SU167403A1 - PNEUMATIC REMOTE SYSTEM - Google Patents

Description

Pneumatic systems of remote automated control of shipboard reversing internal combustion engines are known, comprising a camshaft articulated by a mechanical gear with a remote control handle from the wheelhouse and acting on reverse valves connected to the starting cylinders. From the latter, low-pressure compressed air is supplied to a servomotor, which is sludge for shifting the camshaft, which is mechanically connected to a check valve connected to the relief valve and the starting spool. The spool controls the main starting valve, which, when opened, supplies high-pressure compressed air to the starting valves and the control relay acting on the rail of the fuel pumps.

However, in known systems, not all processes are automated (for example, starting the engine). The reversal process is long (up to 10 minutes) and in control, it requires a multi-stage movement of the control knob and holding it in the "stop" position.

The proposed system as a result of the elimination of these drawbacks is more reliable in operation. This is achieved by the fact that the control relay is made in the form of a spool having a spring-loaded lever at the front end connected to the engine regulator.

The spool is installed in the cylinder with an internal bypass valve and a mechanism acting on the rail of the fuel pumps.

The mechanism that acts on the rail of the fuel pumps is a pneumatic servo motor, the piston rod of which acts on the latch rod, which moves the rail when released from the latch in the direction of increasing the fuel supply and activating the shut-off valve.

The drawing shows a schematic diagram of the pneumatic system.

The system contains a cam shaft 1, articulated by a mechanical transmission with a handle.

remote control (not shown), reverse valves 2 and connected to the starting cylinders 4 through a shut-off device 5, a servomotor 6, used for shifting the camshaft,

mechanically connected with the changeover valve 7 connected to the relief valve 8 and the starting spool I of the control valve 10, acting on the rail of the fuel pump and the main starting valve //.

When moving the control knob from the position of the "moan to the position", the camshaft rotates forward /, opening the valve of the reverse 5. Air from the cylinders 4 through the shut-off device 5 and the open valve of the reverse 3

It pushes oil from it into the servomotor 6. The servomotor moves the camshaft to the work position for forward travel (if the engine previously worked in reverse).

By the end of the reverse, the engine camshaft gives impetus to the opening of valve 13. From the clanan / 5, the air moves valve 7, flows to the relief valve 8 and the starting spool 9. The starting spool reports the upper cavity of the main starting valve // with the atmosphere, the pressure above the piston drops , and the main starting valve opens air access to the starting highway of the engine. At the same time, air enters control relay 10.

With the start of rotation of the motor shaft, the controller 14 raises the lever 15 of the control relay and the spool 16, together with the engine starting line with the cylinder 17 of the shut-off device 5.

The pusher of the cylinder 17 knocks down the latch / 5 and releases the 19 rails of the fuel pumps, which under the influence of the spring (not shown) moves in the direction of increasing the supply, while the ha 19 pulls the lever 20 away from the shut-off valve 21, the air supply to the valves 2 and 5 and together with the atmosphere through the gutter holes.

When the pressure in the system piping in the relief valve 8 is opened, the discharge openings are opened, the starting spool 9 is lowered, causing the main starting valve 11 to close rapidly. device. When the adjustment knob is moved from the "forward to the position" position, the reverse valve 3 is closed back and the valve 2 is opened.

At the moment of transition of the stop zone, the ha of the 19 rails of the fuel pumps is set to zero flow using an eccentric washer 22, while the ha of the 19 through the lever 20 opens the shut-off valve 21, which is held open with the thrust latch 18.

After opening the shut-off valve 21, the operation of the system is similar to that described for forward travel.

With the opening of the main starting valve // starting air, entering the cylinders, stops the engine and starts it in the opposite direction.

Subject invention

Claims (2)

1. A pneumatic system of remote automated control of a ship's reversible internal combustion engine, including a cam shaft articulated by a mechanical gear with a remote control handle from the wheelhouse and acting on the connected with the starting reversing valves from cylinders, from which low-pressure compressed air is supplied to a servomotor, which is used for shifting a camshaft mechanically connected with a change-over valve connected to the relief valve and the starting spool controlling the main starting valve, when opened, which high pressure compressed air is supplied to the starting valves and the control relay acting on the rail fuel pumps, characterized in that, in order to increase the reliability of operation, the control relay is made in the form of a spool having a spring-loaded lever at the front end connected to an engine regulator, and installed in a cylinder with an internal bypass channel connected by pipelines with the main starting valve and a mechanism acting on the rail of the fuel pumps. 2. The system according to claim 1, characterized in that the mechanism acting on the rail cuts of the fuel pumps is made in the form of a pneumatic servomotor, whose piston shaft acts on the thrust latch that moves the rail when released from the latch in the direction of increasing the fuel supply and actuating shut-off valve.