CS240692B1 - The drive mechanism of the rotary grate of the coal gasification generator - Google Patents

Abstract

Direct connection of the drive motor to the drive low-speed shaft of the gearbox. The gearbox is always firmly connected to the drive motor and, together with it, is suspended externally on the generator body by means of a connecting sleeve. The drive low-speed shaft of the gearbox passes through the sleeve, seal and plain bearing into the pressure lower part of the generator shaft; the pinion meshes with the gear ring and the high-speed shaft of the gearbox is connected to the output shaft of the drive motor. The drive motors are preferably hydraulic motors. When using multiple gearboxes, the pinions mesh with one gear ring of the rotating mushroom of the grate.

Description

(54) Driving mechanism (coal grate pressure generator turntable)

Direct connection of the drive motor to the drive of the low-speed gearbox shaft. The gearbox is always rigidly connected to the drive motor and, together with it, is hung outside the generator housing by means of a connection socket. The low-speed drive shaft of the gearbox extends through the throat, the gland and the plain bearing into the pressure lower part of the generator shaft; the pinion engages in the ring gear and the high-speed shaft of the gearbox is connected to the output shaft of the drive motor. The drive motors are preferably hydraulic motors. When using multiple gear boxes, the pinion gear engages a grate in a single toothed rim of the rotary mushroom.

(52) Int. Cl /

OJ C 10 J.3 / 42

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The invention relates to a drive mechanism of a rotary grate of a pressurized coal gasifier, wherein the rotary grate comprises a rotary bolt mounted on a bearing. The driving mechanism consists of a gear ring rigidly connected to a rotary bolt, at least one pinion disposed in the pressure lower part of the generator shaft. from at least one gearbox outside the generator housing and from the driving motor. The basic condition in solving the arrangement of the drive mechanism is to allow different thermal expansion of the generator body and the structure on which the drive mechanism is attached.

The driving mechanisms of the most commonly used rotary grates of the pressure generators for coal gasification are divided into two parts. The first part of the running grate is fixedly connected to the generator body. The second part comprises a drive motor, constant and variable gears and is connected to a steel structure.

Known drive mechanisms most often use chain drives. A common disadvantage of these processes is that forces are exerted from the chain tension which cause stresses on the gearbox, especially the shafts, which in turn strain the connection socket through which the gearbox is connected to the generator body.

In other known arrangements of the drive mechanism of the rotary grate of the pressure gasification generator for coal gasification, the chain transmission is replaced by a flexible connection which allows the necessary thermal expansion.

The disadvantage of this solution is that the coupling must have a special design and also require lubrication and maintenance.

The drawbacks of the known solutions are overcome by the rotary grate drive mechanism of the pressure gasifier for coal gasification, wherein the rotary grate consists of a rotary bolt mounted on a bearing 2 240 692 ku, and wherein the drive mechanism consists of a gear ring rigidly connected to the rotary bolt. parts of the shaft of the generator body and of at least one gearbox located outside the generator body and of the driving motor according to the invention. The principle of the invention is that in each case the gearbox is fixedly connected to the drive motor and is hinged to the generator body by means of a connection socket, whereby the drive low-speed shaft of the gearbox connects through the socket, gland and sliding bearing into the pressure lower part of the generator housing. , the pinion engages in the gear ring and the high-speed shaft of the gearbox is connected to the output shaft of the driving motor. The drive motors may preferably be hydraulic motors.

The rigid connection of the gearbox to the drive motor and its suspension on the generator housing by means of a throat will eliminate the problems resulting from the different thermal dilatation of the generator housing and the structure to which the drive mechanism is connected. The solution according to the invention achieves the complete elimination of all the additional forces that the chain drive otherwise causes. The use of complex expansion joints is also eliminated. By simplifying the drive, its weight is reduced with respect to the required output torque; this contributes to a longer device life.

The arrangement according to the invention makes it possible to make use of several gearboxes without difficulty, which by their pinion engage in one toothed rim of the rotary bolt of the grate. This ensures an evenly distributed driving torque across the pinion. There is no different wear of the individual drive components and the necessary speed control is ensured.

An exemplary embodiment of the invention is shown schematically in the drawing, which is a vertical section through a grate of a pressure generator with a two-drive arrangement.

In the pressure lower part of the shaft 1 of the generator, on the bearing 2 a grate consisting of a rotary bolt 3 and a fixed gear ring 4 is mounted,

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In this particular example, two sprockets 5 engage the gear ring 4. The drive low-speed shaft 6 of each pinion 5 passes through the plain bearing 7, the gland 8, and the connection socket 9 into the gearbox 10 where it is connected to its gears. The gearboxes 10 are located outside the generator body 11. The axles are rigidly connected to the drive motors 12 and, together with them, are hung on the generator body 11 by means of connecting ports 9. The output shaft of the drive motor 12 is always fixedly connected to the high-speed shaft 13 of the gearbox 10. □ sufficient controllability and synchronization of speed can be ensured.

The invention does not address the water stages used in the gearbox 10, but relates to the case of the direct connection of the drive motor 12 to the drive of the low speed shaft 6 of the gearbox 10, so that the housing

In another particular case, one or more drives are equally arranged.

Claims (1)

OBJECT OF THE INVENTION A drive mechanism of a rotary grate of a pressurized coal gasifier, wherein the rotary grate consists of a rotary bolt mounted on a bearing, and the drive mechanism comprises a toothed ring fixedly connected to the rotary bolt, at least one pinion disposed in the pressurized lower portion One transmission housing located outside the generator housing and at least one driving motor, characterized in that the transmission housing (10) is fixedly connected to the driving motor (12) and is hung therewith outside the generator housing (11) by means of a connection socket (9). ) »Wherein the drive low-speed shaft (6) of the gearbox (10) passes through the connection socket (9), the gland (8) and the plain bearing (7) into the pressure lower part of the generator shaft (1); 4) and the high-speed shaft (13) of the gearbox (10) is connected to the gearbox (10) the output shaft of the drive motor (12).