IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0536771
(2003-12-10)
|
등록번호 |
US-7530224
(2009-07-01)
|
우선권정보 |
GB-0229042.7(2002-12-13) |
국제출원번호 |
PCT/GB03/005378
(2003-12-10)
|
§371/§102 date |
20051227
(20051227)
|
국제공개번호 |
WO04/055365
(2004-07-01)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Marine Current Turbines Limited
|
대리인 / 주소 |
Brinks Hofer Gilson & Lione
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
13 |
초록
▼
A hydraulic transmission system for use with at least one water current driven turbine rotor (6), low speed high pressure pump (24) is arranged to receive operational drive from the turbine rotor, and to deliver its output to a high speed hydraulic motor or turbine (35) in such manner as to produce
A hydraulic transmission system for use with at least one water current driven turbine rotor (6), low speed high pressure pump (24) is arranged to receive operational drive from the turbine rotor, and to deliver its output to a high speed hydraulic motor or turbine (35) in such manner as to produce an increase of the shaft or motor speed accompanied by a corresponding reduction of torque required to drive electrical generators (38) or other high speed machinery.
대표청구항
▼
The invention claimed is: 1. A hydraulic transmission system for deriving power from a flow of water, the system comprising: a water current turbine assembly submerged in a body of water containing a current, the water current turbine assembly including a flowing water actuatable rotor coupled to a
The invention claimed is: 1. A hydraulic transmission system for deriving power from a flow of water, the system comprising: a water current turbine assembly submerged in a body of water containing a current, the water current turbine assembly including a flowing water actuatable rotor coupled to a rotor shaft, the rotor operationally responsive to the water current to rotate the rotor shaft, a pump system for a hydraulic fluid supplied from the body of water to avoid pollution of the body of water when leakage of the hydraulic fluid occurs, the pump system configured to pressurize the hydraulic fluid to actuate a power producing assembly, the pump system comprising at least one low speed, high pressure pump directly coupled to the rotor shaft, and a pressure circuit comprising a fluid supply line and a fluid return line connected between the at least one pump and the power producing assembly, wherein the rotor shaft is configured to drive the at least one pump to pressurize the hydraulic fluid within the fluid supply line to be applied to the power producing assembly and thereafter the hydraulic fluid is returned by way of the fluid return line to the at least one pump for retransmission in the pump system, and wherein the power producing assembly is positioned above the water current turbine assembly and includes a hydraulic motor configured to rotate in response to the pressurized hydraulic fluid at a rotation rate higher than and independent of the rotor shaft, the hydraulic motor being coupled to a drive shaft of a power generator, and an intake adapted to receive make up hydraulic fluid from the body of water, and a header tank configured to store the make up hydraulic fluid, the header tank connected to the intake through a make up fluid supply line and connected to the at least one pump through a make up fluid return line, wherein the header tank is disposed such that a water static level thereof is immediately below the power producing assembly, and when the level of the hydraulic fluid in the fluid return line falls below the water static level, make up hydraulic fluid stored in the header tank flows therefrom through the make up fluid return line to the at least one pump. 2. The system of claim 1, wherein the pump system comprises a plurality of positive displacement pumps. 3. The system of claim 2, wherein the plurality of pumps are operationally indirectly coupled to the common rotor shaft rotated by the rotor driven by the water current. 4. The system of claim 3, wherein the pump system comprises a cam drive coupled to the rotor shaft, each pump being symmetrically disposed around the cam drive of the rotor shaft. 5. The system of claim 1, wherein the pump system includes a plurality of low speed, high pressure pumps directly operated by the rotation of the rotor shaft, each pump having a fluid inlet including a non-return valve to control the entrance of the hydraulic fluid from the fluid return line, and a fluid outlet including a non-return valve to control the exit of the hydraulic to the fluid supply line. 6. The system of claim 1, wherein the power producing assembly comprises a Pelton wheel. 7. The system of claim 1, wherein the pump system further comprises a pressure balancing tank coupled to the fluid supply line to absorb vibrational energy of the rotor shaft. 8. The system of claim 1, wherein the pump system includes a plurality of low speed, high pressure pumps circumferentially arranged around a longitudinal axis of the rotor shaft, each pump is operated by the rotation of the rotor shaft, wherein actuation of each pump pressurizes the hydraulic fluid of each pump, the pressurized hydraulic fluid being supplied to a pressure plenum coupling each pump to the fluid supply line. 9. The system of claim 1, wherein the pump system includes a plurality of low speed, high pressure pumps circumferentially arranged around a longitudinal axis of the rotor shaft, each pump is operated by the rotation of the rotor shaft, and a filter coupled to the intake to filter the make up hydraulic fluid received through the intake before entering the header tank, where the filtered make up hydraulic fluid is returned to the plurality of pumps, wherein the make up fluid return line and the fluid return line are coupled, combining and returning the return hydraulic fluid and the make up hydraulic fluid to a return plenum coupling each pump to the fluid return line. 10. The system of claim 1, further comprising a filter coupled to the intake to filter the make up hydraulic fluid received through the intake before entering the header tank. 11. The system of claim 1, wherein the pressurized hydraulic fluid to be applied to the power producing assembly is a smooth continuous jet flow supplied through at least one nozzle, and the hydraulic motor is configured to rotate in response to said jet flow at a rotation rate higher than and independent of the rotor shaft. 12. The system of claim 1, wherein a level sensor is configured to monitor the water static level of the header tank and control the amount of the make up hydraulic fluid entering into the header tank, where when the water static level has fallen below a predetermined level, a small pump coupled to the make up fluid supply line is configured to pump the make up hydraulic fluid from the body of water. 13. The system of claim 1, wherein the hydraulic motor is coupled to a the drive shaft of the power generator though pulleys and a belt transmission.
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