RU190649U1 - Horizontal pumping unit with magnetic clutch - Google Patents

Abstract

Horizontal pumping unit (GNU) relates to the field of engineering, in particular to the design of centrifugal pumps used to maintain reservoir pressure in oil production by pumping process fluid into the reservoir. Horizontal pumping unit (GNU) is designed to inject fluid into wells to maintain reservoir pressure of oil wells and utilization of associated water. The GNU can be used both for individual injection, and as a cluster injection station. GNUs are also used as high-pressure booster pumping units. The GNU includes a drive motor connected to a horizontal pump by means of a magnetic coupling containing a leading external coupling half connected to an electric motor, a dividing screen and a driven internal coupling half inside the dividing screen kinematically connected to the driving shaft pump section. The kinematic coupling of the driven half coupling to the drive shaft of the pumping section is made in the form of a hollow spline output shaft with a central axial channel. The housing of the magnetic coupling is connected with the receiving chamber of the pumping unit through an adapter in which a splined output shaft with an axial support is placed on it through a sliding bearing. A circulation channel is formed between the outer surface of the driven half coupling and the inner surface of the separation screen.

Description

The technical field to which the utility model

The invention relates to the field of engineering, in particular to the design of centrifugal pumps used to maintain reservoir pressure during oil production by pumping process fluid into the reservoir.

Horizontal pumping unit (GNU) is designed to inject fluid into wells in order to maintain reservoir pressure of oil wells and utilize associated water. The GNU can be used both for individual injection, and as a cluster injection station. Also GNU are used as a booster pumping unit with a high pressure intake.

The level of technology

Known to GNU, equipped with a receiving chamber and a thrust assembly with a mechanical seal, which does not provide complete tightness and often fails. Also, the presence of a mechanical seal establishes a set of restrictions on the composition of the pumped liquid and environmental protection (see RF Patent 2320896, published March 27, 2008)

Known horizontal pump installation, which is closest to the described technical entity, including a drive motor connected to the pump through a magnetic coupling containing a leading outer coupling half connected to an electric motor, a dividing screen and placed inside the dividing screen a driven inner coupling half kinematically connected to the drive shaft pump section (see RF patent 52124, publ. 10.03.2006).

The disadvantage of this pumping unit is a constructive increase in the longitudinal dimensions of the drive of the pumping unit by placing an intermediate support sleeve between the housing of the magnetic coupling and the pump housing.

In addition, this placement of the support sleeve prevents circulation of the pumped liquid in the area of the magnetic coupling, which leads to a violation of the thermal mode of its operation.

Disclosure of utility model

The problem solved by the utility model is to increase the operational reliability of the horizontal pumping unit by improving the thermal mode of operation of the magnetic coupling, as well as reducing the overall dimensions of the magnetic drive unit, which allows it to be used in standard GNUs already used.

The magnetic drive is designed to transmit torque from the electric motor to the pump section, as well as to perceive and damp the axial load of the shaft created by the pressure difference in the suction cavity and in the discharge cavity of the pump section.

The magnetic drive ensures complete tightness of the installation of the GNU, which excludes the use of the stop chamber and the mechanical seal in the used serial installations. This allows the GNU to pump chemical, aggressive to the environment, explosive and flammable liquids and at the same time reduces the cost of repairing the GNU, since there is no need for periodic replacement of the mechanical seal.

The design feature of the described magnetic drive is its interchangeability with the standard GNU thrust chamber, which allows it to be installed on installations already in operation.

The technical result obtained in the implementation of the utility model is to increase the reliability of the installation and reduce labor costs during repairs and modernization of the used installations by replacing the GNU already used with GNU with a magnetic coupling.

This technical result is achieved by the fact that in a horizontal pumping installation, including a drive motor, kinematically connected to a horizontal pump by means of a magnetic coupling containing a drive outer coupling half connected to the motor, a separation screen and a driven inner coupling inside the separation screen that is kinematically connected to the drive shaft pump section. The kinematic coupling of the driven half coupling to the drive shaft of the pump section is made in the form of a hollow splined output shaft with a central axial channel, and the magnetic coupling housing is connected to the receiving chamber of the pump unit through an adapter in which a hollow spline output shaft with the axial bearing is placed on it through a sliding bearing . A circulation channel is formed between the outer surface of the driven half coupling and the inner surface of the separation screen, the inlet and outlet of which are hydraulically communicated with the cavity of the receiving chamber, the output being formed by the central axial channel of the output shaft and the radial outlet openings made in the movable part of the axial bearing.

Brief Description of the Drawings

The utility model is illustrated by one drawing (Fig. 1), which schematically shows the design of the drive with a magnetic coupling of a horizontal pumping unit.

Implementation of the utility model

The magnetic drive is designed to transmit torque from the electric motor to the pump section, as well as to perceive and damp the axial load of the shaft created by the pressure difference in the suction cavity and in the discharge cavity of the pump section.

The magnetic drive ensures complete tightness of the installation of the GNU, eliminates the need for the use of the stop chamber and the mechanical seal. This allows the GNU to pump chemical, aggressive to the environment, explosive liquids. The cost of repairing the GNU is reduced: there is no need for periodic replacement of the mechanical seal.

The design feature of the magnetic drive is its interchangeability with the standard GNU thrust chamber, which allows it to be installed on installations already in operation.

The torque from the motor (not shown in the figure) is transmitted to the shaft of the bearing unit 1, on which the outer magnetic coupling half is fixed. During rotation, a magnetic field arises between the outer magnetic coupling half 2 and the inner magnetic coupling half 3, mounted on an axial support 4. which passes through the separation screen 5, and drives the internal magnetic coupling half 3. Next, the torque is transmitted to the shaft 6 of the internal coupling half. Both coupling halves 2, 3 and the separation screen 5 are placed in the outer case 7, while the inner magnetic coupling half 3 is mounted on the shaft 6 by means of a plain bearing 8. The output end of the shaft 6 is connected to the shaft of the pump section by means of a spline coupling 9 placed in the receiving chamber 10 11. Sealing the cavity of the outer coupling half 2 is provided by an adapter 12 installed between the outer housing 7 and the receiving chamber 10.

The drive is cooled by circulating the pumped medium through the circulation channel, the inlet and outlet of which are hydraulically communicated with the cavity of the receiving chamber. The fluid through the holes 13 in the adapter 12 enters the separation screen 5, then passes through the central hole of the shaft 6 of the inner coupling half, and is ejected back into the receiving chamber through the radial holes in the axial bearing housing, due to centrifugal forces. The movement of fluid in the figure is indicated by arrows.

Claims (1)

Horizontal pump installation, including a drive motor connected to a horizontal pump by means of a magnetic coupling containing a leading external coupling half connected to an electric motor, a separating screen and a driven semi-coupling located inside the separation screen, kinematically connected to the drive shaft of the pump section, characterized in that the kinematic coupling driven half coupling with the drive shaft of the pumping section is made in the form of a hollow spline output shaft with a central axial channel The housing of the magnetic coupling is connected to the receiving chamber of the pumping unit through an adapter in which a splined output shaft with an axial support is placed by means of a sliding bearing, with a circulation channel between the outer surface of the driven coupling half and the inner surface of the separation screen, the input and output of which are communicated with a cavity of the receiving chamber, the output being formed by a central axial channel of the output shaft and radial outlet openings made in the movable part of the axial pores.

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