Vortex pump

Abstract

By allowing adjustment of dimensions related to pump characteristics and reducing the load on the shaft and motor, this provides a pump with improved work efficiency. [Solution] The vortex pump according to the present invention comprises an impeller 6 having an impeller blade portion 32 on its outer circumference, and a pump casing 3 that forms an impeller flow path 17 around the impeller 6. The pump casing 3 has a suction port 11, a discharge port 12, and a flow path communicating with the impeller flow path 17. The flow path has a suction port side flow path 15 communicating with the suction port 11 and the impeller flow path 17, and a discharge port side flow path 16 communicating with the impeller flow path 17 and the discharge port 12. A partition wall 18 is provided between the suction port side flow path 15 and the discharge port side flow path 16, and an adjustment tongue portion 13 is provided between the partition wall 18 and the impeller 6 to adjust the size of the gap 21 between the partition wall 18 and the impeller 6. This achieves the intended purpose.

Description

Technical Field

[0001] The present invention relates to a self-priming vortex pump.

Background Art

[0002] Conventionally, this type of pump is known to rotate an impeller connected to the rotation shaft of a motor to suck water from the suction port of the casing and discharge it from the discharge port. (For example, refer to Patent Document 1) Hereinafter, the pump will be described with reference to FIG. 6.

[0003] As shown in FIG. 6, a conventional vortex pump 100 includes an impeller 103 driven by a motor 101 and having an impeller blade portion 102 on the outer peripheral portion, and a casing 105 that forms an impeller flow path 104 around the impeller 103. The casing 105 has a suction port 106, a discharge port 107, and a flow path communicating with the impeller flow path 104. The flow path has a suction port side flow path 108 communicating with the suction port 106 and the impeller flow path 104, and a discharge port side flow path 109 communicating with the impeller flow path 104 and the discharge port 107. There is a gap between a partition wall 110 between the suction port side flow path 108 and the discharge port side flow path 109 and the impeller 103.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventionally, a vortex pump includes a casing and a motor, and the power of the motor is transmitted to the impeller through the motor rotation shaft, and the impeller rotates to generate a water flow.

[0006] Conventional vortex pumps ensure their pumping characteristics by minimizing the gap between the bulkhead and the impeller. However, because the gap changes depending on the combination of parts, stable management is difficult.

[0007] Therefore, the present invention aims to solve the above-mentioned conventional problems and to provide a vortex pump with less variation in gaps between parts and stable characteristics. [Means for solving the problem]

[0008] And in order to achieve this objective, a pump according to one aspect of the present invention is An impeller having an impeller blade section on its outer circumference, The system comprises a casing that forms an impeller flow path around the impeller, The casing has an inlet, an outlet, and a passage that communicates with the impeller passage, The aforementioned flow path is A suction port side passage that communicates with the suction port and the impeller passage, It has the impeller flow path and the discharge port side flow path that communicates with the discharge port, The device is characterized by having an adjustment tongue between the partition wall between the suction port side flow path and the discharge port side flow path and the impeller, which adjusts the size of the gap between the partition wall and the impeller, thereby achieving the intended purpose. [Effects of the Invention]

[0009] According to the present invention, since the gap between the partition wall and the impeller can be adjusted after the impeller is assembled, the characteristics are stable and a high-quality pump can be provided. [Brief explanation of the drawing]

[0010] [Figure 1] Exploded perspective view showing a vortex pump in Embodiment 1 of the present invention. [Figure 2] Front cross-sectional view of the pump casing of the vortex pump. [Figure 3]Front cross-sectional view of the pump casing of a vortex pump [Figure 4] Front cross-sectional view of the pump casing of a vortex pump [Figure 5] Perspective view of the impeller of a vortex pump [Figure 6] Schematic diagram showing a conventional pump

Mode for Carrying Out the Invention

[0011] The vortex pump according to one aspect of the present invention includes an impeller having an impeller blade portion on its outer peripheral portion, and a casing that forms an impeller flow path around the impeller, and is provided with the casing has a suction port, a discharge port, and a flow path communicating with the impeller flow path, the flow path is a suction port side flow path communicating with the suction port and the impeller flow path, and a discharge port side flow path communicating with the impeller flow path and the discharge port, and has between the partition wall between the suction port side flow path and the discharge port side flow path and the impeller, there is an adjustment tongue portion for adjusting the dimension of the gap between the partition wall and the impeller, which is characterized in that

[0012] According to this configuration, after the impeller is assembled, the gap between the partition wall and the impeller can be adjusted, so that a pump with stable characteristics and good quality can be provided.

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) In FIG. 1, a vortex pump 1 according to an embodiment of the present invention is shown. FIG. 2 shows a front cross-sectional view of the pump casing 3. FIG. 3 is an enlarged view showing the front cross-section of the pump casing 3.

[0014] As shown in FIGS. 1, 2, and 3, the vortex pump 1 has a pump casing 3, a casing cover 7, an impeller 6, and a motor 2.

[0015] The pump casing 3 includes a suction port 11, a discharge port 12, an impeller flow path 17 around the impeller, and a flow path communicating with the impeller flow path 17.

[0016] The flow path has a suction port side flow path 15 communicating with the suction port 11 and the impeller flow path, and a discharge port side flow path 16 communicating with the impeller flow path 17 and the discharge port 12. There is a partition wall 18 between the suction port side flow path 15 and the discharge port side flow path 16. Between the partition wall 18 and the impeller 6, there is an adjusting tongue portion 13 for adjusting the dimension of the gap between the partition wall 18 and the impeller 6.

[0017] The motor 2 includes a motor rotating shaft 5. An impeller 6 is fixed to a protruding portion at one end of the motor rotating shaft 5. The impeller 6 is arranged so as to be enclosed by the pump casing 3 and the casing cover 7.

[0018] On the side opposite to the one end of the motor rotating shaft 5 to which the impeller 6 is fixed, a cooling fan 8 is provided at a protruding portion at the other end of the motor rotating shaft 5. The cooling fan 8 is covered by a fan cover 9. The fan cover 9 is fixed to the motor 2.

[0019] A terminal cover 10 is provided at the top of the motor 2. The terminal cover 10 is fixed to the motor 2.

[0020] The pump casing 3 has a suction port 11 communicating with the suction port side flow path 15 on the upstream side, and a discharge port 12 communicating with the discharge port side flow path 16 on the downstream side.

[0021] The power of the motor 2 is transmitted to the impeller 6 via the motor rotating shaft 5, and the impeller 6 rotates. When the impeller 6 rotates, the water (liquid) sucked from the suction port 11 is discharged from the discharge port 12 through the suction port side flow path 15 and the discharge port side flow path in the pump casing 3. At this time, a gap 21 occurs between the adjustment tongue portion 13 and the outer circumference portion 31 of the impeller due to the dimensional tolerances of each component. If the gap 21 becomes large, the suction port side flow path 15 and the discharge port side flow path 16 will be bypassed, leading to a decrease in pump performance. Therefore, in order to ensure pump performance, it is necessary to make the gap 21 as small as possible.

[0022] Figure 4 is an enlarged front cross-section of the pump casing 3, showing the adjustment tongue 13 in the moved position. Figure 5 is a perspective view of the impeller.

[0023] The assembly procedure for the vortex pump 1 will now be described. As shown in Figures 3, 4, and 5, the motor 2 is attached to the pump casing 3, and after the motor 2 is attached to the pump casing 3, the impeller 6 is attached to the motor rotating shaft 5. The impeller 6 has an impeller blade portion 32 on its outer circumference.

[0024] Therefore, in this embodiment, the adjustment tongue 13 rotates with the rotation axis on one side of the impeller 6 in the circumferential direction as its center of rotation, and the other side of the impeller 6 in the circumferential direction is movable from the partition wall 18 side to the impeller 6 side. Specifically, the adjustment tongue 13 has an elongated shape and has an axial hole 24 on one side in the longitudinal direction and an adjustment hole 25 on the other side in the longitudinal direction. The adjustment tongue 13 is rotatably supported by a rotation axis screw 23 and an adjustment screw 22.

[0025] The shaft hole 24 is cylindrical and is located on one side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the right side of the adjustment tongue 13 in Figure 3, on the discharge port side flow path 16 side). The diameter of the shaft hole 24 is slightly larger than the diameter of the rotating shaft screw 23. The rotating shaft screw 23 is screwed to the pump casing 3 via the shaft hole 24. The adjustment tongue 13 is rotatably supported by the rotating shaft screw 23 in the pump casing 3. The rotating shaft screw 23 is the rotation axis of the adjustment tongue 13.

[0026] The adjustment hole 25 is elongated and is located on the other side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the left side of the adjustment tongue 13 in Figure 3, on the suction port side flow path 15 side). The adjustment hole 25 is an elongated hole extending from the partition wall 18 side to the impeller 6 side, and the width of the adjustment hole 25 is slightly larger than the shaft diameter of the adjustment screw 22. The adjustment screw 22 is screwed to the pump casing 3 via the adjustment hole 25. The adjustment tongue 13 can be fixed to the pump casing 3 by the adjustment screw 22 after moving the adjustment hole 25 side of the adjustment tongue 13 from the partition wall 18 side to the impeller 6 side.

[0027] This allows the gap 21 between the bulkhead 18 and the outer circumference 31 of the impeller to be adjusted even after the vortex pump 1 has been assembled. By rotating the adjustment screw 22 after inserting the impeller 6, the adjustment tongue 13 can be rotated around the rotation axis screw 23 to move closer to the outer circumference 31 of the impeller.

[0028] Specifically, the distance between one side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the right side of the adjustment tongue 13 in Figure 4, on the discharge side flow path 16 side) and the partition wall 18 is shorter than the distance between the other side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the left side of the adjustment tongue 13 in Figure 4, on the suction side flow path 15 side) and the partition wall 18. The distance between the other side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the left side of the adjustment tongue 13 in Figure 4, on the suction side flow path 15 side) and the impeller 6 is shorter than the distance between one side of the adjustment tongue 13 in the circumferential direction of the impeller 6 (the right side of the adjustment tongue 13 in Figure 4, on the discharge side flow path 16 side) and the impeller 6.

[0029] As a result, in the direction of rotation of the impeller 6, the gap between the downstream adjustment tongue 13 and the impeller 6 becomes smaller than the gap between the upstream adjustment tongue 13 and the impeller 6. Therefore, the amount of water pressurized by the impeller 6 that bypasses the gap 21 and returns to the suction port side flow path 15 is reduced. Consequently, the pressurized water is smoothly transported to the discharge port, and a decrease in pump performance can be suppressed. Note that the direction of rotation of the impeller 6 is the opposite of clockwise in Figure 4.

[0030] Although the pump according to the present invention has been described above based on embodiments, the present invention is not limited to these embodiments. Within the scope of the present invention, various modifications that a person skilled in the art could conceive of are applied to these embodiments, as well as configurations constructed by combining components from different embodiments, are also included without departing from the spirit of the present invention. [Industrial applicability]

[0031] The vortex pump according to the present invention is effective as an efficient pump because it allows for adjustment of dimensions related to the pump characteristics and reduces the load on the shaft and motor. [Explanation of Symbols]

[0032] 1. Vortex pump 2 motors 3. Pump casing 5. Motor rotation shaft 6 Impellers 7 Casing cover 8 Cooling Fans 9 Fan Cover 10 Terminal cover 11 Inlet 12 Outlet 13 Adjustment of the tongue 15 Inlet side flow path 16 Discharge port side flow path 17 Impeller flow path 18 Bulkhead 21 gaps 22 Adjustment screws 23 Rotating shaft screw 24 shaft holes 25 Adjustment hole 31 Impeller outer circumference 32 Impeller blade section 100 Vortex pump 101 Motor 102 Impeller blade section 103 Impeller 104 Impeller Flow Channel 105 Casing 106 Inlet 107 Discharge port 108 Inlet side flow path 109 Discharge port side flow path 110 Bulkhead

Claims

1. An impeller having an impeller blade section on its outer circumference, The system comprises a casing that forms an impeller flow path around the impeller, The casing has an inlet, an outlet, and a passage that communicates with the impeller passage, The aforementioned flow path is A suction port side passage that communicates with the suction port and the impeller passage, It has the impeller flow path and the discharge port side flow path that communicates with the discharge port, A vortex pump having an adjustment tongue between the partition wall between the suction-side flow path and the discharge-side flow path and the impeller, which adjusts the size of the gap between the partition wall and the impeller.

2. The vortex pump according to claim 1, wherein the adjustment tongue is pivoted on one rotation axis in the circumferential direction of the impeller, and the other side in the circumferential direction of the impeller is movable toward the impeller.

3. The vortex pump according to claim 2, wherein the rotating shaft of the adjustment tongue is on the discharge port side flow path side.

4. The distance between one side of the adjustment tongue portion in the circumferential direction of the impeller and the partition wall is, The distance between the other side of the adjustment tongue in the circumferential direction of the impeller and the partition wall is shorter than the distance between the other side of the adjustment tongue and the partition wall. The distance between one side of the adjustment tongue portion in the circumferential direction of the impeller and the impeller is, The vortex pump according to claim 3, wherein the length of the adjustment tongue is greater than the distance between the other side of the impeller in the circumferential direction and the impeller.

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