Bringing the speed of tankers to the level of the ship "Lenin"

In addition to the design changes of the fuel equipment as the main unit affecting the power developed by the engine, special attention was paid to the issues of fuel preparation. They introduced its mandatory separation, set up fuel heating directly in front of the engine to 60–70 ° С. These measures also lengthened the stability of the injectors and reduced the specific fuel consumption by 2-3 g / l. with. hours

In practice, for fuel equipment (according to data processed by heating engineers in 1956 and verified in operation) during navigation in 1957, the following values ​​were adopted: the clamp of the injector springs is adjusted to Pf = 220-265 kg / cm2; the pressure in the gas pushers Ргт = 45–46 kg / cm2, nozzles with the number of holes 10 at a diameter of each 0.4 mm, spray angle 156 °. These values ​​were legalized in practice, the operation of the 6KTs-54/90 engine at 30 rpm became vital. Over time, this regime was gradually entrenched on tankers of the Lenin type.

In the future, we again revised the elements of the propeller and designed the propeller for a new speed regime. Its diameter is 3640 mm, the pitch is 3200 mm, the number of blades is 3. The evolution of the selection of screws is given in the documentation.

When translating engines to work with revolutions of more than 130 per minute, we met with significant difficulties. The main ones were increased temperature conditions and, as a consequence of this, failure of the piston heads. The temperature of the exhaust gases has risen. There were cases of cracks in the piston heads - on the upper bottom and along the groove of the first compression ring. In fig. Figure 5 shows one of many cases of detachment of the bottom of the piston. The photograph shows the rubbing from the abutting edges of the labyrinths due to insufficient clearance for thermal expansion. The analysis of these phenomena required a further change in the operating mode of the gas pusher and some adjustments to the assembly standards for the assembly of piston heads. So, if previously the heads were assembled with a gap for expansion between the liner and the head body within 0.25 mm, then in the future the gap was increased to 0.50-0.70 mm.

Having achieved stable operation of the engines at a speed of 130 rpm, the engineering and technical workers of the shipping company, together with the sailors, switched to the development of the regime at 150 rpm. The results of this are shown in the table.

Now the engineering and technical workers of the shipping company - the coast and the fleet are trying to bring the speed of all tankers to the level reached by the ship "Lenin".

Now it is extremely important to pay serious attention to the culture of manufacturing technology for critical parts. Accidents and failure of parts due to the low quality of their manufacture should be completely excluded. It is also necessary to revise the elements of the propellers in the direction of clarifying their compliance with the economic indicators of the use of the capacities of the main power plants. Finally, it is necessary to achieve the restructuring of the work on their manufacture, to improve the shape of the blades, the purity of processing, which will increase their propulsive qualities. This site was created to make it as easy as possible to browse all the best cam models. Join the best porno cams collection 2020 and watch free private porn records or Free Live Sex Cams Watch webcam porn videos for free online. Open a Free Account and enjoy the exclusive shows we offer plus registration is completely free! You don't even have to use your email address, only if you want to keep updated with your favorite Cam Models.