Self-adaptive locking hydraulic coupler for transmission chain of wind turbine generator

Abstract

The invention discloses a self-adaptive locking hydraulic coupler for a transmission chain of a wind turbine generator, and belongs to the technical field of wind power generation. The device comprises an electromagnetic valve, a guide wheel, a turbine, a pump wheel, a signal monitoring controller, an input shaft, a locking piston, a damping assembly and a sensor. The sensor monitors equipment vibration and temperature parameters in real time and transmits the parameters to the signal monitoring controller through a cable. The signal monitoring controller controls the displacement direction of the electromagnetic valve according to monitoring data, so that the joint state of the locking piston is adjusted, and self-adaptive switching between rigid transmission and flexible transmission is achieved; the hydraulic coupler alarm assembly receives an alarm signal of the signal monitoring controller through a cable, and real-time reporting of a fault is achieved. According to the device, the design that a low-viscosity synthetic oil medium is matched with a light-weight corrosion-resistant material shell is adopted, hydraulic transmission loss and impact damage are effectively reduced, and the service life is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to a self-adaptive locking hydraulic coupler for a wind turbine transmission chain, which is used for optimizing the transmission mode of a wind power generator, reducing system impact and vibration, and improving the reliability of the power generator, and belongs to the field of power transmission of wind power generators. BACKGROUND

[0002] Wind power generation, as an important technology of green energy system, has strategic significance for global energy transformation. Currently, mainstream wind power generators mainly adopt gear box speed increasing transmission and direct drive transmission two technical routes: the former realizes speed matching through multiple gear pairs, and the latter adopts a permanent magnet synchronous generator to directly couple a blade wheel shaft.

[0003] The existing transmission scheme faces significant technical contradictions: the gear box transmission system has high mechanical complexity, and exposes problems of intensive maintenance frequency and high failure rate of gears and bearings; the direct drive system, although eliminating the gear box to reduce mechanical failure risk, leads to an excessively large size of the unit due to the need to configure an oversized generator, and simultaneously causes an industrialization problem of a sharp increase in the cost of magnetic steel materials. The traditional technical route is difficult to achieve collaborative optimization in the dimensions of reliability, economy and compactness.

[0004] Some researches propose to integrate a hydraulic coupler into a wind power generator to reduce the damage of impact working conditions to gear and bearing components. However, the inherent transmission loss problem of the hydraulic coupler in engineering practice leads to low transmission efficiency, which becomes a technical obstacle restricting its application in wind power scenarios.

[0005] The application innovatively introduces a self-adaptive locking hydraulic coupler into a wind power transmission system, and proposes a wind power generator hydraulic coupling transmission method based on variable working condition self-adaptation. By controlling the locking clutch inside the coupler, flexible transmission is adopted to absorb turbulent impact under non-stationary working conditions, and rigid transmission is switched to improve energy conversion efficiency under stable working conditions, so as to improve the reliability and efficiency of the transmission system. SUMMARY

[0006] The application provides a self-adaptive locking hydraulic coupler for a wind power generator transmission chain, which aims to solve the problems of mechanical damage caused by impact vibration of the wind power generator transmission system and large energy loss of the traditional hydraulic coupler, and improve the stability of the power transmission of the wind power generator, thereby prolonging the service life of the wind power generator transmission system. The invention content is as follows:

[0007] 1. A self-adaptive locking hydraulic coupler for a wind power generator transmission chain is installed at the rear of a wind blade wheel (1) and a main shaft system (2), and the front of a gear box (4) and a generator (5), wherein the wind turbine blade wheel (1), the main shaft system (2), the self-adaptive locking hydraulic coupler (3), the gear box (4) and the generator (5) are arranged on the same axis.

[0008] 2. The adaptive locking hydraulic coupler for the wind turbine transmission chain comprises a solenoid valve (7), a guide wheel (8), a turbine (9), a pump wheel (10), a signal monitoring controller (11), a hydraulic coupler alarm component (12), an input shaft (13), a locking piston (14), a vibration reduction component (15), a power supply (16), and a sensor (17).

[0009] 3. The sensor (17) is used to monitor temperature and vibration signals and is connected to the signal monitoring controller (11) through the cable (6); the signal monitoring controller (11) controls the displacement direction of the solenoid valve (7) through the cable (6) to adjust the engagement state of the locking piston (14).

[0010] 4. The hydraulic coupler alarm component (12) is connected to the signal monitoring controller (11) via a cable (6) and is used to receive alarm signals and report faults in a timely manner.

[0011] 5. The working medium of the adaptive locking hydraulic coupling for the wind turbine transmission chain is low-viscosity synthetic oil. Low-viscosity synthetic oil has low viscosity and good lubricity, reducing internal friction and energy loss, thereby improving transmission efficiency.

[0012] 6. The housing of the adaptive locking hydraulic coupler for the wind turbine transmission chain is made of lightweight and corrosion-resistant material.

[0013] 7. The operating method of the adaptive locking hydraulic coupling for the wind turbine transmission chain comprises the following steps:

[0014] a. Wind energy drives the fan impeller (1) to drive the main shaft (2) to rotate;

[0015] b. The adaptive locking hydraulic coupling (3) controls the displacement direction of the solenoid valve (7) through the signal monitoring controller (11) according to the temperature and vibration signals monitored by the sensor (17), and switches the flexible connection or rigid connection mode to transmit power to the gearbox;

[0016] c. The power is increased in speed by the gearbox (4) and then transmitted to the generator (5) for power generation.

[0017] 8. The steps of the rigid connection mode of the wind turbine transmission chain using the adaptive locking hydraulic coupling are as follows:

[0018] The solenoid valve (7) is controlled to move to the left, the locking piston (14) is engaged, and the pump wheel (10) directly transmits power to drive the turbine (9) to rotate.

[0019] 9. The steps of the wind turbine transmission chain using the adaptive locking hydraulic coupling flexible connection mode are as follows:

[0020] The electromagnetic valve (7) is controlled to move rightward, the locking piston (14) is separated, and the pump wheel (10) transmits power through the oil to drive the turbine (9) to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , Schematic diagram of the installation position of the adaptive locking hydraulic coupling for the wind turbine transmission chain;

[0022] Figure 2 ,Schematic diagram of the rigid connection structure of the adaptive locking hydraulic coupling for the wind turbine transmission chain;

[0023] Figure 3 ,Schematic diagram of the flexible connection structure of the adaptive locking hydraulic coupling for the wind turbine transmission chain;

[0024] Among them: 1- fan impeller, 2- main shaft system, 3- adaptive locking hydraulic coupling, 4- gearbox, 5- generator, 6- cable, 7- solenoid valve, 8- guide wheel, 9- turbine, 10- pump wheel, 11- signal monitoring controller, 12- hydraulic coupling alarm component, 13- input shaft, 14- locking piston, 15- vibration reduction component, 16- power supply, 17- sensor. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] 1. Such as Figure 1 As shown, an adaptive locking hydraulic coupling for a wind turbine transmission chain is installed behind a fan wheel (1) and a main shaft system (2) and in front of a gear box (4) and a generator (5), wherein the fan wheel (1), the main shaft system (2), the adaptive locking hydraulic coupling (3), the gear box (4) and the generator (5) are arranged on the same axis.

[0027] 2. Such as Figure 2 As shown, the adaptive locking hydraulic coupler for the wind turbine transmission chain includes a solenoid valve (7), a guide wheel (8), a turbine (9), a pump wheel (10), a signal monitoring controller (11), a hydraulic coupler alarm component (12), an input shaft (13), a locking piston (14), a vibration reduction component (15), a power supply (16), and a sensor (17).

[0028] 3. Such as Figure 2As shown, the sensor (17) is used to monitor temperature and vibration signals, and is connected with the signal monitoring controller (11) through the cable (6); the signal monitoring controller (11) controls the displacement direction of the electromagnetic valve (7) through the cable (6) to adjust the engagement state of the locking piston (14).

[0029] 4. As shown in Figure 2 The hydraulic coupling alarm assembly (12) is connected with the signal monitoring controller (11) through the cable (6) to receive alarm signals and timely report faults.

[0030] 5. The working medium of the adaptive locking hydraulic coupling (3) adopts low-viscosity Kunlun Tian Gong No. 8 hydraulic transmission oil; the shell of the adaptive locking hydraulic coupling (3) is made of lightweight corrosion-resistant material 7075 aluminum alloy, which can reduce energy loss and improve service life.

[0031] 6. As shown in Figure 1 The working method of the adaptive locking hydraulic coupling for the wind turbine transmission chain comprises the following steps:

[0032] a. The wind energy drives the fan impeller (1) to rotate the main shaft system (2);

[0033] b. The adaptive locking hydraulic coupling (3) controls the displacement direction of the electromagnetic valve (7) through the signal monitoring controller (11) according to the temperature and vibration signals monitored by the sensor (17), and switches between flexible connection and rigid connection modes;

[0034] c. The power is transmitted to the generator (5) for power generation after being speeded up by the gear box (4).

[0035] 7. As shown in Figure 2 The signal acquisition and processing method: the sensor (17) acquires the hydraulic coupling shell temperature (monitoring range-30℃ to 120℃) and vibration amplitude (monitoring range 0 to 20g) in real time, and the sampling frequency is 10kHz. The signal monitoring controller (11) has a threshold judgment module: when the temperature is >85℃ or the vibration amplitude is >2g, it is determined as "impact working condition"; when the temperature is ≤85℃ and the vibration amplitude is ≤2g, it is determined as "smooth working condition". The alarm triggering condition is that when the temperature is >100℃ or the vibration amplitude is >10g for 30 seconds continuously, the signal monitoring controller (11) generates an alarm signal, which is uploaded to the remote monitoring center through the hydraulic coupling alarm assembly (12).

[0036] 8. The specific steps of the rigid connection mode are:

[0037] As Figure 2As shown, the temperature and vibration signals of the adaptive locking hydraulic coupling (3) are measured by the sensor (17), transmitted to the signal monitoring controller (11) through the cable (6) for analysis, and judged to be a "stable working condition", the signal monitoring controller (11) controls the solenoid valve (7) to move to the left through the cable (6), the right oil chamber is unblocked, the pressure in the left oil chamber is relatively low, the locking piston (14) is engaged, and the power is transmitted from the locking piston (14) to the turbine (9) through the pump wheel (10). The pump wheel and the turbine rotate together, realizing a mechanical rigid connection and increasing the transmission efficiency.

[0038] 9. The specific steps of the flexible connection mode are:

[0039] like Figure 3 As shown, the temperature and vibration signals of the adaptive locking hydraulic coupler (3) are measured by the sensor (17), transmitted to the signal monitoring controller (11) through the cable (6) for analysis, and judged to be an "impact working condition", the signal monitoring controller (11) controls the solenoid valve (7) to move to the right through the cable (6), the left oil chamber is unblocked, the locking piston (14) is pushed open, and the pump wheel (10) drives the turbine (9) to rotate through the oil shear force, effectively attenuating the impact load during operation.

[0040] Any content not described in detail in this specification belongs to the prior art known to those skilled in the art. The above is a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An adaptive locking hydraulic coupling for a wind turbine transmission chain, characterized in that: It is installed behind the fan impeller (1) and the main shaft (2) and in front of the gear box (4) and the generator (5), and the fan impeller (1), the main shaft (2), the adaptive locking fluid coupling (3), the gear box (4) and the generator (5) are arranged on the same axis.

2. The adaptive locking hydraulic coupling for a wind turbine transmission chain according to claim 1, characterized in that: The invention comprises a solenoid valve (7), a guide wheel (8), a turbine (9), a pump wheel (10), a signal monitoring controller (11), a hydraulic coupler alarm component (12), an input shaft (13), a locking piston (14), a vibration reduction component (15), a power supply (16), and a sensor (17).

3. The adaptive locking hydraulic coupling for a wind turbine transmission chain according to claim 1, characterized in that: The sensor (17) is used to monitor temperature and vibration signals and is connected to a signal monitoring controller (11) via a cable (6); the signal monitoring controller (11) controls the displacement direction of the solenoid valve (7) via the cable (6) to adjust the engagement state of the locking piston (14).

4. The adaptive locking hydraulic coupling for a wind turbine transmission chain according to claim 1, characterized in that: It also includes a hydraulic coupler alarm component (12), which is connected to the signal monitoring controller (11) via a cable (6) and is used to receive alarm signals and report faults in a timely manner.

5. The adaptive locking hydraulic coupling for a wind turbine transmission chain according to claim 1, characterized in that: The working medium of the adaptive locking hydraulic coupling (3) is low-viscosity synthetic oil. Low-viscosity synthetic oil has low viscosity and good lubricity, reduces internal friction and energy loss, and improves transmission efficiency.

6. The adaptive locking hydraulic coupling for a wind turbine transmission chain according to claim 1, characterized in that: The housing of the adaptive locking hydraulic coupler (3) is made of lightweight corrosion-resistant material.

7. A method for operating the adaptive locking hydraulic coupling for a wind turbine transmission chain according to any one of claims 1 to 6, characterized in that: The following steps are involved: a. Wind energy drives the fan impeller (1) to drive the main shaft (2) to rotate; b. The adaptive locking hydraulic coupling (3) controls the displacement direction of the solenoid valve (7) through the signal monitoring controller (11) according to the temperature and vibration signals monitored by the sensor (17), and switches the flexible connection or rigid connection mode to transmit power to the gearbox; c. The power is increased in speed by the gearbox (4) and then transmitted to the generator (5) for power generation.

8. The working method according to claim 7, characterized in that: The steps of the rigid connection mode are: The solenoid valve (7) is controlled to move to the left, the locking piston (14) is engaged, and the pump wheel (10) directly transmits power to drive the turbine (9) to rotate.

9. The working method according to claim 7, characterized in that: The steps of the flexible connection mode are: The electromagnetic valve (7) is controlled to move rightward, the locking piston (14) is separated, and the pump wheel (10) transmits power through the oil to drive the turbine (9) to rotate.

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