JPS58217828A - Variable speed hydraulic coupling - Google Patents

Abstract

PURPOSE:To dispose a hydraulic fluid feed pump at a spot proximate to a flow rate adjusting device as well as to aim at shortening the length of piping, etc., by attaching a timing gear to a sleeve situated at the side of an output shaft and solidly rotating together with an input shaft as one body. CONSTITUTION:An impeller 5 is solidly attached to the right inner end part of an input shaft 3. A sleeve 6 is stuck fast to the surface part of a counter-input side of the impeller and supported by a bearing 8 installed inside a body casing 1. A centrifugal pump 15 is rotatively driven by a timing gear 16 via an intermediate gear 17. The hydraulic fluid discharged out of a hydraulic pump 15 flows in a right side chamber of the impeller 5 by way of a fluid passage 6a made up between the sleeve 6 and an output shaft 9 and moreover fed to a left side chamber of the impeller 5 by way of a fluid passage 12a made up at the inside of a boss part of a runner 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid coupling, in particular, an input shaft and an output shaft are supported substantially horizontally in a main body casing, and a runner is rotatably disposed within an impeller attached to the input shaft. This invention relates to a horizontal variable speed fluid coupling in which a runner is attached to an output shaft and the rotation of the input shaft is transmitted to the output shaft while supplying working fluid into the impeller using a pump for supplying working fluid.

Conventionally, in the type of horizontal variable speed fluid coupling described above, the working fluid supply pump is rotationally driven by an input shaft, and a timing gear for driving the pump is attached to the input shaft. Ta.

However, in general, the inlet for supplying working fluid into the impeller is located on the opposite side of the output shaft, and the flow rate adjustment device is also located near the output shaft, so the timing gear is placed on the input shaft as described above. Installation If a working fluid supply pump is placed near this area, not only will the piping from the pump to the flow rate adjustment device on the opposite side become long, but it will also be necessary to place the piping near a rotating body such as an impeller that rotates at high speed. The pump for supplying the working fluid had to be housed in a part of the casing cover, and the timing gear had to be housed in the casing cover.
ii+',! %(: , 'h' This was done to eliminate the drawbacks of the fluid joint, and the timing adjustment is integrated into the sleeve that is located on the output shaft side and rotates integrally with the input shaft.
・In accordance with 1 and 2, the working fluid supply pump is placed near the flow rate adjustment device to shorten the piping, etc., and is combined into a compact 1. The working fluid from the 1-flow regulating device can be introduced into the impeller by forming a flow path open to the shaft, and the working fluid supply pump, timing gear, and flow regulating device can be connected to the input side rotation. The second object of the present invention is to provide a variable speed fluid coupling that can centrally attach the bearings necessary for supporting the body.

Invention 1, the input shaft and output shaft are approximately q in this casing.
A runner is mounted on the rotary white 1- in an impeller mounted on the human power shaft, and the runner is mounted on the output shaft and the working fluid is supplied from the pump for supplying working fluid. (I) A fluid that controls the rotation of the output shaft by adjusting the position of the free surface of the internal fluid of the impeller and runner from the axial center. In the joint: 1. A sleeve is placed on the side surface of the impeller opposite to the input side and supported by a bearing, and the output shaft is inserted into the sleeve to form a hydraulic oil flow path in the opening thereof. - A variable speed fluid coupling characterized in that a timing gear is attached to the sleeve to drive a working fluid supply pump.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a main body casing, and an input shaft 3 is supported by a bearing 2 at one end thereof. An impeller 5 is integrally attached to the right inner end of the input shaft 3 via a flange 4, and a sleeve 6 is fixed to the side surface of the impeller 5 opposite to the input. It is supported by a bearing 8 of a bearing body 7 provided inside the main body casing 1. Reference numeral 9 denotes an output shaft, which is supported by a bearing 10 on the other end side of the main body casing 1 and is supported by the sleeve 6.
Passing through the inside, its left inner end is supported by a 411j receiver 11 that is inserted into the Fuji 4.

12 is a runner which is attached to the output shaft 9 and can freely rotate within the impeller 5.

1. The F blade portion of the bearing trunk 7 is open, allowing the left and right oil tanks 13 and 14 to communicate with each other. Further, a centrifugal pump 15 for supplying working fluid is attached to the lower part of the bearing body 7. The centrifugal pump 15 includes: 1-a sleeve C that rotates integrally with the human power shaft 3 and the impeller 5;
- Rotationally driven by the raised timing gear 1 through the intermediate filtration 17. ]; sea urchin is turning, 1
Reference numeral 18 denotes a bearing bushing, to which the intermediate gear 17 is mounted biaxially on the seventh rotation, and is also fitted into the bearing body 7 shown at -.

As is clear from FIG. 2, a pipe 11j is attached to the discharge 11 of the centrifugal pump 15 shown in FIG.
The flow rate adjustment device n20 is provided with a flow It adjustment 9 (not shown), and the working flow discharged from the centrifugal pump IFi is 5 While adjusting the integral flow rate, the flow passes through the flow path 6a formed between the sleeve 6 and the output shaft 9, flows into the right chamber of the impeller 5, and further flows through the flow path formed inside the boss portion of the runner 12. It is supplied into the left side chamber of the impeller 5 through the passage 12a.

22 is a Wesco pump for detecting the rotation speed of the output shaft 9, and its discharge pressure is introduced into the flow rate adjustment device 20 to control the flow rate adjustment valve in order to quickly stabilize the rotation speed. ing.

Reference numeral 28 denotes a pressure detection device which detects the pressure of the discharged fluid due to changes in the operating state of the entire system including an appropriate driven machine (not shown) such as a pump or blower driven by the output shaft 9, and detects the pressure of the discharged fluid. The flow control valve of the flow control device 20 is controlled via the flow control valve 27.

A cooling pipe 4 is provided in the oil tank 13 at the bottom of the main casing 1.
0 is placed.

Next, the operation of the above embodiment will be explained.

=6- The above input shaft 3 is driven by an appropriate prime mover (not shown) such as an electric motor.
1 and rotates the impeller 5.
This and the externally rotating timing gear 16 have [:
Then, the centrifugal pump 15 is operated via the intermediate south center 17. When the centrifugal pump 15 begins to rotate, the working fluid discharged thereby flows through the piping 19! ! t flows into the IAI node device 20. Flowing when you start driving! it MA
Since the I section valve 1 is open 11, the working fluid that has entered the flow rate regulator 2 flows into the impeller 5, and the working fluid that has entered the impeller 5 flows into the impeller 5 and the tool.
<L, rotate the inner runner 12, and
The output shaft 9, which has become a body, is rotated.

When the discharge fluid pressure of the driven machine becomes low due to a change in the operating status of the entire system including the driven machine, the pressure detection device 23 (i) is activated, the ζ rod 27 is pushed down, and the lever 2 (i or left 1) is activated. Then, lower the spool 21 and operate the control valve to allow the working fluid to flow into the impeller 5.
ffi+ is decreased and the rotational speed of the output shaft 9 is lowered by 1.1, the discharge pressure of the Wesco pump 22 decreases, and the lever 26 is returned to almost horizontal in order to quickly stabilize the rotational speed. The spool 21 is raised to reduce the rotational speed of the output shaft 9 again, and the discharge fluid pressure of the driven machine is returned to the set value.

Since the present invention is configured as follows, the working fluid supply pump is disposed near the flow rate adjustment device, and the connecting piping is short and old, so there is no risk of damage from hitting a rotating body such as an impeller. This has the effect of being able to be organized compactly as a whole.

[Brief explanation of the drawing]

□ FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the variable speed fluid coupling of the present invention, and FIG. 2 is a cross-sectional view taken along the line 1--1 in FIG. 1. 1...Body casing 2...Bearing 3...Input shaft 4...7 Lange 5...Impeller 6.
...Sleeve 6a...Flow path 7...Bearing body 8...Bearing 9...Output shaft 10.11...
・Bearing 12...Runner 8- 12a...Flow path 13.14...Oil tank 15・
...Centrifugal pump 1...Timing gear 1°7...
・Middle South Central 1) 3...Bearing bushing 1! ]...
・Piping 2+1. ...Flow m adjustment device 2()u...
・Inflow chamber 22...Wesco pump 27...Rod 2) (...Pressure detection device 40...Cooling pipe special Nl, Applicant: Patent attorney representing Ebara Corporation, 111 5 - 1,000 days) 1 mil 9-

Claims (1)

[Claims] 1. An input shaft and an output shaft are supported approximately horizontally in the main body casing, and a runner is rotatably disposed within an impeller attached to the input shaft, and the runner is attached to the output shaft, and the flow from the working fluid supply pump is In a fluid coupling that controls the rotation of the output shaft by adjusting the position of the free surface of the internal fluid of the impeller and runner from the axis center while adjusting the supply amount of the working fluid using a flow rate adjustment device; A sleeve is attached to the side surface and supported by a bearing, and the output shaft is inserted into the sleeve to form a hydraulic fluid flow path at its opening, and a timing gear is attached to the sleeve for supplying the hydraulic fluid. A variable speed fluid coupling characterized by driving a pump.