Compressor blade cleaning structure and gas turbine

Abstract

The invention discloses a gas compressor blade cleaning structure and a gas turbine, the gas compressor blade cleaning structure comprises a force bearing outer cylinder, a force bearing inner cylinder, a force bearing support plate and a water spray pipe, the force bearing outer cylinder is provided with a through hole, the force bearing inner cylinder is arranged in the force bearing outer cylinder, the force bearing support plate is arranged between the inner circumferential surface of the force bearing outer cylinder and the outer circumferential surface of the force bearing inner cylinder, and the water spray pipe is arranged in the through hole. At least part of the water spraying pipe is arranged on the side, facing the blades, of the force bearing supporting plate, a plurality of cleaning holes arranged at intervals in the radial direction of the force bearing outer cylinder are formed in the circumferential wall of the water spraying pipe, and the water spraying pipe is suitable for being communicated with liquid supply equipment outside the force bearing outer cylinder through the through hole. The compressor blade cleaning structure provided by the invention has the advantages of high blade cleaning efficiency and high inlet air cooling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbines, and in particular to a compressor blade cleaning structure and a gas turbine. Background Art

[0002] Due to the high ambient temperature in summer, the inlet temperature of the gas turbine increases, causing the gas turbine flow rate to decrease, which will directly reduce the power generation of the gas turbine. However, due to the hot weather in summer and the peak electricity consumption time, the demand for electricity consumption increases. The online water washing technology on the gas turbine can not only clean the compressor blades online, but also cool the gas turbine inlet air, which can effectively increase the power of the gas turbine and effectively solve the unfavorable situation of power reduction in summer conditions. However, in the related technology, the online water washing nozzles are mainly arranged on the inner and outer load-bearing cylinders of the gas turbine, which often causes the water spray to be uneven in the radial direction, and the efficiency of water washing and cooling of the blades is low. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a compressor blade cleaning structure, which has the advantages of high cleaning efficiency for the blades and high cooling efficiency for the inlet air.

[0005] An embodiment of the present invention further provides a gas turbine.

[0006] The compressor blade cleaning structure of the embodiment of the present invention includes a load-bearing outer cylinder, a load-bearing inner cylinder, a load-bearing support plate and a water spray pipe, the load-bearing outer cylinder is provided with a through hole, the load-bearing inner cylinder is arranged in the load-bearing outer cylinder; the load-bearing support plate is arranged between the inner circumference of the load-bearing outer cylinder and the outer circumference of the load-bearing inner cylinder; at least part of the water spray pipe is arranged on the side of the load-bearing support plate facing the blades, the peripheral wall of the water spray pipe is provided with a plurality of cleaning holes arranged at intervals along the radial direction of the load-bearing outer cylinder, and the water spray pipe is suitable for being connected to the liquid supply equipment outside the load-bearing outer cylinder through the through hole.

[0007] According to the compressor blade cleaning structure of the embodiment of the present invention, a water spray pipe is arranged between the load-bearing support plate and the blade, and a plurality of cleaning holes extending radially along the load-bearing outer cylinder are arranged on the peripheral wall of the water spray pipe. At this time, a liquid supply device outside the load-bearing outer cylinder supplies liquid to the water spray pipe, so as to spray the cleaning liquid through the plurality of cleaning holes to the flow channel formed around the load-bearing outer cylinder and the load-bearing inner cylinder. The cleaning liquid in the flow channel has a wider radial distribution range of the load-bearing outer cylinder, thereby having a higher heat exchange efficiency with the hot air in the flow channel, a higher cooling efficiency for the air, and at the same time, it can also more efficiently achieve the cleaning of the front blades, thereby effectively ensuring the power of the gas turbine.

[0008] In some embodiments, there are multiple load-bearing support plates and they are arranged at intervals along the circumference of the load-bearing outer cylinder. The water spray pipe extends radially along the load-bearing outer cylinder, and the water spray pipe is provided on at least part of the load-bearing support plates on one side facing the blade.

[0009] In some embodiments, the compressor blade cleaning structure further includes an atomizing nozzle, the number of the atomizing nozzles is equal to the number of the cleaning holes and corresponds one to one, and the atomizing nozzles are connected to the water spray pipes and block the corresponding cleaning holes.

[0010] In some embodiments, the water spray pipe is connected to the side of the load-bearing support plate facing the blade.

[0011] In some embodiments, the side of the load-bearing support plate facing the blade is a plane perpendicular to the axial direction of the load-bearing outer cylinder;

[0012] Alternatively, the side of the load-bearing support plate facing the blade is a curved surface that matches the outer peripheral surface of the water spray pipe.

[0013] In some embodiments, on a projection plane perpendicular to the axial direction of the load-bearing outer cylinder, a projection of a portion of the water spray pipe located inside the load-bearing outer cylinder is located within a projection of a side surface of the load-bearing support plate toward the blade.

[0014] In some embodiments, the compressor blade cleaning mechanism also includes an annular tube, which is arranged around the outer circumference of the load-bearing outer cylinder, and part of the water spray pipe extends from the through hole to the outside of the load-bearing outer cylinder and is connected to the annular tube.

[0015] In some embodiments, the cross-sectional outer contour of the water spray pipe is circular;

[0016] Alternatively, the cross-sectional outer contour of the water spray pipe matches the cross-sectional outer contour of the through hole, and the through hole is a special-shaped hole.

[0017] In some embodiments, the water spray pipe is welded to the load-bearing outer cylinder at the through hole, or the inner circumferential surface of the through hole and the outer circumferential surface of the water spray pipe are equipped with sealing members.

[0018] A gas turbine according to an embodiment of the present invention includes a compressor blade cleaning structure as described in any of the above embodiments.

[0019] The technical advantages of the gas turbine according to the embodiment of the present invention are the same as the technical advantages of the compressor blade cleaning structure of the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a compressor blade cleaning structure according to an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of a load-bearing support plate, a water spray pipe and an atomizing nozzle in a compressor blade cleaning structure according to an embodiment of the present invention.

[0022] Reference numerals:

[0023] 1. Load-bearing outer cylinder; 2. Load-bearing support plate; 3. Load-bearing inner cylinder; 4. Water spray pipe; 5. Atomizing nozzle; 6. Annular tube; 7. Blades. DETAILED DESCRIPTION

[0024] 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.

[0025] Combine the following Figure 1 and Figure 2 A compressor blade cleaning structure according to an embodiment of the present invention is described.

[0026] The compressor blade cleaning structure of the embodiment of the present invention comprises a load-bearing outer cylinder 1, a load-bearing inner cylinder 3, a load-bearing support plate 2 and a water spray pipe 4. The load-bearing outer cylinder 1 is provided with a through hole, and the load-bearing inner cylinder 3 is arranged in the load-bearing outer cylinder 1. The load-bearing support plate 2 is arranged between the inner circumference of the load-bearing outer cylinder 1 and the outer circumference of the load-bearing inner cylinder 3. At least part of the water spray pipe 4 is arranged on the side of the load-bearing support plate 2 facing the blade 7, and the peripheral wall of the water spray pipe 4 is provided with a plurality of cleaning holes arranged at intervals along the radial direction of the load-bearing outer cylinder 1, and the water spray pipe 4 is suitable for being connected to the liquid supply device outside the load-bearing outer cylinder 1 through the through hole.

[0027] According to the compressor blade cleaning structure of the embodiment of the present invention, a water spray pipe 4 is arranged between the load-bearing support plate 2 and the blade 7, and a plurality of cleaning holes extending radially along the load-bearing outer cylinder 1 are arranged on the peripheral wall of the water spray pipe 4. At this time, the liquid supply device outside the load-bearing outer cylinder 1 supplies liquid to the water spray pipe 4, so as to spray the cleaning liquid through the plurality of cleaning holes to the flow channel formed around the load-bearing outer cylinder 1 and the load-bearing inner cylinder 3. The cleaning liquid in the flow channel has a wider radial distribution range of the load-bearing outer cylinder 1, thereby having a higher heat exchange efficiency with the hot air in the flow channel, a higher cooling efficiency for the air, and at the same time, it can also more efficiently achieve the cleaning of the front blade 7, thereby effectively ensuring the power of the gas turbine.

[0028] In some embodiments, there are multiple load-bearing support plates 2 and they are arranged at intervals along the circumference of the load-bearing outer cylinder 1. The water spray pipe 4 extends radially along the load-bearing outer cylinder 1, and at least part of the load-bearing support plates 2 are provided with a water spray pipe 4 on one side facing the blade 7.

[0029] As a result, the cleaning liquid sprayed from all the cleaning holes is distributed in a wider range along the circumferential direction of the load-bearing outer cylinder 1 in the flow channel, thereby achieving a higher cleaning efficiency for the blades 7 and a better cooling effect on the air in the flow channel.

[0030] Specifically, a plurality of bearing plates 2 are arranged at equal intervals along the circumference of the bearing outer cylinder 1, and the number of water spray pipes 4 may be equal to the number of bearing plates 2 or less than the number of bearing plates 2. In the latter case, a plurality of water spray pipes 4 are arranged at equal intervals along the circumference of the bearing outer cylinder 1. At the same time, a plurality of cleaning holes in each water spray pipe 4 are arranged at equal intervals along the axial direction of the water spray pipe 4.

[0031] In some embodiments, Figure 1 and Figure 2 As shown, the compressor blade cleaning structure also includes atomizing nozzles 5. The number of atomizing nozzles 5 is equal to the number of cleaning holes and corresponds one to one. The atomizing nozzles 5 are connected to the water spray pipes 4 and block the corresponding cleaning holes.

[0032] The atomizing nozzle 5 can atomize the cleaning liquid entering the flow channel, so that the cleaning liquid is more evenly dispersed in the flow channel, and more evenly contacts the blades 7 and exchanges heat with the air in the flow channel, thereby further improving the cleaning efficiency of the blades 7 and the cooling of the air in the flow channel.

[0033] Specifically, the atomizing nozzle 5 may be welded to the water spray pipe 4 , or the atomizing nozzle 5 may be threadedly fitted in the cleaning hole, with the outlet direction of the atomizing nozzle 5 facing the blade 7 .

[0034] In some embodiments, the water spray pipe 4 is connected to the side of the load-bearing support plate 2 facing the blade 7 .

[0035] This arrangement effectively improves the installation strength of the water spray pipe 4 in the load-bearing outer cylinder 1. When the compressor is working, the water spray pipe 4 is subjected to less impact force from the inlet air, and the position reliability of the water spray pipe 4 in the load-bearing outer cylinder 1 is higher. Moreover, this arrangement also effectively prevents the water spray pipe 4 from interfering with the diversion effect of the load-bearing outer cylinder 1.

[0036] Specifically, the outer peripheral surface of the water spray pipe 4 is welded to the side of the load-bearing support plate 2 facing the blade 7 .

[0037] In some embodiments, Figure 2 As shown, the side surface of the load-bearing support plate 2 facing the blade 7 is a plane perpendicular to the axial direction of the load-bearing outer cylinder 1 .

[0038] This arrangement can make the welding area between the water spray pipe 4 and the load-bearing support plate 2 larger, and the connection strength between the water spray pipe 4 and the load-bearing support plate 2 greater.

[0039] Alternatively, the side of the load-bearing support plate 2 facing the blade 7 is a curved surface matching the outer peripheral surface of the water spray pipe 4. This arrangement also facilitates the welding of the water spray pipe 4 and the load-bearing support plate 2, and the connection strength between the two is greater.

[0040] Specifically, Figure 2As shown, the water spray pipe 4 extends along the radial direction of the load-bearing support plate 2 to the outer periphery of the load-bearing inner cylinder 3. After the water spray pipe 4 is connected to the load-bearing support plate 2, the outer surface of the water spray pipe 4 is connected to the side of the trailing edge of the load-bearing support plate 2.

[0041] It should be noted that the outer surface of the water spray pipe 4 can also be smoothly connected with the side surfaces of the load-bearing support plate 2 that are opposite to the circumference of the load-bearing outer cylinder 1, that is, the outer contour jointly formed by the water spray pipe 4 and the load-bearing support plate 2 is the same as the outer contour of the load-bearing support plate 2 in the related technology, thereby further ensuring the diversion effect of the load-bearing support plate 2.

[0042] In some embodiments, on a projection plane perpendicular to the axial direction of the load-bearing outer cylinder 1 , the projection of the portion of the water spray pipe 4 located inside the load-bearing outer cylinder 1 is located inside the projection of the side of the load-bearing support plate 2 facing the blade 7 .

[0043] As a result, the load-bearing support plate 2 has a better shielding effect on the water spray pipe 4, and the water spray pipe 4 is less likely to be impacted by the airflow and change its position, while also better ensuring the diversion effect of the load-bearing support plate 2.

[0044] Specifically, the width of the plane of the load-bearing support plate 2 adjacent to the blades 7 is greater than or equal to the outer diameter of the water spray pipe 4 .

[0045] In some embodiments, the compressor blade 7 cleaning structure also includes an annular tube 6, which is arranged around the outer peripheral side of the load-bearing outer cylinder 1, and part of the water spray pipe 4 extends from the through hole to the outside of the load-bearing outer cylinder 1 and is connected to the annular tube 6.

[0046] The setting of the annular pipe 6 allows multiple water spray pipes 4 to be connected in parallel. After the liquid supply equipment pumps the cleaning liquid into the annular pipe 6, it can enter each water spray pipe 4 more evenly, and then be sprayed more evenly in the flow channel by each atomizing nozzle 5. The cleaning liquid has a better cooling effect on the air at the inlet of the compressor and a better cleaning effect on the blades 7.

[0047] Specifically, one end of the water spray pipe 4 located outside the load-bearing outer cylinder 1 is welded to the inner circumferential surface of the annular pipe 6 .

[0048] In some embodiments, the cross-sectional outer contour of the water spray pipe 4 is circular, so that the structure of the water spray pipe 4 is simple and the cost is low.

[0049] Alternatively, the cross-sectional outer contour of the water spray pipe 4 matches the cross-sectional outer contour of the through hole, and the through hole is a special-shaped hole. Thus, after the water spray pipe 4 is matched with the through hole, the position reliability of the water spray pipe 4 relative to the load-bearing outer cylinder 1 is further guaranteed, and the water spray pipe 4 is less likely to change position when impacted by airflow.

[0050] Specifically, the outer contour of the cross section of the water spray pipe 4 may be in a square, arched or other shape, and the outer peripheral surface of the water spray pipe 4 may include a plane that is in contact with the side surface of the trailing edge of the load-bearing support plate 2 .

[0051] In some embodiments, the water spray pipe 4 is welded to the load-bearing outer cylinder 1 at the through hole, or the inner circumference of the through hole and the outer circumference of the water spray pipe 4 are equipped with sealing members.

[0052] The above arrangement can ensure the waterproof sealing of the water spray pipe 4 and the load-bearing outer cylinder 1 at the through hole, and effectively prevent the cleaning liquid or gas in the flow channel from leaking therefrom.

[0053] A gas turbine according to an embodiment of the present invention includes a compressor blade cleaning structure as described in any one of the above embodiments.

[0054] The technical advantages of the gas turbine according to the embodiment of the present invention are the same as the technical advantages of the compressor blade cleaning structure of the above-mentioned embodiment, which will not be repeated here.

[0055] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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 compressor blade cleaning structure, characterized in that: include: A load-bearing outer cylinder and a load-bearing inner cylinder, wherein the load-bearing outer cylinder is provided with a through hole, and the load-bearing inner cylinder is arranged inside the load-bearing outer cylinder; A load-bearing support plate, the load-bearing support plate being arranged between the inner circumferential surface of the load-bearing outer cylinder and the outer circumferential surface of the load-bearing inner cylinder; A water spray pipe, at least part of which is arranged on the side of the load-bearing support plate facing the blades, and a peripheral wall of the water spray pipe is provided with a plurality of cleaning holes arranged at intervals along the radial direction of the load-bearing outer cylinder, and the water spray pipe is suitable for being connected to a liquid supply device outside the load-bearing outer cylinder through the through hole.

2. The compressor blade cleaning structure according to claim 1, characterized in that: There are a plurality of load-bearing support plates which are arranged at intervals along the circumference of the load-bearing outer cylinder. The water spray pipe extends radially along the load-bearing outer cylinder. The water spray pipe is provided on at least one side of the load-bearing support plates facing the blades.

3. The compressor blade cleaning structure according to claim 2, characterized in that: The compressor blade cleaning structure also includes an atomizing nozzle, the number of which is equal to and corresponds to the number of the cleaning holes, and the atomizing nozzle is connected to the water spray pipe and blocks the corresponding cleaning hole.

4. The compressor blade cleaning structure according to claim 1, characterized in that: The water spray pipe is connected to the side of the load-bearing support plate facing the blade.

5. The compressor blade cleaning structure according to claim 4, characterized in that: The side surface of the load-bearing support plate facing the blade is a plane perpendicular to the axial direction of the load-bearing outer cylinder; Alternatively, the side of the load-bearing support plate facing the blade is a curved surface that matches the outer peripheral surface of the water spray pipe.

6. The compressor blade cleaning structure according to claim 5, characterized in that: On a projection plane perpendicular to the axial direction of the load-bearing outer cylinder, the projection of the portion of the water spray pipe located inside the load-bearing outer cylinder is located within the projection of the side of the load-bearing support plate toward the blade.

7. The compressor blade cleaning structure according to claim 2, characterized in that: The compressor blade cleaning mechanism also includes an annular tube, which is arranged around the outer peripheral side of the load-bearing outer cylinder, and part of the water spray pipe extends from the through hole to the outside of the load-bearing outer cylinder and is connected to the annular tube.

8. The compressor blade cleaning structure according to claim 7, characterized in that: The outer contour of the cross section of the water spray pipe is circular; Alternatively, the cross-sectional outer contour of the water spray pipe matches the cross-sectional outer contour of the through hole, and the through hole is a special-shaped hole.

9. The compressor blade cleaning structure according to claim 1, characterized in that: The water spray pipe is welded to the load-bearing outer cylinder at the through hole, or the inner circumferential surface of the through hole and the outer circumferential surface of the water spray pipe are equipped with sealing members.

10. A gas turbine, characterized in that: It comprises a compressor blade cleaning structure according to any one of claims 1-9.

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