JP6521702B2 - Turbo type fluid machine cleaning device and turbo type fluid machine - Google Patents

Description

  The present invention relates to a cleaning apparatus and turbo type fluid machine for a turbo type fluid machine having blades and vanes.

  Conventionally, there is an axial flow fan having a wing and an induction wing, and there is known a wing cleaning device for cleaning dust attached to and accumulated on the wing of the axial flow fan in order to suppress a decrease in work efficiency of the axial flow fan. (See, for example, Patent Document 1). The axial flow fan is provided with guiding wings on the front side and the rear side of the wing, and a plurality of wingings and guiding wings are provided along the circumferential direction. Then, the cleaning device has a nozzle provided on the guide vane located on the front side and the rear side of the wing, and the compressed air is jetted from the nozzle toward the wing so that dust attached to the surface of the feather is accumulated. Is blowing away.

Japanese Patent Application Laid-Open No. 30-177

  By the way, for example, in an axial flow blower having a moving blade and a stationary blade, which is used for blowing a blast furnace, dirt adheres to the moving blade and the stationary blade. If dirt adheres, the cross-sectional shape of the blade including the moving blade and the stationary blade will change from the time of new product introduction. In particular, changes in the cross-sectional shapes of the leading and trailing edges of the wing change the inflow and outflow angles at which air flows into and out of the wing, which changes the wing performance. As a result, the aerodynamic performance of the wing may be reduced.

  Then, this invention makes it a subject to provide the washing | cleaning apparatus and turbo-type fluid machine of the turbo-type fluid machine which can wash | clean the stain | pollution | contamination adhering to the moving blade suitably.

  The apparatus for cleaning a turbo type fluid machine according to the present invention comprises: a moving blade group having a plurality of moving blades arranged at predetermined intervals circumferentially around a rotation axis; and the movement in the axial direction of the rotation axis And a stator blade group provided with a plurality of stator blades provided opposite to the blade group and arranged at predetermined intervals in the circumferential direction around the rotation axis. A cleaning solution tank provided outside the turbo fluid machine for storing a cleaning solution, a cleaning solution external supply flow path for supplying the cleaning solution to the one or more stationary blades of the stationary blade group, and the cleaning solution external supply flow A cleaning solution supply pump provided in a passage for pumping the cleaning solution, a cleaning solution internal supply flow path formed inside the stator blade and connected to the cleaning solution external supply flow path, and the cleaning fluid formed in the stator blade It communicates with the internal supply channel Together, characterized in that it and a cleaning nozzle for injecting the cleaning liquid toward the moving blade group that faces the stationary blade.

  According to this configuration, since the cleaning solution can be jetted toward the moving blade group from the cleaning nozzle formed on the one or more stationary blades of the stationary blade group, the dirt adhering to the plurality of moving blades can be removed. Can. For this reason, since the aerodynamic performance of a moving blade can be returned, the fall of the work efficiency of a turbo type fluid machine can be controlled. The cleaning solution may be sprayed from the cleaning nozzle.

  Further, the cleaning nozzle is provided in a plurality at predetermined intervals in the radial direction of the stationary blade, and the cleaning solution internal supply passage is connected to the cleaning solution external supply passage on the radially outer side, and the stationary blade It is preferable that the flow passage area is formed so as to narrow from the radially outer side to the inner side in the radial direction.

  According to this configuration, the supply amount of the cleaning liquid supplied to the cleaning nozzle radially outside the stator blade and the supply amount of the cleaning liquid supplied to the cleaning nozzle radially inner of the stator blade can be the same supply amount. it can. For this reason, even in the case where a plurality of cleaning nozzles are provided in the radial direction of the stationary blade, the cleaning liquid can be uniformly supplied to the respective cleaning nozzles.

  Further, in the plurality of cleaning nozzles, the injection amount of the cleaning liquid ejected from the radially outer side and the radially inner side is larger than the injection amount of the cleaning liquid ejected from the radial direction central portion of the stator blade. It is preferred that it be formed as.

  According to this configuration, a large amount of cleaning liquid can be jetted radially outward and radially inward of the stationary blade to which the contamination easily adheres, so that the contamination attached to the moving blade can be efficiently removed. In addition, the plurality of cleaning nozzles can change the injection amount of the cleaning liquid by changing the number of arrangement or changing the diameter of the nozzles.

  Further, in the flow direction of the fluid flowing through the turbo type fluid machine, the moving blade group is provided on the upstream side, while the stationary blade group is provided on the downstream side, and the cleaning nozzle is provided Preferably, it is formed at the leading edge of the vane.

  According to this configuration, the cleaning nozzle can be formed at the front edge portion (the end portion on the upstream side) of the stationary blade. Here, since the thickness of the leading edge side of the stationary blade is larger than that of the trailing edge side, the cleaning nozzle can be easily formed. Then, the cleaning nozzle can spray the cleaning solution toward the trailing edge (the end on the trailing side) of the moving blade.

  Further, it further includes a slide cover that covers the front edge of the stationary blade on which the cleaning nozzle is formed and is movable along the front edge, and the slide cover includes the turbo fluid machine It is preferable to move to the open position which exposes the said washing | cleaning nozzle at the time of washing | cleaning, and to move to the closed position which covers the said washing | cleaning nozzle at the time of driving | operation of the said turbo type fluid machine.

  According to this configuration, by moving the slide cover to the open position, the cleaning nozzle can be exposed and the cleaning liquid can be jetted from the cleaning nozzle. On the other hand, by moving the slide cover to the closed position, the cleaning nozzle can be covered, so that it is possible to suppress the decrease in the blade performance of the stationary blade provided with the cleaning nozzle, and Adhesion can be suppressed.

  In addition, it is preferable that the outer surface of the slide cover and the outer surface of the stationary blade be flush with each other when the slide cover is moved to the closed position.

  According to this configuration, lowering the aerodynamic performance of the stationary blade to which the slide cover is attached can be further suppressed by making the slide cover and the outer surface of the stationary blade flush.

  Further, on the outer surface of the stator blade, a mating surface at the boundary between the slide cover and the stator blade is inclined from the inside to the outside of the stator blade and from the front edge to the rear edge. It is preferable that

  According to this configuration, even if a slight step is formed between the slide cover and the stator blade on the outer surface of the stator blade, the fluid flow is maintained because the mating surface is a slope. The fluid is less likely to be inhibited, and the fluid can be suitably circulated.

  Preferably, the slide cover is formed extending from the front edge of the stationary blade to a central portion between the front edge and the rear edge.

  According to this configuration, the rigidity of the slide cover can be enhanced by extending the slide cover.

  In the stator blade, the front edge portion on the front edge side on which the cleaning nozzle is formed can change the jetting direction of the cleaning nozzle, centering on a second rotation axis along the radial direction of the rotation shaft It is preferred to rotate.

  According to this configuration, since the injection direction of the cleaning nozzle can be changed, the injection direction of the cleaning liquid to the moving blades can be adjusted to an appropriate injection direction. For this reason, the dirt adhering to the moving blades can be efficiently removed.

  The turbo type fluid machine of the present invention comprises a moving blade group having a plurality of moving blades arranged at predetermined intervals circumferentially around a rotating shaft, and the moving blade group in the axial direction of the rotating shaft A stator vane group having a plurality of stator vanes provided opposite to each other and arranged at predetermined intervals in the circumferential direction around the rotation axis, and provided on one or more of the stator vanes of the stator vane group And a cleaning device of

  According to this configuration, since the cleaning liquid can be jetted toward the moving blade group from the cleaning device provided in one or more of the stationary blade groups of the stationary blade group, the dirt adhering to the plurality of moving blades can be removed. it can. For this reason, since the aerodynamic performance of a moving blade can be returned, the fall of the work efficiency of a turbo type fluid machine can be controlled.

  When the cleaning device is provided on one of the stationary blades of the stationary blade group, the cleaning device may be provided on the upper side of the plurality of stationary blades of the stationary blade group. preferable.

  According to this configuration, since the cleaning solution can be injected from the stationary blade above the stationary blade group, the injected cleaning solution flows downward. Therefore, the cleaning solution can be sprayed over a wide range.

  Further, in the case where two of the cleaning devices are provided to the two vanes of the vane group, the two cleaning devices are arranged in the horizontal direction passing through the rotation axis among the plurality of vanes of the vane group. It is preferable to provide the two vanes located on both sides of.

  According to this configuration, since the cleaning liquid can be jetted from both sides in the horizontal direction of the stator blade group, the jetted cleaning liquid can be evenly dispersed and jetted in the circumferential direction of the rotor blade group.

  Further, the moving blade group and the stationary blade group are provided in a plurality of stages and alternately arranged in the axial direction of the rotating shaft, and the cleaning device can spray the cleaning solution toward the final stage moving blade group It is preferable that the stationary blade group is provided.

  According to this configuration, since a large amount of dirt adheres to the final stage moving blade group, the final stage moving blade group can be cleaned by the cleaning device. Therefore, it is possible to not only restore the aerodynamic performance of the final stage moving blade group, but also to suppress the occurrence of surging due to the large amount of dirt adhering to the final stage moving blade group.

  Further, the moving blade group and the stationary blade group are provided in a plurality of stages and alternately arranged in the axial direction of the rotating shaft, and the cleaning device injects the cleaning solution toward the moving blade group of the first stage It is preferable that the vane group is provided.

  According to this configuration, since it is possible to clean the first stage moving blade group that affects the suction performance, not only the aerodynamic performance of the first stage moving blade group but also the suction performance is restored. Can.

FIG. 1 is a cross-sectional view of a multistage axial flow blower provided with the cleaning device according to the first embodiment. FIG. 2 is a cross-sectional view showing the cleaning apparatus according to the first embodiment. FIG. 3 is a perspective view of a stationary blade provided with the cleaning device according to the first embodiment. FIG. 4 is a cross-sectional view showing the cleaning apparatus according to the second embodiment. FIG. 5 is a cross-sectional view showing the cleaning apparatus according to the third embodiment. FIG. 6 is a perspective view of a stationary blade provided with a cleaning device according to a fourth embodiment. FIG. 7 is a cross-sectional view showing the cleaning apparatus according to the fifth embodiment. FIG. 8 is a perspective view of a stationary blade provided with the cleaning device according to the fifth embodiment. FIG. 9 is a cross-sectional view of a stationary blade provided with a cleaning device according to a sixth embodiment. FIG. 10 is a cross-sectional view of a stationary blade provided with a cleaning device according to a seventh embodiment.

  Hereinafter, embodiments according to the present invention will be described in detail based on the drawings. The present invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by persons skilled in the art or those that are substantially the same. Furthermore, the components described below can be combined as appropriate, and when there are a plurality of embodiments, it is also possible to combine each embodiment.

Embodiment 1
The turbo-type fluid machine to which the cleaning device 10 according to the first embodiment is applied is, for example, a multistage axial flow blower 1, and the multistage axial flow blower 1 includes a plurality of stages of moving blade groups and a plurality of stages of stationary blade groups. The air as the fluid is blown from the upstream side (upstream side) to the downstream side (downstream side). In the first embodiment, the turbo type fluid machine is described as being applied to the multistage axial flow blower 1, but the multistage axial flow blower 1 is not particularly limited. As a turbo type fluid machine, it may be applied to an axial flow fluid machine, a mixed flow fluid machine, for example, and may be any fluid machine having a rotor blade and a stator blade. As a turbo type fluid machine, it is applicable also to a compressor, a turbine, etc. of a gas turbine, for example.

  FIG. 1 is a cross-sectional view of a multistage axial flow blower provided with the cleaning device according to the first embodiment. FIG. 2 is a cross-sectional view showing the cleaning apparatus according to the first embodiment. FIG. 3 is a perspective view of a stationary blade provided with the cleaning device according to the first embodiment. As shown in FIG. 1, the multistage axial flow blower 1 includes a casing 2, a rotary shaft 3, a plurality of stages of moving blade groups 4, a plurality of stages of stationary blade groups 5, and a cleaning device 10.

  The casing 2 is formed in a cylindrical shape extending along the axial direction of the rotary shaft 3, and one side in the axial direction (left side in FIG. 1) is the upstream side, and the other side in the axial direction (FIG. 1) The right side of) is the wake side. Then, the casing 2 is formed to be thinner from the front to the rear so that the flow area on the front is large and the flow area on the rear is small. A flow passage through which the fluid flows is formed inside the casing 2.

  The rotating shaft 3 is provided inside the casing 2 and formed in a cylindrical shape. The rotating shaft 3 forms an annular flow passage with the casing 2. The axis of rotation of the rotating shaft 3 is horizontal, and is rotated by a power source (not shown).

  The moving blade group 4 is provided in a plurality of stages at predetermined intervals in the axial direction of the rotating shaft 3. In FIG. 1, a two-stage moving blade group 4 is illustrated. Each moving blade group 4 has a plurality of moving blades 7 provided at predetermined intervals in the circumferential direction around the rotation axis 3. The base end portions of the plurality of moving blades 7 are attached to the outer peripheral surface of the rotating shaft 3, and the tip end portions thereof face the casing 2 with a tip clearance. That is, each moving blade 7 is provided to extend radially outward from the rotation shaft 3, and the plurality of moving blades 7 are provided radially about the rotation shaft 3.

  The stator blade group 5 is provided in a plurality of stages at predetermined intervals in the axial direction of the rotation shaft 3. At this time, the plurality of stages of moving blade groups 4 and the plurality of stages of stationary blade groups 5 are alternately arranged along the axial direction of the rotation axis. In FIG. 1, three stages of stator blade groups 5 are illustrated, and the first stage (the upstream side stage) stationary blade group 5 and the second stage (the central stage) stationary blade group 5 And the first stage of the rotor blade group 4 is disposed between the second stage of the stator blade group 5 and the final stage of the stator blade group 5 of the last stage Group 4 is arranged.

  Each of the vane groups 5 has a plurality of vanes 8 provided at predetermined intervals in the circumferential direction around the rotation axis 3. The base end portions of the plurality of stator blades 8 are attached to the inner peripheral surface of the casing 2, and the tip end portions thereof face the rotation shaft 3 with a gap. That is, each stationary blade 8 is provided to extend radially inward from the casing 2, and the plurality of stationary blades 8 are provided radially about the rotation axis 3.

  In the multistage axial flow blower 1 as described above, when the rotary shaft 3 is rotated by a power source (not shown), the plurality of stages of moving blade groups 4 rotate in the circumferential direction to suck air from the front flow side of the casing 2. The air drawn in from the upstream side passes through an annular flow passage formed inside the casing 2. For this reason, the air passing through the annular flow passage is pressurized by passing the plurality of stages of moving blade groups 4 and stationary blade groups 5, and the pressurized air is delivered from the downstream side of the casing 2 .

  Next, the cleaning apparatus 10 will be described with reference to FIGS. 2 and 3. The cleaning device 10 is provided on at least one vane 8 of the vane group 5. In the first embodiment, a case where one stator vane 8 of the final stage stator vane group 5 is provided will be described.

  As shown in FIG. 2, the cleaning device 10 provided on one stator blade 8 of the final stage stator blade group 5 is to move to the final stage rotor blade group 4 on the upstream side facing the final stage stator blade group 5. Direct the spray of cleaning solution. The cleaning device 10 is provided on the stationary blade 8 on the upper side of the final-stage stationary blade group 5, and the cleaning solution tank 11, the cleaning solution external supply passage 12, the cleaning solution supply pump 13, and the cleaning solution internal supply passage And a cleaning nozzle 15.

  The cleaning solution tank 11 is provided outside the casing 2 of the multistage axial flow blower 1 and stores the cleaning solution.

  The cleaning liquid external supply flow path 12 is provided outside the casing 2 of the multistage axial flow blower 1, and connects the cleaning liquid tank 11 and the cleaning liquid internal supply flow path 14 formed inside the casing 2, and the cleaning liquid is It is a flowing channel.

  The cleaning liquid supply pump 13 is provided in the cleaning liquid external supply flow path 12 and pumps the cleaning liquid from the cleaning liquid tank 11 toward the cleaning liquid internal supply flow path 14.

  The cleaning liquid internal supply flow path 14 is formed inside the stationary blade 8. The cleaning liquid inner supply flow path 14 is formed at the front edge 8 a of the stationary blade 8 and is formed extending in the radial direction of the stationary blade 8. The cleaning liquid external supply flow path 12 is connected to the radial outer end of the cleaning liquid internal supply flow path 14, and the cleaning liquid flowing through the cleaning liquid external supply flow path 12 flows into the cleaning liquid internal supply flow path 14. .

  The cleaning nozzle 15 is formed at the front edge 8 a of the stationary blade 8, and a plurality of cleaning nozzles 15 are provided at predetermined intervals in the radial direction. Further, each cleaning nozzle 15 is formed by drilling in the direction orthogonal to the radial direction from the outer surface of the front edge portion 8 a of the stationary blade 8 toward the cleaning solution inner supply flow channel 14. Here, as shown in FIG. 3, the vane 8 is formed so that the thickness between the dorsal side and the ventral side on the front edge side is thicker than the thickness between the dorsal side and the ventral side on the rear edge side It is done. The back side of the stationary blade 8 is a low pressure side convex outward in the circumferential direction, and the ventral side of the stationary blade 8 is a high pressure side concave outward in the circumferential direction. For this reason, the front edge portion 8 a of the stationary blade 8 has a size capable of forming the cleaning solution inner supply flow passage 14 and the cleaning nozzle 15. 2 and 3, for example, five cleaning nozzles 15 are illustrated. The plurality of cleaning nozzles 15 are formed to spray the cleaning solution toward the trailing edge of the rotor blade group 4, and the cleaning solutions ejected from the respective cleaning nozzles 15 are sprayed in the form of a spray. The plurality of cleaning nozzles 15 are in communication with the cleaning liquid internal supply flow path 14, and the cleaning liquid flowing through the cleaning liquid internal supply flow path 14 is supplied.

  The cleaning device 10 configured as described above is used at the time of periodic inspection of the multistage axial flow blower 1, and injects a cleaning solution toward the rotating blade group 4 of the final stage which rotates while rotating the rotary shaft 3. Specifically, the cleaning device 10 pumps the cleaning solution from the cleaning solution tank 11 by driving the cleaning solution supply pump 13 and causes the cleaning solution that has been pumped up to flow from the cleaning solution tank 11 to the cleaning solution external supply flow path 12. The cleaning liquid flowing through the cleaning liquid external supply flow path 12 flows into the cleaning liquid internal supply flow path 14, flows through the cleaning liquid internal supply flow path 14, and is then supplied to the cleaning nozzle 15. The cleaning liquid supplied to the cleaning nozzle 15 is sprayed from the cleaning nozzle 15 toward the rear edge of the blade group 5.

  As described above, according to the first embodiment, since the cleaning nozzle 15 formed on one stationary blade 8 of the stationary blade group 5 can spray the cleaning liquid toward the rear edge portion of the moving blade group 4 The stain attached to the plurality of moving blades 7 can be removed. For this reason, since the aerodynamic performance of the moving blade 7 can be restored, it is possible to suppress a decrease in work efficiency of the multistage axial flow blower 1.

  Further, according to the first embodiment, the cleaning nozzle 15 and the cleaning liquid internal supply flow path 14 can be easily formed in the front edge portion 8a of the stationary blade 8 whose thickness on the front edge side is thicker than the rear edge side. .

  Further, according to the first embodiment, since the cleaning solution can be sprayed from the stationary blade 8 on the upper side of the stationary blade group 5, the sprayed cleaning solution flows toward the lower side, so the cleaning solution is sprayed over a wide range. be able to.

  Further, according to the first embodiment, the rotor blade group 4 of the final stage can be cleaned by the cleaning device 10. For this reason, it is possible to not only restore the aerodynamic performance of the final stage moving blade group 4 but also suppress the occurrence of surging due to the large amount of dirt adhering to the final stage moving blade group 4.

  In addition, in Embodiment 1, although the washing | cleaning apparatus 10 was provided in one stator blade 8 of the upper side of the stator blade group 5, it is not limited to this structure. The cleaning device 10 may be provided on the two vanes 8 of the vane group 5, in which case it is preferable that the two cleaning devices 10 be provided on the vanes 8 on both sides in the horizontal direction passing through the rotation shaft 3 . According to this configuration, since the cleaning solution can be injected from the stationary blades 8 on both sides in the horizontal direction of the stationary blade group 5, the injected cleaning solution can be evenly dispersed and injected in the circumferential direction of the moving blade group 4 .

  Moreover, in Embodiment 1, although the washing | cleaning apparatus 10 was provided in the stator blade group 5 of the last stage which can inject a washing | cleaning liquid toward the rotor blade group 4 of the last stage, it is not limited to this structure. The cleaning device 10 may be provided to the second stage of the stator blade group 5 capable of injecting the cleaning liquid toward the first stage of the blade group 4. According to this configuration, since the first stage moving blade group 4 that affects the suction performance of the multistage axial flow blower 1 can be cleaned, the aerodynamic performance of the first stage moving blade group 4 is restored. Instead, the suction performance of the multistage axial flow blower 1 can be restored.

  Furthermore, in the first embodiment, the cleaning device 10 is provided at the front edge 8 a of the stationary blade 8, but is not limited to this configuration. The cleaning device 10 may be provided at the trailing edge 8 c of the stationary blade 8. In this case, the cleaning device 10 is directed to the downstream side rotor blade group 4 of the stationary blade group 5 provided with the cleaning device 10. Inject That is, the cleaning nozzle 15 of the cleaning apparatus 10 and the cleaning solution internal supply flow path 14 are formed at the trailing edge 8 c of the stationary blade 8, and the cleaning solution is injected to the leading edge of the rotor blade group 4 on the trailing side.

Second Embodiment
Next, with reference to FIG. 4, the cleaning device 20 according to the second embodiment will be described. FIG. 4 is a cross-sectional view showing the cleaning apparatus according to the second embodiment. In addition, in the second embodiment, in order to avoid redundant description, portions different from the first embodiment will be described, and portions having the same configuration as the first embodiment will be described with the same reference numerals.

  In the cleaning device 20 of the second embodiment, the cleaning liquid internal supply flow passage 14 of the cleaning device 10 of the first embodiment has a different flow passage area in the radial direction of the rotating shaft 3.

  As shown in FIG. 4, the cleaning liquid internal supply flow channel 14 is formed to extend in the radial direction, and the flow passage area is formed so as to narrow from the radial outer side to the radial inner side. That is, the cleaning solution internal supply flow passage 14 is formed such that the flow passage area S1 on the outer side in the radial direction is large and the flow passage area S2 on the inner side in the radial direction is small.

  As described above, according to the second embodiment, the supply amount of the cleaning liquid supplied to the cleaning nozzle 15 on the radially outer side of the stator blade 8 and the supply amount of the cleaning liquid supplied to the cleaning nozzle 15 on the radial inside of the stator blade 8 And the same supply amount. Therefore, even when the plurality of cleaning nozzles 15 are provided in the radial direction of the stationary blade 8, the cleaning liquid can be uniformly supplied to the respective cleaning nozzles 15.

Third Embodiment
Next, with reference to FIG. 5, the cleaning device 30 according to the third embodiment will be described. FIG. 5 is a cross-sectional view showing the cleaning apparatus according to the third embodiment. Also in the third embodiment, in order to avoid redundant description, portions different from the first and second embodiments will be described, and portions having the same configuration as the first and second embodiments will be described with the same reference numerals.

  In the cleaning device 30 according to the third embodiment, the injection amount of the cleaning liquid ejected from the radially outer side and the radially inner side is larger than the injection amount of the cleaning liquid ejected from the radial direction central portion of the stationary blade 8 .

  As shown in FIG. 5, the number of the plurality of cleaning nozzles 15 formed in the radial direction central portion of the vane 8 is small, and the number formed in the radially outer side and the radially inner side of the vane 8 is increased. There is. That is, the plurality of cleaning nozzles 15 have a coarse-dense distribution in the radial direction of the stationary blade 8, the central portion in the radial direction is rough, and the radial outer side and the radial inner side are dense.

  As described above, according to the third embodiment, since a large amount of cleaning liquid can be jetted radially outward and radially inward of the stationary blade 8 to which the contamination easily adheres, the contamination attached to the moving blade 7 can be efficiently removed. can do.

  In the third embodiment, the distribution of the injection amount of the cleaning liquid in the radial direction of the stationary blade 8 is made to be coarse and dense by changing the arrangement number of the plurality of cleaning nozzles 15. However, the present invention is not limited to this configuration. By changing the diameters of the plurality of cleaning nozzles 15, the distribution of the injection amount of the cleaning liquid may be made coarse and dense.

Fourth Embodiment
Next, the cleaning device 40 according to the fourth embodiment will be described with reference to FIG. FIG. 6 is a perspective view of a stationary blade provided with a cleaning device according to a fourth embodiment. Also in the fourth embodiment, in order to avoid redundant description, parts different from the first to third embodiments will be described, and parts having the same configuration as the first to third embodiments will be described with the same reference numerals.

  In the cleaning device 40 of the fourth embodiment, the rotation direction of the front edge 8 a of the stationary blade 8 can change the injection direction of the cleaning liquid ejected from the cleaning nozzle 15.

  As shown in FIG. 6, the stator blade 8 has a front edge 8a, a rear edge 8c, and a central portion 8b between the front edge 8a and the rear edge 8c, and the central portion 8b and the rear The front edge 8a is separately formed while the edge 8c is integrally formed. The front edge portion 8 a is formed in a cylindrical shape in which the radial direction of the rotation shaft 3 is the axial direction of the rotation shaft (second rotation shaft) 41. The front edge 8 a is pivotable about the pivot shaft 41.

  In the cleaning device 40, the cleaning liquid internal supply flow path 14 is formed to extend along the pivot shaft 41 at the front edge 8 a of the stationary blade 8. Further, in the cleaning device 40, a plurality of cleaning nozzles 15 are formed at the front edge 8a of the stationary blade 8 as in the first embodiment, and the cleaning solution internal supply flow path from the outer surface of the front edge 8a of the stationary blade 8 It is formed by drilling in a direction orthogonal to the radial direction toward 14. For this reason, when the front edge portion 8a of the stationary blade 8 pivots about the pivot shaft 41, the jetting direction of the plurality of washing nozzles 15 is changed. In addition, rotation of the front edge part 8a may rotate by the motive power from the motive power source which is not shown in figure, may rotate manually, and is not specifically limited.

  As described above, according to the fourth embodiment, since the injection direction of the cleaning nozzle 15 can be changed, the injection direction of the cleaning liquid to the moving blade 8 can be adjusted to an appropriate injection direction. Therefore, the dirt adhering to the moving blades 8 can be efficiently removed.

Fifth Embodiment
Next, the cleaning device 50 according to the fifth embodiment will be described with reference to FIGS. 7 and 8. FIG. 7 is a cross-sectional view showing the cleaning apparatus according to the fifth embodiment. FIG. 8 is a perspective view of a stationary blade provided with the cleaning device according to the fifth embodiment. Also in the fifth embodiment, in order to avoid overlapping descriptions, parts different from the first to fourth embodiments will be described, and parts having the same configuration as the first to fourth embodiments will be described with the same reference numerals.

  The cleaning device 50 of the fifth embodiment is configured such that the cleaning device 10 of the first embodiment further includes a slide cover 51 that covers the front edge portion 8 a of the stationary blade 8.

  As shown in FIGS. 7 and 8, the slide cover 51 of the cleaning device 50 moves along the front edge 8a of the stationary blade 8 in the radially outward opening direction and the radially inward closing direction. It is freely provided. The slide cover 51 is formed in an arc shape whose cross-sectional shape is U-shaped. The front edge portion 8a of the stationary blade 8 covered by the slide cover 51 is formed with a cover accommodating portion 52 for accommodating the slide cover 51, and the cover accommodating portion 52 is a stationary vane as compared to the other stationary vanes 8. A front edge portion 8a of 8 is formed so as to be recessed inwardly over the entire area in the radial direction.

  The slide cover 51 moves to the open position where the plurality of cleaning nozzles 15 are exposed by moving in the opening direction. On the other hand, the slide cover 51 moves to the closed position covering the plurality of cleaning nozzles 15 by moving in the closing direction. Here, the slide cover 51 is accommodated in the cover accommodating portion 52, and in the state of being moved to the closed position, the outer surface of the slide cover 51 and the outer surface of the stationary blade 8 are flush with each other.

  Further, a cover insertion hole 53 through which the slide cover 51 is inserted is formed through the casing 2 of the multistage axial flow blower 1. The slide cover 51 can move in the opening direction and the closing direction by being taken in and out of the cover insertion hole 53. The slide cover 51 may be moved by power from a power source (not shown) or may be moved manually, and is not particularly limited.

  As described above, according to the fifth embodiment, by moving the slide cover 51 to the open position, the cleaning nozzle 15 can be exposed, and the cleaning nozzle 15 can eject the cleaning liquid. On the other hand, by moving the slide cover 51 to the closed position, the cleaning nozzle 15 can be covered, so that it is possible to suppress a drop in blade performance of the stationary blade 8 on which the cleaning nozzle 15 is provided. It is possible to suppress the adhesion of stains to 15.

  Further, according to the fifth embodiment, by making the slide cover 51 and the outer surface of the stationary blade 8 flush with each other, it is possible to further suppress the decrease in aerodynamic performance of the stationary blade 8 to which the slide cover 51 is attached.

Sixth Embodiment
Next, the cleaning device 60 according to the sixth embodiment will be described with reference to FIG. FIG. 9 is a cross-sectional view of a stationary blade provided with a cleaning device according to a sixth embodiment. Also in the sixth embodiment, in order to avoid overlapping descriptions, parts different from the first to fifth embodiments will be described, and parts having the same configuration as the first to fifth embodiments will be described with the same reference numerals.

  The cleaning device 60 of the sixth embodiment is configured such that the mating surface P of the slide cover 51 of the cleaning device 50 of the fifth embodiment and the step portion 52a of the cover housing portion 52 of the stationary blade 8 is a slope.

  As shown in FIG. 9, on the outer surface of the stationary blade 8, the slide cover 51 and the stationary blade 8 abut on each other at the back and ventral boundary L. The mating surface P at the boundary L is a surface in which both end surfaces of the arc-shaped slide cover 51 are in contact with both side surfaces of the cover accommodating portion 52 formed at the front edge portion 8 a of the stationary blade 8. The mating surface P is an inclined surface that is inclined from the front edge to the rear edge from the inside to the outside of the stationary blade 8.

  As described above, according to the sixth embodiment, even in the case where a slight step is formed between the slide cover 51 and the vane 8 on the outer surface of the vane, the mating surface P becomes a slope. Thus, the flow of fluid is less likely to be impeded, and the fluid can be suitably flowed.

Seventh Embodiment
Next, with reference to FIG. 9, a cleaning apparatus 70 according to a seventh embodiment will be described. FIG. 10 is a cross-sectional view of a stationary blade provided with a cleaning device according to a seventh embodiment. Also in the seventh embodiment, in order to avoid redundant description, parts different from the first to sixth embodiments will be described, and parts having the same configuration as the first to sixth embodiments will be described with the same reference numerals.

  In the cleaning device 70 of the seventh embodiment, both ends of the slide cover 51 of the cleaning device 50 of the fifth embodiment are formed extending as compared with the fifth embodiment.

  As shown in FIG. 10, the slide cover 51 is formed extending from the front edge 8a of the stationary blade 8 to the central portion 8b between the front edge 8a and the rear edge 8c. That is, since both ends of the arc-shaped slide cover 51 are formed to reach the central portion 8 b of the stationary blade 8, the slide cover 51 passes from the central portion 8 b on the back side to the ventral side via the front edge portion 5 a The central portion 8b of the

  As described above, according to the seventh embodiment, by forming the slide cover 51 so as to extend from the front edge portion 8a to the central portion 8b, the rigidity of the slide cover 51 can be enhanced.

Reference Signs List 1 multistage axial flow blower 2 casing 3 rotating shaft 4 blade group 5 vane group 7 blade 8 vane 8a vane leading edge 8b vane central portion 8c vane trailing edge 10 cleaning device 11 cleaning solution tank 12 cleaning liquid external supply flow path 13 cleaning liquid supply pump 14 cleaning liquid internal supply flow path 15 cleaning nozzle 20 cleaning device (second embodiment)
30 Cleaning Device (Third Embodiment)
40 Cleaning Device (Embodiment 4)
41 rotation shaft 50 cleaning device (fifth embodiment)
51 slide cover 52 cover accommodating portion 52a stepped portion 53 cover insertion hole 60 cleaning device (sixth embodiment)
70 Cleaning Device (Embodiment 7)
S1 channel area S2 channel area L boundary P mating surface

Claims (13)

A moving blade group having a plurality of moving blades arranged at predetermined intervals in a circumferential direction around a rotating shaft, and the moving blade group being provided in the axial direction of the rotating shaft, the rotating shaft And a stator blade group having a plurality of stator blades arranged at predetermined intervals circumferentially around the center of the turbo fluid machine,
A cleaning solution tank provided outside the turbo fluid machine for storing a cleaning solution;
A cleaning solution external supply flow path for supplying the cleaning solution to one or more of the stationary blades of the stationary blade group;
A cleaning solution supply pump provided in the cleaning solution external supply flow path for pressure-feeding the cleaning solution;
A cleaning liquid internal supply flow path formed inside the stator blade and connected to the cleaning liquid external supply flow path;
A cleaning nozzle formed on the stationary blade, communicating with the cleaning solution internal supply flow path, and injecting the cleaning solution toward the moving blade group facing the stationary blade ;
A plurality of the cleaning nozzles are provided at predetermined intervals in the radial direction of the stationary blade,
The plurality of cleaning nozzles are configured such that the injection amount of the cleaning liquid injected from the radially outer side and the radially inner side is larger than the injection amount of the cleaning liquid injected from the radial center portion of the stationary blade. A washing device for a turbo-type fluid machine, characterized in that it is formed . Before SL cleaning liquid inside the supply passage, the radially outward is connected cleaning liquid outside the supply passage, said that the static flow area toward the radially outer side radially inward of the blade is formed to be narrower The apparatus for cleaning a turbo-type fluid machine according to claim 1, characterized in that: In the flow direction of the fluid flowing through the turbo type fluid machine, the moving blade group is provided on the upstream side, while the stationary blade group is provided on the downstream side.
The said washing | cleaning nozzle is formed in the front edge part of the said stator blade, The washing | cleaning apparatus of the turbo-type fluid machine of Claim 1 or 2 characterized by the above-mentioned. It further comprises a slide cover that covers the front edge of the stationary blade on which the cleaning nozzle is formed and is movable along the front edge.
The slide cover moves to an open position for exposing the washing nozzle during washing of the turbo fluid machine, and moves to a closed position covering the washing nozzle during operation of the turbo fluid machine. The washing | cleaning apparatus of the turbo-type fluid machine of Claim 3 characterized by these. 5. The turbo type fluid machine according to claim 4 , wherein the outer surface of the slide cover is flush with the outer surface of the stationary blade when the slide cover is moved to the closed position. apparatus. On the outer surface of the stationary blade, the mating surface at the boundary between the slide cover and the stationary blade is a slope which is inclined from the front edge to the rear edge from the inside to the outside of the stationary blade. The washing | cleaning apparatus of the turbo-type fluid machine of Claim 4 or 5 characterized by the above-mentioned. Said slide cover is either from the front edge portion of the vane, the front to the center portion between the edge and the trailing edge, from claim 4, characterized in that it is formed to extend 6 A washing apparatus for a turbo-type fluid machine according to any one of the preceding claims. The stationary blade rotates about a second rotation axis along the radial direction of the rotation shaft so that the front edge portion on the front edge side on which the cleaning nozzle is formed can change the injection direction of the cleaning nozzle The washing | cleaning apparatus of the turbo-type fluid machine of any one of Claim 3 to 7 characterized by the above-mentioned. A moving blade group having a plurality of moving blades disposed at predetermined intervals circumferentially around a rotation axis;
A stator vane group having a plurality of stator vanes provided so as to face the rotor blade group in the axial direction of the rotary shaft, and arranged at predetermined intervals circumferentially around the rotary shaft;
The washing | cleaning apparatus of any one of Claim 1 to 8 provided in the one or more said stator blades of the said stator blade group, The turbo-type fluid machine characterized by the above-mentioned. When the cleaning device is provided on one of the stationary blades of the stationary blade group,
The turbo type fluid machine according to claim 9 , characterized in that the cleaning device is provided to the upper stationary vane among the plurality of stationary vanes of the stationary vane group. In the case of providing two of the cleaning devices to the two vanes of the vane group,
Two of the cleaning apparatus, among a plurality of the vanes of the vane groups, according to claim 9, characterized in that provided on two of the vanes located on both sides in the horizontal direction passing through the rotation axis Turbo type fluid machine. The moving blade group and the stationary blade group are provided in a plurality of stages and alternately arranged in the axial direction of the rotating shaft,
The turbo type fluid machine according to any one of claims 9 to 11 , wherein the cleaning device is provided to the stationary blade group capable of injecting the cleaning solution toward the final stage moving blade group. . The moving blade group and the stationary blade group are provided in a plurality of stages and alternately arranged in the axial direction of the rotating shaft, and the cleaning device can spray the cleaning solution toward the moving blade group of the first stage The turbo type fluid machine according to any one of claims 9 to 11 , wherein the turbo fluid machine is provided in the stator blade group.

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