JP4651170B2 - Vertical shaft pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical shaft pump used to pump water from a low place to a high place.
[0002]
[Prior art]
Vertical shaft pumps are used in various drainage facilities. As shown in FIG. 7, as an example, a vertical pump is installed and used in the drainage station of the building so as to drain the water in the water absorption tank to the discharge water tank. A discharge bowl having a pump shaft 5 extending in the vertical direction and an impeller 6 attached to a lower end portion of the pump shaft 5 and having a bell mouth 7 at the lower end in a floor 3 below the pump building 4 provided on the upper side. 8 and a pump main body 11 comprising a pumping pipe 9 and an elbow pipe 10 sequentially arranged on the discharge bowl 8, the lower end of the elbow pipe 10 is placed on the lower floor through a ring-shaped mounting seat 12. 3 so that the pump body 11 is supported by the lower floor 3, and an upper floor 2 is provided above the lower floor 3, and a vertical shaft is provided on the upper floor 2. Installed a prime mover 13 and a speed reducer 15 for the pump. The upper end of the pump shaft 5 is taken out through the elbow pipe 10 and connected to a speed reducer 15 installed on the upper floor 2, and the pump shaft is driven by the prime mover 13 via the output shaft 14 and the speed reducer 15. 5 is connected to a main pipe 18 having a discharge valve 16 at an intermediate portion and a backflow prevention valve 17 at an outlet portion of the elbow pipe 10. The outlet portion faces the inside of the discharge water tank 19, and the pump shaft 5 is driven by the drive of the prime mover 13 to rotate the impeller 6, thereby discharging the water sucked into the discharge bowl 8 through the bell mouth 7 upward. The discharge water tank 19 is discharged through the pumping pipe 9, the elbow pipe 10, and the main pipe 18.
[0003]
However, in the case of such a conventional vertical shaft pump, the pump building 4 has a two-floor structure having an upper floor 2 for installing the prime mover 13 and a lower floor 3 for installing the pump body 11. There is a problem that the height of the building 4 is increased and the construction cost is increased, and the maintenance needs to be performed on the upper and lower floors 2 and 3, so that the entire maintenance work becomes complicated.
[0004]
Therefore, in order to install the prime mover and pump body on the same floor, instead of using a model that uses two upper and lower floors to install the prime mover and pump body, maintenance can be performed on one floor. Conventionally, as schematically shown in FIG. 8, the horizontal input shaft 20 connected to the output shaft of the prime mover and the rotational force received from the horizontal input shaft 20 side through the intermediate transmission mechanism portion 22 are conventionally used. A power transmission mechanism 23 in which a vertical output shaft 21 and the like adapted to transmit to the upper end of the pump shaft 5 is assembled to the casing 24 is integrally attached to the back outer wall portion of the elbow pipe 10 of the pump main body 11, and the pump A motor can be installed on the floor corresponding to the lower floor 3 in FIG. 7 installed through the main body 11 (Japanese Patent Laid-Open No. 11-193799), as schematically shown in FIG. 8, a power transmission mechanism in which a horizontal input shaft 20, a vertical output shaft 21 and the like similar to those shown in FIG. 8 are assembled to a casing 24 is configured as a separate power transmission unit 25, and the power transmission unit 25 is connected to the pump body. 11 (Japanese Patent Laid-Open No. 2000-27785) has been proposed in which the elbow pipe 10 is detachably installed on two upper and lower installation seats 26a, 26b provided on the back side outer wall portion.
[0005]
[Problems to be solved by the invention]
However, in the case of the vertical shaft pump shown in FIG. 8, since the power transmission mechanism 23 is integrated with the elbow pipe 10, the shape (casting shape) of the elbow pipe 10 becomes very complicated, and much effort is required for maintenance. There is a problem that requires.
[0006]
On the other hand, in the case of the vertical pump shown in FIG. 9, since the power transmission mechanism has a unit structure, the maintenance is easier than in the case of the vertical pump shown in FIG. , 26b at the same time, it is necessary to attach the power transmission unit 25 at the same time. Moreover, since the two installation seats 26a and 26b are provided on the back side outer wall portion of the elbow pipe 10, there is a problem that the processing surface of the seat increases.
[0007]
Therefore, the present invention is intended to provide a vertical shaft pump that can solve the problems of the conventional system shown in FIGS. 8 and 9 and can easily attach and detach the power transmission unit during maintenance. is there.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has a pumping pipe and an elbow pipe sequentially arranged on a discharge bowl that houses an impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft is outward from the elbow pipe. In the vertical shaft pump in which the pump body which is penetrated and taken out so as to protrude upward is installed so as to penetrate downward on the floor and the pump shaft is driven by a prime mover, on the upper back side of the elbow pipe A horizontal input shaft connected to a motor installed on the same floor as the floor on which the pump body is installed, and provided with only one installation seat so that the required amount extends horizontally from the pump shaft through portion to the outer side of the elbow pipe a power transmission unit for a rotational force comprising a power transmission mechanism to convey to the pump shaft from the horizontal input shaft side, to the installation seat, provided on the lower surface plate of the upper casing with the power transmission unit Removably installed through the base and configuration as assembled to the pump body.
[0009]
Since the installation seat is provided at only one place on the pump body, the power transmission unit can be easily attached and detached, and maintenance can be easily performed.
[0010]
Further, the lower surface of the upper casing with the power transfer unit, so are the structure in which the mounting base for mounted to the installation seat, it is possible to stably support the power transmission unit.
[0011]
Further, the vertical output shaft is supported by being inserted into the shaft insertion holes provided in the upper surface plate and the lower surface plate of the upper casing of the power transmission unit, and the shaft sealing hole portion of the lower surface plate is equipped with an oil seal device, By installing a water seal device in the pump shaft penetration part of the elbow pipe so that the oil seal device and the water seal device face each other up and down, the oil leakage of the power transmission unit and leakage into the power transmission unit Mixing of pump water can be prevented beforehand.
[0012]
Furthermore, by adopting a configuration in which a tray portion is formed on the upper surface portion of the water sealing device, drainage from the pump water generated on the water sealing device can be received by the tray portion, and lubricating oil leaks from the oil sealing device. Even if such a situation occurs, it can be received by the tray portion, and scattering to the surroundings can be prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 to 4 show an embodiment of the present invention. Like the vertical pump shown in FIG. 7, the pump body 11 is connected to the lower end portion of the elbow pipe 10 via a ring-shaped mounting seat 12. In the structure installed so as to be penetrated and supported by the floor 3, the installation seat 28 is provided on the back side outer wall portion of the elbow pipe 10 so as to project a required amount horizontally outward from the position of the pump shaft penetration portion 27. The horizontal input shaft 20 connected to the output shaft 14 of the prime mover 13 installed on the same floor as the floor 3 on which the pump body 11 is installed and the rotational force received from the horizontal input shaft 20 side. A power transmission unit 29 having a power transmission mechanism 49 adapted to transmit to the pump shaft 5 is detachably installed on the installation seat 28 from above.
[0015]
More specifically, the installation seat 28 is shaped so as to surround the pump shaft penetrating portion 27 of the elbow pipe 10 as viewed from above, and both ends of the enclosure extend a required amount toward the outer side of the elbow pipe 10. In addition, the upper surface serving as a seating surface is processed horizontally, and is supported on the elbow pipe 10 by the rib 30 protruding from the back side outer wall portion of the elbow pipe 10.
[0016]
The power transmission unit 29 includes an upper casing 31 that surrounds a position on the upper end side of the pump shaft 5 projecting outward from the back outer wall portion of the elbow pipe 10 and projects horizontally, and the installation seat. 28, a base 33 provided on the lower surface of the upper casing 31 so as to surround the pump shaft 5 so as to surround the pump shaft 5 and detachably attached to the installation seat 28 with bolts 32, and an outer peripheral portion of the upper casing 31. And a side casing 34 which is continuously provided so as to extend downward toward the side and is inserted between the ribs 30 at both ends of the installation seat 28.
[0017]
A shaft box 35 is attached to the side casing 34 at a required height position of the outer plate 34a in a horizontal direction. The shaft box 35 has a bevel gear 36 at the front end (inner end). A horizontal input shaft 20 whose end portion (outer end portion) can be connected to the output shaft 14 of the prime mover 13 by a joint 37 is inserted, and the bearing 38 that holds the horizontal input shaft 20 in the shaft box 35 is rotatable. The intermediate shaft 40 provided on the lower end side with the bevel gear 39 supported by the bevel gear 36 is passed through the lower surface plate 31b of the upper casing 31 from the position in the side casing 34, and the position of the upper surface plate 31a. When the upper end of the intermediate shaft 40 is supported by a bearing 42 in a shaft box 41 fixed to the upper surface plate 31a of the upper casing 31. Both The lower end of the intermediate shaft 40, it is constituted such that it is supported by the radial bearing 44 of the axle box 43 which is fixed to the inner wall of the side casing 34.
[0018]
The upper casing 31 is provided with shaft insertion holes 45 and 46 in the upper surface plate 31a and the lower surface plate 31b, and these shaft insertion holes 45 and 46 are fitted to the outer periphery of the upper end portion of the pump shaft 5 from above. The pipe-shaped vertical output shaft 21 that is key-coupled is arranged, and the vertical output shaft 21 is connected to the thrust bearing 47 and the radial bearing 48 at the portion of the shaft insertion hole 45 and at the portion of the shaft insertion hole 46. A gear 50 is attached to the outer periphery of a portion of the vertical output shaft 21 that is rotatably supported by the radial bearing 48 and located in the upper casing 31, and the gear 50 is attached to the upper end of the intermediate shaft 40. The horizontal input shaft 20 is rotated by driving the prime mover 13 and the rotational force is transmitted to the intermediate shaft 40 through the bevel gears 36 and 39. Further, the gear 51 and the gear 50 are rotated. The rotational speed after shifting are to tell the pump shaft 5 via a vertical output shaft 21. A power transmission mechanism 49 is configured between the bevel gear 36 and the vertical output shaft 21.
[0019]
Furthermore, an oil seal device 52 is provided at the lower position of the shaft insertion portion 46 formed on the lower surface plate 31 b of the upper casing 31, while the pump shaft penetrating portion 27 of the elbow pipe 10 has a bush 53 in addition to the bush 53. A water sealing device 54 is provided on the upper portion of the bush 53 so that the oil sealing device 52 and the water sealing device 54 face each other up and down. The water sealing device 54 includes drainage by pump water and the oil sealing device 52. The tray portion 54a for receiving the lubricating oil leaked from the top is formed on the upper surface portion.
[0020]
Reference numeral 55 denotes a head cover that covers the upper end portion of the vertical output shaft 21 protruding upward from the upper surface plate 31 a of the upper casing 31, and 56 denotes an oil sump formed at the lower portion of the side casing 34.
[0021]
Since the above configuration is adopted, the elbow pipe 10 of the pump body 11 is attached to the prime mover 13 connected to the horizontal input shaft 20 by selecting the height position of the horizontal input shaft 20 according to the output shaft 14 of the prime mover 13. It can be installed on the floor 3 and the height of the vertical shaft pump can be lowered. Therefore, the pump building 4 as shown in FIG. 7 can be constructed as a single floor type with a low height. Further, even when the horizontal axis pump is changed to the vertical axis pump, it is not necessary to reconstruct the building.
[0022]
In the above, as shown in FIG. 4, the power transmission unit 29 can be easily installed only by mounting the base 33 portion on the installation seat 28 provided on the elbow pipe 10 of the pump body 11 and fastening the bolt 32. At the same time, it can be easily separated by removing the bolt 32, so that maintenance can be performed easily. Further, although there is only one installation seat 28, it has a shape that extends long from the periphery of the pump shaft penetrating portion 27 toward the outer side of the back side outer wall portion of the elbow tube 10, and Since it is firmly supported by the ribs 30 raised from the back outer wall, the power transmission unit 29 can be stably installed, and the side casing 34 of the power transmission unit 29 has both end portions of the installation seat 28 attached to each other. Since it is made to enter between the supporting ribs 30, the whole can be designed compactly. Further, on the power transmission unit 29 side, an oil seal device 52 is provided in the shaft insertion hole 46 portion of the upper casing bottom plate 31b, and on the pump body 11 side, a water seal is provided on the pump shaft through portion 27 of the elbow pipe 10. Since the device 54 is provided, it is possible to prevent the occurrence of a situation in which the pump water is mixed into the power transmission unit 29 and causes the operation to stop, and the pump is provided on the water seal device 54. Even if drainage occurs due to water or the lubricating oil leaks from the oil sealing device 52, the tray portion 54a provided on the upper surface of the water sealing device 54 can receive the drain and the lubricating oil. Therefore, the surroundings are not contaminated with drain or oil.
[0023]
Next, FIG. 5 shows another embodiment of the present invention. In the same configuration as the vertical shaft pump shown in FIGS. 1 to 4, a top casing 57 is disposed further above the upper casing 31 of the power transmission unit 29. In the top casing 57, the thrust bearing 47 that supports the vertical output shaft 21, the bearing 42 that supports the upper end of the intermediate shaft 40, and the like are accommodated in the top casing 57, and above the intermediate shaft 40. An oil pump 59 is installed on the top casing 57 positioned so that the input shaft 58 projects downward into the top casing 57, while an extension shaft 60 is provided at the upper end of the intermediate shaft 40. And transmission gears 61 and 62 are attached to the input shaft 58 of the oil pump 59 so as to mesh with each other so that the oil pump 59 is driven by the rotational force of the intermediate shaft 40. The oil supply pump 59 is connected to the other end of the pipe 63 whose one end is connected to the oil reservoir 56 of the side casing 34, and the lubricating oil in the oil reservoir 56 is sucked up by the drive of the oil supply pump 59. It is designed to be supplied to gears and bearings.
[0024]
If it comprises as shown in FIG. 5, a part of drive force of the motor | power_engine 13 can be taken out, the oil supply pump 59 can be driven, and lubricating oil can be circulated and used efficiently.
[0025]
The present invention is not limited to the above embodiment. For example, as shown in FIG. 6, the horizontal input shaft 20 may be disposed obliquely with respect to the side casing 34, and the thrust bearing 47 Of course, it may be assembled at the position of the lower radial bearing 48, and various modifications can be made without departing from the scope of the present invention.
[0026]
【The invention's effect】
As described above, according to the vertical shaft pump of the present invention, the pumping pipe and the elbow pipe are sequentially arranged on the discharge bowl that houses the impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft is arranged outside the elbow pipe. In the vertical shaft pump in which the pump body that is taken out so as to protrude upward and protrude upward is penetrated downward on the floor and the pump shaft is driven by a prime mover, the back side of the elbow pipe A horizontal input that is connected to a motor installed on the same floor as the floor on which the pump body is installed, and is provided with a single installation seat at the top so that the required amount extends horizontally from the pump shaft penetration to the outside of the elbow pipe. the rotational force from the shaft and the horizontal input shaft of the power transmission unit including a power transmission mechanism to convey the above pump shaft, in the installation seat, the lower surface of the upper casing with the power transmission unit Since the detachable installed configuration as assembled to the pump body through a base provided on, can be performed easily attached and detached in the power transmission unit time of maintenance and the like, also has the power transmission unit the lower plate of the upper casing, so are the structure in which the mounting base for mounted to the installation seat, Ru can be stable supporting a power transmission unit in the installation seat only one location. Further, the vertical output shaft is supported by being inserted into the shaft insertion holes provided in the upper surface plate and the lower surface plate of the upper casing of the power transmission unit, and the shaft sealing hole portion of the lower surface plate is equipped with an oil seal device, By installing a water seal device in the pump shaft penetrating part of the elbow pipe so that the oil seal device and the water seal device face each other up and down, leakage of lubricating oil in the power transmission unit and into the power transmission unit The pump water can be prevented from being mixed and the reliability can be improved. Further, the drain is formed on the water sealing device by forming the tray portion on the upper surface of the water sealing device. Even if the oil is generated or the lubricating oil leaks from the oil seal device, it can be received by the tray portion, and excellent effects such as prevention of surrounding contamination can be exhibited.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a vertical shaft pump according to the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;
FIG. 4 is a perspective view showing a connection relationship between an installation seat and a base.
FIG. 5 is a schematic diagram showing another embodiment of the present invention.
FIG. 6 is a plan view showing still another embodiment of the present invention.
FIG. 7 is a schematic view showing an example of a conventional vertical shaft pump.
FIG. 8 is a partial view showing an example of a conventional vertical pump made to improve the conventional vertical pump of FIG. 7;
9 is a partial view showing another example of the conventional vertical pump made to improve the conventional vertical pump of FIG. 7; FIG.
[Explanation of symbols]
3 Floor 5 Pump shaft 6 Impeller 8 Discharge bowl 9 Pumping pipe 10 Elbow pipe 11 Pump body 13 Motor 20 Horizontal input shaft 21 Vertical output shaft 27 Pump shaft penetrating portion 28 Installation seat 29 Power transmission unit 31 Upper casing 31a Top plate 31b Bottom Face plate 45, 46 Shaft insertion hole 49 Power transmission mechanism 52 Oil seal device 54 Water seal device 54a Tray part

Claims (3)

A pumping pipe and an elbow pipe are sequentially arranged on a discharge bowl that houses the impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft penetrates outward from the elbow pipe and is taken out so as to protrude upward. In the vertical shaft pump, which is installed by penetrating the pump body downwardly on the floor, and the pump shaft is driven by a prime mover, the pump shaft penetrating portion extends outward from the elbow tube in the upper part on the back side of the elbow tube. Only one installation seat is provided so that the required amount extends horizontally, and the pump shaft is connected to a motor installed on the same floor as the floor where the pump body is installed, and the rotational force from the horizontal input shaft side. a power transmission unit including a power transmission mechanism for so tell, in the installation seat, removably installed through the base provided on the lower plate of the upper casing with the power transmission unit Po Vertical shaft pump characterized by having a structure in which as assembled to flop body. The vertical transmission shaft is supported by being inserted into shaft insertion holes provided in the upper surface plate and the lower surface plate of the upper casing of the power transmission unit, and the oil sealing device is provided in the shaft insertion hole portion of the lower surface plate, and the elbow pipe It is equipped with a water seal device to the pump shaft penetrating portion of, vertical-shaft pump according to claim 1 wherein so as to confront the Aburafu device and water seal device up and down. The vertical shaft pump according to claim 2 , wherein a tray portion is formed on an upper surface portion of the water sealing device.

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