JP2004162554A - Elbow with transmission and vertical shaft pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elbow with a transmission for preventing intrusion of dirt-dust in a speed reducer casing 12 attached to a discharge elbow 10 vertically divided into two parts. <P>SOLUTION: The discharge elbow 10 having a rotary shaft 22 penetrating and projecting in the vertical direction through an outer wall is vertically divided into two parts; the whole speed reducer casing 12 is integrally attached to an elbow upper side part 10a; a speed reduction mechanism is installed in the casing by driving and connecting a vertical directional cylindrical shaft 20; and a lubricating oil case 14 is integrally attached to an elbow lower side part 10b by including an outer wall in a part. The elbow upper side part 10a is lifted down to the elbow lower side part 10b; the rotary shaft 22 is inserted into and connected to a cylindrical shaft 22 by penetrating through the outer wall of the elbow upper side part 10a; and the elbow upper side part 10a is installed in and fixed to the elbow lower side part 10b. Lubricating oil is gathered in a bottom part of the speed reducer casing 12, and the lubricating oil flowing down to the bottom part is allowed to flow in the lubricating oil case 14 via a communicating tube 32. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD 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 using an elbow with a transmission that is easy to install with a speed change mechanism as a speed change mechanism.
[0002]
[Prior art]
The inventors have already proposed, in JP-A-2001-263284, an elbow with a transmission that is easy to install. The technique proposed above is to reduce the weight of each member by dividing the elbow into upper and lower parts and also to divide the transmission casing attached to the elbow into upper and lower parts, so that the crane necessary for installing the parts is reduced. The capacity has been reduced, making installation easier.
[0003]
[Problems to be solved by the invention]
In the above-mentioned technology, the crane capacity was small and the installation work was easy as compared with the case where an integrated elbow was installed. However, when the upper elbow upper part and the lower elbow part which are divided into upper and lower parts are not assembled, the transmission casing is also divided into upper and lower parts, so that 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 assembly. In addition, the lubricating oil of the transmission mechanism accumulated at the bottom of the transmission casing may lead to an unexpected situation such as dust being mixed or spilled before assembly unless a cover is provided.
[0004]
The present invention has been made in order to further improve the above-mentioned technique as proposed above, and by integrally attaching the entire transmission casing to the upper and lower two-part elbow upper part, the elbow upper part and the elbow lower part are integrated. An object of the present invention is to provide an elbow with a transmission that prevents dust and the like from entering a transmission casing even before a side portion is assembled, and a vertical shaft pump using the elbow.
[0005]
[Means for Solving the Problems]
In order to achieve this object, an elbow with a transmission according to the present invention is configured such that an elbow whose rotation shaft projects vertically through an outer wall is divided into upper and lower parts, and the entire transmission casing is integrally attached to an upper part of the elbow, A transmission mechanism in which a vertical cylindrical shaft is drivingly connected is assembled in the transmission casing, and the elbow upper part is suspended from the elbow lower part, and the rotating shaft penetrates the outer wall of the elbow upper part. And an elbow upper part is assembled to and fixed to the elbow lower part.
[0006]
In addition, an elbow whose rotation shaft projects vertically through the outer wall is vertically divided into two parts, and the rotation shaft is vertically divided into two parts within the elbow, and the entire transmission casing is integrally attached to an upper part of the elbow, A transmission mechanism in which the rotation shaft upper portion is drivingly connected to the transmission device casing is assembled, the elbow upper portion is suspended from the elbow lower portion, and the rotation shaft upper portion and the rotation shaft lower portion are moved inside the elbow. And the elbow upper part may be assembled and fixed to the elbow lower part.
[0007]
Further, the transmission casing may be configured such that lubricating oil accumulates at the bottom thereof.
[0008]
Further, a lubricating oil case is integrally attached to the lower part of the elbow so as to partially include or closely contact the outer wall thereof, and the lubricating oil flowing down to the bottom of the transmission casing flows into the lubricating oil case. It can also be configured to do so.
[0009]
Furthermore, it is also possible to configure so that the bottom of the transmission casing communicates with the inside of the lubricating oil case via a communication pipe.
[0010]
The vertical shaft pump according to the present invention is constructed by assembling the elbow with a transmission according to any one of claims 1 to 5 as a discharge elbow, wherein the transmission mechanism is a reduction mechanism.
[0011]
BEST MODE FOR CARRYING OUT 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 the 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 upper and lower parts.
[0012]
First, a description will be given assuming that the elbow with a transmission according to the present invention is used as a discharge elbow of a vertical shaft pump, and the transmission mechanism is a reduction mechanism. The discharge elbow 10 of the present invention is divided into upper and lower parts by a horizontal division surface at substantially the center of the discharge passage which is substantially horizontal. Then, substantially the entirety of the reduction gear casing 12 as the transmission casing is integrally attached to the elbow upper portion 10a. The bottom of the reduction gear casing 12 is closed so that lubricating oil can accumulate at the bottom. Further, a lubricating oil case 14 including the outer wall of the discharge elbow 10 is integrally attached to the lower part 10b of the elbow. The lubricating oil case 14 is formed in a closed container shape capable of storing lubricating oil. Further, a flange for joining and fixing to each other is provided on a division surface of the elbow upper portion 10a and the elbow lower portion 10b, and a seal member 16 is provided on one of the flanges. It is formed to be fixed.
[0013]
A gear train including a cylindrical shaft 20 as an output stage to which the large spur gear 18 of the reduction mechanism is fixed is mounted in the reduction gear 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. The input shaft 24 protruding in the horizontal direction is rotatably supported on an input shaft casing 26 so as to be rotatable around the axis. 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 mesh with and be connected to the gear train of the reduction mechanism.
[0014]
In such a configuration, similarly to the conventional vertical shaft pump, a water pipe and the like are suspended from the floor, and the elbow lower part 10b is stacked and joined. Further, the elbow upper portion 10a is suspended from above with respect to the elbow lower portion 10b, and the rotating shaft 22 appropriately penetrates the outer wall of the elbow upper portion 10a in a water-tight manner and is inserted into the cylindrical shaft 20. Is done. Then, the cylindrical shaft 20 and the rotating shaft 22 are drivingly connected by the shaft couplings 30, 30. Further, the elbow upper part 10a is assembled to the elbow lower part 10b and joined and fixed. 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 and connected to the gear train of the reduction mechanism. Further, a portion where the lubricating oil is accumulated at the bottom of the reduction gear casing 12 and the lubricating oil case 14 are communicated by the communication pipe 32. The reduction gear casing 12 is provided with a lubrication pump 34 that is appropriately driven and connected to the reduction gear mechanism. The lubrication oil is sucked up by an oil suction pipe 36 communicating with the bottom of the lubrication oil case 14 and the reduction gear casing 12 The lubricating oil is appropriately poured into the internal speed reduction mechanism. Needless to say, the communication pipe 32, the oil absorption pipe 36, and the oil supply pipe 38 are connected after the elbow upper portion 10a is assembled and fixed to the elbow lower portion 10b.
[0015]
In the installation of the elbow with a reduction gear as described above, the discharge elbow 10 is divided into upper and lower parts, and the weight of each part is lighter than that of the integral elbow. Easy. Even before the elbow upper portion 10a is assembled, the reduction gear casing 12 is substantially closed by assembling the input shaft casing 26 or providing a temporary lid. Also, there is no possibility that dust or the like may enter the reduction gear casing 12 during preparation for installation. Also, the lubricating oil case 14 can be easily closed, and there is no intrusion of dust and the like. Therefore, there is no possibility that the gears and the bearings of the speed reduction mechanism are damaged by the intrusion of dust.
[0016]
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 an elbow with a transmission according to the present invention. 5, the same or equivalent members as those in FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description will be omitted.
[0017]
In the second embodiment shown in FIG. 5, the structure different from the first embodiment is as follows. First, the rotating shaft 22 is divided into upper and lower portions within an elbow, and the rotating shaft upper portion 22a is appropriately watertightly penetrated through the outer wall of the elbow upper portion 10a. Is fixed. Then, the elbow upper portion a is suspended from above with respect to the installed elbow lower portion 10b, and the rotary shaft upper portion 22a is drivingly connected to the rotary shaft lower portion 22b by the shaft coupling 40 in the elbow. The elbow upper part 10a is assembled and fixed to the elbow lower part 10b. In addition, connection of the rotating shaft upper portion 22a and the rotating shaft lower portion 22b by the shaft joint 40 is performed by inserting the shaft joint 40 into one of the rotating shaft upper portion 22a or the rotating shaft lower portion 22 and moving the position from the connection position. In a state in which the elbow upper portion 10a is suspended from above, the rotating shaft upper portion 22a is brought into contact with or close to the rotating shaft lower portion 22b, and the shaft coupling 40 is moved to the coupling position and driven. What is necessary is just to connect.
[0018]
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 rotation shaft upper portion 22a, and the speed reduction device casing 12, the weight of the cylinder shaft 20 can be reduced.
[0019]
In the description of the above embodiment, the elbow with the transmission is described as the elbow with the reduction gear used as the discharge elbow of the vertical shaft pump, but the transmission mechanism can be applied as the elbow with the speed increasing device as the speed increasing mechanism. Of course. Further, the transmission may be configured by a gear train capable of reversible operation so that the transmission can be operated by either the speed reduction mechanism or the speed increase mechanism. Therefore, if it is configured as a speed increasing mechanism, the rotating shaft 22 is drivingly connected to a water turbine rotated by flowing water as an input shaft, and the input shaft 24 in the above description is drivingly connected to a generator as an output shaft, and is connected to a generator. Can also be applied. The entire transmission casing may be substantially attached to the elbow upper portion 10a so that the inside can be easily closed.
[0020]
Further, in the above embodiment, the elbow is divided into 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 a horizontal direction separated from the center of the flow path, or may be divided by providing a stepped portion including two or more horizontal dividing surfaces, and further divided into elbow lower portions 10b. If the elbow upper portion 10a can be stably assembled and arranged, the divided surface may be a slope or a curved surface.
[0021]
The input shaft casing 26 may be previously assembled to the reduction gear casing 12 at a factory or the like, and the input shaft 24 may be appropriately assembled directly to the reduction gear casing 12 as a gear train component. . Further, the lubricating oil case 14 attached to the lower part 10b of the elbow includes more outer walls of the elbow so that the lubricating oil is 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 lower elbow portion 10b. The lubricating oil case 14 may be configured such that the lubricating oil accumulated inside is cooled by the fluid in the elbow, and may be configured to be in close contact with the elbow lower portion 10b with good heat conduction. Therefore, a flat tubular member may be wound around the lower part 10b of the elbow and used as the lubricating oil case 14. Further, in the above embodiment, the lubricating oil is stored in the lubricating oil case 14 and is cooled by the fluid in the elbow. However, the present invention is not limited to this. It is also possible to adopt a configuration in which cooling is performed by the provided cooler and the cooling gear is again poured into the gear train of the reduction mechanism.
[0022]
【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 special functions and effects can be obtained.
[0023]
In the elbow with a transmission according to the first or second aspect, since the elbow is divided into upper and lower parts, the weight of each member is reduced, and installation is easy. And, since the entire transmission casing to which the transmission mechanism is assembled is integrally attached to the upper part of the elbow, the transmission casing can be easily closed, and during the transportation before the upper part of the elbow is assembled to the lower part of the elbow. Also, there is no danger of dust entering the transmission casing during installation preparation. Therefore, the gears and bearings of the transmission mechanism do not suffer losses due to dust or the like.
[0024]
In the elbow with a transmission according to the third aspect, since lubricating oil is collected at the bottom of the transmission casing, dust is not mixed into the collected lubricating oil, and the gear train is appropriately re-lubricated. Can be.
[0025]
In the elbow with a transmission according to the fourth or fifth aspect, the lubricating oil flowing into the lubricating oil case attached to the lower portion of the elbow is cooled by the fluid in the elbow.
[0026]
In the vertical shaft pump according to the sixth aspect, the discharge elbow can be installed by 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. 1;
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 an elbow with a transmission according to the present invention.
[Explanation of symbols]
Reference Signs List 10 discharge elbow 10a elbow upper part 10b elbow lower part 12 reduction gear casing 14 lubricating oil case 16 sealing member 18 large spur gear 20 cylindrical shaft 22 rotation shaft 22a rotation shaft upper part 22b rotation shaft lower part 24 input shaft 26 input Shaft casing 28 Bevel gear 30, 40 Shaft coupling 32 Communication pipe 34 Oil pump 36 Oil suction pipe 38 Oil pipe

Claims (6)

An elbow whose rotation shaft projects vertically through the outer wall is divided into upper and lower parts, the entire transmission casing is integrally attached to the upper part of the elbow, and a vertical cylindrical shaft is drivingly connected to the inside of the transmission casing. A speed change mechanism is assembled, the elbow upper portion is suspended from the elbow lower portion, and the rotation shaft penetrates the outer wall of the elbow upper portion and is inserted and connected to the cylindrical shaft. An elbow with a transmission, wherein the elbow is mounted and fixed to the lower portion of the elbow. An elbow having a rotating shaft projecting vertically through an outer wall is vertically divided into two parts; the rotating shaft is vertically divided into two parts within the elbow; and the entire transmission casing is integrally attached to an upper part of the elbow, and the transmission is provided. A transmission mechanism in which the upper portion of the rotating shaft is driven and connected in the casing, the lower portion of the elbow is suspended from the lower portion of the elbow, and the upper portion of the rotating shaft and the lower portion of the rotating shaft are driven in the elbow. An elbow with a transmission, wherein the elbow is connected and the upper part of the elbow is assembled and fixed to the lower part of the elbow. The elbow with a transmission according to claim 1 or 2, wherein the transmission casing is configured such that lubricating oil is accumulated at a bottom portion thereof. 3. An elbow with a transmission according to claim 1, wherein a lubricating oil case is integrally attached to the lower part of the elbow so as to partially include or closely contact an outer wall of the elbow and flow down to the bottom of the transmission casing. An elbow with a transmission, wherein lubricating oil flows into the lubricating oil case. The elbow with a transmission according to claim 4, wherein a bottom portion of the transmission casing communicates with the lubricating oil case via a communication pipe. 6. A vertical shaft pump, wherein the speed change mechanism is a speed reduction mechanism, and the elbow with a transmission according to any one of claims 1 to 5 is assembled as a discharge elbow.

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