JPH062065Y2 - Anti-sway mechanism for ship deceleration / reverse gear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a whirling prevention mechanism for a speed reducer / reverse gear for ships.

(Prior Art) When the forward / reverse clutch of the ship deceleration / reverse gear is in neutral, if there is lubricating oil between the drive side and driven side friction plates in the forward / reverse clutch, the viscosity of the lubricating oil causes a swinging motion, resulting in power loss. . Also, power loss occurs in the clutch on the fitted side during forward or reverse fitting. As a measure against this, in order to change the amount of lubricating oil at the time of fitting and at the time of neutralization, as shown in FIG. 3, a passage for lubricating oil is also provided at the same time as the forward / reverse switching valve 1 and switching is performed here. That is, in FIG. 3, the forward / reverse switching valve 1 is provided between the hydraulic oil circuits 6, 7 and 8 connecting the discharge port 3 of the hydraulic oil pump 2 and the forward / reverse clutches 4 and 5, and the circuit 10 branched from the lubricating oil circuit 9 is provided. , 11 are provided with throttles 12 to keep the amount of lubricating oil constantly supplied to the clutches 4, 5 small at the portions of the throttles 12, and the additional lubricating oil circuits 13, 14 are branched from the hydraulic oil circuit 6 to form a circuit. 10 and 11 are respectively connected to reduce the amount of lubricating oil to the reverse clutch 5 when moving forward, and reduce the amount of lubricating oil to the forward clutch 4 when moving backward.

However, if a structure is provided in which the passages 13 and 14 are appropriately connected to the inside of the forward / reverse switching valve 1 as shown in FIG. 3, the lubricating oil path becomes very complicated, and the lubrication is performed both when the reduction / reverse gear is fitted and when it is neutral. In the case of adopting a speed reduction / reversing machine with a conventional structure that does not change the oil amount, the switching valve structure and the lubricating oil path must be changed significantly, resulting in a significant increase in cost. As a prior art, there is Shoukai 58-56430.

(Purpose of the Invention) The present invention aims to reduce power loss at the time of forward or reverse insertion and prevent whirling at the time of neutral.

(Structure of the Invention) The present invention includes a hydraulic oil pump, a forward / reverse switching valve arranged in a hydraulic oil circuit that connects the discharge port of the pump and the forward / reverse clutch, and a lubricating oil circuit that supplies lubricating oil to the forward / reverse clutch. ,
A marine deceleration consisting of a large passage and a throttle passage arranged in the lubricating oil circuit for each clutch, and a cross-sectional area switching valve that switches to the large passage side by operating hydraulic pressure only when hydraulic oil is supplied to the clutch. It is a twisting prevention mechanism of the reverse rotation machine.

(Embodiment) In FIG. 1, the same reference numerals as those in FIG. 3 are corresponding parts. The hydraulic oil circuit 6 connected to the discharge port 3 of the hydraulic oil pump 2 is branched into a circuit 7 that communicates with the forward clutch 4 and a circuit 8 that communicates with the reverse clutch 5 in the part of the forward / reverse switching valve 17 having the same structure as the conventional structure. is doing. Further, the lubricating oil circuit 9 branches from the middle of the hydraulic oil circuit 6, and from the middle of the lubricating oil circuit 9 to the circuit 18 communicating with the forward clutch 4 and the circuit 19 communicating with the reverse clutch 5, and the circuits 18 and 19 respectively. The cross-sectional area switching valves 20 and 21 are interposed. Each switching valve 2
Nos. 0 and 21 respectively have a large passage 22 and a throttle passage 23 therein, and the throttle passage 23 is connected to the circuits 18 and 19 as shown in FIG. On the side opposite to the spring 24, circuits 25 and 2 branched from the circuits 7 and 8.
6 is connected, and when the hydraulic pressure is applied from the circuits 25 and 26, the large passage 22 is connected to the circuits 18 and 19 against the elasticity of the spring 24.

FIG. 2 shows a state in which the cross-sectional area switching valves 20 and 21 of the lubricating oil are in forward movement, and the valve body 28 is the reverse-side hydraulic oil circuit 8.
Since there is no hydraulic pressure of the spring 24, the throttle passage 23 is connected to the circuit 19 by the resilience of the spring 24, and the hydraulic pressure of the forward hydraulic fluid circuit 7 is increased at the valve body 29 portion. 2 and moves to the right in FIG. 2, the large passage 22 is in communication with the forward clutch lubricating oil circuit 18, and a large amount of lubricating oil can be supplied to the forward clutch 4.

(Effect of the Invention) As described above, in the present invention, the cross-sectional area switching valves 20 and 21 which are operated by the forward and reverse hydraulic pressures are provided in the middle of the lubricating oil circuits 18 and 19 of the forward and reverse clutches of the reduction / reverse gear, respectively. By providing hydraulic oil pressures when the respective clutches are engaged and switching the throttles of the lubricating oil circuits 18 and 19 between large and small, the amount of lubricating oil in the reverse and forward clutch parts is reduced during forward or reverse engagement to reduce power consumption. The loss can be reduced. Further, when neutral, the amount of lubricating oil to both clutch parts can be reduced to reduce power loss and prevent whirling.

The same effect can be expected when the present invention is applied to a speed reducer / reverse gear having three or more clutch parts.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram when the anti-slip mechanism according to the present invention is in a neutral state, FIG. 2 is an operation explanatory diagram when the cross-sectional area switching valve portion of the lubricating oil passage is forward, and FIG. 3 shows one conventional example. FIG. 3 is a hydraulic circuit diagram for 2 ... hydraulic oil pump, 3 ...
Discharge ports 4, 5 ... Forward / reverse clutch, 6, 7, 8 ... Hydraulic oil circuit, 17 ... Forward / reverse switching valve, 18, 19 ... Lubricating oil circuit,
20, 21 ... Cross-sectional area switching valve, 22 ... Large passage, 23 ... Throttle passage

Claims (1)

[Scope of utility model registration request] 1. A hydraulic oil pump, a forward / reverse switching valve arranged in a hydraulic oil circuit connecting a discharge port of the pump and a forward / reverse clutch, and a lubricating oil circuit for supplying lubricating oil to the forward / reverse clutch.
A marine deceleration consisting of a large passage and a throttle passage arranged in the lubricating oil circuit for each clutch, and a cross-sectional area switching valve that switches to the large passage side by operating hydraulic pressure only when hydraulic oil is supplied to the clutch. Anti-reverse rotation mechanism.