Ship propulsion device

Abstract

The invention discloses a ship propulsion device with reliable operation, high propulsion efficiency and low manufacturing cost, comprising a hollow hub motor and a front fairing and a rear fairing arranged at both ends of the hollow hub motor, the hollow hub motor comprising a shell and a cylindrical fairing rotatably arranged in the shell, the inner wall of the shell is provided with a motor stator, and the outer wall of the fairing rotatably arranged with a motor rotor; at least three clutch seats are evenly distributed on the inner wall of the fairing rotatably arranged around a central axis in a circumferential direction; a clutch gear ring with a center line parallel to the radial direction of the fairing rotatably arranged on the clutch seat, a mounting hole is provided on the clutch seat at the center line of the clutch gear ring, a clutch positioning column is penetrated through the mounting hole, an adjusting gear disk and a blade unit are detachably sleeved on the clutch positioning column in sequence, and the rear fairing rotatably comprises a cylindrical cover shell connected to the hollow hub motor, a center column is provided at the center line of the cover shell, at least four spiral plates with edges connected to the inner wall of the cover shell are circumferentially provided on the center column, and the spiral direction of the spiral plate is opposite to the spiral direction of the driving blade.

Description

Technical Field

[0001] The present invention relates to a ship propulsion device, in particular to a hollow hub propulsion device with rectification and supercharging, belonging to the technical field of ship propulsion. Background Art

[0002] At present, the installation method of the propeller blades of the hollow hub propeller is to fix them in the guide box of the hollow hub propeller motor rotor. The radial angle of the blades relative to the motor rotor is fixed, that is, the pitch of the propeller is fixed and cannot be adjusted.

[0003] For ships of the same class, the matching of the helix angle in the propeller and the ship type is very different due to the different hull designs. The pitch increases with the increase of the helix angle. In other words, for the same blade, changing the helix angle in the propeller means changing the pitch of the propeller. In product production, the helix angle of the propeller is designed based on the drawings, and the optimal helix angle is obtained through theoretical calculation. Since there is an error between the actual ship and the theoretical design, the optimal helix angle of the actual ship during the driving process cannot be completely consistent with the theoretical design, and sometimes the error is relatively large. If the helix angle of the propeller is large, the motor torque increases, which can easily cause the motor to stall; if the helix angle of the propeller is small, the rated power of the motor cannot be fully absorbed by the propeller, thereby generating reactive power, which also reduces the working efficiency of the motor and affects the quality of the power grid in the ship power station.

[0004] Although the above problems can be solved by adjustable propellers, the adjustable propeller mechanism is complex and expensive. In particular, the inner hole of the motor rotor of the hollow hub propulsion device is the mounting hole of the propeller, so there is no space to install the blade rotation mechanism of the adjustable propeller.

[0005] In addition, since the propeller transports the water flow through rotational inertia, the outlet water column is spiral-shaped. Its rotational component cannot effectively propel the ship forward and is a reactive component, which also reduces the propulsion efficiency. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a ship propulsion device which has reliable operation, high propulsion efficiency and low manufacturing cost.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a ship propulsion device, including an empty hub motor and a front fairing and a rear fairing arranged at both ends of the empty hub motor, the empty hub motor includes a shell and a cylindrical fairing rotatably arranged in the shell, the inner wall of the shell is provided with a motor stator, and the outer wall of the fairing rotatably arranged is provided with a motor rotor;

[0008] No less than three clutch seats are evenly distributed on the inner wall of the guide box around the central axis in the circumferential direction; the clutch seat is provided with a clutch gear ring whose center line is parallel to the radial direction of the guide box, and a mounting hole is provided on the clutch seat at the center line of the clutch gear ring, and a clutch positioning column is passed through the mounting hole, and an adjustment gear disc and a blade unit are detachably mounted on the clutch positioning column in sequence, and an upper gear ring meshing with the clutch gear ring is provided on the adjustment gear disc, and two first arc-shaped adjustment holes with the central axis of the clutch positioning column as the center are relatively provided on the adjustment gear disc, and a threaded positioning hole respectively matched with the two first adjustment holes is provided on the clutch seat; a lower gear ring coaxial with the upper gear ring is provided on the adjustment gear disc, and the tooth shape of the lower gear ring is consistent with that of the upper gear ring, and the tooth positions of the upper gear ring and the lower gear ring correspond one to one, or two adjacent teeth between the upper gear ring and the lower gear ring form a 3 / 4 tooth shape deflection angle, or a 1 / 2 tooth shape deflection angle, or a 1 / 4 tooth shape deflection angle in the radial direction;

[0009] The blade unit includes a blade mounting seat, a connecting hole matched with the clutch positioning column is provided on the blade mounting seat, two arc-shaped second adjustment holes respectively matched with the two first adjustment holes with the central axis of the clutch positioning column as the center of the circle are provided on the blade mounting seat, a blade mounting seat matched with the lower gear ring of the adjustment toothed disk is provided on the blade mounting seat, and a driving blade is provided on the blade mounting seat; two locking screws passing through the blade mounting seat and the adjustment toothed disk are respectively embedded in the two threaded positioning holes to position and lock the blade unit and the adjustment toothed disk, so that each driving blade is distributed in a spiral shape;

[0010] The rear air guide cover includes a cylindrical cover shell connected to the hollow hub motor, a center column is provided at the center line of the cover shell, and at least four spiral plates with edges connected to the inner wall of the cover shell are provided circumferentially on the center column. The spiral direction of the spiral plates is opposite to the spiral direction of the driving blades, the pitch between the spiral plates is the same as the pitch between the driving blades, and the axial length of the spiral plates along the center column is the same as the axial length of the driving blades.

[0011] As a preferred solution, the cross-section of one end of the central column close to the guide function is a quadratic parabola.

[0012] As a preferred solution, the spiral hole formed by two adjacent spiral plates, the central column and the cover is a rectifying box, and the number of rectifying boxes is twice the number of blades plus 1 or minus 1.

[0013] As a preferred solution, the central angle of the line connecting the two ends of the first adjustment hole and the center of the adjustment gear disc is 15°.

[0014] As a preferred solution, the cooperation between the mounting hole on the clutch seat and the clutch positioning column is a transition fit; the cooperation between the connecting hole on the blade mounting seat and the clutch positioning column is a transition fit.

[0015] As a preferred solution, the central angle of a line connecting the two ends of the second adjustment hole and the center of the blade mounting seat is 90°.

[0016] As a preferred solution, a graduation line and a graduation value are provided on the axial outer circumference of the blade mounting seat, and a graduation indicating line indicating the helical angle value of the blade is provided on the axial outer circumference of the clutch seat.

[0017] As a preferred solution, the number of teeth on the upper gear ring and the lower gear ring is no less than 100.

[0018] The beneficial effects of the present invention are:

[0019] The driving blade pitch of the present invention is easy to adjust during the installation process. In actual work, by adjusting the driving blade pitch, not only can the optimal power matching between the ship propeller and the motor be met, but it can also adapt to ships of the same level and different ship types, avoiding the design of one propeller only adapting to one ship type, thereby improving the use range and efficiency of the propeller, and the manufacturing cost is low. The present invention utilizes a toothed clutch to fix the driving blades of the propeller in the guide box of the hollow hub propeller. The toothed clutch can not only make the helical angle of the propeller more accurately controlled, but also the toothed clutch can effectively transmit the torque of the propeller blades by utilizing the meshing tooth profile. An adjusting toothed disc is added between the toothed clutches. After the upper and lower tooth surfaces of the adjusting toothed disc are superimposed, the radial deflection angle formed by two adjacent teeth between the upper and lower gear rings can be set and matched, thereby accurately adjusting the pitch of the propeller, ensuring the safety of the motor and greatly improving the useful work. Furthermore, by arranging a fairing box structure in the rear guide cover, the rotating water flow discharged from the propulsion device is rectified into a straight water flow, that is, useless work is converted into useful work, further improving the propulsion efficiency of the ship.

[0020] Since the cross-section of one end of the center column close to the guide function is a quadratic parabola, it can effectively reduce water resistance to improve the propulsion efficiency of the ship.

[0021] Since the spiral manhole formed by the two adjacent spiral plates, the central column and the cover is a straightening manifold, the number of straightening manifolds is twice the number of blades plus 1 or minus 1, which can better straighten the rotating water flow out of the propulsion device into a straight water flow, reduce the water flow energy loss, and further improve the propulsion efficiency of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , Schematic diagram of ship propulsion device structure

[0023] Figure 2 , Schematic diagram of the structure of the adjustment gear disc

[0024] Figure 3 , Main structural diagram of the blade unit

[0025] Figure 4 , Schematic diagram of the top view of the blade unit

[0026] Figure 5 , right side view of the rear air shroud

[0027] In the figure: 1, rear air guide cover, 2, housing, 3, motor stator, 4, motor rotor, 5, adjustment gear plate, 51, upper gear ring, 52, first adjustment hole, 53, gear plate positioning hole, 54, gear plate groove, 55, lower gear ring, 6, blade unit, 61, blade mounting seat, 62, blade gear plate, 63, connecting hole, 64, blade groove, 65, driving blade, 66, second adjustment hole, 7, clutch positioning column, 8, guide box, 9, front air guide cover, 10, empty hub motor, 11, clutch seat, 12, spiral plate, 13, center column, 14, cover, 15, rectifier box. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-5 As shown, a ship propulsion device includes an empty hub motor 10 and a front fairing 9 and a rear fairing 1 arranged at both ends of the empty hub motor 10. The empty hub motor 10 includes a housing 2 and a cylindrical fairing 8 rotatably arranged in the housing 2. A motor stator 3 is arranged on the inner wall of the housing 2, and a motor rotor 4 is arranged on the outer wall of the fairing 8.

[0030] No less than three clutch seats 11 are evenly distributed around the central axis on the inner wall of the guide box 8; the clutch seat 11 is provided with a clutch gear ring whose center line is parallel to the radial direction of the guide box 8, and a mounting hole is provided on the clutch seat 11 at the center line of the clutch gear ring, and a clutch positioning column 7 is passed through the mounting hole, and the mounting hole on the clutch seat 11 and the clutch positioning column 7 are matched in a transitional manner. The clutch positioning column 7 is detachably sleeved with an adjustment gear disc 5 and a blade unit 6 in sequence.

[0031] The adjusting toothed disc 5 is provided with a toothed disc positioning hole 53 that matches the clutch positioning column 7. The adjusting toothed disc 5 is provided with an upper gear ring 51 that meshes with the clutch gear ring, and the adjusting toothed disc 5 is provided with two first arc-shaped adjusting holes 52 with the central axis of the clutch positioning column 7 as the center of the circle, and the central angle of the line connecting the two ends of the first adjusting hole 52 and the center of the adjusting toothed disc 5 is 15°.

[0032] The clutch seat 11 is provided with threaded positioning holes respectively matched with the two first adjustment holes 52; the adjustment toothed disc 5 is provided with a lower toothed disc 55 coaxial with the upper toothed disc 51, the tooth shape of the lower toothed disc 55 is consistent with that of the upper toothed disc 51, and the number of teeth of the upper toothed disc 51 and the lower toothed disc 55 is 120. The tooth positions of the upper toothed disc 51 and the lower toothed disc 55 correspond one to one, or the radial direction of the two adjacent teeth between the upper toothed disc 51 and the lower toothed disc 55 forms a 3 / 4 toothed disc deflection angle, or a 1 / 2 toothed disc deflection angle, or a 1 / 4 toothed disc deflection angle; the clutch positioning column 7 is provided with an axial through hole, and the clutch positioning column 7 is provided with a plurality of radial through holes corresponding to the upper toothed disc 51 and the lower toothed disc 55, which are connected with the axial through hole. A toothed disc groove 54 is provided on the upper surface of the adjustment toothed disc 5 on the inner side of the upper toothed disc 51, and a toothed disc groove 54 is also provided on the lower surface of the adjustment toothed disc 5 on the inner side of the lower toothed disc 55.

[0033] The blade unit 6 includes a blade mounting seat 61, on which a connecting hole 63 is provided to match the clutch positioning column 7, and the matching between the connecting hole 63 on the blade mounting seat 61 and the clutch positioning column 7 is a transitional matching. The blade mounting seat 61 is provided with two arc-shaped second adjustment holes 66 with the central axis of the clutch positioning column 7 as the center of the circle, which are matched with the two first adjustment holes 52 respectively, and the central angle of the line connecting the two ends of the second adjustment hole 66 and the center of the circle of the blade mounting seat 61 is 90°. The blade mounting seat 61 is provided with a blade gear ring 61 matching the lower gear ring 55 of the adjustment gear plate, and the blade mounting seat 61 is provided with a blade groove 64 on the inner side of the blade gear ring 61, and the blade mounting seat 61 is provided with a driving blade 65; two locking screws passing through the blade mounting seat 61 and the adjustment gear plate 5 are respectively embedded in the two threaded positioning holes to position and lock the blade unit 6 and the adjustment gear plate 5, so that each driving blade 65 is distributed in a spiral shape. A graduation line and a graduation value are provided on the axial outer circumference of the blade mounting seat 61 , and a graduation indicating line indicating the helical angle value of the blade is provided on the axial outer circumference of the clutch seat 11 .

[0034] The rear air deflector 1 includes a cylindrical casing 14 connected to the hollow hub motor, a central column 13 is provided at the center line of the casing 14, and at least four spiral plates 12 are provided circumferentially on the central column 13, the edges of which are connected to the inner wall of the casing 14. The spiral direction of the spiral plates 12 is opposite to the spiral direction of the driving blades 65, the pitch between the spiral plates 12 is the same as the pitch between the driving blades 65, and the axial length of the spiral plates 12 along the central column 13 is the same as the axial length of the driving blades 65. The cross-section of one end of the central column 12 close to the guide box 8 is a quadratic parabola. The spiral box hole surrounded by two adjacent spiral plates 12, the central column 13 and the casing 14 is a straightening box 15, and the number of straightening boxes 15 is twice the number of blades plus one.

[0035] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A ship propulsion device, comprising an empty hub motor and a front fairing and a rear fairing arranged at both ends of the empty hub motor, the empty hub motor comprising a housing and a cylindrical fairing rotatably arranged in the housing, a motor stator is arranged on the inner wall of the housing, and a motor rotor is arranged on the outer wall of the fairing; Features: No less than three clutch seats are evenly distributed on the inner wall of the guide box around the central axis in the circumferential direction; the clutch seat is provided with a clutch gear ring whose center line is parallel to the radial direction of the guide box, and a mounting hole is provided on the clutch seat at the center line of the clutch gear ring, and a clutch positioning column is passed through the mounting hole, and an adjustment gear disc and a blade unit are detachably mounted on the clutch positioning column in sequence, and an upper gear ring meshing with the clutch gear ring is provided on the adjustment gear disc, and two first arc-shaped adjustment holes with the central axis of the clutch positioning column as the center are relatively provided on the adjustment gear disc, and a threaded positioning hole respectively matched with the two first adjustment holes is provided on the clutch seat; a lower gear ring coaxial with the upper gear ring is provided on the adjustment gear disc, and the tooth shape of the lower gear ring is consistent with that of the upper gear ring, and the tooth positions of the upper gear ring and the lower gear ring correspond one to one, or two adjacent teeth between the upper gear ring and the lower gear ring form a 3 / 4 tooth shape deflection angle, or a 1 / 2 tooth shape deflection angle, or a 1 / 4 tooth shape deflection angle in the radial direction; The blade unit includes a blade mounting seat, a connecting hole matched with the clutch positioning column is provided on the blade mounting seat, two arc-shaped second adjustment holes respectively matched with the two first adjustment holes with the central axis of the clutch positioning column as the center of the circle are provided on the blade mounting seat, a blade mounting seat matched with the lower gear ring of the adjustment toothed disk is provided on the blade mounting seat, and a driving blade is provided on the blade mounting seat; two locking screws passing through the blade mounting seat and the adjustment toothed disk are respectively embedded in the two threaded positioning holes to position and lock the blade unit and the adjustment toothed disk, so that each driving blade is distributed in a spiral shape; The rear air guide cover includes a cylindrical cover shell connected to the hollow hub motor, a center column is provided at the center line of the cover shell, and at least four spiral plates with edges connected to the inner wall of the cover shell are provided circumferentially on the center column. The spiral direction of the spiral plates is opposite to the spiral direction of the driving blades, the pitch between the spiral plates is the same as the pitch between the driving blades, and the axial length of the spiral plates along the center column is the same as the axial length of the driving blades.

2. A ship propulsion device according to claim 1, characterized in that: The cross section of one end of the central column close to the guide function is in a quadratic parabola shape.

3. A ship propulsion device according to claim 1, characterized in that: The spiral hole formed by two adjacent spiral plates, the central column and the cover is a rectifying box, and the number of rectifying boxes is twice the number of blades plus 1 or minus 1.

4. A ship propulsion device according to claim 1, characterized in that: The central angle of the line connecting the two ends of the first adjustment hole and the center of the adjustment gear plate is 15°.

5. A ship propulsion device according to claim 1, characterized in that: The cooperation between the mounting hole on the clutch seat and the clutch positioning column is a transitional cooperation; the cooperation between the connecting hole on the blade mounting seat and the clutch positioning column is a transitional cooperation.

6. A ship propulsion device according to claim 1, characterized in that: The central angle of the line connecting the two ends of the second adjustment hole and the center of the blade mounting seat is 90°.

7. A ship propulsion device according to any one of claims 1 to 6, characterized in that: A graduation line and a graduation value are arranged on the axial outer circumference of the blade mounting seat, and a graduation indicating line indicating the helical angle value of the blade is arranged on the axial outer circumference of the clutch seat.

8. A ship propulsion device according to any one of claims 1 to 6, characterized in that: The number of teeth on the upper gear ring and the lower gear ring is no less than 100.

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