SU808679A1 - Device for starting an i.c.engine - Google Patents

Description

washer, driven in rotation from the crankshaft of the engine.

The pressure switch 7 communicates with the cylinder, the first in the order of operation from the position of the locked crankshaft, via the compressed air supply line 3 and the starting valve 1 of this cylinder, and in general, the connection of the relay 7 to the line 3 can be made at any part of it between the main the starting valve 4 and the starting valve 1. However, it is most efficient and technically expedient to connect the relay 7 to the section 8 of the line 3, which is enclosed between the air distributor 5 and the starting valve 1. So in this case, the relay 7 is connected EHO to the portion 8 by means of conduit 9.

In turn, the source 2 of compressed air is connected to the relay 7 through the valve 10 by means of a pipe 11.

The pressure switch 7 consists of body 12 and cover 13, in pacTO4Ketx of which a stepped slide 14 is mounted, pressed against the cover 13 by a spring 15, the spring 15 tightening, which determines the response pressure of the relay 7, is adjusted by a screw 16. In the case of installation of a reduced gear in the device the adjustment of the relay 7 must be made taking into account the reduced pressure.

The relay 7 is provided with a cavity 17, the image of the aperture of the spool 14 and the ratochka in the lid 13 and the black channel 18 in the lid 13 with the pipeline 11, the cavity 19 formed by the butt of the spool 14 and the bore in the housing 12 and communicated through the channel 20 in the housing 12 pipeline 9, a cavity 21 formed by the end of a step of a larger diameter of the spool 14 and a bore in the housing 12 and communicated through the channel 22 in the housing 12 and the pipeline 23 with the line 3 in its section between the main starting valve 4 and the air distributor, 5.

.zlotnik, 14 is made with the controller on the Coms 24-26 and groove 27.

In enclosure 12, a kaNssha 28–30 is also made, with channel 28 communicating with the atmosphere, channel 29 through pipelines | The VRD 31 is connected to the power chamber 32 of the stopper b of the crankshaft of the engine, and the channel 30 is connected to the pipeline 11 by a pipeline 33.

The stopper 6 of the crankshaft of the engine is made in the form of a pneumatic cylinder consisting of a housing 34 in which a piston 35 with a rod 36 is mounted. The piston 35 is pressed against the Koprtycy 34 by a spring 37.

The stopper 6 of the crankshaft of the engine can also be made

for example, in the form of a brake or clutch, controlled pneumatically, hydraulically or electrically.

The stopper 6 is mounted on the engine core so that the axis of the rod 36 is perpendicular to the axis of one of the parts 38, driven by the crankshaft. The part 38 has a radial hole 39, which, when the piston is first installed

the order of operation of the cylinder in the starting position is located coaxially with the rod 36 of the pneumatic cylinder.

A microswitch 40 is mounted on the body 34 of the pneumatic cylinder, which is connected to a light-signal lamp 41.

06 implementation of the locking of the crankshaft.

The device works as follows.

0 Before starting the engine, the piston in the first in order of operation of the cylinder is installed in the starting position near the top dead center by turning the engine crankshaft

5 with the aid of rolling means known for this purpose. At the same time, the air distributor 5 must connect the line 3 with its section 8.

Q When the engine is started, the valve 10 is opened. Compressed air from the source 2 through the valve 10 through the pipeline 11 and the channel 18 enters the cavity 17 of the relay 7 and through the pipeline 33 into

with channel 30 blocked by the control

26. Under the influence of compressed air in the cavity 17, the spool 14, compressing the spring 15, moves to the extreme right position. At the same time, the control juice of the spool 24

0 14 divides the connection of the channel 22 with the cavity 21, the control of juice 25 divides the connection of the channels 28 and 29, and the groove 27 reports the channels 29 and 30. Compressed air from the channel 30 enters

5 through the groove 27 and Kanaet 29 through the pipeline 31 into the power chamber 32 of the pneumatic cylinder. Under the action of compressed air, the piston 35 of the pneumatic cylinder, compressing the spring 37, moves

Q to the right and inserts the rod 36 into the hole 39 of the part 38 connected to the crankshaft. Thus, the articulated All the stopper. This is signaled by a light bulb 41.

After that, open the main starting valve 4. Compressed air from the source 2 through line 3 through the main starting valve 4, the air distributor 5 and the starting valve 1 enters the piston cylinder over the piston.

0 Simultaneously, the compressed air through the pipeline 23 enters the channel 22 of the relay

Claims (2)

7 and through conduit 9 through channel 20 into cavity 19. As the cylinder overpiston space of the cylinder is filled with compressed air, the air flow rate drops, and the air pressure in pipeline 9 and cavity 19 increases. The operation of the pressure switch 7 is based on a comparison of pressures in cavities 17 and 19, i.e. pressures in the compressed air source 2 and in the overhead space of the cylinder. When the pressure in cavity 19 approaches the pressure in cavity 17, the spool 14 moves to the left under the action of Spring 15 and the canal 22 is connected to the cavity 21. When this is compressed air through line 23 through the channel 22 enters the cavity 21 and moves the spool 14 to the extreme left position, with the result that the power chamber 32 through the pipe 31, the channel 29, the groove 27 and the crane 28 is connected with the atmosphere, the piston 35 with the rod 36 under the action of the spring 37 moves to the original position removed stoporonie crank shaft of the engine. After this, compressed air, the pressure of which has reached the maximum possible value, spins the crankshaft and starts the engine. After starting the engine and disconnecting the starting valves 1, the compressed air in the connecting pipe is vented to the atmosphere and the device returns to its original state. Thus, the introduction of a crankshaft stopper and an air pressure switch into the device improves the reliability of engine start. The formula of izbrebeni 1.The device for starting the internal combustion engine, containing starting valves installed in the engine cylinders and communicated with a source of compressed air through the latter supply line through the main starting valve and distributor kinematically connected to the crankshaft (a4 engine shaft, characterized by that, in order to increase the reliability of the launch, the device is additionally equipped with a crankshaft stop and an air pressure switch, the stop being driven by a source of compressed air through the pressure switch, and the latter with the cylinder, the first in the order of work from the position of the locked crankshaft, through the compressed air supply line and the cylinder starting valve. 2. The device according to claim 1, wherein the pressure switch is connected to a section of the pipeline between the air distributor and the cylinder starting valve. Sources of information taken into account in the examination 1. USSR author's certificate 492676, cl. F 02 N 9/04, 1973.. yy one 2t g5 P 30 eleven  " .