JP2017180374A - Pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump device which inhibits fixed blades of a guide blade from deforming and collapsing and prevents contact between the fixed blades and an impeller.SOLUTION: A guide blade 45 is disposed at an outer periphery side of an impeller 40 in a pump casing 25. The guide blade 45 has: a ring shaped fixed substrate 46; fixed blades 47 which are provided protruding on a lower surface side of the fixed substrate 46 so as to be spaced away from each other in a circumferential direction; and a ring shaped connection part 48 connecting lower end parts of the fixed blades 47.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pump device.

  2. Description of the Related Art Conventionally, a sewage sewage intake / exhaust pump device is known that is used for intake / exhaust treatment of spring water and pool water at a construction site (see, for example, Patent Document 1).

  Patent Document 1 includes an impeller and guide vanes arranged on the outer peripheral side of the impeller, and pushes priming water around the impeller radially outward by centrifugal force when the impeller rotates. The structure which pressure-reduced by this and sucked in sewage from a suction inlet is disclosed.

  The sucked sewage is pushed out to the side of the impeller by centrifugal force, and is pushed out into the outer casing through the guide vanes. When this operation is continuously repeated and the inside of the outer casing is filled with sewage, the sewage is discharged from the discharge port.

JP-A-2-199295

  However, in the conventional pump device, since the guide vanes protrude from one side of the ring plate, the temperature inside the pump casing rises when the guide vanes are made of, for example, a resin material. Or the fluid pressure of the sewage acts on the guide vanes, and the guide vanes may be deformed. And when a guide blade | wing deform | transforms and the amount of falling becomes large, there exists a possibility that a guide blade | wing and an impeller may contact.

  This invention is made | formed in view of this point, The objective is to suppress that the fixed blade | wing of a guide blade | wing deform | transforms and falls down and to prevent that a fixed blade | wing and an impeller contact.

  The present invention is directed to a pump device including an impeller disposed in a pump casing and guide vanes disposed on the outer peripheral side of the impeller, and the following solution is taken.

  That is, in the first invention, the guide blade includes a fixed substrate, a plurality of fixed blades projecting on one side of the fixed substrate at intervals in the circumferential direction, and a projecting side of the plurality of fixed blades. It has a connection part which connects end parts of these.

  In 1st invention, the edge parts by the side of the protrusion in several fixed blade | wings are connected by the connection part. As a result, even if the temperature inside the pump casing rises or the fluid pressure of water acts on the fixed blades, the fixed blades support each other by the connecting portion, thereby preventing the fixed blades from being deformed and falling down. Can do.

According to a second invention, in the first invention,
The pump casing is provided with a restricting portion for restricting movement of the connecting portion in the radial direction.

  In the second invention, since the connecting portion of the guide blade is regulated so as not to move in the radial direction in the pump casing, the deformation of the fixed blade can be suppressed more reliably.

According to a third invention, in the second invention,
The restricting portion is formed by a stepped portion that is formed to have a stepped inner surface of the pump casing and is in contact with at least one of an inner peripheral surface and an outer peripheral surface of the connecting portion. .

  In 3rd invention, the level | step-difference part is formed because the inner surface of a pump casing sinks in a step shape. The step portion is in contact with at least one of the inner peripheral surface and the outer peripheral surface of the connecting portion, thereby restricting the guide blade from moving within the pump casing. Further, when the guide blade is incorporated in the pump casing, the guide blade and the pump casing can be aligned by bringing the connecting portion and the stepped portion into contact with each other.

According to a fourth invention, in the second invention,
The connecting portion protrudes in the protruding direction of the fixed blade from the end portion on the protruding side of the fixed blade,
The restricting portion is formed by an insertion groove formed on the inner surface of the pump casing and into which the connecting portion is fitted.

  In the fourth invention, the connecting portion of the guide blade is fitted into the fitting groove of the pump casing. Thereby, when incorporating a guide blade | wing in a pump casing, position alignment with a guide blade | wing and a pump casing can be performed. Further, since the guide blade is regulated so as not to move in the pump casing by fitting the connecting portion into the fitting groove, the deformation of the fixed blade can be suppressed more reliably.

  According to the present invention, even if the temperature inside the pump casing rises or the fluid pressure of water acts on the fixed blades, the fixed blades are deformed and fall down because the fixed blades support each other by the connecting portion. Can be suppressed.

It is side surface sectional drawing which shows the structure of the pump apparatus which concerns on this Embodiment 1. It is a perspective view when a guide blade is viewed from below. It is a perspective view when a guide blade is viewed from above. It is side surface sectional drawing which shows the structure of the pump apparatus which concerns on this Embodiment 2. It is side surface sectional drawing when making the internal peripheral surface of the connection part of a guide blade contact | abut on the level | step-difference part of a pump casing. It is side surface sectional drawing which shows the structure of the pump apparatus which concerns on this Embodiment 3. It is side surface sectional drawing when making the outer peripheral surface of the connection part of a guide blade contact | abut on the level | step-difference part of a pump casing. It is side surface sectional drawing which shows the structure of the pump apparatus which concerns on this Embodiment 4. It is side surface sectional drawing when fitting the connection part of a guide blade | wing in the fitting groove | channel of a pump casing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

Embodiment 1
As shown in FIG. 1, the pump device 10 includes an outer casing 20 and an inner casing 30 accommodated in the outer casing 20. A predetermined gap is provided in the circumferential direction between the outer casing 20 and the inner casing 30, and a discharge passage 53 described later is formed by this gap.

  The outer casing 20 includes a casing body 21, a pump casing 25 disposed below the casing body 21, and a mechanical seal bracket 23 that connects the casing body 21 and the pump casing 25 in a liquid-tight manner to hold a mechanical seal. And have.

  A carrying handle 11 is attached to the upper portion of the casing body 21. Also. A cable 12 for power supply is routed from the upper part of the casing body 21.

  A plurality of leg portions 18 are arranged on the outer peripheral portion of the lower surface side of the pump casing 25 with a gap in the circumferential direction. The leg 18 is made of a rubber material for vibration control and protrudes downward from the pump casing 25.

  The inner casing 30 includes a motor casing 31 in which the motor 35 is accommodated, and a head cover 32 that covers the upper portion of the motor casing 31.

  The motor 35 includes a stator 36, a rotor 37, and a rotating shaft 38 that rotates together with the rotor 37. The rotary shaft 38 extends in the vertical direction, and the rotary shaft 38 is supported by the bearing 15 so as to be rotatable up and down the rotor 37. The lower end portion of the rotating shaft 38 passes through the bottom portion of the inner casing 30 and protrudes into the pump casing 25. An impeller 40 is attached to a lower end portion of the rotation shaft 38 by an impeller nut 43.

  The impeller 40 includes a disk-shaped rotating substrate 41 and a plurality of rotating blades 42 protruding from the lower surface side of the rotating substrate 41 at intervals in the circumferential direction. The rotary blade 2 is formed in a spiral shape. The impeller 40 is disposed with a predetermined gap with respect to the bottom surface of the pump casing 25. In the pump casing 25, guide blades 45 are disposed on the outer peripheral side of the impeller 40.

  As shown in FIGS. 2 and 3, the guide blade 45 includes a ring-shaped fixed substrate 46, a plurality of fixed blades 47 projecting from the lower surface side of the fixed substrate 46 in the circumferential direction, and a plurality of guide blades 45. And a ring-shaped connecting portion 48 that connects lower end portions of the fixed blades 47. The fixed substrate 46, the fixed blade 47, and the connecting portion 48 are integrally formed of a resin material such as urethane resin.

  The outer peripheral edge of the fixed substrate 46 protrudes outward in the radial direction from the outer peripheral position of the plurality of fixed blades 47. The fixed substrate 46 is attached to the upper surface side of the pump casing 25. The fixed blade 47 is formed in a spiral shape that is opposite to the spiral direction of the impeller 40.

  The connecting portion 48 is formed substantially concentrically with the ring-shaped fixed substrate 46, and connects the portions of the fixed blade 47 closer to the inner peripheral side. The lower surface of the connecting portion 48 is flush with the lower end surface of the fixed blade 47.

  In this way, by connecting the lower ends of the plurality of fixed blades 47 with the connecting portion 48, for example, even if the temperature inside the pump casing 25 rises or the fluid pressure of water acts on the fixed blade 47, the connection Since the fixed blades 47 support each other by the portion 48, the fixed blades 47 can be prevented from being deformed and falling down.

  A discharge port 16 that communicates with a discharge passage 53 between the outer casing 20 and the inner casing 30 is provided at an upper portion of the casing body 21. A discharge hose 51 is connected to the discharge port 16. On the other hand, a suction passage 26 is provided on the lower surface side of the pump casing 25.

  The suction passage 26 is formed by a substantially L-shaped passage that extends radially outward from the center portion on the lower surface side of the pump casing 25 and then bends upward along the outer peripheral wall of the pump casing 25. Yes.

  Specifically, a recess 27 in which the bottom surface of the pump casing 25 is recessed and a bottom surface cover 28 that covers the recess 27 from the bottom surface side form a passage extending outward in the radial direction. A passage that bends and extends upward is formed by a through-hole 29 that penetrates the outer periphery of the pump casing 25 in the vertical direction. A suction port 17 is provided at the upstream end of the suction passage 26. A suction hose 52 is connected to the suction port 17.

  An opening 25 a that communicates the suction passage 26 and the pump casing 25 is formed at the center of the pump casing 25 facing the impeller 40. The pump casing 25 is formed with a communication hole 25 b that communicates with the suction passage 26 in the middle thereof.

  Hereinafter, a procedure for performing a sewage intake / exhaust process using the pump device 10 according to the present embodiment will be described. First, as shown in FIG. 1, priming water is accommodated in the outer casing 20 up to a position corresponding to the water surface position H.

  Next, the impeller 40 is rotated by rotating the rotating shaft 38 by driving the motor 35, and the priming water around the impeller 40 is pushed radially outward, that is, laterally by the centrifugal force. The central portion of the car 40 is decompressed. Due to the suction action due to the decompression, the sewage is sucked into the suction hose 52 from the tip of the suction hose 52, and is sequentially sucked into the peripheral portion of the impeller 40 through the suction port 17 and the suction passage 26.

  Further, the sewage is pushed out to the side of the impeller 40 by centrifugal force, passes between the plurality of fixed vanes 47 of the guide vane 45, and pushed out to the outer peripheral portion in the outer casing 20.

  On the other hand, the air sucked together with the sewage is guided upward through a discharge passage 53 formed between the outer casing 20 and the inner casing 30. When such an operation is repeated and the discharge passage 53 in the outer casing 20 is filled with sewage, sewage is discharged from the discharge port 16 through the discharge hose 51.

  In addition, since a communication hole 25b is formed at a position radially outward of the guide blade 45 at the bottom of the pump casing 25, the priming water in the suction passage 26 is impeller 40 in the initial driving of the pump device 10. When the air is sucked into the suction passage 26 through the communication hole 25b and is sucked into the suction passage 26 through the communication hole 25b, the blades are re-inserted again while entraining air. It is sucked into the car 40 and pushed out to the side. Thereby, the suction performance of air can be improved significantly by using the priming water effectively.

<< Embodiment 2 >>
FIG. 4 is a side sectional view showing the configuration of the pump device according to the second embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.

  As shown in FIG. 4, the guide blade 45 includes a ring-shaped fixed substrate 46, a plurality of fixed blades 47 protruding on the lower surface side of the fixed substrate 46 at intervals in the circumferential direction, and a plurality of fixed blades 47. And a ring-shaped connecting portion 48 for connecting the lower end portions of each other.

  The connecting portion 48 is formed substantially concentrically with the ring-shaped fixed substrate 46, and connects the portions of the fixed blade 47 closer to the inner peripheral side. The lower surface of the connecting portion 48 is flush with the lower end surface of the fixed blade 47.

  The pump casing 25 is provided with a restricting portion 55 that restricts the movement of the connecting portion 48 in the radial direction. Specifically, the restricting portion 55 is configured by a step portion 56 in which the inner surface of the pump casing 25 is recessed in a step shape.

  The stepped portion 56 is continuous on the inner wall surface on the lower side of the pump casing 25 from a position substantially coincident with the inner peripheral surface of the connecting portion 48 in a plan view to a position near the outer peripheral wall of the pump casing 25 in the radial direction. Indented.

  Therefore, when the guide blade 45 is incorporated in the pump casing 25, the inner peripheral surface of the connecting portion 48 comes into contact with the peripheral wall portion of the step portion 56. Thereby, the guide blade 45 is regulated so as not to move in the pump casing 25, so that the deformation of the fixed blade 47 can be more reliably suppressed.

  Further, as shown in FIG. 5, when the guide blade 45 is incorporated into the pump casing 25, the guide blade 45 and the pump casing 45 are fitted by fitting the connecting portion 48 of the guide blade 45 into the stepped portion 56 of the pump casing 25. 25 can be aligned.

<< Embodiment 3 >>
FIG. 6 is a side sectional view showing the configuration of the pump device according to the third embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.

  As shown in FIG. 6, the guide blade 45 includes a ring-shaped fixed substrate 46, a plurality of fixed blades 47 protruding on the lower surface side of the fixed substrate 46 at intervals in the circumferential direction, and a plurality of fixed blades 47. And a ring-shaped connecting portion 48 for connecting the lower end portions of each other.

  The connecting portion 48 is formed substantially concentrically with the ring-shaped fixed substrate 46, and connects the portions of the fixed blade 47 closer to the inner peripheral side. The connecting portion 48 protrudes downward from the lower end portion of the fixed blade 47.

  The pump casing 25 is provided with a restricting portion 55 that restricts the movement of the connecting portion 48 in the radial direction. Specifically, the restricting portion 55 is configured by a step portion 56 in which the inner surface of the pump casing 25 is recessed in a step shape.

  The step portion 56 is continuously depressed on the inner wall surface on the lower side of the pump casing 25 from the center portion of the pump casing 25 radially outward to a position substantially coincident with the outer peripheral surface of the connecting portion 48 in plan view. It is.

  Therefore, when the guide blade 45 is incorporated in the pump casing 25, the outer peripheral surface of the connecting portion 48 comes into contact with the peripheral wall portion of the step portion 56. Thereby, the guide blade 45 is regulated so as not to move in the pump casing 25, so that the deformation of the fixed blade 47 can be more reliably suppressed.

  Further, as shown in FIG. 7, when the guide blade 45 is incorporated into the pump casing 25, the guide blade 45 and the pump casing 45 are fitted by fitting the connecting portion 48 of the guide blade 45 into the stepped portion 56 of the pump casing 25. 25 can be aligned.

<< Embodiment 4 >>
FIG. 8 is a side sectional view showing the configuration of the pump device according to the fourth embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.

  As shown in FIG. 8, the guide blade 45 includes a ring-shaped fixed substrate 46, a plurality of fixed blades 47 projecting from the lower surface side of the fixed substrate 46 at intervals in the circumferential direction, and a plurality of fixed blades 47. And a ring-shaped connecting portion 48 for connecting the lower end portions of each other.

  The connecting portion 48 is formed substantially concentrically with the ring-shaped fixed substrate 46, and connects the portions of the fixed blade 47 closer to the inner peripheral side. The connecting portion 48 protrudes downward from the lower end portion of the fixed blade 47.

  The pump casing 25 is provided with a restricting portion 55 that restricts the movement of the connecting portion 48 in the radial direction. Specifically, the restricting portion 55 is formed by a ring-shaped fitting groove 57 that is formed on the inner wall surface on the lower side of the pump casing 25 and into which the connecting portion 48 is fitted.

  As shown in FIG. 9, when the guide blade 45 is assembled in the pump casing 25, the guide blade 45 and the pump casing 25 are fitted by fitting the connecting portion 48 of the guide blade 45 into the fitting groove 57 of the pump casing 25. Can be aligned.

  Moreover, since the guide blade 45 is regulated so as not to move in the pump casing 25 by fitting the connecting portion 48 into the fitting groove 57, the deformation of the fixed blade 47 can be suppressed more reliably.

  As described above, the present invention provides a highly practical effect that can prevent the fixed blades of the guide blades from being deformed and falling down and prevent the fixed blades and the impeller from coming into contact with each other. Therefore, it is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Pump apparatus 25 Pump casing 40 Impeller 45 Guide blade 46 Fixed board | substrate 47 Fixed blade 48 Connection part 55 Control part 56 Step part 57 Insertion groove

Claims (4)

A pump device comprising an impeller disposed in a pump casing, and guide blades disposed on an outer peripheral side of the impeller,
The guide blades connect a fixed substrate, a plurality of fixed blades projecting on one side of the fixed substrate at intervals in the circumferential direction, and end portions on the projecting side of the plurality of fixed blades The pump apparatus characterized by having a part. In claim 1,
The pump device according to claim 1, wherein the pump casing is provided with a restricting portion for restricting movement of the connecting portion in the radial direction. In claim 2,
The pumping device is characterized in that the restricting portion is formed by a stepped portion formed such that an inner surface of the pump casing is recessed in a stepped shape and abuts against at least one of an inner peripheral surface and an outer peripheral surface of the connecting portion. In claim 2,
The connecting portion protrudes in the protruding direction of the fixed blade from the end portion on the protruding side of the fixed blade,
The said restriction | limiting part is comprised by the insertion groove | channel which is formed in the inner surface of the said pump casing and the said connection part is engage | inserted, The pump apparatus characterized by the above-mentioned.

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