Method for determining blade structure of mixing drum of concrete transit mixer

Abstract

The invention discloses a method for determining a mixing blade structure of a mixing drum of a concrete transit mixer. In the method, a concrete mixing drum-based functional subdivision method is provided to subdivide the mixing drum into N parts along the axial direction, wherein N is more than or equal to 3; a corresponding spiral line is designed according to local function requirement of each part of small drum; each section of spiral line is smoothly connected to generate the entire spiral line; a blade is generated according to the overall design indexes of the mixing drum, such as slump degree, gliding angle, drum mounting angle and the like; and optimization is performed through a density gradient change theory and a drum subdivision displacement calculation method. By the method, a fine structure of the mixing drum of the concrete transit mixer can be determined. The blade determined by the method improves the overall performance of the concrete transit mixer.

Description

technical field [0001] The invention belongs to the field of engineering machinery and relates to a method for determining the blade structure of a mixing tank of a concrete mixing transport vehicle. Background technique [0002] At present, the methods for determining the blade structure of the mixing drum of the concrete mixer truck mainly include: the "calculation cone" method and the three-stage method of solving the helix to generate the blade. [0003] The main idea of ​​the method of "computational cone" is to establish a virtual "calculation cone". Correspondence between the lines, by calculating the points on the "calculation cone", the deformed logarithmic helix curve helix on the solid cone surface can be obtained. Therefore, the amount of calculation is very large, and the selection of the helix angle mainly depends on empirical values, which cannot achieve precise design. As a result, the mixing performance of the concrete truck cannot be greatly improved. ...

AI Technical Summary

Problems solved by technology

Therefore, in the selection of the helix angle, only "compromise" and "compromise" methods can be adopted, so that the mixing performance of the concrete mixer truck cannot be significantly improved.

In addition, due to the different helix angles of the three helixes, the smoothness of the blades is not good, which also affects the overall performance of the concrete mixer truck.

[0005] Although on the basis of the above method, many companies have added a lot of additional devices in the mixing drum, the overall mixing performance of the concrete mixer truck cannot be greatly improved.

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