CN110329483B - Closed hydraulic system of full-rotating rudder propeller - Google Patents

Closed hydraulic system of full-rotating rudder propeller Download PDF

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Publication number
CN110329483B
CN110329483B CN201910472877.3A CN201910472877A CN110329483B CN 110329483 B CN110329483 B CN 110329483B CN 201910472877 A CN201910472877 A CN 201910472877A CN 110329483 B CN110329483 B CN 110329483B
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oil
port
communicated
valve
module
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CN110329483A (en
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张三喜
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Wuhan Marine Machinery Plant Co Ltd
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Wuhan Marine Machinery Plant Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H25/00Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06Steering by rudders
    • B63H25/08Steering gear
    • B63H25/14Steering gear power assisted; power driven, i.e. using steering engine
    • B63H25/26Steering engines
    • B63H25/28Steering engines of fluid type
    • B63H25/30Steering engines of fluid type hydraulic

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a closed hydraulic system of a full-rotation rudder propeller, and belongs to the technical field of full-rotation rudder propellers. The hydraulic power anti-reverse rotation device comprises a motor M, a hydraulic power module and an anti-reverse rotation module; motor M includes ports a1 and B1; the hydraulic power module comprises an A2 port and a B2 port; the anti-reverse module comprises a first hydraulic control direction valve, a second hydraulic control direction valve, a first one-way valve and a second one-way valve, wherein an oil inlet of the first hydraulic control direction valve is communicated with an A1 port, an oil outlet of the first hydraulic control direction valve is communicated with an A2 port, an oil inlet of the first one-way valve is communicated with an A2 port, and an oil outlet of the first one-way valve is communicated with an A1 port; an oil inlet of the second hydraulic directional valve is communicated with the port B1, an oil outlet of the second hydraulic directional valve is communicated with the port B2, an oil inlet of the second one-way valve is communicated with the port B2, and an oil outlet of the second one-way valve is communicated with the port B1. The closed hydraulic system provided by the invention can ensure that the swing angle of the swing mechanism of the full-swing rudder propeller is stable, and simultaneously can ensure the working efficiency of the hydraulic system.

Description

Closed hydraulic system of full-rotating rudder propeller
Technical Field
The invention relates to the technical field of full-rotation rudder propellers, in particular to a closed hydraulic system of a full-rotation rudder propeller.
Background
The full-rotation rudder propeller device can provide thrust of all-directional vectors and is important equipment of dynamic positioning engineering ships or platforms. However, under the action of ocean waves and ocean currents, the slewing mechanism of the full-slewing rudder propeller is pushed, so that the stability of the slewing angle of the slewing mechanism cannot be guaranteed. Therefore, a balancing valve is usually provided in the hydraulic system to ensure that the swing mechanism is not affected by external forces.
However, the balance valve consumes a large amount of power when the hydraulic system operates, and reduces the operating efficiency of the hydraulic system.
Disclosure of Invention
The embodiment of the invention provides a closed hydraulic system of a full-rotation rudder propeller, which can ensure that the swing angle of a rotation mechanism of the full-rotation rudder propeller is stable and the working efficiency of the hydraulic system can be ensured. The technical scheme is as follows:
the invention provides a closed hydraulic system of a full-rotation rudder propeller, which comprises a motor M, a hydraulic power module and an anti-reverse module;
the hydraulic motor M comprises a port A1 and a port B1; the hydraulic power module comprises a port A2 and a port B2;
the anti-reverse module comprises a first hydraulic control directional valve V3-1, a second hydraulic control directional valve V3-2, a first check valve V3-3 and a second check valve V3-4,
an oil inlet of the first hydraulic control directional valve V3-1 is communicated with an A1 port, an oil outlet of the first hydraulic control directional valve V3-1 is communicated with an A2 port, an oil inlet of the first check valve V3-3 is communicated with an A2 port, and an oil outlet of the first check valve V3-3 is communicated with an A1 port;
an oil inlet of the second hydraulic control directional valve V3-2 is communicated with a port B1, an oil outlet of the second hydraulic control directional valve V3-2 is communicated with a port B2, an oil inlet of the second check valve V3-4 is communicated with a port B2, and an oil outlet of the second check valve V3-4 is communicated with a port B1.
Further, the hydraulic power module comprises a diesel engine and a closed variable plunger pump, wherein a belt pulley of the diesel engine drives the closed variable plunger pump to output hydraulic oil from an A2 port or a B2 port.
Further, the closed variable plunger pump includes a main pump P2.1 and an oil replenishment pump P2.2, and the oil replenishment pump P2.2 is used for replenishing oil to the main pump P2.1.
Further, the closed hydraulic system also comprises a filtering module, wherein the filtering module comprises a filter F4-1, a one-way valve C4-1, a one-way valve C4-2 and a stop valve K2;
an oil inlet of the stop valve K2 is communicated with an Fe port of the hydraulic power module, a first oil outlet of the stop valve K2 is communicated with an oil inlet of the filter F4-1, an oil outlet of the filter F4-1 is communicated with an oil inlet of a one-way valve C4-1, and an oil outlet of the one-way valve C4-1 is communicated with a Fa port of the hydraulic power module;
an oil inlet of the one-way valve C4-2 is communicated with a first oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-2 is communicated with a Fa port of the hydraulic power module.
Further, the filtration module also comprises a filter F4-2, a one-way valve C4-3 and a one-way valve C4-4;
a second oil outlet of the stop valve K2 is communicated with the filter F4-2, an oil outlet of the filter F4-2 is communicated with an oil inlet of a one-way valve C4-3, and an oil outlet of the one-way valve C4-3 is communicated with a Fa port of the hydraulic power module;
an oil inlet of the one-way valve C4-4 is communicated with a second oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-4 is communicated with a Fa port of the hydraulic power module.
Further, the filter F4-1 and the filter F4-2 are paper filter elements or glass fiber filter elements.
Furthermore, closed hydraulic system still includes the cooling module, the cooling module sets up between hydraulic power module 'S T mouth and the oil tank of mending, the hydraulic oil warp of T mouth outflow in the oil tank of mending flows into after the cooling module cooling, hydraulic power module' S S mouth with the oil tank of mending is connected, oil pump P2.2 is followed through the S mouth the cooling oil is inhaled in the oil tank of mending.
Further, the cooling module includes a condenser.
Further, the closed hydraulic system also comprises an oil mixing module, the oil mixing module comprises a stop valve K1, one end of the stop valve K1 is communicated with the A1 port, and the other end of the stop valve K1 is communicated with the B1 port.
Further, the first pilot-operated direction valve V3-1 and the second pilot-operated direction valve V3-2 are two-position and two-way valves.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
by arranging the anti-reverse module, when the hydraulic power module works, the anti-reverse module is in a pump working condition mode: the hydraulic oil output by the hydraulic power module enters the anti-reverse module through the port A2, enters the motor M through the ports V3-3 and A1 and flows out of the port B1 of the motor M, the second hydraulic control direction valve V3-2 is opened under the action of the hydraulic oil, the oil return port of the motor M is unblocked at the moment, and the motor M can work under the driving of high-pressure oil. When pressure oil of the hydraulic power module enters the anti-reverse module through the oil inlet B2, the pressure oil enters the motor M through the second one-way valve V3-4 and the opening B2 and flows out of the opening A2 of the motor M, the first hydraulic control directional valve V3-1 is opened under the action of the pressure oil, the oil return opening of the motor M is unblocked at the moment, and the motor M can work under the driving of high-pressure oil. Under the pump working condition mode, the power consumed by the anti-reverse module is very small, and the working efficiency of the hydraulic system can be ensured. When the hydraulic power module stops working, ocean waves and ocean currents push the motor M to rotate, the motor M temporarily plays a role of a pump, and the anti-reverse module is in a working condition mode of the motor M at the moment: when the pressure oil generated by the motor M enters the anti-reverse module from the port A1, the oil cannot pass through the first pilot-controlled directional valve V3-1 and the first check valve V3-3, and the motor M cannot rotate. When the pressure oil generated by the motor M enters the anti-reverse module from the port B1, the oil cannot pass through the second pilot-controlled directional valve V3-2 and the second check valve V3-4, and the motor M cannot rotate. Therefore, under the constraint of the anti-reverse module, the motor M cannot rotate, so that the pivot angle of the full-rotation rudder propeller device can be kept unchanged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a closed hydraulic system of a rudder propeller according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a closed hydraulic system of a rudder propeller, according to an embodiment of the present invention, as shown in fig. 1, the closed hydraulic system includes a motor M, a hydraulic power module 200, and an anti-reverse module 300.
The hydraulic motor M includes ports a1 and B1, and the hydraulic power module 200 includes ports a2 and B2.
The anti-reverse module 300 includes a first pilot operated direction valve V3-1, a second pilot operated direction valve V3-2, a first check valve V3-3, and a second check valve V3-4.
An oil inlet of a first hydraulic control directional valve V3-1 is communicated with an A1 port, an oil outlet of a first hydraulic control directional valve V3-1 is communicated with an A2 port, an oil inlet of a first check valve V3-3 is communicated with an A2 port, and an oil outlet of a first check valve V3-3 is communicated with an A1 port.
An oil inlet of the second hydraulic control directional valve V3-2 is communicated with the port B1, an oil outlet of the second hydraulic control directional valve V3-2 is communicated with the port B2, an oil inlet of the second check valve V3-4 is communicated with the port B2, and an oil outlet of the second check valve V3-4 is communicated with the port B1.
According to the embodiment of the invention, by arranging the anti-reverse module, when the hydraulic power module works, the anti-reverse module is in a pump working condition mode: the hydraulic oil output by the hydraulic power module enters the anti-reverse module through the port A2, enters the motor M through the ports V3-3 and A1 and flows out of the port B1 of the motor M, the second hydraulic control direction valve V3-2 is opened under the action of the hydraulic oil, the oil return port of the motor M is unblocked at the moment, and the motor M can work under the driving of high-pressure oil. When pressure oil of the hydraulic power module enters the anti-reverse module through the oil inlet B2, the pressure oil enters the motor M through the second one-way valve V3-4 and the opening B2 and flows out of the opening A2 of the motor M, the first hydraulic control directional valve V3-1 is opened under the action of the pressure oil, the oil return opening of the motor M is unblocked at the moment, and the motor M can work under the driving of high-pressure oil. Under the pump working condition mode, the power consumed by the anti-reverse module is very small, and the working efficiency of the hydraulic system can be ensured.
When the hydraulic power module stops working, ocean waves and ocean currents push the motor M to rotate, the motor M temporarily plays a role of a pump, and the anti-reverse module is in a working condition mode of the motor M at the moment: when the pressure oil generated by the motor M enters the anti-reverse module from the port A1, the oil cannot pass through the first pilot-controlled directional valve V3-1 and the first check valve V3-3, and the motor M cannot rotate. When the pressure oil generated by the motor M enters the anti-reverse module from the port B1, the oil cannot pass through the second pilot-controlled directional valve V3-2 and the second check valve V3-4, and the motor M cannot rotate. Therefore, under the constraint of the anti-reverse module, the motor M cannot rotate, so that the pivot angle of the full-rotation rudder propeller device can be kept unchanged.
In the present embodiment, the first pilot directional valve V3-1 and the second pilot directional valve V3-2 are two-position, two-way valves.
Further, the hydraulic power module 200 includes a diesel engine 210 and a closed variable displacement pump, wherein a pulley of the diesel engine drives the closed variable displacement pump to output hydraulic oil from a port a2 or a port B2.
Further, the closed variable plunger pump includes a main pump P2.1 and an oil replenishment pump P2.2, and the oil replenishment pump P2.2 is used for replenishing oil to the main pump P2.1.
Optionally, the closed variable plunger pump further comprises a three-position four-way valve V2-1, a valve V2-2, an overflow valve V2-3, an overflow valve V2-4, a check valve V2-5, a check valve V2-6, an overflow valve V2-7, an overflow valve V2-8 and a shuttle valve V2-9. This is the conventional structure and the present invention will not be described in detail herein.
Further, the closed hydraulic system further comprises a filter module 400, wherein the filter module 400 comprises a filter F4-1, a check valve C4-1, a check valve C4-2 and a stop valve K2.
An oil inlet of the stop valve K2 is communicated with an Fe port of the hydraulic power module 200, a first oil outlet of the stop valve K2 is communicated with an oil inlet of a filter F4-1, an oil outlet of the filter F4-1 is communicated with an oil inlet of a one-way valve C4-1, and an oil outlet of the one-way valve C4-1 is communicated with an Fa port of the hydraulic power module 200.
An oil inlet of the one-way valve C4-2 is communicated with a first oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-2 is communicated with a Fa port of the hydraulic power module 200.
Various impurities in the hydraulic system may be filtered by providing the filter module 400.
Further, the filtration module 400 also includes a filter F4-2, a check valve C4-3, and a check valve C4-4.
The second oil outlet of the stop valve K2 is communicated with a filter F4-2, the oil outlet of the filter F4-2 is communicated with the oil inlet of a one-way valve C4-3, and the oil outlet of the one-way valve C4-3 is communicated with the Fa port of the hydraulic power module 200.
An oil inlet of the one-way valve C4-4 is communicated with a second oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-4 is communicated with a Fa port of the hydraulic power module 200.
By providing the filter module 400 in a structure including two filters, when one of the filters is damaged, hydraulic oil in the hydraulic system can be switched to the other filter by switching the cutoff valve K2, thereby facilitating maintenance of the hydraulic system.
Optionally, filters F4-1 and F4-2 are paper cartridge filters or glass fiber cartridge filters.
Further, closed hydraulic system still includes cooling module 500, and cooling module 500 sets up between hydraulic power module 200 'S the oil discharge port T mouth and the oil tank of mending, and in the hydraulic oil that the T mouth flowed out flowed in the oil tank of mending after cooling module 500 cools off, hydraulic power module 200' S S mouth and the oil tank of mending are connected, and oil pump P2.2 absorbs the cooling oil through S mouth in the oil tank of mending 200. Through setting up cooling module 500, can be with the hydraulic oil cooling among the hydraulic system, prevent that the hydraulic oil temperature among the hydraulic system is too high, and then can ensure hydraulic system's normal work.
Further, the cooling module 500 includes a condenser 510.
Optionally, the cooling module 500 further includes a check valve V5, the check valve V5 is connected in parallel to two sides of the condenser 510, and an oil inlet of the check valve V5 is communicated with the oil outlet T of the hydraulic power module 200.
Further, closed hydraulic system still includes cluster oil module 100, and cluster oil module 100 includes stop valve K1, and the one end and the A1 mouth intercommunication of stop valve K1, the other end and the B1 mouth intercommunication of stop valve K1. When opening stop valve K1, hydraulic power module 200's A2 mouth and B2 mouth intercommunication can conveniently clean hydraulic system's pipeline, makes hydraulic system's cleanliness satisfy the requirement, simultaneously, when stop valve K1, can also make motor M be in the free wheel operating mode, makes motor M rotate under the exogenic action.
As shown in fig. 1, the oil distributing module 100 is disposed in front of the anti-reverse module 300, and because a certain spring force exists in the check valve in the anti-reverse module 300, when the motor M is overhauled, oil in the management of the hydraulic system can be prevented from leaking.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The closed hydraulic system of the full-rotation rudder propeller is characterized by comprising a motor M, a hydraulic power module (200) and an anti-reverse module (300);
the motor M comprises ports A1 and B1; the hydraulic power module (200) includes ports A2 and B2;
the anti-reverse module (300) comprises a first hydraulic control directional valve V3-1, a second hydraulic control directional valve V3-2, a first check valve V3-3 and a second check valve V3-4,
an oil inlet of the first hydraulic control directional valve V3-1 is communicated with an A1 port, an oil outlet of the first hydraulic control directional valve V3-1 is communicated with an A2 port, an oil inlet of the first check valve V3-3 is communicated with an A2 port, and an oil outlet of the first check valve V3-3 is communicated with an A1 port;
an oil inlet of the second hydraulic control directional valve V3-2 is communicated with a port B1, an oil outlet of the second hydraulic control directional valve V3-2 is communicated with a port B2, an oil inlet of the second check valve V3-4 is communicated with a port B2, and an oil outlet of the second check valve V3-4 is communicated with a port B1;
the closed hydraulic system further comprises an oil mixing module (100), the oil mixing module (100) comprises a stop valve K1, one end of the stop valve K1 is communicated with the A1 port, the other end of the stop valve K1 is communicated with the B1 port, and the oil mixing module (100) is arranged between the anti-reverse module (300) and the motor (M).
2. The closed hydraulic system according to claim 1, characterized in that the hydraulic power module (200) comprises a diesel engine and a closed variable displacement piston pump, and a pulley of the diesel engine drives the closed variable displacement piston pump to output hydraulic oil from a port a2 or a port B2.
3. The closed hydraulic system according to claim 2, characterized in that the closed variable piston pump comprises a main pump P2.1 and a supplementary oil pump P2.2, the supplementary oil pump P2.2 being used for supplementing oil to the main pump P2.1.
4. The closed hydraulic system according to claim 3, further comprising a filter module (400), the filter module (400) comprising a filter F4-1, a check valve C4-1, a check valve C4-2 and a shut-off valve K2;
an oil inlet of the stop valve K2 is communicated with an Fe port of the hydraulic power module (200), a first oil outlet of the stop valve K2 is communicated with an oil inlet of the filter F4-1, an oil outlet of the filter F4-1 is communicated with an oil inlet of a one-way valve C4-1, and an oil outlet of the one-way valve C4-1 is communicated with an Fa port of the hydraulic power module (200);
an oil inlet of the one-way valve C4-2 is communicated with a first oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-2 is communicated with a Fa port of the hydraulic power module (200).
5. The closed hydraulic system according to claim 4, wherein the filter module (400) further comprises a filter F4-2, a check valve C4-3, and a check valve C4-4;
a second oil outlet of the stop valve K2 is communicated with the filter F4-2, an oil outlet of the filter F4-2 is communicated with an oil inlet of a one-way valve C4-3, and an oil outlet of the one-way valve C4-3 is communicated with a Fa port of the hydraulic power module (200);
an oil inlet of the one-way valve C4-4 is communicated with a second oil outlet of the stop valve K2, and an oil outlet of the one-way valve C4-4 is communicated with a Fa port of the hydraulic power module (200).
6. The closed hydraulic system according to claim 4, wherein the filter F4-1 and the filter F4-2 are paper filter elements or glass fiber filter elements.
7. The closed hydraulic system according to claim 3, further comprising a cooling module (500), wherein the cooling module (500) is disposed between a T-port of the hydraulic power module (200) and an oil supplementing tank, hydraulic oil flowing out from the T-port flows into the oil supplementing tank after being cooled by the cooling module (500), an S-port of the hydraulic power module (200) is connected with the oil supplementing tank, and the oil supplementing pump P2.2 sucks cooling oil from the oil supplementing tank through the S-port.
8. The closed hydraulic system according to claim 7, characterized in that the cooling module (500) comprises a condenser.
9. The closed hydraulic system as claimed in claim 1, wherein the first pilot-operated direction valve V3-1 and the second pilot-operated direction valve V3-2 are both two-position, two-way valves.
CN201910472877.3A 2019-05-31 2019-05-31 Closed hydraulic system of full-rotating rudder propeller Active CN110329483B (en)

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CN110329483B true CN110329483B (en) 2020-10-09

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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156411B (en) * 2015-10-21 2017-05-24 中船重工重庆智能装备工程设计有限公司 Novel hydraulic servo system of full-rotating rudder propeller
CN205101322U (en) * 2015-10-21 2016-03-23 中船重工重庆智能装备工程设计有限公司 Novel rudder oar hydraulic pressure servo turns around entirely
CN106005342B (en) * 2016-06-29 2018-02-02 四川是钢实业有限公司 Full gondola hydraulic pusher pleasure-boat
CN205906937U (en) * 2016-07-19 2017-01-25 成都源云机械有限公司 Single track loop wheel machine car hydraulic drive system
CN107628217A (en) * 2016-07-19 2018-01-26 成都源云机械有限公司 Gondola turns round fluid power system
JP6838732B2 (en) * 2016-12-21 2021-03-03 株式会社 神崎高級工機製作所 Deceleration reverser
WO2019001401A1 (en) * 2017-06-26 2019-01-03 刘素华 Advance and retreat automatic control method based on hydraulic sensing conversion and advance and retreat automatic control system based on hydraulic sensing conversion
CN109812456A (en) * 2017-11-20 2019-05-28 成都多明科技有限公司 Gondola turns round fluid power system
CN109236770A (en) * 2018-09-28 2019-01-18 四川耐特阀门有限公司 A kind of gondola revolution fluid power system

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