Generally, the parameters of the length of the front cone, middle cone and back cone of the mixing drum of the automatic concrete mixer are generally 2100~2300mm. If the large diameter is 2400mm, the automatic concrete mixer will drift when turning, which may cause accidents. Now let's introduce the spiral blades of the mixing drum.
The inner wall of the mixing drum of the fully automatic concrete mixer truck is usually equipped with a pair of ribbon shaped spiral blades, which are installed 180 ° staggered, and left-handed blades are used. When the mixing drum rotates, the two spiral blades are driven to move around the mixing axis to realize the concrete feeding, mixing and unloading operations. The mixing drum can be divided into two sections according to its function. The outlet section of the tail cone is the unloading guide section. The cylinder section and the front cone section are mainly used to stir the concrete during transportation to prevent solidification and segregation. The bottom concrete is pushed out during unloading.
Conical helicoid refers to the conical helicoid formed by the generatrix aa 'rotating around the central axis of the cone and along the spiral track of the cylinder wall, and the movement track of the generatrix. The generatrix is a straight line forming a ruled helicoid, and the generatrix is a curve forming a non ruled helicoid. In the ruled helicoid, the generatrix is orthogonal to the central axis of the cone to form the ruled helicoid; The generatrix is oblique to the central axis of the cone, forming a ruled oblique helicoid.
You think there are two helices in the mixer cylinder. In fact, there are nine helices in the cylinder, namely, the blade root helix (helix 1) and the blade tip helix (helix 4) in the front cone part, the blade root helix (helix 2) and the blade tip helix (helix 5) in the cylinder part, the blade root helix (helix 3) in the tail cone part, the blade middle helix (helix 6 and helix 8) Helix at blade top (Helix 7 and Helix 9), where Helix 8 and Helix 9 are transitional helices between cylindrical part and tail cone part.
The types of the root and top of the spiral lines and the spiral angle of these mixing drums determine the strength of the axial or tangential movement of concrete in the mixing drum, thus affecting the performance of mixing and discharging, which is the key to the design of mixing drums.
That's all for the introduction of the spiral blades of the mixing drum of the automatic concrete mixer. Do you have any doubts or needs? Welcome to our website http://www.zkzdsljbc.com Check relevant information or contact relevant personnel for consultation!