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Tank Body Design and Finite Element Analysis of Bulker Trailer

January 12, 2021

Tank Body Design and Finite Element Analysis of Bulker Trailer


There are still many domestic cement plants built in remote mountainous areas. The cement plant has a narrow site and it is not convenient for a 13m bulker trailer to drive and turn around. Therefore, the bulk trailer required in this area requires the trailer to be designed as short as possible to facilitate Reduce the turning radius of the bulker trailer, and at the same time can meet the requirements of the main trailer to match the 12m ground scale. This type of vehicle is generally used for intra-city transportation or short-distance transportation, and is not subject to domestic restrictions on overload control.

Naturally, the larger the volume design of the bulker trailer, the better. At present, in order to meet the above requirements, many domestic bulker trailer manufacturers usually choose to design the Jinxiu as an ultra-wide model, thereby increasing the effective volume of the tank and reducing the length of the trailer.

Tank Body Design and Finite Element Analysis of Bulker Trailer

Bulker Cement Trailer Ready for Shipment

The common models in the market are:

1. The width of the tank of the bulker trailer is designed to be about 2.6m-2.7m, and the tank and the seal are not broken. It is difficult to tell from the appearance that it is an ultra-wide vehicle. Only the width or tank can be measured by infrared. It can only be detected by body width measurement; ②Break open the front and rear heads and add a straight section with a certain width in the middle of the tank, so as to increase the tank volume without increasing the length of the male body and the length of the vehicle.

As the state has stepped up its investigation and punishment of special-purpose vehicle manufacturers this year, more and more companies have stopped producing non-standard models (extra-long and ultra-wide models). In order to meet the individual needs of the market, how to design the tank volume to the maximum under the premise of meeting the regulations has become a major research topic for the powder tanker designers.

This article introduces a new type of cement trailer tank body. The design of this tank body fully borrows the design concept of liquid tank trailer, and the tank section is designed as a special-shaped section. Under the same tank size (including length, width and height). The effective volume of the tank can be increased by about 3.3m

Tank Body Design and Finite Element Analysis of Bulker Trailer

Design of new tank section and Pro/ENGINEER finite element analysis

Tank structure design

The cement trailer is generally formed by splicing the front head, the rear head, and the multi-segment tank body. Take the "dual warehouse" tank body as an example. The multi-segment tank body is composed of multiple tank bodies. The front and rear are generally provided with an inclination angle of 13° or 14°, mainly to meet the angle required for the material to reach the fluidized state.

Among them, the tank body and the end of the tank body and the head butt, the cross section of the tank body is ring-shaped, which is convenient for the docking between the head and the tank body: because the tank body has a certain inclination in the front and rear direction and the tank body width must not exceed 2.5m, So that the cross-section between the remaining tanks is designed as a long circular cross-section. That is, the tank section is composed of 4 arcs. The upper and lower sections of the section are equal-diameter arcs. Both sides of the section are equal-diameter arcs. The side arcs are generally tangent to the upper and lower arcs.

The tensile strength is 55OMPa-700MPa, and the elongation is ≥18%. The bulker trailer is mainly composed of the tank body assembly, the frame assembly and the walking mechanism. The tank assembly includes the tank, fluidization system and reinforcement device. The lower part of the tank body is welded to the frame, supported by multiple frame beams and left and right longitudinal beams.

A fluidization system is installed inside the tank body. The slide plates in the fluidization system are snap-welded on both sides of the lower part of the tank body. There are a large number of support plates welded on the lower part of the slide plate, so the bottom tank body and the upper part of the slide plate are deformed and small, and the tank body is mainly deformed And mainly concentrated on the top of the tank and the side of the tank (that is, the part of the tank above the skateboard)

Tank Body Design and Finite Element Analysis of Bulker Trailer

Simplified finite element analysis module

The local stress of the tank body is mainly reflected in several working conditions such as rapid braking, rapid turning and unloading. Among them, the tank body can bear the largest stress value when unloading under pressure, so only the tank under the unloading condition is needed. Static analysis. Optimize the internal reinforcement method of the male body through static analysis.

When modeling, the material cover, walking platform and some accessory parts on the tank body can be ignored. It is assumed that the welding force and torque transmission between the tank body and the tank body are reliable. The influence of the selection factors such as residual stress in the manufacturing process can be ignored, and the process factors that have little effect on the overall structure (such as: small fillets, chamfers, welds, etc.).

At the same time, ignoring the pressure drop of 0.01 MPa-0.O2 MPa generated when the compressed air discharged from the air compressor passes through the fluidized zone in the shaking-relief condition, the combined load of the pressure load of 0.2 MPa and the physical weight load is applied to the inner wall of the tank during the analysis. Considering the symmetrical layout of the tank body, in order to view the tank stress and tank body deformation more quickly and clearly, only 1/2 of the upper tank body of the fluidization system is modeled and analyzed.

Tank Body Design and Finite Element Analysis of Bulker Trailer

Cement Trailer V Shape (Type) is used for carrying cement, lime, Powder Calcite, Silica, flour and any other powder materials in bulk, which is mostly preferred all over the World.

Trucks are used to transport Cement Trailers. Those we are producing have load capacities from 20 to 60 m3. The carrier consists of a tank on a semitrailer. Mounted inside the tank are chutes that feed air in to the cement, the chutes consist of the metal troug, a porous partition made of special material, and a metal incline .An air compressor is mounted on the chassis of the trailer usually on the front of the trailer. Wee use 3 head or 2 Head, powered compressor with pistons and Diesel Deutz motor or Electirical motor Bekomsan brand.

The sement-trailer usually loaded by gravity. But we alsou produce vacuum self-loading cement trailer. Unloading is accomplished by starting the air compressor we use in our bulk cement trailers, air then passes through the partition of the chute into the cement in the fine jets. The aerated cement flows like a liquid through the chutes. Compressed air feeds the cement through the nozzle to a unloading hoses.