Papers by Author: Zhi Hua Li

Abstract: The energy saving method in tire factory has got more and more attention. In view of the characteristics that the using air capacity is vast and not steady-going in tire factory, the paper analyses and discusses the enactment of the running parameters and the choice of the running mode about the air compressing system, and sets forth the resolving project to raise the running efficiency and achieve the purpose of energy saving.

Abstract: According to the properties of carbon black, this paper considers that the better filter as the dust removal equipment for carbon black pneumatic conveying system is pulse bag filter, describes the structure and working principle of the pulse bag filter, puts forward the factors to be considered and technical parameters to be selected to make sure that the carbon black pneumatic conveying system can work long and stably.

Abstract: With the computational fluid dynamics (usually being called “computational fluid dynamics” for CFD) method, the velocity field between the air nozzle and the filtering bag and the velocity distribution inside the filtering bag are computed when changing the distance between the air nozzle and the filtering bag. And the pressure distribution inside the filtering bag is also computed at different injecting times. According to the simulation result, this article has analyzed the influence of different distances between the air nozzle and the filtering bag and different injecting times on the dust-cleaning effect, and supplied theoretical basis to design the optimal pulse bag filter.

Abstract: Introduced the pneumatic conveying devices and conveying principles when conveying phase is about pulsed solid-plug, analyzed the flow action of solid-plug and the relationship between the conveying parameters while conveying, provided a reference for the correct design and use of this type of pneumatic conveying system.

Abstract: The dense phase pneumatic conveying system of carbon black and the experimental process are introduced in the paper. According to the test data, the factors that influence the carbon black conveying performance are analysed. This paper points out that the higher of air flow rate will increase the conveying capacity of carbon black, but will approach to a critical value. The open pressure of the blow pot has a optimal extent, in which the carbon black conveying time will be the shortest. This paper also points out that the longer the conveying distance, the higher the carbon black fragmentation rate.

Abstract: The article analyses the main factors such as the species and character of the carbon black, the conveying pressure and gas-flow rate which influence the flow character of carbon black during pneumatic conveying. And also studies the flow character of carbon black in dense phase pneumatic conveying system with experiment. It raises the view that the carbon black with narrow particle diameter distribution, especially with bigger size is favorable for saving energy and reducing fragmentation; the conveying pressure approach lowest point should be chosen during carbon black pneumatic conveying, and the quantity of elbow pipe should be used as less as possible; on condition that the conveying capacity is guaranteed, the lower air feeding volume is preferable; the higher the conveying pressure is, the lower the fragmentation of the carbon black will be. The article also supplies the reference for technology parameter choosing and carbon black conveying system design.

Abstract: By analyzing the technology process of all steel radial truck tire building machine, the author finds that there is a big potential of improvement both in stitching effect and efficiency. A new kind of stitching and control device is designed to replace the original. The new device can realize the soft stitching of tire, which reduces redundant actions and thus optimizes the process and improves the stitching efficiency. It is found in tests that the optimized process reduces the blister defectives greatly. Both productivity and quality of tires are improved significantly. It shows a big economic benefit.