CN207424686U - A Digital Hydraulic Control System for Azimuth Angle of Heliostat - Google Patents

Abstract

A digital hydraulic control system for heliostat azimuth control, the system comprising: the device comprises a hydraulic auxiliary element, a hydraulic power element, a digital hydraulic motor and a heliostat azimuth angle movement mechanism; the hydraulic auxiliary element ensures the normal work of the digital hydraulic motor; the hydraulic power element provides a high-pressure oil source for the digital hydraulic motor; the digital hydraulic motor is used for controlling the movement of the azimuth angle movement mechanism of the heliostat. The utility model discloses an in the system, use the azimuth motion of digital hydraulic motor control heliostat, the azimuth of heliostat realizes vectorization and digitization completely, reduces the debugging degree of difficulty, shortens the debugging cycle, reduces to the requirement of hydraulic oil cleanliness, long-term the use does not need adjustment system parameter to realize high positioning accuracy.

Description

A Digital Hydraulic Control System for Azimuth Angle of Heliostat

technical field

The utility model relates to the field of tower photothermal power generation, in particular to a digital hydraulic control system for the azimuth angle of a heliostat.

Background technique

The tower solar thermal power generation method is a kind of solar concentrating thermal power generation technology. Using this technology to generate electricity requires building a tall central absorption tower on the open ground, installing an absorber on the top of the tower, and installing a certain number of absorbers around the tower. The heliostat, through the heliostat, gathers sunlight into the cavity of the receiver on the top of the tower to generate high temperature, and then generates steam through the heat exchanger, and the steam drives the steam engine to generate electricity. The heliostat is a concentrating device composed of a supporting structure, a tracking transmission system and a reflector, which is used to track, reflect, and gather the sun's rays to enter the heat collector at the top of the receiving tower. It is an important part of the tower solar thermal power station . The azimuth angle control system of the heliostat is an important part to ensure the movement and positioning of the heliostat. Its performance determines the working efficiency of the heliostat, which in turn affects the power generation efficiency of the entire tower solar thermal power generation system.

The common control methods of heliostat azimuth angle control system are: mechanical control and hydraulic control. The mechanical control method has the disadvantage of inflexible layout, and each action requires an independent power source, which increases the complexity of the system and the installed power; moreover, it cannot realize the overload protection of the system, and the components are easy to wear, resulting in a short working life. Hydraulic control usually adopts hydraulic servo control, while in traditional hydraulic servo control, the hydraulic cylinder (motor) is controlled by a servo valve, and each channel is equipped with open-loop gain adjustment, feedback gain adjustment, zero adjustment, and input and feedback phase adjustment ;The small jet holes inside the servo valve will be worn out, and the servo valve has unstable factors such as temperature drift and zero point drift. Large and long cycle.

In summary, the prior art still needs to be improved.

Utility model content

In order to solve the problems of inflexible layout, complex system, high installed power and short working life of the existing heliostat tracking drive system, the need to adjust system parameters for long-term use, high requirements for hydraulic oil cleanliness, difficult debugging, and long cycle, etc., The utility model provides a digital hydraulic control system for the azimuth angle of a heliostat.

A digital hydraulic control system for controlling the azimuth angle of a heliostat, said system comprising: a hydraulic auxiliary component, a hydraulic power component, a digital hydraulic motor, and a heliostat azimuth movement mechanism; the hydraulic auxiliary component ensures that the digital hydraulic motor Normal operation; the hydraulic power element provides a high-pressure oil source for the digital hydraulic motor; the digital hydraulic motor is used to control the movement of the azimuth movement mechanism of the heliostat.

Further, the digital hydraulic motor controls the azimuth movement mechanism of the heliostat to rotate the heliostat around a designated axis, and controls the heliostat to track and reflect the sun's rays, and gather the sun's rays to the target position.

Further, the digital servo valve, the feedback mechanism, and the hydraulic motor are integrally integrated into the digital hydraulic motor.

Further, the controller sends an instruction to the motor on the digital servo valve to open the digital servo valve, the hydraulic power element provides high-pressure oil to the digital servo valve, and the digital servo valve outputs high-pressure oil to drive the digital servo valve. The hydraulic motor moves, and the movement of the hydraulic motor drives the corresponding feedback mechanism to control the valve port of the digital servo valve to make corresponding adjustment changes.

Further, the rotation speed of the motor and the internal mechanical feedback mechanism determine the rotation speed of the hydraulic motor, and the rotation angle of the motor and the internal mechanical feedback mechanism determine the rotation angle of the hydraulic motor, thereby realizing the digital The direction, rotation angle, and speed control of the hydraulic motor finally make the azimuth angle of the heliostat achieve high positioning accuracy.

Further, the digital hydraulic motor is a digitally controlled mechanical feedback servo hydraulic motor.

In the utility model, a digital hydraulic motor is used to control the azimuth movement mechanism of the heliostat, thereby controlling the heliostat to track, reflect, and gather sunlight to a target position. The azimuth of the heliostat is completely vectorized and digitized, which reduces the difficulty of debugging, shortens the debugging cycle, reduces the requirements for the cleanliness of hydraulic oil, does not need to adjust system parameters for long-term use, and achieves high positioning accuracy.

Description of drawings

Fig. 1 is the schematic diagram of the heliostat azimuth angle digital hydraulic control system described in the utility model;

Fig. 2 is a schematic diagram of the working principle of the mechanical feedback servo hydraulic motor in the digital control mode.

In the picture:

1-Hydraulic auxiliary components

2- Hydraulic Power Components

3-digital hydraulic motor

4-Azimuth motion mechanism

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in FIG. 1 , it shows a schematic diagram of the digital hydraulic control system for the azimuth angle of the heliostat of the present invention. The heliostat azimuth digital hydraulic control system includes a hydraulic auxiliary component 1 , a hydraulic power component 2 , a digital hydraulic motor 3 and an azimuth movement mechanism 4 . Among them, the hydraulic auxiliary component 1 ensures the normal operation of the digital hydraulic motor 3 of the hydraulic system, the hydraulic power component 2 provides high-pressure oil source for the digital hydraulic motor 3, and the digital hydraulic motor 3 directly or indirectly controls the azimuth movement mechanism 4 of the heliostat , to make the heliostat rotate around the specified axis, control the heliostat to track, reflect and gather the sun's rays to the target position.

The digital hydraulic motor 3 integrates a digital servo valve, a feedback mechanism, a hydraulic motor, etc. into a whole. As shown in Figure 2, when the digital control method is used, the controller sends instructions to the motor on the digital servo valve of the digital hydraulic motor 3 to open the digital servo valve of the digital hydraulic motor 3, and the hydraulic power element 2 supplies the digital hydraulic motor 3 High-pressure oil, the digital servo valve outputs high-pressure oil to drive the movement of the hydraulic motor, and the movement of the hydraulic motor drives the corresponding feedback mechanism to control the valve port of the digital servo valve to make corresponding adjustment changes, such as the opening degree or direction of the valve port. The rotation speed of the motor and the internal mechanical feedback mechanism determine the rotational speed of the hydraulic motor, and the rotation angle of the motor and the internal mechanical feedback mechanism determine the rotation angle of the hydraulic motor, so as to realize the control of the direction, rotation angle and rotation speed of the hydraulic motor, and finally make the fixed sun Mirror azimuth achieves high positioning accuracy.

As mentioned above, in the azimuth digital hydraulic control system of the heliostat described in this application, the digital hydraulic motor 3 is a mechanical feedback servo hydraulic motor in a digital control mode, and the digital hydraulic motor 3 is used to directly or indirectly control the heliostat Azimuth movement mechanism 4, the azimuth of the heliostat is completely vectorized and digitized, which reduces the difficulty of debugging, shortens the debugging cycle, reduces the requirement for hydraulic oil cleanliness, and does not need to adjust system parameters for long-term use, and achieves high positioning accuracy.

The above examples only express the implementation manner of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (6)

1. A digital hydraulic control system for heliostat azimuth control, characterized in that the system comprises: hydraulic auxiliary components, hydraulic power components, digital hydraulic motors and heliostat azimuth motion mechanisms; The hydraulic auxiliary component is connected with the digital motor to ensure the normal operation of the digital hydraulic motor; The hydraulic power element is connected to the digital hydraulic motor so as to provide a high-pressure oil source to the digital hydraulic motor; The digital hydraulic motor is connected with the azimuth movement mechanism of the heliostat, and is used to control the movement of the azimuth movement mechanism of the heliostat. 2. The system according to claim 1, wherein the digital hydraulic motor controls the azimuth movement mechanism of the heliostat to rotate the heliostat around a designated axis, and controls the heliostat to track and reflect the sun light, and focus the sun's rays to the target location. 3. The system according to claim 1, characterized in that the digital servo valve, the feedback mechanism, and the hydraulic motor are integrally integrated into the digital hydraulic motor. 4. The system according to claim 3, wherein the controller sends instructions to the motor on the digital servo valve to open the digital servo valve, and the hydraulic power element provides high-pressure oil to the digital servo valve , the digital servo valve outputs high-pressure oil to drive the hydraulic motor to move, and the movement of the hydraulic motor drives a corresponding feedback mechanism to control the valve port of the digital servo valve to make corresponding adjustment changes. 5. The system according to claim 4, wherein the rotation speed of the motor and the internal mechanical feedback mechanism determine the rotation speed of the hydraulic motor, and the rotation angle of the motor and the internal mechanical feedback mechanism determine the The rotation angle of the hydraulic motor, thereby realizing the control of the direction, rotation angle, and speed of the digital hydraulic motor, and finally enabling the azimuth angle of the heliostat to achieve high positioning accuracy. 6. The system according to any one of claims 1-5, wherein the digital hydraulic motor is a digitally controlled mechanical feedback servo hydraulic motor.