plurality of curved connecting pipes are arranged at the inclined surface of the first end to be connected to the annular cooling channel;

[0014] In this solution, the center of the first end is in the same plane as the annular cooling channel, and therefore is connected to the annular cooling channel through a straight connecting pipe. The inclined surface of the first end is not in the same plane as the annular cooling channel, and therefore is connected to the annular cooling channel through a bent connecting pipe. In this way, when the cooling water passes through the first end, it is connected to the annular cooling channel through the straight connecting pipe and the bent connecting pipe. In this process, the flow area is smaller and the flow rate of the cooling water is increased.

[0015] The corner of the windward side of the valve core is affected by the high temperature zone, resulting in a high temperature of the valve core wall in the high temperature zone. In order to reduce the temperature of the valve core wall in the high temperature zone, the utility model adopts a gap of 1mm at the corner where the water cooling channel and the side wall water cooling spacer are connected;

[0016] At the corner of the windward side of the valve core, a 1mm gap is formed by the outer wall of the valve core and the internal support, which increases the cooling water flow rate, impacts the high-temperature area at the corner, and reduces the temperature of the valve core wall in the high-temperature area.

[0017] In order to illustrate the specific structure of the water cooling channel, the utility model adopts each of the water cooling channels to include: a main flow channel, one end of which is connected to the annular cooling channel; two branch flow channels, one end of which is connected to the main flow channel and the other end is connected to the side wall water cooling spacer; wherein the cross-sectional area of ​​the branch flow channel is smaller than the cross-sectional area of ​​the main flow channel;

[0018] The cooling water first passes through the main flow channel and then through the branch channel, so that it can cover the windward side of the valve core. In addition, when the cooling water passes through the branch channel, the flow rate increases due to the smaller cross-sectional area, thereby cooling the windward side of the valve core.

[0019] The beneficial effects of the utility model are as follows: the utility model is a high-temperature exhaust valve water-cooling structure based on the 3D printing process. The valve core cooling water is collected to the valve core head through the valve core middle guide pipe. When the cooling water passes through the connection between the annular cold air channel and the water cooling channel, the flow area is reduced, the cooling water flow rate is increased, the impact cooling effect of the cooling water is enhanced, and the cooling of the windward surface of the valve core is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of a traditional high-temperature exhaust valve;

[0022] Figure 2 It is a structural schematic diagram of the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 It is a transparent picture of the windward side of the valve core;

[0025] In the figure: 1-flange ring, 2-valve core, 3-connecting part, 4-side wall water-cooling spacer, 5-windward surface, 6-annular cooling channel, 7-water cooling channel, 8-flow guide pipe, 9-first end, 10-connecting hole, 11-straight connecting pipe, 12-bend connecting pipe, 20-rib, 71-main flow channel, 72-dividing flow channel. DETAILED DESCRIPTION

[0026] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0027] like Figure 2-4 As shown, the utility model is a high-temperature exhaust valve water cooling structure based on 3D printing technology, comprising: a flange ring 1; a valve core 2, wherein the flange ring 1 is connected to the valve core 2 through a plurality of connecting parts 3; a side wall water cooling spacer 4, which is arranged in the annular side wall of the valve core 2; an annular cooling channel 6, which is arranged at the center of the windward surface 5 of the valve core 3; the annular cooling channel 6 is connected to the side wall water cooling spacer 4 through a plurality of water cooling channels 7; the first end 9 of the end of the guide pipe 8 in the valve core 2 is connected to the annular cooling channel 6 through a plurality of connecting holes 10;

[0028] In this scheme, the high-temperature exhaust valve is printed using 3D technology; the cooling water passes through the guide pipe, the annular cooling channel, the water cooling channel, and the side wall water cooling sleeve in sequence;

[0029] The valve core cooling water is collected to the valve core head through the valve core middle guide pipe. When the cooling water passes through the connection of the annular cold air channel and the water cooling channel, the flow area is reduced, which increases the cooling water flow rate, enhances the impact cooling effect of the cooling water, and realizes the cooling of the windward side of the valve core.

[0030] like Figure 2-4 As shown, in order to illustrate the specific structure of the water cooling channel, the utility model adopts a plurality of water cooling channels 7 as an arc structure;

[0031] The arc-shaped cooling channel extends the length of the cooling channel and increases the heat exchange time between cooling water and steam.

[0032] like Figure 2-4 As shown, in order to illustrate how the first end is connected to the annular cooling channel, the utility model adopts the first end 9 as a conical structure; a plurality of straight connecting pipes 11 are arranged at the center of the first end 9 to communicate with the annular cooling channel 6; the angles of two adjacent straight connecting pipes 11 are the same; a plurality of curved connecting pipes 12 are arranged at the inclined surface of the first end 9 to communicate with the annular cooling channel 6;

[0033] In this solution, the center of the first end is in the same plane as the annular cooling channel, and therefore is connected to the annular cooling channel through a straight connecting pipe. The inclined surface of the first end is not in the same plane as the annular cooling channel, and therefore is connected to the annular cooling channel through a bent connecting pipe. In this way, when the cooling water passes through the first end, it is connected to the annular cooling channel through the straight connecting pipe and the bent connecting pipe. In this process, the flow area is smaller and the flow rate of the cooling water is increased.

[0034] like Figure 2-4 As shown, the corner of the windward side of the valve core is affected by the high temperature zone, resulting in a high temperature of the valve core wall in the high temperature zone. In order to reduce the temperature of the valve core wall in the high temperature zone, the utility model adopts a gap of 1 mm at the corner where the water cooling channel 7 and the side wall water cooling spacer 4 are connected;

[0035] At the corner of the windward side of the valve core, a 1mm gap is formed by the outer wall of the valve core and the internal support, which increases the cooling water flow rate, impacts the high-temperature area at the corner, and reduces the temperature of the valve core wall in the high-temperature area.

[0036] like Figure 4As shown, in order to illustrate the specific structure of the water cooling channel, the utility model adopts each of the water cooling channels 7 to include: a main flow channel 71, one end of which is connected to the annular cooling channel 6; two branch flow channels 72, one end of which is connected to the main flow channel 71, and the other end is connected to the side wall water cooling spacer 4; wherein the cross-sectional area of ​​the branch flow channel 72 is smaller than the cross-sectional area of ​​the main flow channel 71;

[0037] The cooling water first passes through the main flow channel and then through the branch channel, so that it can cover the windward side of the valve core. In addition, when the cooling water passes through the branch channel, the flow rate increases due to the smaller cross-sectional area, thereby cooling the windward side of the valve core.

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-temperature exhaust valve water cooling structure based on 3D printing technology, characterized in that: include: Flange ring; A valve core, wherein the flange ring is connected to the valve core via a plurality of connecting parts; A side wall water-cooling spacer, which is arranged inside the annular side wall of the valve core; An annular cooling channel, which is arranged at the center of the windward surface of the valve core; The annular cooling channel is connected to the side wall water cooling spacer through a plurality of water cooling channels; The first end of the guide tube end portion in the valve core is communicated with the annular cooling channel through a plurality of connecting holes.

2. According to the water cooling structure of a high-temperature exhaust valve based on 3D printing process according to claim 1, it is characterized in that: The plurality of water cooling channels are arc-shaped structures.

3. According to the water cooling structure of a high-temperature exhaust valve based on 3D printing process according to claim 1, it is characterized in that: The first end is a tapered structure; A plurality of straight connecting pipes are arranged at the center of the first end and communicated with the annular cooling channel; The angles of two adjacent straight connection pipes are the same.

4. The high-temperature exhaust valve water cooling structure based on 3D printing process according to claim 3 is characterized in that: A plurality of curved connecting pipes are arranged on the inclined surface of the first end and are connected to the annular cooling channel.

5. The high-temperature exhaust valve water cooling structure based on 3D printing process according to claim 1 is characterized in that: The gap at the corner where the water-cooling channel is connected to the side wall water-cooling spacer is 1 mm.

6. The high-temperature exhaust valve water cooling structure based on 3D printing process according to claim 1 is characterized in that: Each of the water cooling channels comprises: a main flow channel, one end of which is connected to the annular cooling channel; Two branch flow channels, one end of each of which is connected to the main flow channel, and the other end of each of which is connected to the side wall water cooling spacer; Wherein, the cross-sectional area of ​​the branch flow channel is smaller than the cross-sectional area of ​​the main flow channel.

Images