CN214648965U - Multifunctional ship shaft brake device - Google Patents

Multifunctional ship shaft brake device Download PDF

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CN214648965U
CN214648965U CN202121030799.0U CN202121030799U CN214648965U CN 214648965 U CN214648965 U CN 214648965U CN 202121030799 U CN202121030799 U CN 202121030799U CN 214648965 U CN214648965 U CN 214648965U
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brake
shaft
unit
axle
hydraulic
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CN202121030799.0U
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肖怀兵
曹冕
肖常昆
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Abstract

The utility model discloses a multi-functional boats and ships axle device of stopping, including electric control unit, power hydraulic unit and host computer unit, electric control unit is connected power hydraulic unit and host computer unit through hydraulic pressure union coupling with power hydraulic unit electricity, and electric control unit realizes the automation of boats and ships through control power hydraulic unit hydrovalve control host computer unit and stops axle, dish axle, lock axle. The utility model discloses it is integrated as an organic whole with boats and ships shafting three device of stopping, dish axle, lock axle, realized that a device is accomplished and is stopped the three function of axle, dish axle, lock axle to realize automatic braking, dish axle, lock axle function through the electric automatization control, solved the artifical static braking of solving and needing artifical to boats and ships shafting under having rotational speed state shafting braking. And through the design of the disc shaft and the double oil cylinders, the problem of poor stability of the disc shaft of the single oil cylinder is solved.

Description

Multifunctional ship shaft brake device
Technical Field
The utility model relates to a marine machinery technical field especially relates to a multi-functional boats and ships axle braking device.
Background
The shaft system of stopping of current boats and ships shafting, dish axle, lock axle device are 3 devices through manual operation that mutually independent, and the shaft system of stopping of current boats and ships is fixed through braked wheel and axle, tightens up the staple bolt outside the braked wheel through manual, makes it hold the braked wheel tightly, and staple bolt and brake base are fixed with the boats and ships hull to make the shafting fixed, irrotational. The existing shafting brake needs manual operation, the shafting can not be braked when rotating speed exists, and the shafting is braked only when the shafting is in a non-working (stopping) state.
The structure principle of the existing ship disc shaft device is as follows: the gear disc on the shaft is pried through a manual lever type shifting fork structure, so that the gear disc rotates to drive the shaft system to rotate.
The existing ship lock shaft is installed into a bolt type structure principle: insert the bolt through the manual work with the fixed gear dish round hole of axle or tooth's socket to fixed gear dish irrotational realizes the lock axle function.
The shaft braking, the disc shaft and the shaft locking devices of the conventional ship shafting are mutually independent devices, and all the devices need manual operation, so that time and labor are wasted. The existing ship shafting brake device cannot realize braking in a rotating speed state. The disc shaft device is very labor-intensive and very inefficient, e.g., it takes about 15 minutes to rotate the disc shaft once. The shaft locking device is very labor-intensive and inefficient. In the prior art, the shaft locking device is manually operated, the state of the shaft locking device needs to be checked manually before a marine main engine (engine) is started every time, a shaft locking bolt needs to be withdrawn manually, and the risk of damaging the marine engine is caused by negligence.
Disclosure of Invention
The utility model discloses a solve above problem, stop the axle with boats and ships shafting, the dish axle, the three device integration of lock axle is as an organic whole, three function more than a device passes through hydraulic pressure mechanism and realizes automatic braking, dish axle, lock axle function through electrical automation control. The problem that manual work cannot be solved, the shaft system is braked in a rotating speed state, and the ship shaft system needs manual static braking is solved. Through the design of the disc shaft and the double oil cylinders, the problem of poor stability of the disc shaft of the single oil cylinder is solved.
The utility model discloses a multi-functional boats and ships axle device of stopping, including electrical control unit, power hydraulic unit and host computer unit, electrical control unit is connected with power hydraulic unit electricity, power hydraulic unit passes through hydraulic line with the host computer unit and is connected, and electrical control unit control power hydraulic unit and host computer unit realize the automation of boats and ships and stop axle, dish axle, lock axle.
The utility model discloses a multi-functional boats and ships shaft brake device, the electrical control unit is including the control mainboard, photoelectric sensor, stroke sensor and the cabinet body, the control mainboard sets up in the cabinet is internal, on stroke sensor and photoelectric sensor were fixed in the base, the control mainboard passed through the data line with photoelectric sensor and stroke sensor and is connected.
The utility model discloses a multi-functional boats and ships shaft brake device, power hydraulic unit includes motor, hydraulic oil pump, hydraulic pressure valves and oil tank, motor, hydraulic pressure valves set up in the oil tank on, the hydraulic oil pump sets up in the oil tank, and the motor shaft is connected with hydraulic pressure valves oil pump spindle, and the hydraulic oil pump passes through hydraulic pressure pipeline A with the hydraulic pressure valves to be connected, and the hydraulic pressure valves passes through hydraulic pressure pipeline B and host computer unit connection.
The utility model discloses a multi-functional boats and ships shaft brake device, the host computer unit includes brake disc, U-shaped stopper, 2U-shaped stopper hydro-cylinders, U-shaped stopper fixing base, 2 dish axle hydro-cylinders, shaft locking device hydro-cylinders and base, the U-shaped stopper is fixed in the U-shaped stopper fixing base, U-shaped stopper fixing base contacts with the base, the base is fixed in boats and ships, the brake disc inserts in the U-shaped opening of U-shaped stopper, sets up the hydro-cylinder groove on U-shaped stopper both walls respectively, 2 the U-shaped stopper hydro-cylinder sets up in the hydro-cylinder groove, 2 shoes that are used for tightening the brake disc are respectively the back-buckling in 2U-shaped stopper piston rod top, set up the spring between shoes and the U-shaped stopper hydro-cylinder, 2 dish axle hydro-cylinder bottom is articulated with the base, and dish axle hydro-cylinder upper end is articulated with U-shaped stopper fixing base, brake disc tooth's socket is set up at even interval on the brake disc round edge, lock axle hydro-cylinder piston rod top sets up the bolt, the bolt cooperatees with brake disc tooth's socket, lock axle hydro-cylinder bottom mounting on the base.
The utility model relates to a multi-functional boats and ships shaft braking device, the advantage that has for prior art is:
1. the utility model optimizes and integrates 3 devices of a ship shaft system, such as a rotating speed brake shaft, a disc shaft and a lock shaft, into a whole device;
2. the problem that the ship cannot be solved in a manual state is solved, and the ship shaft is braked in a rotating speed state;
3. the manual plate shaft is time-consuming, labor-consuming and low in efficiency, and can be started by one key;
4. the manual shaft locking process is time-consuming and labor-consuming, and if the main engine is started in a shaft locking state due to manual negligence, the main engine of the ship is damaged. The utility model can lock the shaft by one key, and the main machine can not be started under the shaft locking state through the linkage control of the utility model and the main machine, so that the risk of damaging the main machine is reduced to zero;
5. the utility model discloses a two hydro-cylinder structures of dish axle make the stability reinforcing of boats and ships.
Drawings
Fig. 1 is a schematic structural view of a multifunctional ship brake device of the present invention;
FIG. 2 is a left side view of a structure of a multifunctional ship brake device of the present invention;
fig. 3 the utility model relates to a multi-functional boats and ships brake shaft device structure top view.
Description of the figures
1 … electric control unit 2 … power hydraulic unit 3 … hydraulic line B4 … U-shaped brake fixing seat
5 … disc axle oil cylinder 6 … U-shaped brake 7 … brake disc 8 … lock axle oil cylinder
9 … base 10 … brake rotor gullet.
Detailed Description
The multifunctional ship brake shaft device of the present invention will be described in further detail with reference to fig. 1 to 3 of the drawings.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
The utility model discloses a multi-functional boats and ships shaft brake device please refer to fig. 1 to fig. 3, including electric control unit 1, power hydraulic unit 2 and host computer unit, electric control unit 1 is connected with 2 electricity in the power hydraulic unit 2 passes through hydraulic pressure pipe 3 with the host computer unit to be connected, and electric control unit 1 controls power hydraulic unit 2 and host computer unit and realizes the automation of boats and ships and brake axle, dish axle, lock axle. The manual and automatic 2 modes are controlled by the electric control unit 1. When the switch is in an automatic gear, an external power supply supplies power, the power hydraulic unit 2 supplies hydraulic oil to the main unit through a hydraulic pipeline, and various oil cylinders in the main unit push respective equipment to complete automatic shaft braking, shaft coiling and shaft locking of the ship. The method specifically comprises the following steps: the electric control unit 1 controls a motor, a motor shaft is connected with a hydraulic oil pump shaft, so that the motor drives a hydraulic oil pump to work, oil is pressed to 2U-shaped brake oil cylinders through a hydraulic valve group, the 2U-shaped brake oil cylinders press oil to push shoe plates to press a brake disc 7, a rotating shaft is braked, and shafting braking is achieved. And then the hydraulic valve group presses oil to the disc shaft oil cylinder 5 to push the disc shaft oil cylinder 5 to extend to drive the brake disc 7 to do circular motion, when the brake disc 7 is at a certain position, the brake shoe is loosened, the reversing valve works, the disc shaft oil cylinder 5 retracts, the brake shoe is clamped again, and the disc shaft oil cylinder 5 repeats the last cycle action, so that the continuous disc shaft function is realized. When the photoelectric sensor detects that the brake disc 7 is at a certain position, the photoelectric sensor arranged on the base 9 transmits a signal to the electric control unit 1, the electric control unit 1 controls the disc shaft oil cylinder 5 in the host unit to stop working, the brake disc stops rotating, the stroke sensor arranged on the base 9 detects that the locking shaft bolt is not inserted into the brake disc tooth space 10 and transmits the signal to the electric control unit 1, the electric control unit 1 controls the power hydraulic unit 2 to supply oil or withdraw the oil to stop the disc shaft oil cylinder 5 in the host unit, the locking shaft oil cylinder 8 works, the locking shaft oil cylinder 8 extends, the locking shaft bolt is inserted into the brake disc tooth space 10, the stroke sensor detects that the locking shaft bolt is inserted into the brake disc tooth space 10 again and transmits a signal to the electric control unit 1, the electric control unit sends a shaft system to a whole ship driving control center to be in a locking shaft state and is in linkage control with a ship frame control center, the ship main engine and the shafting can not be started.
When the switch is in a manual gear, when a brake shaft button is pressed, the electric control unit 1 controls the motor, the motor shaft is connected with the hydraulic oil pump shaft, so that the motor drives the hydraulic oil pump to work, oil is pressed to the 2U-shaped brake oil cylinders through the hydraulic valve group, the 2U-shaped brake oil cylinders press oil to push the shoe to press the brake disc 7, the rotating shaft is braked, and the shafting brake is realized. When the reel button is pressed: the hydraulic valve group presses oil to the disc shaft oil cylinder 5 to push the disc shaft oil cylinder 5 to extend to drive the brake disc 7 to do circular motion, when the brake disc 7 is in a certain position, the brake shoe is loosened, the reversing valve works, the disc shaft oil cylinder 5 retracts, the brake shoe is clamped again, and the disc shaft oil cylinder 5 repeats the last cycle action, so that the continuous disc shaft function is realized. When the lock shaft button is pressed: the brake is started to clamp a brake disc, a disc shaft oil cylinder is started to work, the brake disc rotates under the driving of the disc shaft oil cylinder, at the moment, when the photoelectric sensor detects that the brake disc 7 is located at a certain position, the photoelectric sensor arranged on the base 9 transmits a signal to the electric control unit 1, the electric control unit 1 controls the disc shaft oil cylinder 5 in the host unit to stop working, the brake disc stops rotating, the stroke sensor arranged on the base 9 detects that a shaft locking bolt does not have the brake disc to be inserted into the tooth groove 10 and transmits a signal to the electric control unit 1, the electric control unit 1 controls the power hydraulic unit 2 to supply oil to the shaft locking oil cylinder, the shaft locking oil cylinder 8 works, the shaft locking oil cylinder 8 extends, the shaft locking bolt is inserted into the tooth groove 10 of the brake disc, and shaft locking is completed. The stroke sensor detects that the shaft locking bolt is inserted into the brake disc tooth groove 10 again, and transmits a signal to the electric control unit 1, the electric control unit sends out a shaft system to the whole ship driving control center in a shaft locking state, the shaft system is in linkage control with the ship frame control center, and a ship main engine (engine) and the shaft system cannot be started.
The utility model discloses a multi-functional boats and ships shaft brake device please refer to fig. 1 to fig. 3, the utility model discloses a multi-functional boats and ships shaft brake device, electrical control unit 1 is including control mainboard, photoelectric sensor, stroke sensor and the cabinet body, the control mainboard sets up in the cabinet is internal, on stroke sensor and photoelectric sensor were fixed in the base, the control mainboard passed through the data line with photoelectric sensor and stroke sensor and was connected. The photoelectric sensor is used for detecting the position of the brake rotor tooth grooves 10 on the brake rotor 7, and when the photoelectric sensor detects that the brake rotor tooth grooves 10 are in proper positions, the position signals are transmitted to a control main board of the electric control unit 1 through data lines. And when the control main board receives the signal of the photoelectric sensor, the disc shaft oil cylinder 5 in the main machine unit is controlled to stop moving, so that the movement of the brake disc is stopped. The stroke sensor is used for detecting the position of a bolt on the locking shaft oil cylinder 8, when the stroke sensor detects that the bolt is not completely inserted into the braking tooth groove 10, a detection signal is transmitted to the electric control unit 1, the electric control unit 1 controls the disc shaft oil cylinder 5 in the main machine unit to stop moving, the locking shaft oil cylinder 8 is driven to extend to insert the bolt into the braking tooth groove 10, and the shaft locking function is completed.
The utility model discloses a multi-functional boats and ships shaft brake device please refer to fig. 1 to fig. 3, power hydraulic unit 2 includes motor, hydraulic oil pump, hydraulic pressure valves and oil tank, motor, hydrovalve group set up in the oil tank on, the hydraulic oil pump sets up in the oil tank, and the motor shaft is connected with hydraulic valve oil pump shaft, and the hydraulic oil pump passes through hydraulic line A with the hydraulic pressure valves to be connected, and the hydraulic pressure valves passes through hydraulic line B3 and host computer unit connection. The motor shaft is connected with a hydraulic valve oil pump, the hydraulic oil pump is connected with a hydraulic valve group through a hydraulic pipeline A, the hydraulic valve group is connected with the host unit through a hydraulic pipeline B3, and therefore the motor rotates to drive a valve core of the hydraulic valve group to press oil into various oil cylinders of the main control unit through the hydraulic pipeline B.
The utility model relates to a multifunctional ship brake shaft device, please refer to fig. 1 to 3, the host unit includes brake disc 7, U-shaped brake 6, 2U-shaped brake oil cylinders, U-shaped brake fixing base 4, 2 dish axle oil cylinders 5, shaft locking device oil cylinder 8 and base 9, U-shaped brake 6 is fixed in U-shaped brake fixing base 4, U-shaped brake fixing base 4 contacts with base 9, base 9 is fixed on the ship, brake disc 7 inserts in the U-shaped opening of U-shaped brake 6, oil cylinder grooves are respectively arranged on two walls of U-shaped brake 6, 2U-shaped brake oil cylinders are arranged in the oil cylinder grooves, 2 shoes for tightening brake disc 7 are respectively buckled on the top of the piston rods of 2U-shaped brake oil cylinders, a spring is arranged between shoe and U-shaped brake oil cylinder, 2 bottom ends of dish axle oil cylinders 5 are hinged with base 9, 5 upper ends of dish axle hydro-cylinder are articulated with U-shaped brake fixing base 4, even interval sets up brake disc tooth's socket 10 on 7 limits of brake disc circle, 8 piston rod tops of lock axle hydro-cylinder set up the bolt, the bolt cooperatees with brake disc tooth's socket 10, and 8 bottom mounting of lock axle hydro-cylinder are on the base. The brake disc 7, the U-shaped brake 6, 2U-shaped brake oil cylinders and the U-shaped brake fixing seat 4 form a device for completing the shaft system braking function; the brake disc 7 and the 2 disc shaft oil cylinders 5 form a disc shaft function device; the brake disc 7, the 2 disc shaft oil cylinders 5 and the shaft locking oil cylinder 8 form a device for completing the shaft locking function. The shaft system braking function is completed as follows: the U-shaped brake 6 is fixed in the U-shaped brake fixing seat 4, the U-shaped brake fixing seat 4 is in contact with the base 9, the base 9 is fixed on the ship, the U-shaped brake fixing seat 4 is in contact with the base 9, and when the U-shaped brake fixing seat 4 does not move, the base 9 stably supports the U-shaped brake fixing seat 4. U-shaped stopper 6 passes through the bolt fastening in the U-shaped stopper fixing base, sets up the hydro-cylinder groove on 6 two walls of U-shaped stopper respectively, 2 the U-shaped stopper hydro-cylinder sets up in the hydro-cylinder groove, and 2 shoes that are used for step up brake disc 7 are left-hand thread respectively in 2U-shaped stopper hydro-cylinder piston rod tops, set up the spring between shoe and the U-shaped stopper hydro-cylinder, when 1 control motor of electrical apparatus control unit, the motor shaft is connected with hydraulic valve group case to the motor drives hydraulic valve group and presses oil to 2U-shaped stopper hydro-cylinders, and 2U-shaped stopper hydro-cylinder press oil and promote the shoe and compress tightly brake disc 7, will rotate the braking of axle and stop. Under the action of the reversing valve, the U-shaped brake oil cylinder retracts, a spring is arranged between the shoe and the U-shaped brake oil cylinder, and the spring rebounds to enable the shoe to be away from the brake disc 7. The disc shaft functions are accomplished as follows: 2 the bottom end of the disc shaft oil cylinder 5 is hinged with the base 9, and the upper end of the disc shaft oil cylinder 5 is hinged with the U-shaped brake fixing seat 4. The brake disc 7 does circular motion, namely, under the state that the brake disc 7 is pressed by the shoe plate, the hydraulic valve group of the power unit presses oil to the disc shaft oil cylinder 5 to push the disc shaft oil cylinder 5 to extend, so that the U-shaped brake fixing seat 4 is driven to do upward arc motion, when the disc shaft oil cylinder 5 extends to a position, the brake disc 7 is loosened by the shoe plate, at the moment, because two ends of each disc shaft oil cylinder are respectively provided with an oil inlet and outlet interface, when the reversing valve of the hydraulic valve of the power unit 2 works, the disc shaft oil cylinder 5 can contract by feeding oil from the other oil port (discharging oil from the original oil inlet), when the disc shaft oil cylinder 5 contracts to the original position, the brake disc 7 is clamped by the shoe plate, the above motion is repeated again, and the brake disc is driven to do circular motion. The shaft locking function is completed as follows: brake disc tooth's socket 10 is set up at even interval on 7 limits of brake disc circle, 8 piston rod tops of lock axle hydro-cylinder set up the bolt, the bolt cooperatees with brake disc tooth's socket 10, and 8 bottom mounting of lock axle hydro-cylinder are on the base. When the photoelectric sensor arranged on the base 9 detects that the brake disc tooth space 10 on the brake disc 7 is at a proper position, the photoelectric sensor transmits a position signal of the brake disc tooth space 10 to the electric control unit 1, the electric control unit 1 controls the disc shaft oil cylinder 5 in the main unit to stop working, and the brake disc stops rotating. Then a stroke sensor arranged on the base 9 detects that the locking shaft bolt is not inserted into the brake disc tooth groove 10, and transmits a signal to the electric control unit 1, the electric control unit 1 controls the power hydraulic unit 2 to supply oil or withdraw the oil supply, so that the disc shaft oil cylinder 5 in the main unit stops, the locking shaft oil cylinder 8 works, the locking shaft oil cylinder 8 extends, and the locking shaft bolt is inserted into the brake disc tooth groove 10, thereby realizing the shaft locking function.
The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims (4)

1. The utility model provides a multi-functional boats and ships shaft braking device which characterized in that: including electric control unit (1), power hydraulic unit (2) and host computer unit, electric control unit (1) is connected with power hydraulic unit (2) electricity, power hydraulic unit (2) are connected through hydraulic line B (3) with the host computer unit, and electric control unit (1) control power hydraulic unit and host computer unit realize that the automation of boats and ships is stopped axle, dish axle, lock axle.
2. A multi-function marine brake rigging according to claim 1, wherein: the electric control unit (1) comprises a control mainboard, a photoelectric sensor, a stroke sensor and a cabinet body, wherein the control mainboard is arranged in the cabinet body, the stroke sensor and the photoelectric sensor are fixed on the base, and the control mainboard is connected with the photoelectric sensor and the stroke sensor through data lines.
3. A multi-function marine brake rigging according to claim 2, wherein: the power hydraulic unit (2) comprises a motor, a hydraulic oil pump, a hydraulic valve group and an oil tank, wherein the motor and the hydraulic valve group are arranged on the oil tank, the hydraulic oil pump is arranged in the oil tank, a motor shaft is connected with a hydraulic valve oil pump shaft, the hydraulic oil pump is connected with the hydraulic valve group through a hydraulic pipeline A, and the hydraulic valve group is connected with the host unit through a hydraulic pipeline B (3).
4. A multi-function marine brake rigging according to claim 3, wherein: the main unit comprises a brake disc (7), a U-shaped brake (6), 2U-shaped brake oil cylinders, a U-shaped brake fixing seat (4), 2 disc shaft oil cylinders (5), a shaft locking oil cylinder (8) and a base (9), the U-shaped brake (6) is fixed in the U-shaped brake fixing seat (4), the U-shaped brake fixing seat (4) is in contact with the base (9), the base (9) is fixed on a ship, the brake disc (7) is inserted into a U-shaped opening of the U-shaped brake (6), oil cylinder grooves are respectively formed in two walls of the U-shaped brake (6), 2U-shaped brake oil cylinders are arranged in the oil cylinder grooves, 2 shoe plates used for tightening the brake disc (7) are respectively buckled at the top ends of the piston rods of the 2U-shaped brake oil cylinders, springs are arranged between the shoe plates and the U-shaped brake oil cylinders, and the bottom ends of the disc shaft oil cylinders (5) are hinged to the base (9), the upper end of the disc shaft oil cylinder (5) is hinged to the U-shaped brake fixing seat (4), the brake disc (7) is arranged on the edge at equal intervals and provided with brake disc tooth grooves (10), the top end of a piston rod of the lock shaft oil cylinder (8) is provided with a bolt, the bolt is matched with the brake disc tooth grooves (10), and the bottom end of the lock shaft oil cylinder (8) is fixed on the base.
CN202121030799.0U 2021-05-14 2021-05-14 Multifunctional ship shaft brake device Active CN214648965U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121030799.0U CN214648965U (en) 2021-05-14 2021-05-14 Multifunctional ship shaft brake device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121030799.0U CN214648965U (en) 2021-05-14 2021-05-14 Multifunctional ship shaft brake device

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CN214648965U true CN214648965U (en) 2021-11-09

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CN202121030799.0U Active CN214648965U (en) 2021-05-14 2021-05-14 Multifunctional ship shaft brake device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114889797A (en) * 2022-06-17 2022-08-12 沪东中华造船(集团)有限公司 Shaft locking control method and shaft locking control device for double-stern shaft LNG ship

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114889797A (en) * 2022-06-17 2022-08-12 沪东中华造船(集团)有限公司 Shaft locking control method and shaft locking control device for double-stern shaft LNG ship

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