Steering oar oil supply method

Abstract

The invention discloses a steering oar oil supply method, a steering oar comprises an upper box body and an expansion oil tank, the expansion oil tank provides oil for cooling and lubricating a transmission assembly in the upper box body, the expansion oil tank is arranged below the upper box body, and a first oil suction pipe and a first oil return pipe are arranged between the expansion oil tank and the upper box body; the first oil suction pipe can be used for extracting oil in the expansion oil tank and conveying the oil to the upper tank body; and oil in the upper tank body can flow back to the expansion oil tank through the oil return pipe under the action of self gravity. By means of the arrangement, oil in the upper box body and the expansion oil tank can circulate, the oil passing through the upper box body can return to the expansion oil tank by means of the gravity of the oil, then the oil amount in the upper box body is easier to control, and the phenomenon that gears stir oil can be effectively avoided; and meanwhile, the oil path of the steering oar is simplified.

Description

Technical Field

[0001] The invention relates to the field of ship propellers, and in particular to an oil supply method for an azimuthally rotating rudder propeller. Background Art

[0002] With the development of modern ship technology, the power density of ships is increasing day by day, especially in azimuth tugboats, which puts higher requirements on the volume of azimuth thrusters.

[0003] The prior art with publication number CN206668934U discloses a gearbox with adjustable gearbox oil level, which has a working state and a shutdown state, and includes a bevel gearbox with a transmission component arranged inside, an expansion oil tank and a lubricating oil pipe, the bevel gearbox and the expansion oil tank are provided with lubricating oil, the bevel gearbox is provided with an oil pressing device for pressing the lubricating oil in the gearbox into the expansion oil tank in the working state, the bottom of the expansion oil tank is provided with an oil drain hole connected to the bevel gearbox, and in the shutdown state, the lubricating oil in the expansion oil tank flows into the bevel gearbox through the oil drain hole and immerses all the transmission components in the bevel gearbox.

[0004] In the prior art, since the expansion oil tank is arranged above the gear box, the gear box is filled with oil, which makes it easy for the gears to stir the oil when the gear box is operating, thereby increasing the starting pressure of the propeller and reducing the transmission efficiency. Summary of the invention

[0005] In order to solve the problem of difficulty in controlling the oil amount in the upper box in the prior art, the purpose of the present invention is to provide a method for supplying oil to a full-rotation propeller, in which the oil in the upper box is easier to control and the gear oil stirring phenomenon can be effectively avoided.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a method for supplying oil to an omni-rotating propeller, the omni-rotating propeller comprising an upper housing and an expansion oil tank, the expansion oil tank providing oil for cooling and lubricating the transmission components in the upper housing, the expansion oil tank being arranged below the upper housing, a first oil suction pipe and a first oil return pipe being arranged between the expansion oil tank and the upper housing; the first oil suction pipe being able to extract the oil in the expansion oil tank and delivering the oil to the upper housing; the oil in the upper housing being able to flow back to the expansion oil tank through the return oil pipe under the action of its own gravity.

[0007] Preferably, an oil pump is installed on the first oil suction pipe, and the oil pump can deliver the oil in the expansion tank to the upper box body after being started.

[0008] Preferably, a filter, a cooler, a pressure relay and a first one-way valve are installed on a portion of the first oil suction pipe located between the oil pump and the oil outlet of the first oil suction pipe.

[0009] Preferably, an emergency pump group is also included; when the oil pump stops working or the oil in the upper box is at a low oil level, the emergency pump group starts, and the emergency pump group sends the oil in the expansion tank to the upper box to ensure that there is enough oil in the upper box.

[0010] Preferably, a second one-way valve is provided at the oil outlet of the emergency pump set.

[0011] Preferably, an electric control valve is installed on the first oil return pipe; the rate of change of the oil in the upper box is controlled by controlling the start and stop and the opening of the electric control valve.

[0012] Preferably, an overflow pipe is provided between the upper box body and the expansion oil tank, and the oil inlet of the overflow pipe is located above the oil inlet of the first oil return pipe.

[0013] Preferably, a first air vent is also installed on the expansion oil tank, and an air outlet of the first air vent is connected to an air filter.

[0014] The beneficial effects of the technical solution of the present invention are as follows: the oil in the upper box and the expansion tank can circulate back and forth, and the oil in the upper box can return to the expansion tank by its own gravity, thereby making it easier to control the amount of oil in the upper box and effectively avoiding the phenomenon of gear oil stirring; at the same time, it also simplifies the oil circuit of the full-rotation propeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connection structure between the expansion tank and the well box; Figure 2 It is a schematic diagram of the connection structure of the expansion tank, the hydraulic oil tank and the well box; Figure 3 This is a schematic diagram of the oil status in the upper box, expansion tank and well box after the oil pump is started; Figure 4 This is a schematic diagram of the oil status in the upper box, expansion tank and well box after the oil pump stops; Figure 5 This is the hydraulic principle diagram of the azimuth rudder propeller.

[0016] Reference numerals: 1, well box; 2, cover plate; 3, cavity; 4. Expansion tank; 41. First oil suction pipe; 411. Oil pump; 412. Filter; 413. Cooler; 414. Pressure relay; 415. First check valve; 416. Emergency pump set; 417. Second check valve; 42. First oil return pipe; 43. Electric control valve; 44. Overflow pipe; 45. Temperature sensor; 46. High liquid level alarm; 47. Low liquid level alarm; 48. Oil level gauge; 49. First air vent; 491. Air filter; 5. Upper housing; 51. Input shaft; 52. Upper output shaft; 6. Hydraulic oil tank; 7. Steering wheel assembly; 8. Lower housing; 81. Oil pressure screw mechanism. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0022] like Figure 1-5 The fully revolving propeller with an expansion oil tank is shown, comprising an upper box 5, a well box 1, a steering assembly 7 and a lower box 8. The upper box 5 is arranged above the well box 1, the steering assembly 7 is rotatably installed in the well box 1, the bottom of the steering assembly 7 is connected to the lower box 8, the input assembly in the upper box 5 is transmission-connected to the output assembly of the lower box 8, and an oil tank for supplying oil to the revolving propeller is arranged in the well box 1. Such an arrangement can reduce the external structure of the fully revolving propeller, thereby reducing the overall height of the propeller, and thereby making more reasonable use of the internal space of the propeller.

[0023] In this embodiment, the oil tank includes an expansion oil tank 4 and a hydraulic oil tank 6. Specifically, an upward opening is provided on the well box 1, and a cover plate 2 is fixed on the well box 1, and the cover plate 2 seals the opening; the steering assembly 7 includes a slewing bearing, the top of the slewing bearing is rotationally matched with the cover plate 2, and the top of the slewing bearing extends from the well box 1 and rotates; the well box 1, the cover plate 2 and the slewing bearing cooperate to form a cavity 3; the expansion oil tank 4 and the hydraulic oil tank 6 are arranged in the cavity 3, and the expansion oil tank 4 and the hydraulic oil tank 6 are both fixed to the well box 1. In this arrangement, the expansion oil tank 4 is built into the full-rotation propeller well box 1, and the transmission shaft in the well box 1 is isolated, thereby reducing oil bubbles caused by the rotation of the rotating shaft in the well box 1, and in the above scheme, the oil circulates between the well box 1 and the upper gear box.

[0024] In this embodiment, Figure 2 As shown, the volume of the hydraulic oil tank 6 is smaller than the volume of the expansion oil tank 4 .

[0025] In order to maintain the oil balance between the upper tank 5 and the expansion tank 4, in this embodiment, Figure 3 and Figure 4 As shown, the oil in the expansion oil tank 4 can be sent to the upper box body 5 through the first oil suction pipe 41, and lubricate the input components in the upper box body 5; a first oil return pipe 42 is also provided between the expansion oil tank 4 and the upper box body 5, and the oil in the upper box body 5 can flow back to the expansion oil tank 4 through the first oil return pipe 42; an overflow pipe 44 is also provided between the upper box body 5 and the expansion oil tank 4.

[0026] Specifically, Figures 3 to 5 As shown, the first oil suction pipe 41 is provided with an oil pump 411, and the oil pump 411 is used to pump the oil in the expansion tank 4 to the upper box 5; wherein the oil pump 411 is a belt pump or an electric pump. The first oil suction pipe between the oil pump 411 and the expansion tank 4 is provided with a filter 412, a cooler 413, a temperature sensor 45, a pressure relay 414 and a first check valve 415 in sequence. With such a configuration, the filter 412 and the cooler 413 can effectively ensure that the oil entering the upper box 5 is kept clean, the temperature and pressure in the circulating oil circuit can be ensured by the temperature sensor 45 and the pressure relay 414, and the oil backflow can be prevented by the first check valve 415, so that the oil in the working state can be kept stable.

[0027] Further preferably, Figures 3 to 5 As shown, an electric control valve 43 is provided on the first oil return pipe 42, and the change rate of the oil in the upper box 5 is controlled by controlling the start and stop and the opening of the electric control valve 43; the electric control valve 43 is an electric control ball valve.

[0028] Further preferably, Figure 3 and Figure 4 As shown, the oil inlet of the first oil suction pipe 41 is located below the lowest oil level line of the expansion oil tank 4.

[0029] In order to ensure that there is sufficient oil in each box, in this embodiment, the oil inlet of the first oil suction pipe 41 is located below the lowest oil level line of the expansion tank 4; the oil inlet of the first oil return pipe 42 is located below the oil outlet of the first oil suction pipe 41; the oil inlet of the overflow pipe 44 is located between the oil inlet of the first oil return pipe 42 and the oil outlet of the first oil suction pipe 41, and the oil inlet of the overflow pipe 44 is located above the input shaft in the input assembly.

[0030] In this embodiment, a lubricating oil circuit is provided on the upper housing 5, and the lubricating oil circuit lubricates the bearings and gears in the upper housing 5; the first one-way valve 415 on the oil suction pipe is provided on the part of the oil suction pipe between the lubricating oil circuit and the oil outlet of the oil suction pipe.

[0031] In this embodiment, Figure 5As shown, an emergency pump group 416 is also provided between the expansion tank 4 and the upper housing 5; after the main power source of the full-revolving propeller suddenly stops working, the oil pump 411 stops working accordingly; however, since the full-revolving propeller was still in a high-speed motion state at the previous moment, if there is no oil for lubrication and cooling, the temperature of the bearings and meshing gears will rise rapidly, and the high-speed rotation will cause the residual oil on the gears and bearings to be quickly thrown away, which will reduce the life of the bearings and gears and make the lubricating oil deteriorate and become more viscous; therefore, the emergency pump group 416 is started immediately, and the emergency pump group 416 extracts the oil in the expansion tank 4 and sends the oil to the upper housing 5 to cool and lubricate the transmission structure and the supporting structure in the upper housing 5; at this time, if the electric control valve is closed, the oil in the upper housing 5 can still flow back to the expansion tank 4 through the overflow pipe 44.

[0032] Further preferably, the emergency pump set 416 is a motor pump, which can be directly driven by a backup power supply.

[0033] Further preferably, the emergency pump group 416 is arranged in parallel with the oil pump 411 on the oil suction pipe, and the oil outlet of the emergency pump group 416 is connected to the part of the oil suction pipe located between the filter 412 and the oil pump 411; a second one-way valve 417 is provided at the oil outlet of the emergency pump group 416, and a third one-way valve is provided at the oil outlet of the oil pump 411.

[0034] In order to facilitate monitoring of the oil volume in each tank, in this embodiment, the upper tank 5, the expansion tank 4 and the hydraulic tank 6 are all provided with an oil level gauge 48 and a high liquid level alarm 46; the expansion tank 4 and the hydraulic tank 6 are also provided with a low liquid level alarm 47 for detecting the liquid level; wherein the oil level gauge 48 is a mechanical oil level gauge 48. With such a configuration, the oil position in the tank can be immediately known through the oil level gauge 48, and the oil in the upper tank 5 can be replenished in time through the alarm.

[0035] In this embodiment, ribs are provided on the inner wall of the well box 1 to make the well box 1 stronger; the well box 1 bears the weight of the entire rudder propeller, the propeller hydrodynamic thrust and the rudder lateral thrust, thereby improving the reliability of the entire rudder propeller system.

[0036] In this embodiment, a first air vent 49 is installed on both the expansion oil tank 4 and the hydraulic oil tank 6 , and an air filter 491 is installed at the air outlet of the first air vent.

[0037] In this embodiment, an oil-pressing screw mechanism 81 is further included. The oil-pressing screw mechanism 81 can exchange oil between the upper box 5 and the lower box 8 to ensure that there is sufficient oil in the upper box 5 and the lower box 8.

[0038] In this embodiment, a second oil suction pipe, a second oil return pipe and a second air vent are provided on the hydraulic oil tank 6. The hydraulic oil tank 6 delivers the oil to the steering drive assembly of the full-turn propeller through the second oil suction pipe. The second oil return pipe delivers the oil of the steering drive assembly back to the second oil return pipe. The air outlet of the second air vent is connected to the air filter 412.

[0039] In this embodiment, the input assembly includes an input shaft 51 and an upper output shaft 52, the input shaft 51 is arranged horizontally, the upper output shaft 52 is arranged vertically, the input shaft 51 and the output shaft 52 are driven by gear meshing, the upper output shaft extends into the slewing bearing, the slewing bearing is provided with a rotatable transmission shaft, and the transmission shaft is connected to the upper output shaft by a spline sleeve; the output assembly includes a lower output shaft, the lower output shaft is rotatably mounted on the lower box 8, the lower output shaft and the transmission shaft are driven by gear meshing, one end of the lower output shaft extends from the lower box 8 and is provided with a propeller. The steering assembly 7 also includes a steering drive assembly, the steering drive rod assembly includes a steering gear rotatably mounted on the cover plate 2, the steering gear is driven by the slewing bearing, and the motor is installed on the cover plate 2 and connected to the steering gear. Among them, the structure of the full-rotation steering propeller can refer to the patent technical documents with publication numbers CN107444603A, CN216140161U and CN209814250U. Example

[0040] The difference from the first embodiment is that the hydraulic oil tank 6 is installed above the well box 1, and the cavity 3 in the well box 1 is used to place the expansion oil tank 4. The other parts of this embodiment are the same as those of the first embodiment. Example

[0041] A method for supplying oil to a fully rotating propeller with an expansion oil tank 4 built in the above-mentioned embodiment 1 or embodiment 2, When the main power source of the full-revolving propeller is started, the oil pump 411 works and the electronically controlled ball valve opens; the oil pump 411 pumps the oil in the expansion tank 4 to the upper box body 5 to lubricate the bearings and gears in the upper box body 5; when the oil in the upper box body 5 rises to the oil inlet of the return oil pipe, the oil in the upper box body 5 automatically flows into the expansion tank 4 under the action of gravity; and then the oil circulates between the upper box body 5 and the expansion tank 4.

[0042] During the operation of the main power source, if the oil pressure in the lubricating oil circuit of the upper box body is lower than the warning value, the emergency pump group 416 starts automatically; after the main power source stops, the emergency pump group stops working accordingly.

[0043] When the main power source stops working, the emergency pump group starts; then when the upper liquid level high alarm of the upper tank is activated, the emergency pump group stops working, and the electric control valve on the first oil return pipe of the expansion tank 4 is closed, so that enough oil for lubrication is stored in the upper tank 5. Among them, the liquid level in the upper tank of the rudder propeller rises, and the liquid level in the expansion tank drops.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A method for supplying oil to an azimuth propeller, the azimuth propeller comprising an upper housing (5) and an expansion tank (4), the expansion tank (4) providing oil for cooling and lubricating a transmission component in the upper housing (5), characterized in that: The expansion oil tank (4) is arranged below the upper box body (5), and a first oil suction pipe (41) and a first oil return pipe (42) are arranged between the expansion oil tank (4) and the upper box body (5); The first oil suction pipe (41) is capable of extracting oil from the expansion oil tank (4) and delivering the oil to the upper tank body (5); The oil in the upper box body (5) can flow back to the expansion oil tank (4) through the oil return pipe (42) under the action of its own gravity.

2. The method for supplying oil to an azimuth propeller according to claim 1, characterized in that: An oil pump (411) is installed on the first oil suction pipe (41), and when the oil pump (411) is started, the oil in the expansion oil tank (4) can be delivered to the upper tank body (5).

3. The method for supplying oil to an azimuth propeller according to claim 2, characterized in that: A filter (412), a cooler (413), a pressure relay (414) and a first check valve (415) are installed on a portion of the first oil suction pipe (41) between the oil pump (411) and the oil outlet of the first oil suction pipe (41).

4. The method for supplying oil to an azimuth propeller according to claim 2, characterized in that: The system also includes an emergency pump group (416); when the oil pump (411) stops working or the oil in the upper box (5) is at a low oil level, the emergency pump group (416) starts to deliver the oil in the expansion tank (4) to the upper box (5), thereby ensuring that there is sufficient oil in the upper box (5).

5. The method for supplying oil to an azimuth propeller according to claim 4, characterized in that: A second one-way valve (417) is provided at the oil outlet of the emergency pump group (416).

6. The method for supplying oil to an azimuth propeller according to claim 1, characterized in that: An electric control valve (43) is installed on the first oil return pipe (42); the change rate of the oil in the upper box (5) is controlled by controlling the start and stop and the opening of the electric control valve (43).

7. The method for supplying oil to an azimuth propeller according to claim 1, characterized in that: An overflow pipe (44) is provided between the upper box body (5) and the expansion oil tank (4), and an oil inlet of the overflow pipe (44) is located above the oil inlet of the first oil return pipe (42).

8. The method for supplying oil to an azimuth propeller according to claim 1, characterized in that: A first air vent pipe (49) is also mounted on the expansion oil tank (4), and an air outlet of the first air vent pipe (49) is connected to an air filter (491).

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