High-pressure fluid mixing pump control system and fluid suction control method

Abstract

A high-pressure fluid mixing pump control system and a fluid suction control method, the system comprises a transmission threaded rod and a resolver sensor, wherein: one end of the transmission threaded rod is connected to an oil cylinder piston of a mixing pump, while the other end of the transmission threaded rod is connected to the resolver sensor either directly or via a rotary element that rotates coaxially with the transmission threaded rod. The high-pressure fluid mixing pump control system implements precision control via a mechanical means, converts a linear motion of the piston into a rotary motion, and utilizes the resolver sensor for precision measurement of a rotation angle, thus acquiring a piston displacement amount, and finally acquiring a suction volume. At the same time, an accelerator and an electric brake are also designed, for controlling starting and stopping of the mixing pump.

Claims

1. A high-pressure fluid mixing pump control system, comprising: a transmission threaded rod, and a resolver sensor, wherein one end of said transmission threaded rod is connected to an oil cylinder piston of a mixing pump, while the other end of said transmission threaded rod is connected to a connecting shaft via a bearing and a rotary nut, the connecting shaft is also connected to said resolver sensor via an accelerator that rotates coaxially with said transmission threaded rod, the accelerator increases the rotary speed to reduce transmission torque.

2. The system according to claim 1, also comprising: an electric brake being connected to said accelerator.

3. A fluid suction control method using the high-pressure fluid mixing pump control system according to claim 1, said method comprising: said resolver sensor metering the number of revolutions of said transmission threaded rod or said accelerator; obtaining a linear displacement amount of said piston on the basis of said number of revolutions; obtaining a suction amount of said mixing pump on the basis of the linear displacement amount of said piston.

4. The method according to claim 3, also comprising: controlling the rotate speed of said transmission threaded rod via said accelerator.

5. The method according to claim 3, also comprising: controlling starting and stopping of said mixing pump via an electric brake of said system.

6. The method according to claim 4, also comprising: controlling starting and stopping of said mixing pump via an electric brake of said system.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) Drawings are used for providing further understanding of the technical schemes of the present invention and constitute a part of the description, used for explaining the technical schemes of the invention in combination with the embodiments of the invention, not for limit the technical schemes of the invention.

(2) FIG. 1 is a diagram of the makeup of the existing high-pressure fluid mixing pump control system;

(3) FIG. 2 is a diagram of the makeup of the high-pressure fluid mixing pump control system of an embodiment of the invention.

PREFERRED EMBODIMENTS OF THE INVENTION

(4) Below the embodiments of the invention will be described in further detail with reference to the drawings. What should be noticed is that the embodiments of the invention and various features of the embodiments can be combined with one another under the premise of no confliction.

(5) As shown in FIG. 2, the high-pressure fluid mixing pump control system of an embodiment of the invention mainly comprises: a transmission threaded rod 1, a bearing 2, a rotary nut 3, a connecting shaft 4, an accelerator 5, an electric brake 6 and a resolver sensor 7, wherein, the transmission threaded rod 1 is connected to a piston of a piston cylinder, and the linear motion of the piston is converted into a rotary motion via the transmission threaded rod 1, the bearing 2 and the rotary nut 3; the accelerator 5 increases the rotary speed to reduce transmission torque. The electric brake 6 is used for braking the piston to reach the purpose of controlling the motion of the piston; the resolver sensor 7 is used for metering the number of revolutions of the accelerator 5 and finally acquiring the suction amount of the mixing pump.

(6) The specific operation of the high-pressure fluid mixing pump control system of an embodiment of the invention is as follows: when sucking formation fluid is needed, the piston performs a linear motion, converting the linear motion of the piston into a rotary motion via the threaded rod 1, the bearing 2 and the rotary nut 3 and controlling starting and stopping of the mixing pump via the accelerator 5 and the electric brake 6, utilizing the resolver sensor 7 to measure precisely the rotation angle, thus acquiring the displacement amount of the piston, and finally acquiring the precise suction amount, thus achieving the purpose of precisely controlling the fluid suction volume.

(7) In summary, the high-pressure fluid mixing pump control system provided in an embodiment of the invention completely adopts the mode of mechanical control and is free of outside influence, thus is of high precision and has the advantages of a simplified structure, compactness, and great stability and reliability.

(8) In addition, an embodiment of the invention also provides a fluid suction control method on the basis of aforesaid high-pressure fluid mixing pump control system. The method comprises mainly:

(9) 1) the resolver sensor metering the number of revolutions of the transmission threaded rod or the rotary element;

(10) 2) obtaining the linear displacement amount of the piston on the basis of the number of revolutions;

(11) 3) obtaining a suction amount of the mixing pump on the basis of the linear displacement amount of the piston.

(12) The method may also comprise: controlling the rotate speed of the transmission threaded rod via the accelerator.

(13) The method may also comprise: controlling starting and stopping of the mixing pump via the electric brake.

(14) While the embodiments disclosed in the invention are as above, the foregoing contents merely are embodiments employed for easy to understanding the present invention, and are not intended to limit the present invention. Any person skilled in the art belongs to the invention can make any modification and change to the forms and details of the embodiments without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall subject to the scope defined by the appended claims.

INDUSTRIAL APPLICABILITY

(15) The high-pressure fluid mixing pump control system provided in an embodiment of the invention completely adopts the mechanical control to convert the linear motion of the piston into a rotary motion, and utilizes the resolver sensor to measure precisely a rotation angle, thus acquiring a piston displacement amount, and finally acquiring a suction volume, with very high precision and the advantages of a simplified structure, compactness, and great stability and reliability.