Blade angle adjusting device for dynamically adjustable fan blade
Through the design of parallel dual pump oil circuit and pilot pressure regulating valve, combined with plate tee switching device and dual cooler, the problem of unadjustable pressure at the hydraulic station oil outlet is solved, and flexible adjustment of the angle of the air blades and stable operation of the system is achieved.
Patent Information
- Application Number
- CN202422066095.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The pressure of the oil outlet of the existing hydraulic station cannot be adjusted, resulting in the angle of the air blades that cannot be adjusted through the oil pressure, affecting the working effect.
It adopts a parallel dual pump oil circuit design, combined with a pilot pressure regulating valve and a plate three-way switching device to ensure continuous operation of the system; it is also equipped with a dual cooler to adapt to different ambient temperatures and achieve stable control of oil temperature.
It realizes flexible adjustment of the angle of the air blades, improves working results, ensures the system's rapid response and stable output, and has the fault tolerance and efficient cooling function of the backup system.
Smart Images
Figure CN223075868U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an angle adjusting device for the blades of a wind turbine in a hydraulic station. Background Art
[0002] The pressure at the oil outlet of the existing hydraulic station cannot be adjusted. Therefore, the angle of the blades of the wind turbine driven by it cannot be adjusted by oil pressure either, which affects the working effect. Content of the Utility Model
[0003] The purpose of the utility model is to provide a dynamic adjustable blade angle adjusting device for a wind turbine, which is convenient for adjusting the blade angle and improves the working effect.
[0004] The technical solution of the utility model is as follows:
[0005] A dynamic adjustable blade angle adjusting device includes a parallel double-pump oil circuit communicated with an oil tank. The characteristics are as follows: Each oil circuit of the parallel double-pump oil circuit includes an oil pump, and a check valve is connected behind the oil pump; One oil pump in the parallel double-pump oil circuit is in use and the other is in standby; The parallel double-pump oil circuit is connected to a double-barrel filter behind, and a high-pressure ball valve leading to the oil outlet is connected behind the double-barrel filter. A pressure regulating branch is connected between the double-barrel filter and the high-pressure ball valve; The pressure regulating branch includes a parallel pilot-operated pressure regulating valve oil circuit. Each oil circuit of the parallel pilot-operated pressure regulating valve oil circuit includes a pilot-operated pressure regulating valve. The pilot-operated pressure regulating valve is connected to the check valve. The parallel pilot-operated pressure regulating valve oil circuit realizes the switching of two oil circuits through a plate-type three-way valve; The parallel pilot-operated pressure regulating valve oil circuit is connected to a parallel double-cooler oil circuit behind; Each oil circuit in the parallel double-cooler oil circuit includes a ball valve, a plate-type cooler is connected behind the ball valve, and a control valve is connected behind the plate-type cooler; The parallel double-cooler oil circuit communicates with the oil tank.
[0006] The parallel double-pump oil circuit is connected in parallel with a pressure regulating valve.
[0007] The utility model adopts double pilot-operated pressure regulating valves, and the pilot-operated pressure regulating valves are used to set the oil pressure required when adjusting the blade angle. The characteristics are faster response speed, reduced energy loss of the system, and stable oil flow and pressure output.
[0008] The plate-type three-way switching device is designed. Since the pilot-operated pressure regulating valve needs to work continuously without interruption, if the pressure regulating valve fails, the oil flow direction of the system can be changed by switching the plate-type three-way switching device, so that the standby pilot-operated pressure regulating valve enters the working system, and the originally faulty pressure regulating valve can be repaired online to ensure the continuous operation of the system.
[0009] The design of using a dual cooler to cool the oil fluid. In this system, two coolers are designed to cool the oil fluid. During the operation of the system, it can be adjusted in real time according to the on-site ambient temperature. When the ambient temperature is low, a single cooler is used to cool the oil fluid. When the ambient temperature is high, the two coolers are used simultaneously to ensure that the oil temperature of the system meets the operating requirements. Description of the Drawings
[0010] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0011] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model. Detailed Embodiment
[0012] A dynamic adjustment vane blade angle adjustment device includes a parallel dual-pump oil circuit connected to the oil tank 3, and the parallel dual-pump oil circuit is connected in parallel with a pressure regulating valve 4. Each oil circuit of the parallel dual-pump oil circuit includes an oil pump 1, and a check valve 2 is connected behind the oil pump; one oil pump is used and the other oil pump is standby in the parallel dual-pump oil circuit; the parallel dual-pump oil circuit is connected to a double-barrel filter 5, and a high-pressure ball valve 6 leading to the oil outlet is connected behind the double-barrel filter, and a pressure regulating branch is connected between the double-barrel filter and the high-pressure ball valve; the pressure regulating branch includes a parallel pilot-operated pressure regulating valve oil circuit, and each oil circuit of the parallel pilot-operated pressure regulating valve oil circuit includes a pilot-operated pressure regulating valve 7, the pilot-operated pressure regulating valve is connected to a check valve 8, and the parallel pilot-operated pressure regulating valve oil circuit realizes the switching of two oil circuits through a plate three-way valve 9; the parallel pilot-operated pressure regulating valve oil circuit is connected to a parallel dual-cooler oil circuit behind; each oil circuit in the parallel dual-cooler oil circuit includes a ball valve 10, a plate cooler 11 is connected behind the ball valve, and a control valve 12 is connected behind the plate cooler; the parallel dual-cooler oil circuit communicates with the oil tank.
[0013] The return oil circuit 13 of the hydraulic station communicates with the oil tank, and an oil flow indicator 14 is provided on the return oil circuit.
[0014] The oil pressure is controlled by two pilot-operated pressure regulating valves. The pilot-operated pressure regulating valve is used to set the oil pressure required for blade angle adjustment. And two pressure regulating valves are designed in the system. When one valve fails, the standby valve can be put into use to ensure the continuous operation of the system. Features: faster response speed, reduced energy loss of the system, ensuring stable oil flow and pressure output, and achieving the effect of using the valves as backups for each other.
[0015] A plate - type three - way switching device is adopted. Since the pilot - operated pressure valve for regulating the oil pressure in the system needs to work continuously, when this pressure regulating valve fails, the plate - type three - way switching device can be switched to change the flow direction of the system oil, enabling the standby pilot - operated pressure regulating valve to enter the working system for on - line maintenance of the faulty pilot - operated valve, achieving on - line replacement without shutting down the system and ensuring the continuous operation of the oil system.
[0016] The oil is cooled by a double - type cooler. Two oil coolers are designed in this oil system. During system operation, the number of coolers used can be adjusted in real - time according to the on - site ambient temperature and the cooling water temperature. When the ambient temperature is low, a single cooler is used to cool the oil; when the ambient temperature is high, both coolers are used simultaneously. This can better control the oil temperature, keep the oil temperature within a reasonable operating range, and this cooler has high pressure resistance, a small device volume, high heat exchange efficiency, and is convenient for maintenance.
Claims
1. A dynamic adjustable vane blade angle adjusting device, including a parallel double-pump oil circuit communicated with an oil tank, characterized in that: Each oil circuit of the parallel dual-pump oil circuit includes an oil pump, and a check valve is connected after the oil pump; one oil pump is in use and the other is in standby in the parallel dual-pump oil circuit; the parallel dual-pump oil circuit is connected to a double-barrel filter, and a high-pressure ball valve leading to the oil outlet is connected after the double-barrel filter, and a pressure regulating branch is connected between the double-barrel filter and the high-pressure ball valve; the pressure regulating branch includes a parallel pilot-operated pressure regulating valve oil circuit, and each oil circuit of the parallel pilot-operated pressure regulating valve oil circuit includes a pilot-operated pressure regulating valve, the pilot-operated pressure regulating valve is connected to the check valve, and the parallel pilot-operated pressure regulating valve oil circuits realize the switching of the two oil circuits through a plate-type three-way valve; the parallel pilot-operated pressure regulating valve oil circuit is connected to a parallel dual-cooler oil circuit; each oil circuit in the parallel dual-cooler oil circuit includes a ball valve, a plate-type cooler is connected after the ball valve, and a control valve is connected after the plate-type cooler; the parallel dual-cooler oil circuit communicates with the oil tank.
2. The blade angle adjustment device of the dynamic adjustment airfoil blade according to claim 1, characterized in that: The parallel dual-pump oil circuit is connected in parallel with a pressure regulating valve.