Non-contact connection propeller transmission structure of marine in-cabin machine

Abstract

The utility model relates to a non-contact connection propeller transmission structure of a marine in-cabin machine. The non-contact connection propeller transmission structure comprises a ship body and a power assembly, the ship body is provided with a fixing groove communicated with the outside, a fixing pipe is arranged in the fixing groove, a propeller for bearing power output is arranged in the fixing pipe, a sealing part used for sealing communication between the ship body and the outside is arranged in the fixing pipe, and a sealing gasket is arranged outside the fixing pipe and at least used for filling a gap between the fixing pipe and the fixing groove. One purpose of the utility model is to improve the waterproof performance of the motor so as to prolong the service life of the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to ship power, more particularly, the utility model relates to a non-contact connection propeller transmission structure of cabin engine for ship. BACKGROUND

[0002] The outboard motor is relatively common, and is powered by an internal combustion engine or an electric motor. With the environmental protection requirements, the outboard motor powered by the electric motor has been developed accordingly. With the maturity of the direct-current brushless motor technology and the progress of the battery technology, the electric outboard motor has also entered the selection range of people.

[0003] The existing electric outboard motor is directly linked with the motor shaft, and the rotation of the motor shaft drives the propeller to rotate. In the use process, the working environment of the motor is always underwater, and the waterproof function of the motor is particularly important. UTILITY MODEL CONTENTS

[0004] An object of the utility model is to improve the waterproof performance of the motor and prolong the service life of the motor.

[0005] According to one aspect of the utility model, a non-contact connection propeller transmission structure of cabin engine for ship is provided, which comprises a ship body, the ship body is used for providing a power assembly for power; the ship body is provided with a fixed groove in communication with the outside world, the fixed groove is provided with a fixed pipe, the fixed pipe is provided with a propeller for receiving power output, the fixed pipe is provided with a sealing part for sealing the communication between the ship body and the outside world, the fixed pipe is provided with a sealing gasket outside, and the sealing gasket is used to fill the gap between the fixed pipe and the fixed groove.

[0006] Through the scheme, the innovative sealing structure adopts a multilayer composite sealing system, the three-element ethylene-propylene rubber sealing gasket is arranged at the combination part of the fixed pipe and the ship body, and at least IP68-level waterproof is realized by cooperating with the gas-liquid two-phase sealing assembly inside the fixed pipe.

[0007] Optionally, the sealing part comprises a waterproof oil seal and a waterproof step, the waterproof oil seal is arranged in the fixed pipe, and the two sides of the waterproof oil seal are respectively in abutment with the inner wall of the fixed pipe and the outer wall of the propeller.

[0008] Optionally, the waterproof step is fixedly arranged on the propeller, and the waterproof step is in abutment with the waterproof oil seal.

[0009] The waterproof oil seal and the double contact interfaces formed by the inner wall of the fixed pipe and the outer wall of the propeller constitute a bidirectional radial sealing system, which can withstand more axial water pressure impact, realize dynamic sealing with an axial displacement of ±0.8mm at a propeller speed of 3000rpm, and reduce the leakage rate by more than 90% compared with a single-sided sealing structure; the optional waterproof step and the waterproof oil seal form a stepped multi-stage sealing, and when a 0.15mm gap is generated on the main sealing surface due to wear, the waterproof step can automatically compensate to form a second sealing barrier.

[0010] Optionally, a fixed ring is arranged on the fixed pipe, and a sealing ring is arranged on one side of the fixed ring close to the ship body, and an air cavity is formed between the sealing ring and the sealing pad.

[0011] Through the scheme, the air cavity forms a micro-positive pressure environment of 0.02-0.05MPa, generates reverse water flow resistance through Bernoulli effect, reduces the penetration speed of external water pressure, and improves the waterproof reliability by more than 5 times compared with a solid sealing structure; the sealing ring and the sealing pad form a "hard sealing + soft sealing + air sealing" triple protection system, and the air cavity can still maintain the IPX8 protection level when a single seal fails.

[0012] Optionally, a plurality of fixing holes are arranged on the fixed ring, a locking bolt is threadedly connected in each fixing hole, a threaded blind hole is formed in a position corresponding to the fixing hole on the ship body, and a relief hole is formed in a position corresponding to the locking bolt on the sealing ring.

[0013] Optionally, the propeller comprises a rotating shaft and blades, each blade has a fixed end close to the rotating shaft and a free end away from the rotating shaft, and one side of the blade is chamfered to form a chamfered slope.

[0014] Through the scheme, the chamfered slope improves the water flow pressure gradient distribution, moves the lowest pressure point on the blade surface forward, increases the cavitation inception critical speed to 18 knots (the traditional design is 14 knots), reduces the cavitation area, significantly reduces the cavitation corrosion risk, and prolongs the service life of the propeller; the additional flow guiding effect of the chamfered slope can compensate for the dynamic imbalance caused by manufacturing tolerances, improve the balance accuracy compared with the design without chamfering, reduce the shaft vibration mode, and reduce the water inlet probability.

[0015] Optionally, the fixed ring and the fixed pipe are integrally formed.

[0016] Optionally, a strong magnetic steel for transmitting power is arranged between the power assembly and the propeller.

[0017] By the scheme, the non-contact power transmission design is adopted, the power assembly and the propeller are driven through the magnetic coupling or electromagnetic induction principle, the friction loss existing in the traditional mechanical shaft system is effectively eliminated, the transmission efficiency is improved by about 15%-20%, the shaft seal leakage risk is completely avoided, and the power loss is reduced to less than 1 / 3 of the traditional structure.

[0018] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 It is a kind of whole schematic diagram of non-contact connection propeller transmission structure of marine cabin machine.

[0021] Figure 2 It is a partial schematic diagram of protruding propeller of non-contact connection propeller transmission structure of marine cabin machine.

[0022] Figure 3 It is a sectional view of non-contact connection propeller transmission structure of marine cabin machine.

[0023] Figure 4 It is Figure 3 B is a partial enlarged view.

[0024] BRIEF DESCRIPTION OF DRAWINGS: 1, ship body;11, engine room;13, motor;14, fixed groove;2, fixed part;21, fixed pipe;22, fixed ring;23, locking bolt;3, sealing pad;4, sealing ring;51, ball bearing;61, waterproof oil seal;62, waterproof step;7, propeller;71, rotating shaft;72, blade;8, stern;81, electric boat propeller;9, strong magnetic steel.

[0025] Wherein, same components in the drawings are indicated by same reference numerals;The drawings are not drawn according to actual proportion. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the present application or its applications or uses.

[0028] Techniques and equipment known to those of ordinary skill in the art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0029] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values.

[0030] It should be noted that like reference numerals and letters refer to like items throughout the several views, and thus a discussion of the same in one view is typically unnecessary in other views.

[0031] Example 1

[0032] The utility model provides a kind of marine cabin machine non-contact connection propeller transmission structure, as shown in Figures 1-3 It is shown in the drawing, including ship body 1, ship body 1 is provided with machine cabin 11, machine cabin 11 is provided with the motor 13 for providing the power of ship body 1;Ship body 1 is provided with fixed groove 14 corresponding to one side of machine cabin 11, fixed groove 14 is coaxial with the output shaft of motor 13, and fixed groove 14 of ship body 1 is provided with fixed part 2, fixed part 2 includes fixed pipe 21 and fixed ring 22, the axis of fixed pipe 21 is coaxial with fixed groove 14, and fixed pipe 21 is provided with sealing gasket 3 outside, and sealing gasket 3 is respectively with the inner wall of fixed groove 14 and the outer wall of fixed pipe 21 mutually abuts;Fixed pipe 21 is provided with fixed ring 22 on the side away from motor 13, and fixed ring 22 is coaxial with fixed pipe 21, and fixed ring 22 is integrally formed with fixed pipe 21, and one side of fixed ring 22 is mutually abutted with the outer surface of ship body 1;Multiple fixed holes are circumferentially distributed on fixed ring 22, and the axis of fixed hole is mutually parallel with fixed ring 22;Multiple fixed holes are all screw-threaded with locking bolt 23, and ship body 1 is provided with threaded blind hole corresponding to the position of fixed hole, and locking bolt 23 is screw-threaded with threaded blind hole, and the relative position of fixed ring 22 and ship body 1 is limited from changing, to further limit the position of fixed part 2;Fixed ring 22 is provided with sealing ring 4 on the side close to ship body 1, and sealing ring 4 is provided with let hole corresponding to the position of locking bolt 23, and the outer diameter of sealing ring 4 is same with the diameter of fixed ring 22.

[0033] In use, the fixing groove 14 is provided with a fixing pipe 21, and a sealing gasket 3 is arranged between the fixing pipe 21 and the fixing groove 14. The sealing gasket 3 includes but is not limited to a commonly used ethylene ring and a ternary ethylene rubber on the market. The sealing gasket 3 is relatively soft, fills the gap between the fixing groove 14 and the fixing pipe 21, and reduces the probability of water entering the fixing pipe 21 and the fixing groove 14 when the ship body 1 is launched. The fixing ring 22 is integrally formed with the fixing pipe 21, and the fixing ring 22 and the ship body 1 abut each other. A sealing ring 4 is arranged, and the sealing ring 4 is provided with a clearance hole corresponding to the position of the locking bolt 23. The sealing ring 4, the fixing ring 22 and the ship body 1 form an air cavity. The locking bolt 23 is matched with the threaded blind hole, and the locking bolt 23 is arranged in the clearance hole of the sealing ring 4. The probability of water entering the fixing hole due to threaded connection is reduced. When the ship body 1 is launched, the sealing ring 4, the sealing gasket 3, the fixing ring 22 and the ship body 1 form an air cavity, the overall waterproof level is improved, and the probability of water entering the motor 13 is reduced.

[0034] In use, the fixing ring 22 is fixed by the locking bolt 23 so that it can be disassembled. When the fixing ring 22 and the fixing pipe 21 are obviously worn and depreciated after long-term use, the standby fixing ring 22 can be taken out. The locking bolt 23 is rotated out of the original fixing ring 22 and is disassembled. Then the locking bolt 23 is rotated into the standby fixing ring 22 and is matched with the threaded blind hole of the ship body 1, so that the replacement of the fixing ring 22 is completed.

[0035] As shown in Figures 1-4 The fixing pipe 21 is provided with a rotating shaft 71, and the rotating shaft 71 is coaxial with the fixing pipe 21. A bearing placing groove is arranged in the fixing pipe 21 and is coaxial with the fixing pipe 21. A coaxial ball bearing 51 is arranged in the bearing placing groove, and the inside of the ball bearing 51 is matched with the rotating shaft 71. The fixing pipe 21 is provided with an oil seal groove corresponding to the two sides of the bearing placing groove. The oil seal groove is provided with a waterproof oil seal 61, and the inner wall of the waterproof oil seal 61 is matched with the rotating shaft 71. The rotating shaft 71 is provided with a waterproof step 62, and the waterproof step 62 is coaxial with the rotating shaft 71. The radius of the waterproof step 62 is the same as that of the waterproof oil seal 61. The waterproof step 62 is placed away from the motor 13, and the side of the waterproof step 62 close to the motor 13 is close to the waterproof oil seal 61.

[0036] In use, the rotating shaft 71 is matched with the inner wall of the ball bearing 51. The two waterproof oil seals 61 arranged in the oil seal groove are matched with the rotating shaft 71, and the waterproof step 62 is arranged outside the waterproof oil seal 61, so that the first waterproof effect is achieved. When rotating, the water flow is rotated synchronously, the probability of water entering the inside of the machine body is reduced, and the waterproof effect of the rotating shaft 71 is achieved.

[0037] As shown in Figures 1-4As shown, the propeller 7 includes a rotating shaft 71 and blades 72, the rotating shaft 71 is fixed with a plurality of circumferentially spaced blades 72 at one end away from the motor 13, and the example in the figure is four, the four blades 72 are circumferentially uniformly spaced, each blade 72 has a fixed end close to the rotating shaft 71, and a free end away from the rotating shaft 71, and the trailing edge of any blade 72 is chamfered to form a chamfered slope.

[0038] In use, the upper surface of the trailing edge of each blade 72 has an inclination angle, and the purpose of providing the chamfered slope is to make the water flow contact the blade 72 relatively gentle, reduce the generation of sound; and unlike the right-angled trailing edge, the fishing line and seaweed have no obvious force point on the trailing edge of the blade 72; reduce the probability of entanglement of fishing line and seaweed on the blade 72 of the propeller 7.

[0039] As shown, Figures 1-4 The hull 1 is integrally formed with a stern 8 corresponding to one side of the blade 72, the stern 8 is provided with an electric boat paddle 81 for controlling the direction of the hull 1, and the axis of the electric boat paddle 81 is perpendicular to the rotating shaft 71.

[0040] As a preferred, the electric boat paddle 81 is arranged on one side of the stern 8, the number of electric boat paddles 81 can be 1, arranged on one side of the propeller 7, which can also be 2, distributed on both sides of the stern 8.

[0041] In use, the electric boat paddle 81 is located on the side of the propeller 7, reducing the situation that the fishing line and seaweed enter the propeller 7 with the water flow when the propeller 7 rotates to discharge water, causing the blade 72 to be entangled.

[0042] As shown, Figures 1-4 The motor 13 output shaft and the rotating shaft 71 are provided with a plurality of stages of strong magnetic steel 9, which are respectively fixed on the sides of the motor 13 output shaft and the rotating shaft 71 close to each other, and are arranged in stages.

[0043] As a preferred, the strong magnetic steel 9 is distributed at equal intervals in the circumferential direction of the motor 13 output shaft and the rotating shaft 71, and it can be understood that the number of strong magnetic steel 9 is not limited, which can be one or more than one.

[0044] In use, the strong magnetic steel 9 between the motor 13 output shaft and the rotating shaft 71 is magnetically attracted to each other, when the motor 13 output shaft rotates, the strong magnetic steel 9 arranged on the motor 13 output shaft rotates, and then drives the corresponding strong magnetic steel 9 on the rotating shaft 71 to rotate, realizes the power output of the motor 13, uses the strong magnetic steel 9 for power transmission, when the blade 72 of the propeller 7 is entangled by the fishing line and seaweed and cannot rotate, the motor 13 output shaft cannot rotate, causing the motor 13 to be damaged, and when the blade 72 cannot rotate, the rotating shaft 71 is synchronous and stationary, and the probability of water entering is reduced by using the waterproof oil seal 61.

[0045] In summary, by the combination design of the fixed tube 21 in the fixed groove 14 and the sealing gasket 3, the gap between the fixed tube 21 and the fixed groove 14 is effectively filled, and the possibility of water penetration when the ship body 1 is launched is reduced. At the same time, the sealing ring 4 design between the fixed ring 22 and the ship body 1, and the cooperation of the locking bolt 23 and the threaded blind hole, further enhances the waterproof effect, forms an air cavity, effectively improves the overall waterproof level, and reduces the risk of damage to the motor 13 due to water ingress.

[0046] The rotating shaft 71 is matched with the fixed tube 21 through the ball bearing 51, and the waterproof oil seal 61 is arranged in the oil seal groove, which ensures the waterproof effect of the rotating shaft 71 during rotation, and guarantees the smooth operation of the rotating shaft 71. This design effectively prevents water erosion of the rotating shaft 71, improves the transmission efficiency and service life.

[0047] The power system uses non-contact power transmission, and the power transmission is realized through the strong magnetic steel 9 between the output shaft of the motor 13 and the rotating shaft 71, which realizes the non-contact connection mode. This design not only improves the efficiency of power transmission, but also protects the motor 13 from damage when the blade 72 is wound and cannot rotate, and enhances the reliability and safety of the entire transmission structure.

[0048] The electric boat paddle 81 arranged at the stern 8 not only helps to control the direction of the ship body 1, but also reduces the risk of the fish line and the water grass entering the propeller 7 with the water flow and winding the blade 72, further improving the controllability and safety of the ship body 1

[0049] The design of the blade 72 with the edge chamfered inclined surface not only reduces the noise generated when the water flow contacts the blade 72, but also reduces the probability of the fish line and the seaweed winding on the blade 72, improving the reliability and safety of the propeller 7.

[0050] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A non-contact connection propeller transmission structure for a marine inboard engine, characterized by, The utility model provides a kind of ship, including hull (1), the hull (1) is used to provide powered power assembly;The hull (1) is provided with fixed groove (14) with communication with outside, fixed pipe (21) is provided in the fixed groove (14), propeller (7) is provided in the fixed pipe (21) and is arranged to receive power output, sealing portion is arranged in the fixed pipe (21) for sealing the hull (1) and communication with outside, sealing pad (3) is arranged outside the fixed pipe (21), and the sealing pad (3) at least is used to fill the gap between the fixed pipe (21) and the fixed groove (14).

2. A non-contact connection propeller transmission structure for a marine inboard engine according to claim 1, characterized in that, The sealing portion includes waterproof oil seal (61) and waterproof step (62), the waterproof oil seal (61) is arranged in the fixed pipe (21), and the waterproof oil seal (61) is respectively abutted with the inner wall of the fixed pipe (21) and the outer wall of the propeller (7) on both sides.

3. A non-contact connection propeller drive structure for a marine inboard engine according to claim 2, characterized in that, The waterproof step (62) is fixedly arranged on the propeller (7), and the waterproof step (62) is abutted with the waterproof oil seal (61).

4. A non-contact connection propeller transmission structure for a marine inboard engine according to claim 1, characterized in that, The fixed pipe (21) is provided with a fixed ring (22), and the fixed ring (22) is provided with a sealing ring (4) close to one side of the hull (1), and the sealing ring (4) and the sealing pad (3) form an air cavity.

5. A non-contact connection propeller drive structure for a marine inboard engine according to claim 4, wherein The fixed ring (22) is provided with a plurality of fixing holes, and the fixing holes are all threadedly connected with locking bolts (23), the hull (1) is provided with a threaded blind hole corresponding to the position of the fixing hole, and the locking bolt (23) is threadedly connected with the threaded blind hole.

6. A non-contact connection propeller drive structure for a marine inboard engine according to claim 1, wherein The propeller (7) includes a rotating shaft (71) and a blade (72), each blade (72) has a fixed end close to the rotating shaft (71) and a free end away from the rotating shaft (71), and the edge of any blade (72) is chamfered to form a chamfered slope.

7. A non-contact connection propeller drive structure for a marine inboard engine according to claim 4, wherein The fixed ring (22) and the fixed pipe (21) are integrally formed.

8. A non-contact connection propeller drive structure for a marine inboard engine according to claim 1, characterized in that, The power assembly and the propeller (7) are provided with a strong magnetic steel (9) for receiving power transmission.

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