JPS62292593A - Power transmission system - Google Patents

Abstract

PURPOSE:To surely restrain generated vibration in a propulsion facility for a ship or the like, by setting an angle with which the vibration of an engine has a phase reverse to that of a propeller, and by engaging a clutch such that thus set angle coincides with the relative rotating angle between the input and output sides of the clutch. CONSTITUTION:As to the vibration characteristic of an engine and the vibration characteristic of a propeller 5 which is driven by power from the engine 1, they may be previously obtained by calculation or from experimental data or the like. Accordingly, set angles are previously obtained in accordance with the above-mentioned vibration characteristics, as the relative relationship between the crank angle of the engine 1 and the rotating angle of the propeller 5, with which the vibration of the engine has a phase reverse to that of the propeller 5 so that they are canceled out from each other. Meanwhile, an angle detecting means 8 actually measures a relative rotating angle between the input side 4 of a clutch 3 on the engine 1 side and the output side 7 of the clutch on the propeller 5 side, and the clutch is engaged by means of a clutch control means 11 so that thus detected relative rotating angle coincides with one of the set angle. Accordingly, it is possible to surely restrain generated vibration.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Industrial Field of Application 1 The present invention relates to a power transmission system, and particularly in propulsion equipment such as a ship that has a clutch between an engine and a propulsion device. This invention relates to a power transmission system that aims to reduce the number of images taken by controlling the connection of the.

[Prior Art] In general, marine propulsion equipment uses a diesel engine as the main engine and a screw propulsion device as the propulsion device, and the power of the machine is transmitted to the propulsion device via the main shaft. ing. A clutch may be interposed between the main engine and the propulsion device to interrupt power transmission.

[Problems to be Solved by the Invention] By the way, a diesel engine generates vibrations at a constant revolution: 'JJ' according to the crank angle from the intake stroke to the exhaust stroke. In addition, the screw propulsion device, which is rotationally driven by engine power, also becomes a source of vibration due to the reaction force from the water, and generates vibrations at a constant cycle according to the rotation angle due to the number and arrangement of blades, vibrations transmitted from the R gate, etc. let If such clear vibrations and the propulsion device's imaging are in the same phase and amplify each other's vibrations, large torsional vibrations will occur throughout the power transmission system! l! l1 etc. will occur.

If the engine and main shaft are directly connected here without a clutch, it will be easier to take photos if the relationship between the crank angle of the engine and the rotation angle of the propeller is adjusted appropriately beforehand when installing the propulsion equipment. It is also possible to reduce the movement.

However, when a clutch is interposed between the engine and the propeller, it is unclear what kind of relationship exists between the engine crank angle and the rotation angle of the propeller at the time of clutch engagement. Depending on the timing, large vibrations could occur.

[Means for solving the problem] In a power transmission system having a clutch between an engine and a propulsion device, an angle detection means for detecting the relative rotation angle between the input side and the output side of the clutch, and an angle detection means for detecting the relative rotation angle between the input side and the output side of the clutch, and An angle at which the vibrations and the vibrations of the propulsion unit are in opposite phases is set in advance, and the clutch control means engages the clutch so that the set angle matches the relative rotation angle detected by the angle detection means. It is something.

[Function] Regarding the function of the present invention, the vibration characteristics of the engine and the vibration characteristics of the propulsion unit driven by the engine power can be obtained as data through calculations and experiments in advance, so these problems can be easily solved. Based on the characteristics, a set angle is determined as a relative angular relationship between the engine crank angle and the propeller rotation angle at which these vibrations are in opposite phases and cancel each other out.J'3<.

On the other hand, the relative rotation angle between the input side of the clutch, which is the tfi tll side, and the output side of the clutch, which is the thruster side, is actually measured by the angle detection means, and the clutch control 1711 is set so that the detected relative rotation angle matches the set angle. The clutch is engaged by means.

[Embodiment] A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in the figure, 1 is an engine, and the output shaft 2 of this engine 1 is
The input side 4 of the clutch 3 is connected to the input side 4 of the clutch 3. Further, 5 is a screw propulsion device, and an output side 7 of the clutch 3 is connected to this propulsion device 5 via a main shaft 6. In this embodiment, the clutch 3 is of a conical type.

This clutch 3 is equipped with an angle detection means 8 for detecting a relative rotation angle of 0 between its input side 4 and output side 7. In this embodiment, a coded encoder is shown as the angle detection means 8. This is configured such that a pair of photoelectric elements 10 read the optical pattern of a code plate 9 attached to the rotating outer peripheral surfaces of the input side 4 and output side 7 of the clutch 3, respectively.

A clutch control means 11 is connected to the angle detection means 8, specifically the photoelectric element 10, configured in this manner. This clutch control means 11 mainly stores in advance an angle ψ that makes the vibrations of the engine 1 and the vibrations of the propulsion device 5 have opposite phases.
The clutch 3 is operated in accordance with a control unit 12 that compares and calculates the set angle ψ and the detected relative rotation angle θ, and a control signal output from the control unit 12 so that the set angle ψ and the relative rotation angle θ match. It is composed of a control device 13 that is fitted and connected. In this embodiment, a solenoid valve is shown as the clutch control device 13.

More specifically, the control section 12 operates as follows. First, the code plate 9 of the clutch 3 is set to an arbitrary reference rotational position (
This can be set arbitrarily, but for example, regarding the crank angle of engine 1, the top dead center position (T, D
, C), and regarding the rotation angle of the propeller 5, one of the blades may be set at the highest position. ) may be attached. In this case, the angular relationship in which the imaging of the engine 1 and the vibration of the propulsion device 5 are in opposite phases and cancel each other out is generally a certain relative rotation angle ψ. Such an angle is stored in advance in the control unit 12 as a set angle ψ. On the other hand, the control unit 12 controls each photoelectric element 10 of the angle detection means 8.
A calculation is performed on the crank angle of the engine 1 and the rotation angle of the propulsion device 5 from the reference rotation position read in , and then the difference between these angles, that is, the relative rotation angle θ, and the set angle ψ are compared. Then, when the clutch engagement command is input, the control unit 12 controls the control υ(l device 13
Outputs a control signal to.

Next, the code plate 9 of the clutch 3 is connected to the vibration of the separate spacer 1 and the propulsion device 5.
It may be installed in a position where the vibration is in opposite phase with the vibration of This is a case where the setting angle ψ, which is the control information of the control unit 12, is given in advance as the mounting position of the code plate 9. In this case, the angle ψ that makes the vibrations have opposite phases is O, and when the control unit 12 inputs the clutch engagement command, the reading angles from each photoelectric element 10 match, and the relative rotation angle θ
A control signal is output to the control unit @13 so that the value becomes 0 (=ψ).

Furthermore, the clutch control unit @13 is interposed in the middle of the feed pipe 14 for feeding operating pressure such as hydraulic pressure or pneumatic pressure to operate the clutch 3, and controls the feed pipe 14 by a control signal from the control unit 12. is fully opened and the operating pressure is transmitted to engage and connect the clutch 3.

Next, we will discuss the effect.

The fitting operation of the clutch 3 is performed when the propulsion device 5 is stopped. Among the input side 4 and output side 7 of the clutch 3, which are separated from each other before engagement, a known turning device or the like (
(not shown) drives the output shaft 2 of the engine 1, and the input side 4
While rotating, the angle detection means 8 detects the input side 4 and the output side 7.
The relative rotation angle θ is detected. Then, the control unit 12 outputs a control signal to the control device 13 to fully open the feed pipe 14 so that the detected relative rotation angle θ matches the set angle ψ, and the clutch 3 It will be mated with.

Note that the code plate 9 of the angle detection means 8 is not the clutch 3 itself, but the output shaft 2. of the separate shaft 1 connected to the clutch 3. It may also be provided on the main shaft 6 or the like.

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

The set angle at which the engine's imaging and the propulsion device's vibrations are set in opposite phases so that the vibrations strike each other matches the relative rotation angle between the input side and the output side of the clutch detected by the angle detection means. Since the clutch is engaged in this manner, it is possible to reliably suppress the photographing that occurs.

[Brief explanation of drawings]

The figure is a configuration diagram showing a preferred embodiment of the present invention. In the figure, 1 is an engine, 3 is a clutch, 4 is an input side thereof, 7 is an output side thereof, 5 is a propeller, 8 is an angle detection means, and 11 is a clutch control means. Patent applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Representative Patent Attorney Nobuo Kinutani 7; 8! /A investigation method

Claims (1)

[Claims] In a power transmission system having a clutch between an engine and a propulsion device, an angle detection means for detecting a relative rotation angle between an input side and an output side of the clutch, and a vibration of the engine and a vibration of the propulsion device. The angle that makes the opposite phase is set in advance,
A power transmission system comprising: clutch control means for engaging the clutch so that the set angle and the relative rotation angle detected by the angle detection means match.