CN216468397U - Hub body structure of propeller with adjustable pitch - Google Patents
Hub body structure of propeller with adjustable pitch Download PDFInfo
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- CN216468397U CN216468397U CN202122823478.2U CN202122823478U CN216468397U CN 216468397 U CN216468397 U CN 216468397U CN 202122823478 U CN202122823478 U CN 202122823478U CN 216468397 U CN216468397 U CN 216468397U
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- propeller
- propeller shaft
- oil cylinder
- hub
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Abstract
A hub body structure of a propeller with adjustable pitch comprises a hub body, a propeller shaft and a variable pitch oil cylinder assembly, wherein the front end opening of the hub body is connected with the variable pitch oil cylinder assembly, the propeller shaft penetrates through the rear end opening of the hub body and is connected with the variable pitch oil cylinder assembly in a matching mode in an inner cavity of the hub body, a boss mechanism is arranged inside a matching end of the hub body and the propeller shaft, an inner hole of the boss mechanism is conical, the diameter of the front end of the conical inner hole is smaller than that of the rear end, the propeller shaft penetrates into the conical inner hole from the rear to the front, the hub body and the conical inner hole are assembled in an oil pressure interference fit mode, the connected hub body is pushed into a mounting position of the propeller shaft, and interference requirements are met through control over axial pushing quantity, so that power transmission capacity is met; the propeller hub body structure adopts a more flexible and convenient mode to assemble the propeller shaft and the propeller hub body, reduces the hidden sealing trouble, can carry out local disassembly and assembly maintenance on the inner part of the propeller hub body during maintenance, and has small maintenance difficulty.
Description
Technical Field
The utility model belongs to the technical field of ship propellers, and particularly relates to a hub body structure of a propeller with an adjustable pitch.
Background
The hub body and the propeller shaft of the current ship adjustable-pitch propeller are generally connected by adopting a flange bolt, and the assembling process is to assemble the hub body, the blades, a crank disc, a piston rod, a propeller shell oil cylinder, a sliding block and the like into a hub body assembly and then connect the rigid flange of the propeller shaft and the hub body assembly together by a bolt for power transmission. In order to meet the requirements of strength and sealing, a propeller shaft of a ship propeller and a propeller hub body assembly must be connected and power is transmitted through specially-made bolts and pin shafts with high strength, high impact performance and strong corrosion resistance, and an O-shaped ring is required to seal the root part of each bolt. This type of assembly has the following disadvantages: 1. more sealing rings also mean that more hidden sealing trouble points exist, and the sealing reliability is low; 2. the propeller shaft end needs to be manufactured with a steel flange for connection, the forging manufacturing manufacturability is poor, the whole connecting shaft system is lengthened, and the bending moment borne by the shaft system is large; 3. the requirement on centering is high when the propeller shaft flange is connected with the propeller hub body assembly, the requirement on position precision of a processing screw hole and a positioning pin hole is high, the processing manufacturability is poor, and the disassembly is difficult; 4. when the adjustable-pitch propeller is maintained, the front end of the propeller hub body is only provided with the small hole through which the piston rod passes, the propeller hub body assembly is firstly detached from the propeller shaft, then the maintenance work inside the propeller hub body assembly is carried out, the whole propeller hub assembly and disassembly is required during maintenance, the assembly and disassembly have limitations, the maintenance difficulty is high, and the strength is high.
Disclosure of Invention
In view of the above problems and technical requirements, the present invention provides a hub body structure of a propeller with an adjustable pitch, which can assemble a propeller shaft and a hub body in a more flexible and convenient manner, and can locally disassemble, assemble and repair the inside of the hub body, thereby reducing the maintenance difficulty.
The technical scheme of the utility model is as follows: a hub body structure of a propeller with adjustable pitch comprises a hub body, a propeller shaft and a variable pitch oil cylinder assembly, wherein the front end opening of the hub body is connected with the variable pitch oil cylinder assembly, the propeller shaft penetrates through the rear end opening of the hub body and is connected with the variable pitch oil cylinder assembly in a matching mode in an inner cavity of the hub body, a boss mechanism is arranged inside a matching end of the hub body and the propeller shaft, an inner hole of the boss mechanism is conical, the diameter of the front end of the conical inner hole is smaller than that of the rear end, the propeller shaft penetrates into the conical inner hole from the rear to the front, the propeller shaft and the conical inner hole are assembled in an oil pressure interference fit mode, the connected hub body is pushed into the mounting position of the propeller shaft, and interference requirements are met through control of axial pushing amount, so that power transmission capacity is met.
Furthermore, the boss mechanism comprises a hub boss and a taper sleeve, an inner hole of the hub boss is cylindrical, the taper sleeve is in clearance fit with the inner hole of the hub boss, the outer surface of the taper sleeve is a cylindrical surface, and the inner surface of the taper sleeve is a conical surface. Boss mechanism includes clearance fit's propeller hub body boss and taper sleeve in this scheme, propeller hub body boss hole is conventional cylindrical, the tapering of boss mechanism hole is provided by the taper sleeve, embolia the taper sleeve in-process forward by the rear end at the propeller shaft, propeller shaft extrusion taper sleeve, the oil pressure makes propeller hub body boss, form interference fit between taper sleeve and the propeller shaft, at this in-process, the conical hole of boss mechanism must produce the deformation, its tapering can not satisfy the assembly demand after the dismouting many times, adopt the taper sleeve can in time replace, guarantee the magnitude of interference and meet the demands.
Furthermore, an annular oil groove is processed on the conical surface of the matching of the propeller shaft and the taper sleeve, so that the propeller hub body and the propeller shaft can be assembled and disassembled conveniently in an oil pressure interference mode, the centering performance is good through the axial taper sleeve in an oil pressure interference connection assembly mode, stress concentration is avoided, a sealing effect is achieved, a sealing sleeve is fixedly sleeved on the propeller shaft, and the rear end face of the propeller hub body and the sealing sleeve of the propeller shaft are sealed through a sealing ring.
Furthermore, the variable-pitch oil cylinder assembly comprises an oil cylinder body, an oil cylinder flange and a piston rod, wherein the oil cylinder flange is connected to the bottom of the oil cylinder body in a sealing mode, the piston rod extends outwards from the center of the oil cylinder flange, and the tail end of the piston rod is connected with the propeller shaft in a matched mode.
Furthermore, a sliding disc is further arranged on the piston rod and located between the oil cylinder flange and the paddle shaft, and the sliding disc can control the axial displacement of the piston rod.
Furthermore, the front end opening of the propeller hub body is open, and the oil cylinder flange is connected with the front end opening of the propeller hub body in a sealing mode. The front port of the propeller hub body is opened, the oil cylinder body is directly dismounted when the propeller hub body needs to be overhauled, internal parts of the propeller hub body can be maintained, the whole propeller hub body does not need to be dismounted, the internal mounting and dismounting are convenient and simple, and the use and maintenance cost is effectively reduced.
Furthermore, four blade mounting holes are formed in the outer peripheral surface of the hub body in an equiangular staggered manner.
Further, the hub body is made of copper alloy.
Compared with the prior art, the utility model has the beneficial effects that: the propeller shaft and the propeller hub body are in keyless interference connection and oil pressure interference connection, the centering performance is good through the axial taper sleeve, the assembly and disassembly are convenient through an oil pressure assembly and disassembly tool, the stress concentration is avoided, the bearing capacity is high, and meanwhile, the sealing function is achieved. Compared with the existing bolt type assembly, the length of a rigid connecting flange is not arranged between the propeller hub body and the propeller shaft, and the bending moment borne by the shaft system is smaller; a sealing ring is arranged between the propeller shaft sealing sleeve and the rear end face of the propeller hub body, and the propeller shaft sealing sleeve and the propeller hub body are locked by oil pressure interference fit, so that the sealing effect is achieved, the number of sealing points connected by original bolts is effectively reduced, and the sealing hidden danger is greatly reduced; the left end of the hub body is open, the inside of the hub body is convenient and simple to assemble and disassemble, the use and maintenance cost is effectively reduced, and the economic benefit of ship use is improved.
Drawings
FIG. 1 is a schematic view of a hub assembly of an adjustable pitch propeller according to the present invention;
FIG. 2 is a schematic view of the assembly of the propeller shaft and the cone sleeve of the present invention;
FIG. 3 is a perspective view of the hub body of the present invention;
FIG. 4 is a partial cross-sectional view of the hub body of the present invention;
labeled as: the variable-pitch propeller comprises a propeller hub body 1, a propeller blade mounting hole 11, a propeller shaft 2, a propeller shaft sealing sleeve 21, a sealing ring 22, an annular oil groove 23, a variable-pitch oil cylinder assembly 3, an oil cylinder body 31, an oil cylinder flange 32, a piston rod 33, a sliding disc 34, a boss mechanism 4, a propeller hub body boss 41 and a taper sleeve 42.
Detailed Description
The utility model is further described below with reference to the figures and examples.
As shown in fig. 1-4, the hub body structure of the variable pitch propeller of the present invention comprises a hub body 1, a propeller shaft 2 and a variable pitch cylinder assembly 3, wherein a front port of the hub body 1 is connected with the variable pitch cylinder assembly 3, and the propeller shaft 2 passes through a rear port of the hub body and is connected with the variable pitch cylinder assembly 3 in a matching manner in an inner cavity of the hub body 1.
A boss mechanism 4 is arranged inside the matching end of the propeller hub body 1 and the propeller shaft 2, the inner hole of the boss mechanism 4 is conical, and the diameter of the front end of the conical inner hole is smaller than that of the rear end; specifically, the boss mechanism 4 includes a hub body boss 41 and a taper sleeve 42, an inner hole of the hub body boss 41 is cylindrical, the taper sleeve 42 is in clearance fit with the inner hole of the hub body boss 41, an outer surface of the taper sleeve 42 is a cylindrical surface, and an inner surface of the taper sleeve 42 is a conical surface; the propeller shaft 2 penetrates into the taper sleeve 42 from back to front, the connected propeller hub body boss 41 and the taper sleeve 42 are pushed into a propeller shaft mounting position through oil pressure interference fit assembly, and the interference requirement is met through control of axial pushing-in amount, so that the power transmission capacity is met. In the process, the conical inner hole of the boss mechanism 4 is inevitably deformed, the taper of the boss mechanism cannot meet the assembly requirement after being disassembled and assembled for many times, and the taper sleeve 42 can be replaced in time to ensure that the magnitude of interference meets the requirement. The taper sleeve 42 can also reduce the manufacturing difficulty of the hub body 1, and the inner hole of the boss 41 of the hub body is manufactured according to a conventional cylinder shape and does not need to be provided with a taper.
The variable-pitch oil cylinder assembly 3 comprises an oil cylinder body 31, an oil cylinder flange 32 and a piston rod 33, the bottom of the oil cylinder body 31 is hermetically connected with the oil cylinder flange 32, the piston rod 33 extends outwards from the center of the oil cylinder flange 32, and the tail end of the piston rod 33 is connected with the propeller shaft 2 in a matched mode; the piston rod 33 is further provided with a sliding disc 34, the sliding disc 34 is located between the cylinder flange 32 and the paddle shaft 2, and the end faces of the cylinder flange 32 and the paddle shaft 2 form a block to the sliding disc 34 to control the axial displacement distance of the piston rod 33.
The hub body 1 is made of copper alloy, four blade mounting holes 11 are formed in the outer peripheral surface of the hub body 1 in an equiangular staggered mode, the front end opening of the hub body is open, and an oil cylinder flange 32 of an oil cylinder body 31 is connected with the front end opening of the hub body in a sealing mode. The front port of the propeller hub body is open, when the propeller hub body needs to be overhauled, only the oil cylinder body 31 and the oil cylinder flange 32 need to be disassembled, internal parts of the propeller hub body 1 can be maintained, the whole propeller hub body 1 does not need to be disassembled, the internal assembly and disassembly are convenient and simple, and the use and maintenance cost is effectively reduced.
An annular oil groove 23 is processed on the conical surface of the propeller shaft 2, so that the propeller hub body 1 and the propeller shaft 2 can be conveniently assembled and disassembled under oil pressure. The assembly form that oil pressure interference is connected, through the axial taper sleeve, the centering nature is good, does not have stress concentration, has sealed effect simultaneously, and 1 rear end face of the propeller hub body passes through sealing washer 22 with propeller shaft seal cover 21 and seals, only uses a sealing washer 22 to rely on interference fit just can reach good sealed effect, has effectively reduced former bolted connection's sealing point quantity, the sealed hidden danger that has significantly reduced.
The assembly process of the utility model: the front end of the propeller shaft 2 is connected with the piston rod 33, the taper sleeve 42 is sleeved into an inner hole of the boss 41 of the propeller hub body in advance, the taper sleeve 42 and the inner hole of the boss 41 of the propeller hub body are in clearance fit, oil pressure interference fit assembly is carried out, the connected boss 41 of the propeller hub body and the taper sleeve 42 are pushed into the installation position of the propeller shaft, and the interference requirement is met through control of axial pushing amount, so that the power transmission capacity is met. After the assembly is in place, the propeller shaft sealing sleeve 21 on the propeller shaft is tightly attached to the rear end face of the propeller hub body, and the joint of the propeller shaft sealing sleeve 21 and the propeller hub body is completely sealed by the sealing ring 22 on the propeller shaft sealing sleeve 21.
The above description is only for the preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A hub body structure of an adjustable-pitch propeller is characterized in that: the front end opening of the hub body is connected with the variable-pitch oil cylinder assembly, the propeller shaft penetrates through the rear end opening of the hub body and is connected with the variable-pitch oil cylinder assembly in a matching mode in the inner cavity of the hub body, a boss mechanism is arranged inside the matching end of the hub body and the propeller shaft, an inner hole of the boss mechanism is conical, the diameter of the front end of the conical inner hole is smaller than that of the rear end, the propeller shaft penetrates into the conical inner hole from back to front, the hub body and the hub body are assembled in an interference fit mode through oil pressure, the connected hub body is pushed to the mounting position of the propeller shaft, and the interference requirement is met through control of axial pushing-in amount, so that power transmission capacity is met.
2. The hub structure of an adjustable pitch propeller as claimed in claim 1, wherein: the boss mechanism comprises a hub boss and a taper sleeve, an inner hole of the hub boss is cylindrical, the taper sleeve is in clearance fit with the inner hole of the hub boss, the outer surface of the taper sleeve is a cylindrical surface, and the inner surface of the taper sleeve is a conical surface.
3. The hub structure of an adjustable pitch propeller as claimed in claim 2, wherein: an annular oil groove is processed on the conical surface of the matching of the propeller shaft and the taper sleeve, a sealing sleeve is fixedly sleeved on the propeller shaft, and the rear end face of the propeller hub body and the sealing sleeve of the propeller shaft are sealed through a sealing ring.
4. The hub structure of an adjustable pitch propeller as claimed in claim 1, wherein: the variable-pitch oil cylinder assembly comprises an oil cylinder body, an oil cylinder flange and a piston rod, wherein the oil cylinder flange is connected to the bottom of the oil cylinder body in a sealing mode, the piston rod extends outwards from the center of the oil cylinder flange, and the tail end of the piston rod is connected with the propeller shaft in a matched mode.
5. The hub structure of an adjustable pitch propeller as claimed in claim 4, wherein: the piston rod is further provided with a sliding disc, the sliding disc is located between the oil cylinder flange and the propeller shaft, and the sliding disc can control the axial displacement of the piston rod.
6. The hub structure of an adjustable pitch propeller as claimed in claim 4, wherein: the front end opening of the propeller hub body is open, and the oil cylinder flange is connected with the front end opening of the propeller hub body in a sealing mode.
7. The hub structure of an adjustable pitch propeller as claimed in claim 1, wherein: four blade mounting holes are formed in the outer circumferential surface of the propeller hub body in an equiangular staggered mode.
8. The hub structure of an adjustable pitch propeller as claimed in claim 1, wherein: the hub body is made of copper alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823478.2U CN216468397U (en) | 2021-11-17 | 2021-11-17 | Hub body structure of propeller with adjustable pitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823478.2U CN216468397U (en) | 2021-11-17 | 2021-11-17 | Hub body structure of propeller with adjustable pitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216468397U true CN216468397U (en) | 2022-05-10 |
Family
ID=81396889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122823478.2U Active CN216468397U (en) | 2021-11-17 | 2021-11-17 | Hub body structure of propeller with adjustable pitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216468397U (en) |
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2021
- 2021-11-17 CN CN202122823478.2U patent/CN216468397U/en active Active
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