Classification way of walking
Bulldozers can be divided into two types: crawler type and tire type. The crawler bulldozer has large adhesion and traction, small grounding specific pressure (0.04-0.13MPa), strong climbing ability, but low driving speed. The tire-type bulldozer has high driving speed, flexible maneuverability, short operation cycle time, convenient transportation and transfer, but small traction force, which is suitable for the situation where the construction site and field work need to be changed frequently.
By use
It can be divided into general type and special type. The general-purpose type is a model produced according to the standard, and is widely used in earthwork engineering. The special type is used in specific working conditions, including wetland bulldozers and swamp bulldozers, amphibious bulldozers, underwater bulldozers, cabin bulldozers, unmanned bulldozers, plateau and high Bulldozers operating in wet conditions, etc.
Introduction
Mainly are general-purpose bulldozers, wetland-type bulldozers and bulldozers adapted to the western development of the plateau type. After more than 20 years of steady development, my country’s bulldozer industry has formed from 59kW (80 horsepower, Shantui SD08 bulldozer, in the 5.12 Wenchuan earthquake, the Russian Mi-26 helicopter was lifted to the construction site) to 309kW (420 horsepower, The SD42 bulldozer developed for Shantui is mainly exported to Russia. In 2009, Shantui included the 520-horsepower bulldozer into the scientific research plan) a complete product series, which has been successfully developed so far.
Moreover, there are also variants of products with different configuration modules according to the needs of different operating conditions, which basically meet the needs of domestic earthwork engineering for bulldozer products. In addition, Shantui’s various types of machinery, mainly bulldozers, are also continuously exported to foreign countries. It has been exported to 103 countries and regions, opening up the international market.
structure and work
Bulldozers are a main type of earthmoving machinery. They are divided into two types: crawler type and tire type. Because there are fewer tire type bulldozers. This article mainly describes the structure and working principle of the crawler bulldozer. The basic operations of bulldozer excavation are: A. Shoveling B. Moving soil C. Unloading.
Most of the crawler bulldozers with a power greater than 120KW use hydraulic-mechanical transmission. This type of bulldozer comes from the three basic types of bulldozer manufacturing technology, D155, D85 and D65 introduced by Komatsu, Japan. After localization, it is finalized as TY320, TY220 and TY160 basic bulldozers.
In order to meet the needs of users in various working conditions, my country’s bulldozer manufacturers have expanded their product varieties and formed three series of bulldozers on the basis of the above three basic bulldozers. TY220 bulldozer series products include TSY220 wetland bulldozer, TMY220 desert bulldozer, TYG220 plateau bulldozer, TY220F forest logging bulldozer, TSY220H sanitation bulldozer and DG45 pipelayer, etc. The TY320 and TY160 series bulldozers are also expanding similar series products. In the TY160 series, there are TSY160L ultra-wet bulldozers and TBY160 pushers.
The development and expansion of the types of bulldozers must not only meet the work adaptability of different working conditions, but also maintain the maximum versatility (or interchangeability) of parts and components with the basic type, which brings great benefits to the use and maintenance of the majority of users. Great convenience. In order to facilitate users to purchase accessories, the manufacturers have retained the part numbers of Komatsu Corporation of Japan, and only the parts designed by themselves in the modification are named with their own manufacturer’s number.
Crawler bulldozer is mainly composed of engine, transmission system, working device, electrical part, cab and hood. Among them, the mechanical and hydraulic transmission system also includes hydraulic torque converter, coupling assembly, planetary gear power shift transmission, central transmission, steering clutch and steering brake, final drive and travel system.
The power take-off mechanism drives the working pump in the hydraulic system of the working device, the speed change pump of the variable torque variable hydraulic system, and the steering pump of the steering brake hydraulic system by means of gear transmission and spline connection; the sprocket represents the final drive mechanism of the secondary spur gear transmission (including left and right final drive assemblies); crawler shoes include the crawler assembly, trolley frame and suspension assembly including the walking system.
Post time: Sep-24-2022
