WO2010001627A1 - Roue à aubes pour pompe centrifuge - Google Patents

Roue à aubes pour pompe centrifuge Download PDF

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Publication number
WO2010001627A1
WO2010001627A1 PCT/JP2009/003126 JP2009003126W WO2010001627A1 WO 2010001627 A1 WO2010001627 A1 WO 2010001627A1 JP 2009003126 W JP2009003126 W JP 2009003126W WO 2010001627 A1 WO2010001627 A1 WO 2010001627A1
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WO
WIPO (PCT)
Prior art keywords
impeller
balance weight
lid
impeller body
end surface
Prior art date
Application number
PCT/JP2009/003126
Other languages
English (en)
Japanese (ja)
Inventor
樽井基展
竹内一喜
榎本純也
田中伸和
Original Assignee
新明和工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新明和工業株式会社 filed Critical 新明和工業株式会社
Priority to US13/002,072 priority Critical patent/US20110182734A1/en
Priority to CA2729815A priority patent/CA2729815A1/fr
Publication of WO2010001627A1 publication Critical patent/WO2010001627A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/662—Balancing of rotors

Definitions

  • the technology disclosed here relates to an impeller for a centrifugal pump.
  • centrifugal pumps are used to transport sewage and the like.
  • various impellers attached to the centrifugal pump a non-clog type impeller in which a flow path connecting an inlet opening on one end surface and an outlet opening on a peripheral surface is formed inside thereof is It is known as an impeller that hardly clogs even in sewage containing solid matter (see, for example, Patent Document 1).
  • the non-clog type impeller is a single blade, the shape becomes non-axisymmetric with respect to the rotation axis. Therefore, in the impeller disclosed in Patent Document 1, a static balance when stationary and a dynamic balance when rotating in the air (hereinafter collectively referred to as mechanical balance) are gradually increased. I am meat. With such a gradual thickness, the substantially cylindrical impeller has a recessed portion that opens to the other end surface opposite to the one end surface where the inlet is formed and that is recessed from the other end surface in the cylinder axis direction. It is formed.
  • a recessed portion that opens to the other end surface and is recessed from the other end surface in the cylinder axis direction May be formed.
  • centrifugal pump impeller disclosed here is an impeller that is advantageous in simplifying the mounting structure of the lid attached to the impeller body and simplifying the assembling work.
  • the inventors of the present application pay attention to the engagement structure between the impeller main body and the lid, and simply engage the impeller main body with the lid through the engaging portion and engage with the impeller main body.
  • a balance weight is sandwiched between the lid body and the impeller body, and the balance weight is fixed to the impeller body.
  • An exemplary centrifugal pump impeller has a substantially cylindrical shape including one end surface and the other end surface opposed to the cylinder axis direction, and a peripheral surface between the one end surface and the other end surface, and opens to the one end surface.
  • An impeller body formed by forming an internal flow path connecting an inlet and an outlet opening in the peripheral surface, and a recessed portion that opens in the other end surface and is recessed in the cylinder axis direction from the other end surface;
  • a lid that covers the opening of the recessed portion so that the other end surface of the impeller body is flat by being attached to the other end surface, and is disposed between the impeller body and the lid body.
  • Balance weight is provided by forming an internal flow path connecting an inlet and an outlet opening in the peripheral surface, and a recessed portion that opens in the other end surface and is recessed in the cylinder axis direction from the other end surface.
  • the lid is attached and fixed to the impeller body via an engaging portion, and a pressing portion for the balance weight is formed on the back surface thereof.
  • the balance weight is formed by the lid body. Along with being fixedly attached to the impeller body, it is sandwiched and fixed by the pressing portion of the lid and the impeller body.
  • the lid is attached and fixed to the impeller body via the engaging portion.
  • the balance weight is sandwiched between the pressing portion of the lid and the impeller body, and the balance weight is attached and fixed. That is, the attachment of the lid and the attachment of the balance weight are performed at the same time, and the assembly work of the impeller is simplified.
  • FIG. 1 is a cross-sectional view of a submersible pump with an exemplary centrifugal pump impeller.
  • FIG. 2 is a perspective view of the impeller.
  • FIG. 3 is a front view of the impeller.
  • FIG. 4 is a bottom view of the impeller.
  • 5 is a cross-sectional view taken along the line VV of FIG.
  • FIG. 6 is a plan view of the impeller body with the lid removed.
  • FIG. 9 is an enlarged plan view showing the vicinity of the boss portion of the impeller body.
  • FIG. 10 is an enlarged sectional view showing the vicinity of the boss portion of the impeller body.
  • FIG. 11 is a perspective view of the upper balance weight.
  • FIG. 12 is a perspective view of the lower balance weight.
  • An exemplary centrifugal pump impeller has a substantially cylindrical shape including one end surface and the other end surface opposed to the cylinder axis direction, and a peripheral surface between the one end surface and the other end surface, and opens to the one end surface.
  • An impeller body formed by forming an internal flow path connecting an inlet and an outlet opening in the peripheral surface, and a recessed portion that opens in the other end surface and is recessed in the cylinder axis direction from the other end surface;
  • a lid that covers the opening of the recessed portion so that the other end surface of the impeller body is flat by being attached to the other end surface, and is disposed between the impeller body and the lid body.
  • Balance weight is provided by forming an internal flow path connecting an inlet and an outlet opening in the peripheral surface, and a recessed portion that opens in the other end surface and is recessed in the cylinder axis direction from the other end surface.
  • the lid is attached and fixed to the impeller body via an engaging portion, and a pressing portion for the balance weight is formed on the back surface thereof.
  • the balance weight is formed by the lid. Along with being fixedly attached to the impeller body, it is sandwiched and fixed by the pressing portion of the lid and the impeller body.
  • the balance weight is sandwiched between the pressing portion of the lid body and the impeller body. As a result, the balance weight is attached and fixed. Since the lid and the balance weight are attached at the same time, the assembly work of the impeller is facilitated.
  • the engaging portion is formed in the engaging groove formed in the impeller body or the lid body, and is formed in the lid body or the impeller body, and is elastically deformed when the lid body is attached to the impeller body. It is good also as including including the engaging claw which engages with the engaging groove by doing.
  • the engaging groove and the engaging claw can be engaged with each other without using a tool or the like. Therefore, when attaching a cover to an impeller main body, a tool etc. become unnecessary and the assembly operation
  • a plurality of pins project from the back surface of the lid body, and the impeller body has a plurality of pin holes into which the pins are respectively fitted and open to the other end surface. Good.
  • the lid is positioned with respect to the impeller body by making the positions of the pin and the pin hole coincide with each other.
  • the lid body is more firmly fixed to the impeller body in combination with the engagement by the engagement portion.
  • Each said pin hole is formed in each boss part provided in the other end surface of the impeller body, and the peripheral surface of the boss part became convex toward the radially outward direction of the boss part.
  • a plurality of protrusions are formed at intervals in the circumferential direction, and the balance weight is larger than the diameter of the boss portion and larger than the diameter of a circle formed by connecting the ends of the plurality of fitting protrusions.
  • An outer fitting hole having a small diameter is formed, and the balance weight is attached to the impeller body by fitting the outer fitting holes of the balance weight to the boss portions so as to crush the protrusions.
  • the fixed portion of the lid body may be formed in an annular shape so as to surround the pin, and thereby configured to press around the outer fitting hole of the balance weight.
  • the balance weight can be accurately positioned at a predetermined position with respect to the impeller body by externally fitting each outer fitting hole of the balance weight to the boss portion of the impeller body. Also, the balance weight play is generated by fitting each outer fitting hole of the balance weight with the boss part of the impeller body and pressing the periphery of the outer fitting hole with the holding part of the lid. The balance weight can be firmly fixed to the impeller body while preventing the above.
  • a plurality of reinforcing ribs extending in the radial direction are formed in the recessed portion of the impeller body, and the end surface on the other end side in the cylinder axis direction of each reinforcing rib is a mounting on which the balance weight is mounted.
  • the boss portions may be formed integrally with the reinforcing ribs on the mounting surfaces of the reinforcing ribs.
  • Reinforcing ribs improve the strength of the impeller body. Further, by forming the boss part integrally with the reinforcing rib, the rigidity of the boss part is improved, and the balance weight is more stably fixed to the impeller body.
  • FIG. 1 shows a submersible pump 1 with an exemplary impeller.
  • the submersible pump 1 includes a pump unit 21 having an impeller 6 and a motor unit 22 having a motor 3 that drives the impeller 6.
  • the submersible pump 1 is configured such that the pump unit 21 and the motor unit 22 are arranged side by side in the vertical direction by disposing the pump unit 21 on the lower side of the oil casing 23 and the motor unit 22 on the upper side. ing.
  • the submersible pump 1 is a lightweight type in which a later-described head cover 34 and pump casing 4 are formed of a predetermined resin material.
  • the motor unit 22 includes the motor 3 including a stator 31 and a rotor 32, a stator casing 33 that covers the stator 31 of the motor 3, and a head cover 34 that is attached to the upper end of the stator casing 33.
  • the rotation shaft 35 of the motor 3 extends in the vertical direction.
  • the stator casing 33 has a substantially cylindrical shape with openings at both ends.
  • the upper end opening of the stator casing 33 is closed by a motor cover 36, and the motor cover 36 has a bearing 35 a that rotatably supports the upper end portion of the rotating shaft 35 on the lower surface thereof.
  • the head cover 34 is attached to the upper end of the stator casing 33.
  • the head cover 34 includes an upper wall and a peripheral wall that extends downward from the peripheral edge of the upper wall and is fixed to the upper end of the stator casing 33, and has a cross-sectional shape formed in an inverted U shape.
  • the head cover 34 forms an accommodation space 34a for accommodating various electrical components together with the motor cover 36 therein.
  • a cable boot through which a power supply cable for supplying power to the motor 3 is inserted is attached to the upper wall of the head cover 34, and a handle 34b is attached to the center of the upper surface thereof.
  • the head cover 34 is fixed to the oil casing 23 by a plurality of bolts 37 (only one is shown in the figure) arranged at predetermined intervals in the circumferential direction.
  • the bolt 37 that has passed through the through hole formed in the peripheral edge of the head cover 34 passes through the motor cover 36 and extends downward along the inner peripheral surface of the stator casing 33, so that the peripheral edge of the oil casing 23. It is screwed to the part.
  • the head cover 34, the stator casing 33, and the motor cover 36 are fixed to the oil casing 23 at once by the long bolts 37 extending in the vertical direction. This configuration enables the number of parts of the submersible pump 1 to be reduced and the number of assembly steps to be reduced.
  • the oil casing 23 is attached to the lower end of the stator casing 33, and the lower end opening of the stator casing 33 is closed by the oil casing 23.
  • the oil casing 23 forms an oil chamber 53 filled with lubricating oil together with the pump casing 4.
  • the oil casing 23 is formed with a through hole into which the rotating shaft 35 of the motor 3 is inserted, and a bearing 35b that rotatably supports an intermediate portion of the rotating shaft 35 is attached to the upper surface thereof.
  • the rotary shaft 35 is sealed with a mechanical seal 51, and an annular wall 52 that surrounds substantially the entire outer periphery of the mechanical seal 51 is provided. It has been.
  • the pump unit 21 includes an impeller 6 attached to the lower end of the rotating shaft 35 of the motor 3 and a pump casing 4.
  • the submersible pump 1 is a centrifugal pump.
  • an upper first pump casing 41 and a lower second pump casing 42, which form an oil chamber 53 together with an oil casing 23, are integrated by welding. Is made up of.
  • the pump 1 is downsized.
  • a through hole into which the rotary shaft 35 is inserted is formed, and a vortex chamber 43 for accommodating the impeller 6 is formed therein.
  • the lower part of the pump casing 4 is opened downward, and a liner ring 44 having an opening 44a for supporting the wear ring part 692 which is the lower end part of the impeller 6 is attached to the opening. It has been.
  • a discharge portion 45 that protrudes laterally and curves upward is integrally formed on the side portion of the pump casing 4.
  • the discharge portion 45 communicates with the spiral chamber 43 and has a discharge port 45a that opens upward.
  • the discharge port 45a is connected to a discharge pipe (not shown).
  • the stand 7 includes a main body portion 71 made of synthetic resin and a rubber cover 72 that covers the lower side of the main body portion 71.
  • the lower end of each leg portion 46 is formed on the main body portion 71.
  • An insertion portion 73 that is inserted and fixed with a screw protrudes upward and is integrally formed.
  • a damping rubber or damping steel plate 74 is interposed between the lower surface of each leg portion 46 and the insertion portion 73.
  • This stand 7 fulfills both the function of preventing the displacement of the installation position of the submersible pump 1 by the cover 72 and the function of damping when the submersible pump 1 is driven by the damping rubber or damping steel plate 74. become.
  • the impeller 6 is a non-clog type impeller having a substantially cylindrical shape as shown in FIGS. 2 to 5, and the rotating shaft 35 is arranged so that the cylindrical shaft and the rotating shaft 35 are coaxial. It is being fixed with respect to the lower end of (refer FIG. 1).
  • the impeller 6 includes an impeller body 61 and a lid body 62 attached to the upper end surface of the impeller body 61.
  • the impeller 6 includes an upper balance weight 63 and a lower balance weight 64 in order to obtain the mechanical balance and hydraulic balance.
  • the upper balance weight 63 is disposed and fixed between the impeller body 61 and the lid body 62
  • the lower balance weight 64 is a wear ring portion of the impeller body 61. 692 is buried.
  • the impeller body 61 has a substantially cylindrical shape, and an inlet 601 that opens downward is formed at a lower end surface of the impeller body 61, while an opening toward the side is formed at a predetermined position on the peripheral surface.
  • An outlet 602 is formed.
  • an internal channel 603 extending in the cylinder axis direction is formed inside the impeller 6, and the inlet 601 and the outlet 602 are connected to each other by the internal channel 603.
  • An outer flow path 604 that is recessed inward in the radial direction is formed on the outer peripheral surface of the impeller body 61.
  • the external flow path 604 is not a flow path extending in the cylinder axis direction, and the flow path center is located on an orthogonal plane orthogonal to the cylinder axis of the impeller body 61.
  • the external flow path 604 is continuous with the downstream side of the internal flow path 603 at the outlet 602, and circulates over the length of one round of the impeller 6.
  • the external channel 604 is partitioned by the blade 605.
  • This blade 605 is a so-called radial flow type single blade (centrifugal blade), and the centrifugal blade 605 pressurizes the water in the external flow path 604 and discharges it to the outer peripheral side (radially outward).
  • a first flange portion 681 protruding outward in the radial direction is formed over the entire circumference above the external flow path 604. Further, a second flange portion 682 that protrudes outward in the radial direction over the entire circumference is formed below the external flow path 604.
  • the second flange portion 682 divides the lower portion of the impeller 6 where the inlet 601 is formed from the upper portion where the outlet 602 is formed. That is, the impeller 6 is a closed type impeller in which the inlet 601 and the outlet 602 are partitioned by the second flange portion 682.
  • a shaft support portion 691 is formed to protrude upward at the center position.
  • the shaft support portion 691 is made of a predetermined metal material, and has an attachment hole in which the rotation shaft 35 of the motor 3 is inserted and fixed.
  • a wear ring portion 692 inserted into the opening 44a of the pump casing 4 is formed on the impeller body 61 below the second flange portion 682 so as to protrude downward.
  • the impeller body 61 is set such that the diameters of the first and second flange portions 681 and 682 are small so that the diameter is as small as possible. .
  • the design has almost no step between the second flange portion 682 and the wear ring portion 692.
  • the diameters of the first and second flange portions 681 and 682 may be further reduced so that this step is eliminated.
  • the step between the second flange portion 682 and the wear ring portion 692 may be eliminated by enlarging the diameter of the wear ring portion 692 so that the diameter of the inlet 601 is increased.
  • the impeller body 61 is made of synthetic resin, and has a substantially constant thickness to prevent sink marks during molding, as shown in FIGS.
  • a recessed portion 611 that is recessed is formed. As shown in FIG. 6, the recessed portion 611 extends in the circumferential direction by about 3 ⁇ 4 turn counterclockwise from the side where the outlet 602 opens (upper side in FIG. 6). Further, as shown in FIG. 5, the recessed portion 611 has a relatively shallow depth on the opening side of the outlet 602 (right side in FIG. 5), and is opposite to the opening side of the outlet 602 (left side in FIG. 5). ) Is configured to be relatively deep.
  • a reinforcing rib 612 is formed at the upper end portion of the impeller body 61 so as to connect the shaft support portion 691 and the peripheral portion of the impeller body 61 to each other by extending in the radial direction.
  • three reinforcing ribs 612 are formed in the upper half region corresponding to the opening side of the outlet 602 with a predetermined angle therebetween,
  • One reinforcing rib 612 is formed in the lower half region corresponding to the side opposite to the opening side of the outlet 602.
  • three of the total four reinforcing ribs 612 are disposed in the recessed portion 611.
  • Each of the three reinforcing ribs 612 disposed on the opening side of the outlet 602 also serves as a mounting portion on which the upper balance weight 63 is mounted, as shown in FIG. That is, the upper end surface of each reinforcing rib 612 functions as a mounting surface 614 on which the upper balance weight 63 is mounted. Furthermore, a boss portion 613 for fixing the upper balance weight 63 is formed at a substantially central position in the radial direction of each reinforcing rib 612.
  • the boss portion 613 is a portion having a diameter larger than the width of the reinforcing rib 612 and having a circular shape in a plan view.
  • a pin hole 615 extending in the direction is formed.
  • three protrusions 616 protruding outward in the radial direction are formed integrally with the boss portion 613 at equal intervals in the circumferential direction.
  • the upper balance weight 63 made of a predetermined metal material has a substantially sector shape in which an annular plate member having a predetermined plate thickness is cut out by a predetermined angle range.
  • the upper balance weight 63 has a horizontal shape in which the radial width is larger than the thickness in the cylinder axis direction (vertical direction).
  • the upper balance weight 63 is disposed between the shaft support portion 691 and the peripheral portion of the impeller body 61, so that the inner diameter thereof is larger than the diameter of the shaft support portion 691.
  • the outer diameter is set smaller than the diameter of the peripheral edge of the impeller body 61.
  • the shape of the upper balance weight 63 is not particularly limited, and is appropriately set so as to ensure a necessary weight under the restriction that the upper balance weight 63 is disposed between the impeller body 61 and the lid body 62. That's fine.
  • three holes 631 are formed penetrating in the thickness direction so as to correspond to the three boss portions 613, respectively. These holes are external fitting holes 631 that are externally fitted to the boss portion 613. As shown in FIG. 9, the hole diameter is larger than the diameter of the boss portion 613 and the tip of the projection 616. The diameter is set smaller than the diameter of the circle connecting the two.
  • the upper balance weight 63 is arranged on the mounting surface 614 of the reinforcing rib 612 so that each outer fitting hole 631 is fitted to the boss portion 613 as shown in an enlarged view in FIGS. Accordingly, the upper balance weight 63 is positioned at a predetermined position on the opening side of the outlet 602 on the upper end surface of the impeller body 61.
  • the outer fitting hole 631 of the upper balance weight 63 is set to have a diameter that is larger than the diameter of the boss portion 613 and smaller than the diameter of the circle connecting the tips of the protrusions 616. When the part is crushed, the outer fitting hole is fitted onto the boss portion 613. Thereby, the play of the upper balance weight 63 can be eliminated.
  • the lid 62 has a disk shape, and an insertion hole 621 into which the shaft support portion 691 of the impeller body 61 is inserted is formed at the center thereof.
  • the lid 62 is made of a synthetic resin, and the surface side is configured to be a flat surface, while the peripheral edge has a side corresponding to the opening of the outlet 602 and a side opposite to the side across the cylinder shaft.
  • two engaging claws 622 are formed integrally with the lid body 62 at a predetermined interval in the circumferential direction.
  • Each engagement claw 622 is a claw that engages with an engagement groove 683 formed on the peripheral edge portion of the upper end portion of the impeller body 61, and the engagement claw 622 and the engagement groove 683 define a lid.
  • Engaging means for attaching and fixing the body 62 to the impeller body 61 is configured.
  • Three pins 623 are formed on the back surface of the lid 62 so as to protrude from the back surface at positions corresponding to the boss portions 613 of the impeller body 61. As shown in FIG. 10, each pin 623 fits in a pin hole 615 formed in each boss portion 613 when the lid 62 is attached to the impeller body 61. Thus, in addition to the engagement between the engagement claw 622 and the engagement groove 683, the lid body 62 is more stable with respect to the impeller body 61 by fitting each pin 623 into the pin hole 615. Will be fixed.
  • a pressing portion 624 for pressing the upper balance weight 63 is further formed on the back surface of the lid 62 so as to protrude from the back surface.
  • the pressing portion 624 is formed in an annular shape so as to surround each pin 623.
  • the lid body 62 two through holes 625 are formed on each of the opening side of the outlet 602 and the opposite side thereof.
  • This through hole is an air vent hole 625 for extracting air from the recessed portion 611 of the impeller body 61 and filling the recessed portion 611 with water.
  • An air vent hole may also be formed in the upper balance weight 63.
  • the air vent hole is preferably formed at the same position as the air vent hole 625 formed in the lid body 62.
  • the lower balance weight 64 is embedded in the wear ring portion 692 on the opening side of the outlet 602 of the impeller body 61 as shown in FIGS.
  • the lower balance weight 64 made of a predetermined metal material is a plate piece curved in an arc shape, and is a vertical type whose height in the cylinder axis direction is larger than its radial thickness. It has a shape. Then, as shown in FIG. 4, the lower balance weight 64 is embedded in the wear ring portion 692 so that the lower end surface thereof is exposed to the lower end surface of the impeller body 61.
  • Two through holes 641 are formed at predetermined positions in the lower balance weight 64, and each through hole 641 functions as a positioning hole into which the positioning pin 8 of the molding die is inserted. Further, a notch 642 is formed at the center position at the lower end of the lower balance weight 64. When the impeller body 61 is molded by the notch 642, the resin is filled in the notch 642, and as a result, as shown in FIG. The retaining portion 694 that crosses in the thickness direction is formed.
  • the shaft support portion 691 and the lower balance weight 64 are respectively arranged at predetermined positions in a mold (not shown).
  • the lower balance weight 64 has its circumferential position and its inclination defined by the two positioning pins 8.
  • the positioning pin 8 has a small-diameter portion 81 on the distal end side and a large-diameter portion 82 on the proximal end side, and the radial position of the lower balance weight 64 is also defined at the step positions having different diameters. It will be.
  • the lower balance weight 64 can be accurately positioned at a predetermined position in the mold, the lower balance weight 64 can be reliably embedded in the thin wear ring 692 in the impeller body 61.
  • the impeller body 61 is formed by well-known resin molding. As shown in FIGS. 2 and 3, a hole 693 formed by the positioning pin 8 is formed in the wear ring 692 of the impeller body 61 after the molding.
  • a separately prepared upper balance weight 63 is attached to the upper end surface of the impeller body 61 after molding. As described above, the upper balance weight 63 causes the protrusions 616 of the boss portion 613 to be crushed so that the outer fitting holes 631 of the upper balance weight 63 are fitted to the boss portion 613.
  • a separately formed lid 62 is attached to the impeller body 61.
  • the pin 623 of the lid body 62 is fitted into the pin hole 615 of the impeller body 61 and the engagement claw 622 of the lid body 62 is elastically deformed, whereby the engagement groove 683 of the impeller body 61 is formed. Engage with each other.
  • the lid 62 is attached and fixed to the impeller body 61, and at the same time, the pressing portion 624 of the lid 62 presses the upper balance weight 63, thereby the impeller body of the upper balance weight 63.
  • the attachment to 61 is also completed.
  • the impeller 6 of this configuration does not use fastening means such as bolts for fixing the lid 62, but engages the engaging claw 622 with the engaging groove 683, thereby 62 is fixedly attached to the impeller body 61. For this reason, a tool etc. are unnecessary in the assembly operation, and the assembly of the impeller 6 is simplified. At the same time, since the upper balance weight 63 is fixed simultaneously with the attachment of the lid 62, the assembly work of the impeller 6 is further facilitated.
  • the lid 62 is provided on the impeller body 61.
  • the engaging portion does not protrude from the surface of the lid 62, and the upper end surface of the impeller 6 is surely a flat surface. This is advantageous in reducing power loss.
  • the impeller body 61 may be provided with an engaging claw.
  • the engaging portion for engaging the lid 62 and the impeller body 61 is not limited to the combination of the engaging claw 622 and the engaging groove 683, and an appropriate configuration can be adopted. .
  • the peripheral edge portion of the lid body 62 is fixed to the impeller body 61 by the engaging claw 622 and the engaging groove 683, while the pin 623 provided on the lid body 62 is connected to the pin hole 615 of the impeller body 61. It is possible to fix the radially central portion of the lid 62 to the impeller body 61 by being fitted inside. As a result, the central portion of the lid 62 in the radial direction does not float with respect to the impeller body 61.
  • the upper balance weight 63 is accurately placed at a predetermined position with respect to the impeller body 61. It can be positioned and the play of the upper balance weight 63 can be prevented.
  • the reinforcing rib 612 improves the strength of the impeller body 61 itself, and the boss portion 613 for fixing the upper balance weight 63 and the lid body is formed integrally with the reinforcing rib 612 to thereby form the boss portion 613.
  • the rigidity is improved. This is advantageous in securing the upper balance weight 63 and the lid 62 to the impeller body 61 more stably.
  • the lower balance weight 64 has a vertical shape unlike the upper balance weight 63, it is possible to embed it in the thin wear ring 692 in the radial direction.
  • the diameter of the first and second flange portions 681 and 682 is made as small as possible while the diameter of the inlet 601 of the impeller 6 is made as large as possible to ensure predetermined foreign substance passage characteristics.
  • the lower balance weight 64 embedded in the wear ring portion 692 has its lower end exposed at the lower end surface of the impeller body 61, so that the lower balance weight 64 may fall off during use of the impeller 6.
  • the retaining portion 694 is formed by forming the notch 642 at the lower end of the lower balance weight 64, the lower balance weight 64 is reliably prevented from falling off.
  • the retaining portion 694 is configured by forming a notch 642 at the lower end of the lower balance weight 64.
  • the retaining portion 694 is configured by forming a notch 642 at the lower end of the lower balance weight 64.
  • the entire lower balance weight 64 may be embedded in the impeller body 61 so that the lower end of the lower balance weight 64 is not exposed. In such a case, it is not necessary to configure a retaining portion.
  • the lower balance weight 64 is embedded in the wear ring portion 692.
  • the upper end of the lower balance weight 64 may be located at a position corresponding to the second flange portion 682.
  • balance weight 64 is not limited to being embedded in the wear ring portion 692, but may be embedded in an appropriate portion of the peripheral portion of the impeller body 61.
  • the impeller is not limited to a synthetic resin impeller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une roue à aubes comportant un corps de roue à aubes doté d'un passage intérieur d'écoulement et de sections en retrait, un couvercle servant à recouvrir les ouvertures des sections en retrait, et une masselotte d'équilibrage disposée entre le corps de roue à aubes et le couvercle. Le couvercle est rattaché et fixé au corps de roue à aubes avec une pièce de coopération interposée entre ceux-ci. Les sections d'appui sur la masselotte d'équilibrage sont formées sur la surface arrière du couvercle.  La masselotte d'équilibrage est maintenue et immobilisée par les sections d'appui du couvercle et du corps de roue à aubes lorsque le couvercle est rattaché et fixé au corps de roue à aubes.
PCT/JP2009/003126 2008-07-04 2009-07-06 Roue à aubes pour pompe centrifuge WO2010001627A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/002,072 US20110182734A1 (en) 2008-07-04 2009-07-06 Centrifugal pump impeller
CA2729815A CA2729815A1 (fr) 2008-07-04 2009-07-06 Roue a aubes pour pompe centrifuge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008175628A JP2010014047A (ja) 2008-07-04 2008-07-04 遠心ポンプ用羽根車
JP2008-175628 2008-07-04

Publications (1)

Publication Number Publication Date
WO2010001627A1 true WO2010001627A1 (fr) 2010-01-07

Family

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PCT/JP2009/003126 WO2010001627A1 (fr) 2008-07-04 2009-07-06 Roue à aubes pour pompe centrifuge

Country Status (4)

Country Link
US (1) US20110182734A1 (fr)
JP (1) JP2010014047A (fr)
CA (1) CA2729815A1 (fr)
WO (1) WO2010001627A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012207645A (ja) * 2011-03-30 2012-10-25 Sinfonia Technology Co Ltd ファン装置
JP5904900B2 (ja) * 2012-08-07 2016-04-20 株式会社鶴見製作所 水ポンプ用羽根車およびそれを備えた水中モータポンプ
DE102017005283B4 (de) 2017-06-02 2022-12-08 Wilo Se Pumpenlaufrad
KR102219944B1 (ko) * 2020-10-29 2021-02-24 주식회사 신성터보마스터 이물질에 의한 막힘이 없는 단일 채널 수중펌프

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS6429294U (fr) * 1987-08-13 1989-02-21
JPH0544700A (ja) * 1991-08-13 1993-02-23 Matsushita Electric Ind Co Ltd 電気ポンプ
JP2005291116A (ja) * 2004-03-31 2005-10-20 Yamada Seisakusho Co Ltd ウォーターポンプ用インペラ
JP2006291938A (ja) * 2005-04-14 2006-10-26 Shin Meiwa Ind Co Ltd 遠心ポンプ用羽根車及びそれを備えた遠心ポンプ

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Publication number Priority date Publication date Assignee Title
US1470607A (en) * 1922-11-03 1923-10-16 Unchokeable Pump Ltd Impeller for centrifugal pumps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6429294U (fr) * 1987-08-13 1989-02-21
JPH0544700A (ja) * 1991-08-13 1993-02-23 Matsushita Electric Ind Co Ltd 電気ポンプ
JP2005291116A (ja) * 2004-03-31 2005-10-20 Yamada Seisakusho Co Ltd ウォーターポンプ用インペラ
JP2006291938A (ja) * 2005-04-14 2006-10-26 Shin Meiwa Ind Co Ltd 遠心ポンプ用羽根車及びそれを備えた遠心ポンプ

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CA2729815A1 (fr) 2010-01-07
JP2010014047A (ja) 2010-01-21
US20110182734A1 (en) 2011-07-28

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