阅读说明：本技术 一种基于减速带能量回收的车库入口自运行系统 (Garage entry is from operation system based on deceleration strip energy recuperation ) 是由 侯沁盈 胡洪涛 何远飞 于 2020-10-28 设计创作，主要内容包括：本发明公开了一种基于减速带能量回收的车库入口自运行系统。当汽车驶过该装置时,活塞在车轮作用下向下运动,油腔的油液在压力作用下从单向阀流出,流入蓄能器,进而带动发电装置发电。采用回位弹簧与液压缸连接实现减速带自动回位,多次发电高效回收利用能量；建模分析减速带区域,合理分配液压缸位置,极大地提高了回收减速带能量的效率。(The invention discloses a garage entrance self-operation system based on deceleration strip energy recovery. When the automobile drives through the device, the piston moves downwards under the action of the wheels, and oil in the oil cavity flows out of the one-way valve under the action of pressure and flows into the energy accumulator, so that the power generation device is driven to generate power. The deceleration strip is automatically returned by connecting the return spring with the hydraulic cylinder, and energy is efficiently recycled after multiple times of power generation; and the deceleration strip area is modeled and analyzed, the positions of the hydraulic cylinders are reasonably distributed, and the efficiency of recovering the energy of the deceleration strip is greatly improved.)

1. The utility model provides a garage entry is from operation system based on deceleration strip energy recuperation which characterized in that: when an automobile drives through the device, the piston moves downwards under the action of wheels to squeeze fluid in the cylinder, the fluid in the cavity flows out of the container under the action of pressure and flows through the motor through the pipeline to drive the power generation device to generate power;

then the fluid returns to the cavity again through the pipeline for supply so as to be ready for next power generation.

2. The garage entrance self-operation system based on deceleration strip energy recovery of claim 1, characterized in that: the storage battery is connected with the generator, the generator is connected with the electric device, and redundant electric quantity can be stored in the storage battery under the condition that the electric device works normally.

3. The garage entrance self-operation system based on deceleration strip energy recovery of claim 1, characterized in that: the deceleration strip is automatically returned by adopting a return spring device, and the fluid repeatedly flows through the motor to realize multiple times of power generation.

4. The garage entrance self-operation system based on deceleration strip energy recovery of claim 1, characterized in that: the hydraulic cylinders are arranged in the deceleration strips in different areas, and the vehicles pass through the high-frequency area through calculation, so that the efficiency of recovering the energy of the deceleration strips is greatly improved.

5. The garage entrance self-operation system based on deceleration strip energy recovery of claim 1, characterized in that: an infrared temperature measuring gun is connected with a generator and arranged at a fence port, and finally data are collected through a device and analyzed and alarmed.

6. The garage entrance self-operation system based on deceleration strip energy recovery of claim 1, characterized in that: the infrared sensor automatically senses temperature and converts the temperature into an electric signal, the amplifier transmits the amplified electric signal to the A/D converter, the electric signal is converted into a digital signal and transmitted to the singlechip, and finally, the functions of data analysis and alarm are realized.

Technical Field

The invention relates to the field of hydraulic power generation, in particular to a garage entrance self-operation system based on deceleration strip energy recovery.

Background

In recent years, the energy recovery technology is more and more emphasized by researchers at home and abroad, and in order to recover the vibration energy when a vehicle passes through a highway deceleration strip, four methods are mainly adopted on a technical route: electromagnetic acquisition, hydraulic acquisition, mechanical acquisition, and piezoelectric acquisition.

1) The electromagnetic acquisition refers to the utilization of a tubular permanent magnet linear motor as an energy converter for recovering the vibration energy of the deceleration strip, and the main difficulty is in the design of the linear motor and the design of an electric energy collecting and storing circuit, so that the engineering application difficulty is high, and the cost is high.

2) The piezoelectric acquisition and recovery principle is that when a vehicle runs across a road surface, the road surface vibrates, a mass block of the device vibrates along with the road surface, and the vibration is converted into electric energy through the piezoelectric effect. The invention features serpentine shapes of piezoelectric material to achieve higher vibration energy. The device has higher technical difficulty; the whole system is high in cost, the pavement (asphalt or cement) needs to be modified, and the laying difficulty of the device is high.

3) The mechanical acquisition device is characterized in that a Mechanical Motion Rectifier (MMR) is utilized to convert downward and upward linear motions of a vehicle when the vehicle presses down a speed bump into unidirectional rotation motion of a shaft, and then the shaft is accelerated through a gear box to drive a generator to generate electricity. The speed bump is high in precision after being assembled with the speed bump, and the speed bump is often impacted, so that the mechanical system works in a severe environment for a long time, the impact resistance reliability is low, and the service life is short.

4) The hydraulic collection means that when an automobile drives through the device, the piston moves downwards under the action of wheels, oil in the oil cavity flows out of the one-way valve under the action of pressure and flows into the energy accumulator, and then the power generation device is driven to generate power. The energy loss of the device mainly refers to pressure loss caused by fluid flowing in a hydraulic element and a pipeline and liquid leakage, the energy is converted by a hydraulic pump, a hydraulic motor is used for driving a generator to rotate to generate power, but the device recovers energy in a unidirectional continuous mode, and the energy recovery efficiency is low.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a garage entrance self-running system based on deceleration strip energy recovery.

The technical scheme adopted by the invention is as follows: when the automobile drives through the device, the piston moves downwards under the action of the wheels to squeeze fluid in the cylinder, and the fluid in the cavity flows out of the container under the action of pressure and flows through the motor through the pipeline to drive the power generation device to generate power. Then the fluid returns to the cavity again through the pipeline for supply so as to be ready for next power generation. Compared with the prior art, the deceleration strip has the advantages that the deceleration strip is automatically returned by connecting the return spring with the hydraulic cylinder, so that fluid automatically returns to the cavity, and energy is efficiently recycled;

compared with the prior art, the hydraulic cylinder is arranged in the deceleration strip in different areas, vehicles pass through a high-frequency area in a calculation mode, and the efficiency of recovering the energy of the deceleration strip is greatly improved.

Compared with the prior art, the invention has the beneficial effects that the storage battery is connected with the generator, and the generator is connected with the power utilization device, so that the redundant electric quantity can be stored in the storage battery under the normal working condition of the power utilization device.

Compared with the prior art, the invention has the advantages that the infrared temperature measuring gun is connected with the generator and arranged at the fence port, and the body temperature data is recorded and analyzed, thereby realizing the combination with epidemic prevention automation.

Compared with the prior art, the invention has the advantages that the infrared sensor automatically senses temperature and converts the temperature into an electric signal, the amplifier transmits the amplified electric signal to the A/D converter, the electric signal is converted into a digital signal and transmitted to the singlechip, and finally, the data analysis and alarm functions are realized.

Drawings

FIG. 1 is a view showing the internal structure of a system;

FIG. 2 is a view showing the internal structure of the hydraulic cylinder;

FIG. 3 is a graph of vehicle speed versus maximum wheel acceleration;

FIG. 4 is a generator block diagram;

FIG. 5 is a view of a hydraulic motor;

FIG. 6 is a schematic diagram of an accumulator;

FIG. 7 is a circuit diagram of a temperature measurement system;

FIG. 8 is a schematic diagram of a temperature measurement system.

Fig. 9 is a schematic diagram of an application scenario of the whole system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.

As shown in FIG. 1, a high-probability area of the automobile tire pressure passing through the deceleration strip is obtained through modeling analysis and calculation, a piston is arranged right below the high-probability area to transmit pressure, and the piston and an oil cylinder are integrated. The spring is arranged on the top of the oil cylinder. A hydraulic motor is installed at the opening of a pipeline through which oil flows, the hydraulic motor is connected with a generator, and the generator is connected with a rod lifting system and a storage battery.

The piston and cylinder part is shown in figure 2, and in consideration of the balance problem of the piston, the device is divided into two parts, and the piston is arranged in a high-frequency area pressed by a tire.

In consideration of the uneven problem of the deceleration strip, the deceleration strip is designed into an individual circulating structure, the oil cylinder is divided into an upper part and a lower part, when the piston is extruded, fluid in the lower part is pressed to the energy accumulator and flows to the upper part of the oil cylinder through the flow control valve and the hydraulic motor, and when the spring is reset and the piston moves in the reverse direction, the fluid returns to the original path to generate electricity again.

The structural dimensions of the hydraulic cylinder are limited by the maximum load and the working pressure. Firstly, the maximum load is analyzed, and the maximum load pressure of the deceleration strip is calculated according to the formula:

（*）

according to the speed limit standard of an urban highway, deceleration strips are reasonably designed and arranged, so that the speed of most vehicles passing through the deceleration strips is 10-20 km/h, the speed is taken as a research object, and a relation graph shown in figure 3 can be obtained by combining the relation between the speed of the vehicles passing through the deceleration strips and the maximum acceleration of wheels.

As can be seen from fig. 3, the maximum acceleration of the wheels increases first and then decreases, and the effect of the deceleration strip on the vehicle also shows a trend of increasing first and then decreasing as the vehicle speed increases. Combining the specification of the speed bump (3 m 0.35m 0.1 m), substituting the formula to obtain: the maximum load Fmax =400kN of the vehicle to the speed bump at the maximum speed of the speed bump of 30 km/h; therefore, when the medium-low pressure range is selected, the maximum pressure is 4 MPa.

Diameter of working chamber of hydraulic cylinder:

is composed ofIs calculated to obtainD=252mm

Since the vehicle does not act directly on the hydraulic system in the project, but the piston is driven, and the spring consumes part of the energy. The actual force acting directly on the hydraulic system is less thanFmaxThe cylinder diameter is then chosen to be 250 mm.

The working condition of the hydraulic cylinder can be known, the hydraulic cylinder is mainly pressed, so the diameter of the piston rod is calculated according to the calculation formula (1)d=0.5~0.7DTo sum upd125mm was chosen.

（1）

In the formula:is the yield strength; and n is a safety factor.

Verifying the selected piston rod diameter: the material of the hydraulic rod is 45# steel. The 45# steel corresponds to a material yield strength of not less than 335 MPa. And because the hydraulic cylinder is impacted, a larger safety factor 10 is obtained. If the piston diameter d is required to be larger than 87.2mm by substituting formula (1), the previously selected diameter of 125mm is suitable.

Because the maximum deformation stroke of the deceleration strip is limited to 100mm, the maximum stroke of the piston of the hydraulic cylinder is larger than 100mm, and the maximum stroke is 120mm according to the national standard.

Because the hydraulic cylinder will be subjected to impact load in this project, a thick-wall calculation formula is adopted:

in the formula: p is a radical of_aA hydraulic cylinder test pressure (Pa); sigma_bIs the allowable stress (Pa).

Through calculation: the wall thickness of the hydraulic cylinder must be larger than 5.8mm, and for manufacturing convenience, the wall thickness of the hydraulic cylinder is 6 mm.

As shown in the figure 4, the generator selects a Y80M1-4 model, the output power is 550W, the rated rotation speed 1390r/min, the efficiency is 73 percent, and the power factor is 0.76.

The hydraulic motor of fig. 5 is a double-acting vane type hydraulic motor. The model is YM-40 vane type hydraulic motor, the theoretical discharge capacity is 43ml/r, the maximum pressure in continuous is 15.5MPa, the maximum pressure in discontinuous is 17.5MPa, the torque range is 108.5-122.5 Nm, the rotating speed range is 100-2200 r/min, the weight is about 20kg, the volumetric efficiency is 90%, and the total efficiency is 70%. According to the parameters, the output torque is up to 110Nm under the rated pressure,

the discharge capacity is:；

the rated flow rate is:

as shown in figure 6 accumulator model number selection NxQModel L16 bladder accumulator (threaded connection), nominal volume 16L, nominal pressure 31.5 MPa.

Effective working volume of accumulator. Wherein, V₀Is the volume (L), V) of the accumulator_xIs the effective working volume (L) of the accumulator; p₁The highest working pressure (MPa) of the system is obtained; p₂The lowest working pressure (MPa) of the system; p₀For the charging pressure (MPa) of the accumulator, when used as a liquid supplementing device, P₀=P₁(ii) a n is a polytropic exponent, and n =1.4 in heat insulation.

The stored hydraulic pressure is about 6.12L, and relative to the rated flow of 50.03L/min, the fully released energy needs about 7.34s, and the electric energy generated under the normal operation of the motor is driven in the period W =7.34 × 550= 4037J. A vehicle passes through to generate approximately 16KJ of electrical energy.

Since the original current generated by the hydraulic power generation device is unstable alternating current, it needs to be converted into stable direct current or alternating current for storage and use. We process the raw current using the circuit in fig. 7.