SU1689657A1 - Piston electrical pump - Google Patents

Abstract

The invention relates to the hydraulic engineering industry and allows to increase the operational reliability of a piston pump by eliminating the seal at the location of the rod in a sealed housing. A reciprocating electric drive, made in the form of a stator 2 with an electromagnetic winding placed in a hermetic case 3 rigidly fixed inside the tubular element 4 through the upper and lower partitions 5 and 6, is connected with the piston pump 1. In the case 3 there is a movable rod 7, one end connected to the piston 8. The piston 8 is made with a suction valve 9 and a hole 10 for the passage of fluid in its lower part and is installed in the housing 3 with the possibility of forming a chamber 11 for volumetric displacement of the fluid bounded by the upper m end of the piston 8, the housing 3 with a partition 6 and the element 4. The rod 7 is made with pressure valve 12. The free end of the rod 7 is made of magnetostrictive material. Partitions 5, 6 are made in the form of a cover 13 and the bottom 14 of the housing 3 and are provided with through axial channels 15, 16. Valves 12 are installed in the channels 16. 1 sludge. C}

Description

The invention relates to hydraulic engineering, in particular to reciprocating electric pumps, and can be used for pumping various fluids with an adjustable flow rate, cryogenic fluids, as well as for lifting formation fluids from oil wells.

The purpose of the invention is to increase operational reliability by eliminating seals at the location of the rod and the sealed housing.

In the drawing, a piston electric pump ;.

The piston electric pump contains a piston pump 1 and an associated electric drive with a variable frequency of translational action (not shown), made in the form of a stator 2 with an electromagnetic winding, placed in a sealed housing 3, rigidly fixed inside the tubular element 4 through the upper 5 and lower 6 partitions, located in a sealed housing 3, a movable rod 7, one end of which is connected with. a piston 8 made with at least one suction valve 9 and a hole 10 for the passage of fluid in its lower part and installed in an airtight housing 3 with the possibility of forming a chamber 11 volumetric fluid displacement, limited by the upper end of the piston 8, a sealed housing 3 with a lower partition 6 and a tubular element 4, as well as at least one discharge valve 12.

The free koi ETs of the movable rod 7 is rigidly connected to the upper partition 5 and is made of magnetostrictive material having the effect of giant magnetostriction, for example, TbFIg, and the upper 5 and lower 6 of the partition are respectively made in the aide of the cover 13 and bottom 14 of the non-magnetic material of the sealed housing 3 and equipped with through axial channels 15 and 16. moreover, the discharge valves 12 are installed in through axial channels 16 of the bottom 14 of the sealed housing 3.

The proposed piston electric pump operates as follows.

When electric current is applied to the electromagnetic winding of the stator 2 of the translational action electric drive, electromagnetic induction is induced in it, the magnetic rod of which is closed through the rod 7. The power source (not shown) of the translational action electric drive generates an alternating current, for example, of a sinusoidal shape, 3 due to this, when the magnitude of the current increases from zero to a maximum value, there is an increase in the magnetic flux penetrating the rod 7, made of magnetostrictive material of a giant magnet tostriktsii. In this case, the rod 7 lengthens, moving the piston 8 of the piston pump 1 down, the suction valves 9 open, the volume of the chamber 11 increases and, for example, reservoir fluid from the borehole (not shown) through the hole 10 in the piston 8 enters the chamber 11 of a variable volume. Pressure valves 12 are closed. Then, the magnitude of the alternating current decreases from maximum to zero, while the magnitude of the magnetic flux passing through the rod 7 made of magnetostrictive material of giant magnetostriction decreases accordingly, the rod 7 is shortened, and ·, the piston 8 of the piston pump 1 returns to its original position, t. e. moves up. In this case, the suction valves 9 are closed, the volume of the chamber 11 is reduced, the pressure valves · 12 are opened and the reservoir fluid is displaced from the chamber 11 of variable volume into the tubular element 4 and then passes through the axial channels 15 in the cover 13 of the sealed housing 3 into pump pipes (not shown) and then to the day surface.

Then the piston pump cycle is repeated.

Claims (1)

Claim A piston electric pump containing a reciprocating piston and a translational electric drive associated with it, made in the form of a stator with an electromagnetic coil placed in a sealed housing, rigidly fixed inside the tubular element through the upper and lower partitions, a movable rod located in the sealed housing, one end of which is connected to a piston made with at least one suction valve and a hole. for the passage of fluid in its lower part and installed in a sealed housing with the possibility of the formation of a chamber for volumetric fluid displacement, limited by the upper end face of the piston, a sealed housing with a lower baffle and a tubular element, as well as at least one discharge valve, which is necessary in order to increase operational reliability by eliminating sealing in place the location of the rod in a sealed housing, the free end of the rod is rigidly connected to the upper partition and is made of magnetostrictive material, and the upper and lower partitions are made respectively of the form of a cover and bottom egg casing and equipped with through axial channels are installed in through axial channels, bottom channels, and pressure valves of the sealed enclosure.