CN201344094Y - Mechanism for controlling steering, blade pitching and braking of wind power equipment - Google Patents

Abstract

The utility model discloses a mechanism for controlling steering, pitch change and braking of wind power generation equipment, which comprises a hydraulic power unit, main and auxiliary oil circuits connected with the hydraulic power unit, and a yaw unit connected to the main and auxiliary oil circuits , Parking brake unit, pitch unit, safety brake unit. This kind of mechanism for controlling the steering, pitch change and braking of wind power generation equipment can realize the control of wind turbine steering, shutdown, pitch change and safety braking, thereby helping to improve the power generation efficiency and equipment operation safety of wind power generation equipment. Contribute to the convenience of equipment maintenance.

Description

The mechanism that controls the steering, pitch and braking of wind power generation equipment

technical field

The utility model relates to the technical field of wind power generation, in particular to a mechanism for controlling steering, pitch change and braking of wind power generation equipment.

Background technique

Wind power generation converts energy through the wind power generation mechanism, intercepts the kinetic energy of the flowing air, and converts a part of the kinetic energy of the air within the area swept by the wind turbine blades into useful mechanical energy, and then converts the mechanical energy into electrical energy. In order to enable wind power generation to be efficient, safe and easy to maintain, wind power generation equipment must meet the following requirements:

1. In the actual wind power generation process, the direction of the wind is constantly changing, and the wind force is also unstable. Therefore, it is necessary to make the wind turbine of the wind power generation equipment always face the maximum direction of the wind to generate electricity safely and efficiently.

2. When the energy of the battery of the wind turbine is saturated or the wind turbine needs maintenance, the blades can be stopped from rotating.

3. It is possible to change the speed of the wind wheel and control the output power by changing the angle of the blades of the wind turbine.

4. When the wind turbine is subjected to a wind force beyond its ability to bear or needs to stop the wind turbine, it can brake the blades urgently to ensure the safety of the wind power generation equipment.

Utility model content

In order to make the wind power generation equipment meet the requirements of the above four aspects, the purpose of this utility model is to provide a mechanism for controlling the steering, pitch and braking of the wind power generation device.

The mechanism for controlling steering, pitch change and braking of wind power generation equipment of the utility model includes a hydraulic power unit, main and auxiliary oil passages connected with the hydraulic power unit, yaw unit and stop mechanism connected to the main and auxiliary oil passages drive unit, pitch unit, safety brake unit;

The hydraulic power unit supplies oil to the main and auxiliary oil circuits, and provides the required oil pressure for other units to work;

The yaw unit controls the blades of the wind turbine to face the wind direction according to the direction signal;

The stop braking unit is used to brake the main shaft of the wind turbine when the wind turbine needs to stop running;

The pitch unit changes the angle of the blades for control;

The safety braking unit performs safety braking for the blades after pitch adjustment.

By adopting the above-mentioned technical scheme, the mechanism for controlling the steering, pitch change and braking of the wind power generation equipment of the present utility model can realize the control of the wind turbine steering, shutdown, pitch change and safety braking, thereby contributing to the power generation efficiency of the wind power generation equipment, The improvement of equipment operation safety also contributes to the convenience of equipment maintenance.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail:

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is the hydraulic oil circuit diagram of the utility model.

Detailed ways

As shown in Figure 1, the mechanism for controlling steering, pitch and braking of wind power generation equipment of the present invention includes a hydraulic power unit 100, main and auxiliary oil circuits connected to the hydraulic power unit 100, and main and auxiliary oil circuits connected to the main and auxiliary oil circuits. Yaw unit 200 , parking braking unit 300 , pitch unit 400 , safety braking unit 500 and mechanism pressure maintaining unit 600 on the road.

As shown in Figure 2, the hydraulic power unit 100 includes a double internal meshing pump 101, relief valve F1, relief valve F2, sequence valve F3, two-position two-way reversing solenoid valve F4, two-position four-way reversing solenoid valve F6, filter G1, one-way valve D1, one-way valve D2 and one-way valve D3. The two-position four-way reversing solenoid valve F6 has four ports.

Among them, the duplex internal meshing pump 101 produces two oil circuits, one is the main oil circuit P, and the other is the auxiliary oil circuit P1. The sequence valve F3 is connected to the double internal meshing pump 101 on the auxiliary oil passage P1. A branch oil circuit is connected between the sequence valve F3 and the double internal meshing pump 101, the relief valve F1 and the two-position two-way reversing solenoid valve F4 are connected in parallel on the branch oil circuit, and lead to the oil tank 001 through the filter G2 . The sequence valve F3 is a pressure valve, and the sequence valve F3 is usually in a closed state. When the oil pressure at the oil inlet end of the sequence valve F3 exceeds the set value (12 bar in this embodiment), the sequence valve F3 will automatically open. The overflow valve F1 is a one-way pressure valve, which acts as a pressure limiter for the auxiliary oil circuit P1. When the oil pressure in the auxiliary oil circuit P1 is in the normal range, the relief valve F1 is closed, once the oil pressure in the auxiliary oil circuit P1 exceeds the set value (100bar in this embodiment), the relief valve F1 will Automatically open, excess oil is filtered by filter G2 and then discharged into oil tank 001. The two-position two-way reversing solenoid valve F4 plays a role similar to a switch. When the valve is in a normal state, the hydraulic oil in the auxiliary oil circuit P1 is directly returned to the oil tank 001. When the two-position two-way reversing solenoid valve F4 and the reversing solenoid valve F5 are energized at the same time, the yaw motor brake is released, and the yaw motor can rotate.

One end of the main oil circuit P is connected to the double-connected internal meshing pump 101, and the other end is connected to the first interface of the two-position four-way reversing solenoid valve F6 through the parallel check valve D1, filter G1, and check valve D2 in sequence. The second port of the two-position four-way reversing solenoid valve F6 is connected to the one-way valve D3. There is also a branch oil path between the filter G1 and the one-way valve D2, and the overflow valve F2 is arranged on the branch oil path and also leads to the oil tank 001 through the filter G2. The filter G1 filters the oil pumped by the double internal meshing pump 101 to ensure the cleanliness of the oil in the main oil circuit P. If the filter G1 is blocked, the oil pumped by the double internal meshing pump 101 will flow through the one-way valve D1, and the overflow valve F2 is also a one-way pressure valve to limit the pressure of the main oil circuit P. When the oil pressure in the main oil circuit P is in the normal range, the relief valve F2 is closed, once the oil pressure in the main oil circuit P exceeds the set value (150bar in this embodiment), the relief valve F2 will automatically Open and drain excess oil into tank 001 after being filtered by filter G2. The two-position four-way reversing solenoid valve F6 is a solenoid valve used for switching oil circuits. Under normal circumstances, the first port and the second port are connected, and the first port and the third port are not connected. When the power is on, the first port and the third port are connected, and the first port and the second port are not connected.

As shown in Figure 2, the yaw unit 200 includes three yaw motors 201, three yaw motor brakes 202, six yaw brakes 203, H-type reversing solenoid valve F9, overflow valve F8, reversing solenoid Valve F5, reversing solenoid valve F7, sequence valve F10, reversing solenoid valve F11. Among them, the three yaw motor brakes 202 are connected in parallel to the sequence valve F3, and the three yaw motors 201 are braked under the condition of oil loss. When the yaw motor 201 is to be started, the oil in the auxiliary oil circuit P1 passes through the sequence valve F3 injects oil into the yaw motor brake 202 to loosen the yaw motor brake 202 and release the yaw motor 201 . There is also a branch oil passage leading to the oil tank 002 between the yaw motor brake 202 and the sequence valve F3, and the branch oil passage is connected with a reversing solenoid valve F5. The function of the reversing solenoid valve F5 is to relieve the pressure of the yaw motor brake 202 when the yaw motor 201 is not working, so that the yaw motor brake 202 returns to the state of braking the yaw motor 201 .

The H-type reversing solenoid valve F9 has four ports, the first port is connected to the third port of the two-position four-way reversing solenoid valve F6, the second port is connected to the oil tank 001 through the filter G2, and the three yaw motors 201 are connected in parallel Between the 3rd and 4th ports of the H-type reversing solenoid valve F9. When the H-type reversing solenoid valve F9 does not need the yaw motor to work, the H-type reversing solenoid valve F9 is de-energized, and the oil coming in from the third port of the two-position four-way reversing solenoid valve F6 will pass through the H-type reversing solenoid valve F9. The first port, point a, point b, and second port of the reversing solenoid valve F9 flow into the oil tank 001, and will not drive the yaw motor; when the A direction of the H-type reversing solenoid valve F9 is energized, the reversing solenoid The first port and the third port of the valve F9 will be connected, and the fourth port will be connected with the second port. The oil coming in from the third port of the two-position four-way reversing solenoid valve F6 will pass through the H-type reversing solenoid valve F9. The 1st port, the 3rd port, the yaw motor 201, the 4th port, and the 2nd port flow into the oil tank 001 to drive the yaw motor 201 to rotate forward; when the B direction of the H-type reversing solenoid valve F9 is energized, the The first port and the fourth port of the solenoid valve F9 will be connected, the third port and the second port will be connected, and the oil coming in from the third port of the two-position four-way reversing solenoid valve F6 will pass through the H-type reversing solenoid valve The first port, the fourth port, the yaw motor 201, the third port, and the second port of F9 flow into the fuel tank 001 to drive the yaw motor 201 to rotate in reverse. Just like this, the yaw motor 201 is driven forward and reverse to rotate, so that the steering of the wind turbine can be controlled.

In order to limit the pressure of the oil flowing into the hydraulic motor 201, one end of the relief valve F8 is connected to the first port of the H-type reversing solenoid valve F9, and the other end is also connected to the oil tank 001 through the filter G2. When the oil pressure flowing into the hydraulic motor 201 exceeds the set value (85 bar in this embodiment), the excess oil will flow into the oil tank 001 through the overflow valve F8.

Between the sequence valve F3 and the brake of the yaw motor, there is also a branch oil circuit connected to the first interface of the H-type reversing solenoid valve through the orifice J1. With this branch oil circuit, a part of the hydraulic oil in the auxiliary oil circuit P1 will flow into the main oil circuit P to jointly supply oil to the yaw motor 201 and increase power for the yaw motor 201 . After the six yaw brakes 203 are connected in series, the oil inlet is connected to the one-way valve D3 through the reversing solenoid valve F7, the throttle hole J3, and the check valve D4; the oil outlet is connected to the one-way valve D3 through the sequence valve F10 and the reversing solenoid valve F11 1. The filter G2 is connected to the oil tank 001; there is also a branch oil circuit between the orifice J3 and the one-way valve D4, and the branch oil circuit is connected to the accumulator X1. When the yaw motor 201 turns the wind turbine to the position facing the wind direction, the oil fills the six yaw brakes 203 through the check valve D4, the throttle hole J3, and the reversing solenoid valve F7, and the yaw motor 201 is braked. When the yaw motor 201 is not to be braked, the sequence valve F10 and the reversing solenoid valve F11 are opened, and the oil in the yaw brake 203 is released to the fuel tank 001. During the process of injecting oil into the six yaw brakes 203 through the one-way valve D4, the orifice J3, and the reversing solenoid valve F7, a part of the oil will be supplied to the reservoir from the branch oil path between the orifice J3 and the one-way valve D4. The energy storage device X1 is used to maintain the pressure of the yaw brake 203 during the process of the yaw brake 203 braking the yaw motor 201, so as to prevent the main oil circuit from breaking down when the mechanism breaks down. The energy device X1 can supply oil to the yaw brake 203 to ensure the reliability of the braking performance.

The parking brake unit 300 includes two high-speed spindle brakes 301, a position feedback valve F14, a two-position three-way solenoid valve F13 with manual reversing, a manual pump 302, and an accumulator X4. Among them, the position feedback valve F14 has a position sensor, and the control signal given can control the wind turbine not to start when the main shaft is locked. The position feedback valve F14 has four ports, the first port is connected to the one-way valve D3, the second port is connected to the oil tank 003, the third port is connected to the two-position three-way solenoid valve with manual reversing through the one-way valve D6 and one-way valve D5 The first port of F13, the second port of F13 with two-position three-way manual reversing solenoid valve is connected to the fuel tank 003, the third port of two-position three-way with manual reversing solenoid valve F13 is connected to orifice J4; two high-speed spindles The brakes 301 are connected in series, the oil inlet end is connected to the orifice J4, and the oil outlet is connected to the accumulator X4. When the mechanism stops supplying oil, the orifice J4 prevents the oil from leaking too quickly, and the pressure of the accumulator X4 can be replenished. The loss of pressure achieves the function of holding pressure. The two-position three-way electromagnetic valve F13 with manual reversing can be controlled automatically by electromagnets or manually to ensure that the mechanism works in the power-off state when the mechanism fails.

A branch oil circuit is connected between the one-way valve D5 and the one-way valve D6, the branch oil circuit is connected to the oil outlet of the manual pump 302, and the oil inlet of the manual pump 302 is connected to the oil tank 004, in order to limit the pressure of the branch circuit , the oil outlet of the manual pump 302 is also connected to a relief valve F15, and the relief valve F15 is connected to the oil tank 003. The position feedback valve F14 is usually disconnected, and the oil cannot enter the high-speed main shaft brake 301, so the wind turbine can rotate and work to generate electricity. If it is necessary to stop the wind turbine, let the position feedback valve F14 be energized, then the first port and the third port are connected, and the two-position three-way solenoid valve F13 with manual reversing is energized to make the first and third ports Connect, let oil inject in the high-speed main shaft brake 301, make this high-speed main shaft brake 301 lock the wind turbine main shaft, let the wind turbine stop running. When the wind turbine is working, de-energize the two-position three-way solenoid valve F13 with manual reversing, connect the second port and the third port of the two-position three-way solenoid valve F13 with manual reversing, and release the high-speed spindle brake 301 In the fuel tank 003, the high-speed main shaft brake 301 has just released the main shaft of the wind turbine, and the wind turbine can rotate to generate electricity. When the mechanism breaks down and is maintained, the manual pump 302 can be used to pump oil in the high-speed main shaft brake 301 to check the mechanism.

In order to ensure the stability of the oil pressure of the main oil circuit P entering the parking brake unit 300 , the mechanism pressure maintaining unit 600 includes a relief valve F12 and two accumulators X2 and X3 . The two accumulators X2 and X3 are connected in parallel to each other and then connected to the main oil circuit P. One end of the overflow valve F12 is connected to the main oil circuit P, and the other end is connected to the oil tank 003. When the oil pressure in the main oil circuit P exceeds the set value (this When the embodiment is 200 bar), the overflow valve F12 is opened to relieve the pressure of the main oil circuit P. When the oil pressure of the main oil circuit P is not enough, the accumulators X2 and X3 can fill the main oil circuit with oil to maintain the oil pressure.

The pitch unit 400 includes three pitch cylinders 401, a servo valve F19, two balance valves F17, D11 and two one-way valves D10, D11.

Among them, the servo valve F19 has four ports, the first port is connected to the main oil circuit P through the ball valve Q1; the second port is connected to the oil tank 005 through the one-way valve D9, the balance valve F17 and the balance valve F18 are valves with the same structure, each with Three ports, the third port of the servo valve F19 is connected to the first port of the balance valve F17, the fourth port of the servo valve F19 is connected to the first port of the balance valve F18, the second port of the balance valve F17 is connected to the balance valve The second port of F18 is connected to the oil tank 005 through the one-way valve D9, and the three pitch cylinders 401 are connected in parallel between the third port of the balance valve F17 and the third port of the balance valve F18, and the one-way valve D10 is connected in parallel with the balance valve F17 , that is, one end is connected to the first port of the balance valve F17, and the other end is connected to the third port of the balance valve F17; the one-way valve D11 is connected in parallel to the balance valve F18, that is, one end is connected to the first port of the balance valve F18, and the other end is connected to the balance valve The third interface of F18. In addition, the hydraulic switches of the two balance valves F17 and D11 are connected to the oil circuit between the first port of the servo valve F19 and the ball valve Q1. When there is pressure on the main oil circuit P, the balance valves F17 and F18 are opened.

The role of the servo valve F19 here is very critical, it can control the deflection angle of the pitch blade, and the balance valves F17 and F18 mainly play the role of buffering here. When the blade needs to be deflected, the mechanism will send a signal to the servo valve F19, and the servo valve F19 will automatically control the required deflection angle. When the first port and the fourth port are connected, and the second port and the third port are connected, the main oil circuit P The hydraulic oil in the hydraulic oil passes through the one-way valve D11 to push the pitch cylinder 401 to the left for a certain displacement, and the oil in the pitch cylinder 401 pushes the balance valve F17 back to the oil tank 005 through the one-way valve D9. At this time, the blades of the wind turbine Turn forward by a certain angle. When the first port and the third port of the servo valve F19 are connected, and the second port and the fourth port are connected, the hydraulic oil circuit in the main oil circuit P will push the pitch cylinder 401 to the right for a certain displacement through the one-way valve D10 , the oil in the pitch-changing oil cylinder 401 pushes the balancing valve F18 back in the oil tank 005 through D9, and at this moment the blades of the wind turbine reversely rotate a certain angle. In this way, the change of the blade angle of the wind turbine is realized.

There are three safety braking units 500, which respectively perform safety braking for the three blades after pitch adjustment. The three safety braking units 500 are connected in parallel between the third and fourth ports of the double electromagnetic ball valve F16. The first port of the ball valve F16 is connected to the one-way valve D8, the one-way valve D8 is connected to the one-way valve D3 through the ball valve Q1, and the second port of the double electromagnetic ball valve F16 is connected to the oil tank 005.

The safety brake unit 500 includes a safety oil cylinder 501, a hydraulic control check valve F20, a hydraulic control check valve F22, a cartridge valve F21, and an accumulator X5. One port of each safety cylinder 501 is connected to the third port of the double electromagnetic ball valve F16 through the hydraulic control check valve F20, the hydraulic control check valve F22, the hydraulic control switch of the hydraulic control check valve F20, and the hydraulic control check valve F22 Connect to another port of the safety cylinder 501. The 4th port of the double electromagnetic ball valve F16 is divided into 3 routes, the first route is directly connected to the other end of the safety cylinder 501, the second route is connected to the third port of the double solenoid ball valve F16 through the throttle valve J4, and the third route is connected to the check valve D12, the one-way valve D12 is divided into two circuits, one is connected to the accumulator X5, and the other is connected to the oil circuit between the hydraulic control check valve F20 and the hydraulic control check valve F22 through the cartridge valve F21; Connect a throttle valve J5 in parallel.

When the wind power generation equipment needs to start the safety mechanism, the hydraulic oil flowing out from the main oil circuit P through the third port of the double electromagnetic ball valve F16 is divided into two circuits through the hydraulic control check valve F22, and the cartridge valve F21 is pushed open on the one circuit to connect it. Through charging the accumulator X5, all the way directly through the hydraulic control check valve F20 to push out the safety brake oil cylinder 501 to stop the blades from rotating to realize safety brake. When it is necessary to change the pitch of the blades, both sides of the double electromagnetic ball valve F16 are energized at the same time for reversing, the first port and the fourth port are connected, the second port and the third port are connected, and the main oil circuit P passes through the double electromagnetic ball valve F16 The hydraulic oil flowing out of the fourth port is divided into two paths at the one-way valve D12, and one path is charged to the accumulator X5 through the one-way valve D12. When there is pressure on the road, the hydraulic control check valve F22 is opened, and the hydraulic oil flows directly back to the oil tank 005 through the hydraulic control check valve F22. The hydraulic control switch opens the hydraulic control check valve F20 and the hydraulic control check valve F22, and the hydraulic oil in the safety brake cylinder 501 flows back to the oil tank 005 through the hydraulic control check valve F20 and the hydraulic control check valve F22. When the mechanism is powered off, the accumulator X5 can release energy to push the cartridge valve F21 back and push the safety brake oil cylinder 501 out through the hydraulic control check valve F20 to realize safety brake. The safety brake oil cylinder 501 has only two states. When the oil cylinder is pushed out and is in the safe position, the paddle cannot rotate, and when the oil cylinder is released, the paddle can rotate. The main function of throttle valves J14 and J15 here is to unload the hydraulic oil in safety brake cylinder 501 or accumulator X5 when safety brake cylinder 501 or accumulator X5 needs to be replaced or maintained, so that maintenance is in a safe state.

The third port of the balance valve F17 is also connected to the fourth port of the double electromagnetic ball valve F16 through the one-way valve D7. The one-way valve D7 can quickly release the pressure of the pitch cylinder 401 .

In addition, in order to be able to monitor the status of the mechanism, other relevant hydraulic devices, such as pressure gauges, pressure switches, etc., will be connected to the corresponding positions of the mechanism. Through the above detailed description, it can be found that the mechanism for controlling the steering, pitch and braking of the wind power generation equipment of the present invention can realize the following functions.

1. The yaw unit can rotate the wind turbine according to the wind direction signal, so that the wind turbine can always face the maximum direction of the wind and maximize the use of wind energy.

2. When the energy of the battery of the wind turbine is saturated or the wind turbine needs maintenance, the stop brake unit can lock the main shaft of the wind turbine to stop the blades from rotating.

3. The pitch unit can automatically adjust the angle of the blades of the wind turbine, so that the output power can be controlled according to the speed of the wind rotor.

4. When the wind turbine is subjected to a wind force beyond its ability to bear or needs to stop the wind turbine, the safety brake unit can brake the blades urgently to ensure the safety of the wind power generation equipment.

Therefore, the mechanism of the utility model for controlling steering, pitch change, and braking of wind power generation equipment realizes effective control of wind turbine steering, shutdown, pitch change, and safety braking, which contributes to the power generation efficiency of wind power generation equipment and the safety of equipment operation The improvement also contributes to the convenience of equipment maintenance.

However, those skilled in the art should realize that the above-mentioned specific implementation is only exemplary, and it is for better understanding of the patent by those skilled in the art, and should not be understood as limiting the scope of the patent; as long as it is based on this Any equivalent change or modification of the spirit disclosed in the patent falls within the scope of this patent.

Claims (23)

1, a kind ofly control the mechanism that wind power plant turned to, became oar, braking, it is characterized in that:

The major and minor oil circuit that comprises hydraulic power unit, is connected with hydraulic power unit, and be connected driftage unit on the major and minor oil circuit, shut down brake unit, become oar unit, safety brake unit;

Described hydraulic power unit is a fuel feeding in major and minor oil circuit, for other each cell operation provides required oil pressure;

Described driftage unit is over against wind direction according to direction signal control pneumatic equipment blades made;

Described shutdown brake unit is braked the wind energy conversion system main shaft for when wind energy conversion system need shut down;

Described change oar unit is the control break blade angle;

Described safety brake unit is that the blade behind the change oar carries out safety brake.

2, control wind power plant according to claim 1 turns to, becomes the mechanism of oar, braking, it is characterized in that: described working connection is bindiny mechanism's pressurize unit also, and this mechanism pressurize unit is that working connection carries out pressurize.

3, control wind power plant according to claim 1 turns to, becomes the mechanism of oar, braking, it is characterized in that: described hydraulic power unit comprises duplex internally engaging pump, sequence valve F3 and two-position four-way reversing solenoid valve F6, described duplex internally engaging pump generates a working connection and an auxiliary oil circuit, described auxiliary oil circuit order of connection valve F3, working connection connects the 1st interface of two-position four-way reversing solenoid valve F6, and the 2nd interface of two-position four-way reversing solenoid valve F6 is connected with one-way valve D3.

4, control wind power plant according to claim 3 turns to, becomes the mechanism of oar, braking, it is characterized in that: also be connected with an oil circuit that leads to fuel tank through relief valve F1 between described duplex internally engaging pump and the sequence valve F3.

5, control wind power plant according to claim 4 turns to, becomes the mechanism of oar, braking, it is characterized in that: described relief valve F1 goes up two-position four-way reversing solenoid valve F4 also in parallel.

6, turn to, become the mechanism of oar, braking according to claim 3 or 4 or 5 described control wind power plants, it is characterized in that: also be connected with one-way valve D1 and filter parallel with one another between described duplex internally engaging pump and the two-position four-way reversing solenoid valve F6.

7, control wind power plant according to claim 6 turns to, becomes the mechanism of oar, braking, it is characterized in that: be connected with an oil circuit that leads to fuel tank through relief valve F2 between described filter and the two-position four-way reversing solenoid valve F6.

8, control wind power plant according to claim 3 turns to, becomes the mechanism of oar, braking, it is characterized in that: described driftage unit comprises yaw motor, yaw motor brake, driftage brake and H type reversing solenoid valve F9; Described yaw motor brake order of connection valve F3; The 1st interface of described H type reversing solenoid valve F9 connects the 3rd interface of two-position four-way reversing solenoid valve F6, connects yaw motor between the 3rd, 4 interfaces of H type reversing solenoid valve F9, and the 2nd interface of H type reversing solenoid valve F9 connects fuel tank; Described one-way valve D3 connects driftage brake oil inlet end through reversing solenoid valve F7, and driftage brake oil outlet end connects fuel tank through sequence valve F10, reversing solenoid valve F11.

9, control wind power plant according to claim 8 turns to, becomes the mechanism of oar, braking, it is characterized in that: described yaw motor has three, and these three yaw motor are parallel with one another; Described yaw motor brake has three, and these three yaw motor brakes are parallel with one another; Described driftage brake has six, and these six driftage brakes are cascaded.

10, control wind power plant according to claim 8 turns to, becomes the mechanism of oar, braking, it is characterized in that: be connected with an oil circuit that leads to fuel tank through reversing solenoid valve F5 between described sequence valve F3 and the yaw motor brake.

11, according to Claim 8 or 9 or 10 described control wind power plants turn to, become the mechanism of oar, braking, it is characterized in that: also be connected with an oil circuit that is connected to H type reversing solenoid valve the 1st interface between described sequence valve F3 and the yaw motor brake.

12, control wind power plant according to claim 11 turns to, becomes the mechanism of oar, braking, it is characterized in that: described H type reversing solenoid valve the 1st interface also connects an oil circuit that leads to fuel tank through relief valve F8.

13, control wind power plant according to claim 8 turns to, becomes the mechanism of oar, braking, it is characterized in that: be connected with one-way valve D4 between described one-way valve D3 and the reversing solenoid valve F7, be connected with an oil circuit that is connected to accumulator X1 between this one-way valve D4 and the reversing solenoid valve F7.

14, control wind power plant according to claim 3 turns to, becomes the mechanism of oar, braking; it is characterized in that: described shutdown brake unit comprises high-speed main spindle brake and position feedback valve F14; the 1st interface of described position feedback valve F14 connects one-way valve D3; the 3rd interface of position feedback valve F14 connects the oil inlet end of high-speed main spindle brake, and the 2nd interface of position feedback valve F14 connects fuel tank.

15, control wind power plant according to claim 14 turns to, becomes the mechanism of oar, braking, it is characterized in that: described high speed brake has two, and these two high speed brakes are cascaded.

16, control wind power plant according to claim 14 turns to, becomes the mechanism of oar, braking, it is characterized in that: described shutdown brake unit also includes accumulator X4, and this accumulator X4 is connected the oil outlet end of high-speed main spindle brake.

17, turn to, become the mechanism of oar, braking according to claim 14 or 15 or 16 described control wind power plants, it is characterized in that: described shutdown brake unit also comprises hand pump and two-position three way band manual reverse of direction solenoid valve F13, described two-position three way band manual reverse of direction solenoid valve F13 is between high-speed main spindle brake and position feedback valve F14, the 3rd interface of its 1st interface link position feedback valve F14, the 3rd interface connects the oil inlet end of high-speed main spindle brake, and the 2nd interface connects fuel tank; The oil inlet end of hand pump connects fuel tank, and oil outlet end connects the 1st interface of two-position three way band manual reverse of direction solenoid valve F13.

18, control wind power plant according to claim 17 turns to, becomes the mechanism of oar, braking, it is characterized in that: also be connected with an oil circuit that leads to fuel tank via relief valve F15 between described two-position three way band manual reverse of direction solenoid valve F13 and the hand pump.

19, control wind power plant according to claim 3 turns to, becomes the mechanism of oar, braking, it is characterized in that: described change oar unit comprises change oar oil cylinder, servovalve F19, two equilibrium valve F17, F18, one-way valve D10, D11; Described servovalve F19 the 1st interface connects one-way valve D3, the 2nd interface connects fuel tank, the 3rd interface connects the 1st interface of equilibrium valve F17, the 4th interface connects the 1st interface of equilibrium valve F18, the 2nd interface of two equilibrium valve F17, F18 all connects fuel tank, connecting between the 3rd interface of two equilibrium valve F17, F18 and become the oar oil cylinder. one-way valve D10 is connected in parallel on the equilibrium valve F17, and one-way valve D11 is connected in parallel on the equilibrium valve F18.

20, control wind power plant according to claim 19 turns to, becomes the mechanism of oar, braking, it is characterized in that: described one-way valve D3 is also connected to the 1st interface of two Solenoid ball valve F16, the 2nd interface of two Solenoid ball valve F16 connects fuel tank, described safety brake unit has three, be respectively three blades that become behind the oar and carry out safety brake, these three safety brake units are connected in parallel between the 3rd interface and the 4th interface of two Solenoid ball valve F16.

21, control wind power plant according to claim 20 turns to, becomes the mechanism of oar, braking, it is characterized in that: described safety brake unit comprises safe oil cylinder, Pilot operated check valve F20, described Pilot operated check valve F20 one end connects the 3rd interface of two Solenoid ball valve F16, one port of the other end attachment security oil cylinder, the 4th interface of the another port attachment security oil cylinder of safe oil cylinder and the hydraulic control switch of Pilot operated check valve F20.

22, control wind power plant according to claim 21 turns to, become oar, the mechanism of braking, it is characterized in that: described safety brake unit also comprises Pilot operated check valve F22, cartridge valve F21, accumulator X5, one-way valve 12, described Pilot operated check valve F22 is between the 3rd interface and Pilot operated check valve F20 of two Solenoid ball valve F16, the another port of its hydraulic control switch attachment security oil cylinder, one-way valve D12 connects the 4th interface of two Solenoid ball valve F16, one-way valve D12 one tunnel connects accumulator X5 then, another road connects cartridge valve F21, connect cartridge valve F21 again with Pilot operated check valve F20 and Pilot operated check valve F22 between oil circuit be connected.

23, control wind power plant according to claim 2 turns to, becomes the mechanism of oar, braking, it is characterized in that: described mechanism pressurize unit comprises two accumulator X2, X3 and a relief valve F12, connect after two accumulator X2, the X3 parallel connection and be connected with working connection, relief valve F12 one end connects working connection, and an end connects fuel tank.

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