JPS6249059A - Hydraulic control device for power take-off device - Google Patents

Abstract

PURPOSE:To simplify structure and to facilitate maintenance, by a method wherein feedback control forms a mechanical system. CONSTITUTION:A differential planetary gear device 5 is rotated and controlled by a control valve 24 according to a difference between rotation of a constant speed rotary motor 22, adapted to rotate an output shaft 4 at a constant speed for driving, and rotation of the output shaft 4 transmitted through a small differential planetary gear device 17. This constitution enables formation of a hydraulic control device by means of comparatively simple constituting parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a hydraulic f, 11 m device for a power take-off device;
1) In order to drive the output shaft at constant speed from the human-powered shaft through the differential M return gear device, compare the rotation speed of the output shaft and the rotation speed of the constant speed rotation motor. , depending on these rotational differences, the difference will be rotation speed! Hydraulic control 2I of power take-off device that mechanically eliminates control
I related to the i4 position.

1 [Conventional technique 1 1 In J3 marine engines, etc., the driving power of the drive source (
i5 Effectively utilize part of the driving power to generate electricity.
[City] A power extraction device that drives a rocky shore is known.

y This power take-off device employs the configuration shown in FIG. 4, for example.

■ As shown in Fig. 4, one shaft 1 connected to a drive source and driven to rotate is provided, and this Il
A fl electric machine 2 driven by the lffg shaft 1 is provided.

The generator 2 is driven to rotate at a constant speed by a power extraction device 3 that extracts a portion of the rotational drive power of the main shaft 1.

This power extraction device 3 has an output @ 4 connected to the generator 2, a differential planetary gear device 5, and an input shaft that transmits the driving force for 10 rotations of the main shaft to the output shaft 4 via the differential planetary gear device 5. 6
It is mainly composed of doh white.

A hydraulic control device 7 is installed in the power extraction device 3 configured in this manner. This hydraulic control device 7 is connected to an input shaft 6, and is connected to a hydraulic pump 8 which extracts rotational driving force from the input shaft 6 to drive it, and a hydraulic motor 10 which is connected to this hydraulic pump 8 through oil passages 9a and 9b. It is composed of The hydraulic motor 10 and the hydraulic pump 8 are configured to avoid forward and reverse rotation of the internal tooth width 5a of the 'fl star gear device 5 by the rotational driving force of the input shaft 6.

In addition, an electronic control RI for driving the output shaft 4 to rotate at a constant speed is also provided.
gi11 is stacked.

This electronic control device 11 is configured to operate the servo valve 8a of the hydraulic pump 8 by +1 Ill based on a signal from a rotation speed detection sensor 12 that detects the rotation speed of the output shaft 4. That is, so that the rotational speed of the output shaft 4 is always maintained at the set rotational speed, the electronic control device 11 adjusts the amount of oil supplied from the hydraulic pump 8 to the hydraulic motor 10 using the feedback control 0. It has become.

[Problems to be Solved by the Invention] By the way, when considering the maintenance of the power take-off device 3 configured as described above, it is important to consider the conventional electronic control system in which the electronic control device 11 is incorporated into the hydraulic control device 7, as shown in this conventional example. Adopting this method required advanced techniques for maintenance, and there were problems in that it was difficult to obtain replacement parts. Therefore, it has conventionally been desired that the hydraulic control device 7 be constructed as mechanically as possible to facilitate maintenance.

Additionally, the electronically controlled 8-position 11 generally has the problem that it is affected by ambient temperature and humidity, making it troublesome to manage the rasp and Vi position.

[Object of the Invention 1] The present invention has been proposed in order to effectively solve the problems in the conventional hydraulic control 211 device of a power extraction device.

An object of the present invention is to enable mechanically configuring feedback control for rotating an output shaft that drives a generator at a constant speed, and to facilitate hydraulic control of a power extraction device by eliminating maintenance of the hydraulic control device. The purpose is to provide equipment.

[Summary of the Invention] In order to achieve the above object, the present invention provides an output that is a part of the drive power taken out from the drive source to the input horn shaft, and is connected to the input shaft via a differential 'fl star gear device. In a hydraulic control device for a power extraction device that hydraulically controls the rotational speed of the differential planetary gear device to drive the shaft to rotate at a constant speed, the difference vJ″if!
A hydraulic motor that rotates the star gear device in forward and reverse directions, a hydraulic pump that supplies hydraulic oil to the hydraulic motor by the rotational driving force of the input J-axis to drive the hydraulic motor, and a rotational driving force of the output shaft. a power extraction means for taking out the power, a constant speed rotation motor connected to the power extraction means and transmitting a constant rotational driving force to the power extraction means; It consists of a control valve that controls the hydraulic oil supplied from the hydraulic pump to the hydraulic motor, and a hydraulic system that uses part of the drive power of the drive source to drive the output shaft connected to the generator at a constant speed. This is a mechanical configuration of the υ control device.

[Example code] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, an input shaft 6 is provided which is rotated by a portion of the driving power extracted from a driving source such as a marine engine. The output shaft 4 is not shown coaxially with the input shaft 6 f! Heavy electrical equipment is connected and the Q2 is cut off.

These input shaft 6 and output shaft 4 are different! , ll mψ are connected to each other by a gear system 5.

This difference fnl star gear device 5 has one end of the output shaft 4 (1(
The sun tooth width 5b thus formed, the internal gear 5a surrounding this sun tooth width 5b, and the sun gear 5b and the internal tooth width 5.
a and a planetary gear 5C that is supported by a frame 13 and revolves while rotating.

The differential idling gear device 5 configured in this way has an output shaft 4.
A hydraulic motor 10 is provided to rotate at a constant speed.

This hydraulic motor 10 has a 6fl wheel 14 that meshes with the outer side of the inner m#A width 58, and is configured to rotate an internal gear 5a in forward and reverse directions using hydraulic oil △ from a hydraulic pump 8, which will be described later. .

On the other hand, a hydraulic pump 8 for driving the hydraulic motor 10 is provided on the input shaft 6 side.

As shown in FIGS. 1 and 2, this hydraulic pump 8 is connected to a hydraulic motor 10 through oil passages 9a and 9b, and is also connected to an input shaft 6 through input gears 15 and 16. .

The hydraulic pump 8 has a hemispherical swash plate 8b inside thereof, and the swash plate 8b is tilted to change the stroke of the piston 8c.

The hydraulic pump 8 configured in this manner supplies hydraulic oil Δ to the hydraulic motor 1″0 by rotationally driving the input shaft 6, thereby driving the hydraulic motor 1″0.

Further, a power extraction means for extracting the rotational driving force of the output shaft 4 is provided.

In this embodiment, the power extraction means is constituted by a small differential T1 star gear unit 17 connected to the output shaft 4 via gears 18, 19 and 20. This small difference! I]' The star gear device 17 includes a sun gear 17-8 and this sun gear 1.
7a, and an @ mm wheel 17c that is supported by the frame 21 and rotates and revolves between the sun gear 17a and the internal teeth Φ17b. In particular, the frame body 21 is connected to the rotating shaft 20a of the gear 20 mentioned above.

Further, the sun gear 17a is driven to rotate at a constant speed by a constant speed rotation motor 22 installed coaxially with the sun gear 17a. That is, the constant speed rotary motor 22 transmits a driving force at a constant rotation speed to the small differential planetary gear device 17 via the sun gear 17a.

A differential gear 23 is provided on the outer periphery of the internal gear 17b of the small differential planetary gear device 17 and meshes with the internal gear 17b. The differential gear 23 is configured to rotate in forward and reverse directions due to the difference in rotational speed between the small differential planetary gear device 17, which extracts the rotational driving force of the output shaft 4, and the constant speed rotary motor 22.

Also, the difference! A control valve 24 is provided coaxially with the rotating shaft 23a of the ll gear 23. This control valve 24 is connected to the hydraulic pump 8 via oil passages 25a and 25b, and is connected to the oil supply source 2.
6 supplies control oil B to the hydraulic pump 8. Further, the valve 24 has a clutch 24a between it and the differential gear 23. This clutch 24a is the first
As shown in Fig. 3 and Fig. 3, when excessive rotational force is applied to the opposing clutch plates, that is, υ1 guilty plea 24
The control valve 24 slips when it is above the upper control limit or below the lower control limit.
Excessive rotational force is prevented from being applied to the rotating shaft 24b. In this embodiment, the valley gate valve 24 is a rotary type or a rack and pinion reciprocating type interlocked servo valve.

The control valve 24 configured in this way is connected to the constant speed rotation motor 22 obtained by the differential gear 23 and the small differential ljJ planetary gear device 1.
According to the differential rotation speed between the oil supply source 26 and the hydraulic pump 8, the control D oil B@υ1 is sent from the oil supply source 26 to the hydraulic pump 8. That is, the Luli control valve 24 changes the inclination angle of the swash plate 8b of the hydraulic pump 8 and controls the hydraulic fluid ff1A supplied from the hydraulic pump 8 to the hydraulic motor 10 so that the output shaft 4 is driven to rotate at a constant speed. It is supposed to be done.

Next, the operation of the present invention having the above configuration will be described.

As shown in FIG. 1, the rotational driving force of the input shaft 6 is transmitted to the output shaft 4 via the differential planetary gear device 5. Due to the rotational drive of the output shaft 4, the driving force of A is transferred to the small differential planetary gear device 1
7 will be transmitted.

On the other hand, the sun rat wheel 1 of this small differential planetary gear device 17
The driving force of a constant rotation speed from the constant speed rotation motor 22 is transmitted to this, and the rotation drive force 78 is rotated at a constant speed.

At this time, if the rotational speed NO of the output shaft 4 transmitted via the small planetary gear device 17 and the set rotational speed Nhi of the constant speed rotation motor 22 are equal, the differential rotational speed N3 in the differential gear 23 becomes O. As a result, the rotation axis 24b of the control valve 24 is maintained in the neutral position, and control oil B of the same pressure is supplied to the control valve 24 so as to fix the inclination angle α of the swash plate 8b of the hydraulic pump 8 at the set value. I will do it.

Further, when the differential gear 23 rotates in forward and reverse directions, that is, when the rotation speed No of the output shaft 4 and the set rotation speed N of the constant speed rotation motor 22 are different, the differential rotation of the differential gear 23 Number N3
The rotating shaft 24b of the control valve 24 has a predetermined torsion angle θ
It's going to get twisted. By tilting and twisting the rotation shaft 24b, the control valve 24 supplies the control oil B from the oil supply source 26 to the hydraulic pump 8 according to the tilt direction and the twist angle θ. That is, when the set rotational speed NM and the output rotational speed Na are different, the hydraulic motor 10 rotates the internal gear 5a in the forward and reverse directions to adjust the rotational speed NM,
The control valve 24 controls the swash plate 8b of the hydraulic pump 8 to be set at a predetermined inclination angle α so as to avoid the coincidence of N o.

By setting the swash plate 8b of the hydraulic pump 8 to a predetermined inclination angle α, the hydraulic fluid flA from the hydraulic pump 8 to the hydraulic motor 10 is controlled accordingly, and the hydraulic motor 10 is connected to the differential planetary gear device 5. Output shaft 4 connected to this via
will be driven to rotate at a constant speed.

As described above, the present invention utilizes a rotational difference between the constant speed rotation motor 22 and the output shaft 4 transmitted through the small differential planetary gear device 17 in order to rotate the output shaft 4 that drives the generator at a constant speed. The control valve 24 rotates the differential planetary gear unit 5 according to the
By controlling lIIj, it is possible to perform feedback control using a mechanical method instead of the conventionally adopted electronic control method feedback ill ill.

With this mechanical feedback system tLD, the hydraulic control device can be formed from relatively simple components, and maintenance, which has been a problem in the past, can be facilitated.

Additionally, unlike electronically controlled systems, mechanical configurations are less affected by ambient temperature and humidity, and can eliminate the need for equipment and management.

I can do that.

In addition, in the above embodiment, the constant speed rotation motor 22 and the output shaft 4 were configured to have the same rotation speed in order to drive the output shaft 4 at a constant speed, but the relationship between them is such that the constant speed rotation that is the set rotation speed is As long as the rotational speed N of the motor 22 is constant, the rotational speed NM may be set to be different from the rotational speed Na of the output shaft 4.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) Feedback control for driving the output shaft to rotate at a constant speed is performed by controlling the rotation of the differential planetary gear device using a control valve according to the rotation difference between the constant speed rotation motor and the output shaft transmitted via the power extraction means. By using a mechanical method for speed control, the hydraulic control device can be formed from relatively compact components, and maintenance of the hydraulic control device can be facilitated.

(2) By configuring the feedback control based on the electronic control system as a mechanical system, there is less influence from ambient temperature and humidity, and the equipment and management for this can be omitted.

[Brief explanation of the drawing]

FIG. 1 shows hydraulic control 2 of a power take-off device according to the present invention! ] Diagram showing the device, Figure 2 is a diagram showing the hydraulic pump and hydraulic motor in Figure 1 along the ■-■ line and ■-■ line, Figure 3 is a schematic diagram showing the clutch, and Figure 4 is the conventional It is a perspective view showing a hydraulic control device of an assistance take-off device. In the figure, 4 is an output shaft, 5 is a differential planetary gear system, 6 is an input shaft, 8 is a hydraulic pump, 10 is a hydraulic motor, 17 is a small differential planetary gear system, 22 is a constant speed rotating motor, and 24 is a control valve,
△ is hydraulic oil. Patent applicant: Ishikawajimaban V14 Heavy Industries Co., Ltd. Representative patent attorney: Nobuo Kinuya μ
1nI Figure 3

Claims (1)

[Claims] A part of the drive power taken out from the drive source to the input shaft is used to control the rotational speed of the differential planetary gear set in order to drive the output shaft connected to the input shaft via the differential planetary gear set to rotate at a constant speed. In a hydraulic control device for a power take-off device that is hydraulically controlled, a hydraulic motor that rotates the differential planetary gear device in forward and reverse directions to rotate the output shaft at a constant speed, and a hydraulic motor that rotates the differential planetary gear device in forward and reverse directions to drive the output shaft at a constant speed; a hydraulic pump that supplies hydraulic oil to the hydraulic motor using rotational driving force; a power extraction means that extracts the rotational driving force of the output shaft; and a constant speed that is connected to the power extraction means and that transmits a constant rotational driving force thereto. A power extraction device comprising: a rotary motor; and a control valve that controls the amount of hydraulic fluid supplied from the hydraulic pump to the hydraulic motor according to the rotational difference between the constant speed rotation motor and the power extraction means. Hydraulic control device of the device.