CN210942208U - Shaftless propeller - Google Patents
Shaftless propeller Download PDFInfo
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- CN210942208U CN210942208U CN201921641317.8U CN201921641317U CN210942208U CN 210942208 U CN210942208 U CN 210942208U CN 201921641317 U CN201921641317 U CN 201921641317U CN 210942208 U CN210942208 U CN 210942208U
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- propeller
- hub
- bearing
- thrust unit
- shaftless
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- 239000000446 fuel Substances 0.000 abstract description 8
- 230000033001 locomotion Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
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- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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Abstract
The utility model discloses a novel shaftless propeller, which comprises at least three thrust units, a hub with an eccentric circle structure, a propeller, a rotary oil distribution valve and a compression spring; the thrust units are uniformly distributed on the shell, push the eccentric circles to do plane motion, and then drive the propeller to do rotary motion; the utility model discloses a hydraulic oil is as the power supply, joins in marriage the fuel tap through the rotation and to each thrust unit fuel feeding, and through the fuel feeding frequency that changes the rotatory fuel tap that joins in marriage, can realize the control to the propeller rotation rate. Compared with a propeller with a shaft, the propeller with a shaft has the advantages that a complex transmission mechanism and a complex speed reducing mechanism are omitted, the size is reduced, stepless speed regulation can be realized, the speed regulating range is wide, the operating performance is good, the generated torque is large, and the heat dissipation effect is good.
Description
Technical Field
The utility model belongs to the technical field of the propeller, in particular to shaftless propeller.
Background
At present, most propellers adopt an arrangement form that a motor output shaft drives propeller blades to rotate, namely, shaft propellers are provided. The principle of the propeller with the shaft is simple, a power cabin is usually arranged on a ship, an internal combustion engine is arranged in the power cabin, the power of the internal combustion engine is connected with the propeller through a main shaft, and finally the main shaft drives the propeller to rotate to generate thrust. There are several significant disadvantages to the shafted propulsion system: (1) the shafting used to transmit power to the propeller may impede the flow of fluid through the propeller, causing matter such as algae or the like to become entangled in the propeller; (2) along with the increase of the power of the main engine, the volume of the propulsion shafting becomes very large, the structure becomes extremely complex, and the requirement of heat dissipation is gradually increased; (3) the length of the propulsion shaft system is increased and the sealing system is arranged, so that the loss of the propulsion system is increased in the energy transfer process, the transfer efficiency is reduced, and the use cost is increased.
Furthermore, with the development of large-scale ships, the conventional ship propulsion system has gradually developed its disadvantages, and cannot better meet the operational requirements, and a shaftless propeller has been proposed.
The shaftless propeller is proposed by the American navy in 2005 at the earliest time and is mainly used for submarines. In China, maweiming academicians also do a lot of research work on shaftless propellers and have engineering practice. The basic structure of the ship is generally composed of a stator and a rotor (such as a patent CN 107719613A), wherein the stator is annular and is fixed on a ship body, and a winding wire group is arranged on the stator; the rotor is also of an annular structure and is generally a permanent magnet, the rotor is arranged on the stator through a bearing, the stator and the rotor are coaxial, and a plurality of blades are arranged on the inner surface of the rotor; when the propeller works, alternating current is conducted to the stator to generate an alternating electromagnetic field, and the alternating electromagnetic field is matched with the permanent magnet rotor to enable the rotor to rotate so as to drive the propeller to rotate. Compared with the axial propeller, the shaftless propeller with the structure has smaller volume and greatly improved transmission efficiency. However, the power dissipation device is only suitable for occasions with relatively low power, and once the power demand is high, the power dissipation device still has the defects of large volume, difficulty in heat dissipation, high energy loss, high cost, difficulty in maintenance and the like.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a shaftless propeller, which combines the hydraulic driving technology, the input end adopts a rotary oil distribution valve to inject pressure oil into each thrust unit in sequence, and pushes the outer ring of an eccentric bearing to rock on the plane; the output end is an eccentric bearing inner ring; the plane of the outer ring of the eccentric bearing shakes and is converted into the rotation of the inner ring, and then the hub and the propeller are driven to rotate and output; the output rotating speed of the shaftless propeller can be controlled by changing the oil supply frequency of the rotary oil distribution valve to each thrust unit.
In order to realize the functions, the utility model provides a shaftless propeller, which comprises a motor, a rotary oil distribution valve and a rotary propelling device; the rotary propelling device comprises a hub, a shell, a compression spring, an end cover, a first bearing, a second bearing, a retainer ring, a thrust unit, a sealing ring and an axial oil seal; the hub is a hollow shaft with an eccentric circle section and comprises the eccentric circle section, the concentric circle section and a propeller; the first bearing is mounted on a concentric circle segment of the hub; the inner ring of the second bearing is in interference fit with the eccentric circular section; the tail end of the thrust unit is always attached to the outer ring of the second bearing through the compression spring; the thrust units are distributed on the outer circumference of the shell in uniform distribution; the shell is concentric with the first bearing; the propeller is fixed in the hollow shaft of the hub; the right end cover is fixed on the shell through a screw; the axial oil seals are arranged on two sides of the hub; the retainer ring compresses the inner ring of the second bearing.
As an implementation mode, the hub is a hollow shaft, the middle part of the outer diameter of the hollow shaft is an eccentric circle section, two sides of the outer diameter of the hollow shaft are concentric circle sections, the concentric circle sections are concentric with the shell, and the eccentric circle sections are fastened with the inner ring of the second bearing.
As an embodiment, the motor drives the rotary oil distribution valve to sequentially inject high-pressure oil into the thrust unit according to a certain frequency; the output rotating speed of the shaftless propeller can be adjusted by adjusting the rotating speed of the motor.
As an embodiment, the thrust unit is a plunger cylinder.
As an implementation mode, the thrust unit is an oil-filled leather bag with elasticity, and the oil-filled leather bag expands to push the eccentric bearing.
As an implementation mode, the thrust units are distributed on the outer circumference of the shell in a plurality of numbers.
As an embodiment, the propeller is fixed in the hollow shaft of the hub, rotating together with the hub.
The utility model adopts the above technical scheme, possess following beneficial effect at least:
based on this kind of shaftless driven propeller, integrated as an organic whole with drive part and propeller, required supporting drive mechanism and reduction gears when having avoided using the motor for the volume of propeller reduces greatly, has improved the utilization ratio in space.
Based on such shaftless rim driven propellers, such as seaweed or similar, no matter gets entangled on the propeller.
3, this propeller is based on hydraulic drive, and the accessible is rotatory joins in marriage the fuel tap and is realized stepless speed governing, and the speed governing scope is big, and the maneuverability is good, and because the characteristics that hydraulic power density is big, the moment of torsion that the driver produced is bigger.
4, compare with the structure of stator, rotor, this driver adopts hydraulic drive, and not only the output power is bigger, and the heat that produces can be still less, uses hydraulic pressure simultaneously also to guarantee the leakproofness of device, has further simplified drive arrangement's complexity.
Drawings
Fig. 1 is a schematic view of the overall structure of a shaftless propeller provided by the present invention;
fig. 2 is a sectional view of the internal structure of the rotary propulsion device of the shaftless propeller according to the present invention;
fig. 3 is a schematic view of a propulsion principle implemented by the rotary propulsion device of the shaftless propeller provided by the present invention;
fig. 3a is a schematic diagram illustrating the motion of the eccentric section of the hub when the thrust unit t4 drives the second bearing;
FIG. 3b is a schematic diagram illustrating the movement of the eccentric section of the hub when the thrust unit t5 drives the second bearing;
fig. 3c is a schematic diagram illustrating the movement of the eccentric section of the hub when the thrust unit t1 drives the second bearing.
Detailed Description
The above and further features and advantages of the present invention will become apparent from the following more particular description, when taken in conjunction with the accompanying drawings, wherein it is to be understood that the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention.
As shown in fig. 1, the overall structure of the present invention is schematically illustrated, and the present invention includes a rotary propulsion device 11, a motor 12 and a rotary oil distribution valve 13.
As shown in fig. 2, for the utility model provides a shaftless propeller's inner structure cross-sectional view, including wheel hub 1, wheel hub eccentric circle section 111, wheel hub concentric circle section 112, screw 113, casing 2, retaining ring 3, thrust unit 4, compression spring 5, end cover 6, axial oil blanket 7, sealing washer 8, first bearing 9 and second bearing 10.
The hub 1 is a hollow shaft with an eccentric circle section and comprises a hub eccentric circle section 111, a hub concentric circle section 112 and a propeller 113, wherein the concentric circle section 112 is concentric with the shell 2 and the propeller 113; the inner ring of the second bearing 10 is in interference fit with the eccentric circular section 111; the thrust unit 4 ensures that the tail end of the thrust unit is always attached to the outer ring of the second bearing 10 through the compression spring 5; the number of the thrust units 4 is multiple, and the thrust units are uniformly distributed on the outer circumference of the shell 2; the shell 2 is concentric with the first bearing 9, the hub concentric circle section 112 and the propeller 113; the propeller 113 is fixed in the hollow shaft of the hub 1 and rotates together with the hub 1; the end cover 6 is fixed on the shell 2 through screws; the first bearing 9 is mounted on a concentric shaft section 112 of the hub 1; the axial oil seals 7 are arranged on two sides of the hub 1; the securing ring 3 is arranged on an eccentric circle section of the hub 1 and presses against the inner ring of the second bearing 10.
As shown in fig. 3, which is a schematic front layout view of the hub 1, the eccentric circle 111 is disposed in the middle of the hub 1; when the rotary oil distribution valve 13 sequentially supplies oil to the thrust unit 4, the tail end of the thrust unit 4 sequentially pushes out an eccentric distance to push the eccentric circular section 111 to perform plane shaking. Where t1, t2, t3, t4, and t5 respectively denote the respective thrust units.
When the shaftless propeller of the utility model works, the motor 12 rotates to drive the rotary oil distribution valve 13 to rotate, the rotary oil distribution valve 13 sequentially supplies high-pressure oil to each thrust unit 4 when rotating, and when the rotary oil distribution valve 13 supplies high-pressure oil to a certain thrust unit 4, the oil ways of the other thrust units 4 are connected with the oil tank; therefore, when the oil distribution valve 13 leads high-pressure oil into a certain thrust unit 4, the thrust unit 4 extends an eccentricity distance to push the outer ring of the second bearing 10 to translate for a certain distance, and then drives the inner ring of the second bearing 10 to rotate for an angle around an eccentric circle, and further drives the hub 1 to rotate for an equal angle; when the oil distribution valve 13 injects high-pressure oil into the thrust unit 4 in sequence, the thrust unit 4 sequentially ejects an eccentricity distance and sequentially pushes the outer ring of the second bearing 10, so that the outer ring of the second bearing 10 is subjected to plane shaking around an eccentric circle, and then the inner ring of the second bearing 10 is driven to rotate around the eccentric circle, so that the hub 1 is driven to rotate, and the propeller 113 is also subjected to rotary motion together.
Also, in this embodiment, the rotational speed of the shaftless propeller may be adjusted depending on the rotational speed of the rotary distribution valve 13: the change of the rotating speed of the rotary oil distribution valve 13 changes the frequency of oil injection of the thrust unit 4, that is, the frequency of the thrust unit 4 pushing the outer ring of the second bearing outer ring 10 changes, so that the speed of the second bearing 10 making plane shake changes, that is, the output rotating speed of the hub 1 changes, that is, the output rotating speed of the propeller changes.
The embodiment of the utility model provides an in order to increase the output moment of torsion of screw 113, rotatory distribution valve 15 can make two or three thrust unit 4 fuel feeding simultaneously, and under the unchangeable prerequisite of eccentricity, the thrust of production is bigger, and the moment of torsion of output will be bigger too.
The number of the thrust units 4 is determined according to the required rotation resolution, and the larger the number of the thrust units, the rotation angle of the hub is smaller each time the thrust units are ejected out; when the two thrust units work together, the acting force direction of the thrust is the resultant force direction of the two thrust units working simultaneously; the number of thrust units is generally at least 3.
The shaftless propeller comprises at least three thrust units 4, a hub 1 with an eccentric circle structure, a propeller 113, a rotary oil distribution valve 13 and a compression spring 5; the thrust units 4 are uniformly distributed on the shell 2, push the eccentric circular section 111 of the hub to do plane motion, and then drive the propeller 113 to do rotary motion; the utility model discloses a hydraulic oil is as the power supply, and through rotatory distribution valve 13 to the 4 fuel feeding of each thrust unit, through the fuel feeding frequency who changes rotatory distribution valve 13, can realize the control to the 113 rotation rates of propeller. Compared with a propeller with a shaft, the propeller with a shaft has the advantages that a complex transmission mechanism and a complex speed reducing mechanism are omitted, the size is reduced, stepless speed regulation can be realized, the speed regulating range is wide, the operating performance is good, the generated torque is large, and the heat dissipation effect is good.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and do not limit the scope of the present invention. It should be understood that any modification, equivalent replacement, or improvement made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A shaftless propeller is characterized by comprising a motor, a rotary oil distribution valve and a rotary propelling device; the rotary propelling device comprises a hub, a shell, a compression spring, an end cover, a first bearing, a second bearing, a retainer ring, a thrust unit, a sealing ring and an axial oil seal; the hub comprises an eccentric circle section, a concentric circle section and a propeller, and the first bearing is mounted on the concentric circle section of the hub; the tail end of the thrust unit is always attached to the outer ring of the second bearing through the compression spring; the shell is concentric with the first bearing; the propeller is fixed in the hollow shaft of the hub; the end cover is fixed on the shell through screws; the axial oil seals are arranged on two sides of the hub; the retainer ring compresses the inner ring of the second bearing.
2. The shaftless propeller of claim 1, wherein the hub is a hollow shaft, the middle part of the outer diameter of the hollow shaft is an eccentric circle section, the two sides of the hollow shaft are concentric circle sections, the concentric circle sections are concentric with the shell, and the eccentric circle sections are fastened with the inner ring of the second bearing.
3. The shaftless propeller of claim 1, wherein said motor is connected to said rotary oil distribution valve, high-pressure oil is supplied to said thrust unit, and the output rotation speed of said shaftless propeller is adjustable by adjusting the rotation speed of said motor.
4. The shaftless propeller of claim 1, wherein the thrust unit is provided in a plurality of numbers, and is uniformly distributed on the outer circumference of the housing.
5. The shaftless propeller of claim 1, wherein the thrust unit is a plunger cylinder or an oil-filled bladder with elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641317.8U CN210942208U (en) | 2019-09-29 | 2019-09-29 | Shaftless propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641317.8U CN210942208U (en) | 2019-09-29 | 2019-09-29 | Shaftless propeller |
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| Publication Number | Publication Date |
|---|---|
| CN210942208U true CN210942208U (en) | 2020-07-07 |
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| CN201921641317.8U Active CN210942208U (en) | 2019-09-29 | 2019-09-29 | Shaftless propeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525622A (en) * | 2019-09-29 | 2019-12-03 | 杭州诺祥科技有限公司 | Shaftless propeller |
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2019
- 2019-09-29 CN CN201921641317.8U patent/CN210942208U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525622A (en) * | 2019-09-29 | 2019-12-03 | 杭州诺祥科技有限公司 | Shaftless propeller |
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