JPH09250568A - Acceleration device for ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately adjust oil pressure at every hull, by providing a silencer mechanism at the time of the low speed of an engine, and an acceleration mechanism, for lowering clutch hydraulic pressure to improve acceleration performance; on a hydraulic circuit, to make both the mechanisms changeable, to make oil pressure adjustable at every mechanism. SOLUTION: A silencer mechanism detects a resonance frequency of a deceleration reverting gear or of an engine, to switch a silencer.acceleration selector valve V8, to flow a pressure oil to a hydraulic fluid tank T via a pressure adjusting valve V9 and silencer restriction 2, and a clutch is slipped, to avoid a resonant frequency region. In an acceleration mechanism, a deceleration reversing gear clutch is separated to join the clutch after an engine rotation frequency is reached to a turbocharger effective rotation frequency region. At this time, an acceleration valve V11 and an acceleration restriction 3 are arranged in series for preventing shock joining, to be joined by the pressure oil via the acceleration restriction 3 having high slip ratio. The mechanism is switched by a selector valve V10, to provide a silencer oil pressure adjusting screw B and an acceleration oil pressure adjusting screw A on the selector valve 8 and the acceleration valve V11 respectively, thereby adjusting pressure separately at the time of switching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine reduction / reverse gear attached to a marine engine, and a muffling mechanism for preventing rattling noise due to torque fluctuations when the engine speed is low, and an acceleration mechanism for improving acceleration performance during engine acceleration. Is installed side by side, and the two can be switched as needed to independently set the respective hydraulic pressures.

[0002]

2. Description of the Related Art Conventionally, the same applicant has applied for a technique relating to an acceleration method and an acceleration device in a marine reduction / reversing machine. For example, Japanese Patent Application No. 7-30881
Like No. 5.

[0003]

SUMMARY OF THE INVENTION The present invention eliminates the rattling noise generated at a certain number of revolutions of an engine mounted on a ship and, at the time of starting from a fishing port, exhibits the effect of a turbocharger. It is designed to be able to accelerate up to a number at a stretch, and to accelerate the ship at a speed comparable to other ships. Further, the hulls provided with the engine and the marine reduction / reverse gear differ depending on the respective shipyards, so that the hydraulic pressures of the acceleration mechanism and the sound deadening mechanism cannot be determined from the beginning. Therefore, it is necessary to adjust the adjusting hydraulic pressure to match each hull, but the adjusting hydraulic pressure adjusting screw A provided in the acceleration mechanism and the noise reducing hydraulic adjusting screw B provided in the muffling mechanism are used to obtain and adjust the matching hydraulic pressure for each hull. It is configured to be able to do.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. According to a first aspect of the present invention, in a marine speed reducer / reverse gear having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement from a hydraulic pump to a forward clutch and a reverse clutch via a forward / reverse switching valve, the hydraulic circuit includes: , A muffling mechanism is provided to prevent rattling noise due to torque fluctuations at low engine speeds, and an acceleration mechanism is added to reduce the operating hydraulic pressure of the clutch during engine acceleration and slip the clutch to improve acceleration performance. If necessary, the sound deadening mechanism and the acceleration mechanism can be switched and used, and the oil pressures of the sound deadening mechanism and the acceleration mechanism can be adjusted independently for each mechanism.

According to a second aspect of the present invention, there is provided a marine speed reducer / reverse gear having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement to a forward clutch and a reverse clutch from a hydraulic pump via a forward / reverse switching valve. The hydraulic circuit is equipped with a noise reduction mechanism to prevent rattling noise due to torque fluctuations at low engine speeds.Furthermore, when the engine accelerates, the loose fitting valve operating pressure is reduced, and the clutch operating oil pressure is reduced to improve acceleration performance. An accelerating mechanism is provided so that the muffling mechanism and the accelerating mechanism can be switched and used as needed, and the hydraulic pressures of the muffling mechanism and the accelerating mechanism can be independently adjusted for each mechanism.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. FIG. 1 is a hydraulic circuit diagram of an embodiment in which an accelerating valve V11 is separately provided as an accelerating mechanism, and a switching valve V10 between a muffling mechanism and an accelerating mechanism is provided. FIG. 2 shows an embodiment in which the loose fitting inlet valve V6 is also used as the acceleration mechanism, and the loose fitting inlet pressure switching valve V1 is provided separately from the loose fitting inlet valve V6.
FIG. 3 is a hydraulic circuit diagram of an embodiment in which 2 is provided. FIG. 3 shows an embodiment in which a slow-fitting valve V6 is also used as an acceleration mechanism, and a switching mechanism S1 is provided for switching the back pressure of the slow-fitting valve V6 together with the operation of the switching valve V10. FIG. 4 is a drawing specifically showing the mechanism of the switching mechanism S1 for switching the back pressure in the embodiment of FIG.

Referring to FIG. 1, the overall hydraulic circuit configuration of the marine reduction / reversing machine will be described. First, the hydraulic fluid in the hydraulic oil tank T is increased in pressure by the hydraulic pump P and discharged. The pressure oil from the hydraulic pump P is used as a safety valve V4 and an operating oil pressure adjusting valve V
A branch point with 5 is reached. The safety valve V4 is a valve that compensates the safety of the entire circuit. The operating oil pressure adjusting valve V5 is a valve integrally formed with the loose fitting valve V6.

The hydraulic oil whose pressure is adjusted by the hydraulic oil pressure adjusting valve V5 is pressure-adjusted by the lubricating oil pressure adjusting valve V7 and is supplied as lubricating oil for the forward clutch FC and the reverse clutch RC. Therefore, the lubricating oil cooler LC for the operating oil as the lubricating oil and the lubricating oil filter S are arranged in front of the lubricating oil pressure adjusting valve V7. The hydraulic oil whose pressure is adjusted by the lubricating oil pressure adjusting valve V7 is supplied as lubricating oil from the front of the lubricating oil pressure adjusting valve V7 to the lubricated portions of the forward clutch FC and the reverse clutch RC. The lubricating oil / working oil flowing out from the lubricating oil pressure adjusting valve V7 is a working oil tank T.
Return to A loose fitting valve V6 is attached to the operating hydraulic pressure adjusting valve V5.

The pressure oil that has passed through the branch point between the safety valve V4 and the working oil pressure adjusting valve V5 is then converted into the governor valve V3 and the switching valve V.
Via a two-way junction to 10. Then, it proceeds to the forward / reverse switching valve V2 via the low speed valve V1. Then, between the low speed valve V1 and the forward / reverse switching valve V2, pressure oil is first branched in the directions of the noise reduction / acceleration switching valve V8 of the noise reduction mechanism and the pressure regulating valve V9. Next, the acceleration valve V1 of the acceleration mechanism
It also branches in the direction of 1.

When the neutral valve V6 is in the neutral position, the loose valve V6 is
Since the back chamber 6 is opened to the hydraulic oil tank T, the spring pressure is not applied to the hydraulic pressure adjusting valve V5. In this state, the hydraulic pressure control valve V5 is
Since the pressure oil from the hydraulic pump P is supplied to the back chamber, the operating oil pressure adjusting valve V5 is switched to the open state. Therefore, even when the forward / reverse switching valve V2 is switched to a position for supplying pressure oil to the forward clutch FC or the reverse clutch RC, the pressure of the forward clutch FC or the reverse clutch RC does not rise and the clutch is not engaged. is there.

Next, when the forward / reverse switching valve V2 is switched to forward or reverse, the pressure oil from the hydraulic pump P gradually flows through the throttle circuit in the forward / reverse switching valve V2 into the back chamber of the loose fitting inlet valve V6. Is supplied to. As a result, the loose insertion valve V6 is gradually switched via the spring to the direction in which the operating hydraulic pressure adjustment valve V5 is closed, and the pressures in the forward clutch FC and the reverse clutch RC rise, and the forward clutch is operated slowly. Since the FC and the reverse clutch RC are connected, it is possible to suppress the shocking engagement of the clutch.

The reason for providing the low speed valve V1 is as follows. In a normal ship, the idle speed of the engine is set high in order to avoid noise generation due to resonance between the clutch gear and the engine rotation. In such a ship, there is a problem that the engine speed does not decrease when it is desired to make the engine speed lower than the idling speed and to make a cruising at a low speed at the time of entering and leaving the port or during the fishing work. Therefore, in order to obtain such a slow speed navigation, the low speed navigation lever L1 is further operated at the idle speed of the engine to limit the amount of pressure oil to be fed from the forward / reverse switching valve V2 to the clutch. As a result, the propeller speed is reduced, and the propeller speed signal is fed back from the propeller side by the governor valve V3 to adjust the operating force of the low speed valve V1 and feed back to the operation amount of the low speed navigation lever L1. It is configured to control.

Next, a sound deadening / acceleration switching valve V8 which is a sound deadening mechanism
The reason why the pressure regulating valve V9 is provided will be described. In a certain low speed range from the idle speed of the engine, a large rattle noise is generated by resonating with the engine speed, and a torsional vibration is generated. In order to prevent the rattling noise generated at this resonance frequency portion, a pressure regulating valve V9 and a muffling diaphragm 2 are provided near this frequency in order to reduce the operating oil pressure. Therefore, the sensor detects the constant resonance frequency determined by the marine speed reducer / reverse machine and the engine, and
By switching the acceleration switching valve V8, the pressure oil from the hydraulic pump P leaks to the hydraulic oil tank T via the pressure regulating valve V9 and the muffler throttle 2, and the clutch slips,
It is constructed so as to be out of the resonance frequency range.

Next, the reason for providing the acceleration mechanism will be described. 2. Description of the Related Art In recent years, in marine engines such as small fishing boats, those equipped with a supercharger, that is, a turbocharger are increasing in order to realize a large output with a small diameter bore within a regulation. This is because it is necessary for the fishing boat to arrive at the fishing ground early and secure the fishing ground at the time of fishing in the morning, and it is required that the acceleration at the time of start is good.

However, in an engine equipped with a turbocharger, only when the engine speed reaches a certain number or more,
The turbocharger's rotation speed becomes a predetermined rotation speed, and a supercharged state of air supply occurs.Until then, the rotation speed of the turbocharger turbine was low, and it was not possible to push in sufficient air supply. Since an extra output for starting the turbocharger is also required, there is a problem that the acceleration performance becomes worse than the engine without the turbocharger until the engine speed rises to a certain level. In other words, the acceleration performance in the low rotation range after starting is rather deteriorated.

For this reason, in a ship equipped with an engine equipped with a turbocharger, in order to improve the acceleration performance, first, the engine speed is increased with the clutch of the marine reduction / reversing machine separated, and the turbocharger's speed is increased. After reaching the range of the effective rotational speed, the clutch may be completely joined to start the vehicle. However, in this case, a sudden start / acceleration state occurs at the same time as the engagement of the clutch, so that it is necessary for the crew to take a safety posture during acceleration. Further, since the clutch joining at such a high rotational speed is highly likely to be impact joining, it is necessary to join the clutch with the pressure oil through the throttle by the acceleration throttle 3 having a higher slip ratio. The present invention is an acceleration valve V
11 and the acceleration diaphragm 3 are arranged in series.

The valve of the muffling mechanism and the valve of the accelerating mechanism are the same in that the slip of the clutch is generated. However, since the slip ratio of the slip in the muffling mechanism is smaller, the muffling diaphragm is reduced. No. 2 has a higher degree of throttling and a smaller amount of pressure oil leakage. On the contrary, in the case of the acceleration mechanism, the slip ratio needs to be set higher, the acceleration throttle 3 has a lower throttle degree, and the leakage amount of the pressure oil is set larger.

In the present invention, the switching between the muffling mechanism and the acceleration mechanism is performed by pushing the acceleration switch 1 specially provided so that the operator can recognize the acceleration state.
The switching valve V10 composed of a solenoid valve is configured to switch. When the acceleration switch 1 is set in the acceleration state, the sound deadening / acceleration switching valve V8 closes the circuit to the pressure regulating valve V9 and the sound deadening diaphragm 2, and the sound deadening mechanism does not operate.

A switching hydraulic pressure adjusting mechanism for the muffling / acceleration switching valve V8 is attached to the muffling / acceleration switching valve V8 as a muffling hydraulic pressure adjusting screw B. Further, when the acceleration switch 1 is turned on, the acceleration valve V11 is opened, and the pressure oil escapes in the direction of the acceleration throttle 3. The accelerating valve V11 is also provided with an accelerating hydraulic pressure adjusting screw A so that the sound deadening mechanism and the accelerating mechanism can separately adjust the pressure at the time of switching.

Next, in FIG. 2, instead of the acceleration valve V11 provided in the embodiment of FIG. 1, an accelerating pressure / slowly fitting pressure switching valve V12 is attached to the portion of the loose fitting inlet valve V6. The accelerating pressure / slowly fitting pressure switching valve V12 is also switched by switching the acceleration switch 1 ON, whereby the opening / closing operation is performed. When the normal acceleration switch 1 is OFF, the pressure oil of the forward clutch FC and the reverse clutch RC is communicated with the back chamber of the loose fitting valve V6, but when the acceleration switch 1 is pressed, the forward clutch is pushed. The pressure oil of FC and the reverse clutch RC leaks from the acceleration throttle 3 by opening the acceleration pressure / slowly fitting pressure switching valve V12. The acceleration diaphragm 3 is configured to have the same degree of diaphragm as the acceleration diaphragm 3 in FIG.

Next, the embodiment shown in FIG. 3 will be described. Also in this case, when the operator wants to generate the acceleration state, the operator turns on the acceleration switch 1. As a result, the switching valve V10 constituted by the solenoid valve is switched, the pressure oil from the hydraulic pump P passes through the switching valve V10, and the back pressure arranged in the back chamber of the loose fitting valve V6 is switched. It is supplied to S1.

The switching mechanism S1 for switching the back pressure is
While the loose fitting inlet valve V6 gradually introduces the pressure oil of the forward hydraulic clutch FC and the reverse clutch RC in the direction of increasing the pressure oil of the operating oil pressure adjusting valve V5, the spool of the loose fitting inlet valve V6 is attached. The urging force of the urging springs 9 and 10 is relaxed, and the acceleration diaphragm 3
The pressure oil is configured to be supplied to the inner side of the piston 8 in FIG. 4 in the same direction as that in which the pressure oil leaks from the hydraulic pump P. Thus, by configuring the switching mechanism S1 for switching the piston 8 and the back pressure, the action of the acceleration throttle 3 for the acceleration mechanism can be performed. Also in the embodiment of FIGS. 3 and 4, the acceleration hydraulic pressure adjusting screw A is arranged at the rear portion of the piston 8, and the acceleration hydraulic pressure can be adjusted by adjusting the acceleration hydraulic pressure adjusting screw A.

[0023]

As described above, the present invention has the following advantages. A marine speed reducer / reverse gear having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement from a hydraulic pump to a forward clutch and a reverse clutch via a forward / reverse switching valve as set forth in claim 1. , A muffling mechanism is provided to prevent rattling noise due to torque fluctuations at low engine speeds, and an acceleration mechanism is added to reduce the operating hydraulic pressure of the clutch during engine acceleration and slip the clutch to improve acceleration performance. If necessary, the sound deadening mechanism and the acceleration mechanism can be switched and used.
Since the hydraulic pressures of the muffling mechanism and the acceleration mechanism can be adjusted independently for each mechanism, it is possible to muffle the rattling noise that occurs at a certain engine speed, and when starting from the fishing port, the turbocharger Since it is possible to accelerate at a speed up to the number of revolutions at which the effect is exerted, it is possible to improve the accelerating property of the ship. Further, the hulls provided with the engine and the marine reduction / reverse gear differ depending on the respective shipyards, so that the hydraulic pressures of the acceleration mechanism and the sound deadening mechanism cannot be determined from the beginning. It is necessary to set the adjusting hydraulic pressure that matches each hull, but by using the acceleration hydraulic adjusting screw A provided on the acceleration mechanism and the muffling hydraulic adjusting screw B provided on the muffling mechanism,
It is possible to obtain and adjust the hydraulic pressure that matches each hull.

According to a second aspect of the invention, there is provided a marine speed reducer / reverse gear having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement from a hydraulic pump to a forward clutch and a reverse clutch via a forward / reverse switching valve. The hydraulic circuit is equipped with a noise reduction mechanism to prevent rattling noise due to torque fluctuations at low engine speeds.Furthermore, when the engine accelerates, the loose fitting valve operating pressure is reduced, and the clutch operating oil pressure is reduced to improve acceleration performance. An acceleration mechanism is also installed to switch between the sound deadening mechanism and the acceleration mechanism as needed, and the oil pressures of the sound deadening mechanism and the acceleration mechanism can be adjusted independently for each mechanism. By supplying the pressure oil switched by the switching valve V10 to the loose fitting valve V6 and the working hydraulic pressure adjusting valve V5 mounted in the reversing machine, the acceleration throttle 3 equivalent to the acceleration mechanism 3 can be obtained. Ri rate it is possible to generate a is was able to be configured at low cost the ability to compact.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram of an embodiment in which an accelerating valve V11 is separately provided as an accelerating mechanism, and a switching valve V10 between a muffling mechanism and an accelerating mechanism is provided.

FIG. 2 is a hydraulic circuit diagram of an embodiment in which a loose-fitting input valve V6 is provided separately from the slow-fitting inlet valve V6 in the embodiment in which the loose-fitting inlet valve V6 is also used as an acceleration mechanism.

FIG. 3 is a hydraulic circuit diagram of an embodiment in which a loose insertion valve V6 is also used as an acceleration mechanism, and a switching mechanism S1 is provided for switching the back pressure of the loose insertion valve V6 together with the operation of the switching valve V10.

4 is a drawing specifically showing a mechanism of a switching mechanism S1 for switching back pressure in the embodiment of FIG.

[Explanation of symbols]

 1 acceleration switch 2 muffler throttle 3 acceleration throttle V1 low speed valve V2 forward / reverse switching valve V3 governor valve V4 safety valve V5 actuating oil pressure adjusting valve V6 loose fitting injection valve V7 lubrication oil pressure adjusting valve V8 mute / acceleration switching valve V9 pressure adjusting valve V10 switching valve V11 acceleration valve V12 Acceleration pressure / loose fitting pressure switching valve S1 Switching mechanism for switching back pressure

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F16D 25/14 640 F16D 25/14 640X F16L 55/02 F16L 55/02

Claims (2)

[Claims] 1. A marine speed reducer / reverse gear having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement from a hydraulic pump to a forward clutch and a reverse clutch via a forward / reverse switching valve, wherein: A muffling mechanism is provided to prevent rattling noise due to torque fluctuations at low engine speeds, and an acceleration mechanism is also installed to reduce the operating hydraulic pressure of the clutch when the engine accelerates and slip the clutch to improve acceleration performance. In accordance with the above, a sound deadening mechanism and an acceleration mechanism can be switched and used, and the hydraulic pressures of the sound deadening mechanism and the acceleration mechanism can be independently adjusted for each mechanism. 2. A marine speed reduction / reversing machine having a hydraulic circuit for selectively supplying hydraulic oil for clutch engagement from a hydraulic pump to a forward clutch and a reverse clutch via a forward / reverse switching valve, wherein the hydraulic circuit comprises: A muffling mechanism is provided to prevent rattling noise due to torque fluctuations at low engine speeds.In addition, an acceleration mechanism that improves the acceleration performance by lowering the loose fitting valve operating pressure and the clutch hydraulic oil pressure when the engine accelerates An accelerator for a marine vessel, which is provided side by side and can be used by switching between the sound deadening mechanism and the acceleration mechanism, and the hydraulic pressures of the sound deadening mechanism and the acceleration mechanism can be adjusted independently for each mechanism.