SU60726A1 - Piston air pump for locomotives - Google Patents

Description

Known piston air pumps for locomotives, acting, not from the drive, its engine mechanism.

In the proposed pump of this kind, the piston rod is connected directly to the crosshead, and the cylinder is freely suspended by its hollow trunnions to the frame of the locomotive.

FIG. 1 shows a vertical parallel to the axis of the locomotive section of a pump mounted on the engine frame; in fig. 2 - top view of the pump; in fig. 3 - vertical perpendicular to the axis of a locomotive pump slit; in fig. 4 is a vertical section of the discharge valve; in fig. 5 is a vertical section of the suction valve and clan. On the regulator.

The proposed pump is designed for installation on E-series commercial steam locomotives in addition to the steam-air tandem pump that is sourced on the steam locomotive; it is driven from the crosshead of a locomotive machine. A bracket / (figs. 1 and 3) is fixed on the crosshead cap, carrying axle 2, which is drilled to facilitate weight. Axle 2 is fitted with a piston rod 5 plug fitted with bronze bushings. The stem is bolted four with a flange of a cavity 4 equipped with holes for better ventilation and cooling of the space inside the piston. The piston has three sealing piston rings 5, and to increase the lateral support surface, it is provided with an upper skirt 6, which enters the corresponding recess in the cylinder 7. The bottom of the piston is reinforced by four ribs.

The cylinder is equipped with two stiffening ribs and six thin ribs to enhance heat transfer. In the cylinder head, along the axis, the discharge valve 8 (Fig. 4) is placed in a conventional construction, and on the side, in the poured chamber 9 (Fig. 5), is the suction valve 10, and below it is the L regulator valve. The suction and discharge valves with their conical sharpening of the garden vehicle for the cones of saddles 12 w. 13 and springs 14 and 15 are pressed to them. The cylinder has removable steel trunnions: an outer 16 and an inner 17 (Fig. 4). With their chiseled ends, they fit snugly into the cylinder bores and are attached to it with flanges with bolts. On these axles, the cylinder can swing in the bronze bushings 18 steel hangers 19. The latter are attached to the brackets 20, bent so that they can be bolted to the frame between the steam locomotive.

The polished end of the internal pin 17 of the cylinder is included in the bronze bushing 21 of the nozzle 22; An oil seal with a push sleeve 23 and a gasket 24 is intended for sealing.

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The pipe 22 is suspended from the W-vellers by the bracket 25 and connected with a flange to the pipe 26. The branch from this pipe through the non-return valve leads to the air reservoir.

On the suction valve at the bottom there is a process 27 (Fig. 5) into which the spindle 28 of the regulator valve can abut. A spring 29 presses the regulator valve on top, and compressed air from a blower, a tube, presses the compressed air from below. The piston of the regulator is made of bronze and sealed with three bronze piston rings. The spring is adjusted so that the 1 "1 pan-piston can rise only when the pressure in the discharge pipe exceeds a certain amount, slightly less than the pressure at which the system safety valve opens. Raising, the regulator piston depresses the spring 29, raises the suction valve and leaves it open until the pressure in the air tank decreases. When the suction valve is open, the cylinder piston does not compress the air, but only sucks it out of the atmosphere and pushes it back through the suction valve.

When the pressure in the discharge pipe decreases, the piston under pressure of the spring 29 will lower, the suction valve with the parts on its seat, and the supply of compressed air to the main reservoir will resume.

A tandem pump works under the steam in the engine, compensating for air leakage through leaks and maintaining a constant pressure in the brake system of the composition. In the course of a locomotive, the described pumps operate on its both sides, swinging on hollow trunnions 16 and 17 about axis 30 {FIG. one). A tandem pump is used to help these additional pumps only with an unusually large air flow on tight and strong slopes or in the event of a system malfunction when it is difficult to repair the air leak.

Subject invention

A piston air pump for locomotives, operating from a crosshead, characterized in that the piston rod is connected directly to the crosshead, and the cylinder is freely suspended by hollow trunnions to the frame of the locomotive.

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