JP2000073980A - Self-priming pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-priming pump no allowing liquid flowing inside a discharge opening to be in a vortex flow. SOLUTION: This self-priming pump 1 is composed of a tank room 18 equipped with a suction room 20 provided with a suction opening for sucking liquid and a discharge room 26 provided with a discharge opening 26 for discharging the liquid, a pump unit 6 equipped with a pump room 19 for accommodating an impeller 10 in a rotatable manner, and a drive motor 9 for rotating the impeller 10. by rotating the impeller 10, pumping operation is conducted through a self-priming process of gradually discharging air as mixing up air and the liquid inside the pump 6. A straightening plate 31 for discharging the liquid conveyed in a voltex flow through the discharge opening 26 after straightening the flow in a linear flow is formed near the discharge opening 26 of the discharge room 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-priming pump which performs a pumping operation through a self-priming process of circulating a liquid while stirring priming water and air.

[0002]

2. Description of the Related Art Conventionally, a liquid such as water or hot water is pumped to pass a liquid through a heat exchanger for heating liquid from a liquid source such as a bath or a purification filter for purifying the liquid. A self-priming pump as shown in FIGS. 9 and 10 has been proposed as a device for returning the liquid pumped up to the liquid source (see Japanese Patent Application Laid-Open No. 3-43695). As shown in FIG. 9, the self-priming pump includes a drive motor (not shown) stored in a motor case 111,
It comprises a pump section 112 for pumping the liquid from the liquid source by the driving force of the driving motor.

The pump section 112 has a first case 114 forming a tank chamber 113 and a second case 117 forming a pump chamber 116 for rotatably storing an impeller 115.
And a partition plate 118 for partitioning the tank chamber 113 and the pump chamber 116. The motor case 111 and the second case 117 are fixed with the main plate 119 interposed therebetween.

[0004] The tank chamber 1 formed by the first case 114
The partition 13 is divided by a partition 120 into a suction chamber 121 for sucking the liquid and a discharge chamber 122 for discharging the liquid. The suction chamber 121 is provided with a suction port 123 for sucking the liquid into the tank chamber 113. The discharge chamber 122 is provided with a discharge port (not shown) for discharging the liquid sucked into the tank chamber 113.

As shown in FIG. 10, the pump chamber 116 formed by the second case 117 is divided into an impeller chamber 125 and a fluid passage 126 communicating with the impeller chamber 125 by a separation wall 124. ing. In the impeller chamber 125, a fixed shaft 127 having one end fixed to the main plate 119 is provided upright. An impeller 128 is rotatably supported on the fixed shaft 127.

On the other hand, the partition plate 118 has an inlet 129.
, An outlet 130, and a return hole 131 are formed, and the pump chamber 116 and the tank chamber 113 are respectively inserted therethrough. With these configurations, the suction chamber 12
1 through the inlet 129 and the impeller chamber 125
And is led out from the impeller chamber 125 to the discharge chamber 122 through the outlet 130 via the fluid passage 126. The liquid led to the discharge chamber 122 is returned to the impeller chamber 125 through the return hole 131.

On the other hand, the impeller 128 has a cylindrical rotating cylinder 132 and a disk-shaped substrate 133 into which the rotating cylinder 132 is inserted and fixed. The rotating cylinder 132 is inserted into a fixed shaft 127. It is supported rotatably. The impeller 128 is disposed in the impeller chamber 125 so as to face a drive magnet 135 fixed to a motor rotation shaft 134 disposed in the motor case 112 with a main plate 119 interposed therebetween. The impeller 128 is configured to rotate following the rotation of the drive magnet 135 due to the magnetic attraction of the internal driven magnet.

A plurality of partitions 136 are provided upright on the surface of the substrate 133 facing the suction chamber 121. An end face of the plurality of partition walls 136 has a liquid inlet 1 on the inner peripheral side.
A disk-shaped member 138 having an outer diameter of substantially the same as that of the substrate 133 is fixed. That is, the substrate 133 and the disk-shaped member 138 are connected by the plurality of partition walls 136, and the space between the substrate 133 and the disk-shaped member 138 is an internal space of the impeller 128. Also,
The internal space of the impeller 128 is partitioned by a plurality of partition walls 136 to form a plurality of flow paths 139. The plurality of flow paths 139 have a radially inner peripheral side communicating with the inlet 137 and a radially outer peripheral side having an outlet 140 opened to the outside of the impeller 128.

The self-priming pump constructed as described above starts the self-priming process when the impeller 128 is rotated with the priming water stored in the pump section 112. That is, when the impeller 128 is rotated, the tank chamber 113 is rotated.
The priming water and the air therein are sucked into the impeller chamber 125 and are stirred and mixed by the impeller 128 in the impeller chamber 125. The priming water and the air thus mixed are sent from the impeller chamber 125 to the tank chamber 113 via the fluid passage 126, where they are separated into the priming water and the air. At this time, the air is discharged from the discharge chamber 1 of the tank chamber 113.
The priming water is discharged from a discharge port provided in 22, and returns to the impeller chamber 125 from the return hole 131 of the partition plate 118. By repeating such an operation, the air in the pump unit 112 is gradually discharged to the outside. And
With the decrease of the air, the liquid of the liquid source is pumped by the pump unit 11.
2 infiltrates.

Then, the self-priming process is completed, and the pump 11
When the liquid is filled in 2, a pumping operation of pumping the liquid from the liquid source into a heat exchanger or the like is started. When the pumping operation is started, the flow rate detector is activated by the flow of the liquid discharged from the pump unit 112, and the microcomputer or the like recognizes that the pumping operation has started.

[0011]

However, in the above-described self-priming pump, the priming water and the air are vigorously stirred by the impeller 128 to form a vortex water flow, so that the priming water and the air are efficiently conveyed to the tank chamber 113 side. It is configured to send to For this reason, the air in the self-priming process and the liquid during the subsequent pumping operation are discharged from the discharge port of the tank chamber 113 while forming a spiral flow. As a result, there is a problem that the flow rate detector disposed in the pipe continuous to the discharge port cannot accurately detect the flow rate of the liquid passing through the pipe.

It is an object of the present invention to address the above-mentioned problems,
An object of the present invention is to provide a self-priming pump in which a liquid flowing in a discharge port is prevented from forming a spiral flow.

[0013]

In order to achieve the above object, according to the present invention, a suction chamber provided with a suction port for sucking a liquid and a discharge port for discharging the sucked liquid are provided. A pump chamber including a tank chamber composed of a discharge chamber, a pump chamber for rotatably storing an impeller for sending the liquid sucked from the suction chamber to the discharge chamber side, and a drive motor for rotating the impeller. By rotating the impeller while a predetermined amount of priming water is stored in the internal space of the pump section, through a self-priming process of circulating between the tank chamber and the pump chamber while stirring the priming water and air. In a self-priming pump that performs a water pumping operation, a rectifying plate for regulating the flow of liquid is provided near a discharge port of a discharge chamber.
Therefore, the vortex water flowing in the tank chamber during the pumping operation is adjusted in the discharge chamber and discharged from the discharge port to the outside.

According to a second aspect of the present invention, in the self-priming pump according to the first aspect, the rectifying plate is provided between the discharge port for sending the liquid from the pump chamber to the discharge chamber and the discharge port. ing. Therefore, at the time of pumping operation, the vortex water-like liquid spouted vigorously from the outlet to the discharge chamber is prevented from moving to the discharge port side by the flow regulating plate, and from the discharge port after the flow is adjusted in the discharge chamber. It is discharged outside.

[0015] Further, the invention according to claim 3 is based on claim 2.
In the self-priming pump described above, the rectifying plate is formed on the surface of the discharge chamber wall facing the outlet so as to extend toward the outlet. Therefore, during the pumping operation, the vortex water-like liquid that has been vigorously discharged from the outlet to the discharge chamber collides with the rectifying plate and is guided to the inside of the discharge chamber. Is discharged to

[0016] The invention according to claim 4 is based on claim 1,
In the self-priming pump described in 2 or 3, a flow rate detector for detecting the flow rate of the liquid is provided outside the discharge port. Therefore, it is possible to detect that the self-priming pump has completed the self-priming process and has shifted to the pumping operation by detecting a change in the discharge amount of the liquid.

Further, the invention according to claim 5 provides the invention according to claim 4.
In the self-priming pump described above, the flow rate detector is constituted by a flow switch including an operating portion that is activated when a predetermined amount or more of the liquid collides. Therefore, with a simpler configuration, it is possible to detect that the self-priming pump has completed the self-priming process and has shifted to the pumping operation.

According to a sixth aspect of the present invention, there is provided the self-priming pump according to the fifth aspect, wherein
The end of the self-priming process is detected. Therefore, control of other devices connected to the self-priming pump, for example, control of ON / OFF of the heat exchanger, etc. can be performed based on ON / OFF of the flow switch.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a self-priming pump according to the present invention will be described with reference to FIGS. In addition, this self-priming pump is a self-priming process in which the impeller is rotated while a predetermined amount of priming water is stored in an internal space, whereby priming water and air are circulated while being stirred to gradually discharge air to the outside. After that, the operation shifts to a pumping operation of sucking up the liquid from the liquid source.

As shown in FIG. 1, the self-priming pump 1 has a pump section 6 formed by fixing a first case 2 and a second case 3 with a partition plate 4 and a rubber pad 5 therebetween. A drive motor 9 having a motor case 8 fixed to the second case 3 via a base plate 7;
And an impeller 10 that is arranged inside and is rotated by the driving force of the driving motor 9.

The self-priming pump 1 is connected to a liquid source (not shown) storing liquid and a heat exchanger (not shown) for warming the liquid. The self-priming pump 1 is a self-priming electric pump for sucking the liquid of the liquid source into the pump unit 6 by the rotational force of the impeller 10 and supplying the liquid from the pump unit 6 to the heat exchanger. I have.

The pump section 6 is formed of one case body formed by joining and fixing two case halves of a first case 2 and a second case 3 together. That is, as shown in FIG. 2, the first case 2 is fixed to the second case 3 at the six fixing portions 11a to 11f using screws or the like. Further, a motor fixing portion 12 for fixing the drive motor 9 is formed on a surface of the second case 3 on a side not facing the first case 2. Further, the second case 3 is provided with a fixing portion 3a for screwing and fixing the self-priming pump 1 to another device.

As shown in FIG. 1, the motor fixing portion 12 has a circular wall 13 for completely isolating the inside of the pump portion 6 and the drive motor 9 side, and a drive motor from an outer peripheral portion of the wall 13. The side wall 14 is formed to protrude toward the side 9. Note that the wall 13 is sandwiched between the side wall 14 and the pump section 6 side together with the rubber seal 13a so as to prevent the liquid in the pump section 6 from leaking to the drive motor 9 side. A screw 13b for screwing and fixing one end of a fixed shaft 15, which will be described later, is provided at a central portion of the wall 13.
A screw hole 13c is formed for inserting a through hole.

On the other hand, the base plate 7 fixed to the motor case 8 with screws 8a is fitted and fixed to the end face of the side wall 14. With this configuration, the drive motor 9 is fixed to the second case 3 while being completely isolated from the internal space of the pump section 6. The space defined by the inside of the side wall 14, the wall 13 and the base plate 7 serves as a magnet storage section 17 for rotatably storing the drive magnet 16 of the drive motor 9.

Further, between the first case 2 and the second case 3, a metal flat partition plate 4 for partitioning the internal space of the pump section 6 into a tank chamber 18 and a pump chamber 19, A rubber pad 5 provided in close contact with the plate 4 is sandwiched (see FIG. 1). That is, the tank chamber 18
Is the first case 2, the rubber pad 5 (and the partition plate 4)
It is formed by the space divided by. The pump chamber 19 is formed by a space partitioned by the second case 3 and the partition plate 4 (and the rubber pad 5).

As shown in FIG. 3, the partition plate 4 has an inlet 4a, an outlet 4b, and return holes 4c, 4c. The inlet 4 a is for introducing the liquid and air sucked into the pump section 6 from the suction chamber 20 in the tank chamber 18 to the pump chamber 19. The outlet 4b is
The liquid and the air sucked into the pump chamber 19 and stirred by the impeller 10 are led out from the pump chamber 19 to the discharge chamber 21 in the tank chamber 18. The return holes 4c, 4c are for returning the liquid refluxed from the pump chamber 19 to the tank chamber 18 to the pump chamber 19 again in the self-priming process.
0 is provided at a position where the liquid returns to the vicinity of the outer peripheral end.

Further, the rubber pad 5 prevents the liquid in the internal space of the pump section 6 from leaking out of the pump section 6 from a portion where the first case 2 and the second case 3 meet, and the tank chamber 18. This is provided to prevent leakage of liquid between the pump chamber 19 and the pump chamber 19. This rubber pad 5
Is provided in close contact with the first case 2 side of the partition plate 4 disposed between the first case 2 and the second case 3. The rubber pad 5 is, as shown in FIG.
And a contact frame portion 5d for preventing leakage by contacting the frame.

An inlet 5a, an outlet 5b, return holes 5c, 5c, and a balance port 5e are provided at positions where the rubber pad 5 does not contact the first case 2. The inlet 5a is provided at a position overlapping the inlet 4a of the partition plate 4. The outlet 5b overlaps with the outlet 4b of the partition plate 4 and is formed by a hole larger than the outlet 4b. The return holes 5c, 5c overlap the return holes 4c, 4c of the partition plate 4, and are formed by holes larger than the return holes 4c, 4c, respectively. The balance port 5e is formed in consideration of the balance with the outlet 5b in order to form the rubber pad 5 with high accuracy.

As shown in FIG. 2, a separating plate 22 extending from the inner surface of the first case 2 toward the rubber pad 5 is provided inside the tank chamber 18 formed by the first case 2. Is provided. The end of the separation plate 22 is in close contact with the contact frame 5 d of the rubber pad 5, and the tank chamber 18 is separated from the suction chamber 20 and the discharge chamber 21 by the separation plate 22.
And are separated into

On the suction chamber 20 side of the tank chamber 18, a suction port 23 for sucking the liquid from the liquid source into the pump section 6 is provided. The suction port 23 has an opening 23 a through which the suction chamber 20 of the pump section 6 is inserted into the outside, and an opening 23 a
The pipe 2 extends from the inner peripheral end of the
4 and a cylindrical protruding portion 23b connected thereto.
By connecting one end of a pipe 24 to the suction port 23 and connecting the other end of the pipe 24 to a liquid source, the pump unit 6 is connected to the liquid source. Further, the suction chamber 20 is communicated with the pump chamber 19 through the introduction ports 4a and 5a, and sucks the liquid into the pump chamber 19.

In the suction chamber 20, a cylindrical shaft 25 is formed so as to protrude from the inner surface of the first case 2 toward the second case 3. The tip of the cylindrical shaft 25 extends into the inlets 4a and 5a. A fitting recess 25 a is provided at a tip portion of the cylindrical shaft 25. A fixed shaft 15 for rotatably supporting the impeller 10 is provided on the second case 3 side, and a step 15 a formed at one end of the fixed shaft 15 is fitted into a fitting recess 25 a of the cylindrical shaft 25. It fits. In addition, fixed shaft 1
The other end of 5 is fixed to the wall 13 by a screw 13b passing through the wall 13 serving as a partition on the drive motor 9 side.

Further, on the discharge chamber 21 side of the tank chamber 18,
A discharge port 26 for discharging the liquid to the heat exchanger side is provided. The discharge port 26 is connected to the discharge chamber 21 of the pump section 6.
An opening 26a through which the outside and the outside are inserted, and a cylindrical protruding portion 26b extending to the outside of the first case 2 from the inner peripheral end of the opening 26a. By connecting one end of a pipe 27 to the discharge port 26 and connecting the other end of the pipe 27 to a heat exchanger (not shown), the pump unit 6 is connected to the heat exchanger. Further, the discharge chamber 26 is connected to the pump chamber 19 by the return holes 4c and 5c, so that the liquid can be returned to the pump chamber 19.

A flow switch 28 as a flow rate detector for detecting the flow rate of the liquid discharged from the discharge port 26 is provided outside the discharge port 26, that is, in the middle of the pipe 27. This flow switch 28
Is an operating unit 29 that operates when a predetermined amount or more of the liquid collides, and a control unit 3 that monitors the operation of the operating unit 29.
It mainly consists of 0. The flow switch 28 is configured to transmit the time of operation of the operation unit 29 to an external control device (not shown) as the end of the self-priming process of the self-priming pump 1. Thus, for example, an external control device can perform on / off control of the heat exchanger and the like. Note that control may be performed such that a point in time when a predetermined time has elapsed from the time of operation of the operation unit 29 is an end point of the self-priming process.

In the vicinity of the discharge port 26 in the discharge chamber 21,
As shown in FIGS. 2 and 5, between the outlets 4b, 5b and the discharge port 26, the outlets 4b, 5b are arranged from the pump chamber 19 side.
A flow straightening plate 31 for regulating the flow of the liquid led out through is formed. The current plate 31 is provided in the discharge chamber 2
1 are formed on the side of the inner wall 1 facing the outlets 4b, 5b formed on the partition plate 4 and the rubber pad 5, respectively.
The outlet 4b is formed so as to extend obliquely so as to extend to the side b, 5b, and a part of the outlet 4b is seen in a plan view.

On the front end side of the current plate 31, that is, on the side close to the outlets 4 b and 5 b, a liquid having a linear flow during the pumping operation and air during the self-priming operation are discharged from the discharge chamber 21.
A notch 31a for forming a space for moving from the inside toward the discharge port 26 is provided. The liquid can pass through a space S1 having a narrow width W1 and a space S2 having a wide width W2 widened by the notch 31a. FIG.
As shown in the figure, the mouth 26a is provided with the wide portion 31 of the current plate 31.
b allows the entirety to be hidden when viewed in the axial direction. Also, the height H2 of the narrow portion 31c of the current plate 31
Is preferable in that the height １ of the inside of the first case 2 is ３ to の of the height H1 without decreasing the self-priming property and reducing the eddy current. A sufficient effect can also be obtained by setting the height H2 to about 1/5 to 2/3 of the height H1.

The rectifying plate 31 is connected to the impeller 1 in the pump section 6.
The liquid formed in a spiral flow by the rotation of 0 and sent to the discharge chamber 21 vigorously is prevented from directly flowing toward the discharge port 26, and after being adjusted to a linear flow, toward the discharge chamber 26. It is meant to be moved. In other words, when the liquid discharged from the outlets 4b and 5b is discharged into the discharge chamber 21, the liquid once hits the side wall or directly hits the straightening plate 31 and moves away from the discharge port 26 (the lower side in FIG. 2). Direction). Then, the liquid gradually loses momentum and the vortex water flow disappears. As a result, the liquid discharged from the outlets 4b and 5b is rectified into a linear flow and heads toward the discharge port 26. Therefore, it is possible to prevent the liquid from being spirally sent to the inner wall of the protruding portion 26b while keeping the vortex water flow. With this configuration, the pump unit 6
The liquid sucked up by the water pumping operation is sent to the outside of the discharge port 26 as a linear flow. As a result, the liquid linearly collides with the operating portion 29 of the flow switch 28 provided outside the discharge port 26, and the flow switch 28 is reliably operated at a predetermined flow rate.

In the self-priming process, the rotation of the impeller 10 in the pump chamber 19 agitates the air with the air so that the discharge chamber 2
The gas-liquid mixture sent to 1 also collides with the current plate 31 and moves in a direction away from the discharge port 26. At this time, the gas-liquid mixture is gas-liquid separated in the discharge chamber 21 while maintaining a spiral flow. And the priming water separated from the air,
The air which is returned from the return holes 4c, 4c, 5c, 5c to the pump chamber 19 side and separated from the priming water flows from the notch 31a of the rectifying plate 31 to the discharge port 26.

The discharge chamber 21 communicates with the pump chamber 19 through the outlets 4b and 5b, so that liquid is discharged from the pump chamber 19. Therefore, in the discharge chamber 21, a mixture of priming water and air formed by stirring in the pump chamber 19 is separated into priming water and air again. The discharge chamber 21 is provided with a return hole 4c,
The pump water 19 is also connected to the pump chamber 19 by 4c, 5c, and 5c, so that the priming water separated from the mixture of the priming water and the air that has been taken out is returned to the pump chamber 19 again.

On the other hand, as shown in FIGS. 1 and 6, the inside of the pump chamber 19 includes an impeller chamber 32 which rotatably stores the impeller 10 which is driven by the drive magnet 16 of the drive motor 9, and an impeller chamber 32. And a fluid passage 33 communicating with the fluid passage 32. A fixed shaft 15 having both ends fixed to each other is provided at a central portion of the impeller chamber 32. The impeller 10 is rotatably supported on the fixed shaft 15.

The impeller chamber 32 has inlets 4a, 5a.
a communicates with the suction chamber 20. Therefore, when the impeller 10 rotates, the impeller chamber 32
The liquid and the air in 0 are sucked through the inlets 4a and 5a. Further, the impeller chamber 32 is provided with a return hole 4.
C, 4c, 5c, 5c communicate with the discharge chamber 21. Therefore, in the impeller chamber 32, the liquid led to the discharge chamber 21 is recirculated from the recirculation holes 4c, 4c, 5c, 5c.

On the other hand, the fluid passage 33 has outlets 4b, 5b
And the impeller chamber 32
The liquid and the air sent to the fluid passage 33 from the outlet are led to the discharge chamber 21 through the outlets 4b and 5b. In the fluid passage 33, a guide wall 34 is provided for smoothly guiding the liquid sent from the impeller chamber 32 to the outlets 4b and 5b.

The drive motor 9 is fixed to the second case 3. As shown in FIG. 1, the drive motor 9 includes a motor case 8, a base plate 7 fixed to the motor case 8, a stator 35, a rotor 36, and a rotation for rotatably holding the rotor 36. Shaft 37 and rotating shaft 3
7, a dish-shaped rotating body 38 fixed to one end of the rotating body 38,
, And two bearing portions 39 and 40 for supporting the rotating shaft 37. The drive motor 9 serves as a drive source in the self-priming pump 1 of the present embodiment, and
When electric power is supplied to the motor, a rotating magnetic field is generated, and the rotor section 36 is guided by the rotating magnetic field.

The motor case 8 has a cup-shaped case body 8.
e and 8f are integrally formed by fixing with a plurality of screws 8g, and are composed of a substantially cylindrical outer surface portion 41 and circular bottom portions 42 and 43 for closing both ends of the outer surface portion 41. I have. A plurality of air holes 8h are formed in the motor case 8 in order to suppress a rise in internal heat. A disk-shaped base plate 7 having a through hole 44 at its center is fixedly bonded to one circular bottom portion 42. The outer peripheral edge of the surface of the base plate 7 opposite to the side to which the motor case 8 is adhered is
Side wall 14 of motor fixing portion 12 formed in second case 3
Is fitted and fixed to the end face of the. With this configuration, the drive motor 9 is fixed to the pump unit 6, and the base plate 7 defines a magnet storage unit 17 in cooperation with the second case 3.

In the center of one of the bottoms 42,
A recess 45 is formed which is recessed toward the inside of the motor case 8. The motor case 8
A convex portion 46 protruding outside is formed. One bearing portion 39 is arranged inside the convex portion 46.
The bearing 39 rotatably supports the vicinity of one end of the rotating shaft 37. An E-shaped ring 47 is fitted near one end of the rotating shaft 37. The E-shaped ring 47 comes into contact with the bearing portion 39 to prevent the rotating shaft 37 from slipping out and moving in the thrust direction. I have.

The central portion of the convex portion 46 has a through hole 4
The rotary shaft 37 protrudes from the inside of the motor case 8 to the pump section 6 through the through hole 48. A rotating body 38 formed in a substantially disk shape is fixed to a tip of the rotating shaft 37 protruding from the motor case 8. The rotating body 38 includes a fixed portion 38 a fixed to the rotating shaft 37, a cylindrical portion 38 b extending from the fixed portion 38 a through the through hole 44 of the base plate 7 into the magnet housing 17, and a cylindrical portion 38 a. It is formed of a disk-shaped flat portion 38c which is integrally formed with the magnet housing 17 and is continuous with the magnet storage 38.

Further, a disk-shaped drive magnet 16 is fixed to the flat portion 38 c of the rotating body 38. The drive magnet 16 is separated from the impeller 10 by a wall 13 in the magnet storage 17. Are arranged opposite to each other. Although the drive magnet 16 is formed of a ferrite magnet that is magnetized ten poles alternately in the circumferential direction NS, the magnetization direction and the number of poles of the drive magnet 16 may be changed as appropriate. The rotating body 38 serves as a back yoke for the driving magnet 16 and has an effect of collecting the magnetic force of the driving magnet 16.

The center of the other circular bottom 43 is also
Like the one circular bottom portion 42, a concave portion 49 is formed, and a convex portion 50 is formed at a central portion of the concave portion 49. The other bearing part 40 is arranged inside the convex part 50. The bearing portion 40 rotatably supports the other end of the rotating shaft 37. An E-shaped ring 51 is fitted in the vicinity of the other end of the rotating shaft 37. The E-shaped ring 51 abuts on the bearing portion 40 to prevent the rotating shaft 37 from slipping out and moving in the thrust direction. I have.

The stator section 35 is arranged inside the motor case 8 as shown in FIG. The stator part 35 includes a core member 52 made of a magnetic material and the winding 5.
3, and supplies a current to the winding 53 to generate a rotating magnetic field for rotating the rotor unit 36.

On the other hand, the rotor section 36 is formed of a cylindrical member formed by laminating magnetic members such as silicon plywood and soft iron. A central portion of the rotor portion 36 has a through hole 36a.
Are provided in the through hole 36a.
Has been fixed. The rotor section 36 thus configured
Are arranged to face the core member 52 of the stator portion 35. Therefore, when the rotor section 36 is energized by the stator section 35 and generates a rotating magnetic field, the rotor section 36 is an inductor that is guided by the rotating magnetic field, and rotates integrally with the rotating shaft 37.

As shown in FIGS. 1 and 6, the impeller 10 provided in the impeller chamber 32 has two disk-shaped members 54 having the same outer diameter slightly smaller than the inner diameter of the impeller chamber 32. 55 is coaxially connected with an internal space. An inlet 56 for taking in liquid and air into the impeller 10 is formed at the center of the disc-shaped member 54 facing the tank chamber 18 side of the impeller 10.

The disk-shaped members 54 and 55 are connected by a plurality of partition walls 58 which respectively isolate the inside of the disk-shaped members 54 and 55 as a plurality of flow paths 57. This partition 5
Numerals 8 are formed so as to spirally radiate from the edge of the intake port 56 of the impeller 10 toward the outer peripheral direction.

Each of the plurality of flow paths 57 is open on one side to an edge portion of the intake port 56, and this open portion serves as an inlet 57 a of the flow path 57. In addition, a plurality of flow paths 57
Is further divided into a plurality inside. The other side is open to the outer peripheral portion of the impeller 10, and this outer peripheral portion is connected to the outlet 57 of the flow path 57 for discharging the liquid.
b. That is, each flow path 57 has an inlet 57a.
From the exit 57b to the two disc-shaped members 54, 55
And the partition wall 58, and the liquid passes through the narrow passages 57 while receiving a strong pressure. Therefore, the liquid in the suction chamber 20 is introduced into the impeller 10 from the intake port 56, passes through the inlet 57 a and the outlet 57 b of the flow path 57, and efficiently enters the impeller 10.
It is designed to be discharged outside. In addition, the priming water and the air stirred in the self-priming process by the impeller 10 and the liquid at the time of the pumping operation become a vortex water flow in the impeller chamber 32.

The intake port 56 is located at the outer peripheral portion of the impeller 10 and at the outer end of the partition wall 58.
Is formed, that is, a cutout portion 59 is formed in a cutout shape in which the surface on the side facing the tank chamber 18 of the disk-shaped member 54 is opened. The cutout portions 59 have a shape cut out from the outer peripheral end of the impeller 10 toward the center of rotation. The notch 59 is formed between the discharge chamber 21 of the tank chamber 18 and the return hole 4.
The liquid, which has been returned to the outside of the impeller chamber 32 through c, 4c, 5c, and 5c, and the air are agitated and mixed. The return holes 4c, 4c, 5c, 5
c is provided at a position corresponding to the outside of the impeller chamber 32, that is, in the vicinity of the rotation locus of the notch 59, in order to efficiently mix the liquid with the air during the self-priming process.

Further, at the center of rotation of the disk-shaped member 55 on the side facing the drive motor 9 of the impeller 10, the insertion hole 6
0 is formed, and an annular central shaft 10 a is fitted and fixed in the insertion hole 60. The inner peripheral surface of the center shaft 10a is in sliding contact with the fixed shaft 15, whereby the impeller 10 is rotatably supported by the fixed shaft 15.

The disk-shaped member 55 has a donut-shaped driven magnet 61 disposed inside and is integrally formed. The driven magnet 61 is formed of a ferrite magnet excellent in attraction force, which is magnetized ten poles alternately in the circumferential direction by NS. That is, the driven magnet 61 in the impeller 10 is arranged to face the drive magnet 16 of the drive motor 9 with the wall 13 of the motor fixing portion 12 interposed therebetween. Thereby, when the drive magnet 16 rotates,
The driven magnet 61 is driven by the drive magnet 16, and the impeller 10 rotates integrally with the rotor 36 of the drive motor 9. Note that the direction of magnetization and the number of poles of the driven magnet 61 may be changed as appropriate.

The operation of the self-priming pump 1 according to the embodiment of the present invention configured as described above will be described below.

The self-priming pump 1 is connected to a liquid source by connecting a pipe 24 to a protrusion 23b of the suction port 23 and connecting the pipe 24 to a liquid source (not shown). At this time, air stays in the pipe 24 connecting the self-priming pump 1 and the liquid source. On the other hand, a predetermined amount of priming water necessary for the self-priming process is previously supplied into the pump section 6 to such an extent that the entire impeller 10 of the impeller chamber 32 is immersed, that is, about 2/3 of the volume of the pump section 6. The self-priming pump 1 is also connected to a heat exchanger (not shown) by connecting a pipe 27 to a protruding portion 26b of the discharge port 26. Further, the heat exchanger is in communication with a liquid source.

The self-priming pump 1 set as described above
Performs a self-priming process in the following procedure. First, when power is supplied to the winding 53 inserted or wound around the core member 52 of the drive motor 9, a rotating magnetic field is generated in the stator portion 35. This rotating magnetic field is transmitted from the core member 52 to the rotor section 36.

The rotor section 36 is an inductor driven by a rotating magnetic field generated by the stator section 35, and is integrated with the rotating shaft 37 about the rotating shaft 37 as a center of rotation by the magnetic field generated by the stator section 35. To rotate. The driving magnet 16 fixed to the rotating body 38 is disposed at one end of the rotating shaft 37, and the driving magnet 16 rotates integrally with the rotating shaft 37. When the drive magnet 16 rotates in the magnet storage section 17 in this manner, the driven magnet 61 disposed opposite to the drive magnet 16 with the wall 13 of the motor fixing section 12 interposed therebetween moves the drive magnet 1.
6 and rotate. The driven magnet 61
Are integrally formed inside the disk-shaped member 55 of the impeller 10. Therefore, the impeller 10
Is rotated while being supported by the fixed shaft 15 in the impeller chamber 32 by the rotating magnetic field generated in the stator portion 35.

When the impeller 10 rotates in the impeller chamber 32 by supplying the electric current to the stator portion 35 in this manner, the priming water and the air supplied in advance in the impeller chamber 32 of the pump chamber 19 cause the impeller 10 to rotate. Stirred by rotation. At this time, the priming water and the air in the impeller chamber 32 move to the outside in the impeller chamber 32 by the centrifugal force generated by the rotation of the impeller 10. Then, the rotation center portion of the impeller 10 is in a substantially vacuum state and has a negative pressure. Thereby, the pipe 2 on the air and liquid source side in the suction chamber 20 is formed.
The air staying in 4 is gradually sucked into the central portion of impeller chamber 32 from inlets 4a and 5a. In this way, the air in the pipe 24 on the liquid source side gradually becomes impeller chamber 32.
Then, the liquid of the liquid source follows this air and is sucked toward the impeller chamber 32 following the air.

The priming water and the air, which are stirred in the impeller chamber 32 of the pump chamber 19 and are sent to the outside of the impeller chamber 32 by the centrifugal force of the impeller 10, are mixed in a notch 59 formed in the outer peripheral end portion of the impeller 10. Fluid passage 3
Sent to 3. The priming water and the air at this time are sent while forming a spiral flow. The mixture of the priming water and the air sent to the fluid passage 32 is supplied to the outlets 4b and 5b.
It is further led to the discharge chamber 21 and is moved in a direction away from the discharge port 26 by the flow regulating plate 31 provided in the discharge chamber 21, where it is separated into priming water and air. And
The priming water is supplied from the discharge chamber 21 to the return holes 4c, 4c, 5c, 5
c and is returned to the impeller chamber 32 of the pump chamber 19.
At this time, since the air is light, it rises in the discharge chamber 21 and is discharged from the notch 31a of the current plate 31 through the discharge port 23 to the heat exchanger side.

Since the notch 59 is formed near the outer peripheral end of the impeller 10 and outside the partition 58, the priming water refluxed to the outside of the impeller chamber 32 is removed by the notch 59. It will be stirred. Thereby, the agitation of the priming water and the air in the impeller chamber 32 is promoted, and the priming water and the air are efficiently mixed.

As described above, in the self-priming process, the impeller 10 is rotated while the predetermined amount of priming water is stored in the internal space of the pump section 6 to agitate the priming water with the air while the tank chamber 18 and the pump chamber are being stirred. It circulates between 19 and. On the other hand, during the self-priming process, air enters the suction chamber 20 of the tank chamber 18 from the pipe 24 on the liquid source side, and is sucked from the suction chamber 20 into the impeller chamber 32 of the pump chamber 19. Further, the air is stirred with the priming water in the impeller chamber 32 and is carried to the fluid passage 33, and is discharged from the fluid passage 33 to the discharge chamber 21 of the tank chamber 18, where it is separated from the priming water.

Further, air is discharged from the discharge chamber 21 to the discharge port 2.
It is discharged to the heat exchanger side through 6. That is, while the priming is circulating between the tank chamber 18 and the pump chamber 19, the air staying in the pipe 24 on the liquid source side is moved to the heat exchanger side while being stirred with the priming. Become.
With the movement of the air, the liquid of the liquid source follows the movement of the air and is sucked up by the self-priming pump 1.

When the air remaining in the pipe 24 on the liquid source side completely disappears, and after the self-priming process is completed, power is further supplied to the stator section 35, the liquid of the liquid source is discharged from the pipe 24. And enters the suction chamber 20 through the suction port 23. Further, the liquid is supplied from the suction chamber 20 to the inlets 4 a and 5 serving as communication ports from the impeller chamber 32.
It is sucked into a.

As described above, the liquid that has entered the impeller chamber 32 through the inlets 4 a and 5 a passes through the plurality of flow paths 57 of the impeller 10 through the inlet 57 disposed at the center of rotation of the impeller 10.
a to the outlet 57b provided in the outer peripheral portion. As described above, the liquid penetrates into the impeller chamber 32 in a state where the gap between the impeller 10 and the partition plate 4 is narrow, and passes through the narrower space of the flow path 57 formed in the inner space of the impeller 10. As a result, the fluid is efficiently and efficiently discharged to the outside of the impeller 10 in the flow path 57. At this time, the liquid is formed in a vortex water flow.

The vortexed liquid discharged outside the impeller 10 in this manner enters the fluid passage 33,
Further, the fluid is sent from the fluid passage 33 to the discharge chamber 21 through the outlets 4b and 5b. The liquid led to the discharge chamber 21 by the vortex water flow is moved by the flow regulating plate 31 in a direction away from the discharge port 26. Then, the liquid is once moved in a direction away from the discharge port 26,
The whirlpool water gradually disappears, is adjusted to a linear flow, and heads toward the discharge port 26. At this time, the liquid adjusted to a linear flow flows from the notch 31 a of the current plate 31 to the discharge port 26. As a result, the liquid becomes a linear flow and is sent from the discharge port 26 through the pipe 27 to the heat exchanger side. Therefore, when the amount of liquid passing through the discharge port 26 exceeds a predetermined amount, the flow switch 28 provided outside the discharge port 26 is reliably operated. The liquid that has been heat-exchanged in the heat exchanger is returned to the liquid source.

The embodiment of the self-priming pump of the present invention is configured as described above, but is not particularly limited thereto, and various modifications can be made without departing from the gist of the invention. . For example, in the above-described embodiment, on the side of the inner wall of the discharge chamber 21 facing the outlets 4b, 5b, and between the outlet 26 and the outlets 4b, 5b, on the side of the outlets 4b, 5b. Rectifying plate 31 erected to extend
Is provided to rectify the vortex water flow into a linear flow, but the rectifying plate 31 may have another shape. Hereinafter, modified examples of the current plate 31 will be described with reference to FIGS. 7 and 8.

FIG. 7 is a partially enlarged view of the vicinity of the current plate of the first modification in which only the current plate of the self-priming pump 1 of the above-described embodiment is modified. It is formed so as to be straight sideways. As described above, the straightening plate 62 may be formed not to be inclined but to be in the horizontal direction, but in the above-described embodiment, the liquid led out of the pump chamber 19 is smoothly moved away from the discharge port 26. The flow straightening plate is formed in an oblique direction in order to guide the flow.

Note that, as shown in FIG.
The third notch 63a may be gradually enlarged toward the separation plate 22. That is, the portion through which the liquid can pass extends over the entire width X, and the end opposite to the separation plate 22 has a narrow width W3, gradually widens toward the separation plate 22, and the portion closest to the separation plate 22 is Wide W4
And The relationship between the discharge port 26 and the opening 26a is the same as that of the rectifying plate 31 of the above-described embodiment.

As shown in FIG. 8B, a rectifying plate 64 having a notch 64a that allows the liquid to pass through only in the region Z without passing through the liquid in the region Y may be used.
The height H3 of the narrow portion of the rectifying plate 63 and the height H4 of the narrow portion of the rectifying plate 64 are preferably 1/5 to 2/3 of the internal height H1, and 1/3 to 1/2. Is more preferred. In addition, the opening 26a of the discharge port 26 has a rectifying plate 31,
It is formed so as to be hidden by 63, 64,
The mouth 26a may be formed so that a part thereof can be seen. Further, a part of the rectifying plate 31 or the rectifying plate 62 is formed so that a part of the rectifying plate 31 or the rectifying plate 62 covers the outlet 4b when viewed from the axial direction.
The discharge port 26 and the outlet 4b may be separated from each other with the current plate interposed therebetween.

The above-described self-priming pump 1 is a so-called closed-blade type self-priming pump in which liquid passes through the internal space of the impeller 10. In the present invention, the liquid is formed on the impeller surface. It is also possible to apply to a so-called open blade type self-priming pump that stirs at the blades.

A notch 59 is provided at the outer peripheral end of the impeller 10 to promote the agitation of the priming water and the air during the self-priming process. It may be adopted, or the cutout shape may be changed to another shape or sometimes not. Note that the shape of the notch portion 59 affects the pump efficiency and the self-priming efficiency of the self-priming pump 1.
It is desirable that the blade portion be appropriately adjusted to the outer diameter of 0.
In addition, since the size of the notch 10 affects the quietness of the self-priming pump 1, the size of the impeller 10 is appropriately adjusted to suppress noise in addition to the pump efficiency and the self-priming efficiency. Is desirable.

Further, since the pump efficiency of the self-priming pump 1 is affected by the shape, angle, number and the like of the partition 58 which plays a role of stirring the liquid,
It is desirable that the shape, angle, number and the like of 8 are appropriately set according to the desired pump efficiency.

The return holes 4 c, 4 c, 5 c, for returning the liquid discharged to the discharge chamber 21 to the impeller chamber 32.
5c is provided at two places, but may be provided at one place or three or more places. Further, the return holes 4c, 4c, 5c, 5c are provided near the rotation locus of the cutout portion 59 of the impeller 10, but the return holes 4c, 4c, 5c, 5c need not be provided at this position.
When a desired self-priming efficiency is obtained, any position where the discharge chamber 21 and the impeller chamber 32 are inserted may be used.

Further, in the above-described embodiment, as the flow rate detector, the liquid having a predetermined flow rate or more passes through the inside of the pipe 27 to rotate the operation section 29, and this operation section 2
Although the flow switch 28 which turns on the switch by detecting the rotation of 9 is used, another configuration may be used. For example, a float member that can move up and down along a column is disposed in a tapered glass tube, and when a liquid passes through the glass tube, the position of the float member changes, and a glass taper tube that detects a flow rate based on the change position. A flow meter may be used. Further, a Hall sensor type flow switch that detects a change in the position of a float member provided with a magnet member with a Hall sensor and detects the flow rate may be used.

[0077]

As described above, according to the first aspect of the present invention, a rectifying plate for regulating the flow of the liquid is provided near the discharge port of the discharge chamber, so that a vortex water flow occurs during the pumping operation. The liquid is adjusted to a linear flow by the flow regulating plate, sent to the discharge port, and discharged from the discharge port to the outside. As a result, the detection of the liquid discharged from the discharge port becomes reliable,
Control of various devices including each connected device can be facilitated.

According to the second aspect of the present invention, since the rectifying plate is provided between the outlet and the discharge port, the liquid discharged from the outlet collides with the rectifying plate and enters the discharge chamber inside. You will be guided. Therefore, it is possible to prevent the liquid from directly moving in the direction of the discharge port in the state of the vortex water flow, and to discharge the liquid in a linear flow after the disappearance of the vortex water flow inside the discharge chamber from the discharge port. it can.

According to the third aspect of the present invention, since the rectifying plate is provided on the surface of the discharge chamber wall facing the outlet, the liquid discharged from the outlet collides with the rectifying plate efficiently and is discharged. You will be guided to the inside. Therefore, the liquid can be efficiently rectified from the vortex flow state to a linear flow. Further, since the rectifying plate is erected so as to extend to the outlet port side, in the self-priming process, air can be efficiently sent from the tip end side of the rectifying plate to the discharge port side.

According to the fourth aspect of the present invention, since the flow rate detector is provided at the discharge port, the end of the self-priming process is detected by using the change in the discharge amount of the liquid, and based on that, the other end is detected. Can be controlled.

According to the fifth aspect of the present invention, since the flow rate detector is constituted by a flow switch having an operating part, the self-priming process can be performed with a simpler configuration based on the discharge of a predetermined amount or more of liquid. It is possible to detect the termination and control other devices based on the termination.

According to the invention of claim 6, when the self-priming process is terminated when the operating part of the flow switch is activated, and the external control device is controlled and driven based on this point, it is simpler. Control such as turning on / off the external control device can be performed by a simple control method.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a self-priming pump according to an embodiment of the present invention.

FIG. 2 is a plan view of a first case of the self-priming pump when FIG. 1 is viewed from an arrow II direction.

FIG. 3 is a plan view of a partition plate of the self-priming pump as viewed from a direction indicated by an arrow III in FIG. 1;

FIG. 4 is a plan view of a rubber pad of the self-priming pump as viewed from a direction indicated by an arrow III in FIG. 1;

FIG. 5 is a partial enlarged view of the vicinity of the installation position of the straightening plate of the first case in FIG. 2 and is a cross-sectional view along line VV.

FIG. 6 is a plan view of a second case and an impeller of the self-priming pump when FIG. 1 is viewed from a direction indicated by an arrow III.

FIG. 7 is a partially enlarged view showing the vicinity of a discharge port of a first modified example of the self-priming pump according to the embodiment of the present invention.

FIG. 8 is a partially enlarged view of the vicinity of the straightening plate installation positions of the second and third modified examples of the self-priming pump according to the embodiment of the present invention, viewed in the same direction as FIG. 5, and FIG. It is a top view of the current plate of the 2nd modification, (B) is a top view of the current plate of a 3rd modification.

FIG. 9 is a longitudinal sectional view showing a conventional self-priming pump.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

[Explanation of symbols]

 Reference Signs List 1 self-priming pump 4b outlet 5b outlet 6 pump section 9 drive motor 10 impeller 18 tank chamber 19 pump chamber 20 suction chamber 21 discharge chamber 23 suction port 26 discharge port 28 flow switch (flow detector) 29 operating part 31 rectification Board

Claims (6)

[Claims] 1. A tank chamber comprising a suction chamber provided with a suction port for sucking a liquid and a discharge chamber provided with a discharge port for discharging the sucked liquid, and the liquid sucked from the suction chamber. A pump section having a pump chamber for rotatably storing an impeller for sending out to the discharge chamber side,
A drive motor for rotating the impeller,
By rotating the impeller with a predetermined amount of priming water stored in the internal space of the pump section, a self-priming process of circulating between the tank chamber and the pump chamber while stirring the priming water and air is performed. A self-priming pump, which performs a water pumping operation via a pump, wherein a rectifying plate for regulating the flow of the liquid is provided near the discharge port of the discharge chamber. 2. The self-priming type according to claim 1, wherein the flow regulating plate is provided between an outlet for sending out the liquid from the pump chamber side to the discharge chamber side and the discharge port. pump. 3. The discharge plate according to claim 2, wherein the flow straightening plate is formed on a surface of the discharge chamber wall facing the outlet so as to extend toward the outlet. Self-priming pump. 4. The self-priming pump according to claim 1, wherein a flow rate detector for detecting a flow rate of the liquid is provided outside the discharge port. 5. The self-priming pump according to claim 4, wherein said flow rate detector is constituted by a flow switch having an operating portion which is activated when a predetermined amount or more of said liquid collides. 6. The self-priming pump according to claim 5, wherein the end of the self-priming process is detected by the flow switch.