Hollow shaft rotary sealing concrete mixing truck

A mixing transport vehicle and rotary sealing technology, which is applied to cement mixing devices, clay preparation devices, chemical instruments and methods, etc., can solve problems such as weak sealing effect of end faces, complicated maintenance work, and large wear and tear of parts, so as to ensure Sealing effect, reduced maintenance difficulty, fast discharge effect

Active Publication Date: 2017-11-14
YANTAI SHENGLIDA ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The radial seal has the advantages of good sealing effect, high reliability, and large load-carrying capacity, but the existing problems are that the parts wear a lot and the maintenance work is complicated
The sealing effect of the end face seal is weaker than that of the radial seal. Since the cover does not rotate, it also has the defects of large wear and poor reliability, so it is rarely used

Method used

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  • Hollow shaft rotary sealing concrete mixing truck
  • Hollow shaft rotary sealing concrete mixing truck

Examples

Experimental program
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Effect test

specific Embodiment 1

[0021] A concrete mixer truck with a hollow shaft rotary seal, such as figure 1 , including a mixing drum 1 installed on the car body and capable of rotating relative to the car body, a feeding drum 2 is arranged at the center of the outlet of the mixing drum 1;

[0022] The mixer truck also includes a moving part that is installed on the car body and can move relative to the car body. The moving part is a rotating bracket 7 that is mounted on the car body in a rotational connection through a hinged shaft 8, and is also provided with a drive cylinder. One end of the drive cylinder is hinged with the rotary bracket, and the other end is hinged with the car body, and the rotary bracket 7 can be rotated and opened under the action of the drive cylinder.

[0023] A sealing cover 3 is mounted on the moving part through a slewing support, and the slewing support includes a static ring 6 fixedly connected to the moving part by bolts and a moving ring 5 fixedly connected to the sealin...

specific Embodiment 2

[0029] The difference between this embodiment and the first embodiment is that the moving part is a sliding bracket installed on the vehicle body through a sliding fit, and can move back and forth relative to the vehicle body through a linear drive device to realize the opening and closing of the mixing drum 1 .

[0030] In order to ensure that the feeding hopper 9 can always be connected with the feeding cylinder 2 when moving back and forth, and avoid material leakage when the sliding bracket moves back and forth, the junction of the feeding hopper 9 and the feeding cylinder 2 is provided with a feeding cylinder. 2. The extension sleeve inside, the extension sleeve includes a soft tube 14 made of soft wear-resistant material on the inner layer, and an elastic support body 13 on the outer layer, and the elastic support body 13 is in contact with the rubber retaining ring 12 to realize dynamic seal.

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Abstract

The invention discloses a hollow shaft rotary sealing concrete mixing truck which comprises a mixing drum that is arranged on a truck body and can rotate relative to the truck body. A feeding cylinder is arranged in the middle of an outlet of the mixing drum. The hollow shaft rotary sealing concrete mixing truck further comprises a moving component which is arranged on the truck body and can move relative to the truck body; a sealing cover is arranged on the moving component through a rotary support; the external edge of the sealing cover is in contact with the external edge of the outlet of the mixing drum, and a first sealing device is arranged at the contact part; and the sealing cover, under the driving of the mixing drum, rotates relative to the moving component along with the mixing drum. The sealing cover for plugging the mixing drum is in a rotary structure and synchronously rotates along with the mixing drum, and a dynamic sealing part is changed to be positioned between the feeding cylinder and a feeding hopper accordingly, thus the rotating radius of the dynamic sealing part is reduced substantially, the relative linear velocity of the dynamic sealing part is reduced, the abrasion to a sealing component is reduced when the sealing effect is ensured, the reliability of the hollow shaft rotary sealing concrete mixing truck is improved, and the maintenance difficulty is lowered.

Description

technical field [0001] The invention relates to a concrete mixer truck, in particular to a concrete mixer truck with a hollow shaft rotary sealing mechanism. Background technique [0002] The sealing of the inlet and outlet of the concrete mixer truck is the development direction of the concrete mixer truck now and in the future, and it is essential to improve the quality of the building and realize safe and environmentally friendly production operations. The existing rotary sealing technology is mainly to seal the material inlet and outlet of the mixing drum. There are two types of sealing, one is radial seal and the other is end face seal. Since the rotary seal of the mixing drum is a rotary seal with a large diameter and a high relative linear velocity to the cement sand slurry, its wear is relatively large. The radial seal has the advantages of good sealing effect, high reliability, and large load-carrying capacity, but the existing problems are that the parts wear heav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C5/42
CPCB28C5/4262
Inventor 盛富春
Owner YANTAI SHENGLIDA ENG TECH
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