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Safety stop assembly

A technology of safe stop and components, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problem of increasing the total cost of wind turbines, and achieve the effect of reducing critical structural loading

Active Publication Date: 2020-01-17
SIEMENS GAMESA RENEWABLE ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These additional measures add significantly to the overall cost of the wind turbine

Method used

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Embodiment Construction

[0042] In the various figures, the same reference numerals designate the same objects. Objects in the drawings are not necessarily drawn to scale.

[0043] figure 1 A portion of an embodiment of the safety stop valve arrangement 1 of the present invention is shown in normal or "healthy" turbine operating conditions. The figure shows valves V1 , V2 of a safety stop for one of the blade pitch systems of a wind turbine and indicates its solenoid coil actuator signal C1 , C2 . as will be in Figure 7 and Figure 8 As explained in , the control signals C1, C2 of the solenoid coils of the valves V1, V2 can be generated. The figure also shows a hydraulic accumulator arrangement 15 comprising one or more accumulators for containing pressurized hydraulic fluid.

[0044] In this "normal" state of turbine operation, a signal is applied to the solenoid coil of the "normally open" relief valve V1 to actively hold it closed, as commanded by the compressed spring. The "normally closed"...

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Abstract

The invention describes a safety stop valve arrangement (1) of a hydraulic blade pitch system (2) of a wind turbine, comprising an accumulator arrangement (15) connected over a hydraulic line (14) toa piston of the hydraulic blade pitch system (2); a redundant set of safety valves (V1) arranged between the accumulator arrangement (15) and the piston; a small-orifice restriction nozzle (N1) arranged to determine a first rate of hydraulic fluid flow in response to a safety stop input (STP1); at least one speed-select valves (V2) arranged; and at least one large-orifice restriction nozzle (N2, N2A, N2B) arranged to determine a second rate of hydraulic fluid flow in response to a positive rotor acceleration input (STP2), wherein the second rate of fluid flow is faster than the first rate of fluid flow. The invention further describes a safety stop assembly (3) of a wind turbine with hydraulic blade pitch systems (2). The invention further describes a method of performing a safety stop sequence.

Description

technical field [0001] The present invention describes a safety stop valve arrangement for a hydraulic blade pitch system of a wind turbine; a safety stop assembly for a wind turbine with a hydraulic blade pitch system; a device for performing a safety stop sequence for a wind turbine A method; and a wind turbine having a hydraulic blade pitch system and such a safety stop for each hydraulic blade pitch system. Background technique [0002] The aerodynamic rotor of a wind turbine includes a rotatable hub and a plurality of rotor blades. The invention relates to an aerodynamic rotor for which the rotor blades are variable pitch, ie the rotor blades can be positioned relative to the incoming air flow with a pitch movement. The blades may be pitched such that the relative angles of attack of the blade surfaces enable the wind turbine to operate efficiently and optimize the transfer of kinetic energy from the wind into the turbine rotor. Similarly, the blades may be pitched su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02
CPCF03D7/0224F03D7/0244F03D7/0264F03D7/0276F05B2260/845F05B2260/901F05B2270/1074F05B2270/309F05B2270/327F05B2270/328F05B2270/506F05B2270/604Y02E10/72
Inventor S.H.霍金斯M.A.克里斯滕森
Owner SIEMENS GAMESA RENEWABLE ENERGY AS