Hydraulic variable pitch system

Abstract

The utility model relates to the technical field of fan variable pitch, in particular to a hydraulic variable pitch system which comprises a hydraulic station and connecting oil nozzles, and the outer side of the hydraulic station is connected with a plurality of connecting oil nozzles. A detection assembly is further installed on the side face of the hydraulic station. An alarm and a controller are installed on the front side of the hydraulic station, the top of the oil receiving hopper is fixedly connected with a filtering film, the bottom of the oil receiving hopper communicates with a communicating pipe, the other side of the communicating pipe communicates with a collecting barrel, and an oil level sensor is installed on the top of the collecting barrel; when the joint leaks, the oil receiving hopper can collect leaked oil in a centralized manner and gather the leaked oil to the bottom of the oil receiving hopper, the oil flows into the collecting barrel through the communicating pipe, the oil level sensor can monitor the leaked oil in time, the controller controls the alarm to start and is used for reminding a worker, the arrangement can remind the worker in time, and the working efficiency is improved. And the arranged sealing plug can be used for discharging hydraulic oil in the collecting barrel, and subsequent recycling is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine pitch control, in particular to a hydraulic pitch control system. Background Art

[0002] Wind power generation converts the kinetic energy of wind into mechanical kinetic energy, and then converts mechanical energy into electrical kinetic energy. This is wind power generation. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through a speed increaser to prompt the generator to generate electricity. According to current windmill technology, it can start generating electricity at a breeze speed of about three meters per second (the degree of a breeze). Wind power generation is becoming a trend in the world because wind power generation does not require the use of fuel and does not produce radiation or air pollution.

[0003] The hydraulic pitch control system of a wind turbine is composed of a hydraulic pump, a hydraulic motor, a hydraulic cylinder, and a control system. When the wind blades are affected by wind, the hydraulic pump sends hydraulic oil to the hydraulic motor, which drives the hydraulic cylinder through the rotation of the hydraulic motor, thereby changing the angle of the blades. Through the precise adjustment of the control system, the wind turbine blades can always be kept at the optimal angle to obtain the maximum functional conversion efficiency. The hydraulic station of the existing hydraulic pitch control system cannot be placed in the hub to rotate with the blades, and is generally placed in the cabin. Since multiple sets of oil pipes are connected to the outside of the hydraulic station, there is a possibility of oil leakage from the oil pipes and joints during long-term use. Although the hydraulic station also has sensors to monitor the oil pressure to determine whether there is an oil leak, when there is a small amount of oil leakage, the sensors installed on the outside of the hydraulic station cannot accurately monitor it, there is a certain error, and it is not timely. Only when the oil pressure is reduced to a certain level can an alarm be issued. Therefore, a hydraulic pitch control system is proposed to address the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a hydraulic pitch control system to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] As an optional solution of the hydraulic pitch system described in the utility model, a hydraulic pitch system includes a hydraulic station and a connecting oil nozzle,

[0007] The outer side of the hydraulic station is connected to a plurality of connecting oil nozzles;

[0008] A detection component is also installed on the side of the hydraulic station;

[0009] An alarm and a controller are installed on the front side of the hydraulic station;

[0010] The detection component includes an oil receiving hopper, a filter membrane and a connecting pipe. The outer side of the oil receiving hopper is fixedly connected to the hydraulic station. The top of the oil receiving hopper is fixedly connected to the filter membrane. The bottom of the oil receiving hopper is connected to the connecting pipe. The other side of the connecting pipe is connected to a collecting cylinder. An oil level sensor is installed on the top of the collecting cylinder. The outer side of the collecting cylinder is fixedly connected to the hydraulic station.

[0011] As an optional solution of the hydraulic pitch system described in the present invention, a sealing plug is installed at the bottom of the collecting cylinder, and the collecting cylinder is made of a transparent glass plate.

[0012] The hydraulic pitch control system of a wind turbine is composed of a hydraulic pump, a hydraulic motor, a hydraulic cylinder, and a control system. When the wind blades are affected by wind force, the hydraulic pump sends hydraulic oil to the hydraulic motor, which drives the hydraulic cylinder through the rotation of the hydraulic motor, thereby changing the angle of the blades. Through the precise adjustment of the control system, the wind turbine blades can always be kept at the optimal angle to obtain the maximum functional conversion efficiency. The hydraulic station of the existing hydraulic pitch control system cannot be placed in the hub to rotate with the blades, and is generally placed in the cabin. Since multiple groups of oil pipes are connected to the outside of the hydraulic station, there is a possibility of oil leakage from the oil pipes and joints during long-term use. Although the hydraulic station also has sensors to monitor the oil pressure to determine whether there is oil leakage, a small amount of leakage When the oil is leaking, the sensor installed on the outside of the hydraulic station cannot monitor accurately, there is a certain error, and it is not timely. Only when the oil pressure drops to a certain level can an alarm be issued. When this device is used, an external power supply is required. This device is equipped with an oil receiving hopper under the connecting nozzle. When the joint leaks, the set oil receiving hopper can collect the leaked oil and collect it at the bottom of the oil receiving hopper, and flow to the inside of the collection cylinder through the connecting pipe. The oil level sensor can monitor it in time, and the controller can control the alarm to start to remind the staff. This setting can provide timely reminders to avoid continuous waste of resources. At the same time, the set sealing plug can be used to discharge the hydraulic oil inside the collection cylinder to facilitate subsequent recycling.

[0013] As an optional solution of the hydraulic pitch system described in the present invention, the interior of the oil receiving hopper is fixedly connected to a fixed platform, the outside of the oil receiving hopper is also fixedly connected to a mounting frame, an air pump is installed inside the mounting frame, the output end of the air pump is connected to a one-way pipe, the other side of the one-way pipe is connected to an air pressure tank, an air pressure sensor is installed on the outside of the air pressure tank, the other side of the air pressure tank is connected to a main pipe, the other end of the main pipe is connected to a hollow frame, the outside of the hollow frame is connected to evenly distributed dispersion pipes, the other ends of the dispersion pipes are all connected to exhaust nozzles, and the outside of the hollow frame is fixedly connected to the fixed platform.

[0014] As an optional solution of the hydraulic pitch system described in the present invention, a groove is provided on the outer side of the fixed platform, and evenly distributed exhaust nozzles are provided inside the groove.

[0015] As an optional solution of the hydraulic variable pitch system described in the utility model, the exhaust nozzle is arranged at an angle.

[0016] As an optional solution of the hydraulic pitch system described in the present invention, a one-way valve is installed on the outside of the one-way pipe, and a solenoid valve is installed on the outside of the main pipe.

[0017] The oil filter membrane is set above the oil receiving hopper, and the filter membrane can prevent external dust from entering the oil receiving hopper, and the filter membrane can only allow liquid to penetrate into it, so it has filtering properties and realizes targeted collection of oil. During the long-term use of the filter membrane, a layer of dust adheres to the surface of the filter membrane. At this time, the air pump is started to drive air into the pressure tank. When the air pressure inside the pressure tank reaches a certain level, it is detected by the air pressure sensor, and the solenoid valve is controlled by the controller to open. At this time, the gas inside the pressure tank can smoothly enter the main pipe, hollow frame and dispersion pipe, and then be discharged briefly and quickly through the exhaust nozzle. At this time, it can serve the purpose of backwashing the filter membrane and clean the dust on the surface of the filter membrane. A one-way valve is installed on the outside of the one-way pipe. The one-way valve can ensure that the air discharged by the air pump can only enter the interior of the pressure tank in one direction to avoid gas backflow. The exhaust nozzle is tilted, so the filter membrane can be targeted backwashed at this time, and when the oil penetrates and falls on the surface of the filter membrane, it is not easy to fall on the surface of the exhaust nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model is provided with an oil collecting hopper below the connecting oil nozzle. When leakage occurs in the joint, the oil collecting hopper can collect the leaked oil and collect it at the bottom of the oil collecting hopper, and then flow into the collection cylinder through the connecting pipe. The oil level sensor can monitor the oil level in time, and the controller can control the alarm to start to remind the staff. This arrangement can provide timely reminders to avoid continuous waste of resources. At the same time, the sealing plug can be used to discharge the hydraulic oil in the collection cylinder, which is convenient for subsequent recycling.

[0020] An oil filter membrane is installed above the oil receiving hopper. The filter membrane can prevent external dust from entering the oil receiving hopper, and the filter membrane can only allow liquid to penetrate into it, so it has filtering properties and realizes targeted collection of oil.

[0021] During the long-term use of the filter membrane, a layer of dust will adhere to the surface of the filter membrane. At this time, the air pump is started to drive air into the air pressure tank. When the air pressure inside the air pressure tank reaches a certain level, the solenoid valve is controlled by the controller to open. At this time, the gas inside the air pressure tank can smoothly enter the main pipe, hollow frame and dispersion pipe, and then be temporarily discharged through the exhaust nozzle. At this time, the filter membrane can be backwashed to clean the dust on the surface of the filter membrane.

[0022] A one-way valve is installed on the outside of the one-way pipe. The one-way valve can ensure that the air discharged by the air pump can only enter the air pressure tank in one direction to prevent gas backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the detection component of the utility model;

[0025] Figure 3 It is a cross-sectional view of the installation frame of the utility model.

[0026] In the figure: 1. Hydraulic station; 2. Connecting oil nozzle; 3. Detection component; 301. Oil receiving hopper; 302. Filter membrane; 303. Connecting pipe; 304. Collecting cylinder; 305. Oil level sensor; 306. Sealing plug; 307. Fixing platform; 308. Exhaust nozzle; 309. Hollow frame; 310. Dispersion pipe; 311. Main pipe; 312. Mounting frame; 313. Air pump; 314. One-way pipe; 315. One-way valve; 316. Air pressure tank; 317. Air pressure sensor; 318. Solenoid valve; 4. Alarm; 5. Controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0028] Example 1

[0029] See also Figure 1 、 Figure 2 and Figure 3 , the utility model provides a technical solution:

[0030] A hydraulic pitch control system includes a hydraulic station 1 and a connecting nozzle 2.

[0031] The outer side of the hydraulic station 1 is connected to a plurality of connecting nozzles 2;

[0032] A detection component 3 is also installed on the side of the hydraulic station 1;

[0033] An alarm 4 and a controller 5 are installed on the front side of the hydraulic station 1;

[0034] The above-mentioned detection component 3 includes an oil receiving hopper 301, a filter membrane 302 and a connecting pipe 303. The outer side of the above-mentioned oil receiving hopper 301 is fixedly connected to the hydraulic station 1, and the top of the above-mentioned oil receiving hopper 301 is fixedly connected with the filter membrane 302. The bottom of the above-mentioned oil receiving hopper 301 is connected with the connecting pipe 303. The other side of the above-mentioned connecting pipe 303 is connected with a collecting cylinder 304. The top of the above-mentioned collecting cylinder 304 is equipped with an oil level sensor 305. The outer side of the above-mentioned collecting cylinder 304 is fixedly connected to the hydraulic station 1.

[0035] A sealing plug 306 is installed at the bottom of the collecting tube 304 , and the collecting tube 304 is made of a transparent glass plate.

[0036] The hydraulic pitch control system of a wind turbine is composed of a hydraulic pump, a hydraulic motor, a hydraulic cylinder, and a control system. When the wind blades are affected by wind force, the hydraulic pump sends hydraulic oil to the hydraulic motor, which drives the hydraulic cylinder through the rotation of the hydraulic motor, thereby changing the angle of the blades. Through the precise adjustment of the control system, the wind turbine blades can always be kept at the optimal angle to obtain the maximum functional conversion efficiency. The hydraulic station of the existing hydraulic pitch control system cannot be placed in the hub to rotate with the blades, and is generally placed in the cabin. Since multiple groups of oil pipes are connected to the outside of the hydraulic station, there is a possibility of oil leakage from the oil pipes and joints during long-term use. Although the hydraulic station also has sensors to monitor the oil pressure to determine whether there is oil leakage, when there is a small amount of oil leakage, the sensors installed on the outside of the hydraulic station are not The device cannot monitor accurately, there are certain errors, and it is not timely. It can only warn when the oil pressure drops to a certain level. When this device is used, an external power supply is required. This device is provided with an oil receiving bucket 301 below the connecting nozzle 2. When a leak occurs in the joint, the set oil receiving bucket 301 can collect the leaked oil and gather it to the bottom of the oil receiving bucket 301, and flow to the inside of the collecting cylinder 304 through the connecting pipe 303. The oil level sensor 305 can be used for timely monitoring, and the controller 5 can be used to control the alarm 4 to start, which is used to remind the staff. This setting can provide timely reminders to avoid continuous waste of resources. At the same time, the set sealing plug 306 can be used to discharge the hydraulic oil inside the collecting cylinder 304, which is convenient for subsequent recycling.

[0037] Example 2

[0038] This embodiment is an improvement on embodiment 1. Figure 1Specifically, the interior of the oil receiving hopper 301 is fixedly connected to a fixed platform 307, and the outside of the oil receiving hopper 301 is also fixedly connected to a mounting frame 312, an air pump 313 is installed inside the mounting frame 312, the output end of the air pump 313 is connected to a one-way pipe 314, the other side of the one-way pipe 314 is connected to an air pressure tank 316, an air pressure sensor 317 is installed on the outside of the air pressure tank 316, the other side of the air pressure tank 316 is connected to a main pipe 311, the other end of the main pipe 311 is connected to a hollow frame 309, the outside of the hollow frame 309 is connected to evenly distributed dispersion pipes 310, the other ends of the dispersion pipes 310 are all connected to exhaust nozzles 308, and the outside of the hollow frame 309 is fixedly connected to the fixed platform 307.

[0039] A groove is formed on the outer side of the fixing platform 307 , and evenly distributed exhaust nozzles 308 are provided inside the groove.

[0040] The exhaust nozzle 308 is arranged at an angle.

[0041] A one-way valve 315 is installed on the outside of the one-way pipe 314 , and a solenoid valve 318 is installed on the outside of the main pipe 311 .

[0042] An oil filter membrane 302 is provided above the oil receiving hopper 301. The filter membrane 302 can prevent external dust from entering the oil receiving hopper 301, and the filter membrane 302 can only allow liquid to penetrate into it, so it has filtering properties and realizes targeted collection of oil. During the long-term use of the filter membrane 302, a layer of dust adheres to the surface of the filter membrane 302. At this time, the air pump 313 is started to drive air into the air pressure tank 316. When the air pressure inside the air pressure tank 316 reaches a certain level, it is detected by the air pressure sensor 317, and the solenoid valve 318 is controlled by the controller 5 to open. At this time, the gas inside the air pressure tank 316 can be smoothly discharged. It enters the main pipe 311, the hollow frame 309 and the dispersion pipe 310, and then is discharged briefly and quickly through the exhaust nozzle 308. At this time, the filter membrane 302 can be backwashed to clean the dust on the surface of the filter membrane 302. A one-way valve 315 is installed on the outside of the one-way tube 314. The one-way valve 315 can ensure that the air discharged by the air pump 313 can only enter the inside of the air pressure tank 316 in one direction to avoid gas backflow. The exhaust nozzle 308 is set at an angle. At this time, the filter membrane 302 can be backwashed in a targeted manner, and when the oil penetrates and falls on the surface of the filter membrane 302, it is not easy to fall on the surface of the exhaust nozzle 308.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pitch control system, characterized by: It includes a hydraulic station (1) and a connecting nozzle (2), The outer side of the hydraulic station (1) is connected to a plurality of connecting oil nozzles (2); A detection component (3) is also installed on the side of the hydraulic station (1); An alarm (4) and a controller (5) are installed on the front side of the hydraulic station (1); The detection assembly (3) comprises an oil receiving hopper (301), a filter membrane (302) and a connecting pipe (303); the outer side of the oil receiving hopper (301) is fixedly connected to the hydraulic station (1); the top of the oil receiving hopper (301) is fixedly connected to the filter membrane (302); the bottom of the oil receiving hopper (301) is connected to the connecting pipe (303); the other side of the connecting pipe (303) is connected to a collecting cylinder (304); an oil level sensor (305) is installed on the top of the collecting cylinder (304); and the outer side of the collecting cylinder (304) is fixedly connected to the hydraulic station (1).

2. A hydraulic pitch control system according to claim 1, characterized in that: A sealing plug (306) is installed at the bottom of the collecting cylinder (304), and the collecting cylinder (304) is made of a transparent glass plate.

3. The hydraulic pitch control system according to claim 1, characterized in that: The interior of the oil receiving hopper (301) is fixedly connected to a fixed platform (307), and the exterior of the oil receiving hopper (301) is also fixedly connected to a mounting frame (312). An air pump (313) is mounted inside the mounting frame (312). The output end of the air pump (313) is connected to a one-way pipe (314), and the other side of the one-way pipe (314) is connected to an air pressure tank (316). An air pressure sensor (317) is mounted on the exterior of the air pressure tank (316). The other side of the air pressure tank (316) is connected to a main pipe (311), and the other end of the main pipe (311) is connected to a hollow frame (309). The exterior of the hollow frame (309) is connected to evenly distributed dispersion pipes (310), and the other ends of the dispersion pipes (310) are all connected to exhaust nozzles (308). The exterior of the hollow frame (309) is fixedly connected to the fixed platform (307).

4. The hydraulic pitch control system according to claim 3, characterized in that: A groove is provided on the outer side of the fixing platform (307), and evenly distributed exhaust nozzles (308) are provided inside the groove.

5. The hydraulic pitch control system according to claim 4, characterized in that: The exhaust nozzle (308) is arranged in an inclined manner.

6. The hydraulic pitch control system according to claim 3, characterized in that: A one-way valve (315) is installed on the outside of the one-way pipe (314), and a solenoid valve (318) is installed on the outside of the main pipe (311).

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