JPH06173839A - Variable pitch propeller drive device - Google Patents

Abstract

PURPOSE:To efficiently perform lubrication for respective bearings disposed at an upper part of a case formed at the top part of a rotating main shaft without oil replenishing from the outside. CONSTITUTION:A variable pitch propeller drive changes the installation angle of a variable pitch blade installed on a rotating main shaft by relatively-rotating an output shaft 7 disposed coaxially with the rotating main shaft. An oiling disk 32 provided with a lubricating oil supply hole 34 whose base end is communicated with an upper bearing 16a of the case and a bearing 19 of the input shaft 7 of a gear transmission device and whose top end is equipped with a lubricating oil suction port 35 and which extends in a radial direction is fixed, so that it may be soaked into lubricating oil 31 charged in the case 15, to a fixed shaft 16 in which the gear transmission device connected with the output shaft 7 is stored and which is disposed in the case 15 fixed to the rotating main shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for changing a mounting angle of blades with respect to a rotating main shaft of a variable pitch propeller in a hydraulic machine or the like.

[0002]

2. Description of the Related Art Generally, in a water turbine, a pump, a blower or the like, a pitch propeller which can arbitrarily change a mounting angle of a blade with respect to a rotating shaft is used, and its load is adjusted by changing a mounting angle of the blade. There are things that can be done.

That is, a runner boss having a plurality of blades mounted radially is integrally connected to one end of the rotary main shaft, and the support shafts of the respective blades are rotatably supported around the axis line in the runner boss. There is. On the other hand, a hydraulic cylinder is formed in a part of the hollow rotating main shaft, and one end of an operating rod concentrically inserted into the hollow rotating main shaft is inserted into a piston arranged in the hydraulic cylinder. The other end is connected to the support shaft of each blade via a link mechanism.

Then, pressure oil is supplied to the hydraulic cylinder from the end of the rotary main shaft through a pressure distribution valve, and the piston is moved in an arbitrary direction, thereby moving the operating rod in the axial direction and moving the operation rod. Thus, each support shaft of the blade is rotated around the axis to change the mounting angle of each blade.

However, in such a device, in order to be able to adjust the mounting angle of the blade even during the drive rotation of the rotary spindle, the supply and discharge of the hydraulic pressure to and from the hydraulic cylinder is performed via a rotary seal mechanism or the like. Therefore, there is a problem that the hydraulic sealing mechanism becomes complicated.

Therefore, an electric motor is used instead of the hydraulic cylinder, and the operation rod for changing the mounting angle of each blade is driven by utilizing the difference in relative rotational speed between the output shaft and the rotary main shaft of the electric motor. Is also proposed.

[0007]

In the device for changing the mounting angle of each blade using the above-mentioned electric motor, the rotation of the electric motor shaft is transmitted to the output shaft through the gear transmission device. The device is housed in a case fixed to the rotating main shaft, and is lubricated by the lubricating oil filled in the case. However, the input shaft that transmits rotation to the gear transmission or the output shaft that extracts rotation from the gear transmission is supported by the bearings at the upper and lower ends of the case, and the bearings at the lower end are always in lubricating oil and lubricated. However, the upper bearing is located in the atmosphere and needs to be lubricated separately.

However, in such a case, since the case rotates integrally with the rotating main shaft, if an attempt is made to supply lubricating oil from the outside to the input shaft or the upper bearing portion of the case, the lubricating mechanism becomes complicated, and Problems such as oil leaks may occur, and the effect of using the electric motor is reduced.

In view of the above-mentioned problems, the present invention has a variable pitch propeller drive that can effectively lubricate each bearing disposed in the upper portion of the case without relying on oil supply from the outside. The purpose is to obtain the device.

[0010]

SUMMARY OF THE INVENTION According to the present invention, an attachment angle of a variable pitch blade attached to a rotary main shaft is changed by relatively rotating an output shaft concentric with the rotary main shaft. In the variable pitch propeller drive device, the gear transmission connected to the output shaft is housed, and the base end portion is the upper part of the case with respect to the fixed shaft arranged in the case fixed to the rotating main shaft. Lubrication in which the case is filled with an oil supply disc that is in communication with the bearing and the bearing of the input shaft of the gear transmission and has a lubricating oil supply hole that extends in the radial direction and has a lubricating oil suction port formed at the tip. It is characterized in that it is fixed so as to be immersed in oil.

[0011]

With the rotation of the case together with the rotating main shaft, the lubricating oil in the case is swirled together with the case due to its viscosity. Therefore, the pressure of the outer peripheral portion of the lubricating oil becomes higher than that of the inner peripheral portion due to the centrifugal action.

Therefore, the lubricating oil that swivels with respect to the oil supply disk fixed to the fixed shaft arranged in the case is
The oil is automatically taken in through a lubricating oil suction port formed at the end of the oil supply disk and is supplied to the upper bearing portion through the lubricating oil supply hole to lubricate and cool that portion.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 3 is a diagram showing a schematic structure of a variable pitch propeller turbine to which the device of the present invention is applied. A rotary main shaft 1 integrally attached with a runner boss 1a at its lower end is rotatably supported by a bearing 2. ing.

A plurality of blades 3 are attached to the runner boss 1a in the radial direction, and the support shafts 3a of the respective blades are rotatably supported in the runner boss 1a. It can be changed.

On the other hand, the rotating main shaft 1 is formed in a hollow shape, and an operating rod 4 is concentrically arranged in the rotating main shaft 1 so as to be movable only in the axial direction, and an arm fixed to the lower end of the operating rod 4. 4a is connected to each support shaft 3a of the blade 3 via a link and lever mechanism 5. Therefore, by reciprocally moving the operation rod 4 in the axial direction, the attachment angle of each blade 3 can be changed via the link and lever mechanism 5.

An operating mechanism 6 of the variable pitch propeller drive device according to the present invention is fixed to the top end of the rotary main shaft 1, and an input shaft 7 to the operating mechanism 6 is coupled with a coupling 8.
And, it is connected to the electric motor 10 via the intermediate shaft 9. The output shaft 11 at the other end of the differential mechanism 6 is designed to support a large thrust by a thrust bearing 12, and a screw portion 11a formed at the lower end of the output shaft 11 is screwed onto the top portion 4b of the operation rod 4. Has been done.

Therefore, when relative rotation is generated between the rotary main shaft 1 and the output shaft 11, the operating rod 4 moves in the axial direction, and the mounting angle of each blade 3 is changed via the link and lever mechanism 5. Be changed. Further, since the rotary main shaft 1 and the output shaft 11 rotate integrally, the operation rod 4 does not move in the axial direction, and the mounting angle of each blade 3 is maintained at a predetermined value.

FIG. 1 is a sectional view showing an embodiment of the differential mechanism 6, in which a case 15 of the differential mechanism 6 is integrally mounted on the top of the rotary spindle 1. Case 1 above
A fixed shaft 16 is inserted through a top wall of the casing 5, and the case 15 is rotatable around the fixed shaft 16 by a bearing 16a.
The rotary movement of the fixed shaft 16 is restricted by an arm 17 and a stopper 18 as shown in FIG.

By the way, the input shaft 7 is concentrically inserted through the fixed shaft 16 and is provided at the top end of the bearing 19 provided between the fixed shaft 16 and the input shaft 7 and the output shaft 11. It is rotatably supported by the shaft supporting portion 20. A sun gear 21 is integrally formed under the input shaft 7, and a plurality of planet gears 22 that revolve around the sun gear 21 are meshed with the sun gear 21. The planet gear 22 is an arm 11 formed integrally with the output shaft 11.
It is rotatably attached to a support shaft 23 provided in b, and revolves around the sun gear 21 while rotating on its own axis.
The output shaft 11 is rotated by the revolution.

An internal gear 24 is provided on the outer periphery of the planetary gear 22.
And the first gear 24 of the internal gear 24 of the
a is meshed with the planetary gear 22. The output shaft 11 is arranged on the same axis as the input shaft 7, and the case 1
5 is rotatably supported by bearings 25a and 25b so as to be able to rotate relative to the case 15 while penetrating through the bottom wall of the casing 5.

On the other hand, the bearing 16a inserted in the case 15
A second sun gear 26 having the same diameter as that of the first sun gear 21 is integrally formed at the lower end of the fixed shaft 16 that pivotally supports the case 15. A plurality of planetary gears 22 that revolve around the sun gear 26 are meshed with a planetary gear 27 having the same diameter as the planetary gears 27. The planetary gear 27 has an internal gear 24 provided on the outer periphery thereof.
Second gear 24b is meshed. Further, the planetary gear 27 has an arm 28 fixed to the inner wall of the case 15.
It is rotatably mounted on a shaft 29 protruding from.

Further, packings 30a, 30b and 30c are provided between the case 15 and the fixed shaft 16 and the output shaft 11, and between the fixed shaft 16 and the input shaft 7, respectively.
A lubricant 31 is filled in the case 15.

By the way, the fixed shaft 16 has a lubricating oil 3
A refueling disk 32 is mounted at a position where it is dipped in 1. As shown in FIG. 2, the refueling disk 32 is divided into two parts at the center thereof, and is mounted so as to be disassembled and attachable from the left and right of the fixed shaft 16 with bolts 33.

A lubricating oil supply hole 34 extending in the radial direction is formed in the oil supply disk 32, and a lubricating oil suction port 35 opening in a direction opposite to a swirling flow of the lubricating oil, which will be described later, is formed at a tip end portion thereof. The base end portion of the lubricating oil supply hole 34 formed is communicated with the bearing 19 through a communication hole 36 formed in the fixed shaft 16 and an annular gap 37 between the fixed shaft 16 and the input shaft 7. Further, the bearing 16 a is communicated with the bearing 16 a via a communication passage 38.

Therefore, when the electric motor 10 is in the non-driving state and the input shaft 7 stops rotating while the rotating main shaft 1 is rotating, the planetary gears 22 and 27 rotate about the sun gears 21 and 26, respectively. While revolving, planetary gear 2
The output shaft 11 is rotated by the revolution of 2. Therefore, the output shaft 11 makes the same rotation as the case, that is, the rotary main shaft 1, the operation rod 4 does not move in the axial direction, and the blade mounting angle is not changed.

Therefore, when the input shaft 7 is rotated via the electric motor 10, the sun gear 21 is rotated and the revolution force of the planetary gear 22 is added thereto, so that the rotating main shaft 1 and the output shaft 1 are rotated.
1, relative rotation occurs, the operation rod 4 is moved in the axial direction, and the blade mounting angle is changed.

By the way, when the rotary spindle 1 rotates, the case 15 rotates together with the rotary spindle 1, and the case 1 rotates.
Lubricant oil 31 filled in 5 swirls in the same direction as case 15 due to its viscosity. Then, due to the centrifugal action due to this turning, the pressure of the lubricating oil on the outer peripheral portion becomes higher than that on the inner peripheral portion.

Since the lubricating oil 31 in the case 15 swirls in this manner, the lubricating oil flows into the lubricating oil supply hole 34 from the lubricating oil intake port 35 of the fixed oil supply disc 32 mounted on the fixed shaft 16. Then, it flows into the bearing 19 through the communication hole 36 and the annular gap 37, and the bearing 19 is cooled and lubricated. Further, a part of the lubricating oil supplied to the bearing 19 is further supplied to the bearing 16a portion through the communication passage 38, and the bearing 16a is cooled and lubricated. And
The lubricating oil that lubricates the bearing 16a drops downward and is returned to the case 15.

That is, the pressure of the lubricating oil in the case 15 increases due to the centrifugal force due to the swirling, so that the pressure becomes higher toward the outer peripheral side, and since the lubricating oil having a higher pressure is introduced into the lubricating oil supply hole 34, It can be sufficiently supplied to the bearing portion located.

[0031]

As described above, according to the present invention, since the lubricating oil can be supplied to the bearing on the upper part of the case by the oil supply disk provided inside the case, it is not necessary to supply the lubricating oil from the outside of the case, The structure can be extremely simple, and since the viscosity of the lubricating oil is used to pump up, there is no mechanical drive part, maintenance-free is possible, and seizure of the upper bearing part etc. does not occur. There is an effect that it can be surely prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an operating mechanism of a variable pitch propeller drive device of the present invention.

FIG. 2 is a plan sectional view of a refueling disc.

FIG. 3 is a schematic configuration diagram of a variable pitch propeller turbine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating main shaft 3 blades 4 operating rod 6 operating mechanism 7 input shaft 10 electric motor 11 output shaft 15 case 16a, 19 bearing 32 lubricating oil disc 34 lubricating oil supply hole 35 lubricating oil suction port 36 communicating hole 37 annular gap 38 communicating passage

Claims (1)

[Claims] 1. A variable pitch propeller drive device in which an attachment angle of a variable pitch blade attached to a rotary main shaft is changed by relatively rotating an output shaft concentric with the rotary main shaft. , A gear transmission connected to the output shaft is housed, and a base end portion of a fixed shaft arranged in a case fixed to a rotating main shaft has a base end portion of the upper bearing portion of the case and the gear transmission. An oil supply disc that has a lubricating oil supply hole that extends in the radial direction and that communicates with the bearing of the input shaft and that has a lubricating oil intake port formed at the tip is fixed so that it is immersed in the lubricating oil filled in the case. A variable pitch propeller drive device characterized in that