CN113586923A - Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition - Google Patents

Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition Download PDF

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Publication number
CN113586923A
CN113586923A CN202110850401.6A CN202110850401A CN113586923A CN 113586923 A CN113586923 A CN 113586923A CN 202110850401 A CN202110850401 A CN 202110850401A CN 113586923 A CN113586923 A CN 113586923A
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China
Prior art keywords
lubricant
tail
conveying
ship
tail bearing
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CN202110850401.6A
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Chinese (zh)
Inventor
董从林
袁成清
刘书天
张栗源
白秀琴
郭智威
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CN202110850401.6A priority Critical patent/CN113586923A/en
Publication of CN113586923A publication Critical patent/CN113586923A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B63H23/326—Water lubricated bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N21/00—Conduits; Junctions; Fittings for lubrication apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N23/00—Special adaptations of check valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2210/00—Applications
    • F16N2210/06—Marine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2210/00—Applications
    • F16N2210/14—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2230/00—Signal processing
    • F16N2230/02—Microprocessor; Microcomputer

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The invention discloses an automatic lubricant supply system for a ship water lubrication tail bearing under a low-speed working condition, which comprises a lubricant conveying hole, a lubricant supply device, a PLC (programmable logic controller) control unit and a tail shaft rotating speed measuring device, wherein the lubricant conveying hole is a radial through hole arranged at the lower part of the ship water lubrication tail bearing and is used for conveying a lubricant to a friction interface between the ship water lubrication tail bearing and a tail shaft; the lubricant supply device is connected with the lubricant conveying hole; the PLC control unit judges whether the tail shaft is in a low-speed working condition or not according to the rotating speed measured by the tail shaft rotating speed measuring device, and when the tail shaft is in the low-speed working condition, the lubricant supplying device conveys the lubricant to a friction interface between the ship water lubrication tail bearing and the tail shaft through the lubricant conveying hole, so that the lubricating condition of the friction interface is improved. The invention has high automation degree, can effectively solve the problem of poor lubricating condition of the ship water-lubricated tail bearing under the low-speed operating condition, and improves the operating reliability and the service life of the ship water-lubricated tail bearing.

Description

Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition
Technical Field
The invention belongs to the field of ships, relates to a water-lubricated tail shaft technology, and particularly relates to an automatic supply system for supplying a lubricant to a ship water-lubricated tail bearing under a low-speed working condition, in particular to a system for automatically supplying a green lubricant to a friction interface of a ship propeller shaft and the water-lubricated tail bearing under the low-speed running working condition that the water-lubricated tail bearing of the ship is poor in water medium bearing and lubricating effects such as starting, stopping or steering.
Background
The ship tail bearing is used for supporting a ship propeller shaft, is an important component of a ship propulsion system, and is also one of key components for determining the running reliability and energy consumption of a ship. The water lubrication tail bearing system is one of ship tail bearing systems, is usually an open system structure, utilizes natural water medium in sailing water area to lubricate and cool the tail bearing system, has the advantages of simple structure, environmental protection, saving of a large amount of nonferrous metals, mineral oil and the like, meets the development requirements of energy conservation, environmental protection and green shipping, and thus becomes the development trend of ship tail bearings. The tail pipe bearing in the ship water lubrication tail bearing system is generally composed of a tail bearing bush and a high polymer composite material lining arranged in the tail bearing bush, and under the working condition of medium and high speed, a thicker lubricating water film is formed between the high polymer composite material lining and a propeller shaft due to the hydrodynamic lubrication effect, so that the friction coefficient between the high polymer composite material lining and the propeller shaft is lower, the friction wear is smaller, the energy consumption is low, the design requirement is met, and the influence on the ship operation reliability is smaller. However, under low-speed operating conditions such as low speed, turning, frequent start and stop, the hydrodynamic pressure effect is not significant, and the viscosity of the aqueous medium is low, so that the lubricating water film is thin, the high polymer composite material lining and the propeller shaft are in a boundary lubricating or dry friction state, the friction coefficient between the lining and the propeller shaft is significantly increased, the temperature of a contact area is increased, the friction and wear behavior is significantly aggravated, the energy consumption is increased, even significant vibration and noise behaviors are induced, and the service life of the ship tail bearing and the sailing safety of the ship are greatly influenced.
At present, structure optimization and performance modification are two main ways for optimizing the phenomena of uneven bearing capacity and poor lubricating conditions of water-lubricated tail bearing lubrication under a low-speed working condition. A ship water lubrication tail bearing (patent publication number: CN104074871A) with an automatic uniform loading function is designed by researchers at naval engineering university and the like, and the aim of uniform stress inside a high polymer composite material lining is fulfilled by arranging an adaptive material distribution layer with a thickness gradient change between a transmission shaft and the high polymer composite material lining. A seawater lubrication polytetrafluoroethylene ship groove cavity dynamic pressure bearing (patent publication number: CN203035747U) designed by researchers such as Qingdao university of Engineer and the like enables seawater to be fully present at the contact position of a bearing and a transmission shaft by arranging a water groove and a water tank structure in the water lubrication bearing with the polytetrafluoroethylene lining, thereby achieving the purpose of enhancing the lubrication effect.
Aiming at the problem that the water medium bearing and the lubricating effect of the water-lubricated ship tail bearing are poor under the low-speed working conditions of starting, stopping or steering and the like, the system for automatically providing the lubricant for the water-lubricated ship tail bearing under the low-speed working conditions is designed to compensate the shortage of the lubricating capacity of the water-lubricated tail bearing under the low-speed working conditions, so that the aim of enhancing the lubricating capacity between a propeller shaft and a lining friction interface of a high polymer composite material is fulfilled, the problems of abrasion, vibration, noise and the like caused by the poor lubricating effect of the water-lubricated ship tail bearing under the low-speed working conditions of starting, stopping or steering and the like are solved, and the reliability and the safety of ship navigation are improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the automatic lubricant supply system for the ship water-lubricated tail bearing under the low-speed working condition is designed, and the green lubricant is actively provided for the ship water-lubricated tail bearing under the low-speed working conditions of starting, stopping, steering and the like of a ship, so that the aim of improving the lubricating condition between a propeller shaft and a lining friction interface of a high polymer composite material is fulfilled, the problems of abrasion, vibration and noise caused by poor lubricating effect under the low-speed working conditions of starting, stopping, steering and the like of the ship water-lubricated tail bearing are solved, and the service life and the running reliability of the ship water-lubricated tail bearing are improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a boats and ships water lubrication tail bearing's automatic feed system of emollient under low-speed operating mode which characterized in that: the method comprises the following steps:
the lubricant conveying hole is used for conveying a lubricant to a friction interface between a high-molecular composite material lining of the ship water lubrication tail bearing and the tail shaft;
the lubricant supply device is connected with the lubricant conveying hole;
when the ship tail shaft is in a low-speed working condition, the lubricant supply device conveys the lubricant to a friction interface between a high-molecular composite material lining of the ship water lubrication tail bearing and the tail shaft through the lubricant conveying hole, and the lubrication condition of the friction interface is improved.
And the PLC control unit judges whether the tail shaft is in a low-speed working condition or not according to the rotating speed measured by the tail shaft rotating speed measuring device.
Furthermore, the ship water lubrication tail bearing is horizontally installed, and the lubricant conveying hole is a radial through hole arranged at the lower part of the ship water lubrication tail bearing.
Furthermore, the tail shaft rotating speed measuring device is a non-contact type photoelectric encoder rotating speed measuring device.
Furthermore, the non-contact type photoelectric encoder rotating speed measuring device comprises a light source emitter, a photoelectric coding disc installed on the tail shaft, a light source receiver and a data acquisition card, wherein the light source emitter and the light source receiver are installed on two sides of the photoelectric coding disc in a mode that the light source emitter and the light source receiver are opposite to each other along the axial direction of the tail shaft, the photoelectric coding disc rotates along with the tail shaft, a light hole on the photoelectric coding disc intermittently transmits a light source circuit, the data acquisition card acquires and transmits intermittent light source signals received by the light source receiver to a PLC control unit, and the PLC control unit calculates the rotating speed of the tail shaft at intervals according to the intermittent light source signals.
Further, the lubricant supplying device comprises a lubricant conveying pipeline, a conveying pump and a lubricant storage tank, wherein an inlet of the conveying pump is connected with the lubricant storage tank, and an outlet of the conveying pump is connected with the lubricant conveying hole through the lubricant conveying pipeline.
Further, a check valve for preventing the lubricant from flowing back is arranged between each lubricant delivery hole and the corresponding lubricant delivery pipeline.
Further, the lubricant delivery holes are connected with the corresponding lubricant delivery pipelines through threaded joints.
Furthermore, the ship water lubrication tail bearing comprises a tail bearing bush and a polymer composite material lining arranged in the tail bearing bush, the lubricant conveying hole is a radial through hole penetrating through the tail bearing bush and the polymer composite material lining, and the diameter of each through hole is the same; the lubricant one-way delivery hole is connected with a lubricant one-way delivery pipeline, the other end of the lubricant one-way delivery pipeline is connected with a lubricant delivery device consisting of a gear pump and a lubricant storage box, and the lubricant one-way delivery pipeline is formed by installing a one-way valve on the delivery pipeline; the gear pump can unidirectionally convey the green lubricant in the lubricant storage tank to a friction interface between the perforated polymer composite material lining and the propeller shaft through the lubricant conveying pipeline; the lubricant conveyed to the friction interface of the lining of the high polymer composite material is rolled by the rotating tail shaft and covers the friction interface of the lining of the high polymer composite material, so that the lubricating environment between the tail shaft and the lining of the high polymer composite material is improved, and the friction coefficient, the friction force and the friction and wear amount are reduced.
One end of the one-way conveying pipeline is connected with the lubricant conveying hole, the other end of the one-way conveying pipeline is connected with the gear pump, the gear pump can convey the lubricant in the lubricant storage tank to the perforated lining friction interface of the polymer composite material through the one-way conveying pipeline, and the supply amount of the lubricant can be set in advance. Wherein, through install the check valve on the lubricant delivery pipe, form the delivery pipe that the lubricant unidirection was carried, namely: the lubricant can be conveyed to the friction interface between the polymer composite lining of the water lubricated bearing and the tail shaft through the one-way valve, and the external water medium cannot enter the lubricant conveying pipeline and the lubricant storage tank through the one-way valve. The lubricant is green, cheap and easily decomposed green lubricant, and can be water-based solution of polyethylene glycol, such as white oil or chlorinated paraffin.
The invention utilizes a data acquisition card to acquire the rotating speed of the tail shaft in real time and transmits the rotating speed to a PLC control unit; the rotating speed of the tail shaft and the rotating speed value which is set in advance to cause friction and wear aggravation are judged and compared through the PLC control unit, when the rotating speed of the tail shaft is lower than the set rotating speed, a working signal is sent to the gear pump, and the lubricant is conveyed to a conveying hole on a ship water lubrication tail bearing through the gear pump and a one-way pipeline. The lubricant conveyed to the friction interface of the lining of the high polymer composite material is rolled by the rotating tail shaft and covers the friction interface of the bearing of the high polymer composite material, so that the lubricating capability of the water-lubricated tail bearing of the ship under a low-speed working condition is compensated, the lubricating condition between the tail shaft and the lining of the high polymer composite material is actively improved, and the friction coefficient, the friction force and the friction and wear amount are reduced. When the rotating speed of the tail shaft is higher than the set rotating speed value, the PLC control unit sends a stop signal, the gear pump stops working, and the lubricant stops conveying.
Compared with the prior art, the invention has the following beneficial effects:
1) the device takes the rotating speed of the ship tail shaft which generates severe abrasion as the judgment basis of lubricant supply, can be adjusted according to the actual situation, can effectively cover the low-speed working conditions of starting, stopping, steering and the like of the bearing, actively supplies the lubricant to the ship water lubrication bearing, and can effectively solve the problem that the traditional ship water lubrication tail bearing has poor lubricating effect under the low-speed working conditions of starting, stopping, steering and the like;
2) the supply amount of the lubricant can be determined according to the wear state of the tail shaft and the water lubrication bearing, and the lubrication state is obviously improved;
3) the device only carries out active lubrication at the special working condition stages with poor water medium bearing and lubricating effects such as starting, stopping and steering of the ship tail bearing, so that the consumption of the lubricant is low, and resources are saved;
4) the selected lubricant is a green easily-decomposed lubricant and is environment-friendly.
The invention compensates the deficiency of water medium bearing and lubricating capability of the high polymer composite lining under the low-speed working condition by providing the green lubricant for the friction interface of the ship tail shaft and the ship water-lubricated tail bearing, solves the problems of abrasion, vibration and noise caused by poor lubricating effect of the ship water-lubricated tail bearing under the low-speed operating conditions of starting, stopping or steering and the like, and further improves the operation reliability and the service life of the ship water-lubricated tail bearing.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a schematic view of a tail shaft speed measurement configuration of the present invention;
FIG. 3 is a top view of the lubricant delivery orifice configuration of the present invention;
FIG. 4 is a schematic view of the lubricant delivery orifice of the present invention in cooperation with a lubricant delivery tube;
FIG. 5 is a flow chart of the operation of the present invention;
in the figure: 1-tail bearing support, 2-tail bearing bush, 3-high polymer composite material lining, 4-lubricant conveying hole, 5-one-way valve, 6-lubricant conveying pipeline, 7-gear pump, 8-lubricant storage box, 9-PLC control unit, 10-data acquisition card, 11-light source receiver, 12-tail shaft, 13-photoelectric encoding disc, 14-light source generator and 15-threaded joint.
Detailed Description
The structure, principle and operation of the invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the invention provides an automatic lubricant supply system for a water-lubricated tail bearing of a ship under a low-speed working condition, and particularly provides a system for automatically supplying lubricant to a friction interface of the water-lubricated tail bearing of the ship and a tail shaft under a low-speed working condition with poor water medium bearing and lubricating effects, such as low speed, heavy load, starting, stopping or steering. The system comprises a lubricant conveying hole 4, a lubricant supplying device, a PLC control unit 9 and a tail shaft rotating speed measuring device, wherein the lubricant conveying hole 4 is a radial through hole arranged at the lower part of a ship water lubrication tail bearing, penetrates through a tail bearing bush and a polymer composite material lining arranged in the tail bearing bush, and is used for conveying a lubricant to a friction interface between the polymer composite material lining and the tail shaft; the lubricant supply device is connected with the lubricant conveying hole 4; the PLC control unit 9 judges whether the tail shaft is in a low-speed working condition or not according to the rotating speed measured by the tail shaft rotating speed measuring device, and when the tail shaft is in the low-speed working condition, the lubricant supply device conveys the lubricant to a friction interface between a high-molecular composite material lining of the ship water lubrication tail bearing and the tail shaft through the lubricant conveying hole 4, so that the lubricating condition of the friction interface is improved.
The ship water lubrication tail bearing is horizontally arranged on a tail bearing support 1, the type is not limited, in the embodiment, the ship water lubrication tail bearing comprises a tail bearing bush 2 and a high polymer composite material lining 3 arranged in the tail bearing bush 2, and the lubricant conveying hole 4 is a radial through hole penetrating through the tail bearing bush 2 and the high polymer composite material lining 3.
The specific form of the lubricant supplying device is not limited, and the supplied lubricant is green, cheap and easily decomposed green lubricant, and can be a water-based solution of polyethylene glycol. The embodiment provides a specific form, and specifically comprises a lubricant delivery pipeline 6, a delivery pump and a lubricant storage tank 8, the specific form of the delivery pump is not limited, and the delivery pump can be a gear pump 7, an inlet of the delivery pump is connected with the lubricant storage tank 8, and an outlet of the delivery pump is connected with the lubricant delivery hole 5 through the lubricant delivery pipeline 6. A check valve 5 for preventing the lubricant from flowing back is arranged between each lubricant delivery hole 4 and the corresponding lubricant delivery pipe 6, and the lubricant delivery holes 4 are connected with the corresponding lubricant delivery pipes 6 through threaded joints 15.
The PLC control unit 9 receives a rotating speed signal measured by the tail shaft rotating speed measuring device, sets a rotating speed threshold value, can judge that the rotating speed is a low-speed working condition when the rotating speed is less than the threshold value, and sends a control signal to start the delivery pump.
The rotation speed measuring device of the tail shaft is a non-contact type photoelectric encoder rotation speed measuring device, the non-contact type photoelectric encoder rotation speed measuring device comprises a light source receiver 11, a light source emitter 14, a photoelectric coding disc 13 and a data acquisition card 10, the photoelectric coding disc 13 and the light source receiver 11 are installed on two sides of the photoelectric coding disc 13 oppositely along the axial direction of the tail shaft, the photoelectric coding disc 13 rotates along with the rotation shaft, light holes in the photoelectric coding disc intermittently transmit light source circuits, light source signals received by the light source receiver 11 are acquired through the data acquisition card 10, and the PLC control unit 9 calculates the rotation speed of the rotation shaft according to the interval of the intermittently transmitted light sources.
During testing, the non-contact photoelectric encoder rotating speed measuring device continuously emits light sources through the light source emitter 14, the light source receiver 11 receives the light sources, the photoelectric encoding disk 13 fixed on the tail shaft rotates along with the tail shaft, when the light-transmitting holes on the photoelectric encoding disk 13 are rotated to between the light source transmitter 14 and the light source receiver 11, the blocking light source will be transmitted and received by the light source receiver 11, therefore, the real-time rotation speed of the tail shaft is calculated by measuring the interval time of the light sources received by the light source receiver 11 for multiple times, the data acquisition card collects the received signal of the light source receiver 11 and transmits the signal to the PLC control unit 9, the rotation speed of the tail shaft is calculated by the PLC control unit 9, of course, an independent controller can be arranged in the non-contact type photoelectric encoder rotating speed measuring device for counting the rotating speed, and the PLC control unit 9 can directly receive a rotating speed signal; the PLC control unit 9 compares the collected rotation speed value of the tail shaft with a rotation speed threshold value which is set in advance and causes the friction and wear to be intensified, and judges the magnitude relation between the collected rotation speed value and the set rotation speed value. When the rotating speed of the tail shaft is less than a preset rotating speed threshold value, a signal for conveying the lubricant is sent to the lubricant conveying device by the PLC control unit 9 and transmitted to the gear pump 7, the gear pump 7 conveys the lubricant in the lubricant storage tank 8 to the lubricant conveying hole 4 on the tail bearing through a one-way pipeline consisting of the one-way valve 5 and the lubricant conveying pipeline 6, the lubricant enters the friction interface of the polymer composite material lining 3, and the rotated tail shaft is rolled into and covers the friction interface of the polymer composite material lining 3, so that the lubricating condition between the tail shaft and the polymer composite material lining 3 is actively improved, and the friction coefficient, the friction force and the friction wear are reduced. When the rotation speed of the tail shaft exceeds a preset rotation speed value, the PLC control unit 9 sends a signal for stopping lubricant conveying to the lubricant conveying device, at the moment, the gear pump 7 stops working, and the lubricant conveying to the water lubrication tail bearing of the ship is stopped.
The rotating speed threshold value is the number of rotating speeds of the tail shaft under the low-speed working conditions of starting, stopping, steering and the like of the ship, and can be between 0.3m/s and 1m/s according to different ship types.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims (9)

1. The utility model provides a boats and ships water lubrication tail bearing's automatic feed system of emollient under low-speed operating mode which characterized in that: the method comprises the following steps:
the lubricant conveying hole is used for conveying lubricant to a friction interface between the water lubrication tail bearing of the ship and the tail shaft;
the lubricant supply device is connected with the lubricant conveying hole;
when the ship tail shaft is in a low-speed working condition, the lubricant supply device conveys the lubricant to a friction interface between the ship water lubrication tail bearing and the tail shaft through the lubricant conveying hole, and the lubrication condition of the friction interface is improved.
2. The automatic lubricant supply system according to claim 1, wherein: the device further comprises a PLC control unit and a ship tail shaft rotating speed measuring device, wherein the PLC control unit judges whether the tail shaft is in a low-speed working condition or not according to the rotating speed measured by the tail shaft rotating speed measuring device.
3. The automatic lubricant supply system according to claim 2, wherein: the ship water lubrication tail bearing is horizontally installed, and the lubricant conveying hole is a radial through hole arranged at the lower part of the ship water lubrication tail bearing.
4. The automatic lubricant supply system according to claim 2, wherein: the tail shaft rotating speed measuring device is a non-contact type photoelectric encoder rotating speed measuring device.
5. The automatic lubricant supply system according to claim 4, wherein: the non-contact type photoelectric encoder rotating speed measuring device comprises a light source transmitter, a photoelectric coding disc, a light source receiver and a data acquisition card, wherein the photoelectric coding disc, the light source receiver and the data acquisition card are installed on the rotating shaft, the light source transmitter and the light source receiver are installed on two sides of the photoelectric coding disc in a mode of being opposite to each other along the axial direction of a tail shaft, the photoelectric coding disc rotates along with the rotating shaft, a light hole in the photoelectric coding disc intermittently transmits a light source, the data acquisition card acquires intermittent signals received by the light source receiver and then transmits the signals to a PLC control unit, and the PLC control unit calculates the rotating speed of the rotating shaft at intervals according to the intermittent light sources.
6. The automatic lubricant supply system according to claim 2, wherein: the lubricant supply device comprises a lubricant conveying pipeline, a conveying pump and a lubricant storage tank, wherein an inlet of the conveying pump is connected with the lubricant storage tank, and an outlet of the conveying pump is connected with the lubricant conveying hole through the lubricant conveying pipeline.
7. The automatic lubricant supply system according to claim 6, wherein: and a check valve for preventing the lubricant from flowing back is arranged between each lubricant conveying hole and the corresponding lubricant conveying pipeline.
8. The automatic lubricant supply system according to claim 6, wherein: the lubricant conveying holes are connected with corresponding lubricant conveying pipelines through threaded joints.
9. The automatic lubricant supply system according to claim 2, wherein: the ship water lubrication tail bearing comprises a tail bearing bush and a high polymer composite material lining arranged in the tail bearing bush, and the lubricant conveying hole is a radial through hole penetrating through the tail bearing bush and the high polymer composite material lining.
CN202110850401.6A 2021-07-27 2021-07-27 Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition Pending CN113586923A (en)

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CN202110850401.6A CN113586923A (en) 2021-07-27 2021-07-27 Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645360A (en) * 1970-03-12 1972-02-29 Outboard Marine Corp Upper bearing lubrication for outboard gearcase
CN203567922U (en) * 2013-11-04 2014-04-30 武汉理工大学 Water lubrication static pressure stern bearing for ships
CN105431508A (en) * 2013-08-21 2016-03-23 三洋化成工业株式会社 Water-soluble lubricant oil
CN106352904A (en) * 2016-09-19 2017-01-25 上海未来伙伴机器人有限公司 Photoelectric encoder coded disc, photoelectric detection device, photoelectric encoder and robot
CN108506355A (en) * 2018-04-08 2018-09-07 青岛理工大学 Lubricating method of water-lubricated bearing based on micro-oil drop lubrication start-stop protection
CN210416944U (en) * 2019-06-13 2020-04-28 宜昌鑫汇船舶修造有限公司 Energy-saving ship tail shaft sealing system
CN212473873U (en) * 2020-07-13 2021-02-05 常州玻璃钢造船厂有限公司 Tail shaft structure for ship

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645360A (en) * 1970-03-12 1972-02-29 Outboard Marine Corp Upper bearing lubrication for outboard gearcase
CN105431508A (en) * 2013-08-21 2016-03-23 三洋化成工业株式会社 Water-soluble lubricant oil
CN203567922U (en) * 2013-11-04 2014-04-30 武汉理工大学 Water lubrication static pressure stern bearing for ships
CN106352904A (en) * 2016-09-19 2017-01-25 上海未来伙伴机器人有限公司 Photoelectric encoder coded disc, photoelectric detection device, photoelectric encoder and robot
CN108506355A (en) * 2018-04-08 2018-09-07 青岛理工大学 Lubricating method of water-lubricated bearing based on micro-oil drop lubrication start-stop protection
CN210416944U (en) * 2019-06-13 2020-04-28 宜昌鑫汇船舶修造有限公司 Energy-saving ship tail shaft sealing system
CN212473873U (en) * 2020-07-13 2021-02-05 常州玻璃钢造船厂有限公司 Tail shaft structure for ship

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