JP6238441B2 - Deposit removing device and axial flow rotating machine - Google Patents

Description

  The present invention relates to a deposit removing device and an axial flow rotary machine.

  For example, a rotary machine such as an axial flow fan is formed on a casing that forms an annular flow path, a rotating shaft that rotates inside the casing, a moving blade that is fixed to the rotating shaft and rotates together with the rotating shaft, and an inner surface of the casing. And stationary blades alternately arranged with the moving blades in the direction of the rotation axis. A rotary machine such as an axial flow type blower forms an annular flow path inside a casing, and pumps air flowing into the annular flow path by a moving blade. Such rotary machines such as axial-flow type blowers have a large surface roughness due to adhesion of solid matter such as dust in the air to the blade surface and blade edge of the moving blade. It may cause performance degradation. Therefore, in order to maintain the performance of a rotary machine such as an axial flow fan, it is necessary to periodically remove the blade surface and blade edge deposits of the moving blade.

  For example, a device disclosed in Patent Document 1 is known as an apparatus for removing deposits on the blade surface and blade edge of a rotating blade of a rotary machine. This apparatus includes a brush-like deposit removing member inserted from a through hole provided in the casing. And the deposit | attachment removal member contacts the front edge part of the moving blade which rotates with a rotating shaft, and the deposit | attachment of the blade edge and blade surface of a moving blade is removed.

Japanese Patent Laid-Open No. 3-206400

  However, since the stationary blade of the rotating machine does not rotate together with the rotating shaft, the apparatus for removing adhering matter on the blade surface described in Patent Document 1 uses the rotation of the rotating machine to remove the adhered matter attached to the stationary blade. It cannot be removed efficiently.

  Moreover, when it is going to remove the deposit | attachment of a rear edge part instead of the front edge part of a moving blade, it is necessary to reinsert the deposit removal member in the location corresponding to the said rear edge part, and an operation | work becomes complicated. .

  The present invention has been made in view of such a problem, and is a deposit removing device capable of efficiently removing deposits on blades of a rotary machine, and an axial flow including the deposit removing device. An object is to provide a rotating machine.

The deposit removing apparatus as one aspect according to the invention for achieving the above object includes a plurality of blade bodies extending radially from an axis, and the first blade group and the second blade group that rotate relative to each other about the axis. A first attached matter removing portion that is provided on at least one of the wing bodies of the first wing group, extends toward the wing body of the second wing group, and slidably contacts the wing body of the second wing group; A cover that covers a wing body of the first blade group, and the first deposit removing part is provided on an outer surface of the cover .

According to the deposit removing apparatus having such a feature, the first deposit removing unit provided on the blade body of the first blade group is rotated by the relative rotation of the first blade group and the second blade group. Slidably contact a plurality of blades of the two blade group sequentially. Further, when the first blade group is rotated and the second blade group is stationary, the first blade group is stationary and the second blade group is rotating. The first deposit removal unit sequentially corrects the plurality of wing bodies.
Further, the first deposit removal part can be easily provided on the blade body of the first blade group. Further, it is not necessary to adjust the position when attaching the deposit removing member to the wing body, and it is possible to avoid complicated installation work.

  Moreover, the said deposit | attachment removal apparatus WHEREIN: Said 1st deposit | attachment removal part may be movable to the radial direction of the said axis line with respect to the said cover.

  With the above configuration, if the first deposit removal part is moved in the radial direction with respect to the cover when the first blade group and the second blade group rotate relative to each other, the deposit from the blade body of the second blade group The removal effect can be improved. Moreover, even if the dimension of the radial direction of a 1st deposit removal part is short, this 1st adhesion removal part can be slidably contacted to the whole blade height direction of a wing | blade body.

  Further, the deposit removing device is provided on the cover, and an outer peripheral surface thereof is in contact with an inner surface of a casing surrounding the first blade group and the second blade group, so that the first blade group around the axis line is provided. A roller that rotates about the central axis with rotation, a first end portion is pivotally connected to the first deposit removal portion, and a second end portion opposite to the first end portion is A link member that is eccentric from the central axis of the roller and is rotatably connected to the roller.

  With the above configuration, when the first blade group rotates about the axis, the roller provided on the cover rotates along the inner surface of the casing. Accordingly, one end of the link member that is eccentrically connected from the central axis of the roller rotates eccentrically about the central axis of the roller. Thereby, since the other end of the link member reciprocates in the radial direction of the axis, the first deposit removing part connected to the other end similarly reciprocates in the radial direction of the axis with respect to the cover.

  Furthermore, the said deposit | attachment removal apparatus may be provided with the 2nd deposit removal part which slidably contacts the wing | blade body of said 1st blade group on the inner surface of the said cover.

  With the above configuration, when the cover is attached to the wing body, the second attached matter removing portion provided on the inner surface of the cover is in sliding contact with the wing body.

  An axial-flow rotating machine according to the present invention includes a first blade group and a second blade group that have a plurality of blade bodies extending radially from an axis and that rotate relative to each other about the axis, and the first blade group and the second blade. A casing disposed so as to surround the group, and any one of the above deposit removing devices.

  Such an axial-flow rotating machine is also provided with any of the above deposit removal devices, so that deposits attached to the blades of the moving blade and the stationary blade can be removed.

  In the present invention, the adhering substance removing unit sequentially contacts the plurality of blade bodies of the second blade group, so that the adhering substances adhering to the blade body of the rotating machine can be efficiently removed.

It is a meridian plane sectional view containing the axis in the axial flow rotary machine of a first embodiment concerning the present invention. It is meridional sectional drawing of the deposit | attachment removal apparatus which concerns on 1st embodiment of this invention. It is sectional drawing orthogonal to the radial direction of the moving blade to which the deposit | attachment removal apparatus in the axial flow rotary machine of 1st embodiment which concerns on this invention was attached, and this moving blade. It is a figure explaining the attachment procedure of the deposit | attachment removal apparatus in the axial flow rotary machine which concerns on 1st embodiment of this invention. It is a schematic cross section orthogonal to the axis line of the axial flow rotary machine which concerns on 2nd embodiment which concerns on this invention. It is meridional sectional drawing of the deposit | attachment removal apparatus which concerns on 3rd embodiment which concerns on this invention.

<First embodiment>
Hereinafter, an axial-flow rotating machine and a deposit removing device according to a first embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, the axial-flow rotating machine 1 of this embodiment is an axial-flow type blower, for example. The axial-flow rotating machine 1 includes a cylindrical casing 2 that extends along an axis O, a rotating shaft 3 that rotates around the axis O inside the casing 2, and a rotating shaft 3 that is fixed to the rotating shaft 3 and rotates together with the rotating shaft 3. A moving blade (blade body) 4, a stationary blade (blade body) 5 that is formed on the inner surface of the casing 2 and is alternately arranged with the moving blade 4 in the direction of the axis O, and an attachment provided on the moving blade 4 And a kimono removing device 6.

  The casing 2 is formed of a substantially cylindrical member having high airtightness in order to form an annular flow path of gas to be pumped between the casing 2 and the rotary shaft 3. The casing 2 is provided with an inspection hole 10 that is accessible to the inner surface of the casing 2 and an inspection lid 11 that closes the inspection hole 10 and can maintain airtightness. In the present embodiment, the inspection hole 10 and the inspection lid 11 are provided at the same position in the axis O direction with respect to the specific moving blade 4.

  The rotating shaft 3 has a cylindrical shape extending along the axis O, and is rotated around the axis O by a power source such as an electric motor (not shown).

  The moving blade 4 is a wing body that extends radially outward from the rotating shaft 3. A plurality of the moving blades 4 are arranged radially at intervals in the circumferential direction at the same position in the axis O direction to form a moving blade group (first blade group). A plurality of such blade groups are arranged at intervals in the axis O direction. These rotor blades 4 pump the gas inside the annular flow path by rotating around the axis O as the rotating shaft 3 rotates.

The stationary blade 5 is a blade body that extends radially inward from the inner surface of the casing 2. The stationary blades 5 are arranged radially at intervals in the circumferential direction at the same position in the direction of the axis O to form a stationary blade group (second blade group). A plurality of such stationary blade groups are arranged alternately with the moving blade groups at intervals in the axis O direction. These stationary blades 5 rectify the fluid flowing inside the annular flow path and send it to the moving blades.
Due to the operation of the axial-flow rotating machine 1, for example, as shown in FIG. 3, solid matter such as dust in the air adheres to the stationary blade 5 as a deposit S on the blade surface and blade edge. In order to remove the deposit, the deposit removing device 6 is used.

As shown in FIGS. 2 and 3, the deposit removing device 6 includes a cover 6a that covers the moving blade 4, and a first deposit removing portion 6b provided on the outer surface of the cover 6a.
The cover 6a may have any shape or material that does not easily come off the blade body of the moving blade 4 when removing the deposit S. For example, a metal or resin whose inner surface is formed along the shape of the blade body of the moving blade 4 Etc. are formed.

  The first deposit removal part 6b is provided on the outer surface of the cover 6a, and extends toward the stationary blade 5 adjacent to the one side and the other side in the axis O direction. Thereby, the 1st deposit removal part 6b can be slidably contacted to the stationary blade 5 on one side and the other side in the axial direction. The first deposit removing part 6 b is, for example, a brush-like member, and the tip of the moving blade 4 rotates about the axis O together with the rotating shaft 3 so that the tip thereof is in sliding contact with the stationary blade 5. In the present embodiment, the first deposit removing part 6b is provided toward both the stationary blades 5 on one side and the other side in the axis O direction. It may be provided so as to extend only toward the wing 5.

  Next, the procedure in the case of removing the deposit S attached to the stationary blade 5 using the deposit removing device 6 of the present embodiment will be described with reference to FIG.

  When removing the deposit S, first, the operation of the axial-flow rotating machine 1 is stopped, and then the inspection lid 11 installed in the inspection hole 10 of the casing is removed as shown in FIG.

  Thereafter, as shown in FIG. 4B, the deposit removing device 6 is inserted into the casing 2 through the inspection hole 10. Then, as shown in FIG. 4 (c), the deposit removing device 6 is attached to the moving blade 4 so that the cover 6 a covers the outer surface of the moving blade 4 inside the casing 2. At this time, the deposit removing device 6 inserted into the casing 2 may be one so as to be attached only to one moving blade 4 of one moving blade group, or a plurality of attached blade removing devices 6 of the one moving blade group. A plurality of the blades may be attached to the moving blade 4. That is, when removing the deposit S using a plurality of deposit removing devices 6, the deposit removing device 6 is attached to each of the plurality of moving blades 4 of one moving blade group.

  Next, as shown in FIG. 4 (d), the inspection hole 10 is closed by the inspection lid 11 after attaching the deposit removing device 6 to the blade body of the moving blade 4. Then, by rotating the rotating shaft 3 thereafter, the first deposit removing part 6b provided in the deposit removing device 6 sequentially comes into sliding contact with the respective stationary blades 5 of the stationary blade group adjacent in the axis O direction. Thereby, the deposits S of the stationary blades 5 are removed.

As described above, since the deposit removing device 6 of the present embodiment includes the cover 6a that covers the blade body of the moving blade 4, the deposit removing device 6 is attached to the moving blade 4 when the deposit S is removed. Only by doing, the deposit | attachment adhering to the stationary blade 5 can be removed. Therefore, it is possible to easily remove the deposits without requiring complicated work.
Further, when the deposit removing device 6 is mounted on the blade body of the moving blade 4, the first deposit removing portion 6b is in sliding contact with the stationary blade 5 adjacent in the axis O direction. The deposit S can be removed without separately performing complicated operations such as alignment.

<Second embodiment>
Next, a second embodiment axis of the present invention will be described with reference to FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.
The deposit removal device 60 of the second embodiment is different from the first embodiment in that the first deposit removal unit 60b moves with the rotation of the rotary shaft 3.

The deposit removing device 60 of the present embodiment includes a cover 60a, a first deposit removing section 60b, a roller support section 7a, a roller 7, and a link member 8.
The cover 60a has the same configuration as the cover 6a of the first embodiment.
The first deposit removing part 60b is provided on the outer surface of the cover 6a so as to be slidable in the radial direction of the axis O with respect to the cover 6a. That is, the first deposit removal part 60b can be moved to an arbitrary position in the radial direction within the radial dimension of the cover 6a.

  The roller support portion 7a is a member fixed to the cover 60a, and is provided so as to protrude in a direction orthogonal to both the radial direction and the axis O direction from the radially outer tip of the cover 60a.

The roller 7 is a disk-like member supported at the end of the roller support portion 7a opposite to the cover 60a side. The roller 7 is provided on the roller support portion 7a so as to be rotatable about an axis parallel to the axis O as a central axis. The outer peripheral surface of the roller 7 is in contact with the inner surface of the casing 2 having a circular cross section perpendicular to the axis O.
The roller 7 does not necessarily have to be a disk. For example, the roller 7 may be a disk whose distance from the center to the circumference is not constant, such as an ellipse, or may be many as long as the inner surface of the casing 2 is not damaged. A square board may be used.

The link member 8 is a rod-shaped member. The first end of the link member 8 is connected to the radially inner end of the first deposit removal part so as to be rotatable about an axis parallel to the axis O. Further, the second end portion of the link member 8 opposite to the first end portion is located at an eccentric position with respect to the roller 7 from the central axis thereof, and is around an axis parallel to the central axis of the roller 7, that is, the axis O It is connected so as to be rotatable around an axis parallel to the.
The link member 8 is provided so as not to interfere with the roller support portion 7a and the central axis of the roller 7 when the rotary shaft 3 rotates.

  In the deposit removing device 60 according to the present embodiment, the rotating shaft 3 rotates when the deposit S is removed, so that the roller 7 provided on the cover 60 a also rotates along the inner surface of the casing 2. Accordingly, the second end portion of the link member 8 connected eccentrically from the central axis of the roller 7 rotates around the central axis of the roller 7. Thereby, since the link member 8 reciprocates in the radial direction, the deposit removing part 60 b connected to the first end of the link member 8 also reciprocates in the radial direction of the axis with respect to the cover 60.

  As described above, in the deposit removing device 60 of the second embodiment, the deposit removing unit 60b reciprocates in the radial direction of the axis, so that the deposit removing unit 60b can reach the entire blade height of the stationary blade 5. It will be in sliding contact. Thereby, the removal effect of the deposit | attachment S can further be heightened compared with the deposit | attachment removal apparatus 6 of 1st embodiment.

<Third embodiment>
A third embodiment of the present invention will be described with reference to FIG.
The third embodiment is different from the first and second embodiments in that a second deposit removing portion 600c is further provided on the inner surface of the cover 600a constituting the deposit removing device 600.

That is, the deposit removal apparatus 600 of this embodiment includes a cover 600a, a first deposit removal unit 600b, and a second deposit removal unit 600c.
The cover 600a and the first deposit removal part 600b have the same configuration as the covers 6a and 60a and the first deposit removal parts 6b and 60b of the first and second embodiments.

  The second adhering matter removing portion 600c is, for example, a brush-like member provided on the inner surface of the cover 600a, and is provided so that the tip of the second adhering matter removing portion 600c can be in sliding contact with the moving blade 4 when the moving blade 4 is covered with the cover 600a. It has been.

  The deposit removing device 600 of the present embodiment attaches the deposit removing device 600 to the moving blade 4 when removing the deposit S, so that the deposit removing portion 600d provided on the inner surface of the cover 600a is moved to the moving blade 4. Slidably contact the outer surface of Thereby, the deposit S attached to the moving blade 4 can be removed simply by mounting the deposit removing device 600 on the moving blade 4. That is, since the deposit S on the moving blade 4 can be removed simultaneously with the removal of the deposit S on the stationary blade 5, the deposit S can be more efficiently removed.

The embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, the deposit removing devices 6 and 600 may be attached to the stationary blade 5. When attaching the deposit removing devices 6 and 600 to the stationary blade 5, the covers 6a and 600a of the deposit removing devices 6 and 600 may be formed of an elastic body such as rubber, for example. Thereby, not only the deposit S adhered to the stationary blade 5 but also the deposit S adhered to the blade body of the rotor blade 4 can be efficiently removed. Further, when the deposit removing devices 6 and 600 are attached to the blade body of the stationary blade 5, the first deposit removing portions 6b and 600b are in sliding contact with the outer surface of the adjacent moving blade 4 in the axis O direction. The deposit S can be removed without positioning the deposit removing devices 6b and 600b.

  Moreover, although the example which attached the deposit removal apparatus 6 and 600 to one rotor blade 4 of the moving blade group was demonstrated above, the deposit removal apparatus 6 to the several moving blade 4 of one moving blade group, 600 may be attached. That is, the deposit removing devices 6 and 600 may be attached to at least one of the plurality of blades 4 in the blade group. Furthermore, the deposit removing devices 6 and 600 may be attached to at least one of the plurality of stationary blades 5 of the stationary blade group.

Further, the deposit removing portions 6a, 60a, and 600a are not necessarily brush-like members, and may be any members that can remove the deposit S and do not damage the adjacent blades in the axial direction.
Furthermore, you may employ | adopt the form which combined each of the above each embodiment.

  Moreover, although each embodiment demonstrated the example applied to the air blower as the axial flow rotary machine 1, you may apply to other axial flow rotary machines, such as a compressor, for example. Furthermore, the object to be pumped is not limited to gas, and the present invention may be applied to an axial-flow rotating machine that uses an axial-flow pump that pumps liquid.

DESCRIPTION OF SYMBOLS 1 Axial flow rotary machine 2 Casing 3 Rotating shaft 4 Rotor blade (blade body of the first blade group)
5 Static wing (the wing body of the second wing group)
6 Adhering substance removing device 6a Cover 6b First adhering substance removing part 7 Roller 7a Roller support part 8 Link member 10 Inspection hole 11 Inspection lid 60 Adhering substance removing apparatus 60a Cover 60b First adhering substance removing part 600 Adhering substance removing apparatus 600a Cover 600b First deposit removal portion 600c Second deposit removal portion

Claims (5)

A plurality of wing bodies arranged radially about the axis and having a plurality of wing bodies rotating relative to each other around the axis are provided on at least one of the wing bodies of the first wing group. A first deposit removing portion extending toward the blade body of the second blade group and slidingly contacting the blade body of the second blade group ;
A cover for covering the wing body of the first wing group,
The first deposit removing unit is a deposit removing device provided on an outer surface of the cover . 2. The deposit removal apparatus according to claim 1 , wherein the first deposit removal unit is movable in a radial direction of the axis with respect to the cover. Provided on the cover, the outer peripheral surface contacts the inner surface of the casing surrounding the first blade group and the second blade group, so that the first blade group rotates about the axis along with the rotation about the axis. Roller to
The first end is pivotably connected to the first deposit removal part, and the second end opposite to the first end is eccentric from the central axis of the roller and can be pivoted to the roller. The deposit removing apparatus according to claim 2 , further comprising a link member connected to the link. Provided on an inner surface of the cover, deposit removing device according to any one of claims 1 to 3, characterized in that it comprises a second attached matter removing section in sliding contact with the wing of the first blade group . A first wing group and a second wing group having a plurality of wings extending radially from an axis and rotating relative to each other about the axis;
A casing arranged so as to surround the first blade group and the second blade group;
An axial flow rotary machine provided with the deposit removing apparatus according to any one of claims 1 to 4 .

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