RU2253753C1 - Surface drive of submersible screw pump - Google Patents

Abstract

FIELD: general engineering; oil producing industry.

SUBSTANCE: proposed surface drive of submersible screw pump contains reduction gear with vertical input and output shafts, engine arranged on side surface of reduction gear housing and installed for displacement, torque transmission V-belt drive and brake device. Brake includes two spaces sealed relative to each other. One space filled with oil accommodates shaft of reduction gear with overrunning clutch fitted on. Second space non-filled with oil, accommodates friction device consisting of friction member and disk which serves simultaneously as body of overrunning clutch. Adjusting device acting onto friction member is provided to regulated brake torque.

EFFECT: improved reliability and efficiency of drive in operation, provision of stepless killing of reactive torque of rotating string with engine shut down, prevention of turning out of threaded joints.

4 cl, 5 dwg

Description

The invention relates to general engineering and can be used, for example, in the oil industry for oil production.

Known surface drive submersible screw pump containing a motor, a gearbox with a horizontal arrangement of shafts, brake and mechanical transmission of torque in the form of a gear pair (SU 998794, 02.23.1983, F 16 H 37/02).

The disadvantage of this drive is the design complexity, because the brake is installed on the shaft of the slip clutch, which does not meet the requirements for operating the drive of a submersible screw pump, and the gear pair does not protect the engine from overloads.

The closest technical solution is a surface drive of a submersible screw pump containing a motor, a gearbox with a vertical arrangement of the input and output shafts, the motor being located on the side surface of the gearbox housing with the possibility of movement along the housing. The mechanical transmission of torque is made in the form of a V-belt transmission, and the brake device is made in the form of an oil-filled housing with a shaft eccentrically located in it, which is rigidly connected to the gearbox shaft (RU 2145678 C1, 02.20.2000, F 04 B 47/02). This drive is selected as a prototype.

The disadvantage of this drive is the inability to quickly control the magnitude of the braking torque under various operating conditions of the drive, which leads to the flaps of the threaded connections of the column, and therefore, the reliability of the drive is reduced.

The technical problem to which the invention is directed is to increase the reliability and efficiency of the drive due to the operational regulation of the braking torque due to the friction force of the friction element and the disk, which provides smooth damping of the reactive moment of the rotational column when the engine is stopped, prevents the turn of its threaded joints.

This technical problem is solved due to the fact that in the surface drive of a submersible screw pump containing a gearbox with vertically arranged input and output shafts, a motor located on the side surface of the gearbox housing can be moved, V-belt transmission of torque and a brake device, unlike of the prototype, the brake device includes two cavities, sealed together, in one filled with oil, a gear shaft with an overrunning clutch located on it is placed in the second the cavity is not filled with oil, placed a friction device consisting of a friction element and a disk, which is also the body of the overrunning clutch, and to adjust the braking torque an adjustment device is provided that acts on the friction element.

In addition, the task is solved in that the friction element is stationary with the possibility of movement along the axis of the shaft of the gearbox.

The problem is also solved by the fact that the friction element is installed in the groove on the fixed cover.

In addition, an option is provided in which the friction element is movable so that it can rotate around the axis and move perpendicular to the axis of the shaft.

The proposed surface drive submersible screw pump is illustrated by drawings.

Figure 1 shows the appearance

figure 2 - section aa in figure 1 (when moving the friction element along the axis of the shaft of the gearbox),

figure 3 - section BB in figure 1 (when moving the friction element along the axis of the shaft of the gearbox),

figure 4 - section aa in figure 1 (when moving the friction element perpendicular to the axis of the shaft of the gearbox),

in Fig. 5, section B-B in Fig. 1 (when moving the friction element perpendicular to the axis of the gearbox shaft).

The drive contains (see Fig. 1, 2 and 3) a gearbox 1 with a vertical arrangement of shafts, an engine 2, a V-belt drive 3 and a brake device 4 on the shaft 5 of the gearbox 1, a cover 6 that seals the cavity without oil, a cover 7 that seals an oil-filled cavity in which the shaft 5 of the gearbox 1 is located, on which the overrunning clutch sits 8. In the cavity without oil there is a friction pair consisting of a friction element 9 installed in the groove of the cover 6, which can be moved along the axis of the shaft 5 of the gearbox 1 and the disk 11 The moment of friction with f iktsionnogo member 9 is transmitted to the cover 6 and further to the gear housing 1. The moment of friction in the friction pair can be adjusted using the adjusting device, e.g., an adjusting screw 13 with a spring 14 placed in the lid 6.

In another embodiment of the inventive device (see FIGS. 4 and 5), the friction pair consists of a movable friction element 15 mounted in a figured disk 17, and a fixed housing 16, and the friction torque is controlled by the adjusting screw 18 and spring 19.

When the engine 2 is turned on, the torque is transmitted through the V-belt drive 3 to the input shaft 5 of the gearbox 1 and through the output shaft and rotational column to the submersible screw pump. When the engine 2 is stopped, the reactive moment of the rotational column, caused by the spinning of the column during operation, starts to rotate the rotational column in the opposite direction and is transmitted through the output shaft to the input shaft 5 of the gearbox 1, and then through the overrunning clutch 8 and the disk 11 to the friction element 9 to the cover 6, where due to the friction forces there is a smooth damping of the reactive moment of the rotational column, and the availability of the ability to change the braking moment allows you to quickly adjust the braking moment of friction after COROLLARY screw 13 with a spring 14, which prevents flap threaded connections rotational column.

The proposed drive design allows to increase the reliability of the device and increase its efficiency by eliminating the lapels of the threaded joints of the rotational column and the operational formation of the magnitude of the braking friction moment.

Claims (4)

1. The surface drive of a submersible screw pump, comprising a gearbox with vertically arranged input and output shafts, a motor located on the side surface of the gearbox housing, movable, V-belt transmission of torque and a braking device, characterized in that the braking device includes two cavities, sealed between each other, in one, filled with oil, a gear shaft with an overrunning clutch mounted on it is installed, in a second cavity not filled with oil, it is placed in friction e device, consisting of a friction element and a disk, which is simultaneously the body of the freewheel, moreover, to adjust the braking torque, an adjustment device is provided that acts on the friction element. 2. The drive according to claim 1, characterized in that the friction element is stationary with the possibility of movement along the axis of the gearbox shaft. 3. The drive according to claim 2, characterized in that the friction element is installed in the groove on the fixed cover. 4. The drive according to claim 1, characterized in that the friction element is movable with the possibility of rotation around the axis and move perpendicular to the axis of the gearbox shaft.

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