Operating apparatus for guide vanes of hydraulic machine专利检索-电液伺服作动器致动器机电学专利检索查询-专利查询网

Operating apparatus for guide vanes of hydraulic machine

阅读：108发布：2024-01-01

专利汇可以提供Operating apparatus for guide vanes of hydraulic machine专利检索，专利查询，专利分析的服务。并且An operating apparatus for the guide vanes of fluid, preferably hydraulic, kinetic energy machines, particularly turbines or the like, employs a servomotor (including a servo valve) to operate each of a plurality of guide vanes controlling the supply of motive fluid to the wheel or runner of the machine. Each of the servomotors is selectively driven by a signal from a frequency detector, which generates a signal proportional to the rotary speed of the runner, or by a signal from a signal generating means that provides a signal independently of the speed of rotation. The movement of each guide vane is fed back as an electric signal by a potentiometer having its resistance varied according to the opening degree of the guide vane associated therewith, which feedback signal will detect the presence of foreign matter interrupting the normal movement of a guide vane, which will be present as a detecting voltage of servomotor operating or driving the particular vane.，下面是Operating apparatus for guide vanes of hydraulic machine专利的具体信息内容。

权利要求

1. An operating apparatus for the guide vanes of a rotary fluid machine having a rotor, comprising: valve means having a plurality of fluid guide vanes mounted for movement between open and closed positions circumferentially of the rotor for controlling the flow of working fluid between the rotor and the exterior of the rotary machine; a plurality of servomotors, each of which is drivingly connected with a corresponding plurality of at least some of said guide vanes to respectively control the positions of the connected guide vanes between their open and closed positions; signal generator means for producing a signal correlated to the rotational speed of the rotor for controlling operation of each of said servomotors to correspondingly control the positions of said connected guide vanes; a plurality of separate position feedback means respectively associated with each of said servomotors for producing a position signal proportional to the movement of the guide vane associated with the particular servomotor; and further means for adjusting each of the position feedback means to individually change the position signal independently of vane position for calibration purposes to obtain uniformity of control for all of the vanes.

2. The apparatus of claim 1, wherein said feedback means are each potentiometers having a movable tap drivingly connected to a corresponding guide vane and said further means are variable resistors provided in circuit with said potentiometers.

3. The apparatus of claim 1, further including generating means for producing a desired control signal independent of rotor speed; switch means for selectively connecting the output of either said signal means or said generating means to said servomotors.

4. The apparatus Of claim 3, wherein there are a plurality of said switch means corresponding in number and respectively associated with said servomotors; and at least some of said switch means being operable independently of others of said switch means.

5. The apparatus of claim 1, wherein at least two of said guide vanes are drivingly connected to a servomotor, for each of said servomotors.

6. The apparatus of claim 5, including a plurality of pivotally mounted first levers each having one end respectively drivingly connected to each of said servomotors and its opposite end respectively drivingly connected to one of said at least two guide vanes; a plurality of pivotally mounted second levers each having one end respectively drivingly connected to the other of said at least two guide vanes; and a plurality of connecting links respectively drivingly connected between said first levers and the other end of said second levers.

7. The apparatus of claim 1, including means for comparing the output of said feedback means and said signal means to produce an output proportional to the deviation of the actual guide vane positions with respect to their desired positions; and caught foreign matter indicator means responsive to said comparing means position deviation output.

8. The apparatus of claim 7, including voltage detector means to detect voltage differences between said signal means and said feedback means beyond a predetermined range; and time delay means in circuit with said voltage detector means for rendering operative said indicator means only after a predetermined period from a change in the control from said signal means.

9. The apparatus of claim 7, including delay means for preventing said indicator means from responding to said comparing means position deviation output for a predetermined period after said signal means operates to charge the position of said connected guide vanes.

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Operating apparatus for guide vanes of hydraulic machine

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