JP4060166B2 - Elbow with transmission and vertical pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elbow with a transmission that is easy to install. The present invention also relates to a vertical shaft pump that uses an elbow with a transmission that is easily installed with a speed reduction mechanism as a speed reduction mechanism.
[0002]
[Prior art]
The inventors have already proposed an elbow with a transmission that is easy to install according to Japanese Patent Laid-Open No. 2001-263284. The previously proposed technique is that the elbow is divided into upper and lower parts, and the transmission casing attached to the elbow is also divided into upper and lower parts, thereby reducing the weight of each member, and the crane necessary to install it. The capacity has been reduced to facilitate installation.
[0003]
[Problems to be solved by the invention]
In the above-described technique, the crane capacity is small and the installation work is easy as compared with the case of installing the integrated elbow. However, when the elbow upper part and the elbow lower part divided into the upper and lower parts are in a state before assembly, the transmission casing is also divided into the upper and lower parts, and dust and the like easily enter the transmission casing. After assembly, the gears and bearings of the transmission mechanism may be damaged by dust that has entered before the assembly. Further, the lubricating oil of the transmission mechanism accumulated at the bottom of the transmission casing may cause an unexpected situation such as dust mixing or spilling before assembly unless a cover is provided.
[0004]
The present invention has been made in order to further improve the previously proposed technique. The entire upper part of the transmission casing and the lower part of the elbow are integrally attached to the upper part of the elbow divided into two parts. An object of the present invention is to provide an elbow with a transmission and a vertical shaft pump using the elbow so that dust or the like does not enter the transmission casing even before the side portion is assembled.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, the elbow with a transmission of the present invention has an elbow whose rotating shaft projects vertically through the outer wall in two parts, and the entire transmission casing is integrally attached to the upper part of the elbow. A transmission mechanism in which a vertical cylindrical shaft is drivingly connected is assembled in the transmission casing, the elbow upper portion is assembled and fixed to the elbow lower portion, and the rotating shaft that penetrates the outer wall of the elbow upper portion Is inserted and connected to the cylindrical shaft, and a lubricating oil case is integrally attached to the lower part of the elbow so as to include or closely contact the outer wall thereof, and the lubricating oil flowing down to the bottom of the transmission casing is obtained. It is configured to flow into the lubricating oil case .
[0006]
In addition, the elbow whose rotating shaft projects vertically through the outer wall is divided into two parts, and the rotating shaft is divided into two parts in the elbow, and the entire transmission casing is integrally attached to the upper part of the elbow, A transmission mechanism in which the rotating shaft upper portion is drivingly connected is assembled in the transmission casing, and the elbow upper portion is assembled and fixed to the elbow lower portion, and the rotating shaft upper portion and the rotating shaft lower portion are mounted in the elbow. The lubricating oil case is integrally attached to the lower part of the elbow so that the outer wall is partly or closely attached to the lower part of the elbow, and the lubricating oil flowing down to the bottom of the transmission casing is contained in the lubricating oil case. You may comprise so that it may flow in .
[0007]
And the bottom part of the said transmission casing can also be comprised so that it may connect in the said lubricating oil case via a communicating pipe .
[0008]
The vertical shaft pump according to the present invention is constructed by assembling the elbow with a transmission device according to any one of claims 1 and 3 as a discharge elbow.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a first embodiment of an elbow with a transmission according to the present invention. FIG. 2 is a view taken in the direction of arrow A in FIG. FIG. 3 is a plan view of FIG. FIG. 4 is an exploded perspective view of an elbow upper part and an elbow lower part obtained by dividing the elbow into two parts.
[0010]
First, it is assumed that the elbow with a transmission of the present invention is used as a discharge elbow of a vertical shaft pump, and the speed change mechanism is a speed reduction mechanism. The discharge elbow 10 of the present invention is divided into upper and lower parts by a horizontal dividing surface at substantially the center of the discharge flow path which is substantially horizontal. Then, substantially the entire reduction gear casing 12 as a transmission casing is integrally attached to the elbow upper portion 10a. The speed reducer casing 12 is closed at the bottom so that lubricating oil can accumulate at the bottom. A lubricating oil case 14 is integrally attached to the elbow lower portion 10 b including the outer wall of the discharge elbow 10. The lubricating oil case 14 is formed in a closed container shape that can accommodate the lubricating oil. Further, the split surfaces of the elbow upper portion 10a and the elbow lower portion 10b are provided with flanges for joining and fixing to each other, and a seal member 16 is provided on one of the flanges, and the split surfaces are joined in a watertight manner by assembly. It is formed to be fixed.
[0011]
A gear train including a cylindrical shaft 20 as an output stage to which a large spur gear 18 of a speed reduction mechanism is fixed is assembled in the speed reduction device casing 12. In addition, it is comprised so that the rotating shaft 22 of a vertical shaft pump can be inserted and connected in the cylindrical shaft 20. FIG. Further, the input shaft 24 protruding in the horizontal direction is supported by the input shaft casing 26 so as to be rotatable about the shaft, and a bevel gear 28 is fixed to the tip of the input shaft 24. The input shaft casing 26 is assembled and fixed to the reduction gear casing 12 from the outside in the horizontal direction, and the bevel gear 28 is configured to be meshed with the gear train of the reduction mechanism.
[0012]
In such a configuration, similarly to a conventional vertical shaft pump, a pumping pipe or the like is suspended from the floor, and the elbow lower portion 10b is stacked and joined. Further, the elbow upper portion 10a is hung from above the elbow lower portion 10b, and the rotating shaft 22 makes the outer wall of the elbow upper portion 10a appropriately pass through the outer wall and is inserted into the cylindrical shaft 20. Is done. The cylindrical shaft 20 and the rotary shaft 22 are drivingly connected by shaft couplings 30 and 30. Further, the elbow upper portion 10a is assembled and fixed to the elbow lower portion 10b. Further, the input shaft casing 26 is assembled and fixed to the reduction gear casing 12 from the outside, and the bevel gear 28 is meshed with the gear train of the reduction mechanism. Further, the location where the lubricating oil is accumulated at the bottom of the speed reducer casing 12 and the lubricating oil case 14 are communicated with each other through the communication pipe 32. The speed reduction device casing 12 is provided with an oil supply pump 34 that is appropriately driven and connected to the speed reduction mechanism. The oil supply pipe 36 communicates with the bottom of the lubricating oil case 14 and sucks up the lubricating oil by the oil supply pipe 38. The lubricating oil is appropriately poured into the internal speed reduction mechanism. Of course, the communication pipe 32, the oil absorption pipe 36, and the oil supply pipe 38 are piped after the elbow upper portion 10a is assembled and fixed to the elbow lower portion 10b.
[0013]
In the installation of the elbow with a speed reducer as described above, the discharge elbow 10 is divided into upper and lower parts, the weight of each part becomes lighter than that of the integral elbow, and the crane capacity is small and the work is sufficient. Easy. Even in the state before the elbow upper portion 10a is assembled, the speed reducer casing 12 is in a substantially closed state by assembling the input shaft casing 26 or providing a temporary lid, and is being transported. And during installation preparation, there is no possibility that dust or the like enters the reduction gear casing 12. Further, the lubricating oil case 14 can be easily closed, and dust and the like do not enter. Therefore, there is no possibility that the gear and the bearing of the speed reduction mechanism are damaged due to the intrusion of dust.
[0014]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of a second embodiment of the elbow with a transmission of the present invention. In FIG. 5, the same or equivalent members as those in FIGS.
[0015]
In the second embodiment shown in FIG. 5, the structure different from the first embodiment is as follows. First, the rotary shaft 22 is vertically divided into two in the elbow, and the rotary shaft upper portion 22a is appropriately watertightly projected through the outer wall of the elbow upper portion 10a. Is fixed. Then, the elbow upper portion a is suspended from above the installed elbow lower portion 10b, and the rotary shaft upper portion 22a is drivably coupled to the rotary shaft lower portion 22b by the shaft coupling 40 within the elbow. Further, the elbow upper portion 10a is assembled and fixed to the elbow lower portion 10b. The rotation shaft upper portion 22a and the rotation shaft lower portion 22b are connected by the shaft joint 40 by inserting the shaft coupling 40 into one of the rotation shaft upper portion 22a or the rotation shaft lower portion 22 and setting the position from the connection position. The elbow upper portion 10a is suspended from above, and the shaft coupling 40 is moved and driven to the connecting position in a state where the rotation shaft upper portion 22a is in contact with or close to the rotation shaft lower portion 22b. What is necessary is just to connect.
[0016]
Even in the second embodiment having such a mechanism, the same effect as in the first embodiment can be obtained. In the second embodiment, the cylindrical shaft 20 in the first embodiment is omitted, and the large spur gear 18 as the output stage of the gear train of the speed reduction mechanism is directly fixed to the rotary shaft upper portion 22a to reduce the speed reducer casing. 12, the weight of the cylinder shaft 20 can be reduced.
[0017]
In the description of the above embodiment, the elbow with a speed change device is described as an elbow with a speed reduction device that is used as a discharge elbow of a vertical shaft pump. However, the speed change mechanism can be applied as an elbow with a speed increase device. Of course. Moreover, you may comprise so that it can drive | operate with either a speed-reduction mechanism or a speed-up mechanism by comprising a transmission with the gear train which can be reversibly operated. Therefore, if it is configured as a speed increasing mechanism, the rotating shaft 22 is drivingly connected to a water turbine rotated by running water as an input shaft, and the input shaft 24 in the above description is drivingly connected to a generator as an output shaft. Can also be applied. And the transmission casing should just be substantially attached to the elbow upper part 10a so that the inside can be obstruct | occluded easily.
[0018]
Further, in the above embodiment, the elbow is divided into the upper and lower parts at substantially the center of the horizontal flow path. However, the present invention is not limited to this. The dividing surface may be in the horizontal direction away from the center of the flow path, or may be divided by providing a step portion including two or more horizontal dividing surfaces, and further on the elbow lower portion 10b. If the elbow upper portion 10a can be stably assembled and disposed, the divided surface may be a slope or a curved surface.
[0019]
The input shaft casing 26 may be assembled in advance to the reduction gear casing 12 at a factory or the like, and the input shaft 24 may be directly and appropriately assembled to the reduction gear casing 12 as a component of a gear train. . Further, the lubricating oil case 14 attached to the elbow lower portion 10b includes the outer wall of the elbow so as to be more effectively cooled by the fluid in the elbow. Therefore, the lubricating oil case 14 may be configured to surround the entire periphery of the elbow lower portion 10b. And the lubricating oil case 14 should just be cooled by the fluid in an elbow, and the lubricating oil collected inside may be comprised closely_contact | adhered to the elbow lower part 10b in the state with favorable heat conduction. Therefore, a flat tubular member may be wound around the elbow lower portion 10b to act as the lubricating oil case 14. Further, in the above embodiment, the lubricating oil is stored in the lubricating oil case 14 and cooled by the fluid in the elbow. However, the present invention is not limited to this, and the lubricating oil stored at the bottom of the speed reducer casing 12 is appropriately used. You may comprise so that it may cool with the provided cooler and may be poured into the gear train of a reduction mechanism again.
[0020]
【The invention's effect】
As described above, since the elbow with transmission and the vertical shaft pump of the present invention are configured, the following advantageous effects are obtained.
[0021]
In the elbow with a transmission according to any one of claims 1 to 3 , since the elbow is divided into upper and lower parts, the weight of each member is reduced and installation is easy. Since the entire transmission casing to which the transmission mechanism is assembled is integrally attached to the elbow upper portion, the transmission casing can be easily closed, and the elbow upper portion is being transported before being assembled to the elbow lower portion. And during installation preparation, there is no risk of dust entering the transmission casing. Therefore, the gears and bearings of the speed change mechanism are not damaged by dust or the like. Moreover, the lubricating oil that has flowed into the lubricating oil case attached to the lower portion of the elbow is cooled by the fluid in the elbow.
[0022]
In the vertical shaft pump according to the fourth aspect, the discharge elbow can be installed with a crane having a small capacity.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first embodiment of an elbow with a transmission according to the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a plan view of FIG. 1;
FIG. 4 is an exploded perspective view of an elbow upper part and an elbow lower part obtained by dividing the elbow into upper and lower parts.
FIG. 5 is a longitudinal sectional view of a second embodiment of the elbow with a transmission according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Discharge elbow 10a Elbow upper part 10b Elbow lower part 12 Reduction gear casing 14 Lubricating oil case 16 Seal member 18 Large spur gear 20 Cylindrical shaft 22 Rotating shaft 22a Rotating shaft upper part 22b Rotating shaft lower part 24 Input shaft 26 Input Shaft casing 28 Bevel gear 30, 40 Shaft coupling 32 Communication pipe 34 Lubrication pump 36 Oil absorption pipe 38 Lubrication pipe

Claims (4)

An elbow whose rotation shaft projects vertically through the outer wall is divided into two parts, the entire transmission casing is integrally attached to the upper part of the elbow, and a vertical cylindrical shaft is drivingly connected in the transmission casing. A transmission mechanism is assembled, the elbow upper portion is assembled and fixed to the elbow lower portion, the rotating shaft that penetrates the outer wall of the elbow upper portion is inserted and connected to the cylindrical shaft, and the elbow lower portion is connected to the elbow lower portion. A lubricating oil case is integrally provided with a part of the outer wall included or in close contact, and the lubricating oil flowing down to the bottom of the transmission casing is configured to flow into the lubricating oil case. Elbow with transmission. The elbow whose rotary shaft penetrates the outer wall in the vertical direction is divided into upper and lower parts, the rotary shaft is divided into upper and lower parts in the elbow, and the entire transmission casing is integrally attached to the upper part of the elbow. A speed change mechanism in which the upper part of the rotary shaft is drive-coupled in the casing is assembled, the upper part of the elbow is assembled and fixed to the lower part of the elbow, and the upper part of the rotary shaft and the lower part of the rotary shaft are driven in the elbow. The lubricating oil case is integrally attached to the lower part of the elbow so that the outer wall is partly or closely attached to the lower part of the elbow, and the lubricating oil that has flowed down to the bottom of the transmission casing flows into the lubricating oil case. An elbow with a transmission, characterized in that it is configured. 3. The elbow with a transmission according to claim 1 or 2, wherein a bottom portion of the transmission casing is communicated with the inside of the lubricating oil case through a communication pipe . A vertical shaft pump comprising: the elbow with a transmission according to claim 1 or 3 as a discharge elbow, wherein the transmission mechanism is a speed reduction mechanism.

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