CN203965149U - A kind of multidirectional alternate load simulation test device of wind-powered electricity generation kinematic train - Google Patents

Abstract

A multi-directional alternating load simulation test device for a wind power transmission system, the device includes six controllable telescopic actuating arms installed on the foundation platform in two groups of three, and the two groups actuate The two ends of the arm are fixedly connected with the support fixed on the foundation frame and the front bearing seat and the rear bearing seat of the main shaft in the form of spherical hinge respectively; one end of the main transmission shaft is connected with the main motor that provides the main torque, and the other end is connected with the test shaft. It is connected with a speed-up gearbox, and also includes a central control unit connected with the main motor and six actuating arms. The input simulated load includes two independent parts: the main torque and the main rotation and non-torsion load. After the simulated load is input into the central control unit , which sends commands to execute movement and force to the main motor and the six actuating arms respectively, so as to realize the simulated loading of multi-directional alternating loads of the wind power transmission system; relatively complete simulation of the actual high-altitude installed wind power generation equipment transmission chain Torsional, impact, and bending loads.

Description

A multi-directional alternating load simulation test device for wind power transmission system

technical field

The utility model relates to the technical field of wind power generation equipment transmission systems, in particular to a multi-directional alternating load simulation test device for wind power transmission systems. the

Background technique

In order to deeply study the influence mechanism of the structural design and manufacturing parameters of the key components of the wind power transmission chain on its reliability, it is necessary to carry out experimental research on the performance of the wind power transmission chain under complex load conditions. Due to the particularity of the installation and operation of wind power generation equipment, it is very difficult to carry out the operation test of the wind power transmission system under real working conditions in the high-altitude field. Therefore, the laboratory-level wind power transmission chain simulation test is the main technical means of the current scientific research on the transmission chain. The design and manufacturing technology of transmission chain components has an irreplaceable role. The greatest particularity of the wind load lies in its irregular alternation characteristics. Therefore, the damage and fatigue evolution process of key transmission components under alternating wind loads and the development law of structural failure all have outstanding particularities. However, most of the commonly used wind power transmission chain simulation experiment devices can only load the main torsional load, and cannot simulate various types and multi-directional loads other than the main torque—including the axial impact of the impeller on the transmission chain under the action of wind load, and The particularly prominent horizontal and vertical bending moments in the process of yaw and pitch are far from meeting the requirements of in-depth design and manufacturing and scientific research on structural performance, which greatly limits the experimental research and development of wind power transmission systems. The accuracy and usability of the relevant research results. Therefore, the design and development of a test device that can realize multi-directional alternating wind load simulation has extremely important scientific significance for the reliability research of wind power transmission chain and the research of design and manufacturing technology. the

Contents of the invention

In order to overcome the problems existing in the above-mentioned prior art, the purpose of this utility model is to provide a multi-directional alternating load simulation test device for a wind power transmission system, which works in coordination with the main motor that provides the main torsional moment, and can perform torsion, impact, The loading of the bending load enables the test device of the utility model to more realistically simulate the multi-directional alternating loads borne by the drive chain of the wind power generation equipment installed at high altitude. Therefore, it provides key tools for the principle test research of the wind power transmission system, the component load, kinematics and dynamic characteristics research on the wind power transmission chain, and the reliability research of the transmission chain. Technical research work such as manufacturing process provides more accurate and reliable experimental basis. the

In order to achieve the above object, the technical solution adopted in the utility model is:

A multi-directional alternating load simulation test device for a wind power transmission system, including six controllable telescopic actuating arms 3 installed on a base frame 1 in two groups of three, the two groups One end of the actuating arm 3 is respectively connected to the support 2 fixed on the base frame 1 in a spherical hinged manner, and the other end is also fixedly connected to the front bearing seat 4 and the rear bearing seat 6 of the main shaft in a spherical hinged manner. The two ends of the transmission shaft 5 are respectively fixed on the front bearing housing 4 and the rear bearing housing 6 through bearings, and one end of the main transmission shaft 5 is connected to the main motor that provides the main torque for the multi-directional alternating load simulation test device. The shaft joint is connected, and the other end is directly connected with the speed-up gearbox for the test. It also includes a central control unit 7 connected with the main motor providing the main torque and the six actuating arms 3. The input simulated load includes the main torque and the main rotation and Two independent parts of the non-torsion load. After the simulated load is input to the central control unit 7, the central control unit 7 sends instructions for executing motion and force to the main motor and the six actuating arms 3, so as to realize the multi-directional wind power transmission system. Simulated loading of alternating loads. the

The central control unit 7 is composed of a central control computer, a central hydraulic pump station and corresponding sensing, communication and control systems. the

The main motor is equipped with a reduction device to meet the requirements of simulating low speed and high torque wind load. the

The rotational speed input by the main electric motor to the main transmission shaft 5 is in the range of 10-25 rpm. the

Compared with the prior art, the beneficial effect of the utility model is that the non-torque load simulation loading device of the utility model is a multi-degree-of-freedom motion mechanism, which is installed on the main transmission shaft of the wind power transmission chain and coordinates with the main motor, which can Carry out simulated loading of multi-directional alternating loads. The wind power transmission chain operation simulation test bench can more realistically simulate the multi-directional alternating loads borne by the wind power generation equipment transmission chain installed at high altitude. Provide more accurate and reliable experimental basis for the principle test, structural design and manufacturing process of wind power transmission system. the

In a word, the device of the utility model can greatly enhance the load simulation capability of the wind power transmission chain operation simulation test bench, and provide more realistic multi-directional alternating wind loads to the transmission chain. It is a great impetus to the in-depth research on wind power transmission chain simulation experiments. the

Description of drawings

Fig. 1 is the specific structure schematic diagram of the simulation test device of the embodiment of the utility model. the

Fig. 2 is a structural schematic diagram of a wind power transmission system operation simulation test bench installed with a simulation test device according to an embodiment of the utility model. the

Fig. 3 is a schematic diagram of the superposition analysis of the forces on the six actuating arms based on the action principle of the space converging force system. the

Figure 4a, Figure 4b, and Figure 4c show that the forces on both ends of the main shaft (A, B) are synthesized into axial load (Figure 4a), bending moment on the horizontal plane (Figure 4b) and bending moment on the vertical plane ( Schematic diagram of Figure 4c). the

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment. the

As shown in Fig. 1 and Fig. 2, a multi-directional alternating load simulation test device of a wind power transmission system of the present invention includes six acceptable Control telescopic actuating arms 3, one end of the two groups of actuating arms 3 is respectively connected to the support 2 fixed on the base frame 1 in a spherical hinged manner, and the other end is also connected to the front of the main shaft in a spherical hinged manner. The bearing seat 4 and the rear bearing seat 6 are fixedly connected, and the two ends of the main transmission shaft 5 are respectively fixed on the front bearing seat 4 and the rear bearing seat 6 through bearings, and one end of the main transmission shaft 5 is connected to the multidirectional alternating The main motor that provides the main torque of the load simulation test device is connected through a coupling, and the other end is directly connected to the speed-up gearbox for the test. It also includes a central control unit 7 connected to the main motor that provides the main torque and the six actuating arms 3 , the input simulated load includes two independent parts of main torque and main rotation and non-torsion load. After the simulated load is input to the central control unit 7, the central control unit 7 sends the execution motion and action to the main motor and the six actuating arms 3 respectively. Force command to realize the simulated loading of the multi-directional alternating load of the wind power transmission system. the

As a preferred embodiment of the present invention, the central control unit 7 is composed of a central control computer, a central hydraulic pump station and corresponding sensing, communication and control systems. the

As a preferred embodiment of the present utility model, the main motor is provided with a reduction device to meet the requirement of simulating low-speed, high-torque wind load. the

As a preferred embodiment of the present invention, the rotation speed input by the main motor to the main drive shaft 5 is in the range of 10-25 rpm. the

The method for simulating loading of the wind power transmission system by the multi-directional alternating load simulation test device of the wind power transmission system described above comprises the following steps:

Step 1: The load data used for wind power transmission system operation simulation is divided into two independent parts: ① main torque and main rotation, ② non-torsional loads, in which non-torsional loads mainly include axial loads, bending moments on the horizontal plane and vertical loads surface bending moment;

Step 2: The above input load data are specifically represented as: the torque-time curve of the main torque, the angular velocity-time curve of the main rotation, the force-time curve of the axial load, the moment-time curve of the bending moment on the horizontal plane and the vertical plane The torque-time curve of the bending moment is input to the central control unit 7, and the central control unit 7 sends commands to execute motion and force to the main motor and the six actuating arms 3 respectively;

Step 3: The torque-time curve of the main torque and the angular velocity-time curve of the main rotation are respectively sent and executed by the central control unit 7 to the main motor;

Step 4: In the non-torsion load part, the force-time curve of the axial load, the moment-time curve of the bending moment on the horizontal plane and the moment-time curve of the bending moment on the vertical plane are made to two groups of six through the central control unit 7 The boom 3 is executed in the form of sending force-time curves respectively; in specific execution, according to the law of action of the theoretical mechanical space intersection force system, the input load is decomposed into two groups of forces that should be loaded on the six telescopic booms, and then added implement. The embodiment shown in Figure 3 reflects the superimposed action between the forces of the three telescopic actuating arms at one end of the main shaft: the actuating arm 1 _arm is located in the vertical plane along the axial direction, while the other two actuating arms 2 _arm and The 3 _arm is symmetrically distributed in the vertical plane along the end face; the force of the actuating arm 1 _arm can be decomposed into the component F _1y in the direction of the Y axis and the component F _1z in the direction of the Z axis, and F _1y can be further decomposed into the component of the actuating arm 2 The directions of the acting forces F ₂ and F ₃ of _arm and 3 _arm go up to become F _1y-2 and F _1y-3 , and can be directly synthesized with F ₂ and F ₃ ; therefore, by rationally configuring the three actuating arms 1 _arm , 2 _arm and 3 _arm on the size of the force F ₁ , F ₂ and F ₃ , a resultant force F _A can be superimposed on the A end of the main shaft; similarly, three actions can also be configured on the B end of the main shaft The force of the arm superimposes a resultant force F _B ; while the non-torsional load on the main shaft, such as axial load, bending moment on the horizontal plane and bending moment on the vertical plane, can be realized through the combined action of F _A and F _B —as shown in the figure 4, 1) is the combined axial load, 2) is the combined horizontal bending moment, and 3) is the combined vertical bending moment;

Step 5: The superposition of the main torsional moment loaded by the main motor and the non-torsional loads performed by two groups of six actuating arms 3 is reflected in the simulated multi-directional alternating wind load borne by the wind power transmission system via the main shaft. the

Claims (4)

1. A multi-directional alternating load simulation test device of a wind power transmission system, characterized in that: it comprises six controllable telescopic working devices installed in two groups of three in each group on the base frame (1). The moving arm (3), one end of the two groups of moving arms (3) are respectively connected to the support (2) fixed on the base frame (1) in a spherical hinged manner, and the other ends are also respectively connected in a spherical hinged manner It is fixedly connected with the front bearing seat (4) and the rear bearing seat (6) of the main shaft, and the two ends of the main transmission shaft (5) are respectively fixed on the front bearing seat (4) and the rear bearing seat (6) through bearings. One end of the main transmission shaft (5) is connected with the main motor that provides the main torque for the multi-directional alternating load simulation test device through a coupling, and the other end is directly connected with the speed-up gearbox for the test, and also includes the main motor that provides the main torque. The main motor and the central control unit (7) connected to the six actuating arms (3), the input simulated load includes two independent parts of the main torque and the main rotation and non-torsion load, after the simulated load is input into the central control unit (7) , the central control unit (7) sends commands to execute movement and force to the main motor and the six actuating arms (3), so as to realize the simulated loading of multi-directional alternating loads of the wind power transmission system. 2. The multi-directional alternating load simulation test device of a wind power transmission system according to claim 1, characterized in that: the central control unit (7) consists of a central control computer, a central hydraulic pump station and corresponding transmission Sensing, communication and control systems. 3. A multi-directional alternating load simulation test device for a wind power transmission system according to claim 1, characterized in that: the main motor is equipped with a reduction device to meet the requirements of simulating low-speed, high-torque wind load. 4. A multi-directional alternating load simulation test device for a wind power transmission system according to claim 1, characterized in that: the speed input by the main motor to the main transmission shaft (5) is in the range of 10 to 25 rpm Inside.