JPS6344975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly applicable to compressors, pumps, turbines, generators, etc., or other auxiliary parts of a prime mover, in which the rotational speed on the drive rotating shaft side (input side) changes and the speed on the sealed case side (input side) changes. This invention relates to a fluid coupling device that maintains a constant rotational speed on the output side even though the load on the output side is constantly changing.

The conventional control adjustment mechanism described above has been constructed by a combination of an electric motor and a generator, or a combination of an oil motor and an oil pump. Therefore, such a combination makes the entire device complicated and cannot be made compact, and at the same time not only increases the weight, but also limits the installation space, and on the other hand, has problems such as high manufacturing costs. It was hot.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fluid coupling device that extremely effectively solves the problems of the prior art described above. an outer circumferential surface opposite to the inner circumferential surface of the sealed case that maintains a small gap for torque transmission between the shaft portion inside the case and the inner wall surface of the case, and where oil collects during rotation. One or more drive disks are provided with a weir in a part thereof and a return hole penetrating the inside in the radial direction near the weir and at the front part in the rotational direction. At one end of each of the discharge passage and supply passage provided in The other end of the supply passage is connected to an external oil suction pump and an oil supply pump, and each flow passage is equipped with a valve, the discharge passage is connected to the oil suction pump, and the supply passage is connected to the oil supply pump. The amount of oil in the torque transmission chamber is increased or decreased by a control function accompanying the opening/closing operation of the valve by an adjustment device connected to a speed sensor that communicates with the flow passage side of the valve and detects the output rotational speed of the sealed case side. This is characterized in that the output rotational speed on the sealed case side is controlled and held constant.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. A drive rotating shaft 1 is provided between a shaft portion inside a sealed case 2 supported on the shaft and an inner wall surface of the case. A weir 4 is provided on a part of the outer peripheral surface opposite to the inner peripheral surface of the sealed case 2 which maintains a minute gap 5 for torque transmission and collects oil during rotation, and a weir 4 is provided near the weir in the direction of rotation. One or more drive disks 3 having a return hole 6 passing through the inside in the radial direction are fixed to the front part of the rotary shaft body 1, and a discharge passage 7 and an inlet passage provided inside the rotary shaft body 1 in the axial direction are fixed thereto. A return hole 6 is provided at one end of each of the discharge passage 7 and the supply passage 8 of the rotary shaft body 1 on the discharge passage 7 side.
Further, the micro-gaps 5 are internally arranged in such a position that they are in communication with the supply passage 8, respectively.
On the other hand, V ₁ and V ₂ are valves provided in respective flow passages 9 and 10 communicating with the other ends of the discharge passage 7 and the supply passage 8, and the flow passages are connected to an external oil suction pump and an oil supply pump. (not shown), with the discharge passage 7 facing the flow passage 9 of the oil suction pump,
It also communicates the supply passage 8 with the flow passage 10 side of the oil feed pump, and is also equipped with, for example, a pulse motor, etc. connected to a speed sensor S that detects the output rotational speed on the sealed case 2 side. Adjustment device C,
It has a control function by opening and closing the valves V ₁ and V ₂ by B, and controls and maintains the rotational speed of the sealed case 2 side at a constant level by adjusting the amount of oil in the torque transmission chamber. . Note that the arrows in the drawings indicate the direction of oil flow during discharge and supply when the valves V ₁ and V ₂ are opened, and the direction of rotation of the drive disk 3, respectively.

As described above, according to the present invention, by setting the rotational speed on the output side to be sensed at a desired rotational speed in advance, the adjustment device is linked to the signal from the speed sensor S when the desired rotational speed is reached. C and B, close valve V ₂ and open valve V ₁ to drain the oil amount in the torque transmission chamber to drain path 7.
It is possible to reduce the amount of oil by discharging it to the oil suction pump side via the oil supply path 8, or close the valve _V1 and open the valve _V2 to increase the amount of oil supplied to the torque transmission chamber via the supply path 8. By using a fluid coupling, the entire device can be constructed as an extremely simple control and adjustment mechanism, and at the same time, it is lightweight, compact, and can be easily installed in a narrow space, and can be constructed at a lower cost. It is.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a fluid coupling device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a weir section taken along line A--A in FIG. 1. 1... Drive rotation shaft body, 2... Sealed case, 3...
... Drive disk, 4 ... Weir, 5 ... Minute gap, 6
...Return hole, 7...Discharge path, 8...Input path, 9,
10...Flow path, _V1 , _V2 ...Valve, S...Speed sensor, SB...Adjusting device.

Claims (1)

[Claims] 1 A small gap 5 for torque transmission is maintained between the shaft part of the sealed case 2 supported on the drive rotating shaft 1 and the inner wall surface of the case, and the oil is collected during rotation. A weir 4 is provided on a part of the outer circumferential surface of the sealed case 2 which is opposite to the inner circumferential surface of the sealed case 2, and a return hole 6 that penetrates the inside in the radial direction is provided near the weir and at the front in the rotational direction. one or more drive disks 3
The return hole 6 is placed at one end of the discharge passage 7 and the supply passage 8 provided inside the rotary shaft body 1 in the axial direction, the return hole 6 is placed on the discharge passage 7 side, and the minute gap 5 is placed on the supply passage. 8 side, respectively, and have a fixed interior, and furthermore, the discharge passage 7
The other end of the inlet passage 8 is connected to the flow passages 9 and 10 equipped with valves V ₁ and V ₂ connected to an external oil suction pump and an oil supply pump, and the discharge passage 7 is connected to the oil suction pump flow passage 9 side. In addition, the supply passage 8 is connected to the flow passage 1 of the oil feed pump.
The valves V ₁ and V ₂ are opened and closed by adjusting devices C and B, which communicate with the zero side and are connected with speed sensors S that detect the output rotational speed of the sealed case 2 side, to adjust the amount of oil in the torque transmission chamber. A fluid coupling device characterized in that it is configured to control and maintain the output rotational speed of the sealed case 2 side at a constant level by increasing and decreasing the output rotational speed.