SU427192A1 - TRANSFER FOR TRANSFORMATION OF ROTATIONAL MOVEMENT - Google Patents

Description

one

Piston pumping units for operating wells with gear for converting rotational motion associated with drive shaft drive motor into continuous reciprocating non-displacement of the actuator, known as a submersible pump piston permanently coupled to the output shaft of the transmission gear with an additional gear, are known for example, a screw is a nut.

A disadvantage of the known devices is the imperfection of the design of the assembly for reversing the movement of the above-mentioned transmission.

The proposed transmission differs from those known in that two gear sectors are fixed on the drive shaft with a circumferential displacement for alternately engaging one of them with a gear mounted on the WAVE transmission shaft and the other with an intermediate gear permanently engaged with the gear of the output shaft. on the axis in the transmission housing.

This allows reversal of its movement.

FIG. 1 shows an installation for operating a well, a general view; on fng. 2 - reducing gear, longitudinal section; in fig. 3 - distribution gearbox, section along A-A in FIG. four; in fig. 4 - distribution gearbox, section along BB in FIG. 3; on phpg. 5 - a raising reducer, a horizontally section; pas figs. 6 - pump, longitudinal section.

The well operation stop consists of a submersible electric motor 2 with a gear box 3 and a pump 4 descended on tubing pipes 1. The electric power is supplied to the motor through a current lead 5. The gear box 3 consists of a reduction, distribution and aft gearboxes.

The lowering gearbox contains a system of gear stages, each of which has a pair of gears 6 and 7 of the internal gearing, which are located in the gearbox housing 8. The gearbox itself is located directly above the submersible electric motor 2, and the rotation from the shaft of the latter is transmitted to it through the coupling 9.

The raising reducer (see Fig. T) is, according to the device and principle of operation, equivalent to decreasing with the only difference that here the number of digits increases.

The distribution gearbox (see Figs. 3, 4) is designed to periodically change the direction of rotation and consists of a drive 10, an intermediate 11 and a driven g /, shafts assembled in the housing 13. The drive shaft 1 and receives rotation from the reduction gear through gear 14. On the drive shaft is sequentially and offset from it along an arc of almost 90 ° two gear sectors 15 and 16 (each arc length is close to 180 °) are fitted, which alternately engage: the lower 15 - with sixteen gears on the shaft 12 and top 16 - with gear 18 on intermediate P. shaft Toothed sector 15 forehand is directly driven rotating shaft 12, and the direction of rotation is opposite to its own. The rotation of the toothed sector 16. Is transmitted to the driven shaft 12 via the intermediate gear 18, which constantly engages with the gear 19 of the driven shaft, i.e. in this case, the driven shaft receives rotation in the same direction as the drive shaft 10. Thus, With the help of the gear sectors 15, 16, the rotational direction of the output shaft 12 of the distribution gearbox is periodically changed. A randomly-periodical change in the direction of rotation is transmitted through gear 20 to a step-up gearbox, where the speed is increased to the required speed, and further to screw 21 of pump 4, which is rigidly connected to the output shaft of the step-up gearbox (By means of clutch 22. The reduction in speed of the motor 2 is necessary by means of a step-down gearbox to reduce the number of strokes of the piston system 23, i.e., to reduce the dynamic loads and increase the durability of the pump 4 operation. Increasing the number of revolutions by means of the neo reduction gearbox It is necessary to increase the stroke length of the piston system 23, which results in an increase in the performance of pump 4. In the presence of a low-speed electric motor with a speed of 10-20 V / min (taking into account the possibility of reducing the number of revolutions electrically), there is no need for a reduction gearbox. Any of the existing types of submersible electric motors can be used as a drive, but low-speed submersible electric motors with a speed of about 100 or less are preferred. Using an eccentric arrangement of the pump and gearbox insert in the well, the electrical power supply (see Fig. 1) is placed in the maximum gap between them and the walls of the well. The movable piston system 23 (see Fig. 6) receives a reciprocating motion through the screw gear 21, 24. The stroke length of the piston system 23 depends only on the transmission gear ratio of the boost gearbox and the characteristics of the screw gear 21, 24, i.e. for a particular design pump 4 is a constant, unregulated value. The number of strokes of the system 23 also depends on the number of revolutions of the electric motor 2 and the reduction ratio of the reduction gearbox. Since the number of revolutions of the electric motor can be regulated electrically, over a wide range, the number of strokes will be adjustable. Consequently, the pump capacity, which is directly dependent on the aforementioned value, can be controlled by varying the engine speed. The subject matter of the invention is to transfer, in order to convert the rotational movement of the drive shaft connected to the drive motor, to continuous reciprocating movement of the working member, for example, the piston of a submersible pump, which is permanently connected to the output shaft of the transmission, by means of an additional gear, such as a screw nut, that, in order to carry out the reversal of its movement, two gear sectors are fixed on the drive shaft with a circumferential offset to alternately engage one of its gears, anovlennoy on the output shaft of the transmission, and another - with permanently meshed with the gear output shaft of the intermediate gear mounted on an axis in a transmission casing.

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