阅读说明：本技术 一种基于轨道车辆垂向振动激励的能量回收装置与方法 (Energy recovery device and method based on rail vehicle vertical vibration excitation ) 是由 左建勇 余杰 于 2020-06-30 设计创作，主要内容包括：一种基于轨道车辆垂向振动激励的能量回收装置,包括以下部件：滚珠丝杆及螺母,在受到转向架侧架与摇枕之间的振动激励作用时,能将螺母线性的往复运动转变为滚珠丝杆的旋转作用；导向用直线导轨,直线导轨与螺母之间通过螺栓连接,用于抵消螺母在运动时与滚珠丝杆相互作用造成的扭矩；传动轴,传动轴与滚珠丝杆之间采用键连接,与滚珠丝杆同步转动。其使用方法,铁路车辆在运行时,转向架侧架与摇枕之间在垂向上发生随机的相对位移变化,经过所述能量回收装置的传动,永磁电机轴与输出轴同步做高速旋转运动,电机转子在受到外界驱动条件下切割定子磁感线,从而在定子上感应出电能。本发明使得车载监控设备能够在铁路货车上使用成为可能。(An energy recovery device based on vertical vibration excitation of a railway vehicle comprises the following components: the ball screw and the nut can convert the linear reciprocating motion of the nut into the rotating action of the ball screw when the ball screw and the nut are subjected to the vibration excitation action between the side frame of the bogie and the swing bolster; the linear guide rail is connected with the nut through a bolt and used for offsetting torque caused by interaction between the nut and the ball screw when the nut moves; the transmission shaft is connected with the ball screw through a key and synchronously rotates with the ball screw. When the railway vehicle runs, random relative displacement changes occur between the side frame of the bogie and the swing bolster in the vertical direction, the permanent magnet motor shaft and the output shaft synchronously rotate at high speed through the transmission of the energy recovery device, and the motor rotor cuts the magnetic induction lines of the stator under the external driving condition, so that electric energy is induced on the stator. The invention makes it possible for the vehicle-mounted monitoring device to be used on rail wagons.)

1. An energy recovery device based on vertical vibration excitation of a railway vehicle is characterized by comprising the following components:

the ball screw and the nut can convert the linear reciprocating motion of the nut into the rotating action of the ball screw when the ball screw and the nut are subjected to the vibration excitation action between the side frame of the bogie and the swing bolster;

the linear guide rail is connected with the nut through a bolt and used for offsetting torque caused by interaction between the nut and the ball screw when the nut moves;

the transmission shaft is connected with the ball screw through a key and synchronously rotates with the ball screw.

2. The energy recovery device based on the excitation of the vertical vibration of the rail vehicle as recited in claim 1, further comprising: the one-way clutch + transmission bevel gear set and the output bevel gear are reversely arranged between the transmission bevel gear and the transmission shaft which are matched with each other and used for rectifying the rotation motion of the transmission shaft;

the planetary gear speed increaser is characterized in that an input shaft of the planetary gear speed increaser is in key connection with an output bevel gear, and the planetary gear speed increaser is used for changing the relatively low-speed rotary motion output by the output bevel gear into high-speed rotary motion;

the permanent magnet motor, motor rotor pass through the key-type connection with the output shaft of star gear speed increaser, through the higher rotary motion of rotor speed, permanent magnet motor contrary uses as the generator in order to induce out three-phase alternating current on motor stator.

3. A method of using the energy recovery device of claim 1 or 2, comprising the steps of:

when the railway vehicle runs, random relative displacement change occurs between the side frame of the bogie and the swing bolster in the vertical direction; in the energy recovery device, a ball screw, a transmission gear box, a planetary gear speed increaser and a permanent magnet motor for generating electricity are arranged on the same frame and are arranged on a side frame or a swing bolster, a nut is connected with the swing bolster or the side frame through a sleeve, and the relative displacement change between the nut and the ball screw is the relative vertical displacement change between the side frame of the bogie and the swing bolster in the vertical direction;

after the ball screw and the nut move relatively, the screw does translational motion along the direction of the ball screw, and the ball screw is excited by the nut to do rotary motion;

the transmission shaft and the ball screw do synchronous rotary motion;

the transmission shaft drives one transmission bevel gear to do synchronous rotation motion, and the other transmission bevel gear is not directly driven by the transmission shaft;

the two transmission bevel gears are meshed with the output bevel gear, and the bidirectional rotary motion of the transmission shaft is expressed as unidirectional rotary motion on the output bevel gear through the transmission of the two transmission bevel gears respectively;

the planetary gear speed increaser is driven by an output bevel gear to do synchronous low-speed rotary motion, and an output shaft of the planetary gear speed increaser does high-speed rotary motion at a certain multiplying power after being accelerated by the planetary gear set;

the permanent magnet motor shaft and the output shaft synchronously rotate at a high speed, and the motor rotor cuts the stator magnetic induction lines under the external driving condition, so that electric energy is induced on the stator.

Technical Field

The invention belongs to the technical field of railway vehicle energy recovery, and relates to a vibration energy recovery device and method based on rail vehicle vertical vibration excitation.

Background

At present, the power supply scheme of the railway vehicle mainly comprises several modes such as hard line power supply, shaft end motor power generation and the like. For trains such as railway freight cars, especially heavy-duty trains, which need to be frequently disassembled and organized into long groups, the power supply cables may be as long as kilometers, the number of connector connection points is hundreds, and the wire resistance and the contact resistance at the connector terminals have a great influence on the power supply. In addition, the freight train and the passenger train have different maintenance systems, and the connection part of the hard line at the train end cannot ensure higher reliability, so that the reliability of the power supply of the train is greatly reduced due to the influence of the higher reliability. The main advantage of shaft end power generation is that the electric energy is provided on the basis of hardly changing the size and the installation mode of the existing bearing, but the electric energy essentially increases the running resistance of the train, so that the train needs to consume more electric energy when running, and additional consumption of traction power is caused.

Disclosure of Invention

In order to overcome the defects of the conventional railway wagon power supply technology, the invention provides a vibration energy recovery device and method based on rail vehicle vertical vibration excitation, so that the problem that a railway wagon lacks a stable power supply is solved, and the vehicle-mounted monitoring equipment can be used on the railway wagon.

In order to achieve the above purpose, the solution of the invention is:

an energy recovery device and method based on vertical vibration excitation of a railway vehicle are disclosed, wherein the railway vehicle comprises a bogie side frame and a swing bolster, the vibration energy recovery device comprises a ball screw and a nut, a transmission gear box consisting of three bevel gears and two one-way clutches, a planetary gear speed increaser and a permanent magnet motor for generating electricity, one end of a mechanical transmission device is arranged on the bogie side frame, and the other end of the mechanical transmission device is connected to the bogie swing bolster. The permanent magnet motor rotates in a high speed and one direction and outputs electric energy to the outside.

Further, the method comprises the following steps: firstly, a vibration energy recovery device based on rail vehicle vertical vibration excitation is provided, which comprises the following components:

the ball screw and the nut set can convert the linear reciprocating motion of the nut into the rotating action of the ball screw when being excited by the vibration between the side frame of the bogie and the swing bolster;

the two linear guide rails are used for guiding, and the linear guide rails are connected with the nuts through bolts and used for offsetting torque caused by interaction between the nuts and the ball screw during movement;

the transmission shaft is connected with the ball screw through a key and synchronously rotates with the ball screw;

the two one-way clutches and the two transmission bevel gear sets are arranged, one output bevel gear is arranged, the two one-way clutches are reversely arranged between the transmission bevel gears and the transmission shaft which are matched with each other, and are used for rectifying the rotary motion of the transmission shaft, namely the bidirectional rotary motion of the transmission shaft is rectified by the one-way clutches to drive the output bevel gear to do unidirectional rotary motion;

the planetary gear speed increaser is characterized in that an input shaft of the planetary gear speed increaser is in key connection with an output bevel gear, and the input shaft of the planetary gear speed increaser is used for converting the relatively low-speed rotary motion output by the output bevel gear into high-speed rotary motion;

the permanent magnet motor is connected with an output shaft of the star-type gear speed increaser through a key, the motor rotor and the star-type gear speed increaser rotate synchronously, the permanent magnet motor is reversely used as a generator through the rotating motion with high rotor speed, and three-phase alternating current is induced on a motor stator.

Meanwhile, the transmission process of the vibration energy recovery device formed by combining the components comprises the following steps:

when the railway wagon runs, the relative vertical displacement change between the side frame of the bogie and the swing bolster can occur in the vertical direction, and the vertical displacement change is random. The ball screw, the transmission gear box, the planetary gear speed increaser and the permanent magnet motor for generating electricity in the vibration energy recovery device are arranged on the same frame and are arranged on the side frame or the swing bolster, the nut is connected with the swing bolster or the side frame through a sleeve, and the relative displacement change between the nut and the ball screw is the vertical displacement change between the side frame and the swing bolster of the bogie relative to each other in the vertical direction

After the ball screw and the nut move relatively, the nut is limited by the two linear guide rails in rotational freedom and can only do translational motion along the direction of the ball screw, so the ball screw is excited by the nut to do rotational motion;

the transmission shaft and the ball screw do synchronous rotary motion because the ball screw is connected with the transmission shaft through a key;

two ends of the transmission shaft are connected with the two transmission bevel gears through two one-way clutches which are installed in opposite directions, direction selection is carried out through the two one-way clutches which are installed in opposite directions, the transmission shaft can only drive one transmission bevel gear to carry out synchronous rotary motion no matter the transmission shaft carries out clockwise or anticlockwise rotary motion, and the other transmission bevel gear is not directly driven by the transmission shaft at the moment;

the two transmission bevel gears are meshed with the output bevel gear, and due to the action of direction selection of the one-way clutch, the two-way rotary motion of the transmission shaft is expressed as one-way rotary motion on the output bevel gear through the transmission of the two transmission bevel gears respectively;

the output bevel gear is connected with an input shaft of the planetary gear speed increaser through a key, the planetary gear speed increaser is driven by the output bevel gear to do synchronous low-speed rotary motion, and an output shaft of the planetary gear speed increaser does high-speed rotary motion at a certain multiplying power after being accelerated by the planetary gear set;

the permanent magnet motor shaft is connected with the output shaft of the planetary gear speed increaser through a key, and synchronously rotates at a high speed with the output shaft, and the motor rotor cuts the stator magnetic induction lines under the external driving condition, so that electric energy is induced on the stator.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1) the distributed power supply can be used as vehicle-mounted monitoring equipment;

2) the energy recovery process does not additionally consume the traction power of the locomotive;

3) the energy recovery process is not easily influenced by the environment;

4) the device has simple design and convenient maintenance, and can be conveniently installed on a vehicle as an independent device.

Drawings

FIG. 1 is a schematic view of the installation position of the vibration energy recovery device based on the vertical vibration excitation of the rail vehicle.

Fig. 2 is a schematic structural diagram of the vibration energy recovery device based on the vertical vibration excitation of the rail vehicle shown in fig. 1.

Fig. 3 is a schematic view of a component mounting position of the vibration energy recovery device corresponding to fig. 2.

Fig. 4 is a schematic view of a first motion state corresponding to that shown in fig. 2.

Fig. 5 is a schematic view of a second motion state corresponding to that shown in fig. 2.

Fig. 6 is a schematic view of a third motion state corresponding to that shown in fig. 2.

Fig. 7 is a schematic view of a fourth motion state corresponding to that shown in fig. 2.

Reference numbers in fig. 1: 11-vibration energy recovery device based on vertical vibration excitation of rail vehicle; 12-a truck sideframe; 13-bogie bolster; 14-wheel pair; 15-steel rail.

The numbers in fig. 2: 21-ball screw nut; 22-ball screw; 23, a coupler; 24-intermediate shaft; 25-a first transmission gear; 26-a second transmission gear; 27-one-way clutch; 28-output bevel gear; 29-output shaft; 20-planetary gear speed increaser and motor.

Reference numbers in fig. 3: 22-ball screw; 21-ball screw nut; 33-a first one-way clutch; 25-a first drive gear; 24-intermediate shaft; 36 — a second one-way clutch; 26-a second transmission gear; 20-planetary gear speed increaser and motor; 28-output bevel gear.

Reference numerals in fig. 4 to 7: 41-input drive shaft; 42 — a first drive bevel gear; 33-a first one-way clutch; 36 — a second one-way clutch; 26-a second transmission bevel gear; 28-output bevel gear.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

As shown in FIG. 1, the invention firstly provides a vibration energy recovery device 1 based on vertical vibration excitation of a railway vehicle, wherein a bogie side frame 2 is supported on a front wheel pair 4 and a rear wheel pair 4 through axle boxes, and a bogie bolster 3 spans the left side frame and the right side frame and is supported with the side frames through springs. The wheel set 4 is placed on the steel rail 5.

Specifically, as shown in fig. 1, the vibration energy recovery device 11 is installed between the truck side frame 12 and the truck bolster 13, and has one end fixed to the truck side frame 12 and one end fixed to the truck bolster 3.

As shown in fig. 2, the vibration energy recovery device is composed of a ball screw nut 21, a ball screw 22, a coupling 23, an intermediate transmission shaft 24, two sets of "transmission bevel gear + one-way clutch", an output bevel gear 28, a planetary gear speed increaser and a motor 20.

As shown in fig. 3, the vibration energy recovery device includes a ball screw 21, a ball screw nut 22, a first one-way clutch 33, a first transmission gear 25, an intermediate shaft 24, a second one-way clutch 36, and a second transmission gear 26, which are axially mounted in a vertical direction, wherein the first one-way clutch 33 is mounted between the first transmission gear 25 and the intermediate shaft 24, and the second one-way clutch 36 is mounted between the second transmission gear 26 and the intermediate shaft 4. The planetary gear speed increaser and the motor 20 realize transmission through the meshing of an output bevel gear 28 and a first transmission gear 25 and a second transmission gear 26. The device is integrally L-shaped, and the first transmission gear 25, the second transmission gear 26 and the output bevel gear 28 are spatially T-shaped.

After having the above structural features, the method of the present invention further specifically includes the following processes:

the first transmission state: the transmission intermediate shaft is connected with a screw rod in the ball screw pair through a key, and the transmission intermediate shaft and the screw rod synchronously rotate. As shown in fig. 4, when the transmission intermediate shaft rotates clockwise (as viewed from top to bottom), the first one-way clutch 33 is engaged, the first bevel gear 41 rotates synchronously with the transmission intermediate shaft, and the output bevel gear 28 is driven by the first bevel gear 41 to rotate clockwise (as viewed from left to right) synchronously with the first bevel gear 41; at this point the second one-way clutch 36 is disengaged and the drive intermediate shaft cannot directly drive the second bevel gear 26 but is driven by the output bevel gear to rotate the second bevel gear 26 in a counterclockwise (when viewed from above) direction.

And a second transmission state: as shown in fig. 5, when the transmission intermediate shaft rotates counterclockwise (as viewed from top to bottom), the second one-way clutch 36 is engaged, the second transmission bevel gear 26 rotates synchronously with the transmission intermediate shaft, and the output bevel gear is driven by the second transmission bevel gear 26 to rotate clockwise (as viewed from left to right); at this point the first one-way clutch 33 is disengaged and the drive intermediate shaft cannot directly drive the first drive bevel gear 42 to rotate, but is driven by the output bevel gear, so that the first drive bevel gear 42 rotates clockwise (when viewed from above).

And a third transmission state: as shown in fig. 6, when the transmission intermediate shaft does not rotate, but the output bevel gear 28 rotates clockwise (viewed from left to right), the first transmission bevel gear 42 and the second transmission bevel gear 26 are simultaneously driven by the output bevel gear 28 to rotate clockwise and counterclockwise (viewed from top to bottom), respectively; however, when the first one-way clutch 33 and the second one-way clutch 36 are simultaneously disengaged, the rotational motion of the first bevel gear 42 and the second bevel gear 26 is not transmitted to the intermediate transmission shaft. Output bevel gear 28 is thus free to rotate in a clockwise direction (viewed from left to right). According to the characteristic of the mechanical rectification module, the generator can realize rotation and power generation by utilizing the self rotational inertia under the condition that the input rotating speed of the input transmission shaft is zero or extremely low.

And a fourth transmission state: as shown in fig. 7, when the transmission intermediate shaft does not rotate, but the output bevel gear 28 rotates counterclockwise (viewed from left to right), the first transmission bevel gear 42 and the second transmission bevel gear 26 are simultaneously driven by the output bevel gear 28 to rotate clockwise and counterclockwise (viewed from top to bottom), respectively; at this time, the first one-way clutch 33 and the second one-way clutch 36 are simultaneously in the engaged state, the rotational motions of the first bevel transmission gear 42 and the second bevel transmission gear 26 are both transmitted to the input transmission shaft, and since the transmission intermediate shafts can only complete the rotational motion in one direction at the same time, the transmission intermediate shafts are acted by torques with equal magnitude and opposite directions and cannot perform the rotational motion in any direction. Output bevel gear 28 is thus locked in the clockwise direction (viewed from left to right) and cannot perform a reverse rotational movement.

When the train is operating in a normal state, the vibration energy recovery device can output electric power of 30W or more. The electric power is connected with a charging circuit and a lithium battery at a vibration energy recovery device, the electric power is measured under the working condition that the vibration condition is optimal, the real-time charging voltage u and the charging current i of the lithium battery in a period of time t are collected through a signal acquisition device with the sampling rate f being 1000Hz, and the electric power is obtained through a formula

And (6) calculating. The electric power can meet the power consumption requirements of the wireless ECP brake system equipment and the real-time monitoring equipment of the railway wagon.

The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.