CN216716301U - Hook and heat insulation structure - Google Patents

Abstract

The utility model discloses a hook and a heat insulation structure in the technical field of heat insulation tile fixing, comprising: the fixing part is used for being connected with the combustion chamber cylinder body; the clamping part is connected to one end of the fixing part and is used for being connected with the heat insulation tile and fixing the heat insulation tile; a heat insulating portion for insulating the holding portion from the hot gas; the heat insulation part is arranged on one side, away from the fixing part, of the clamping part, a cooling gap is formed between the heat insulation part and the clamping part, and the cooling gap is used for cooling the clamping part and the heat insulation part. According to the utility model, the separation of the mechanical stress concentration area and the thermal stress area of the hook is realized through the barrier effect of the heat insulation part on the hot gas, and the ablation effect of the hot gas on the clamping part is reduced; the clamping part and the heat insulation part are cooled by the cooling gas flowing into the cooling gap, so that the ablation effect of heat transfer between the heat insulation part and the clamping part on the clamping part can be reduced, and the service life of the hook is further prolonged.

Description

Hook and heat insulation structure

Technical Field

The utility model relates to the technical field of heat insulation tile fixing, in particular to a hook and a heat insulation structure.

Background

The interior of the annular combustion chamber of an industrial heavy duty class F gas turbine is typically protected by ceramic heat shield tiles to protect the metal block. In order to fix the ceramic heat insulation tile on the metal cylinder wall of the combustion chamber, a hook made of high-temperature nickel-based alloy is needed to fix the heat insulation tile on the combustion chamber cylinder body. Because the hook works in a high-temperature environment, cooling air is needed to cool the hook so as to weaken or eliminate the influence of high temperature on the hook fixing heat-insulating tile.

As shown in fig. 4, 5 and 6, the conventional hanger 100 includes a fixing portion 110 and a clamping portion 120, the clamping portion 120 is connected to one end of the fixing portion 110, the other end of the fixing portion 110 is provided with a locking pin hole 150, the fixing portion 110 is slid into a sliding groove of the combustion chamber cylinder 300, and the fixing portion 110 is fixedly connected to the combustion chamber cylinder 300 by a positioning pin 400. The clamping portion 120 includes a clamping section 121, a first connecting section 122, a bending section 123 and a second connecting section 124 connected in sequence, and the second connecting section 124 is connected between the bending section 123 and the fixing portion 110. When the heat insulating tile 200 is fixed using the hook 100, the clamping section 121 is clamped in the side hook groove 210 of the heat insulating tile 200, and the heat insulating tile 200 is "clamped" to the combustion chamber cylinder 300 by the mechanical deformation of the first connecting section 122; the side hook grooves 210 of two adjacent insulation tiles 200 form a gas chamber 220, the combustion chamber cylinder 300 is provided with a cooling gas passage 310, and cooling gas flows into the gas chamber 220 from the cooling gas passage 310 for cooling the hook 100.

In the unit operation process, along with two adjacent ceramic tile piece corners under the high-speed hot gas scouring of high temperature, because of reasons such as oxidation and wearing and tearing, the clearance between the thermal-insulated tile piece can grow gradually, the couple is bent a section upper surface and can be exposed in the erosion of hot gas gradually, and current cooling gas flows can not carry out effectual cooling to the bending section top. The hook bending section bears mechanical stress and thermal stress simultaneously, and ablation is frequent gradually. Ablation of the clamping portion 120 can result in failure of the attachment of the hanger 100 to the insulation tile 200, which in turn can result in the removal of the insulation tile 200. As the performance parameters of the gas turbine are improved, the turbine inlet temperature is higher and higher, and the ablation failure of the hook 100 for fixing the heat insulation tile 200 is more and more frequent. However, in order to improve the efficiency of the engine, the cooling air for cooling the hanger 100 needs to be designed in a decreasing direction.

Patent document CN1818527B discloses a heat shield, which comprises a fixing section and a fixing member head, wherein the fixing section is provided with a through hole for cooling the fixing member head by cooling fluid; by improving the cooling effect of the inner side surface of the head of the fixing part, the ablation of the heat shield is reduced. Patent document CN107208892B discloses a support member for a thermal insulating tile for a gas turbine combustion chamber, which comprises an elongated plate and a bonding head, the outer surface of which is coated with a protective coating. The thermal insulation function of the protective coating reduces the burning of the hot gas to the joint, thereby prolonging the service life of the support component.

However, the two modes can not avoid the ablation phenomenon of the clamping part of the hook, and the service life of the hook is improved in a limited way.

Disclosure of Invention

The specific analysis of the reasons for the clamping part failure is two: firstly, the hook applies pretightening force to lock the heat insulation tile through the mechanical deformation of the clamping section, and the stress of the hook is concentrated on the first connecting section; the ablation effect of the hot combustion gas on the first connecting section enables the temperature of the first connecting section to rise until the first connecting section deforms, so that the pretightening force of the clamping section on the heat insulation tile is reduced, and the fixing of the hook on the heat insulation tile is disabled; or the first connecting section is broken under the dual actions of thermal stress and mechanical stress along with the increase of the temperature of the first connecting section, thereby causing the fixing failure of the heat insulation tile by the hook. Secondly, the ablation effect of the hot gas enables the clamping part to be slowly burnt from the clamp section to the first connecting section, and further the fixing failure of the heat insulation tile by the hook is caused.

In view of the above, the present invention provides a hook to solve the technical problem of the conventional hook failure due to ablation.

The technical scheme adopted by the utility model is as follows: a hanger for securing a heat shield tile to a combustion chamber cylinder, comprising:

the fixing part is used for being connected with the combustion chamber cylinder body;

the clamping part is connected to one end of the fixing part and used for being connected with the heat insulation tile and fixing the heat insulation tile;

an insulating portion for insulating the clamping portion from hot combustion gas;

the heat insulation part is arranged on one side, deviating from the fixing part, of the clamping part, a cooling gap is formed between the heat insulation part and the clamping part, and the cooling gap is used for introducing cooling gas and cooling the clamping part and the heat insulation part.

Preferably, the heat insulation part is provided with a communication hole for communicating the cooling gap with a gas chamber formed by the side hook grooves of two adjacent heat insulation tiles, so that cooling gas flows through the cooling gap and enters the gas chamber.

Preferably, the clamping part comprises a clamping section, a first connecting section, a bending section and a second connecting section, and the clamping section is used for clamping in a side hook groove of the heat insulation tile and radially fixing the heat insulation tile; the first connecting section is connected between the clamping section and the bending section; the bending section is used for being abutted against the end part of the heat insulation tile and axially limiting the heat insulation tile; the second connecting section is connected between the bending section and the fixing part;

the heat insulation part comprises a heat insulation elastic sheet, one end of the heat insulation elastic sheet is fixedly connected with the clamp section, the other end of the heat insulation elastic sheet can generate elastic deformation under the action of external force and is close to the bending section, and the cooling gap is formed between the heat insulation elastic sheet and the clamping part.

Preferably, the communicating hole is formed in one end, close to the clamp section, of the heat insulation elastic sheet.

Preferably, the communicating holes are linearly and uniformly distributed on the heat insulation elastic sheet along the width direction of the heat insulation elastic sheet, so that a cold air wall is formed between the clamp section and the hot gas.

Preferably, thermal-insulated shell fragment includes thermal-insulated section and deformation section, the one end of thermal-insulated section with the clamp section is connected, the deformation section set up in the bending segment deviates from one side of fixed part, adjacent two can separate after the deformation section butt of thermal-insulated shell fragment is out of shape hot gas with cooling gas.

Preferably, the communication hole is any one of a circular hole, an elliptical hole or a square hole;

the air outlet direction of the communicating hole is vertical to the outer surface of the heat insulation elastic sheet; or

The air outlet direction of the communicating hole faces the bottom of the side hook groove of the heat insulation tile.

Preferably, the heat insulation elastic sheet and the clamp section are integrally formed; or

One end of the heat insulation elastic sheet is fixedly connected with the clamp section in a welding mode.

Preferably, the cross-sectional area of the cooling gap is gradually narrowed in the flow direction of the cooling gas.

Another object of the present invention is to provide a heat insulation structure, which includes the above hook, and further includes two hooks and two heat insulation tiles; the fixing part of the hook is arranged in a sliding groove on the combustion chamber cylinder body, and the clamping parts of the hook clamp the side hook grooves of the heat insulation tile in a one-to-one correspondence manner; the heat insulation parts of the two hooks are connected in an abutting mode, and the cooling gaps of the two hooks are communicated with air chambers formed by the side hook grooves of the two adjacent heat insulation tiles through communication holes.

The utility model has the beneficial effects that:

1. the heat insulation part is arranged on the outer side of the clamping part of the hook, and the heat insulation part separates heat combustion gas from the clamping part through the separation effect of the heat insulation part on the heat combustion gas, so that the separation of a mechanical stress concentration area and a heat stress area of the hook is realized, and the ablation effect of the heat combustion gas on the clamping part is reduced; according to the utility model, the cooling gap is formed between the heat insulation part and the clamping part, and the clamping part and the heat insulation part are cooled by the cooling gas flowing into the cooling gap, so that the ablation effect of heat transfer between the heat insulation part and the clamping part on the clamping part can be reduced, the ablation effect of hot gas on the heat insulation part can be reduced, and the service life of the hook is further prolonged.

2. The communicating hole is arranged on the heat insulation part, and the cooling gas flowing in from the cooling gas through hole of the combustion chamber cylinder body flows into the gas chamber through the cooling gap by the communicating action of the communicating hole on the cooling gap and the gas chamber, so that the outer surface of the clamping part and the inner surface of the heat insulation part are cooled, and the ablation action of hot gas on the clamping part and the heat insulation part can be greatly reduced.

3. The heat insulation part comprises heat insulation elastic sheets, after the hooks are hooked on the side hook grooves of the heat insulation tile, the heat insulation elastic sheets of two adjacent hooks are in elastic butt joint and used for plugging a communication channel between hot gas and cooling gas, so that the cooling gas flows into the gas chamber through a cooling gap between the clamping part and the heat insulation part, the cooling effect of the cooling gas on the clamping part and the heat insulation part is improved, and the cooling gas is utilized to the maximum extent.

4. The utility model arranges a plurality of through holes linearly at one end of the heat insulation part connected with the brake, so that the cooling gas flowing out from the through holes can form a gas wall between the clamping part and the hot gas, and the ablation effect of the hot gas on the clamping part is further reduced through the separation effect of the gas wall on the clamping part and the hot gas.

Drawings

FIG. 1 is a schematic view of the hook structure of the present invention;

FIG. 2 is a front view of the hanger of the present invention;

FIG. 3 is a schematic structural view of the thermal insulation structure of the present invention;

FIG. 4 is a schematic structural view of a conventional hook;

FIG. 5 is a schematic view of a prior art hook coupled to a heat shield tile;

fig. 6 is a schematic structural view of a conventional heat insulation structure.

The reference numbers in the figures illustrate:

100. hooking;

110. a fixed part;

120. a clamping portion;

121. a clamping section;

122. a first connection section;

123. bending the section;

124. a second connection section;

130. a heat insulating part;

131. a heat insulation spring sheet;

132. a communicating hole;

133. a heat insulation section;

134. a deformation section;

140. cooling the gap;

150. locking pin holes;

200. a heat insulation tile;

210. a side hook groove;

220. an air chamber;

300. a combustion chamber cylinder;

310. a cooling gas channel;

400. and a positioning pin.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example, as shown in fig. 1 to 3, a hanger 100 for fixedly attaching an insulation tile 200 to a combustion chamber cylinder 300; the hanger 100 includes:

a fixing part 110, the fixing part 110 being used to connect with the combustion chamber cylinder 300;

a clamping part 120, the clamping part 120 being connected to one end of the fixing part 110 for connecting with the heat insulation tile 200 and clamping and fixing the heat insulation tile 200;

a heat insulation portion 130, wherein the heat insulation portion 130 is disposed on a side of the clamping portion 120 away from the fixing portion 110, and is used for insulating the clamping portion 120 from the hot gas; a cooling gap 140 is formed between the heat insulating part 130 and the clamping part 120, and the cooling gap 140 is used for introducing cooling gas and cooling the clamping part 120 and the heat insulating part 130. Note that, in fig. 3 and 6, the central chain line arrow indicates the hot gas flow direction; the dashed arrows indicate the cooling gas flow direction.

The heat insulation part 130 is arranged on the outer side of the clamping part 120 of the hook 100, and the heat insulation part 130 separates heat gas from the clamping part 120 under the barrier effect on the heat gas, so that the separation of a mechanical stress concentration area and a heat stress area of the hook 100 is realized, and the ablation effect of the heat gas on the clamping part 120 is reduced; in the present invention, the cooling gap 140 is formed between the heat insulating portion 130 and the clamping portion 120, and the clamping portion 120 and the heat insulating portion 130 are cooled by the cooling gas flowing into the cooling gap 140, so that the ablation effect of the heat transfer between the heat insulating portion 130 and the clamping portion 120 on the clamping portion 120 can be reduced, the ablation effect of the hot gas on the heat insulating portion 130 can also be reduced, and the service life of the hook 100 can be further prolonged.

In a specific embodiment, as shown in fig. 1, at least one communication hole 132 is provided on the heat insulation portion 130, and the communication hole 132 is used for communicating the cooling gap 140 with the air chamber 220 formed by the side hook grooves 210 of two adjacent heat insulation tiles 200, so that at least part of the cooling air flows through the cooling gap 140 and enters the air chamber 220, thereby cooling the outer side surface of the clamping portion 120. With this arrangement, the communication hole 132 is provided in the heat insulating part 130, and the cooling gap 140 is communicated with the air chamber 220 between two adjacent heat insulating tiles 200 through the communication hole 132, so that the cooling gas entering the chute of the combustion chamber cylinder 300 from the cooling gas channel 310 on the combustion chamber cylinder 300 at least partially flows through the cooling gap 140 and the communication hole 132 and enters the air chamber 220, and when the cooling gas flows through the cooling gap 140, the outer side surface of the clamping part 120 and the inner side surface of the heat insulating part 130 can be simultaneously cooled, thereby reducing the ablation of the hot gas on the clamping part 120, prolonging the service life of the hanger 100, and ensuring the fixing effect of the hanger 100 on the heat insulating tiles 200.

In a specific embodiment, as shown in fig. 2, the clamping portion 120 comprises a clamping section 121, a first connecting section 122, a bending section 123 and a second connecting section 124, wherein the clamping section 121 is used for clamping in the side hook groove 210 of the heat insulation tile 200 and clamping and fixing the heat insulation tile 200 in a radial direction, wherein the radial direction is in a radial direction of the annular combustion chamber; the first connecting section 122 is connected between the clamping section 121 and the bending section 123; the bending section 123 is used for abutting against the end part of the heat insulation tile 200 and performing axial limiting braking on the heat insulation tile 200, wherein the axial direction of the bending section is in the axial direction of the annular combustion chamber; the second connecting section 124 is connected between the bending section 123 and the fixing section 110. The heat insulation portion 130 includes a heat insulation elastic sheet 131, the heat insulation elastic sheet 131 is disposed outside the clamping section 121, the first connecting section 122 and the bending section 123 of the clamping portion 120, one end of the heat insulation elastic sheet 131 is fixedly connected to the clamping section 121, the other end of the heat insulation elastic sheet 131 can elastically deform under the action of an external force and is close to the bending section 123, and a cooling gap 140 is formed between the heat insulation elastic sheet 131 and the clamping section 121, the first connecting section 122 and the bending section 123 of the clamping portion 120. So set up, set heat insulating part 130 to thermal-insulated shell fragment 131, both can form cooling gap 140 between thermal-insulated shell fragment 131 at clamping part 120, can fix insulating tile 200 at couple 100 again, through the squeezing action between the thermal-insulated shell fragment 131 of two adjacent couples 100, make thermal-insulated shell fragment 131 take place elastic deformation, make between two thermal-insulated shell fragments 131 in close contact with, and then shutoff hot gas and the intercommunication passageway between the cooling gas, make the cooling gas that flows in by combustion chamber cylinder 300 all pass through the cooling gap 140 between clamping part 120 and heat insulating part 130 and flow into air chamber 220, thereby improve the cooling effect of cooling gas to clamping part 120 and heat insulating part 130, realize the maximum utilization of cooling gas, reduce the waste of cooling gas, realize the reduction of cooling gas quantity.

In one embodiment, as shown in fig. 1 and 3, the communication hole 132 is disposed at an end of the thermal insulating elastic sheet 131 close to the clamping section 121. With such an arrangement, the communication hole 132 is formed at one end of the heat insulation elastic sheet 131 close to the clamp section 121, so that the flow path and the flow duration of the cooling gas in the cooling gap 140 can be prolonged to the greatest extent, and the cooling effect of the cooling gas on the clamping portion 120 and the heat insulation elastic sheet 131 can be further improved; meanwhile, the communication hole 132 is formed at one end of the heat insulation elastic sheet 131 close to the clamp section 121, so that the distance between the cooling gas and the hot gas flowing through the communication hole 132 and entering the gas chamber can be increased, the influence of the cooling gas on the hot gas inside the heat insulation tile 200 is reduced, and the efficiency of the combustion engine is improved.

In one embodiment, as shown in fig. 1 and 3, the plurality of communication holes 132 are linearly and uniformly distributed on the heat insulation elastic sheet 131 along the width direction of the heat insulation elastic sheet 131, so that a cold air wall is formed between the clamp segment 121 and the hot gas. With such an arrangement, the plurality of communication holes 132 are linearly arranged at one end of the thermal insulation elastic sheet 131 connected to the clamp section 121 along the width direction of the thermal insulation elastic sheet 131, so that after the cooling gas in the cooling gap 140 flows into the air chamber 220 through the communication holes 132, a discontinuous gas wall is formed between the clamp section 121 of the clamping portion 120 and the hot gas in the air chamber 220, and the gas wall has a separation effect on the clamp section 121 of the clamping portion 120 and the hot gas in the air chamber 220, and is used for blocking the hot gas from moving towards the clamp section 121 of the clamping portion 120, thereby reducing the ablation effect of the hot gas on the clamp section 121 of the clamping portion 120, realizing the cooling protection of the whole clamping portion 120, and effectively prolonging the service life of the hook 100.

In an embodiment, as shown in fig. 2, the heat insulation elastic sheet 131 includes a heat insulation section 133 and a deformation section 134, the heat insulation section 133 is disposed outside the clamping section 121 and the first connecting section 122 of the clamping portion 120, and one end of the heat insulation section 133 is fixedly connected to the clamping section 121; the deformation section 134 is disposed outside the bending section 123 and connected to the other end of the heat insulation section 133, that is, the deformation section 134 is disposed on a side of the bending section 123 away from the fixing portion 110; after the heat insulation tile 200 is fixedly connected to the combustion chamber cylinder 300 by the hook 100, the deformation sections 134 of the heat insulation elastic pieces 131 of two adjacent hooks are mutually extruded and deformed and are tightly abutted, so that the hot gas and the cooling gas are separated, the direct contact between the cooling gas and the hot gas is avoided, the amount of the cooling gas is reduced, the cooling gas can completely flow into a cooling gap, the drainage and the guidance of the cooling gas are realized, and the clamping part 120 and the heat insulation part 130 are cooled.

In one embodiment, as shown in fig. 1, the communication hole 132 may be any one of a circular hole, an elliptical hole, or a square hole; and the air outlet direction of the communication hole 132 is perpendicular to the outer surface of the heat insulation elastic sheet 131, or the air outlet direction of the communication hole 132 faces the groove bottom of the side hook groove 210 of the heat insulation tile 200. With such an arrangement, the air wall formed by the cooling gas flowing into the air chamber 220 from the communication hole 132 can better separate the clamp segment 121 of the clamping portion 120 from the hot gas by arranging the air outlet direction of the communication hole 132.

In one embodiment, as shown in fig. 1, the heat insulation elastic sheet 131 and the clamp section 121 may be integrally formed by an additive manufacturing method; or one end of the heat insulation elastic sheet 131 is fixedly connected with the clamp section 121 in a welding manner; the method comprises the following specific steps: the hook 100 can be formed by rolling a sheet metal part, and the heat insulation elastic sheet 131 can be formed by a suitable welding process, such as: the heat insulating elastic sheet 131 and the clamp segment 121 of the clamping portion 120 are connected together by resistance welding.

In one embodiment, as shown in fig. 2 and 3, the cooling gap 140 gradually narrows in the direction of the cooling gas flow, i.e., the cooling gap 140 gradually narrows from the end of the thermal shield spring 131 away from the clamp segment 121 to the end of the thermal shield spring 131 close to the clamp segment 121. With such an arrangement, the cooling gap 140 is set to be narrower and narrower, so that the flow speed of the cooling gas in the cooling gap 140 is faster and faster, the cooling effect of the clamping portion 120 is further improved, and the cooling effect of each position of the clamping portion 120 is more uniform.

A heat insulation structure, as shown in fig. 3, comprising the hook 100, a combustion chamber cylinder 300 and two heat insulation tiles 200, wherein there are two hooks 100 and two heat insulation tiles 200, and the fixing part 110 of the hook 100 is inserted into the sliding slot of the combustion chamber cylinder 300 and fixed by a positioning pin 400; the clamping portions 120 of the hooks 100 are clamped in the side hook grooves 210 of the heat insulation tiles 200 in a one-to-one correspondence, the heat insulation portions 130 of the two hooks 100 are abutted against each other, and the communication holes 132 on the heat insulation portions 130 communicate the cooling gaps 140 of the hooks 100 and the air chambers 220 between the adjacent two heat insulation tiles 200. In this way, by abutting and sealing the heat insulating portions 130 of two adjacent hooks 100, not only the clamping portion 120 of the hook 100 is protected, but also the cooling gas is restricted and guided, so that the cooling gas flows through the cooling gap 140 and the communication hole 132 and enters the gas chamber 220, and the cooling gas cools the outer surface of the clamping portion 120 and the inner side of the heat insulating portion 130 of the hook 100.

The use process of the tool is as follows:

when the cooling device is used, the clamp section 121 on the clamping part 120 of the hook 100 is hooked in the side hook groove 210 of the heat insulation tile, the heat insulation elastic sheets 131 of two adjacent hooks 100 are tightly attached through prepressing deformation during assembly and are used for blocking a channel for communicating cooling gas and hot gas between the two adjacent hooks 100, a cooling gap 140 is formed between each heat insulation elastic sheet 131 and the clamping part 120, and the cooling gas flowing into the combustion chamber cylinder 300 flows through the cooling gap 140 and the communication holes 132 and flows into the air chamber 220 by matching the communication function of the communication holes 132 on the heat insulation elastic sheets 131 on the cooling gap 140 and the air chamber 220 between the adjacent heat insulation tiles 200, so that the cooling gas flows into the combustion chamber cylinder 300, flows through the cooling gap 140 and the communication holes 132 and flows into the air chamber 220, and the cooling of the outer side surface of the clamping part 120 and the inner side surface of the heat insulation part 130 of the hook 100 is realized. Meanwhile, since the heat insulating part 130 is directly ablated by the hot gas instead of the clamping part 120, the mechanical stress part of the hook 100 due to the clamping and the thermal stress part due to the ablation can be separated. When the gap between the adjacent heat insulation tiles 200 is enlarged, the hot gas is invaded, and only the heat insulation elastic sheet 131 cooled by the cooling gas is thermally shocked, so that the contact part between the clamping part 120 and the side hook groove 210 of the heat insulation tile 200 is not affected, the clamping effect of the hook 100 is kept to the maximum extent, and the durability of clamping is improved.

Compared with the traditional design structure, the heat insulation part 130 is connected to the outer side of the clamping part 120 of the hook 100, and a cooling flow channel is formed between the heat insulation part 130 and the clamping part 120, so that the clamping part of the heat insulation tile 200, which is in contact with the hook 100, is effectively protected. The setting of heat insulating part 130 still makes the mechanical stress district and the thermal stress district of couple 100 separate, even in the operation because the gas invasion, also only can burn heat insulating part 130, can not influence the clamping effect of clamping part 120 of couple 100 to heat insulating tile 200, and the risk that heat insulating tile 200 dropped can greatly reduced, can improve the life of couple 100 on the prerequisite of the cooling gas volume on not increasing combustion chamber cylinder body 300.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. A hanger (100) for securing a heat shield tile (200) to a combustion chamber cylinder (300), comprising:

a stationary portion (110), the stationary portion (110) for connecting with the combustion chamber block (300);

the clamping part (120) is connected to one end of the fixing part (110) and is used for being connected with the heat insulation tile (200) and fixing the heat insulation tile (200);

characterized in that it further comprises a heat insulating portion (130), said heat insulating portion (130) being for insulating said clamping portion (120) from hot gas;

the heat insulation part (130) is arranged on one side, away from the fixing part (110), of the clamping part (120), a cooling gap (140) is formed between the heat insulation part (130) and the clamping part (120), and the cooling gap (140) is used for introducing cooling gas and cooling the clamping part (120) and the heat insulation part (130).

2. A hanger according to claim 1, wherein the heat insulating part (130) is provided with a communication hole (132), the communication hole (132) is used for communicating the cooling gap (140) with a gas chamber (220) formed by the side hook grooves (210) of two adjacent heat insulating tiles (200), so that cooling gas flows through the cooling gap (140) and enters the gas chamber (220).

3. A hook according to claim 2, characterized in that said grip portion (120) comprises a clamping section (121), a first connecting section (122), a bending section (123) and a second connecting section (124), said clamping section (121) being intended to be clamped in a lateral hooking slot (210) of said insulating tile (200) and to radially fix said insulating tile (200); the first connecting section (122) is connected between the clamping section (121) and the bending section (123); the bending section (123) is used for being abutted against the end part of the heat insulation tile (200) and axially limiting the heat insulation tile (200); the second connecting section (124) is connected between the bending section (123) and the fixing part (110);

the heat insulation portion (130) comprises a heat insulation elastic sheet (131), one end of the heat insulation elastic sheet (131) is fixedly connected with the clamp section (121), the other end of the heat insulation elastic sheet can be elastically deformed under the action of external force and is close to the bending section (123), and the cooling gap (140) is formed between the heat insulation elastic sheet (131) and the clamping portion (120).

4. A dropper as claimed in claim 3, wherein the communication hole (132) is provided at an end of the thermally insulating resilient strip (131) adjacent to the clamp section (121).

5. A hanger as claimed in claim 4, wherein said communication holes (132) are linearly and uniformly distributed on said heat insulating elastic sheet (131) along the width direction of said heat insulating elastic sheet (131) to form a cold air wall between said clamp section (121) and said hot air.

6. A hook according to claim 4, wherein the heat insulation elastic sheet (131) comprises a heat insulation section (133) and a deformation section (134), one end of the heat insulation section (133) is connected with the clamping section (121), the deformation section (134) is arranged on one side of the bending section (123) departing from the fixing part (110), and the deformation sections (134) of two adjacent heat insulation elastic sheets (131) are abutted and deformed to separate the hot gas from the cooling gas.

7. A dropper as claimed in claim 4, wherein the communication hole (132) is any one of a circular hole, an elliptical hole and a square hole;

the air outlet direction of the communicating hole (132) is vertical to the outer surface of the heat insulation elastic sheet (131); or

The air outlet direction of the communication hole (132) faces the bottom of the side hook groove (210) of the heat insulation tile (200).

8. A dropper as claimed in claim 3, wherein the insulating resilient tab (131) is integrally formed with the clamp section (121); or

One end of the heat insulation elastic sheet (131) is fixedly connected with the clamp section (121) in a welding mode.

9. A hook according to claim 1, characterized in that the cross-sectional area of the cooling gap (140) is gradually narrowed in the direction of the cooling gas flow.

10. A thermal insulation structure comprising a hanger according to any one of claims 1 to 9, further comprising said combustion chamber cylinder (300) and said thermal insulation tiles (200), said hanger (100) having two, said thermal insulation tiles (200) having two; the fixing part (110) of the hook (100) is arranged in a sliding groove on the combustion chamber cylinder body (300), and the clamping parts (120) of the hook (100) clamp in side hook grooves (210) of the heat insulation tile (200) in a one-to-one correspondence manner; the heat insulating parts (130) of the two hooks (100) are connected in contact with each other, and the cooling gaps (140) of the two hooks (100) are communicated with air chambers (220) formed by side hook grooves (210) of the two adjacent heat insulating tiles (200) through communication holes (132).

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