RU34656U1 - VERTICAL Borehole Centrifugal Pump Drive - Google Patents

Description

Object-device Vertical borehole centrifugal pump drive

The proposal relates to the field of pump engineering, in particular to vertical drives of borehole pumps, and is intended for pumping industrial water into the reservoir during oil production.

A well-known drive of a borehole submersible screw pump, including a support unit, a gearbox, an electric motor, a stand, a fountain armature with a sealing unit, a V-belt drive, a drive rod, a hollow shaft and a clamp. (1)

The disadvantage of the pump is the unsatisfactory service life due to the relatively rapid wear of the contacting surfaces of the worm-wheel pair in continuous operation.

Also known is a surface drive of a borehole screw pump, consisting of an engine, a module, a gearbox, suspension and sealing units of the discharge line and couplings. (2)

The disadvantages of this device include:

- Significant operating costs due to the need for preventive maintenance of the sealing unit located in a difficult to reach area, as well as the difficulty in achieving alignment of the shaft of the module and gearbox;

-high laboriousness of manufacture, due to the presence in the design of a large number of parts, which are subject to stringent requirements.

The closest in technical essence to the proposed one is the drive of a vertical borehole pump, including a drive shaft.

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M1SI 6 F 04 V 47/02

housing, base, coupling, ball-bearing assembly, sealing and sliding bearing assemblies. (3)

Significant disadvantages of the drive are:

-low operational reliability due to the rapid failure of the bearing assembly and the sealing assembly, due to the fact that during installation it is impossible to achieve alignment of the shafts of the electric motor, pump and drive shaft due to their rigid arrangement in the housing;

-high laboriousness of the manufacture of some parts and assemblies, due to increased requirements for their manufacture in order to achieve the desired alignment of the shafts.

The objective of the utility model is to create a drive that possesses; its increased operational reliability and low laboriousness of the manufacture of parts and assemblies, we provide; their alignment of its shafts.

This problem is solved by the proposed device, including a drive shaft, housing, base, coupling, ball bearing assembly, sealing units and sliding bearings.

What is new is that the ball bearing assembly is housed in a cup mounted in a housing whose contact surfaces are made in a sphere; as a coupling connecting the motor shaft to the drive shaft, an elastic finger coupling is used, consisting of half-couplings with longitudinal grooves and elastic fingers installed in them, and the grooves of the half-coupling located on the drive shaft from the side of the latter are provided with a persistent annular collar; the sealing unit is made in the form of a mechanical seal, consisting of a rotating cup mounted on the drive shaft, a movable cup, rotating and non-rotating rigid sealing rings, cuffs, springs, pins and a housing fixed to the drive base with a flange equipped with a one-sided radial groove with width, larger diameter drive shaft.

 FIG. 2 is a section along aa of FIG. 1.

In Fig.Z - section along BB of Fig.1.

Figure 4 is a section along BB of FIG. 1.

In Fig. 3 is a section along G-G of Fig. 1.

The drive consists of (Fig. 1) an electric motor 1, a housing 2 mounted on a base 3 connected to an adapter 4, an elastic coupling 5, a ball-bearing assembly 6, a mechanical seal 7, a sliding bearing 8, a drive shaft 9 and a sleeve coupling 10.

The elastic coupling 5 (Fig. 2) consists of half-couplings 11 and 12c with longitudinal grooves and elastic fingers located between them. The half-coupling 12 is equipped with a persistent annular collar 14 (Fig. 1).

Ball bearing unit 6 consists of two angular contact bearings and radial mounted in a glass 15, which is placed in the housing 16 with the possibility of self-aligning on a spherical surface D.

The mechanical seal 7 consists of rotating and moving cups 17 and 18, rotary; ayup; rotating and neurotic; ayup1; rigid rigid sealing rings 19 and 20, cuffs 21, springs 22 and 23 (figure 4), pins 24 and 25 (Fig. 3 and 4), the housing 26, the flange 27 with a groove 28 (Fig. 5).

The plain bearing 8 is provided with an elastic shell 29.

The device operates as follows.

The torque from the electric motor 1 is transmitted to the coupling half 11 and through the elastic fingers 13 of the coupling half 12, which drives the drive shaft 9. The latter transfers the force to the sleeve coupling 10, and it - to the pump shaft and drives it.

The technical and economic advantages of the proposed drive are that:

- sharply reduced leakage through seals due to the use of mechanical seal, which eliminates the formation of micro-gaps between

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rubbing surfaces, as is the case in packing designs;

- increased operational reliability due to the fact that the alignment of the shafts of the electric motor and the drive is ensured by the ability of the bearing assembly to self-install, and through the use of an elastic flexible coupling.

Information used

1.Analog. RF patent No. 2.136.965, MKI 6 F 04 B 47/02, 1999

2.Analogue. RF patent No. 2.139.448, MKI 6 F 04 B 47/02, 1999

3.Prototype. The instruction manual for the installation of a centrifugal pumping unit UNOTsV-125-1500 manufactured by Izhneftemash, 2001. (LU, pp. 1, 13-16 attached).

Claims (1)

A vertical borehole centrifugal pump drive including a drive shaft, a housing, a base, a coupling, a ball bearing assembly and sealing and sliding bearing assemblies, characterized in that the ball bearing assembly is housed in a cup mounted in the housing, the contact surfaces of which are made in a sphere; as a coupling connecting the motor shaft to the drive shaft, an elastic finger coupling is used, consisting of half-couplings with longitudinal grooves and elastic fingers installed in them, the grooves of the half-coupling located on the drive shaft provided with a persistent annular collar from the side of the latter; the sealing unit is made in the form of a mechanical seal, consisting of a rotating cup mounted on the drive shaft, a movable cup, rotating and non-rotating rigid sealing rings, cuffs, springs and a housing fixed to the base of the drive using a flange equipped with a one-sided radial groove with a width greater than drive shaft diameter.