Anti-loose filler strip and gas turbine

Abstract

The anti-loose filler strip is used for being clamped between a carrier and a blade and comprises a first filler strip body, a second filler strip body and a temperature adjusting piece, the first filler strip body and the second filler strip body are oppositely arranged and connected, at least one of the first filler strip body and the second filler strip body is made of memory alloy, and the temperature adjusting piece is arranged between the first filler strip body and the second filler strip body. The temperature adjusting piece is arranged in the memory alloy and used for adjusting the temperature of the memory alloy so that the jacking acting force of the anti-loosening filler strip between the carrier and the blade can be adjusted. The shape of the anti-loose filler strip can be automatically changed and adjusted according to needs, so that the magnitude of elastic acting force applied outwards can be adjusted, the anti-loose filler strip can be fully supported between a carrier and a blade, it is guaranteed that large friction acting force exists between the carrier and the blade, and the service life of the anti-loose filler strip is prolonged. And the condition that the blades easily slide laterally relative to the carrier is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbines, and in particular to an anti-loosening gasket and a gas turbine. Background Art

[0002] A gas turbine is a power device that converts the internal energy of fuel into mechanical energy. The compressor part of a gas turbine mainly includes moving blades, stationary blades, cylinders, retaining rings, and impellers, among which the blade roots of stationary blades are usually installed in the blade root grooves of the retaining rings or cylinders, and the blade roots of moving blades are usually installed in the blade root grooves of the impeller. When in use, the moving blades will rotate synchronously with the impeller to achieve the compression effect.

[0003] However, in the prior art, when the gas turbine is in a low-speed stage such as startup or blade tip grinding, the centrifugal force of the moving blades is small and the friction force between the positioning surfaces of the moving blades and the blade root grooves is small, which makes the moving blades prone to lateral sliding, which is not conducive to the stable operation of the gas turbine and also reduces the overall compression efficiency. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an anti-loosening pad strip, which can adjust its shape according to needs, so as to adjust the size of the elastic force applied outward, so that the anti-loosening pad strip can be fully supported between the carrier and the blade, thereby ensuring a large friction force between the carrier and the blade, and avoiding the blade from easily sliding sideways relative to the carrier.

[0006] An embodiment of the present invention further provides a gas turbine comprising the anti-loosening gasket.

[0007] The anti-loosening pad strip of the embodiment of the present invention is used to be clamped between the carrier and the blade, and includes:

[0008] A first cushion bar and a second cushion bar, wherein the first cushion bar and the second cushion bar are arranged opposite to each other and connected, and at least one of the first cushion bar and the second cushion bar is made of a memory alloy;

[0009] A temperature regulating component is arranged in the memory alloy and is used to regulate the temperature of the memory alloy so that the supporting force of the anti-loosening pad between the carrier and the blade is adjustable.

[0010] In some embodiments, one longitudinal side of the first cushion strip is connected to one longitudinal side of the second cushion strip, the other longitudinal side of the first cushion strip is connected to the other longitudinal side of the second cushion strip, and the first cushion strip and the second cushion strip are arranged at intervals and define an inner cavity therebetween.

[0011] In some embodiments, one of the longitudinal sides of the first cushion strip and the longitudinal side of the second cushion strip is provided with a clamping projection, and the other is provided with a clamping groove, and the clamping projection is fitted into the clamping groove to connect the longitudinal sides of the first cushion strip and the second cushion strip.

[0012] In some embodiments, both the clamping projection and the clamping groove extend along the extending direction of the longitudinal side.

[0013] In some embodiments, the width dimension of the inner cavity in the relative direction of the first cushion strip and the second cushion strip first increases and then decreases along the transverse direction of the anti-loosening cushion strip.

[0014] In some embodiments, the first cushion strip includes two first inclined segments and a first straight segment, and the first straight segment is connected between the two first inclined segments;

[0015] The second cushion strip includes two second inclined segments and a second straight segment, and the second straight segment is connected between the two second inclined segments;

[0016] The temperature adjusting member is disposed on at least one of the first straight segment and the second straight segment.

[0017] In some embodiments, a plurality of the temperature adjusting members are provided on both the first straight segment and the second straight segment. The plurality of temperature adjusting members on the first straight segment are arranged at intervals along the transverse direction, and the plurality of temperature adjusting members on the second straight segment are arranged at intervals along the transverse direction.

[0018] In some embodiments, a first groove is provided on the transverse side of the first cushion strip, and a second groove is provided on the transverse side of the second cushion strip;

[0019] And / or, the temperature adjusting member is a heating wire, and the heating wire extends along the longitudinal direction of the anti-loosening cushion strip.

[0020] The gas turbine according to an embodiment of the present invention includes:

[0021] A carrier and blades, and the blades are assembled on the carrier;

[0022] An anti-loosening cushion strip, which is disposed between the carrier and the blades, and the shape of the anti-loosening cushion strip changes with different temperatures so that the propping force applied between the carrier and the blades by the anti-loosening cushion strip is adjustable.

[0023] In some embodiments, the anti-loosening pad strip is an anti-loosening pad strip as described in any of the above embodiments;

[0024] The gas turbine includes stationary blades, a compressor holding ring, moving blades and a wheel disc. The stationary blades are mounted on the compressor holding ring, and the moving blades are mounted on the wheel disc. The compressor holding ring or the wheel disc constitutes the carrier, and the stationary blades or the moving blades constitute the blades.

[0025] Beneficial effects: The anti-loosening pad and gas turbine of the embodiments of the present invention are capable of automatically adjusting the shape of the anti-loosening pad as needed, thereby adjusting the size of the elastic force applied outward, and further enabling the anti-loosening pad to fully support the space between the carrier and the blades, thereby ensuring a greater friction force between the carrier and the blades and preventing the blades from easily sliding sideways relative to the carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the anti-loosening pad strip according to an embodiment of the present invention.

[0027] Figure 2 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0028] Figure 3 It is a partial structural schematic diagram of a gas turbine according to an embodiment of the present invention.

[0029] Figure 4 yes Figure 3 A local enlarged schematic diagram of point B in the middle.

[0030] Figure 5 It is a schematic diagram of the arrangement of the anti-loosening pads between the stationary blades and the compressor holding ring according to an embodiment of the present invention.

[0031] Figure 6 yes Figure 3 A partial enlarged schematic diagram of point C in the middle.

[0032] Figure 7 It is a schematic diagram of the arrangement of the anti-loosening pads between the moving blades and the wheel disc according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 100- anti-loosening pad;

[0035] 1-first cushion strip; 11-first longitudinal edge; 12-clamping protrusion; 13-first inclined section; 14-first straight section; 15-first groove;

[0036] 2-second cushion strip; 21-second longitudinal edge; 22-slot; 23-second inclined section; 24-second straight section; 25-second slot;

[0037] 3-temperature regulating element; 4-inner cavity;

[0038] 200-stationary blades; 300-compressor holding ring; 400-moving blades; 500-wheel; 600-outer cylinder; 700-center shaft. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] The anti-loosening gasket strip 100 of the embodiment of the present invention is used to be clamped between a carrier and a blade. For example, the carrier may be a holding ring of a gas turbine, and the blade may be a moving blade 400 or a stationary blade 200 of the gas turbine. The blade may be assembled on the carrier, and the anti-loosening gasket strip 100 may be clamped and fixed in the gap between the carrier and the blade.

[0041] like Figure 1 and Figure 2 As shown, the anti-loosening gasket strip 100 according to the embodiment of the present invention includes a first gasket strip 1 , a second gasket strip 2 and a temperature regulating component 3 .

[0042] The first cushion strip 1 and the second cushion strip 2 are arranged opposite to each other and connected, and at least one of the first cushion strip 1 and the second cushion strip 2 is made of a memory alloy. Figure 2 As shown, the first cushion strip 1 and the second cushion strip 2 can both be substantially in the shape of long strips, and the first cushion strip 1 and the second cushion strip 2 can be stacked and arranged, and the first cushion strip 1 and the second cushion strip 2 extend in the same direction.

[0043] The first pad 1 and the second pad 2 can be directly connected and fixed, and the material of the first pad 1 and the second pad 2 can be a memory alloy, and the memory alloy can specifically be a titanium-nickel alloy, a copper-nickel alloy, etc. In some other embodiments, one of the first pad 1 and the second pad 2 can also be a memory alloy.

[0044] It should be noted that the memory alloy has a shape memory effect, and when the temperature of the memory alloy changes, the shape and form of the memory alloy itself will also change. For example, the memory alloy has a phase transition temperature. When the temperature exceeds the phase transition temperature, the memory alloy can restore its shape and form.

[0045] The temperature regulating element 3 is arranged in the memory alloy, and the temperature regulating element 3 is used to regulate the temperature of the memory alloy so that the supporting force of the anti-loosening pad strip 100 between the carrier and the blade can be adjusted.

[0046] For example, the thermostat 3 may be a heating wire, specifically a heating resistor wire, and the thermostat 3 may be pre-buried in the memory alloy. When in use, current may be passed into the thermostat 3, whereby the thermostat 3 generates heat and heats the memory alloy, and the heated memory alloy changes in shape and form, and such changes and adjustments may cause a change in the magnitude of the supporting force applied by the anti-loosening pad strip 100 between the carrier and the blade.

[0047] For example, when the supporting force increases, the squeezing force between the carrier and the blades will increase, thereby increasing the friction force between the carrier and the blades. The increased friction force will limit the relative movement or slip between the carrier and the blades, ensuring the stability of the relative position of the carrier and the blades.

[0048] The anti-loosening gasket strip 100 of the embodiment of the present invention can adjust its shape according to needs, so as to adjust the size of the elastic force applied outward, so that the anti-loosening gasket strip 100 can be fully supported between the carrier and the blade, thereby ensuring that there is a large friction force between the carrier and the blade, avoiding the blade from easily sliding sideways relative to the carrier, and thus avoiding the situation where the overall operating stability and compression efficiency of the gas turbine are reduced due to the lateral sliding of the blade.

[0049] In some embodiments, one longitudinal edge of the first pad 1 is connected to one longitudinal edge of the second pad 2, the other longitudinal edge of the first pad 1 is connected to the other longitudinal edge of the second pad 2, and the first pad 1 and the second pad 2 are arranged at intervals and an inner cavity 4 is limited between the first pad 1 and the second pad 2.

[0050] For example, Figure 2 As shown, the first mat strip 1 includes two first longitudinal edges 11, both of which extend in the longitudinal direction of the first mat strip 1, and the two first longitudinal edges 11 are respectively the left edge and the right edge of the first mat strip 1. The second mat strip 2 includes two second longitudinal edges 21, both of which extend in the longitudinal direction of the second mat strip 2, and the two second longitudinal edges 21 are respectively the left edge and the right edge of the second mat strip 2.

[0051] The first longitudinal edge 11 on the left side of the first cushion strip 1 and the second longitudinal edge 21 on the left side of the second cushion strip 2 are connected and fixed, and the first longitudinal edge 11 on the right side of the first cushion strip 1 and the second longitudinal edge 21 on the right side of the second cushion strip 2 are connected and fixed. The other parts of the first cushion strip 1 and the second cushion strip 2 can be arranged at intervals in the relative direction of the first cushion strip 1 and the second cushion strip 2, so that a flat inner cavity 4 can be formed between the first cushion strip 1 and the second cushion strip 2.

[0052] Therefore, on the one hand, the integrated design of the first gasket strip 1 and the second gasket strip 2 is realized, and on the other hand, the inner cavity 4 can also provide deformation space for the deformation of the first gasket strip 1 and the second gasket strip 2, which is also conducive to improving the overall elastic performance of the anti-loosening gasket strip 100.

[0053] In some embodiments, one of the longitudinal edges of the first pad strip 1 and the second pad strip 2 is provided with a latching protrusion 12, and the other is provided with a latching groove 22, and the latching protrusion 12 fits in the latching groove 22 to connect the longitudinal edge of the first pad strip 1 and the longitudinal edge of the second pad strip 2.

[0054] For example, Figure 2 As shown, the protrusion 12 can be integrally formed on the first longitudinal edge 11 of the first cushion strip 1, and both first longitudinal edges 11 of the first cushion strip 1 are provided with a protrusion 12. Both second longitudinal edges 21 of the second cushion strip 2 can be provided with a groove 22. The protrusion 12 and the groove 22 can extend in the longitudinal direction of the anti-loosening cushion strip 100.

[0055] During assembly, the first mat strip 1 can be stacked on top of the second mat strip 2, and the two first longitudinal edges 11 of the first mat strip 1 and the two second longitudinal edges 21 of the second mat strip 2 are arranged opposite to each other, wherein the clamping protrusion 12 of the first longitudinal edge 11 on the left side of the first mat strip 1 can be clamped and fitted in the clamping groove 22 of the second longitudinal edge 21 on the left side of the second mat strip 2, and the clamping protrusion 12 of the first longitudinal edge 11 on the right side of the second mat strip 2 can be clamped and fitted in the clamping groove 22 of the second longitudinal edge 21 on the right side of the second mat strip 2. Thus, the connection, fixation and assembly of the first mat strip 1 and the second mat strip 2 are facilitated.

[0056] In some embodiments, the width of the inner cavity 4 in the relative direction of the first gasket strip 1 and the second gasket strip 2 increases first and then decreases along the transverse direction of the anti-loosening gasket strip 100. Figure 2 As shown, the inner cavity 4 can be flat as a whole, the width of the inner cavity 4 can be a dimension M, the transverse direction of the anti-loosening pad strip 100 can be a left-right direction, and the dimension M can first increase and then decrease along the direction from left to right. In this way, the assembly requirements of the two longitudinal edges of the first pad strip 1 and the second pad strip 2 are met, and the space in the middle of the inner cavity 4 is large enough, thereby fully meeting the use requirements of the first pad strip 1 and the second pad strip 2 for deformation.

[0057] In some embodiments, the first pad 1 includes two first inclined sections 13 and a first straight section 14, the first straight section 14 is connected between the two first inclined sections 13, the second pad 2 includes two second inclined sections 23 and a second straight section 24, the second straight section 24 is connected between the two second inclined sections 23, and the temperature regulating component 3 is arranged on at least one of the first straight section 14 and the second straight section 24.

[0058] For example, Figure 2As shown, the first straight section 14 can be arranged horizontally. At this time, the first inclined section 13 on the left side of the first cushion strip 1 can be arranged tilted downward, and the first inclined section 13 on the right side of the first cushion strip 1 can also be arranged tilted downward, and the distance between the two first inclined sections 13 of the first cushion strip 1 in the left and right directions can gradually increase from top to bottom.

[0059] The second straight section 24 can also be arranged horizontally. In this case, the second inclined section 23 on the left side of the second cushion strip 2 can be arranged tilted upward, and the second inclined section 23 on the right side of the second cushion strip 2 can also be arranged tilted upward, and the distance between the two second inclined sections 23 of the second cushion strip 2 in the left and right directions can gradually increase from bottom to top.

[0060] There can be multiple temperature control components 3 , some of which can be arranged on the first straight section 14 , and other temperature control components 3 can be arranged on the second straight section 24 , thereby fully meeting the need for adjusting the shape changes of the first cushion strip 1 and the second cushion strip 2 .

[0061] In some embodiments, the first straight section 14 and the second straight section 24 are both provided with a plurality of temperature regulating elements 3 , the plurality of temperature regulating elements 3 of the first straight section 14 are arranged at intervals along the transverse direction, and the plurality of temperature regulating elements 3 of the second straight section 24 are arranged at intervals along the transverse direction.

[0062] For example, Figure 2 As shown, the temperature regulating component 3 is a heating wire, and multiple temperature regulating components 3 can be embedded in the first straight section 14 and the second straight section 24, wherein the multiple temperature regulating components 3 of the first straight section 14 can be arranged at intervals along the left-right direction, and the multiple temperature regulating components 3 of the second straight section 24 can be arranged at intervals along the left-right direction.

[0063] The number of the temperature regulating components 3 of the first straight section 14 can be the same as the number of the temperature regulating components 3 of the second straight section 24, and the multiple temperature regulating components 3 of the first straight section 14 and the multiple temperature regulating components 3 of the second straight section 24 can be arranged one by one in the vertical direction. Thus, the uniformity of the thermal deformation of the first cushion strip 1 and the second cushion strip 2 at each position can be ensured, which is conducive to enhancing the controllability of the deformation of the first cushion strip 1 and the second cushion strip 2.

[0064] In some embodiments, the first gasket strip 1 has a first groove 15 on its lateral side, and the second gasket strip 2 has a second groove 25 on its lateral side. Figure 2 As shown, the transverse edge of the first cushion strip 1 is the edge between the two first longitudinal edges 11 of the first cushion strip 1 , the first groove 15 may be a semicircular groove, and the first groove 15 may be arranged in the middle of the transverse edge of the first cushion strip 1 .

[0065] Similarly, the transverse edge of the second gasket strip 2 is the edge between the two second longitudinal edges 21 of the second gasket strip 2 , and the second groove 25 may be a semicircular groove. The second groove 25 may be disposed in the middle of the transverse edge of the second gasket strip 2 .

[0066] The first groove 15 and the second groove 25 can play a role in processing positioning on the one hand, and can also play a role in avoiding and positioning during assembly on the other hand. For example, the first groove 15 and the second groove 25 can be used for positioning pins used to press the blades to pass through, thereby fully ensuring the structural stability of the assembly.

[0067] In some embodiments, the temperature regulating element 3 is a heating wire, and the heating wire is arranged to extend along the longitudinal direction of the anti-loosening pad strip 100. Figure 2 As shown, the temperature regulating component 3 can be pre-embedded in the first straight section 14 and the second straight section 24, and the multiple temperature regulating components 3 of the first straight section 14 can be distributed on both sides of the first groove 15, and the multiple temperature regulating components 3 of the second straight section 24 can be distributed on both sides of the second groove 25, and each temperature regulating component 3 can be arranged along the longitudinal extension of the anti-loosening pad strip 100, thereby ensuring the uniform distribution of the temperature regulating components 3.

[0068] Next, a gas turbine according to an embodiment of the present invention will be described.

[0069] The gas turbine according to the embodiment of the present invention includes a carrier, a blade and a locking gasket 100 .

[0070] The blades are assembled on the carrier, and the anti-loosening gasket strip 100 is arranged between the carrier and the blades. The shape of the anti-loosening gasket strip 100 changes with the temperature so that the supporting force applied by the anti-loosening gasket strip 100 between the carrier and the blades is adjustable.

[0071] For example, the blades may be moving blades 400, stationary blades 200, etc. of a gas turbine, the carrier may be a structural component for assembling the moving blades 400 and stationary blades 200, the blades and the carrier may be assembled in the radial direction of the gas turbine, a gap may be reserved between the blades and the carrier, and the anti-loosening gasket strip 100 may be assembled in the gap.

[0072] When in use, the shape of the anti-loosening gasket strip 100 can be changed and adjusted by actively adjusting the temperature of the anti-loosening gasket strip 100, and the size of the supporting force applied by the anti-loosening gasket strip 100 between the blade and the carrier can be adjusted by adjusting the shape of the anti-loosening gasket strip 100, thereby adjusting the size of the friction force between the blade and the carrier, thereby restraining the relative slippage of the blade and the carrier, and avoiding the situation where the gas turbine is prone to lateral slippage due to the small extrusion force between the blade and the carrier being too small due to the small centrifugal force.

[0073] In some embodiments, the anti-loosening pad 100 is an anti-loosening pad 100 as described in any of the above embodiments, and the gas turbine includes a stationary blade 200, a compressor holding ring 300, a moving blade 400 and a wheel 500. The stationary blade 200 is assembled on the compressor holding ring 300, and the moving blade 400 is assembled on the wheel 500. The compressor holding ring 300 or the wheel 500 constitutes a carrier, and the stationary blade 200 or the moving blade 400 constitutes a blade.

[0074] For example, Figure 3 As shown, the gas turbine further includes an outer cylinder 600 and a central shaft 700, etc. The above-mentioned wheel disc 500 can be sleeved on the outer peripheral side of the central shaft 700, and a plurality of moving blades 400 can be provided. The plurality of moving blades 400 can be assembled in the blade root grooves on the outer peripheral side of the wheel disc 500, and the compressor holding ring 300 can be sleeved on the outer peripheral side of the plurality of moving blades 400. The above-mentioned outer cylinder 600 can be arranged on the outer peripheral side of the compressor holding ring 300, and a stationary blade 200 can be respectively assembled in each blade root groove on the inner side of the compressor holding ring 300. The plurality of moving blades 400 and the plurality of stationary blades 200 are alternately arranged in the axial direction of the central shaft 700.

[0075] like Figure 4 As shown, an anti-loosening pad 100 may be installed between each stationary blade 200 and the groove wall of the blade root groove of the compressor holding ring 300, such as Figure 5 As shown, a plurality of locking gasket strips 100 may be arranged at equal intervals along the circumferential direction of the central axis 700. Figure 6 As shown, an anti-loosening pad 100 may also be installed between each moving blade 400 and the groove wall of the blade root groove of the wheel 500, such as Figure 6 As shown, these locking gasket strips 100 are also arranged at equal intervals along the circumferential direction of the central axis 700 .

[0076] When the gas turbine is in the startup stage or the low-speed blade tip grinding stage, current can be passed through the temperature regulating component 3 (heating resistor wire) of each anti-loosening pad 100. At this time, the temperature of the temperature regulating component 3 will increase, thereby causing the temperature of each anti-loosening pad 100 to increase accordingly. When the temperature of the anti-loosening pad 100 exceeds the phase change temperature, the anti-loosening pad 100 will change its shape or return to its initial shape. By virtue of the change in the shape of the anti-loosening pad 100 itself, the anti-loosening pad 100 can exert a greater elastic force. Under the action of the increased elastic force, there will be a greater friction force between the stationary blade 200 and the compressor holding ring 300, and between the moving blade 400 and the wheel 500, thereby avoiding the stationary blade 200, the moving blade 400, etc. from easily slipping lateral direction.

[0077] In some embodiments, each temperature regulating component 3 can be externally connected through wires, etc. When the anti-loosening pad 100 is installed on the moving blade 400 and the wheel 500, since the moving blade 400 and the wheel 500 will rotate during use, in order to avoid entanglement and interference of the wires, etc., at this time, at this time, the external connection of each wire can be achieved by setting a conductive slip ring, thereby meeting the use needs of conductivity and avoiding problems such as entanglement caused by rotation.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0082] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0083] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A locking pad, characterized in that: For clamping between a carrier and a blade, and comprising: A first cushion bar and a second cushion bar, wherein the first cushion bar and the second cushion bar are arranged opposite to each other and connected, and at least one of the first cushion bar and the second cushion bar is made of a memory alloy; A temperature regulating component is arranged in the memory alloy and is used to regulate the temperature of the memory alloy so that the supporting force of the anti-loosening pad between the carrier and the blade is adjustable.

2. The anti-loosening pad strip according to claim 1, characterized in that: One longitudinal edge of the first pad strip is connected to one longitudinal edge of the second pad strip, the other longitudinal edge of the first pad strip is connected to the other longitudinal edge of the second pad strip, and the first pad strip and the second pad strip are arranged at intervals and define an inner cavity between the first pad strip and the second pad strip.

3. The anti-loosening pad strip according to claim 2, characterized in that: One of the longitudinal edge of the first pad strip and the longitudinal edge of the second pad strip is provided with a latching protrusion, and the other one is provided with a latching groove, and the latching protrusion fits in the latching groove to connect the longitudinal edge of the first pad strip and the longitudinal edge of the second pad strip.

4. The anti-loosening gasket according to claim 3, characterized in that: The clamping protrusion and the clamping groove are both extended and arranged along the extension direction of the longitudinal edge.

5. The anti-loosening gasket according to claim 2, characterized in that: The width dimension of the inner cavity in the relative direction of the first gasket strip and the second gasket strip first increases and then decreases along the transverse direction of the anti-loosening gasket strip.

6. The anti-loosening gasket according to claim 5, characterized in that: The first gasket includes two first inclined sections and a first straight section, wherein the first straight section is connected between the two first inclined sections; The second cushion strip comprises two second inclined sections and a second straight section, wherein the second straight section is connected between the two second inclined sections; The temperature regulating component is disposed on at least one of the first straight section and the second straight section.

7. The anti-loosening gasket according to claim 6, characterized in that: The first straight section and the second straight section are both provided with a plurality of the temperature regulating elements. The plurality of the temperature regulating elements of the first straight section are arranged at intervals along the transverse direction, and the plurality of the temperature regulating elements of the second straight section are arranged at intervals along the transverse direction.

8. The anti-loosening gasket according to any one of claims 1 to 7, characterized in that: The transverse side of the first gasket strip is provided with a first groove, and the transverse side of the second gasket strip is provided with a second groove; And / or, the temperature regulating element is a heating wire, and the heating wire is arranged to extend along the longitudinal direction of the anti-loosening pad strip.

9. A gas turbine, characterized in that: include: A carrier and a blade, wherein the blade is mounted on the carrier; An anti-loosening pad strip is provided between the carrier and the blade, and the shape of the anti-loosening pad strip changes with temperature so that the supporting force applied by the anti-loosening pad strip between the carrier and the blade is adjustable.

10. The gas turbine according to claim 9, characterized in that The anti-loosening pad strip is the anti-loosening pad strip as described in any one of claims 1 to 8 above; The gas turbine includes stationary blades, a compressor holding ring, moving blades and a wheel disc. The stationary blades are mounted on the compressor holding ring, and the moving blades are mounted on the wheel disc. The compressor holding ring or the wheel disc constitutes the carrier, and the stationary blades or the moving blades constitute the blades.

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