CN112811332A

CN112811332A - Hydraulic lifeboat winch

Info

Publication number: CN112811332A
Application number: CN202110143636.1A
Authority: CN
Inventors: 周小宝; 吴英华; 赵广齐; 周丹; 戎正林; 王迪; 闫春旭
Original assignee: NINGBO XINHONG HYDRAULIC CO Ltd
Current assignee: NINGBO XINHONG HYDRAULIC CO Ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-05-18

Abstract

The invention discloses a hydraulic lifeboat winch, which is characterized by comprising: the rope winding mechanism comprises a hydraulic valve group, a rope winding mechanism, a hydraulic power mechanism and a manual power mechanism; the hydraulic power mechanism comprises: the rope winding device comprises a hydraulic motor and a first transmission device, wherein the hydraulic motor is in transmission connection with a rope winding mechanism through the first transmission device; the manual power mechanism includes: the manual lifting device, the braking speed limiting device, the second transmission device and the hydraulic clutch device are arranged on the hydraulic clutch device; the manual hoisting device is in transmission connection with the rope winding mechanism through the braking speed limiting device, the second transmission device and the hydraulic clutch device in sequence; the hydraulic valve group comprises a high-pressure ball valve, and high-pressure oil cavities and low-pressure oil cavities of the hydraulic motor are communicated through the high-pressure ball valve. According to the hydraulic life-saving winch disclosed by the invention, when a lifeboat is released, the high-pressure and low-pressure oil cavities of the hydraulic motor are communicated through the high-pressure ball valve to realize idling of the hydraulic motor, and the hydraulic clutch device is connected with the braking speed limiting device to realize control of the maximum releasing speed, so that the lifeboat is freely and quickly released.

Description

Hydraulic lifeboat winch

Technical Field

The invention relates to the technical field of ship lifesaving equipment, in particular to a hydraulic lifeboat winch.

Background

With the continuous progress of science and technology, the living standard of people is continuously improved, and ship transportation and sea play are common, however, when a ship runs on the sea, the ship is bound to encounter stormy waves or more complex climatic conditions, so that the ship is generally concerned about the safety or how to deal with the risks, and on the basis, the ship lifesaving equipment plays a very important role in lifting. The lifeboat winch is main life-saving equipment for ships and various offshore platforms, and is mainly used for winding and unwinding a stranded rope for a boat lifting frame. When an emergency occurs, the lifeboat and the person on the lifeboat are put down to the sea through the lifeboat winch, and the person can escape through the lifeboat.

Lifeboat winch in the existing market, its power mode mainly is the power unit that motor and handle combine, the motor is connected on same transmission shaft with the handle, provide power for the wiring mechanism through same master gear, lead to being the drive ratio of wiring mechanism transmission through the motor and the drive ratio of handle for the wiring mechanism transmission are identical completely, and because the speed of the relative manual rotation handle of people of motor speed will be fast, thereby use the motor to carry out the during operation, the lifeboat of putting down that the davit can be quick, and when people manually waved the handle, the speed that the lifeboat was put down to the davit just descends greatly, lead to wasting the valuable life-saving time of people under the emergency, and people also are difficult to reach the rotational speed the same with the motor. When an emergency occurs, the power source of the lifeboat may fail to function due to failure, and at the moment, the lifeboat also needs to be quickly lifted and lowered in an effective manner.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a hydraulic lifeboat winch, a hydraulic motor and a manual lifting device are combined to be used as a power mechanism of the winch, when a lifeboat descends, the lifeboat can be connected with a speed limiting mechanism through a hydraulic clutch device to realize the control of the maximum lowering speed, and high-pressure oil cavities and low-pressure oil cavities of the hydraulic motor are communicated through a high-pressure ball valve to realize idling, so that the lifeboat can be freely and quickly lowered.

Aiming at the problems, the invention adopts a technical scheme that: a hydraulic lifeboat winch is provided, comprising: the rope winding device comprises a hydraulic valve group, a brake device, a rope winding mechanism, a hydraulic power mechanism, a manual power mechanism and a hydraulic clutch device; the hydraulic power mechanism comprises: the hydraulic motor is in transmission connection with the rope winding mechanism through the first transmission device; the hydraulic clutch device is used for clutch control between the rope winding mechanism and the brake device; the hydraulic valve group is used for providing hydraulic control for the hydraulic motor and the hydraulic clutch device, the hydraulic valve group comprises a high-pressure ball valve, and high-pressure oil cavities and low-pressure oil cavities of the hydraulic motor can be communicated through the high-pressure ball valve.

Further, the manual power mechanism comprises: the manual lifting device, the second transmission device and the third transmission device; the manual lifting device is connected with the rope winding mechanism in a transmission mode through the third transmission device, the braking device, the second transmission device and the hydraulic clutch device in sequence.

Furthermore, a speed limiting mechanism is arranged in the braking device, and the speed limiting mechanism limits the maximum lowering speed of the rope winding mechanism when the rope winding mechanism is connected with a heavy object to be freely lowered.

Furthermore, the hydraulic clutch device comprises a clutch shell, a clutch oil cylinder body, a static friction plate and a dynamic friction plate, wherein the clutch shell is fixedly connected with the rope winding mechanism, the static friction plate is connected with the clutch shell, and the dynamic friction plate is connected with the braking device through a main shaft.

Further, the rope winding mechanism comprises a winding drum; the first transmission device comprises a pinion connected with the power output end of the hydraulic motor and a gear ring fixedly connected with the winding drum.

Further, the second transmission device comprises a planetary reducer, the input end of the planetary reducer is connected with the braking device, and the output end of the planetary reducer is connected with the hydraulic clutch device; the third transmission device comprises a hand-operated gear box, the input end of the hand-operated gear box is connected with the manual lifting device, and the output end of the hand-operated gear box is connected with the braking device.

Furthermore, the braking device is provided with a manual trigger mechanism, and the braking release and the braking trigger control of the winch are realized through the manual trigger mechanism.

Furthermore, the hydraulic clutch device and the planetary reducer are integrally installed inside the rope winding mechanism. Through the arrangement, the overall structure of the hydraulic winch is more compact.

The invention has the beneficial effects that: 1. the power lifting mode of the hydraulic motor is combined with the manual lifting mode, and two power input modes are provided for the winding drum; 2. the high-pressure oil cavity and the low-pressure oil cavity of the hydraulic motor are communicated through the high-pressure ball valve, so that when the winding drum is freely lowered, idling of the hydraulic motor is realized; 3. the brake speed limiting device realizes the maximum speed control of the free lowering of the lifeboat and improves the safety performance.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is a hydraulic schematic of an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a braking speed limiting device in the embodiment of the invention;

FIG. 5 is a right side view of FIG. 5;

FIG. 6 is a cross-sectional view of section E-E of FIG. 4;

fig. 7 is a sectional view of section F-F in fig. 4.

Detailed Description

The technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more readily understood by those skilled in the art, and thus the scope of the present invention is more clearly and clearly defined.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, a winch for a hydraulic lifeboat according to an embodiment of the present invention includes: the hydraulic brake device comprises a bottom plate 1, a left frame 2, a right frame 12, a hydraulic motor 6, a hydraulic valve group 5, a winding drum 3, a hydraulic clutch, a gear box 11, a brake speed limiting device 13, a hand gear box 14 and a handle 17.

The power output shaft of the hydraulic motor 6 is connected with the gear 7 through a spline to rotate, the gear 7 is meshed with the gear ring 8 to drive the gear ring 8 to rotate, the gear ring 8 is fixed inside the winding drum 3 through a taper pin, and the hydraulic motor 6 drives the winding drum 3 to rotate through the meshing of the gear 7 and the gear ring 8 to generate torque, so that the automatic power input of the winch is realized.

The handle 17 is in transmission connection with the winding drum 3 through the hand gear box 14, the braking speed limiting device 13, the gear box 11 and the hydraulic clutch in sequence, and the handle 17 drives the winding drum 3 to rotate to generate torque through power transmission of the hand gear box 14, the braking speed limiting device 13, the gear box 11 and the hydraulic clutch in sequence, so that manual power input of the winch is achieved.

The hydraulic clutch is used for realizing clutch control between the winding drum 3 and the braking speed limiting device 13, the winding drum 3 is fixedly connected with the clutch shell 9 through a screw, and a dynamic friction plate 16 of the hydraulic clutch is connected with the main shaft 4; the gear box 11 is a III-grade planetary reducer, the other end of the main shaft 4 is connected with the output end of a planet carrier of the gear box 11 through a spline, the input end of a sun gear of the gear box 11 is connected with a braking speed limiting device 13, and the braking speed limiting device 13 is provided with manual release handles 13-17; the hand-operated gear box 14 comprises a large gear 21 and a small gear 22 which are meshed with each other, the large gear 21 is in transmission connection with the braking speed limiting device 13, and the small gear 21 is in transmission connection with the handle 17.

The hydraulic valve group 5 is used for controlling oil inlet and outlet of the hydraulic motor 6 and the hydraulic clutch, please refer to fig. 3, which is a hydraulic schematic diagram of the hydraulic motor 6 of the present invention, the hydraulic valve group 5 includes a high-pressure ball valve 23, the high-pressure ball valve 23 is communicated with high and low pressure oil chambers of the hydraulic motor 6, when the winding drum 3 is freely lowered, the high and low pressure oil chambers of the hydraulic motor 6 are communicated by toggling the control handle 20, and the hydraulic motor 6 realizes idle rotation.

Referring to fig. 4-7, the limit braking device 13 of the present invention specifically includes: the brake comprises a brake shell 13-1, a cover plate 13-10, a rotating shaft 13-8, a brake mechanism and a speed limiting mechanism.

The speed limiting mechanism comprises: the brake disc comprises a brake disc 13-2, a speed limiting block I13-11 a, a speed limiting block II 13-11b, a friction plate 13-12, a tension spring I13-13 a and a tension spring II 13-13 b; the brake disc 13-2 is fixedly arranged on the rotating shaft 13-8, one ends of the first speed limiting block 13-11a and the second speed limiting block 13-11b are hinged to the brake disc 13-2, the other ends of the first speed limiting block 13-11a and the second speed limiting block 13-11b are respectively provided with a friction plate 13-12, the first tension spring 13-13a is supported between the movable end of the first speed limiting block 13-11a and the hinged end of the second speed limiting block 13-11b, and the second tension spring 13-13b is supported between the movable end of the second speed limiting block 13-11b and the hinged end of the first speed limiting block; when the rotating shaft 13-8 rotates, the brake disc 13-2 is driven to rotate along with the rotating shaft, and the two speed limiting blocks arranged on the brake disc 13-2 swing towards the inner wall of the brake shell 13-1 under the action of centrifugal force, so that the friction plate 13-12 contacts with the inner wall of the brake shell 13-1 to generate friction force, and the speed limiting function is achieved.

The brake mechanism includes: the brake comprises a manual release handle 13-17, a spline housing 13-7, a cam body 13-6, a brake ring 13-5, a spring 13-16, a stop pin 13-4 and a brake pad 13-3; the cam body 13-6 is movably arranged on the rotating shaft 13-8 through a needle bearing 13-14, and the brake ring 13-5 is arranged on the cam body 13-6; the manual release handle 13-17 is arranged on the spline sleeve 13-7, the cam body 13-6 is provided with a spline through a screw 13-9, and the brake pad 13-3 is arranged on the brake ring 13-5 through a screw; a groove 13-501 is arranged on the brake ring 13-5 along the rotation direction of the brake ring, a stop pin 13-4 is arranged on the brake shell 13-1, and the brake ring 13-5 realizes the limit in the rotation direction through the stop pin 13-4; the spring 13-16 is supported between the spline housing 13-7 and the cover plate 13-10.

The braking speed limiting device 13 of the present invention is configured such that the braking state is manually released: firstly, the manual release handle 13-17 is pulled (from the position A to the position B in the figure), the manual release handle 13-17 drives the spline housing 13-7 to rotate, the spline housing 13-7 is locked with the cam body 13-6 through the spline so as to drive the cam body 13-6 to rotate, the cam body 13-6 is engaged with the brake ring 13-5, the brake pad 13-3 is installed on the brake ring 13-5, so the cam body 13-6 rotates to drive the brake ring 13-5 and the brake pad 13-3 to rotate and simultaneously move towards the brake housing 13-1 along the radial direction, the brake pad 13-3 releases the brake disc 13-2, and the braking state is released.

When a braking measure is needed, the manual release handle 13-17 is released, the spline housing 13-7 and the manual release handle 13-17 are reset in a rotating mode under the action of the spring 13-16 (the position is returned to the position A from the position B in the figure), the spline housing 13-7 further drives the cam body 13-6 to rotate through the spline, therefore, the cam body 13-6 rotates to drive the brake ring 13-5 and the brake pad 13-3 to rotate and move towards the brake disc 13-2 along the radial direction at the same time, and the brake pad 13-3 is tightly held with the brake disc 13-2, so that braking control is achieved.

One end of the rotating shaft 13-8 is connected with the big gear 21 of the hand-operated gear box 14, and the other end is connected with the sun gear input end of the gear box 11, so that the power transmission from the hand-operated gear box 14 to the gear box 11 is realized.

When a hydraulic system works normally, the hydraulic motor 6 provides hydraulic power for the winch, hydraulic oil flows into the hydraulic motor 6 and the hydraulic clutch through the hydraulic valve group 5, at the moment, the hydraulic motor 6 works, the clutch oil cylinder body 10 is jacked open, the movable friction plate 16 is separated from the static friction plate 15, and the movable friction plate 16 is connected with the braking speed limiting device 13 through the main shaft 4, so that the winch is in a brake-off state at the moment. The hydraulic motor 6 drives the reel 3 to rotate by the meshing of the gear 7 and the ring gear 8 to generate torque. When the hydraulic motor 6 rotates forwards, the winding drum 3 controls the cable to ascend, so that the lifeboat is hoisted; the hydraulic motor 6 rotates reversely, and then the winding drum 3 controls the cable to be lowered, so that the lifeboat is lowered. Because the hydraulic clutch is open, the spool 3 is disconnected from the gear box 11, brake governor 13, hand gear box 14 and handle 17, all of which are inoperative.

When an emergency state occurs, the lifeboat needs to be quickly lowered, or the hydraulic power source is out of order and the winding drum needs to be manually controlled. Firstly, a control handle 20 of a high-pressure ball valve 23 is rotated by 90 degrees, the high-pressure ball valve 23 is opened to connect high-pressure and low-pressure oil chambers of a hydraulic motor 6, then a manual release handle 13-17 in a speed-limiting braking device 13 is pulled to separate a brake pad 13-3 from a brake disc 13-2, therefore, the winch is in a brake release state, the winding drum 3 can rotate freely and is lowered, a hydraulic system does not supply oil to the winch any more, high-pressure oil chambers and low-pressure oil chambers of the hydraulic motor 6 are communicated through the high-pressure ball valve 23 to realize idling, the hydraulic clutch is in a closed state, the movable friction plate 16 and the static friction plate 15 are tightly pressed by the clutch oil cylinder body 10, the clutch shell 9 drives the main shaft 4 to rotate through the static friction plate 15 and the movable friction plate 16, the other end of the main shaft 4 is connected with the output end of the planet carrier of the gear box 11 through a spline, and the input end of the sun gear of the gear box 11 is connected with. When the lifeboat is freely lowered, the winding drum 3 sequentially passes through the clutch shell 9, the static friction plate 15, the dynamic friction plate 16, the main shaft 4 and the gear box 11 to drive the rotating shaft 13-8 to rapidly rotate, and the speed limiting blocks 13-11a and 13-11b arranged on the brake disc 13-2 swing outwards under the action of centrifugal force while rotating, and contact with the inner wall of the brake shell 13-1 to generate friction force, so that the speed limiting effect is achieved. When the falling speed of the heavy object is too high and braking measures need to be taken, the manual release handle 13-17 is pulled, so that the brake pad 13-3 and the brake disc 13-2 are tightly held, braking is realized, and the lifeboat stops falling.

When the braking state needs to be relieved, the manual release handle 13-17 is pulled to rotate and reset under the action of the spring 13-16, so that the brake disc 13-2 is released by the brake pad 13-3, and the braking state is relieved.

When the hydraulic system works normally, the winch provides power through the hydraulic motor 6 to realize the ascending or descending of the lifeboat; when an emergency occurs, the reel 3 is connected with the braking speed limiting device 13 through the hydraulic clutch, the lifeboat is manually lifted up through the handle 17 and can be freely lowered under the action of gravity, and the braking speed limiting device 13 plays a role in braking and limiting the maximum lowering speed of a heavy object; when the winch is in a free lowering state, high-pressure oil cavities and low-pressure oil cavities of the hydraulic motor 6 are communicated through the high-pressure ball valve, so that idling of the hydraulic motor 6 is realized.

The reduction ratio between the gear 7 and the ring gear 8 is 76: 15 for decelerating the hydraulic motor 6; the reduction ratio of the gear box 11 is 64, the reduction ratio of the hand-cranking gear box 14 is 2.25, and the hand-cranking power for lifting the handle 17 is less than 160N through the arrangement.

The hydraulic lifeboat winch has the advantages of reasonable structure, stable and reliable work, convenient control and the like, and has good industrial application prospect.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A hydraulic lifeboat winch, comprising: the rope winding device comprises a hydraulic valve group, a brake device, a rope winding mechanism, a hydraulic power mechanism, a manual power mechanism and a hydraulic clutch device; the hydraulic power mechanism comprises: the hydraulic motor is in transmission connection with the rope winding mechanism through the first transmission device; the hydraulic clutch device is used for clutch control between the rope winding mechanism and the brake device; the hydraulic valve group is used for providing hydraulic control for the hydraulic motor and the hydraulic clutch device, the hydraulic valve group comprises a high-pressure ball valve, and high-pressure oil cavities and low-pressure oil cavities of the hydraulic motor are communicated through the high-pressure ball valve.

2. The hydraulic lifeboat winch of claim 1, wherein said manual power mechanism comprises: the manual lifting device, the second transmission device and the third transmission device; the manual lifting device is connected with the rope winding mechanism in a transmission mode through the third transmission device, the braking device, the second transmission device and the hydraulic clutch device in sequence.

3. The hydraulic lifeboat winch of claim 2, wherein a speed limiting mechanism is provided in said braking device, said speed limiting mechanism limiting the maximum lowering speed of said rope winding mechanism when a weight is freely lowered while connected thereto.

4. The hydraulic lifeboat winch according to claim 1, wherein said hydraulic clutch device comprises a clutch housing, a clutch cylinder, a static friction plate and a dynamic friction plate, said clutch housing is fixedly connected with said rope winding mechanism, said static friction plate is connected with said clutch housing, and said dynamic friction plate is connected with said brake device through a main shaft.

5. The hydraulic lifeboat winch of claim 1, wherein said rope winding mechanism comprises a drum; the first transmission device comprises a pinion connected with the power output end of the hydraulic motor and a gear ring fixedly connected with the winding drum.

6. The hydraulic lifeboat winch of claim 2, wherein said second transmission comprises a planetary reducer, an input of said planetary reducer is connected to said brake device, and an output of said planetary reducer is connected to said hydraulic clutch device; the third transmission device comprises a hand-operated gear box, the input end of the hand-operated gear box is connected with the manual lifting device, and the output end of the hand-operated gear box is connected with the braking device.

7. The hydraulic lifeboat winch according to claim 1 or 3, wherein said brake device is provided with a manual trigger mechanism, by which the winch is released from braking and controlled to trigger braking.

8. The hydraulic lifeboat winch of claim 5, wherein said hydraulic clutch device and said planetary reducer are integrally mounted inside said rope winding mechanism.