Small marine gearbox hydraulic control system

Abstract

The utility model belongs to the technical field of marine gearbox transmission, and particularly relates to a small marine gearbox hydraulic control system which comprises an oil supply way, an oil inlet end of the oil supply way is connected with an oil supply device, the oil supply device is used for pumping oil in an oil tank into the oil supply way, and one oil outlet end of the oil supply way is communicated with the oil inlet end of a main pressure regulating valve. The other oil outlet end of the oil supply path is communicated with the oil inlet end of an adjustable throttle valve, the oil outlet end of the adjustable throttle valve is communicated with a clutch control oil path, and the clutch control oil path comprises two clutch control branches communicated with the clutch; the cooling oil way is communicated with the oil outlet end of the main pressure regulating valve; the automatic oil pressure feedback oil way comprises a shuttle valve, the oil outlet end of the shuttle valve is communicated with the piston cavity of the main pressure regulating valve through a throttling hole, and the two oil inlet ends of the shuttle valve are connected with the two clutch control branches in parallel respectively. Through the arrangement of the automatic feedback oil way, the oil pressure of the clutch can be quickly fed back into the main pressure regulating valve to realize pressure regulation.

Description

Technical Field

[0001] This utility model belongs to the field of marine gearbox transmission technology, and particularly relates to a hydraulic control system for a small marine gearbox. Background Technology

[0002] Existing hydraulic control systems for small marine gearboxes cannot promptly regulate the main oil circuit pressure when controlling the clutch oil pressure, resulting in a slow response speed. Therefore, there is an urgent need for a hydraulic control system for small marine gearboxes to solve this problem. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic control system for a small marine gearbox to solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] A small marine gearbox hydraulic control system includes:

[0006] The oil supply circuit has an inlet end connected to an oil supply device, which pumps oil from the tank into the oil supply circuit. One outlet end of the oil supply circuit is connected to the inlet end of the main pressure regulating valve, and the other outlet end of the oil supply circuit is connected to the inlet end of an adjustable flow valve. The outlet end of the adjustable flow valve is connected to a clutch control circuit, which includes two clutch control branches connected to the clutch.

[0007] The cooling oil circuit is connected to the oil outlet of the main pressure regulating valve;

[0008] The automatic oil pressure feedback circuit includes a shuttle valve. The oil outlet of the shuttle valve is connected to the piston chamber of the main pressure regulating valve through a throttle orifice. The two oil inlets of the shuttle valve are respectively connected in parallel to the two clutch control branches.

[0009] Optionally, the clutch control oil circuit includes an electromagnetic reversing valve, the oil inlet of which is connected to the oil outlet of the adjustable flow valve, the two oil outlets of which are respectively connected to the oil inlet of the corresponding clutch control branch, and the oil outlet of the clutch control branch is connected to the clutch oil chamber.

[0010] Optionally, the cooling oil circuit has an inlet end connected to an overflow valve in the middle, and the outlet end of the overflow valve is connected to the oil tank. The overflow valve is used to allow hydraulic oil in the cooling oil circuit that exceeds the set oil pressure to flow back into the oil tank.

[0011] Optionally, the oil supply circuit has a monitoring port connected in parallel at the oil inlet end for monitoring the oil pressure of the main oil circuit.

[0012] Optionally, a monitoring port for monitoring clutch oil pressure is connected in parallel to the oil outlet side of the clutch control branch.

[0013] Optionally, the cooling oil circuit is connected in parallel with a monitoring port for monitoring the oil pressure of the cooling oil circuit.

[0014] Optionally, the cooling oil circuit is connected in parallel with a monitoring port for monitoring the oil temperature of the cooling oil circuit.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] In use, the two inlet ends of the shuttle valve are connected in parallel with the two clutch control branches respectively. The hydraulic oil flowing out enters the piston chamber of the main pressure regulating valve through the throttle orifice, pushing the piston to move against the spring force to adjust the opening of the main pressure regulating valve. The main oil pressure is controlled by adjusting the input flow rate and the back pressure feedback of the oil pressure automatic feedback oil circuit composed of the shuttle valve and the throttle orifice. The automatic feedback oil circuit can quickly feed back the clutch oil pressure to the main pressure regulating valve to achieve pressure regulation. At the same time, an adjustable flow valve is added before the clutch control oil circuit to realize manual control of the flow rate into the clutch, thereby realizing the adjustment of the clutch pressure build-up response. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Among them, 1. main pressure regulating valve; 2. solenoid directional valve; 3. shuttle valve; 4. throttle orifice; 5. adjustable flow valve; 6. relief valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figure 1 This utility model discloses a hydraulic control system for a small marine gearbox, comprising:

[0023] The oil supply circuit has an inlet end connected to an oil supply device, which pumps oil from the tank into the oil supply circuit. One outlet end of the oil supply circuit is connected to the inlet end of the main pressure regulating valve 1, and the other outlet end of the oil supply circuit is connected to the inlet end of the adjustable flow valve 5. The outlet end of the adjustable flow valve 5 is connected to the clutch control circuit, which includes two clutch control branches connected to the clutch.

[0024] The cooling oil circuit is connected to the oil outlet of the main pressure regulating valve 1;

[0025] The automatic oil pressure feedback circuit includes a shuttle valve 3. The oil outlet of the shuttle valve 3 is connected to the piston chamber of the main pressure regulating valve 1 through the throttle hole 4. The two oil inlets of the shuttle valve 3 are connected in parallel to the two clutch control branches respectively.

[0026] In use, the two inlet ends of the shuttle valve 3 are connected in parallel with the two clutch control branches respectively. The hydraulic oil that flows out enters the piston chamber of the main pressure regulating valve 1 through the throttle orifice 4, pushing the piston to move against the spring force to adjust the opening of the main pressure regulating valve 1. The main oil pressure is controlled by adjusting the input flow rate and the back pressure feedback of the oil pressure automatic feedback oil circuit composed of the shuttle valve 3 and the throttle orifice 4. The automatic feedback oil circuit can quickly feed back the clutch oil pressure to the main pressure regulating valve 1 to achieve pressure regulation. At the same time, an adjustable flow valve 5 is added before the clutch control oil circuit to realize manual control of the flow rate into the clutch, thereby realizing the adjustment of the clutch pressure build-up response.

[0027] As an optional implementation, the clutch control oil circuit includes an electromagnetic reversing valve 2. The oil inlet of the electromagnetic reversing valve 2 is connected to the oil outlet of the adjustable flow valve 5. The two oil outlets of the electromagnetic reversing valve 2 are respectively connected to the oil inlet of the corresponding clutch control branch. The oil outlet of the clutch control branch is connected to the oil chamber of the clutch.

[0028] As an optional implementation, the middle part of the cooling oil circuit is connected to the oil inlet of the overflow valve 6, and the oil outlet of the overflow valve 6 is connected to the oil tank. The overflow valve 6 is used to allow the hydraulic oil in the cooling oil circuit that exceeds the set oil pressure to flow back into the oil tank.

[0029] As an optional implementation, the oil supply line has a monitoring port connected in parallel at the oil inlet end for monitoring the oil pressure of the main oil line.

[0030] As an optional implementation, a monitoring port for monitoring clutch oil pressure is connected in parallel to the oil outlet side of the clutch control branch.

[0031] As an optional implementation, the cooling oil circuit is connected in parallel with a monitoring port for monitoring the oil pressure in the cooling oil circuit.

[0032] As an optional implementation, the cooling oil circuit is connected in parallel with a monitoring port for monitoring the temperature of the cooling oil circuit.

[0033] This hydraulic control system consists of a main pressure regulating valve 1, a solenoid directional valve 2, a shuttle valve 3, a throttle orifice 4, an adjustable flow valve 5, and a relief valve 6.

[0034] refer to Figure 1 Among them, P1 is the main oil pressure monitoring port, P2 is the cooling and lubrication pressure monitoring port, P3 is the clutch C1 pressure monitoring port, P4 is the clutch C2 pressure monitoring port, Q1 is the oil pump input flow rate, Q2 is the clutch C1 cooling, Q3 is the clutch C2 cooling, Q4 is the bearing and other component cooling, and T is the temperature sensor monitoring port.

[0035] This hydraulic system comprises an oil supply circuit, a clutch control circuit, a cooling circuit, and an automatic oil pressure feedback circuit. The oil pump speed is controlled to adjust the input flow rate Q1, thereby controlling the pressure in the oil supply circuit. After entering the oil supply circuit, the hydraulic oil is divided: one portion flows to the cooling circuit through the main pressure regulating valve 1, while the other portion enters the inlet of the adjustable flow valve 5. The amount of oil diverted to the cooling circuit is adjusted by regulating the opening of the main pressure regulating valve 1, thus controlling the oil pressure entering the adjustable flow valve 5.

[0036] The working principle of controlling the valve opening of the main pressure regulating valve 1 is as follows:

[0037] The oil circuit switching of clutches C1 and C2 is controlled by solenoid directional valve 2. When solenoid directional valve 2 is in the neutral position, the pressure of clutches C1 and C2 is released. When solenoid directional valve 2 is in the left position, clutch C1 has pressure (the pressure is the same as the main oil pressure), while clutch C2 has no pressure. When solenoid directional valve 2 is in the right position, clutch C1 has no pressure, while clutch C2 has pressure (the pressure is the same as the main oil pressure). It also features an emergency operation positioning locking device, which allows manual locking of the solenoid directional valve 2.

[0038] When hydraulic oil enters the corresponding clutch control branch, part of the hydraulic oil is diverted to the oil inlet end of shuttle valve 3, and enters the piston chamber of main pressure regulating valve 1 through the throttle hole 4 connected to the oil outlet end of shuttle valve 3. This pushes the piston of main pressure regulating valve 1 to overcome the elastic movement of the spring and realize the adjustment of the valve opening of main pressure regulating valve 1.

[0039] The cooling oil circuit is equipped with a P2 (cooling and lubrication pressure) monitoring port and a T (temperature) monitoring port. The flow rate overflowing from the oil supply circuit goes to the cooling and lubrication of various components through Q2, Q3 and Q4.

[0040] When the oil pressure in the cooling oil circuit exceeds the set oil pressure, the excess hydraulic oil is discharged into the oil tank through the overflow valve 6.

[0041] The adjustable flow valve 5 can be manually controlled. The oil inlet of the adjustable flow valve 5 is connected to one of the oil outlets of the oil supply circuit. The oil outlet of the adjustable flow valve 5 is connected to the oil inlet of the solenoid directional valve 2. The output oil pressure of the solenoid directional valve 2 can be adjusted by adjusting the opening of the adjustable flow valve 5.

[0042] The key technical point of this utility model is that the oil supply circuit can control the main oil pressure through input flow regulation and back pressure feedback, and the clutch pressure can be controlled through the electromagnetic reversing valve 2. An adjustable flow valve 5 is added before the main oil circuit reversing solenoid valve to realize manual control of the flow into the clutch, thereby realizing the adjustment of the clutch pressure build-up response.

[0043] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A hydraulic control system for a small marine gearbox, characterized in that, include: The oil supply circuit has an inlet end connected to an oil supply device, which is used to pump oil from the oil tank into the oil supply circuit. One outlet end of the oil supply circuit is connected to the inlet end of the main pressure regulating valve (1), and the other outlet end of the oil supply circuit is connected to the inlet end of the adjustable flow valve (5). The outlet end of the adjustable flow valve (5) is connected to the clutch control circuit, which includes two clutch control branches connected to the clutch. The cooling oil circuit is connected to the oil outlet of the main pressure regulating valve (1); The automatic oil pressure feedback circuit includes a shuttle valve (3). The oil outlet of the shuttle valve (3) is connected to the piston chamber of the main pressure regulating valve (1) through a throttle hole (4). The two oil inlets of the shuttle valve (3) are respectively connected in parallel to the two clutch control branches.

2. The hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The clutch control oil circuit includes an electromagnetic reversing valve (2), the oil inlet of the electromagnetic reversing valve (2) is connected to the oil outlet of the adjustable flow valve (5), the two oil outlets of the electromagnetic reversing valve (2) are respectively connected to the oil inlet of the corresponding clutch control branch, and the oil outlet of the clutch control branch is connected to the clutch oil chamber.

3. The hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The cooling oil circuit is connected to the inlet of the overflow valve (6) in the middle, and the outlet of the overflow valve (6) is connected to the oil tank. The overflow valve (6) is used to allow the hydraulic oil in the cooling oil circuit that exceeds the set oil pressure to flow back into the oil tank.

4. The hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The oil supply circuit has a monitoring port connected in parallel at the oil inlet end for monitoring the oil pressure of the main oil circuit.

5. A hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The clutch control branch has a monitoring port connected in parallel to the oil outlet side for monitoring clutch oil pressure.

6. The hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The cooling oil circuit is connected in parallel with a monitoring port for monitoring the oil pressure of the cooling oil circuit.

7. A hydraulic control system for a small marine gearbox according to claim 1, characterized in that: The cooling oil circuit is connected in parallel with a monitoring port for monitoring the oil temperature of the cooling oil circuit.

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