Twin engine, coaxial, dual-propeller propulsion system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-005/10
B64C-011/48
A47C-007/74
출원번호
US-0980482
(1997-11-29)
발명자
/ 주소
Smith Ronald A.
대리인 / 주소
Lyon
인용정보
피인용 횟수 :
6인용 특허 :
15
초록▼
A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train, which in turn rotates a forward multi-bladed propeller assembly. The second engine exclusively drives a s
A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train, which in turn rotates a forward multi-bladed propeller assembly. The second engine exclusively drives a second drive train, which in turn rotates an aft multi-bladed propeller assembly. Thus, the propellers of this propulsion system, even though coaxial, are driven by separate engines. The propulsion system also enjoys the increased propulsive efficiency of a coaxial dual-propeller design as the first drive train rotates the forward propeller assembly in a first rotational direction and the second drive train rotates the aft propeller assembly in the opposite direction. Further, the propulsion system employs pitch change control mechanisms which independently control the respective pitch of the blades of the two propeller assemblies. Specifically, a first pitch change controller exclusively controls the pitch of the blades of the forward propeller assembly and a second pitch change controller exclusively controls the pitch of the blades of the aft propeller assembly.
대표청구항▼
[ Wherefore, what is claimed is:] [1.] A twin engine, coaxial, dual-propeller propulsion system, comprising:first and second engines;a forward multi-bladed propeller assembly and an aft multi-bladed propeller assembly coaxial with the forward propeller assembly;a transmission comprising,a first driv
[ Wherefore, what is claimed is:] [1.] A twin engine, coaxial, dual-propeller propulsion system, comprising:first and second engines;a forward multi-bladed propeller assembly and an aft multi-bladed propeller assembly coaxial with the forward propeller assembly;a transmission comprising,a first drive train comprising,a drive shaft connected at one end to an output of the first engine and at its other end to a hub of a pinion gear,an idler gear rotatable meshed with the pinion gear,an output gear rotatable meshed with the idler gear, anda propeller shaft connected at one end to the first propeller assembly and attached at the other end to a hub of the output gear, whereinthe output of the first engine is capable of providing rotary torque when the first engine is running, thereby driving the pinion gear, which in turn drives the idler gear, which then drives the output gear and causes the propeller shaft to rotate, anda second drive train comprising,a drive shaft connected at one end to an output of the second engine and at its other end to a hub of a pinion gear,an output gear rotatable meshed with the pinion gear, anda housing attached coaxially at a first end to a hub of the output gear and at a second end to the second propeller assembly, said housing further having a cylindrical, longitudinal channel through which the propeller shaft associated with the first drive train extends without interference, whereinthe output of the second engine is capable of providing rotary torque when the second engine is running, thereby driving the pinion gear, which in turn drives the output gear and causes the housing to rotate, anda non-rotating tubular support wherein the propeller shaft is supported by and rotates in the first rotational direction inside of the tubular support and the housing is supported by and rotates in the second rotation direction around the outside of the tubular support; andat least one pitch change controller for controlling the pitch of the blades of the forward and aft propeller assemblies; whereinthe first engine exclusively drives the first drive train, which in turn exclusively rotates the forward propeller assembly and the second engine exclusively drives the second drive train, which in turn exclusively rotates the aft propeller assembly.
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이 특허에 인용된 특허 (15)
Johnson Kenneth O. (Cincinnati OH), Blade gearing and pitch changing mechanisms for coaxial counterrotating propellers.
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