RU213430U1 - ELECTRIC SUBMERSIBLE PUMP UNIT - Google Patents

Abstract

The utility model relates to the field of hydraulic engineering, namely to positive displacement axial piston pumps, and can be used in underwater vehicles. The technical result provided by the above design is the operability of the unit when immersed in a corrosive environment under the influence of high external static pressure with a significant reduction in weight and size characteristics and the ability to control pressure and speed. To achieve this result, an electric submersible pumping unit is proposed, containing an axial-piston pump with a pressure regulator, a frequency-controlled valve motor with a cast rotor and a coupling, while the pump with the electric motor has titanium casings, united by a common cavity, and is made in a monoblock design , the connection of the axial piston pump and the electric motor is made using a splined coupling, the connection of the axial piston pump and the electric motor is made according to the shaft-to-shaft type, the spline connection is made with centering on the side surfaces of the teeth. 1 ill.

Description

The utility model relates to the field of hydraulic engineering, namely, positive displacement axial piston pumps, and can be used in underwater vehicles.

State of the art

Examples of submersible axial piston pumps operating in hydraulic drives of downhole pumping units for oil production (RU 66435 U1), as well as valve oil-filled electric motors that drive them (RU 2733806 C1, RU 2246164 C1, RU 2150780 C1) are known from the prior art. . In the aviation industry, electric drive units are widely used, combining a positive displacement pump and a drive motor in one product, in underwater vehicles, titanium casings are used to protect against corrosive sea water and high external pressure, mounted on top of the pump unit housing.

Disclosure of the essence of the utility model

The technical problem to be solved by this technical solution is the possibility of using an electric pump unit in a corrosive environment at great depths under the influence of high external static pressure as part of the hydraulic systems of underwater vehicles.

The technical result of the proposed utility model is to create a speed and pressure controlled monoblock submersible electric pump unit of small dimensions with a built-in pressure regulator for hydraulic systems of underwater vehicles operating in sea water under the action of external hydrostatic pressure.

To achieve the technical result, an electrically driven submersible pumping unit is proposed, containing an axial piston pump with a pressure regulator, a frequency-controlled valve electric motor with a cast rotor and a coupling, while the pump with the electric motor has titanium casings, united by a common cavity, and is made in a monoblock design , the connection of the axial piston pump and the electric motor is made using a splined coupling, the connection of the axial piston pump and the electric motor is made according to the shaft-to-shaft type, the spline connection is made with centering on the side surfaces of the teeth.

The combination of the above essential features leads to the fact that:

the performance of the unit is carried out when immersed in a corrosive environment under the influence of high external static pressure with a significant reduction in weight and size characteristics and the ability to control pressure and speed.

Drawing Description

In the drawing of FIG. 1 shows the view of the claimed unit, where the positions indicate:

1 - axial piston pump;

2 - inclined disk 2;

3 - spool valve of the pressure regulator;

4 - pressure regulator piston;

5 - pressure regulator spring;

6 - valve motor;

7 - hole in the flanges;

8 - splined coupling;

9 - pump housing;

10 - motor housing.

Implementation and implementation examples

Below is an example of a specific implementation of the device, which does not limit the options for its implementation.

The technical problem is solved due to the monoblock execution of the axial piston pump 1 and the motor 6 in titanium cases 9 and 10 with a common internal cavity. This cavity communicates with the external pressure compensator of the hydraulic system, in which the pump is built in, which makes it possible to unload the walls of the housings from pressure and significantly reduce their thickness. The pump 1 is driven through a splined coupling 8 by a valve electric motor 6 with a cast rotor and a variable shaft speed. The splined coupling 8 is centered in the motor and pump shafts along the side surfaces of the splined teeth (internal shaft teeth with external coupling teeth) to compensate for shaft misalignment. The pressure regulator is built into the pump housing 1 and changes the position of its inclined disk 2 using a spool valve 3, a piston 4 and a spring 5.

The utility model according to the drawing of FIG. 1 includes: an axial piston pump 1 with an inclined disk 2 and a pressure regulator consisting of a spool valve 3, a piston 4 and a spring 5. The pump 1 is internally connected to an adjustable valve motor 6 through a hole in the flanges 7 and is driven by a connecting splined coupling 8 with centering on the side surfaces of the teeth. The pump housing 9 and the motor housing 10 are made of titanium.

In the process of operation in the immersed position, the housings 9 and 10 are subjected to a large overpressure. To compensate for it, the cavity of the pump 1 and the cavity of the electric motor 6, interconnected by a hole 7, are connected to an external pressure compensator (not shown in the drawing), which equalizes the pressure outside and inside the unit. The pressure regulator maintains a constant pressure by changing the position of the spool valve 3, which controls the piston 4. The piston 4 rotates the inclined disk 2 in proportion to the compression of the spring 5, thereby changing the working volume of the axial piston pump 1. The valve motor 6, controlled by an external control unit, changes the frequency rotation of the shaft of the unit, thereby regulating the flow of the pump.

Claims (1)

Electric submersible pumping unit, characterized in that it contains an axial-piston pump with a pressure regulator, a frequency-controlled valve motor with a cast rotor and a coupling, while the pump with the electric motor has titanium casings, united by a common cavity, and is made in a monoblock design, the connection of the axial piston pump and the electric motor is made using a splined coupling, the connection of the axial piston pump and the electric motor is made according to the shaft-to-shaft type, the spline connection is made with centering on the side surfaces of the teeth.

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