JP2017089422A - Pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a possibility that the inside of a casing gets clogged with a foreign body.SOLUTION: A pump 1 device comprises: an electric motor 10; a casing 15 provided with a suction port 151 for sucking liquid, and provided with a discharge port 17 for discharging the liquid; an impeller 14 provided inside the casing, and to which the rotational torque of the electric motor is transmitted; and a plurality of ribs 16-1 and 16-2 provided on an outer wall of the casing so as to partially block the suction port. A flow passage is formed so that when the impeller is rotated, liquid is sucked from the suction port 151, and the sucked liquid is discharged from the discharge port 17. A suction port blade tip diameter of the impeller is equal to or larger than a maximum distance out of distances between the adjacent ribs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump device.

  Various pumps (for example, submersible pumps for sewage and filth) that suck in liquid containing foreign substances have been commercialized (see, for example, Patent Documents 1 and 2). These pumps are known to improve the suction performance of the pump by increasing the area of the suction port.

Japanese Patent Laid-Open No. 61-252893 Japanese Utility Model Publication No.59-131596

  On the other hand, the maximum particle size of foreign matter that can pass through the pump is limited by the shape of the flow path formed by the impeller and the casing inside the pump casing. Therefore, if the area of the suction port is increased for the purpose of improving the pump suction performance, foreign matter exceeding the maximum particle size that can pass through the pump flows into the casing, and the foreign matter blocks the inside of the casing. It was.

  This invention is made | formed in view of the said problem, and it aims at providing the pump apparatus which makes it possible to reduce possibility that a foreign material will obstruct | occlude the inside of a casing.

  A pump device according to an aspect of the present invention includes an electric motor, a casing provided with a suction port for sucking liquid and a discharge port through which the liquid is discharged, provided in the casing, and the rotational torque of the motor is An impeller to be transmitted and a plurality of ribs provided on the outer wall of the casing so as to partially block the suction port, and when the impeller rotates, liquid is sucked from the suction port. A flow path through which the sucked liquid is discharged from the discharge port is formed, and the tip diameter of the suction port blade of the impeller is equal to or greater than the maximum distance among the distances between the adjacent ribs.

  Thereby, when a pump apparatus is installed vertically, the particle size of the foreign material that flows into the casing from the horizontal gap between the ribs can be suppressed to a maximum distance or less among the distances between adjacent ribs. Since the tip diameter of the inlet blade of the impeller is the maximum particle size that can pass through the inside of the pump, the particle size of the foreign matter that flows into the casing can be suppressed to the maximum particle size that can pass through the inside of the pump. As a result, it is possible to reduce the possibility that foreign matter will block the inside of the casing.

  The pump apparatus which concerns on 1 aspect of this invention is said pump apparatus, Comprising: The opening diameter of the said suction inlet is more than the suction inlet blade front-end | tip diameter of the said impeller.

  Thereby, since the area of a suction inlet can be expanded, the suction performance of a pump can be improved.

  The pump device according to an aspect of the present invention is any one of the above pump devices, wherein the plurality of ribs are connected to the plurality of ribs on a surface opposite to a surface connected to the casing. Is further provided.

  Thereby, even if there is a space on the surface opposite to the surface where the rib is connected to the casing, the inflow of foreign matter from below the rib into the casing can be physically blocked.

  A pump device according to an aspect of the present invention is any one of the above pump devices, wherein a substantially circular hole is provided, and the rib is opposite to the surface connected to the casing. A ring member connected to a plurality of ribs is further provided, and the diameter of the hole is not more than a maximum distance among the distances between the adjacent ribs.

  As a result, even when there is a space on the surface opposite to the surface where the rib is connected to the casing, the particle size of the foreign matter flowing in through the hole provided in the ring member can be reduced by the distance between the adjacent ribs. It can be less than the maximum distance. The tip diameter of the inlet blade of the impeller is the maximum particle size that can pass inside the pump, and the tip diameter of the inlet blade is greater than the maximum distance between adjacent ribs. The particle size of the foreign matter flowing into the pump can be kept below the maximum particle size that can pass through the pump. As a result, it is possible to reduce the possibility that the foreign matter flowing in through the hole closes the inside of the casing.

  Thereby, when a pump apparatus is installed vertically, the particle size of the foreign material that flows into the casing from the horizontal gap between the ribs can be suppressed to a maximum distance or less among the distances between adjacent ribs. Since the tip diameter of the inlet blade of the impeller is the maximum particle size that can pass through the inside of the pump, the particle size of the foreign matter that flows into the casing can be suppressed to the maximum particle size that can pass through the inside of the pump. As a result, it is possible to reduce the possibility that foreign matter will block the inside of the casing.

It is a schematic sectional drawing of the pump apparatus 1 which concerns on 1st Embodiment. It is a part of sectional drawing of the pump apparatus 1 which concerns on 1st Embodiment. It is a bottom view of the suction port vicinity of the pump apparatus 1 which concerns on 1st Embodiment. It is a schematic sectional drawing of the pump apparatus 2 which concerns on 2nd Embodiment. It is a bottom view of the suction port vicinity of the pump apparatus 2 which concerns on 2nd Embodiment. It is a schematic sectional drawing of the pump apparatus 3 which concerns on 3rd Embodiment. It is a bottom view of the suction port vicinity of the pump apparatus 3 which concerns on 3rd Embodiment.

Each embodiment will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 is a schematic cross-sectional view of a pump device 1 according to the first embodiment. The pump apparatus 1 which concerns on this embodiment is a submersible pump which pumps up the dirty water containing a filth as an example. In addition, it is assumed that the pump device 1 according to the present embodiment is mainly used by being placed vertically on the installation surface.

  As shown in FIG. 1, the pump device 1 includes an electric motor 10, and a casing 15 is provided in the lower part of the electric motor 10. The electric motor 10 includes an underwater cable 11, an armature 12 connected to the underwater cable 11, and a rotating shaft 13 connected to an output shaft 121 of the armature 12. Here, the armature 12 includes an output shaft 121, a rotor 122 connected to the output shaft 121, and a stator 123.

  Further, the pump device 1 is connected to the end of the rotary shaft 13 and provided in the casing 15. The impeller 14 to which the rotational torque of the armature 12 is transmitted, the suction port 151 for sucking liquid, and the liquid are discharged. And the four ribs 16-1, 16-2, 16-3, and 16-4 provided to partially block the suction port 151 on the outer wall of the casing 15.

  Operation | movement of the pump apparatus 1 which has the above structure is demonstrated. When the rotor 122 is rotated by electric power supplied from a power source (not shown), the output shaft 121 of the armature 12 is rotated. Thereby, the rotating shaft 13 connected to the output shaft 121 rotates, and the impeller 14 connected to the rotating shaft 13 rotates. When the impeller 14 rotates, a suction action occurs in the suction port 151, a liquid (here, sewage containing foreign matter as an example) is sucked from the suction port 151, and the suctioned liquid is discharged from the discharge port 17. Is formed.

  Then, the characteristic of the structure of the pump apparatus 1 which concerns on this embodiment is demonstrated. FIG. 2 is a part of a cross-sectional view of the pump device 1 according to the first embodiment. FIG. 3 is a bottom view of the vicinity of the suction port of the pump device 1 according to the first embodiment. As shown in FIG. 3, the distance between the adjacent ribs 16-2 and 16-3 is the diameter d1 of the smallest inscribed circle among the inscribed circles in contact with the adjacent ribs 16-2 and 16-3. 2 is the diameter of the inscribed circle at the inlet side end of the front edge 141 of the impeller.

  When the pump device 1 is placed vertically on the installation surface G, the surface opposite to the surface where the ribs 16-1, 16-2, 16-3 and 16-4 are connected to the casing 15 is in contact with the installation surface G. Thereby, since there is no inflow of foreign matter from below the ribs 16-1, 16-2, 16-3, 16-4, the inflow of foreign matter is adjacent to the ribs 16-1, 16-2, 16-3, 16 -4 from the horizontal gap between. The pump device 1 according to the present embodiment has the following structure in order to prevent the inflow of foreign substances from the horizontal gap between adjacent ribs 16-1, 16-2, 16-3, 16-4. As shown in FIG. 3, the distance between the adjacent ribs 16-1 and 16-3 is the diameter d2 of the smallest inscribed circle among the inscribed circles in contact with the adjacent ribs 16-1 and 16-3. Further, as shown in FIG. 3, the distance between the adjacent ribs 16-1 and 16-4 is the diameter d3 of the smallest inscribed circle among the inscribed circles in contact with the adjacent ribs 16-1 and 16-4. is there. As shown in FIG. 3, the distance between the adjacent ribs 16-2 and 16-4 is the diameter d4 of the smallest inscribed circle among the inscribed circles in contact with the adjacent ribs 16-2 and 16-4. is there. Here, as an example, the diameters d1, d2, d3, and d4 have a relationship of d3 <d1 = d2 <d4, and the diameter d4 is the largest of the diameters d1 to d4. The distance is d4.

  The inlet blade tip diameter A of the impeller 14 is equal to or greater than the maximum distance (diameter d4) among the distances between adjacent ribs. Thereby, when the pump apparatus 1 is installed vertically, the particle size of the foreign matter flowing into the casing 15 from the horizontal direction can be suppressed to be equal to or less than the maximum distance (diameter d4) among the distances between adjacent ribs. Since the tip A of the inlet blade of the impeller 14 is the maximum particle size that can pass through the inside of the pump, the particle size of the foreign matter that flows into the casing 15 can be suppressed to the maximum particle size that can pass through the inside of the pump or less. it can. As a result, it is possible to reduce the possibility that the foreign matter closes the inside of the casing 15.

  Further, since the rib 16 has a predetermined height in the direction of the output shaft 121 of the armature 12, it is possible to suppress the backflow from the inside of the casing 15, so that the vicinity of the suction port 151 generated due to this backflow The swirling flow of water can be suppressed. This swirling flow of water is a flow of water rotating on a plane orthogonal to the direction of the output shaft 121 of the armature 12. Thereby, the rotational speed difference between the rotation of the impeller 14 and the rotation of the water flowing into the casing 15 is increased, and the impeller 14 can give more energy to the water, so that the amount of water discharged is increased. The suction performance can be improved.

  Moreover, as shown in FIG. 3, the opening diameter of the suction inlet 151 is D0. The opening diameter D0 of the suction port 151 according to the present embodiment is not less than the suction port blade tip diameter A of the impeller (D0 ≧ h). As described above, the opening diameter D0 of the suction port 151 can be made larger than the suction tip blade tip diameter A of the impeller, as described above, by providing the ribs 16-1, 16-2, 16-3, 16-4. Accordingly, the particle size of the foreign matter flowing into the casing 15 can be suppressed to be equal to or less than the maximum particle size that can pass through the inside of the pump. This is because the foreign matter does not flow into the inside of the casing 15 and block the inside of the casing 15. Thereby, since the area of the suction inlet 151 can be expanded, the suction performance of a pump can be improved.

  As mentioned above, as for the pump apparatus 1 which concerns on this embodiment, the opening diameter D0 of an inlet port is more than the inlet port blade tip diameter A of the impeller 14, and the inlet port blade tip diameter A of an impeller is between adjacent ribs. Is the maximum distance d4 or more (D0 ≧ A ≧ d4).

  Thus, the particle size of the foreign matter flowing into the casing 15 from the horizontal gap between the ribs when the pump device 1 is installed vertically while improving the suction performance of the pump is set to the maximum particle size that can pass through the pump. The following can be suppressed. As a result, it is possible to reduce the possibility that the foreign matter closes the inside of the casing 15. Moreover, since the swirl | vortex flow of the water near the suction inlet 151 which originates in the reverse flow from the inside of the casing 15 can be suppressed, suction performance can be improved.

<Second Embodiment>
Next, the second embodiment will be described. In the first embodiment, when the pump device 1 is placed vertically on the installation surface G, in order to keep the particle size of the foreign matter flowing into the casing 15 from the horizontal direction below the maximum particle size that can pass through the pump, The inlet blade tip diameter A of the impeller was set to be not less than the maximum distance d4 among the distances between adjacent ribs. On the other hand, in the second embodiment, when the pump device 2 is fixed in a state of floating from the installation surface G and there is a space between the lower surface of the rib and the installation surface G, the lower portion of the rib enters the inside of the casing 15. The sealing member 18 is provided so that foreign matter does not flow in.

  FIG. 4 is a schematic cross-sectional view of the pump device 2 according to the second embodiment. As shown in FIG. 4, the pump device 2 according to the second embodiment further includes a sealing member 18 in addition to the configuration of the pump device 1 according to the first embodiment. The sealing member 18 includes a plurality of ribs 16-1, 16-2, 16-3 on a surface opposite to a surface where the plurality of ribs 16-1, 16-2, 16-3, 16-4 are connected to the casing. 16-4. Thereby, the inflow of the foreign material to the inside of the casing 15 from the lower side of the ribs 16-1, 16-2, 16-3, 16-4 can be physically blocked.

  FIG. 5 is a bottom view of the vicinity of the suction port of the pump device 2 according to the second embodiment. As shown in FIG. 5, the sealing member 18 has a disk shape, and the outer peripheral side of the sealing member 18 is connected to the ribs 16-1, 16-2, 16-3, and 16-4. Thereby, the sealing member 18 physically blocks the inflow of foreign matter from below the ribs 16-1, 16-2, 16-3 and 16-4 into the casing 15.

  As described above, the pump device 2 according to the second embodiment has the plurality of ribs 16-1 on the surface opposite to the surface where the plurality of ribs 16-1, 16-2, 16-3, 16-4 are connected to the casing. 16-2, 16-3, and 16-4 are further provided. Thereby, in addition to the effects of the first embodiment, the ribs 16-1, 16-2, 16-3, and 16-4 have a space on the side opposite to the surface that is connected to the casing. In addition, the inflow of foreign matter into the casing 15 from below the ribs 16-1, 16-2, 16-3, 16-4 can be physically blocked.

<Third Embodiment>
Subsequently, a third embodiment will be described. In the first embodiment, when the pump device 1 is placed vertically on the installation surface G, in order to keep the particle size of the foreign matter flowing into the casing 15 from the horizontal direction below the maximum particle size that can pass through the pump, The inlet blade tip diameter A of the impeller was set to be not less than the maximum distance d4 among the distances between adjacent ribs. On the other hand, in the third embodiment, when the pump device 3 is fixed in a state of floating from the installation surface G and there is a space between the lower surface of the rib and the installation surface G, the lower part of the rib enters the inside of the casing 15. A ring member 19 is provided in order to keep the particle size of the inflowing foreign material below the maximum particle size that can pass through the pump.

  FIG. 6 is a schematic cross-sectional view of the pump device 3 according to the third embodiment. As shown in FIG. 6, the pump device 3 according to the third embodiment further includes a ring member 19 in addition to the configuration of the pump device 1 according to the first embodiment. The ring member 19 is provided with a hole 191 and a plurality of ribs 16 on a surface opposite to a surface where the plurality of ribs 16-1, 16-2, 16-3 and 16-4 are connected to the casing 15. -1, 16-2, 16-3, 16-4.

  FIG. 7 is a bottom view of the vicinity of the suction port of the pump device 3 according to the third embodiment. As shown in FIG. 7, the ring member 19 is provided with a circular hole 191. The diameter Dr of the hole 191 is not more than the maximum distance d4 among the distances between adjacent ribs (Dr ≦ d4). Preferably, the diameter Dr of the hole 191 is the maximum distance d4 among the distances between adjacent ribs. As a result, the particle size of the foreign matter flowing in through the hole 191 can be made equal to or less than the distance d4. The suction blade blade tip diameter A of the impeller 14 is the maximum particle size that can pass through the inside of the pump, and the suction blade blade tip diameter A is a distance d4 or more. Therefore, foreign matter that flows into the casing 15 through the hole 191 The particle size can be kept below the maximum particle size that can pass through the pump. As a result, it is possible to reduce the possibility that the foreign matter flowing in through the hole 191 closes the inside of the casing 15.

  As described above, the pump device 3 according to the third embodiment is provided with the circular hole 191 and the surface in which the plurality of ribs 16-1, 16-2, 16-3, 16-4 are connected to the casing. And a ring member 19 connected to the plurality of ribs on the opposite surface. The diameter of the hole 191 is equal to or less than the maximum distance d4 among the distances between adjacent ribs. Thereby, in addition to the effects of the first embodiment, the ribs 16-1, 16-2, 16-3, and 16-4 have a space on the side opposite to the surface that is connected to the casing. In addition, the particle size of the foreign matter that flows in through the hole 191 provided in the ring member 19 can be set to a distance d4 or less. The suction blade blade tip diameter A of the impeller 14 is the maximum particle size that can pass through the inside of the pump, and the suction blade blade tip diameter A is a distance d4 or more. Therefore, foreign matter that flows into the casing 15 through the hole 191 The particle size can be kept below the maximum particle size that can pass through the pump. As a result, it is possible to reduce the possibility that the foreign matter flowing in through the hole 191 closes the inside of the casing 15.

  Although the hole 191 of the ring member 19 according to the present embodiment is circular, it may be oval. In this case, the major axis of the ellipse is preferably not more than the maximum distance d4 among the distances between adjacent ribs. As a result, even if the ribs 16-1, 16-2, 16-3, 16-4 have a space on the surface opposite to the surface connected to the casing, the hole 191 provided in the ring member 19 is provided. The particle size of the foreign matter flowing in through can be reduced to a distance d4 or less. Moreover, although the hole 191 of the ring member 19 which concerns on this embodiment is a circle | round | yen where the outer periphery of a hole is smooth, there may be unevenness | corrugation in the outer periphery of a hole. Thus, the hole 191 of the ring member 19 according to the present embodiment may be substantially circular (including a circle and an ellipse).

  In each embodiment, the number of ribs is four as an example, but may be two or three, may be five or more, and the number of ribs may be plural. Here, when the number of ribs is two, the maximum distance among the distances between adjacent ribs is the distance between the two ribs. Further, in each embodiment, the relationship between the distances between adjacent ribs is partially different (d3 <d1 = d2 <d4), but the distances between adjacent ribs may all be the same (d1 = d2). = D3 = d4), and they may all be different (d1 ≠ d2 ≠ d3 ≠ d4).

  As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  1, 2: 3, pump device, 10: electric motor, 11: underwater cable, 12: armature, 1: output shaft, 122: rotor, 123: stator, 13: rotating shaft, 14: impeller, 15: casing, 151: suction port, 16: rib, 17: discharge port, 18: sealing member, 19: ring member, 191: hole.

Claims (4)

An electric motor,
A casing provided with a suction port for sucking liquid and provided with a discharge port through which the liquid is discharged;
An impeller provided in the casing and to which a rotational torque of the electric motor is transmitted;
A plurality of ribs provided on the outer wall of the casing so as to partially block the suction port;
With
By rotating the impeller, a flow path is formed in which liquid is sucked from the suction port and the sucked liquid is discharged from the discharge port,
The suction port blade tip diameter of the impeller is not less than the maximum distance among the distances between the adjacent ribs. The pump device according to claim 1, wherein an opening diameter of the suction port is equal to or larger than a suction port blade tip diameter of the impeller. The pump device according to claim 1, further comprising a sealing member that is connected to the plurality of ribs on a surface opposite to a surface where the plurality of ribs are connected to the casing. A ring member which is provided with a substantially circular hole and which is connected to the plurality of ribs on a surface opposite to the surface where the plurality of ribs are connected to the casing;
The pump device according to claim 1, wherein a diameter of the hole is equal to or less than a maximum distance among distances between the adjacent ribs.

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