RU36461U1 - Section of the borehole centrifugal multistage pump - Google Patents

Description

Section of a borehole centrifugal multi-stage pump.

The utility model relates to petroleum engineering, namely, to the designs of sections of multi-stage centrifugal borehole pumps operating in wells with a high content of abrasive particles. Such pumps are designed for pumping reservoir fluid and are used in many fields.

A known pump (RU 2163693, publication date 2001.02.27) containing a section in which a shaft with a fifth is mounted, resting on a bearing axial bearing and radial bearings. This design does not have a sufficiently high wear resistance in the area of contact of the heel with the axial bearing support.

The closest analogue of the claimed utility model is a borehole centrifugal multistage pump section containing a shaft with a fifth, and the shaft and heels have keyway grooves, an axial bearing support (fixed in the section housing), a radial bearing sleeve with a longitudinal keyway, and the working surface of the axial bearing support made of solid alloy, the heel and axial support are fixed with a straight key, (p. 92 in the book. Well pumping units for oil production. V.N. Ivanovsky, V.I. Darishchev, .A.Sabirov, V.S.Kashtanov, S.S.Pekin. M. PMU. Izdvo Oil and Gas Russian State University of Oil and Gas. Gubkin, 2002, 824). The wear resistance of the tribological conjugates of the axial support of the indicated section can be increased through the use of carbide radial bearing bushings. The disadvantage of this design is that the execution in such a sleeve longitudinal keyway groove requires expensive technological operations (for example, erosion treatment). In addition, the presence of a keyway groove along almost the entire length of the shaft and along the entire length of the radial bearing sleeve reduces their mechanical strength.

This utility model aims to address the above disadvantages of known technical solutions. Achievable technical result consists in increasing the wear resistance of the tribological conjugation of the axial support while reducing the complexity of creating a keyed connection of the carbide sleeve, increasing the mechanical strength of the radial bearing sleeve and shaft.

g l 5% J

MPK-7 F04D 1/06, F16C 17/00, FOIC 21/02

The specified technical result is achieved due to the fact that in the section of a borehole centrifugal multistage pump containing a shaft with a keyway, a heel with a keyway, a radial bearing sleeve with a keyway, an axial bearing, keys for fixing on the shaft of the heel and the specified radial bearing sleeve, at least two keys are made Shaped, the radial bearing sleeve is made of carbide material and is fixed by the ends of the L-shaped keys perpendicular to the corresponding the keys located in the keyways of the shaft, and the above ends of the L-shaped keys for fixing the sleeve are located in the keyways of the sleeve that are made on its end surface, in addition, the axial bearing can be double-sided and located in the upper part of the pump section, moreover, the section may contain at least two radial bearing bushings and two heels, and each of the pairs formed by the radial bearing sleeve and fifth can be respectively fixed on the shaft with th two L-shaped tongues, the working surface of the heel can be executed carbide material, the end face of the sleeve can serve as a thrust bearing, bushing keyways may be formed through-radial.

To understand the essence of the utility model, drawings are provided. Figure 1. shows a view of the pump section containing the axial support of the pump section with a l-shaped key. FIG. 2. contains two types of radial bearing bush with a groove for the shaped end of the key.

The pump section contains a shaft (6) with a fifth (1) transmitting axial force to the axial bearing support (5), a radial bearing sleeve (4) of carbide material. A part of the L-shaped key (2) is placed in the keyways of the shaft (3) and the heel, and the other part (perpendicular to the above) is installed in the keyway of the radial bearing sleeve made radially through on its end surface.

The above device operates as follows. When the pump is turned on in the operating mode, the axial force acts on the pump shaft due to the difference in fluid pressure at the inlet and outlet of the pump section, while the shaft heel (1) transfers axial forces to the working surface of the bearing support. The L-shaped key (2) fixes the heel and the radial bearing sleeve from turning, transmitting torque to them from the shaft.

Claims (5)

1. Section of a borehole centrifugal multistage pump, comprising a shaft with a keyway, a heel with a keyway, a radial bearing sleeve with a keyway, an axial bearing support, dowels for fixing on the shaft of the heel and the specified radial bearing sleeve, characterized in that at least , two dowels are made L-shaped, the radial bearing sleeve is made of carbide material and is fixed by the ends of the L-shaped dowels perpendicular to the corresponding parts of the dowels placed in the keys grooves of the shaft, and the above ends of the L-shaped keys for fixing the sleeve are located in the keyways of the sleeve, which are made on its end surface. 2. The section according to claim 1, characterized in that the axial bearing is double-sided and is located in the upper part of the pump section, and the section contains at least two radial bearing bushings and two heels, each of which is a pair formed by a radial bearing sleeve and fifth, respectively, is fixed on the shaft using two L-shaped keys. 3. Section according to claims 1 and 2, characterized in that the working surface of the heel is made of carbide material. 4. Section according to claims 1 to 3, characterized in that the end surface of the sleeve acts as a thrust bearing. 5. Section according to claims 1 to 4, characterized in that the keyways of the sleeve are made radial through.