JP2021179174A - Rotary equipment and pump device - Google Patents

Abstract

To provide rotary equipment and a pump device having improved discharge efficiency and maintainability by eliminating the need for a motor which is conventionally needed, a power transmission shaft for transmitting power from the motor to an impeller, and a bearing for the power transmission shaft.SOLUTION: An impeller 11 and a support part 13 are opposed to each other over the whole periphery around a rotation axis 12. The impeller is provided with a blade side opposite face 15a and the support part 13 is provided with a support side opposite face 13a. A drive mechanism for supplying drive fluid into a clearance between the support side opposite face 13a and the blade side opposite face 15a includes a plurality of supply ports 16 provided around the rotation axis in the support side opposite face, an air compressor 2 as a supply mechanism for supplying the drive fluid via the supply ports 16 into the clearance, and a direction control valve 3 for controlling the supply of the drive fluid from the air compressor 2 via any supply port 16 out of the supply ports 16 into the clearance.SELECTED DRAWING: Figure 2

Description

The present invention is a rotating device provided with an impeller, a support portion that rotatably supports the impeller about the center of rotation, and a drive mechanism for rotating the impeller supported by the support portion. And the pump device having the rotating equipment.

When there is a lot of rainfall, it is not possible to drain water sufficiently by natural flow to the river, so a pump device for rainwater drainage is installed at the rainwater drainage pump station or the relay pumping station of the combined sewer network to avoid inland water inundation. .. Since these pump devices require a large amount of drainage in a short time instead of having a relatively low required lift, a pump device having a vertical axis or horizontal axis oblique flow impeller is often used. In addition, many foreign substances such as earth and sand, vegetation fragments, and household waste are contained in these wastewaters.

As shown in Patent Document 1, the pump device in such an application includes a pump unit having an impeller, a suction bell mouth, a pumping pipe, a discharge pipe, a prime mover for rotating the impeller, and the like. ..

As mentioned above, it is prioritized to operate such a pump device reliably in an emergency, and regular maintenance is indispensable. On the other hand, if there is no rainfall, it cannot be confirmed by a trial run, and maintenance of the prime mover and bearings. There is room for improvement in terms of certainty.

Further, the power transmission shaft for transmitting power from the prime mover to the impeller is arranged in the longitudinal direction in the pumping pipe, and is rotatably supported by bearings at an appropriate position.

The ratio of the pipe length to the pipe diameter of the pumping pipe may exceed 10 times (20 m in pipe length) at the longest, and the power transmission shaft arranged in the pumping pipe is also lengthened, and the bearings and bearings that rotationally support the shaft. A plurality of support beams are also provided. In this case, since the main shaft and a plurality of bearings and bearing support beams are arranged in the pumping pipe where obstacles should not be originally placed, the flow cross-sectional area in the pumping pipe may decrease, the efficiency may decrease, and foreign matter may be entangled. There is.

Furthermore, when it is necessary to disassemble and inspect the pump part, bearings, etc. for condition maintenance or regular maintenance, it is necessary to lift the entire pump device including the pumping pipe. Such work was very large and costly. In addition, it was necessary to take it back to the factory because it could not be repaired locally.

JP-A-2015-158133

The present invention has been made in view of the above problems, and eliminates the need for a prime mover, a power transmission shaft for transmitting power from the prime mover to an impeller, and a bearing for the power transmission shaft, which has been conventionally required, and discharges. It is an object of the present invention to provide a rotating device and a pump device having improved efficiency and maintainability.

The characteristic configuration of the rotating device according to the present invention for achieving the above-mentioned object is an impeller, a support portion that rotatably supports the impeller around the center of rotation axis, and the blade supported by the support portion. A rotating device provided with a drive mechanism for rotating a vehicle, wherein the impeller and the support portion are provided on the impeller, which face each other over the entire circumference of the rotation axis. The drive mechanism has a blade-side facing surface and a support-side facing surface provided on the support portion, and the drive mechanism is used to supply a drive fluid to a gap between the support-side facing surface and the blade-side facing surface. A plurality of supply ports provided around the center of rotation on the support side facing surface, a supply mechanism for supplying the drive fluid to the gap through the respective supply ports, and the supply ports from the supply mechanism to the supply ports. A control mechanism for controlling which of the supply ports is used to supply the driving fluid to the gap is provided.

The supply mechanism controlled by the control mechanism supplies the drive fluid to the gap through each supply port, so that the gap between the support side facing surface and the blade side facing surface is wide at the position where the drive fluid is supplied. Become. On the other hand, at the position opposite to the rotation axis, the gap between the support side facing surface and the blade side facing surface becomes narrow and comes into contact with each other.

It is preferable that the plurality of supply ports are evenly provided around the center of rotation axis. There are three or more supply ports. When the control mechanism controls the supply mechanism and supplies the drive fluid to the gap in a predetermined order through each supply port, specifically, in the direction opposite to the rotation direction of the impeller, the position where the gap expands is the rotation axis. By moving around the center of rotation, that is, the contact position moves around the center of rotation axis, the impeller obtains a reaction force around the center of rotation axis and rotates.

That is, if the impeller rotation direction is clockwise when viewed from the fluid discharge direction, the drive fluid is supplied to each supply port in a counterclockwise direction, and the impeller rotation direction is counterclockwise. If so, the supply of the driving fluid to each supply port will be clockwise. As the driving fluid, air and water can be preferably exemplified because it is easily available and easy to handle.

Since the area of the facing surface between the support portion and the impeller can be made wider than the facing surface between the conventional rotating shaft and the bearing, the surface pressure can be reduced. Therefore, the risk of wear can be reduced as compared with the conventional case.

In the present invention, the impeller has a blade provided around the center of rotation axis and a shroud provided on the tip side of the blade, and the support portion is in the radial direction of the impeller. The load and the load in the axial direction are configured to be supported via the shroud, the blade-side facing surface is provided on the outward surface of the shroud, and the support-side facing surface is provided on the inward surface of the support portion. It is preferable that it is used.

The above configuration can be exemplified as an example of an impeller or a support portion, and by supplying a driving fluid to the gap between the support portion and the shroud, the support portion and the shroud are intentionally brought into contact with each other to rotate the impeller. Can be done. The impeller may or may not have a boss. With the above configuration, it is possible to test run the pump device and obtain information necessary for maintenance even if there is no rainfall.

In the present invention, the impeller has a blade provided around the center of rotation, a shroud provided on the tip side of the blade, and a flange portion provided on the shroud, and the support thereof is provided. The portion is configured to support at least the load in the axial direction of the impeller via the flange portion, and the blade-side facing surface is provided on the downward surface of the flange portion, and the support-side facing surface is provided. Is preferably provided on the upward surface of the support portion.

The above configuration can be exemplified as an example of an impeller or a support portion. By supplying a driving fluid to the gap between the flange portion and the support portion, the support portion and the flange portion are intentionally brought into contact with each other to rotate the impeller. Can be made to. The impeller may or may not have a boss at the portion of the rotation axis. Further, the support portion may be configured to support not only the load in the axial direction but also the load in the radial direction of the impeller via the flange portion or the shroud.

In the present invention, the impeller has a rotation shaft provided at the position of the rotation axis center, a boss provided on the rotation shaft, and a blade provided on the boss, and the support portion. Is configured to support at least the radial load of the impeller via the rotation shaft, the blade-side facing surface is provided on the outward surface of the rotation shaft, and the support-side facing surface is It is preferable that the support portion is provided on the inward surface.

The above configuration can be exemplified as an example of an impeller or a support portion. By supplying a driving fluid to the gap between the support portion and the rotating shaft, the rotating shaft and the supporting portion are intentionally brought into contact with each other to rotate the impeller. Can be made to. A flange portion may be provided on the rotating shaft, and the supporting portion may be configured to support a load in the axial direction of the impeller via the flange portion of the rotating shaft.

In the present invention, the impeller is opposed to the support-side facing surface and the blade-side facing surface along the circumferential direction from the support portion by contact between the support-side facing surface and the blade-side facing surface. It is preferable that the surface treatment is applied so that the force can be obtained.

If the friction between the support side facing surface and the blade side facing surface is configured to be extremely small, the impeller is sufficient along the circumferential direction from the support portion due to the contact between the supporting side facing surface and the blade side facing surface. It is difficult to rotate the impeller because the reaction force cannot be obtained.

Therefore, the surface treatment is applied as described above. As a surface treatment, the support side facing surface and the blade side facing surface are made of synthetic resin (elastomer or plastic), and gears and grooves that can mesh with each other are formed on the supporting side facing surface and the blade side facing surface. A process such as roughening the facing surface and the blade-side facing surface with each other can be exemplified.

If the material of the impeller is made weaker than the support part, or if the material of the support part is made weaker than the material of the impeller, wear etc. is likely to occur on the weaker side. It is possible to predict which of the impellers will need to be repaired. Since friction is reduced by the driving fluid supplied to the gap during pumping, it is preferable to select the material in anticipation of this.

In the present invention, it is preferable that the control mechanism is configured so that the supply pace of the drive fluid from each supply port can be adjusted by the supply mechanism.

The supply mechanism is controlled by a control mechanism, and the drive fluid can be supplied from each supply port in a predetermined order. At that time, the blades are adjusted by adjusting the supply pace of the drive fluid to each supply port. The number of revolutions of the car can be adjusted.

In the present invention, it is preferable that the supply mechanism is configured so that the supply pressure of the drive fluid supplied from each supply port can be individually adjusted.

The discharge amount changes according to the rotation speed of the impeller. A force acting in the direction opposite to the discharge direction acts on the impeller, and this force changes according to the discharge amount, and is small when the discharge amount is small and large when the discharge amount is large. When the supply amount of the driving fluid is constant, the above-mentioned force changes, so that the degree of contact between the support side facing surface and the blade side facing surface is not stable, and the rotation of the impeller is not stable. On the other hand, as described above, if the control mechanism is configured so that the supply pressure of the drive fluid supplied from each supply port can be individually adjusted by the supply mechanism, the force can be stably resisted. Therefore, the degree of contact between the support side facing surface and the blade side facing surface can be stabilized, and the rotation of the impeller can be stabilized. The rotation speed of the impeller may be detected by a non-contact sensor.

In the present invention, it is preferable that the driving fluid is air.

Air is suitably used as a driving fluid because it can be easily secured on the ground. In this case, the supply mechanism can be configured from a known air compressor or the like, and the air supplied from the air compressor can be supplied to the supply port via the air tube. Since the air tube is easy to handle, the air compressor can be installed away from the rotating equipment. For example, when the rotating equipment is applied to the pumping equipment installed in the pump facility, if the air compressor is installed near the entrance of the building of the pump facility, the workability of maintenance and inspection and replacement of the air compressor will be improved. If it is installed on the upper floor of the building, it is possible to avoid flood damage of the power source even in the unlikely event of inland flooding. When using air as a driving fluid, it is preferable to remove dust with a known filter or the like.

The characteristic configuration of the pump device according to the present invention for achieving the above-mentioned object is any of the above-mentioned characteristics of sucking a fluid through a suction bell mouth, a pumping pipe, and the suction bell mouth and discharging the fluid to the pumping pipe. A pump device having a rotating device having a configuration, wherein the downstream end portion of the suction bell mouth and the upstream end portion of the pumping pipe are not fastened and connected via an installation portion of the rotating device. It is preferable that the rotating device is configured to be detachably installed from the ground to the installation portion via the inside of the pumping pipe.

Conventionally, the suction bell mouth is fastened and connected to the suction port of the rotating device, the pumping pipe is fastened and connected to the discharge port of the rotating device, and the prime mover is directly connected directly above the pump part. After removing it, it was necessary to pull up not only the rotating equipment but also the suction bell mouth and the pumping pipe, so it was necessary to use a large hoist and a crane, and the work itself was large and costly.

According to the above configuration, during maintenance, only the rotating equipment can be pulled up to the ground while leaving the suction bell mouth and pumping pipe as it is, so this can be done with a small hoist or crane, and the work itself is easy. , The cost can also be reduced.

Since the unitized rotating device can be attached and detached, the one manufactured at the factory can be used as it is, and there is no need for on-site adjustment such as adjustment of the internal gap required for rotation. The installation unit may be equipped with an air pillow.

When the rotating equipment is not in operation, the driving fluid shall be diverted to other uses, for example, by stirring the residual water in the water tank in which the pump device is installed to suppress spoilage and residue accumulation. Is possible.

Normally, a plurality of pump devices including a spare machine are installed in a rainwater drainage pump station, and conventionally, it has been necessary to install a prime mover for each of a plurality of pump devices, even if it is a spare machine. On the other hand, the pump device according to the present invention is connected to one supply mechanism via a directional control valve even when a plurality of pump devices are arranged side by side, and is used as a drive fluid supplied from this supply mechanism. By switching the direction control valve for air, it can be operated selectively.

In the conventional pump device, since the prime mover cannot control the rotation speed, the flow rate is adjusted by the flow rate control valve provided on the discharge side, and the prime mover is in a state of wasting power. Further, if a speed change mechanism is used or an inverter is provided for adjusting the rotation speed, the device becomes expensive.

In the pump device according to the present invention, the rotating device can adopt a configuration in which the rotation rate of the impeller can be adjusted by adjusting the supply pace of the drive fluid to the supply port as described above. , It is not necessary to provide a flow rate control valve on the discharge side.

It is a schematic diagram of the pump device which concerns on this invention. It is explanatory drawing of the rotating apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing of the rotating apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing of the rotating apparatus which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the rotating apparatus which concerns on 3rd Embodiment of this invention.

FIG. 1 shows a water tank 100 of a pump facility in which a rotary device 10 according to the present invention and a pump device 1 having the rotary device 10 are installed.

For example, four pump devices 1 are arranged side by side in the water tank 100. One of the four is a spare. In FIG. 1, one pump device 1 is shown.

Each pump device 1 is connected to one air compressor 2, and the rotating device 10 is driven by selectively supplying air as a drive fluid discharged from the air compressor 2 by a directional control valve 3. do. Since the air compressor 2 is installed not directly above each pump device 1 but near the entrance of the building of the pump facility, the workability of maintenance, inspection and replacement of each pump device 1 and the air compressor 2 is good. In the present embodiment, the air compressor 2 constitutes the supply mechanism according to the present invention, and the directional control valve 3 constitutes the control mechanism according to the present invention.

Since each pump device 1 has the same configuration, each pump device 1 will be described without distinction in the following description.

As shown in FIGS. 1 to 3, the pump device 1 includes a suction bell mouth 4, a rotating device 10, a pumping pipe 5, and the like, and supplies rainwater flowing into the water tank 100 to the discharge pipe 7. Is.

A guide blade (not shown) is provided on the inner surface of the suction bell mouth 4. An inward flange portion as an installation portion 6 of the rotating device 10 is provided at the upstream end portion, that is, the lower end portion of the pumping pipe 5. The installation unit 6 is configured so that the rotation device 10 can be detachably installed so that the center of the opening of the installation unit 6 and the rotation axis 12 of the rotation device 10 substantially coincide with each other.

An air pillow may be provided between the pumping pipe 5 and the rotating device 10 so that the rotation axis 12 of the rotating device 10 can be easily aligned with the center of the opening of the installation portion 6. The air used for the air pillow is supplied from, for example, the air compressor 2.

An inspection port 8 is provided in the curved pipe portion of the pumping pipe 5, and the rotating device 10 can be suspended from the ground to the installation portion 6 by a crane or a hoist via the inspection port 8 or from the installation portion 6. It is lifted to the ground.

In this way, at the time of maintenance, only the rotating device 10 can be pulled up to the ground while leaving the air compressor 2, the suction bell mouth 4, and the pumping pipe 5 as the drive mechanism, so this is done by a small hoist or a crane. The work itself is easy and the cost can be reduced.

As shown in FIGS. 2 and 3, the rotating device 10 includes an impeller 11, a support portion 13 that rotationally supports the impeller 11 around a rotation axis 12, and an impeller 11 supported by the support portion 13. An air compressor 2 and a direction control valve 3 as a rotating drive mechanism are provided, and the rainwater sucked from the water tank 100 via the suction bell mouth 4 is discharged to the pumping pipe 5.

The impeller 11 has a blade 14 provided around the rotation axis 12 and a shroud 15 provided on the tip side of the blade 14. In this embodiment, since the impeller 11 does not have a boss, the flow path is wider than in the case where the impeller 11 has a boss, and the possibility that foreign matter is entangled with the impeller 11 is reduced. However, the impeller 11 may have a boss and may have a swept wing shape.

The support portion 13 is configured to support the radial load and the axial load of the impeller 11 via the shroud 15.

A support-side facing surface 13a is provided on the inward surface of the support portion 13. Further, a blade-side facing surface 15a is provided on the outward surface of the shroud 15. When the impeller 11 is supported by the support portion 13, the support side facing surface 13a and the blade side facing surface 15a face each other over the entire circumference around the rotation axis 12.

The support side facing surface 13a and the blade side facing surface 15a are made of, for example, a polyetheretherketone (PEEK) resin containing a carbon filler or the like. As a result, appropriate contact between the support side facing surface 13a and the blade side facing surface 15a is performed, and the impeller 11 can efficiently obtain a reaction force from the support portion 13 along the circumferential direction. There is.

On the support side facing surface 13a, four supply ports 16 are provided around the rotation axis 12 at equal intervals. The supply port 16 is open to the recess 13b, which is a recess provided in the support side facing surface 13a. In the present embodiment, the supply ports 16 are provided at the same height around the rotation axis 12, but the arrangement and number of the supply ports 16 are not limited to this. The recess 13b may not be provided.

Air as a driving fluid supplied from the air compressor 2 is supplied to each supply port 16 via the air tube 17. The air discharged from the air compressor 2 can be selectively supplied to the predetermined supply port 16 by the directional control valve 3. The directional control valve 3 is preferably a diaphragm type because of its good responsiveness, but other types may be used.

The air compressor 2 supplies air, which is a driving fluid, to the gap between the support side facing surface 13a and the blade side facing surface 15a. At that time, the directional control valve 3 controls which of the supply ports 16 the air compressor 2 supplies the drive fluid to the gap.

As shown in FIG. 3, the supply of the drive fluid is controlled by the directional control valve 3, and the supply amount is, for example, about 1 L to 10 L per second and the supply pressure is about 0.1 MPa to 0.5 MPa through each supply port 16. Is supplied to the gap between the support side facing surface 13a and the blade side facing surface 15a according to the above conditions.

As a result, the gap between the support side facing surface 13a and the blade side facing surface 15a becomes wide at the position where the driving fluid is supplied. At this time, the gap is about several μm to several tens of μm. This gap is designed in consideration of the dimensions of the rotating device 10, the amount of air supplied from the air compressor 2, and the supply pressure. On the other hand, at the position opposite to the rotation axis 12, the gap between the support side facing surface 13a and the blade side facing surface 15a becomes narrow and comes into contact with each other.

In the present embodiment, as shown in FIG. 3, since the rotation direction of the impeller 11 is clockwise when viewed from the fluid discharge direction, the periodic fluctuation of the drive fluid supply from each supply port 16 is counterclockwise. It is turned clockwise. If the rotation direction of the impeller 11 is counterclockwise, the periodic fluctuation of the supply of the drive fluid from each supply port 16 is clockwise.

The rotation principle of the impeller 11 will be described in detail below. As shown in FIG. 3, the four supply ports 16 in the present embodiment are designated as supply ports 16a to 16d by adding a to d counterclockwise when viewed from the fluid discharge direction. First, the supply of the drive fluid to the supply port 16a is gradually increased, then gradually decreased, and then the supply of the drive fluid to the supply port 16b is gradually increased. At this time, in accordance with the change in the supply of the drive fluid from the supply port 16a to the supply port 16b, from the opposite side of the supply port 16a, that is, from around the supply port 16c to the opposite side of the supply port 16b, that is, around the supply port 16d. , The position of contact moves.

That is, since the contact position moves while the blade-side facing surface 15a is pressed against the support-side facing surface 13a, the blade-side facing surface 15a rolls on the contact surface, and the inner peripheral length of the support-side facing surface 13a and the outer peripheral length of the blade-side facing surface 15a. The impeller 11 will rotate according to the circumference ratio. If there is no friction between the support side facing surface 13a and the blade side facing surface 15a, the impeller 11 does not rotate because the support side facing surface 13a and the blade side facing surface 15a slide. However, in reality, since a certain amount of friction is generated on the contact surface between the support side facing surface 13a and the blade side facing surface 15a, a rolling force without slipping, that is, a force for rotating the impeller 11 can be generated.

The directional control valve 3 is configured to be able to adjust the periodic fluctuation of the drive fluid supplied from each supply port 16 by the air compressor 2, in other words, the supply pace, according to the desired rotation speed of the impeller 11. Further, the air compressor 2 is configured so that the supply pressure of the drive fluid supplied from each supply port 16 can be individually adjusted according to the rotation speed of the impeller 11. The support portion 13 is provided with a non-contact sensor so that the rotation speed of the impeller 11 can be detected.

By adjusting the supply pace of the directional control valve 3, the supply pace of the drive fluid from each supply port 16 is adjusted, and the rotation speed of the impeller 11 is adjusted. Since the supply pressure of the drive fluid supplied from each supply port 16 by the air compressor 2 is individually adjusted, it is stable even if the force acting on the impeller 11 in the direction opposite to the discharge direction fluctuates with the discharge amount. Therefore, the degree of contact between the support side facing surface 13a and the blade side facing surface 15a can be stabilized, and the rotation of the impeller 11 can be stabilized.

As described above, when the drive fluid is supplied from the air compressor 2 to the gap through each supply port 16 by the direction control valve 3 in a predetermined order, specifically, in the direction opposite to the rotation direction of the impeller 11, the gap is created. The spreading position moves around the rotation axis 12, that is, the contacting position moves around the rotation axis 12. At this time, due to the difference between the inner peripheral length of the support side facing surface 13a and the outer peripheral length of the blade side facing surface 15a, the impeller 11 rotates by obtaining a reaction force around the rotation axis 12.

Next, another embodiment of the rotating device according to the present invention will be described. Here, a configuration different from that of the rotating device 10 according to the above-described embodiment will be described in detail, and the same reference numerals will be given to the same configuration to simplify or omit the description.

As shown in FIG. 4, the impeller 11 includes a blade 14 provided around a rotation axis 12, a shroud 15 provided on the tip side of the blade 14, and a flange portion 18 provided on the shroud 15. Have. In this embodiment, since the impeller 11 does not have a boss, the flow path is wider than in the case where the impeller 11 has a boss, and the possibility that foreign matter is entangled with the impeller 11 is reduced. However, the impeller 11 may have a boss.

The support portion 19 is configured to support the load of the impeller 11 at least in the axial direction via the flange portion 18. The support portion 19 is configured to support not only the load in the axial direction of the impeller 11 but also the load in the radial direction via the flange portion 18. The rotating device 10 is provided with the support portion 13 as in the above-described embodiment in addition to the support portion 19, and even if the load in the radial direction of the impeller 11 is supported via the shroud 15 instead of the flange portion 18. good.

In the present embodiment, the blade-side facing surface 18a is provided on the downward surface of the flange portion 18, and the support-side facing surface 19a is provided on the upward surface of the support portion 19. The support portion 19 is provided with a plurality of supply ports 16.

By supplying the driving fluid from each supply port 16 to the gap between the support side facing surface 19a and the blade side facing surface 18a, the support side facing surface 19a and the blade side facing surface 18a are intentionally brought into contact with each other, and the blades are brought into contact with each other. The car 11 rotates.

Next, another embodiment of the rotating device according to the present invention will be described. Here, a configuration different from that of the rotating device 10 according to the above-described embodiment will be described in detail, and the same reference numerals will be given to the same configuration to simplify or omit the description.

As shown in FIG. 5, the impeller 11 has a rotation shaft 20 provided at the position of the rotation axis 12, a boss 21 provided on the rotation shaft 20, and a blade 14 provided on the boss 21. doing.

In the present embodiment, a bracket portion extending from the inner surface of the pumping pipe 5 to the center is provided as an installation portion 6 of the rotating device 10 at the upstream end portion, that is, the lower end portion of the pumping pipe 5. The installation unit 6 is configured so that the rotation device 10 can be detachably installed so that the center of the opening of the installation unit 6 and the rotation axis 12 of the rotation device 10 substantially coincide with each other.

The support portion 23 is configured to support the load of the impeller 11 in the radial direction via the rotating shaft 20. A flange portion 22 is provided on the rotating shaft 20, and the supporting portion 23 is configured to support a load in the axial direction of the impeller 11 via the flange portion 22 of the rotating shaft 20.

In the present embodiment, the blade-side facing surface 20a is provided on the outward surface of the rotating shaft 20, and the support-side facing surface 23a is provided on the inward surface of the support portion 23. The support portion 23 is provided with a plurality of supply ports 16.

By supplying the driving fluid from each supply port 16 to the gap between the support side facing surface 23a and the blade side facing surface 20a, the support side facing surface 23a and the blade side facing surface 20a are intentionally brought into contact with each other, and the blades are brought into contact with each other. The car 11 rotates.

In the above-described embodiment, four supply ports 16 are provided, but at least three supply ports 16 may be provided.

In the above-described embodiment, the support-side facing surfaces 13a, 19a, 23a and the blade-side facing surfaces 15a, 18a, 20a are made of, for example, a polyetheretherketone (PEEK) resin containing a carbon filler or the like. Not limited to. For example, as surface treatment of the support side facing surfaces 13a, 19a, 23a and the blade side facing surfaces 15a, 18a, 20a, the support side facing surfaces 13a, 19a, 23a and the blade side facing surfaces 15a, 18a, 20a are made of a synthetic resin (elastomer). Or it may be composed of plastic). Further, gears that can mesh with each other may be formed on the support side facing surfaces 13a, 19a, 23a and the blade side facing surfaces 15a, 18a, 20a. Alternatively, processing such as roughening the support side facing surfaces 13a, 19a, 23a and the blade side facing surfaces 15a, 18a, 20a with each other may be performed.

The material of the blade-side facing surfaces 15a, 18a, 20a of the impeller 11 is made weaker than the material of the support-side facing surfaces 13a, 19a, 23a of the support portions 13, 19, 23, or vice versa. If the material of the support side facing surfaces 13a, 19a, 23a is made weaker than the material of the blade side facing surfaces 15a, 18a, 20a, wear or the like is likely to occur on the weaker side. It is possible to predict which of the blade-side facing surfaces 15a, 18a, and 20a with 19a and 23a needs to be repaired.

In the above-described embodiment, the supply mechanism is composed of one air compressor 2 and a directional control valve 3 for switching the supply to each supply port 16, but the present invention is not limited to this. An air compressor 2 corresponding to each supply port 16 may be provided. Further, an air compressor 2 corresponding to a plurality of pump devices 1 may be provided.

In the above-described embodiment, the case where the rotating device 10 is provided in the vertical shaft pump device 1 and functions as a pump has been described, but the present invention is not limited to this. The rotating device 10 may be provided, for example, on a ship and may function as a propulsion device.

1: Pump device 2: Air compressor (supply mechanism, drive mechanism)
3: Direction control valve (control mechanism, drive mechanism)
4: Suction bell mouth 5: Pumping pipe 6: Installation part 7: Discharge pipe 8: Inspection port 10: Rotating equipment 11: Impeller 12: Rotating axis 13: Support part 13a: Support side facing surface 13b: Recess 14: Blade 15: Shroud 15a: Blade side facing surface 16: Supply port 17: Air tube 18: Flange portion 18a: Blade side facing surface 19: Support portion 19a: Support side facing surface 20: Rotating shaft 20a: Blade side facing surface 21: Boss 22: Flange part 23: Support part 23a: Support side facing surface 100: Pump well

Claims (9)

With an impeller,
A support portion that rotatably supports the impeller around the center of rotation,
A rotating device provided with a drive mechanism for rotating the impeller supported by the support portion.
The impeller and the support portion have a blade-side facing surface provided on the impeller and a support-side facing surface provided on the support portion, which face each other over the entire circumference of the rotation axis. Have and
The drive mechanism includes a plurality of supply ports provided around the rotation axis center on the support side facing surface in order to supply the driving fluid to the gap between the support side facing surface and the blade side facing surface.
A supply mechanism that supplies the drive fluid to the gap through each supply port,
A rotating device comprising: a control mechanism for controlling which of the supply ports of the supply port the drive fluid is supplied to the gap from the supply mechanism. The impeller has a blade provided around the center of rotation axis and a shroud provided on the tip side of the blade.
The support portion is configured to support the radial load and the axial load of the impeller via the shroud.
The blade-side facing surface is provided on the outward surface of the shroud.
The rotating device according to claim 1, wherein the support-side facing surface is provided on an inward surface of the support portion. The impeller has a blade provided around the center of rotation, a shroud provided on the tip side of the blade, and a flange portion provided on the shroud.
The support portion is configured to support a load of the impeller at least in the axial direction via the flange portion.
The blade-side facing surface is provided on the downward surface of the flange portion.
The rotating device according to claim 1, wherein the support-side facing surface is provided on an upward surface of the support portion. The impeller has a rotation shaft provided at the position of the rotation axis center, a boss provided on the rotation shaft, and a blade provided on the boss.
The support portion is configured to support a load of the impeller at least in the radial direction via the rotation shaft.
The blade-side facing surface is provided on the outward surface of the rotating shaft.
The rotating device according to claim 1, wherein the support-side facing surface is provided on an inward surface of the support portion. The impeller can obtain a reaction force from the support portion along the circumferential direction by contacting the support side facing surface and the blade side facing surface with the support side facing surface and the blade side facing surface. The rotating device according to any one of claims 1 to 4, wherein the surface treatment is applied so as to be possible. The rotating device according to any one of claims 1 to 5, wherein the control mechanism is configured so that the supply pace of the driving fluid from each supply port can be adjusted by the supply mechanism. The rotary device according to any one of claims 1 to 6, wherein the supply mechanism is configured so that the supply pressure of the drive fluid supplied from each supply port can be individually adjusted. The rotating device according to any one of claims 1 to 7, wherein the driving fluid is air. A pump device comprising a suction bell mouth, a pumping pipe, and a rotating device according to any one of claims 1 to 8, wherein a fluid is sucked in through the suction bell mouth and discharged to the pumping pipe.
The downstream end of the suction bell mouth and the upstream end of the pumping pipe are communicated with each other via the installation portion of the rotating device without being fastened and connected.
The rotating device is a pump device configured to be detachably installed from the ground to the installation portion via the inside of the pumping pipe.

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