Variable pitch control system and device for pump station installed in hub

Abstract

The utility model relates to a variable pitch control system and device for a pump station installed in a hub. The variable pitch control system comprises a main pump body A and an auxiliary pump body B which are arranged in the rotating hub. The main pump body A is hydraulically connected with an oil source through an oil inlet pipeline and is hydraulically connected with a variable propeller driving piece of the blade propeller through a main oil path; the main pump body A and the auxiliary pump body B are connected in parallel or independently arranged between the oil source and the variable-pitch driving part. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to a variable pitch control system and a device of a pump station installed in a wheel hub. Background Art

[0002] Most hydraulic pitch systems use traditional hydraulic stations. Due to limited installation space, some use one pump for oil supply. When the pump station fails, the entire system cannot operate. Some install the pump station in the engine room, resulting in pressure loss and oil leakage at the oil sliding ring. Now the supporting circuit host is in the engine room, while the signal collection end and the execution end are in the hub. The host is electrically connected to the front end through a collector ring (conductive ring). The stator and rotor generate electrical signals during power generation, which interfere with the electrical signals between the collection end and the host, resulting in errors.

[0003] In the system, stable pressure is very important. The applicant found that when the pressure or displacement of the pump body is unstable, it is easy to cause fluid circuit fluctuations, resulting in micro-movement of the impeller, thereby affecting the stability of the equipment and easily causing bubble hazards in the hydraulic system. Utility Model Content

[0004] In view of the above problems, this system uses a single or multiple drivers to drive a single or multiple pumps, and merges the pipeline hydraulic pressure to provide power energy for the system, solving the problems of insufficient power and mutual backup to ensure safe operation. At the same time, the system can be installed in the hub of the wind turbine to effectively solve the problems of slip ring oil leakage, signal interference, etc. The technical problem to be solved by the utility model is generally to provide a variable pitch control system and device for a pump station installed in the hub.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] In order to prevent the problem of main pump damage or insufficient oil supply, the utility model provides a variable pitch control system in which a pump station is installed in a hub, comprising a main pump body A and an auxiliary pump body B arranged in a rotating hub;

[0007] The main pump body A is hydraulically connected to the oil source through the oil inlet pipeline and is hydraulically connected to the variable pitch drive member of the blade propeller through the main oil circuit;

[0008] The main pump body A and the auxiliary pump body B are connected in parallel or independently arranged between the oil source and the pitch drive member.

[0009] As a further improvement of the above technical solution:

[0010] In order to avoid interference or data loss in the transmission of the conductive ring and shorten the data transmission distance, the main pump body A and the auxiliary pump body B are equipped with a circuit control module; the circuit control module is located in the wheel hub;

[0011] The circuit control module includes a main motor A drivingly connected to the main pump body A, an auxiliary motor B drivingly connected to the auxiliary pump body B, a main pump driver A electrically connected to the main motor A, and an auxiliary pump driver B electrically connected to the auxiliary motor B;

[0012] A sensor assembly A is arranged on the inlet side of the main pump body A, inside the pump body and / or on the outlet side;

[0013] The sensor assembly A is electrically connected to the main pump driver A and / or the auxiliary pump driver B.

[0014] In order to realize direct data transmission, the main pump driver A is directly electrically connected to the auxiliary pump driver B. Of course, the transmission control can also be realized through the host computer.

[0015] The main pump driver A and the auxiliary pump driver B transmit communication data, analog quantity and / or detection signal.

[0016] A sensor assembly B is arranged on the inlet side of the auxiliary pump body B, inside the pump body and / or on the outlet side.

[0017] In order to realize the setting of the preset data instruction, the main pump driver A and / or the auxiliary pump driver B are electrically connected to the controller PLC; the controller PLC transmits the pressure instruction and / or the flow instruction to the main pump driver A and / or the auxiliary pump driver B.

[0018] In order to prevent interference with the auxiliary pipeline during normal operation, a one-way valve is provided on the outlet side of the auxiliary pump body B.

[0019] In order to realize signal acquisition, the sensor component adopts a pressure sensor and / or a flow sensor.

[0020] As a limitation of the dynamic technical characteristics, when the main pump body A is in a working state where the flow rate and / or pressure supplied is lower than the set threshold, the auxiliary pump body B is in a working state, and the oil enters the main oil circuit through the auxiliary pump body B;

[0021] When the flow rate and / or pressure supplied by the main pump body A meets the set threshold working state, the auxiliary pump body B is in a stopped state, an idling state or a unloading working state.

[0022] As an extended protection, a device includes a nacelle and a hub connected to the nacelle; the above-mentioned pitch control system is installed in the hub;

[0023] A blade propeller is arranged on the hub.

[0024] As a preferred protection, the device is a wind turbine.

[0025] The utility model realizes multi-pump confluence by effectively combining and providing more power sources through modular hydraulic pump stations in the wheel hub; multiple motor drivers and motor pumps serve as backup for each other to ensure safe operation of the system; and load distribution of multiple motor drivers and motor pumps effectively prolongs the service life of the system.

[0026] The utility model system sends analog quantity or communication control word instructions to the motor driver through the controller PCL (it can also be a processor such as MCU), driving the motor with the hydraulic pump to establish oil pressure. The driver detects the actual outlet oil pressure through the pressure sensor to control the motor output speed in a closed loop. The motor drivers can stand by each other through communication detection (motor driver status word fault bit). The controller can distribute the speed of each motor driver through communication and dynamically adjust the load.

[0027] The utility model realizes backup redundancy, can supplement or replace the main pump, ensures reliable and stable operation of the system, is safe and reliable, solves the oil leakage problem, realizes mutual inspection of the drivers through detection signals, ensures the normal operation of the drivers, and the backup pump is in an unloading state to ensure that when the backup pump is started, the hydraulic system is stable to avoid vacuum or air entering. When the one-way valve fails or has a sealing defect, the possible pressure drop of the liquid pressure at the moment of starting is avoided. Through the coordination of multiple pumps and drivers, load sharing is realized. Compared with the traditional design, the utility model sets the circuit control system in the rotating wheel hub. Compared with the traditional setting in the cabin, it avoids data loss, failure or interference and simplifies the circuit.

[0028] Reasonable design, low cost, strong and durable, simple operation, saving time and effort, saving money, compact structure and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a control schematic diagram of the utility model.

[0030] Among them: 1. Controller PLC; 2-1. Main pump driver A; 2-2. Auxiliary pump driver B; 3-1. Main pump body A; 3-2. Auxiliary pump body B; 4-1. Main motor A; 4-2. Auxiliary motor B; 5-1. Sensor component A; 5-2. Sensor component B; 6. Oil inlet pipeline; 7. Main oil circuit; 8. One-way valve; DETAILED DESCRIPTION

[0031] like Figure 1As shown, the pump station of this embodiment is installed in the variable pitch control system and device in the wheel hub, wherein the pump station of this embodiment is installed in the variable pitch control system in the wheel hub, including a main pump body A3-1 and an auxiliary pump body B3-2 arranged in the rotating wheel hub; its supporting applicant's series products install the pump station system in the wheel hub. Of course, the bubbles in the hydraulic pipeline are discharged or prevented from entering the hydraulic pipeline by supporting components such as positive pressure oil tanks or exhaust valves, which is not the focus of the present utility model.

[0032] As an introduction to the main structure, the main pump body A3-1 is hydraulically connected to the oil source through the oil inlet pipeline 6 and is hydraulically connected to the variable pitch drive of the blade through the main oil circuit 7, thereby realizing oil replenishment or oil circuit circulation; the oil source can be an oil tank and / or accumulator or other components that store oil or similar components.

[0033] The main pump body A3-1 and the auxiliary pump body B3-2 are connected in parallel or independently arranged between the oil source and the pitch drive, so as to avoid the problem that the system cannot work due to insufficient capacity or failure of the main pump. Figure 1 For parallel arrangement, of course, as a protection extension, if a separate pipeline is connected to drive the pitch drive, it is also within the protection scope. Here is an explanation of the components related to the utility model, such as the reversing valve, etc. Although the components are not mentioned, they exist.

[0034] As an improvement, the main pump body A3-1 and the auxiliary pump body B3-2 are equipped with a circuit control module to realize the electronically controlled drive start and stop or speed control;

[0035] As a basic power connection, the circuit control module includes a main motor A4-1 transmission-connected to the main pump body A3-1, an auxiliary motor B4-2 transmission-connected to the auxiliary pump body B3-2, a main pump driver A2-1 electrically connected to the main motor A4-1, and an auxiliary pump driver B2-2 electrically connected to the auxiliary motor B4-2; as protection points, they can all be integrated in the wheel hub, thereby shortening the electrical signal transmission distance and reducing signal interference.

[0036] As a protection, a sensor assembly A5-1 is arranged on the inlet side, inside the pump body and / or the outlet side of the main pump body A3-1; in practice, it is preferred to arrange a sensor at the outlet.

[0037] The sensor assembly A5-1 is electrically connected to the main pump driver A2-1 and / or the auxiliary pump driver B2-2. The following description takes the pressure sensor as an example, but it is not a restriction that other sensors cannot be reasonably used. The main sensor sends a signal to the auxiliary pump driver B2-2. The auxiliary pump driver B2-2 directly compares the input signal with the preset signal to control the start of the auxiliary pump body. It can be hardware control, and the level comparison is realized by the comparator, which has a fast response. It can also be converted into data, and the data signal is compared to achieve the pump body matching the corresponding speed, which is within the protection range.

[0038] It can also be Figure 1 , the main pump driver A2-1 is electrically connected to the auxiliary pump driver B2-2;

[0039] The main pump driver A2-1 and the auxiliary pump driver B2-2 transmit communication data, analog quantity and / or detection signal to achieve precise control. Of course, the detection signal can be a heartbeat signal such as a pulse signal, and other forms of detection control and feedback can also be used to realize mutual detection of the driver. The main and auxiliary drivers are set to connect the main pump and the auxiliary pump respectively at the same time, and the driver priority setting is also within the protection range.

[0040] A sensor assembly B5-2 is disposed on the inlet side, inside the pump body and / or outlet side of the auxiliary pump body B3-2, preferably at the outlet. For multi-channel auxiliary pumps, each pump body can be adjusted through the feedback parameters of the sensor.

[0041] As an improvement, the main pump driver A2-1 and / or the auxiliary pump driver B2-2 are electrically connected to the controller PLC1; the controller PLC1 transmits pressure instructions and / or flow instructions to the main pump driver A2-1 and / or the auxiliary pump driver B2-2, thereby preset the flow instructions and / or pressure instructions as a benchmark to compare the preset parameters of the actual parameters.

[0042] A one-way valve 8 is provided on the outlet side of the auxiliary pump body B3-2 to prevent backflow and avoid mutual influence between the pump bodies.

[0043] By way of example, the sensor assembly A5-1 employs a pressure sensor and / or a flow sensor.

[0044] As a working state definition, when the main pump body A3-1 is in a working state where the flow rate and / or pressure supplied is lower than a set threshold, the auxiliary pump body B3-2 is in a working state, and the oil enters the main oil circuit 7 through the auxiliary pump body B3-2;

[0045] When the flow rate and / or pressure supplied by the main pump body A3-1 meets the set threshold working state, the auxiliary pump body B3-2 is in a stopped state, an idling state or an unloading working state. Figure 1 It is a schematic diagram. In actual work, the pump body can be a low-pressure unloading rotation, so that when it needs to work, it can quickly cut into the main oil circuit. Regarding the unloading oil circuit, it can be a conventional unloading hydraulic oil circuit, on which a reversing valve, an unloading valve, etc. can be set to avoid mixing with air or generating a vacuum, thereby reducing starting losses.

[0046] like Figure 1 The device of this embodiment includes a nacelle and a hub connected to the nacelle; the above-mentioned variable pitch control system is installed in the hub; and blades are arranged on the hub. The device is a wind turbine.

[0047] The electrical modules used can be conventional parts, for example, the controller PLC is Siemens S7-1200; the motor driver is Orei-50ASD10-Z; the hydraulic pump is Rexroth 19cc; the motor is a permanent magnet synchronous 17kW motor; and the sensor assembly is a 0-400Bar sensor assembly PT5501.

[0048] As a preferred working principle, first, the controller PLC1 issues preset instructions to the main pump driver A2-1 and the auxiliary pump driver B2-2. The instructions can be pressure instructions and / or flow instructions as reference values. During normal operation, the main pump body A3-1 is started by the main motor A4-1, and the collected pressure signal and / or flow signal is fed back to the main pump driver A2-1 through the sensor component A5-1. After comparison and judgment, if the auxiliary pump body needs to be started, the data is transmitted to the auxiliary pump driver B2-2. The auxiliary pump driver B2-2 starts the required number of auxiliary pump bodies B3-2 through the auxiliary motor B4-2 according to the instructions, and realizes monitoring and information feedback through the sensor component B5-2, so that the accumulator or / tank supplies oil to the main oil circuit 7 through the oil inlet pipeline 6, thereby driving the variable pitch cylinder action.

[0049] The present invention is fully described for a clearer disclosure, and the prior art will not be listed one by one.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the utility model. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A variable pitch control system in which a pump station is installed in a wheel hub, characterized in that: It comprises a main pump body A (3-1) and an auxiliary pump body B (3-2) arranged in a rotating wheel hub; The main pump body A (3-1) is hydraulically connected to an oil source via an oil inlet pipeline (6) and is hydraulically connected to a variable pitch drive component of a blade propeller via a main oil circuit (7); The main pump body A (3-1) and the auxiliary pump body B (3-2) are connected in parallel or independently arranged between the oil source and the pitch drive member.

2. The variable pitch control system of the pump station installed in the hub according to claim 1, characterized in that: The main pump body A (3-1) and the auxiliary pump body B (3-2) are equipped with a circuit control module; The circuit control module comprises a main motor A (4-1) drivingly connected to the main pump body A (3-1), an auxiliary motor B (4-2) drivingly connected to the auxiliary pump body B (3-2), a main pump driver A (2-1) electrically connected to the main motor A (4-1), and an auxiliary pump driver B (2-2) electrically connected to the auxiliary motor B (4-2); A sensor assembly A (5-1) is arranged on the inlet side, inside the pump body and / or the outlet side of the main pump body A (3-1); The sensor assembly A (5-1) is electrically connected to the main pump driver A (2-1) and / or the auxiliary pump driver B (2-2); The main pump driver A (2-1), the auxiliary pump driver B (2-2) and the sensor assembly A (5-1) are in the wheel hub.

3. The variable pitch control system of the pump station installed in the hub according to claim 2, characterized in that: The main pump driver A (2-1) is electrically connected to the auxiliary pump driver B (2-2); Communication data, analog quantities and / or detection signals are transmitted between the main pump driver A (2-1) and the auxiliary pump driver B (2-2).

4. The variable pitch control system of the pump station installed in the hub according to claim 3 is characterized by: A sensor assembly B (5-2) is arranged on the inlet side, inside the pump body and / or the outlet side of the auxiliary pump body B (3-2).

5. The variable pitch control system of the pump station installed in the hub according to claim 3, characterized in that: The main pump driver A (2-1) and / or the auxiliary pump driver B (2-2) are electrically connected to a controller PLC (1); the controller PLC (1) transmits a pressure instruction and / or a flow instruction to the main pump driver A (2-1) and / or the auxiliary pump driver B (2-2); The controller PLC (1) is in the wheel hub.

6. The variable pitch control system of the pump station installed in the hub according to claim 3, characterized in that: A one-way valve (8) is provided on the outlet side of the auxiliary pump body B (3-2).

7. The variable pitch control system of the pump station installed in the hub according to claim 3, characterized in that: The sensor assembly A (5-1) uses a pressure sensor and / or a flow sensor.

8. The variable pitch control system of the pump station installed in the hub according to claim 3, characterized in that: When the main pump body A (3-1) is in a working state where the flow rate and / or pressure supplied is lower than a set threshold, the auxiliary pump body B (3-2) is in a working state, and the oil enters the main oil circuit (7) through the auxiliary pump body B (3-2); When the flow rate and / or pressure supplied by the main pump body A (3-1) meets the set threshold working state, the auxiliary pump body B (3-2) is in a stopped state, an idling state or a unloading working state.

9. A device, characterized in that: It comprises a nacelle and a hub connected to the nacelle; the pitch control system according to any one of claims 1 to 8 is installed in the hub; A blade propeller is arranged on the hub.

10. The device according to claim 9, characterized in that: The device is a wind turbine.

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