WO2023002733A1 - ポンプケーシングおよびポンプ - Google Patents
ポンプケーシングおよびポンプ Download PDFInfo
- Publication number
- WO2023002733A1 WO2023002733A1 PCT/JP2022/018536 JP2022018536W WO2023002733A1 WO 2023002733 A1 WO2023002733 A1 WO 2023002733A1 JP 2022018536 W JP2022018536 W JP 2022018536W WO 2023002733 A1 WO2023002733 A1 WO 2023002733A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump casing
- cutter
- region
- impeller
- end side
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 23
- 238000010586 diagram Methods 0.000 description 13
- 239000000126 substance Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal 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
- 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
- F04D7/045—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 with means for comminuting, mixing stirring or otherwise treating
Definitions
- the present invention relates to pump casings and pumps.
- Pumps are used to transfer liquids such as sewage flowing through sewage pipes.
- Such wastewater may contain foreign substances such as fibrous substances and solid substances. If such foreign matter adheres to the blades of the impeller and accumulates, the foreign matter may clog the pump.
- an object of the present invention is to provide a pump casing and a pump that can prevent clogging of the pump by foreign matter.
- a pump casing capable of housing an impeller.
- the pump casing includes a cutter having an upper surface facing a leading edge of the impeller when the impeller is received in the pump casing, the upper surface having at least two angled regions. are doing.
- the region is divided into an inner end region arranged on the inner end side of the front edge and an outer end region arranged on the outer end side of the front edge, The angle between the inner end region and the leading edge is greater than the angle between the outer end region and the leading edge. In one aspect, the region is divided into an inner end region arranged on the inner end side of the front edge and an outer end region arranged on the outer end side of the front edge, The angle between the outer end region and the leading edge is greater than the angle between the inner end region and the leading edge. In one aspect, the upper surface divides the region into an inner end region arranged on the inner end side of the front edge portion and an outer end region arranged on the outer end side of the front edge portion. and a gap between the boundary portion and the front edge portion is defined by a gap between the inner end side region and the front edge portion and a gap between the outer end side region and the front edge portion. smaller than the gap between
- the boundary has a curved shape that smoothly connects the inner end region and the outer end region.
- the boundary portion has a corner shape that connects the inner end side region and the outer end side region at a predetermined angle.
- the pump casing includes a casing body that can be arranged around the impeller, and a casing liner that is connected to the casing body and to which the cutter is fixed.
- the cutter is constructed from a different member than the casing liner. In one aspect, the cutter is an integrally formed member with the casing liner. In one aspect, the cutter includes a front side surface positioned forward in a rotation direction of the impeller when the impeller is housed in the pump casing, and a and a rear side located rearward in the rotational direction of the impeller, and the front side and the rear side are connected to the top surface.
- the front side surface has a planar shape. In one aspect, the front side surface has a shape bent at a predetermined angle. In one aspect, the front side surface has a curved shape.
- the pump casing has a suction port and a discharge port, and the cutter is located on the opposite side of the discharge port with respect to the center of the suction port.
- the pump casing has a groove formed in its inner surface, the groove being positioned adjacent to the cutter.
- a pump in one aspect, includes an impeller and the pump casing that houses the impeller.
- the pump casing has a cutter facing the front edge of the impeller. Therefore, even if foreign matter contained in the liquid is sucked into the pump casing, the cutter cuts (and/or grinds) the foreign matter. As a result, the pump casing can prevent clogging of the pump by foreign matter.
- FIG. 2 illustrates an embodiment of a pumping device
- FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; It is a figure when a cutter is seen from diagonally above. It is a figure when a cutter is seen from diagonally below.
- FIG. 11 shows another embodiment of a cutter; It is a figure which shows the positional relationship of an ejection port and a cutter.
- FIG. 11 shows a top view of the cutter facing the leading edge;
- FIG. 8A is a diagram illustrating the angle between the leading edge of the wing and the top surface of the cutter.
- FIG. 8B is a diagram illustrating the angle between the leading edge of the wing and the top surface of the cutter.
- FIG. 8A is a diagram illustrating the angle between the leading edge of the wing and the top surface of the cutter.
- FIG. 8C illustrates the angle between the leading edge of the wing and the top surface of the cutter.
- FIG. 4 shows a plurality of grooves formed on the inner surface of the pump casing;
- FIG. 10 is a view showing the front side of a cutter having a planar shape;
- FIG. 11 shows the front side of the cutter bent at an angle;
- FIG. 10 is a view showing the front side of a cutter having a curved shape;
- FIG. 13A shows the angle between the top surface of the cutter and the front side of the cutter.
- FIG. 13B shows the angle between the top surface of the cutter and the front side of the cutter.
- FIG. 13C shows the angle between the top surface of the cutter and the front side of the cutter.
- FIG. 1 is a diagram showing one embodiment of a pump device.
- the pump device PA includes a pump 1 that transfers liquid and a motor 2 that drives the pump 1 .
- the pump 1 is a centrifugal pump for transferring liquids such as sewage flowing through sewers.
- the pump 1 includes a rotating shaft 3 connected to a motor 2, an impeller 4 fixed to the end of the rotating shaft 3, and a pump casing 5 that houses the impeller 4.
- the rotating shaft 3 is rotated by the motor 2 , and the impeller 4 rotates together with the rotating shaft 3 within the pump casing 5 .
- a mechanical seal 6 mounted on the rotating shaft 3 is arranged between the motor 2 and the impeller 4 . The mechanical seal 6 prevents liquid sucked into the pump 1 from entering the motor 2 .
- the pump casing 5 includes a casing body 10 arranged around the impeller 4 and a casing liner 11 connected to the casing body 10 .
- Casing liner 11 has a suction port 12 formed in its central portion.
- the casing main body 10 has a volute chamber (vortex chamber) 13 formed therein and a discharge port 14 connected to the volute chamber 13 .
- the volute chamber 13 has a shape surrounding the impeller 4 .
- the impeller 4 is fixed to the end of the rotating shaft 3 with fasteners 7 .
- the impeller 4 is rotated by driving the motor 2 , the liquid is sucked through the suction port 12 .
- Velocity energy is imparted to the liquid by the rotation of the impeller 4, and the liquid passes through the volute chamber 13, converting the velocity energy into pressure energy and increasing the pressure of the liquid.
- the pressurized liquid is discharged from the discharge port 14 .
- the blades 15 of the impeller 4 face the inner surface 11a of the casing liner 11, and a gap having a predetermined size is formed between the blades 15 and the inner surface 11a.
- FIG. 2 is a cross-sectional view taken along line AA of FIG.
- the impeller 4 includes a plurality of (two in this embodiment) blades 15 and a boss portion 16 to which the blades 15 are fixed.
- the blade 15 rotates around the boss portion 16 together with the rotating shaft 3 (see the solid line arrow in FIG. 2).
- the pump casing 5 has a tongue portion 25 forming the winding start of the volute chamber 13.
- the volute chamber 13 extends along the circumferential direction of the impeller 4 , and the liquid flowing through the volute chamber 13 is divided by the tongue portion 25 . Therefore, most of the liquid flows to the discharge port 14, while part of the liquid circulates through the volute chamber 13 (see dotted arrow in FIG. 2).
- the wing 15 is a swept wing. More specifically, wing 15 has a leading edge 20 spirally extending from boss 16 and a trailing edge 21 spiraling from leading edge 20 . The front edge 20 and the rear edge 21 are connected to each other and are integrally constructed.
- the front edge 20 is arranged radially inside the suction port 12 .
- the trailing edge 21 faces the inner surface 11a of the casing liner 11 (see FIG. 1). Therefore, when the casing liner 11 is viewed from the direction of the axis CL of the rotating shaft 3, the front edge portion 20 is arranged to be exposed from the casing liner 11, and the rear edge portion 21 is arranged on the back side of the casing liner 11. .
- the liquid handled by the pump device PA may contain foreign substances such as fibrous substances and solid substances.
- a leading edge 20 of the airfoil 15 is arranged radially inward of the inlet 12 . Therefore, when the handling liquid is sucked into the suction port 12 by the rotation of the impeller 4, there is a risk that the foreign matter will adhere to the front edge portion 20 and accumulate thereon. If the impeller 4 rotates in this state, foreign matter may be caught in the gap between the trailing edge portion 21 and the inner surface 11a of the casing liner 11, resulting in blockage of the pump 1.
- the pump 1 (more specifically, the pump casing 5) is provided with a cutter 30 that cuts (and/or grinds) the foreign matter.
- the configuration of the cutter 30 will be described below with reference to the drawings.
- Fig. 3 is a view of the cutter when viewed obliquely from above.
- FIG. 4 is a diagram when the cutter is viewed obliquely from below.
- shape of cutter 30 is not particularly limited, in the embodiment shown in FIGS. 3 and 4, cutter 30 has a tapered shape when viewed from the direction of axis CL.
- the cutter 30 is fixed to the casing liner 11 of the pump casing 5 and protrudes from the suction port 12 so as to obstruct the flow path of liquid passing through the suction port 12 .
- Cutter 30 has a length that covers leading edge 20 .
- the casing liner 11 has a cutter mounting portion 31 connected to the suction port 12.
- the cutter mounting portion 31 is a concave portion extending radially outward of the suction port 12
- the cutter 30 is fixed to the cutter mounting portion 31 with two fasteners 32 .
- the number of fasteners 32 is not limited to this embodiment.
- the cutter 30 is composed of a member different from the casing liner 11. With such a configuration, the operator can easily replace the cutter 30 even if the cutter 30 is worn. Furthermore, by placing a spacer (not shown) between cutter 30 and casing liner 11 , the operator can adjust the size of the gap between cutter 30 and leading edge 20 .
- cutter 30 may be an integrally formed member with casing liner 11 .
- the cutter 30 When the impeller 4 is accommodated in the pump casing 5, the cutter 30 has an upper surface 35 facing the front edge portion 20 of the blade 15 and a front portion located forward in the rotational direction of the impeller 4 (see the arrow in FIG. 4). It has a side surface 36 , a rear side surface 37 positioned rearward in the rotational direction of the impeller 4 , and a lower surface 38 positioned on the opposite side of the upper surface 35 .
- the front side 36 and the rear side 37 are connected to the upper surface 35 and the lower surface 38, and the longitudinal cross-sectional shape of the cutter 30 has a square shape.
- FIG. 5 is a diagram showing another embodiment of the cutter.
- the cutter 30 does not have a lower surface 38 and the longitudinal cross-sectional shape of the cutter 30 has a triangular shape.
- the longitudinal cross-sectional shape of cutter 30 may have a square shape or may have a triangular shape.
- the cutter 30 has a different structure. Liquid containing foreign matter is vigorously sucked into the pump casing 5 . Therefore, the cutter 30 can cut the captured foreign matter regardless of its vertical cross-sectional shape (see FIGS. 4 and 5).
- FIG. 6 is a diagram showing the positional relationship between the ejection port and the cutter.
- the cutter 30 is arranged on the opposite side of the discharge port 14 with respect to the center CP of the suction port 12 .
- the center CP of the suction port 12 coincides with the direction of the axis CL.
- the tongue 25 is arranged adjacent to the outlet 14 . With such an arrangement, foreign matter is released into the volute chamber 13 at a location opposite the tongue 25 . After that, the foreign matter is moved in the volute chamber 13 by the flowing liquid while receiving centrifugal force. Therefore, the foreign matter is discharged outside from the ejection port 14 without being caught by the tongue portion 25 . As a result, foreign matter is prevented from being caught on the tongue portion 25 .
- FIG. 7 is a diagram showing the upper surface of the cutter facing the leading edge.
- the upper surface 35 of the cutter 30 has regions with at least two angles (tilt angles).
- the upper surface 35 of the cutter 30 includes an inner end region 35A arranged on the inner end side of the front edge portion 20, an outer end region 35B arranged on the outer end side of the front edge portion 20, and a boundary portion 35C arranged between the inner end side region 35A and the outer end side region 35B. Since the inner end side region 35A is arranged on the distal end side of the cutter 30, it may be called a distal end side region. Similarly, outer region 35B may be referred to as a proximal region because it is located proximal to cutter 30 .
- the black dots indicating the boundary portion 35C are imaginary points for clearly indicating the position of the boundary portion 35C.
- the inner end of the leading edge 20 is defined as the portion of the leading edge 20 adjacent the boss 16 and the outer end of the leading edge 20 is defined as the portion of the leading edge 20 adjacent the trailing edge 21 .
- the area formed on the upper surface 35 of the cutter 30 is partitioned into an inner end side area 35A and an outer end side area 35B by a boundary portion 35C.
- the outer end region 35B is inclined downward from the base end side of the cutter 30 toward the distal end side
- the inner end region 35A is inclined downward from the outer end side region 35B toward the distal end side of the cutter 30. are doing.
- Figures 8A to 8C are diagrams illustrating the angle between the leading edge of the wing and the upper surface of the cutter. 8A to 8C, the angles are exaggerated for clarity.
- the boss portion 16 extends parallel to the horizontal line HL, and the front edge portion 20 is inclined upward with respect to the horizontal line HL. extended.
- the front edge portion 20 has a tapered shape extending obliquely upward from the boss portion 16 .
- the angle ⁇ 1 between the inner end region 35A and the front edge portion 20 is larger than the angle ⁇ 2 between the outer end region 35B and the front edge portion 20 ( ⁇ 1> ⁇ 2). Since the angle ⁇ 1 is larger than the angle ⁇ 2, foreign matter contained in the liquid actively enters the gap between the inner end side region 35A of the upper surface 35 and the front edge portion 20. As shown in FIG. Foreign matter that has entered the gap moves from the inner end region 35A to the outer end region 35B as the front edge portion 20 rotates.
- the gap between the boundary portion 35C and the front edge portion 20 is the gap between the inner end side region 35A and the front edge portion 20 and the gap between the outer end side region 35B and the front edge portion 20. smaller than the gap between them.
- the boundary portion 35C is closest to the leading edge portion 20 on the upper surface 35 of the cutter 30 . Therefore, foreign matter moving from the inner end region 35A to the outer end region 35B is crushed by the front edge portion 20 and the boundary portion 35C and cut into finer pieces.
- the boundary portion 35C may have a curved shape that smoothly connects the inner end side region 35A and the outer end side region 35B, and the inner end side region 35A and the outer end side region 35B are formed at a predetermined angle (more specifically, may have a corner shape that connects at an obtuse angle).
- the shape of the boundary portion 35C may be determined based on factors such as the material, size, and length of the foreign matter contained in the liquid.
- each of the inner end side region 35A and the outer end side region 35B has a planar shape.
- at least one of the inner end region 35A and the outer end region 35B may have a curved surface shape (that is, a convex shape) extending in an arcuate direction toward the front edge 20 .
- at least one of the inner end side region 35A and the outer end side region 35B may have a curved surface shape (that is, a concave shape) extending in an arc in a direction away from the front edge portion 20.
- the inner end region 35A and the outer end region 35B may have curved surface shapes with the same curvature, or may have curved surface shapes with different curvatures.
- the boundary portion 35C is arranged adjacent to the central portion of the front edge portion 20 (see FIG. 7). In one embodiment, the boundary 35C may be located closer to the inner end than the central portion of the leading edge 20; It may be arranged closer to the outer end side than.
- the angle ⁇ 2 is smaller than the angle ⁇ 1. Therefore, foreign matter passing through the boundary portion 35C is positively ground by the outer end side region 35B and the front edge portion 20. As shown in FIG. The ground foreign matter is discharged into the volute chamber 13 together with the liquid.
- the pump casing 5 may have grooves 40 formed on its inner surface (see FIG. 3).
- the groove 40 is arranged upstream of the cutter 30 in the rotational direction of the impeller 4 and is adjacent to the cutter 30 . More specifically, groove 40 is formed in inner surface 11 a of casing liner 11 and extends from suction port 12 toward volute chamber 13 .
- the forward side 36 of the cutter 30 is connected to the beginning 40a of the groove 40 and the end 40b of the groove 40 is connected to the volute chamber 13. As shown in FIG.
- FIG. 9 is a diagram showing a plurality of grooves formed on the inner surface of the pump casing.
- the pump casing 5 may have a plurality of grooves 40 formed on its inner surface.
- the plurality of grooves 40 are arranged along the circumferential direction of the inlet 12 and the cutter 30 is arranged adjacent to one of the plurality of grooves 40 .
- the cutter 30 shown in FIG. 9 has the same structure as the cutter 30 according to the embodiment shown in FIG. 5, but may have the same structure as the cutter 30 according to the embodiment shown in FIG.
- the angle ⁇ 1 is larger than the angle ⁇ 2, but as shown in FIG. 8C, the angle ⁇ 1 may be smaller than the angle ⁇ 2 ( ⁇ 1 ⁇ 2).
- the angle ⁇ 2 between the outer end region 35B and the front edge portion 20 is greater than the angle ⁇ 1 between the inner end region 35A and the front edge portion 20.
- the leading edge portion 20 can positively move the ground foreign matter to the trailing edge portion 21 side. If the pump casing 5 has grooves 40 , the front edge 20 can actively push foreign objects into the grooves 40 . The foreign matter that has entered the groove 40 moves along the groove 40 and is discharged into the volute chamber 13 at the terminal end 40 b of the groove 40 . Foreign matter received by the front side surface 36 of the cutter 30 is guided to the groove 40 through the front side surface 36 and discharged from the groove 40 into the volute chamber 13 by the rotation of the impeller 4 .
- FIG. 10 is a diagram showing the front side of a cutter having a planar shape.
- FIG. 11 is a diagram showing the front side of the cutter bent at a predetermined angle.
- FIG. 12 is a diagram showing the front side of a cutter having a curved shape.
- the front side surface 36 of the cutter 30 has a planar shape parallel to the reference line RL extending perpendicular to the direction of the axis CL.
- the front side surface 36 extending parallel to the reference line RL has a shape that is bent halfway in the direction of rotation of the impeller 4 (see the arrow in FIG. 11).
- the front side surface 36 has a curved shape extending in an arc shape in the direction of rotation of the impeller 4 (see arrow in FIG. 12).
- the operator may select the shape of the front side surface 36 of the cutter 30 based on factors such as the material, size and length of foreign matter contained in the liquid.
- the operator can appropriately change the cutter 30 having a different front side surface 36 according to the installation situation of the pump device PA. can be done.
- 13A to 13C are diagrams showing the angle between the top surface of the cutter and the front side surface of the cutter.
- the angle ⁇ a between the top surface 35 and the front side surface 36 may be an acute angle, as shown in FIGS. 13A and 13C, or the angle ⁇ a may be a right angle (90 degrees), as shown in FIG. 13B. good too. If the angle ⁇ a is acute, the angle ⁇ a may be between 45 degrees and 58 degrees. Although not shown, the angle ⁇ a may be an obtuse angle as long as the above effects can be achieved.
- the cutter 30 does not have a lower surface 38, and the vertical cross-sectional shape of the cutter 30 has a triangular shape.
- the longitudinal cross-sectional shape of cutter 30 may have a square shape or may have a triangular shape.
- the upper surface 35 of cutter 30 having two regions (ie, the inner end region 35A and the outer end region 35B), the upper surface 35 of cutter 30 is limited to two regions. not. In one embodiment, the upper surface 35 of cutter 30 may have regions with three or more angles (tilt angles).
- the present invention can be used for pump casings and pumps.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
一態様では、前記領域は、前記前縁部の内端側に配置された内端側領域と、前記前縁部の外端側に配置された外端側領域と、に区画されており、前記外端側領域と前記前縁部との間の角度は、前記内端側領域と前記前縁部との間の角度よりも大きい。
一態様では、前記上面は、前記領域を、前記前縁部の内端側に配置された内端側領域と、前記前縁部の外端側に配置された外端側領域と、に区画する境界部を有しており、前記境界部と前記前縁部との間の隙間は、前記内端側領域と前記前縁部との間の隙間および前記外端側領域と前記前縁部との間の隙間よりも小さい。
一態様では、前記境界部は、前記内端側領域および前記外端側領域を所定の角度で接続する角部形状を有している。
一態様では、前記ポンプケーシングは、前記羽根車の周囲に配置可能なケーシング本体と、前記ケーシング本体に接続され、かつ前記カッターが固定されたケーシングライナと、を備えている。
一態様では、前記カッターは、前記ケーシングライナと一体成形部材である。
一態様では、前記カッターは、前記羽根車が前記ポンプケーシングに収容されたときにおける前記羽根車の回転方向において、前方に位置する前方側面と、前記羽根車が前記ポンプケーシングに収容されたときにおける前記羽根車の回転方向において、後方に位置する後方側面と、を有しており、前記前方側面および前記後方側面は、前記上面に接続されている。
一態様では、前記前方側面は、所定の角度で折れ曲がった形状を有している。
一態様では、前記前方側面は、曲面形状を有している。
一態様では、前記ポンプケーシングは、その内面に形成された溝を有しており、前記溝は、前記カッターに隣接して配置されている。
図1は、ポンプ装置の一実施形態を示す図である。図1に示すように、ポンプ装置PAは、液体を移送するポンプ1と、ポンプ1を駆動するモータ2と、を備えている。図1に示す実施形態では、ポンプ1は、下水管を流れる汚水などの液体を移送するための渦巻ポンプである。
2 モータ
3 回転軸
4 羽根車
5 ポンプケーシング
6 メカニカルシール
7 締結具
10 ケーシング本体
11 ケーシングライナ
11a 内面
12 吸込口
13 ボリュート室
14 吐出口
15 翼
16 ボス部
20 前縁部
21 後縁部
25 舌部
30 カッター
31 カッター装着部
32 締結具
35 上面
35A 内端側領域(先端側領域)
35B 外端側領域(基端側領域)
35C 境界部
36 前方側面
37 後方側面
38 下面
40 溝
40a 始端
40b 終端
Claims (16)
- 羽根車を収容可能なポンプケーシングであって、
前記ポンプケーシングは、前記羽根車が前記ポンプケーシングに収容されたとき、前記羽根車の前縁部と対向する上面を有するカッターを備えており、
前記上面は、少なくとも2つの角度を有する領域を有している、ポンプケーシング。 - 前記領域は、
前記前縁部の内端側に配置された内端側領域と、
前記前縁部の外端側に配置された外端側領域と、に区画されており、
前記内端側領域と前記前縁部との間の角度は、前記外端側領域と前記前縁部との間の角度よりも大きい、請求項1に記載のポンプケーシング。 - 前記領域は、
前記前縁部の内端側に配置された内端側領域と、
前記前縁部の外端側に配置された外端側領域と、に区画されており、
前記外端側領域と前記前縁部との間の角度は、前記内端側領域と前記前縁部との間の角度よりも大きい、請求項1に記載のポンプケーシング。 - 前記上面は、前記領域を、前記前縁部の内端側に配置された内端側領域と、前記前縁部の外端側に配置された外端側領域と、に区画する境界部を有しており、
前記境界部と前記前縁部との間の隙間は、前記内端側領域と前記前縁部との間の隙間および前記外端側領域と前記前縁部との間の隙間よりも小さい、請求項1~請求項3のいずれか一項に記載のポンプケーシング。 - 前記境界部は、前記内端側領域および前記外端側領域を滑らかに接続する曲部形状を有している、請求項4に記載のポンプケーシング。
- 前記境界部は、前記内端側領域および前記外端側領域を所定の角度で接続する角部形状を有している、請求項4に記載のポンプケーシング。
- 前記ポンプケーシングは、
前記羽根車の周囲に配置可能なケーシング本体と、
前記ケーシング本体に接続され、かつ前記カッターが固定されたケーシングライナと、を備えている、請求項1~請求項6のいずれか一項に記載のポンプケーシング。 - 前記カッターは、前記ケーシングライナとは異なる部材から構成されている、請求項7に記載のポンプケーシング。
- 前記カッターは、前記ケーシングライナと一体成形部材である、請求項7に記載のポンプケーシング。
- 前記カッターは、
前記羽根車が前記ポンプケーシングに収容されたときにおける前記羽根車の回転方向において、前方に位置する前方側面と、
前記羽根車が前記ポンプケーシングに収容されたときにおける前記羽根車の回転方向において、後方に位置する後方側面と、を有しており、
前記前方側面および前記後方側面は、前記上面に接続されている、請求項1~請求項9のいずれか一項に記載のポンプケーシング。 - 前記前方側面は、平面形状を有している、請求項10に記載のポンプケーシング。
- 前記前方側面は、所定の角度で折れ曲がった形状を有している、請求項10に記載のポンプケーシング。
- 前記前方側面は、曲面形状を有している、請求項10に記載のポンプケーシング。
- 前記ポンプケーシングは、吸込口および吐出口を有しており、
前記カッターは、前記吸込口の中心に関して、前記吐出口の反対側に配置されている、請求項1~請求項13のいずれか一項に記載のポンプケーシング。 - 前記ポンプケーシングは、その内面に形成された溝を有しており、
前記溝は、前記カッターに隣接して配置されている、請求項1~請求項14のいずれか一項に記載のポンプケーシング。 - 羽根車と、
前記羽根車を収容する請求項1~請求項15のいずれか一項に記載のポンプケーシングと、を備える、ポンプ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3226718A CA3226718A1 (en) | 2021-07-21 | 2022-04-22 | Pump casing and pump |
CN202280050401.0A CN117751245A (zh) | 2021-07-21 | 2022-04-22 | 泵壳体及泵 |
EP22845672.9A EP4375511A1 (en) | 2021-07-21 | 2022-04-22 | Pump casing and pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021120566A JP2023016327A (ja) | 2021-07-21 | 2021-07-21 | ポンプケーシングおよびポンプ |
JP2021-120566 | 2021-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023002733A1 true WO2023002733A1 (ja) | 2023-01-26 |
Family
ID=84979105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/018536 WO2023002733A1 (ja) | 2021-07-21 | 2022-04-22 | ポンプケーシングおよびポンプ |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4375511A1 (ja) |
JP (1) | JP2023016327A (ja) |
CN (1) | CN117751245A (ja) |
CA (1) | CA3226718A1 (ja) |
WO (1) | WO2023002733A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495009U (ja) * | 1972-04-12 | 1974-01-17 | ||
JPS5241904A (en) * | 1975-09-29 | 1977-03-31 | Fujikawa Kikai Kk | Cutting mechanism for dirty water pump |
JPS5357507A (en) * | 1976-11-04 | 1978-05-24 | Kubota Ltd | Cutter underwater pumps |
JPS54176101U (ja) * | 1978-06-02 | 1979-12-12 | ||
JPS5641488A (en) * | 1979-09-11 | 1981-04-18 | Sogo Pump Seisakusho:Kk | Pump for impurities |
JP2019143630A (ja) | 2018-02-22 | 2019-08-29 | カー エス ベー エス.アー.エス. | フィンガーポンプ |
-
2021
- 2021-07-21 JP JP2021120566A patent/JP2023016327A/ja active Pending
-
2022
- 2022-04-22 CN CN202280050401.0A patent/CN117751245A/zh active Pending
- 2022-04-22 EP EP22845672.9A patent/EP4375511A1/en active Pending
- 2022-04-22 CA CA3226718A patent/CA3226718A1/en active Pending
- 2022-04-22 WO PCT/JP2022/018536 patent/WO2023002733A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495009U (ja) * | 1972-04-12 | 1974-01-17 | ||
JPS5241904A (en) * | 1975-09-29 | 1977-03-31 | Fujikawa Kikai Kk | Cutting mechanism for dirty water pump |
JPS5357507A (en) * | 1976-11-04 | 1978-05-24 | Kubota Ltd | Cutter underwater pumps |
JPS54176101U (ja) * | 1978-06-02 | 1979-12-12 | ||
JPS5641488A (en) * | 1979-09-11 | 1981-04-18 | Sogo Pump Seisakusho:Kk | Pump for impurities |
JP2019143630A (ja) | 2018-02-22 | 2019-08-29 | カー エス ベー エス.アー.エス. | フィンガーポンプ |
Also Published As
Publication number | Publication date |
---|---|
JP2023016327A (ja) | 2023-02-02 |
EP4375511A1 (en) | 2024-05-29 |
CN117751245A (zh) | 2024-03-22 |
CA3226718A1 (en) | 2023-01-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1284368B1 (en) | Diverter for reducing wear in a slurry pump | |
US6953321B2 (en) | Centrifugal pump with configured volute | |
CN107407284B (zh) | 蜗壳泵 | |
CN109257934B (zh) | 用于泥浆泵的旋转部件 | |
WO1991005168A1 (en) | Pump impeller | |
EA031306B1 (ru) | Крыльчатка шламового насоса | |
EP3899285B1 (en) | Centrifugal pump with scraper | |
JP4143184B2 (ja) | 下水を輸送するためのポンプに使用される遠心型または半軸流型のポンプ羽根車 | |
US20040136825A1 (en) | Multiple diverter for reducing wear in a slurry pump | |
EP3276178B1 (en) | Volute pump | |
CA2819779C (en) | Centrifugal pump and a double bent rotor blade for use in such a centrifugal pump | |
WO2023002733A1 (ja) | ポンプケーシングおよびポンプ | |
US20090232639A1 (en) | Wear plate for a centrifugal pump | |
KR102345832B1 (ko) | 이물질의 걸림을 최소화한 하이브리드형 임펠러 및 이를 구비한 수중·원심펌프 | |
JP5300508B2 (ja) | ポンプの羽根車およびポンプ | |
JPH0730751B2 (ja) | ポンプ | |
KR102132233B1 (ko) | 고비중 미세슬러리용 원심펌프의 오픈형 임펠러 | |
JP6896595B2 (ja) | 汚水用ポンプ | |
JP2023057710A (ja) | 羽根車およびポンプ | |
KR102431914B1 (ko) | 임펠러 및 이를 포함하는 펌프 | |
KR101404578B1 (ko) | 원심펌프용 임펠러 | |
EP4397866A2 (en) | Impeller for a centrifugal pump | |
CN113039365A (zh) | 涡流泵 | |
JP2023161750A (ja) | ポンプ | |
CN112673177A (zh) | 用于离心泵的倒环形侧隙装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22845672 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 3226718 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280050401.0 Country of ref document: CN |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112024000908 Country of ref document: BR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022845672 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022845672 Country of ref document: EP Effective date: 20240221 |
|
ENP | Entry into the national phase |
Ref document number: 112024000908 Country of ref document: BR Kind code of ref document: A2 Effective date: 20240116 |