1. Strengthen key technologies for special fans for road sweepers The blower is a very important part of the road sweeper. The blower is the heart of dust collection by the road sweeper. Large air flow and pressure are the reliable guarantee for efficient dust collection. High-efficiency centrifugal fans must be used because of the sweeper's operation. The instability of working conditions, therefore, there must be a certain margin in the selection of fans in order to ensure that the road sweeping vehicle achieves perfect dust collection effect under various road conditions. Due to space constraints, the fan shape should be as compact as possible. At the same time reducing noise is one of the important factors to consider when selecting a fan. There is a big gap between the fans of China's road sweeping vehicles and developed countries. At present, most of the fans of road sweeping vehicles in China use general-purpose fans or fans that have been converted from general-purpose fans. Because general-purpose fans are designed for general-purpose ventilation, their volume, wear resistance, and dust-proof ability cannot meet the requirements of poor working conditions of road sweepers. 2. Research on Key Technologies of Compressed Air System The compressed air system is also an important part of the road sweeper's operating power. The compressed air system is provided by the chassis engine to provide compressed air to drive the cylinder to produce a predetermined motion to complete the following functions: adjust the brush brush ground pressure, brush buffer protection role, When it meets the raised ground, it will float upwards. The adjustment of air pressure is completed in the cab. Each end of the roller brush has a lifting cylinder, and the other end is hung on the frame. The electronic control system is used to operate the cylinder to drive the roller brush to complete lifting and lowering. The cylinder can also adjust the ground pressure so that it has a 20 degree arc contact with the ground. The lifting cylinder is a hydraulic damping cylinder, which ensures that it is always in contact with the ground and the ground pressure is equal. It can also act as a damping buffer to ensure that the roller brush is not impacted. The suction angle cylinder can lift the front edge of the suction mouth to suck in large pieces of garbage. When the air cylinder is started or stopped, the lifting cylinder can raise or lower the suction mouth to the ground. 3, research on key technologies of cleaning dust collection system The cleaning dust collecting system includes a disk brush device, a roller brush device, a suction mouth device, and a dust collecting box, which are key components of the road sweeping vehicle. The disk brush device is responsible for the task of cleaning and collecting garbage near the barriers and at the corners of the barriers. It consists of a disk brush and a bracket, an oil motor, a swing arm mechanism, a cylinder and a bracket, a wire and roller mechanism baffle, and a transmission mechanism. The roller brushing device is mainly used for sweeping a large area of ​​road in the middle of the road and collecting garbage near the suction port. It is composed of a roller brush, a casing, an oil motor, an oscillating oil cylinder, a lifting cylinder and a rotating bracket. It is necessary for road sweeper manufacturers to discuss the optimal grounding pressure for brush sweeping on road sweepers and to design a sweeping device that can automatically adjust sweeping ground pressure in order to achieve the best cleaning effect while minimizing sweeping wear. . There is also dust removal system research: The advantages and disadvantages of the dust removal system affect the secondary discharge of the road sweeper. 4. Research on Key Technologies of Wind Tunnel The design of the sweeper air duct seriously affects the dust collection capacity and power utilization of the road sweeper. The air path type of the sweeper only has two types of air ducts with anti-blow and two air ducts without back blow, but their shapes are different. The shape of the air duct, whether it is provided with backflush, and the proportion of the counter-blowing air volume to the wind volume of the fan will all have an influence on the air flow resistance of the road sweeper. The influence of this airflow resistance will change the total pressure and air volume of the fan. It is necessary to conduct a pilot study on the duct system of the road sweeper to determine the drag coefficient that influences the air flow resistance of the shape of the road sweeper, determine the magnitude of the resistance generated by the reverse blow duct and the effect of the drag on the air volume of the blower. Only in this way can we design a duct system with good cleaning effect, low airflow resistance and high power utilization rate. 5, the key technology of hydraulic system The hydraulic system is an important part of the road sweeper. A large number of actions are performed during the operation of the road sweeper. The working conditions of the hydraulic system directly affect the performance of the entire vehicle. The following describes in detail the functions performed by the hydraulic system: the outreach and fall of the disk brush is completed. , making it in contact with the road surface for cleaning operations; completing the retraction of the disk brush to restore its state of operation; completing the rotation operation of the disk brush; tilting the left and right sides of the swing cylinder to drive the roller brush; rotation of the roller brush; guardrail cleaning device The outstretched retracted with the spin; the lifting and falling of the bins lifted and tilted. 6. Key technologies for wearable parts The wearable parts of the road sweeper are: sweeper, straw, fan, suction nozzle, air duct, etc. The wear resistance of the road sweeper components directly affects the cost of using the road sweeper. In particular, whether the sweeper is wearable has the greatest impact on the use cost of the road sweeper. It can be said that sweeping wear is currently the most serious problem in China's road sweeper wear. Enhancing the wear resistance of road sweeper components is one of the most effective and straightforward ways to improve its reliability. Therefore, road sweeper manufacturers are highly concerned with how to improve the wear resistance of components. The technical difficulties of our country's sweeping vehicles are many, and the level of cleaning operations such as sweeping efficiency, sweeping capacity, dust removal effect, etc. is comparable to that of developed countries. However, the noise, emissions, reliability, comfort, and automatic adjustment of the sweeper still remain. There is a large gap, which is only equivalent to the level of products developed in the late 1980s to the early 1990s in developed countries. According to the current level and quality of China's sweeper trucks, in the design of sweeper trucks in China, there is still a lack of research on special parts, lack of guidance on design theory, more experience than calculation, more imitation, and less innovation. So overall our national sweeper still needs a bigger leap. High Back Shopping Basket,Grocery High Back Basket,Shop High Back Basket,Supermarket High Back Basket Jiangsu Mingya Commercial Equipment Co., Ltd. , https://www.mingyashelves.com