Structural Design Analysis of Double-row Hole Flat Die for Straw Briquetting Machine

The flat model straw briquetting machine is mainly composed of an electric motor, a gearbox, a main shaft, a pressing wheel, a flat die, a forming sleeve and a feeding conveyor. The pressure roller is mounted on both ends of the same horizontally arranged squeeze wheel axle

2.1 The structure and working principle of the flat model straw forming machine

The flat model straw briquetting machine is mainly composed of an electric motor, a gearbox, a main shaft, a pressing wheel, a flat die, a forming sleeve and a feeding conveyor. The pressure roller is installed at both ends of the same horizontally arranged squeeze wheel shaft, and is rotated by the main shaft. A plurality of forming sleeves are evenly embedded in the flat mold.

2.2 Analysis of ways to increase production capacity

Before conducting the straw briquetting machine, we conducted market research. At present, the production capacity of the straw molding machine of the same type and the same power in China is about 300kg/h. To achieve the design capacity of 500kg/h, only two parameters are changed, one is to increase the number of forming sleeves, and the other is to increase the discharge flow.

2.2.1 Analysis of increasing the number of forming sleeves

According to the working principle of the flat model straw briquetting machine, the holes designed for mounting the forming sleeve on the flat mold must be distributed on the concentric circles of the flat mold. If a single-row hole structure is used, increasing the number of forming sleeves to 170% (500/300) will inevitably increase the diameter of the flat mold by about 170%, but this solution will reduce the discharge flow rate due to the increase in the diameter of the flat mold. When the motor power is constant, the effect is not large. Another solution is to design a flat die with a double-row hole structure with a small increase in the diameter of the flat die (5%). This solution requires an increase in the width of the press wheel due to the increase in the radial span of the orifice, but the increased width is limited. Through research and research, the molding efficiency can be improved and the design index can be achieved under the condition that the motor power is constant.

Through the above analysis, it is feasible to increase the number of forming sleeves to increase production capacity.

2.2.2 Analysis of increasing discharge flow

In order to verify the feasibility of the scheme, under the premise of constant motor power, we adopted technical measures such as changing the design parameters of the pressure roller, modifying the length-to-diameter ratio of the forming sleeve, and increasing the diameter of the forming sleeve. The test was carried out through the prototype, and the results were The design goals are quite large. Therefore, the program was abandoned.

In summary, the use of a flat die with a double row of holes is a good technical measure, but the working characteristics of the pressure roller need to be analyzed.

This guides the design of the flat mold.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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