RU6093U1 - SUBMERSIBLE MOTOR - Google Patents

Abstract

A submersible motor containing a stator, an outer, inner cylinder and end caps forming a waterproof container for the stator, as well as container sealing elements, characterized in that the end caps are made in the form of stepped bushings, the large lateral surface of which is associated with the inner surface of the outer cylinder, and smaller - with the inner surface of the inner cylinder, and on the surfaces of the bushings are made annular grooves in which the sealing elements of the stator container are installed, shaft sliding bearings are installed in the central openings of the end caps, the bearing in the upper cover is protected on the side of the upper shaft end by seals located on the latter, and in the lower cover the bearing is protected by a diaphragm type compensator, including a housing, a base and a diaphragm, between the outer end of the diaphragm and the housing with the central hole of the compensator is freely mounted disk with the possibility of mechanical movement of the diaphragm, and in the bottom cover of the Central hole is made step m, its large stage is coupled to the base of the compensator and sealing means are installed on it, and at the lower stage there is a sliding bearing, a thrust rotor bearing is installed on the upper end of the lower cover, while there are channels in the body of the lower cover for connecting the central hole of the shaft with the cavity of the compensator .

Description

Submersible Electrode

The utility model relates to electrical engineering and can be used to drive centrifugal, screw and other pumps in the production of fluids from wells, tanks, etc.

It is known to construct a shielded electric motor for a reaction apparatus, comprising a rotor with bearings mounted on the waggon, a stator, outer and inner cylinders, which together with the upper and lower covers form a container of stator length. (CM.a.c.N 1566443, M.КЛ.5 Н02 К 9/19, 1990).

The disadvantage of the known design of the electric motor can be considered the impossibility of spreading the field of its application for driving submersible liquid pumps, because it contains OTCvTCTBvTiT specific elements, which, moreover, are designed to prevent the liquid from getting inside in places that cannot be reached. Meteorically, from the point of view of a new functional purpose: the connection point of the electric motor with the pump, the cable entry point into the electric motor, and there is no media separation in the electric motor itself .

The design of a submersible electric motor containing a stator, outer and inner cylinders and end caps is known, forming a waterproof container for the stator as well as container sealing elements (see US patent N 4492889, NKI o10 -8, M.cl. H02 K 5/10, Applicant Hitachi Ltd (Japan), con. application dated 11.17.83, N 57 -20с114 FROM 19.11.82 publ. 08.01.85.-.

The indicated features are common with the claimed invention. The free passage of the container in the known construction, where the core with the winding is located, is filled with a curing resin, the wall thickness of the inner cylinder is increased at some points

M.KL.5 H02 K 5/12

its opposite end parts near the junction of this cylinder with covers. One of these points is located on the outer side surface of one of the end parts, the other on the inner side surface of the second end part of the cylinder.

A disadvantage of the known design can be considered its nnremontability after pouring the free space of the container between the cylinders and the lids with a cured resin. In addition, from a reliability point of view, 4 are: the joints of the cylinders and caps sealed with a curing resin, the joints of the insulation of conductive conductors with cured resin along the entire length of the electric motor. When working under the influence of heat rising from the winding, all of these elements are heated: they are heated with different expansion coefficients and thermal conductivity, which leads to the appearance of cracks that no longer disappear in the presence of water; therefore, the fracture process starts from the beginning of immersion in water and until its final penetration water to heat-conducting conductors. This process is faster, the greater the difference in the coefficient: 1 of the thermal conductivity and expansion of the used materials.

The task that the ball set in the process of creating a utility model is to improve the submersible electric motor, - which ensures the independence of the stator windings being healed from water penetration, as well as the independence of the protection from the thermal effects of the stator winding, through the use of elastic elements installed between the cylinders and the covers as well as between the cover and the lead-in cable, which eliminated the penetration of water between the cylinders and the covers, as well as between the cover and the lead-in am cable, and makes completely redundant for (.

casting the container with a cured resin, which, in turn, allows the structure to become maintainable, less demanding on the materials used and the manufacturing technology, and more reliable.

The problem is solved in that in the submersible motor containing the stator, the outer, inner cylinders and end caps forming a waterproof container for the stator, as well as container sealing elements, in contrast to the known one, the end caps are made in the form of stepped bushings, the large side surface of which is associated with the inner surface of the outer cylinder, and the smaller one with the inner surface of the inner diameter, moreover, annular grooves are made on the indicated surfaces of the bushings, in which The sealing elements of the stator container have been renewed, and sliding bearings of the van are installed in the central holes of the end caps, in the upper cover the bearing is protected on the side of the upper end of the shaft by lip seals located on the last end, and in the lower cover the bearing is spherical with a diaphragm type compensator, including the housing, base and diaphragm , between the outer end of the diaphragm and the housing with the Central hole of the compensator is freely installed disk with the possibility of mechanical movement of the diaphragm, and in the lower the central hole is stepped to the lid, its large step is paired with the base of the compensator and sealing means are installed on it, and the smaller step is paired with a sliding bearing, the rotor thrust bearing is installed on the upper end of the lower bracket, while there are channels in the body of the lower bracket for connecting the central shaft holes with compensator cavity.

Making end caps in the form of stepped bushings with grooves

To accommodate the sealing elements with central holes, it provides reliable tight connection with the cylinders while centering the rotor axis, relatively higher than the indicated cylinders. The protection of the upper sliding bearing with a lip seal, and the lower one with a diaphragm-type compensator, protects the bearings of the electric motor from getting into contact with each other. ; parts that are always part of the pumped water, especially from wells.

The implementation of the compensator with the possibility of mechanical movement of the diaphragm and the presence of clones in the body of the cover for connecting the center hole of the shaft with the cavity of the compensator ensure the creation of a closed volume inside the electric motor, which is filled with clean liquid, favorable for the sliding bearings of the electric motor and, at the same time, performing conservation functions until the electric motor immerses in water

The inventive design is illustrated by the drawing, which shows a General view of the submersible electric motor in section.

The submersible motor includes a stator 1, an outer cylinder 2, as well as a rotor 3 mounted on the shaft 4. The stator 1 is protected from the inside by an inner cylinder 5, and the ends are protected by the upper wing and lower cover 7, cylinders 2.5 and 6.7 form a waterproof container for the stator. The end caps 6 and 7 are made in the form of bushings, the larger surface of which is interfaced with the inner surface of the outer cylinder 7. seals 8. At smaller stages, grooves are made in which O-rings 9 are installed. O-rings & and 9 are sealing elements of the stator container. In the center holes of the end caps b and 7, sliding bearings 10 and 11 are installed to hold and center the shaft 4. In the upper case b, the bearing 10 is sealed with IZ lip seals located on the valve head 4. The plain bearing 11 in the bottom cover 7 is protected by a diaphragm compensator type. The compensator includes a housing 13 with a central hole 1.4, a base 1 ° and flnaitiparMv 16. A disk 17 is freely installed between the outer end of the diaphragm 16 and the housing 1 °. The disk 17 is able to mechanically move the beam 16 if necessary during the movement of the disk 17 in the axial direction. In the lower hanger 7, the central hole is made stepwise. Its large stage 18 is associated with the side surface of the base 15, on which annular grooves are made for sealing 19. The sliding bearing 11 is placed on the lower stage 20 of the central hole of the cover 7. The upper end of the lower cover 7 is used to form a bearing surface for the thrust bearing 21 of the rotor 3. In the body of the cover 7, channels 2 are made, which through the radial channels 3 of the shaft 4 connect the center hole 24 of the shaft 4 with the cavity 5 of the diaphragm 16. The central hole 4 of the shaft 4 is blind and ends above the radio channel fishing 28. Through hole in the upper cover 26 b passes current lead, which is sealed therein by seals 27, preload nut 2S. The upper cover b and the lower cover 7 are connected to the outer cylinder 2 by means of a threaded connection. In the upper G there is a channel 29, which is connected with the cavity 30, where the rotor 3 is installed

- 6 of the motor, and is closed by a plug 31. The base 15 is connected to the lower crib 7 by means of a threaded connection made at the large step 18 of the central hole of the cover 7. The motor shaft 4 is connected to the pump by means of a coupling (not shown) The electric motor is assembled as follows Thus, the motor stator 1, pressed into the outer cylinder: and protected by the inner cylinder 5, is connected with the help of the thread to the lower cover 7, on which a part of the thrust bearing 1 of the outer sleeve is already mounted a sliding bearing 11 and sealing elements 8 and 9. Then, a rotor 3 mounted on a shaft 4 is installed, with a part of a thrust bearing 1 and internal sleeves of the bearings 10 and so on mounted on it. Further, a top cover b is installed, connected to the cylinder by a thread, with the outer sleeve of the sliding bearing 10 mounted on it and sealing elements 8 and 9. Then, a conductive cable 6 is inserted into the hole provided in the earpiece, which is sealed with a seal 27 and held by the nut S. After that, a lip seal 1 is installed, a compensator filled with liquid is connected, and a disk 17 is pressed through the hole 14, which squeezes the liquid from the cavity of the compensator into the cavity of the motor; C) until it appears on the upper edge of the channel 9, which is then closed by the sealing element 31. B In this condition, the submersible motor is ready to be connected to the pump.

Submersible motor operates as follows. By cable 6, an electric current is supplied to the stator winding 1,

- 6 which, by creating a rotating electromagnetic field, leads to the rotor. Rotor 3 connected to the shaft 4, centering sliding bearings 10 and 11 and mounted on the thrust bearing 21. The fluid inside the inner cylinder 5 lubricates the radial bearings 10, 11 and the thrust. one. B npoueo.ce of the operation of the electric motor, an increase in the volume of liquid due to heating is compensated by the diaphragm 16 of the compensator. Inside a sealed container, when heated, air pressure rises, which does not have a harmful effect on the structure, because if not significant. 11th immersion, the change in air pressure inside the container does not exceed the values that cause irreversible changes in the material of the elastic seals 8,9,27. With deep immersion, a change in air pressure has a beneficial effect on seals 8,9,27, because compresses them in the opposite direction to the force of water pressure.

Authors - Patent Owners / O / Omelchenko O.F., Oaenko N.G.,

Claims (1)

A submersible motor containing a stator, an outer, inner cylinder and end caps forming a waterproof container for the stator, as well as container sealing elements, characterized in that the end caps are made in the form of stepped bushings, the large side surface of which is conjugated with the inner surface of the outer cylinder, and smaller - with the inner surface of the inner cylinder, and on the surfaces of the bushings are made annular grooves in which the sealing elements of the stator container are installed, shaft sliding bearings are installed in the central openings of the end caps, the bearing in the upper cover is protected on the side of the upper shaft end by seals located on the latter, and in the lower cover the bearing is protected by a diaphragm type compensator, including a housing, a base and a diaphragm, between the outer end of the diaphragm and the housing with the central hole of the compensator is freely mounted disk with the possibility of mechanical movement of the diaphragm, and in the bottom cover of the Central hole is made step m, its large stage is coupled to the base of the compensator and sealing means are installed on it, and at the lower stage there is a sliding bearing, a thrust rotor bearing is installed on the upper end of the lower cover, while in the body of the lower cover there are channels for connecting the central hole of the shaft with the cavity of the compensator .