CN113320673A - Thrust bearing device based on active thrust balancing technology - Google Patents
Thrust bearing device based on active thrust balancing technology Download PDFInfo
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- CN113320673A CN113320673A CN202110710416.2A CN202110710416A CN113320673A CN 113320673 A CN113320673 A CN 113320673A CN 202110710416 A CN202110710416 A CN 202110710416A CN 113320673 A CN113320673 A CN 113320673A
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- thrust
- ring
- tail
- end cover
- head
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
- B63G8/08—Propulsion
-
- 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
- B63H2023/325—Thrust bearings, i.e. axial bearings for propeller shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention relates to a main shaft system device of a ship, in particular to a thrust bearing device based on an active thrust balancing technology. The hydraulic oil pressure is controlled in real time through a servo hydraulic press, the cross section area difference of a first mechanical sealing surface and a tail mechanical sealing surface is combined, the surface of a movable ring bears the axial counter force capable of offsetting the thrust borne by a shaft system, the structure for bearing the thrust inside a thrust bearing is greatly simplified, and the size and the weight of the thrust bearing are reduced.
Description
Technical Field
The invention relates to a main shaft system device of a ship, in particular to a thrust bearing device based on an active thrust balancing technology.
Background
The thrust bearing is one of important devices of a submersible shafting, and serves as a thrust transmission pivot for transmitting thrust or pulling force generated by a propeller to a hull to push the hull to move forwards or backwards.
At present, a ship main propulsion shaft system generally uses a traditional thrust bearing, the thrust bearing adopts a thrust ring, a thrust pad and a thrust balancing mechanism to transmit and balance shafting thrust, a common Michelle bearing structure is generally provided with a plurality of thrust block structures at the forward backing end respectively, and a group of upper and lower balancing block groups are arranged behind the thrust blocks and used for balancing uneven stress brought by installation errors of the thrust blocks. The structure has complex form, numerous parts and high installation precision requirement, and is not beneficial to the simplified design and manufacture of the bearing structure.
Meanwhile, the traditional thrust bearing takes a thrust pad as a core bearing component, and utilizes the dynamic pressure lubrication principle, through the eccentric arrangement of a thrust block fulcrum and by means of the lubricating oil brought from the large end of the thrust block in the rotating process of a shafting, an oil wedge is formed, and the thrust of the shafting is transmitted to a static thrust block from the rotating shafting. The friction surface of the structure is large, a certain amount of heat is generated by the friction surface in the normal use process, the bearing is cooled by means of lubricating oil in a cooling cavity of an external forced lubricating oil system or a water cooling system, an auxiliary system is complicated, a large amount of arrangement space is occupied on a ship, and the structure cannot adapt to the development of miniaturization and fine simplification of the auxiliary system of the ship.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the thrust bearing device based on the active thrust balancing technology can greatly simplify the structure of the thrust bearing, reduce the size and the weight of the thrust bearing, simplify an auxiliary system of the thrust bearing and meet the design requirement of ship miniaturization.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a thrust bearing device based on active thrust balancing technique, includes thrust shaft and the thrust bearing body of suit on the thrust shaft, fixed mounting has the rotating collar on the thrust shaft, its characterized in that: the thrust shaft comprises a first section and a tail section, the first section and the tail section are both cylinders, the diameter of the first section is smaller than that of the tail section, the dynamic ring is fixed at the joint of the head section and the tail section of the thrust shaft, the head section of the thrust shaft is sleeved with a static ring for driving a vehicle, the tail section is sleeved with a static ring for reversing, the front static ring and the head end face of the dynamic ring are matched to form a mechanical dynamic seal, the reverse static ring and the tail end face of the dynamic ring are matched to form a mechanical dynamic seal, the sectional area of a first mechanical sealing surface formed by the front static ring and the head end face of the dynamic ring is smaller than that of a tail mechanical sealing surface formed by the reverse static ring and the tail end face of the dynamic ring, the bearing body is filled with hydraulic oil, and is communicated with a servo hydraulic machine through a hydraulic pipeline, the servo hydraulic machine is connected with a thrust control system through a cable, the thrust control system controls the pressure of hydraulic oil in the bearing body in real time based on an active thrust balance mode. .
Preferably, the active thrust balancing-based mode specifically includes: the thrust control system collects thrust borne by the shafting in real time and converts the thrust into a control signal for the servo hydraulic machine, the servo hydraulic machine controls the pressure of output hydraulic oil in real time according to the control signal given by the thrust control system, and the pressure of the hydraulic oil in the bearing body is controlled in real time through the hydraulic pipeline.
Preferably, the hydraulic oil pressure P output by the servo hydraulic machine satisfies the following relationship:
P＝4F/[π(D1 2-D2 2)]
wherein F is thrust on the shaft system and D1The diameter of the section of the tail mechanical sealing surface is shown, and the diameter of the section of the head mechanical sealing surface is shown as D2.
Preferably, the stationary ring for forward driving is pressed on the head end face of the moving ring through a head pressing spring, and the stationary ring for reverse driving is pressed on the tail end face of the moving ring through a tail pressing spring.
Preferably, the rotating ring is made of hard alloy, and the forward stationary ring and the reverse stationary ring are made of graphite carbon.
Preferably, the thrust bearing body comprises a housing, and a head cover and a tail cover connected with two end portions of the housing, and the head cover and the tail cover are in clearance fit with the thrust shaft.
Preferably, the head end cover and the tail end cover are provided with mounting holes which are uniformly distributed in an annular shape along the circumferential direction, one end of the head compression spring is fixed in the mounting hole of the head end cover, the other end of the head compression spring is connected with the stationary ring for forward driving, one end of the tail compression spring is fixed in the mounting hole of the tail end cover, and the other end of the tail compression spring is connected with the stationary ring for reverse driving.
Preferably, the outer wall of the head end cover is configured to be welded with the shell, the inner wall of the head end cover is configured to be sealed with the stationary ring of the forward vehicle, the outer wall of the tail end cover is configured to be welded with the shell, and the inner wall of the tail end cover is configured to be sealed with the stationary ring of the reverse vehicle.
Compared with the prior art, the invention has the following main advantages:
1. the active thrust balancing technology is adopted, the hydraulic oil pressure is controlled in real time through a servo hydraulic machine, and the cross-sectional area difference of a first mechanical sealing surface and a tail mechanical sealing surface is combined, so that the surface of a moving ring bears axial counter force which can offset the thrust borne by a shaft system, the structure for bearing the thrust inside the thrust bearing is greatly simplified, and the size and the weight of the thrust bearing are reduced;
2. the dynamic ring and the forward/reverse static ring are made of hard alloy and graphite carbon materials, so that the weight of the material used by the thrust bearing is greatly reduced compared with that of the traditional thrust bearing, and the total weight of the thrust bearing is further reduced;
3. graphite carbon-hard alloy matching surfaces are arranged between the moving ring and the forward static ring and between the moving ring and the reverse static ring, the friction surface area is only half of that of a traditional thrust block of the thrust bearing, the friction energy consumption is greatly reduced, and the friction heat generation is favorably reduced;
4. because the thrust bearing has a simple internal structure and a small friction surface area, the cooling requirement can be met only by trace cooling water, and a complex cooling system is not required, thereby realizing the simplification of an auxiliary system.
Drawings
FIG. 1 is a schematic view of the construction of a thrust bearing assembly of the present invention;
FIG. 2 is a schematic force diagram of the thrust bearing assembly of the present invention.
In the figure: 1. a thrust bearing body; 2. a hydraulic line; 3. a servo hydraulic press; 4. a thrust control system; 5. a thrust shaft; 101. a housing; 102. a head end cover; 103. a moving ring; 104. a stationary ring for driving; 105. a reversing stationary ring; 106. a spring is pressed; 107. a tail compression spring; 108. and a tail end cover.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to fig. 1 and 2, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
As shown in fig. 1, a thrust bearing device based on active thrust balancing technology comprises a thrust bearing body 1 and a thrust shaft 5, wherein the thrust bearing body 1 is sleeved on the thrust shaft 5, a movable ring 103 is fixedly installed on the thrust shaft 5, the thrust shaft 5 comprises a first section and a tail section, the first section and the tail section are both cylinders, the diameter of the first section is smaller than that of the tail section, the movable ring is fixed at the joint of the first section and the tail section of the thrust shaft, a forward static ring 104 is sleeved on the first section of the thrust shaft, a reverse static ring 105 is sleeved on the tail section, the forward static ring 104 and the head end face of the movable ring 103 are matched to form a mechanical dynamic seal, the reverse static ring 105 and the tail end face of the movable ring 103 are matched to form a mechanical dynamic seal, the sectional area of a first mechanical seal face formed by the forward static ring 103 and the head end face of the movable ring is smaller than the sectional area of a tail mechanical seal face formed by the static ring 105 and the reverse seal face of the movable ring, the bearing comprises a bearing body 1 and is characterized in that the interior of the bearing body 1 is filled with hydraulic oil and is communicated with a servo hydraulic machine 3 through a hydraulic pipeline 2, and the servo hydraulic machine 3 is connected with a thrust control system 4 through a cable.
The front static ring 104 is pressed on the head end face of the moving ring 103 through a head pressing spring 106, the reverse static ring 105 is pressed on the tail end face of the moving ring 103 through a tail pressing spring 107, the thrust bearing body 1 comprises a shell 101, and a head end cover 102 and a tail end cover 108 which are connected with two end portions of the shell, the head end cover 102 and the tail end cover 108 are in clearance fit with the thrust shaft 5, mounting holes which are uniformly distributed in an annular shape along the circumferential direction are formed in the head end cover 102 and the tail end cover 108, the number of the mounting holes can be 6-12, one end of the head pressing spring 106 is fixed in the mounting hole of the head end cover 102, the other end of the head pressing spring is connected with the front static ring 104, one end of the tail pressing spring 107 is fixed in the mounting hole of the tail end cover 108, and the other end of the tail pressing spring is connected with the reverse static ring 105.
The outer wall of the head cover 102 is configured by welding with the shell 101, the inner wall of the head cover 102 is configured by sealing with the stationary ring 104 for forward turning, the outer wall of the tail cover 108 is configured by welding with the shell 101, and the inner wall of the tail cover 108 is configured by sealing with the stationary ring 105 for backward turning.
The sealing of hydraulic oil in the thrust bearing cavity is realized through the sealing matching among the head/tail end cover, the forward/reverse static ring and the dynamic ring.
The thrust bearing device adopts an active thrust balancing technology, and the thrust control system 4 controls the pressure of hydraulic oil in the bearing body 1 in real time based on an active thrust balancing mode. The active thrust balance-based mode specifically comprises the following steps: the thrust control system 4 collects thrust borne by the shafting in real time and converts the thrust into a control signal for the servo hydraulic machine 3, the servo hydraulic machine 3 controls the pressure of output hydraulic oil in real time according to the control signal given by the thrust control system 4, and the pressure of the hydraulic oil in the bearing body 1 is controlled in real time through the hydraulic pipeline 2.
The principle of the active thrust balancing technology is as follows: because the hydraulic oil in the thrust bearing cavity is sealing liquid and is communicated with the servo hydraulic machine through a hydraulic pipeline, the thrust bearing cavity and the hydraulic pipeline also form the sealing liquid. According to the pascal principle: the pressure applied on the closed liquid can be constantly transmitted to all directions by the liquid, so that the servo hydraulic machine can form the pressure (also called pressure in engineering) in a hydraulic pipeline through output pressure and transmit the pressure to all places in a thrust bearing cavity through sealed hydraulic oil. Meanwhile, the sectional area of the first mechanical sealing surface formed by the forward static ring and the head end face of the dynamic ring is smaller than the sectional area of the tail mechanical sealing surface formed by the reverse static ring and the tail end face of the dynamic ring, and the sectional area difference enables the surface of the dynamic ring to bear hydraulic pressure towards the propeller direction under the action of the pressure of hydraulic oil in the cavity, and the balance between the hydraulic pressure and thrust borne by a shaft system can be realized by controlling the hydraulic pressure.
As shown in fig. 2, the thrust force of the shafting collected by the thrust control system in real time is F, and the stationary ring for driving is providedThe diameter of the first mechanical sealing surface section formed with the head end surface of the movable ring is D2The diameter of the section of a tail mechanical sealing surface formed by the tail end faces of the reversing static ring and the rotating ring is D1The diameter of the excircle of the moving ring is D3。
Let the pressure transmitted by the hydraulic oil in all directions be P0The thrust F of the hydraulic oil on the head end surface of the movable ring1Comprises the following steps:
F1＝P0*[π(D3 2-D2 2)/4]
thrust F of hydraulic oil applied to tail end face of moving ring2Comprises the following steps:
F2＝P0*[π(D3 2-D1 2)/4]
according to the thrust balance, the following steps are carried out:
F＝F1-F2＝P0*[π(D1 2-D2 2)/4]]
according to the Pascal principle, the hydraulic oil pressure P output by the servo hydraulic machine can be transmitted to all directions by hydraulic oil in a constant size, namely:
P＝P0
therefore, the hydraulic oil pressure P output by the servo hydraulic machine satisfies the following relation:
P＝4F/[π(D1 2-D2 2)]
the active thrust balancing technology is adopted to replace a thrust bearing structure of a traditional thrust bearing, so that the thrust bearing structure is greatly simplified, the moving ring is made of hard alloy, the forward static ring and the reverse static ring are made of graphite carbon, the total weight of the thrust bearing is further reduced, and the device miniaturization control effect that the weight is reduced by more than 75% and the occupied volume is reduced by more than 90% compared with the traditional thrust bearing under the same index can be realized.
Meanwhile, as the graphite carbon-hard alloy matching surfaces are arranged between the moving ring and the forward stationary ring as well as between the moving ring and the reverse stationary ring, the area of the friction surface is only half of that of a thrust block of the traditional thrust bearing, the friction energy consumption is greatly reduced, and the reduction of frictional heat is facilitated.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a thrust bearing device based on active thrust balancing technique, includes thrust shaft and the thrust bearing body of suit on the thrust shaft, fixed mounting has the rotating collar on the thrust shaft, its characterized in that: the thrust shaft comprises a first section and a tail section, the first section and the tail section are both cylinders, the diameter of the first section is smaller than that of the tail section, the dynamic ring is fixed at the joint of the head section and the tail section of the thrust shaft, the head section of the thrust shaft is sleeved with a static ring for driving a vehicle, the tail section is sleeved with a static ring for reversing, the front static ring and the head end face of the dynamic ring are matched to form a mechanical dynamic seal, the reverse static ring and the tail end face of the dynamic ring are matched to form a mechanical dynamic seal, the sectional area of a first mechanical sealing surface formed by the front static ring and the head end face of the dynamic ring is smaller than that of a tail mechanical sealing surface formed by the reverse static ring and the tail end face of the dynamic ring, the bearing body is filled with hydraulic oil, and is communicated with a servo hydraulic machine through a hydraulic pipeline, the servo hydraulic machine is connected with a thrust control system through a cable, the thrust control system controls the pressure of hydraulic oil in the bearing body in real time based on an active thrust balance mode.
2. A thrust bearing assembly based on active thrust balancing technology according to claim 1, characterized in that: the active thrust balance-based mode specifically comprises the following steps: the thrust control system collects thrust borne by the shafting in real time and converts the thrust into a control signal for the servo hydraulic machine, the servo hydraulic machine controls the pressure of output hydraulic oil in real time according to the control signal given by the thrust control system, and the pressure of the hydraulic oil in the bearing body is controlled in real time through the hydraulic pipeline.
3. A thrust bearing assembly based on active thrust balancing technology according to claim 2, characterized in that: the hydraulic oil pressure P output by the servo hydraulic machine satisfies the following relation:
P＝4F/[π(D1 2-D2 2)]
wherein F is thrust on the shaft system and D1The diameter of the section of the tail mechanical sealing surface is shown, and the diameter of the section of the head mechanical sealing surface is shown as D2.
4. A thrust bearing assembly based on active thrust balancing technology according to claim 1, characterized in that: the forward static ring is pressed on the head end face of the moving ring through a head pressing spring, and the reverse static ring is pressed on the tail end face of the moving ring through a tail pressing spring.
5. A thrust bearing arrangement based on active thrust balancing technology according to claim 1 or 4, characterized in that: the rotating ring is made of hard alloy, and the forward stationary ring and the reverse stationary ring are made of graphite carbon.
6. A thrust bearing arrangement based on active thrust balancing technology according to claim 1 or 4, characterized in that: the thrust bearing body comprises a shell, a head end cover and a tail end cover, wherein the head end cover and the tail end cover are connected with two end parts of the shell, and the head end cover and the tail end cover are in clearance fit with the thrust shaft.
7. A thrust bearing assembly based on active thrust balancing technology according to claim 6, characterized in that: the automobile reversing device is characterized in that mounting holes which are uniformly distributed in an annular shape along the circumferential direction are formed in the head end cover and the tail end cover, one end of the head compression spring is fixed in the mounting hole of the head end cover, the other end of the head compression spring is connected with the stationary ring of the front automobile, one end of the tail compression spring is fixed in the mounting hole of the tail end cover, and the other end of the tail compression spring is connected with the stationary ring of the back automobile.
8. A thrust bearing assembly based on active thrust balancing technology according to claim 6, characterized in that: the outer wall of the head end cover is in welding configuration with the shell, the inner wall of the head end cover is in sealing configuration with the stationary ring of forward turning, the outer wall of the tail end cover is in welding configuration with the shell, and the inner wall of the tail end cover is in sealing configuration with the stationary ring of backward turning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110710416.2A CN113320673B (en) | 2021-06-25 | 2021-06-25 | Thrust bearing device based on active thrust balance technology |
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| CN202110710416.2A CN113320673B (en) | 2021-06-25 | 2021-06-25 | Thrust bearing device based on active thrust balance technology |
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| CN113320673A true CN113320673A (en) | 2021-08-31 |
| CN113320673B CN113320673B (en) | 2023-06-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114104244A (en) * | 2021-12-06 | 2022-03-01 | 上海涟屹轴承科技有限公司 | Novel thrust bearing structure for ship |
| CN114572373A (en) * | 2022-03-21 | 2022-06-03 | 浙江海洋大学 | High-stability ship propulsion device based on hydraulic thrust bearing |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114104244A (en) * | 2021-12-06 | 2022-03-01 | 上海涟屹轴承科技有限公司 | Novel thrust bearing structure for ship |
| CN114572373A (en) * | 2022-03-21 | 2022-06-03 | 浙江海洋大学 | High-stability ship propulsion device based on hydraulic thrust bearing |
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| CN113320673B (en) | 2023-06-02 |
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