Because most enterprises in our country have been using the double drum type chassis dynamometer,designing tyre rolling resistance measuring system in double drum type dynamometer will lay a foundation for a table type tyre rolling resistance characteristic research.
Measuring tyre rolling resistance on a double drum type test bench can be realized by using a reverse drawing method,the measuring system of rolling resistance is reformed by a double drum type chassis dynamometer.
The characteristic and operation problems of double drum filter for calcium nitrate are examined, the filter is proved efficient in nitrophosphate production and some problems and their countermeasures are presented.
This system can easily and quickly conduct the seven kind roller design drawing of round pipe, square pipe, rectangle pipe, elliptic pipe, plane elliptic pipe, drum shape pipe, double drum shape pipe etc.
This paper introduces the study work on developing separate combination method of precision die forging tooling for camion large scale double drum shape aluminum hub, breaking through the confine of largest parallel projection plan parting die,solving the die forging deformation process for double drum shape forging,performing preusion 80000kN die forging on electric screw press to ensure deformation accuracy of products.
In order to open up a new realm for the utilization of lignite,the authorhas designed a double drum,natural circulation water-tube boiler with economizer,air preheater and transversely positioned reciprocating grate bars.
The paper explains the option of the boiler type and describes the combustion facility as considered in the design of a 58MW hot water boiler, as well as problems met with in the furnace arrangement and the fluid flow design etc. The paper furthermore airs the view that a hot water boiler of such a capacity should be a double drum natural circulation boiler equipped with travelling grate spreader stoker firing.