SU121899A1 - Device for driving gas-oil burner - Google Patents

Description

In the known devices for driving gas-oil burners installed on large boiler-turbine blocks and containing a gas supply valve, an air register and a reversible electric motor with limit switches for controlling the valve rods, the register and the nozzle, the drive does not have sufficient compactness, reliability and economy.

The features of the proposed device for driving oil and gas burners are as follows.

A worm gear reducer is used to transmit motion from the electric motor to the valve, register and nozzle barriers, the wheel of which is mounted on a threaded bushing, which directly returns the register rod to the rod and valve nozzles through a system of three engaging gears, each which are freely mounted on the corresponding threaded sleeve.

The two side gears are fitted with clutch half couplings, with each of which engages corresponding counter coupling half, which freely move along their threaded bushings under the action of electromagnets.

The burner uses a spool mechanism to control the flow of purge steam and fuel oil to the nozzle.

Instead of the spool mechanism, twin valves (steam and fuel oil) are used, controlled by a lever-hinge mechanism and a distribution cam mounted on the injector rod.

Such an embodiment of the device makes it possible to automate the operation of large boiler and gas turbine blocks operating on gas and fuel oil and to ensure reliable and economical operation of the drive.

No. 121899-2 -

FIG. 1 schematically shows a general view of a device for driving a gas-oil burner with a spool-type mechanism; in fig. 2 - the same in the plan; in fig. 3 - kinematic diagram of the device; in fig. 4 - actuator with twin valves (steam and fuel oil), general view.

A reversible electric motor 1 (Figs. 1, 2, 3) through the clutch 2 transfers the rotation to the shaft and the screw 4 sitting on it, rotating the worm gear 5, on which the threaded sleeve 6 is mounted. When the sleeve 6 rotates, the rod 7 progressively moves inside it having a specific length of thread. The rod 7 is connected to the disk 8 of the register guide 9. On the threaded bushing 6 there is placed a brush 10, which is in permanent engagement with two other bristles, which freely rotate on their threaded bushings 12. These two additional bristles 11 are connected with gear coupling half coupling 13, with each one engaging the corresponding counter coupling half 14, freely moving along its threaded sleeve 12 from the action of its electromagnet 15 through the lever 16. Inside the additional threaded bushings 12, the corresponding shtanga - rod 17 is progressively displaced and or closing the gas valve 18 through the lever 19 and the rod 20 through a series of links for the accessory movement of the nozzle 21. The rod 20 of the nozzle 21 simultaneously serves as a piston rod 22, which moves when the rod 20 moves inside the spool box 23. There is a central valve 22 a hole 24 with an annular recess 25. When moving the ground 22, an annular recess 25 successively passes through the apertures of the connector 26 for supplying steam and the connector 27, for supplying fuel oil in the spool box 23. To limit the progress of the rod 7, 17 and 20, end switches 28 and 29.

In another embodiment of the device for driving a gas-oil burner (Fig. 4), two coupled valves are provided: steam 30 and fuel oil 31. When moving forward, the bar 20, on which the fuel oil nozzle 21 is fixed, the sleeve 32 fixedly mounted on the bar 20, presses during its movement to the lever 33 of the steam valve 30, which, at the moment of pressing, passes the purge steam through the fuel oil valve 31 and the nozzle 21. With further movement of the sleeve 32, the steam valve 30 closes and the fuel oil valve 31 opens. At the same time, the fuel oil nozzle comes to the extreme forward position. The valve 31 is in the open position for the entire duration of the burner operation on fuel oil.

Subject invention

Claims (4)

1. A device for driving a gas-oil burner containing a gas supply valve, an air register with a guide vane disk and a reversible electric motor with limit switches for controlling the valve rods, the register and the nozzle, in order to automate the operation of the burner for transmission From the electric motor to the said shtangs, a gearbox with a worm gear is used, the wheel of which is mounted on a threaded bushing, indicating the reciprocating movement of the register shtanga directly, and m injector valve and through a system of three meshing gears, each of which is freely fitted onto a threaded bushing. 2. The device according to claim 1, characterized in that, for the purpose of remote control of the burner, the two side gears are equipped with coupling half couplings, with each of which engages corresponding counter coupling half, freely moving along their threaded bushings under the action of electromagnets. 3. In a gas-oil burner equipped with a drive according to claim 1, the use of a spool mechanism for controlling the supply of purge steam and fuel oil to the nozzle. - g t-j j 4. Videoprocessing of the device according to claim 3, characterized in that instead of the spool mechanism, coupled valves (steam and fuel oil) are used, controlled by a lever-hinge mechanism and a distribution cam mounted on the nozzle bar