Device and method for achieving reciprocating motion of fracturing pump through rotation of lead screw nut

A reciprocating motion, fracturing pump technology, applied in the direction of transmission, pumping device components for elastic fluid, pump components, etc., can solve the problems of impact at both ends of the raceway, thrust reduction, and ball screw life reduction , to achieve the effect of reducing the moment of inertia and reducing the impact of commutation

Pending Publication Date: 2021-03-16
SICHUAN HONGHUA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Make positive and negative raceways on the screw, and then control the positive and negative rotation of the screw or screw nut, so as to achieve the purpose of reciprocating motion of the ball screw. The disadvantage of this method is: due to the existence of positive and negative raceways, To reduce the thrust, at the same time, if the screw or nut is required to keep rotating at a constant speed, the two ends of the raceway will bear a very large impact, which will greatly reduce the life of the ball screw

Method used

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  • Device and method for achieving reciprocating motion of fracturing pump through rotation of lead screw nut
  • Device and method for achieving reciprocating motion of fracturing pump through rotation of lead screw nut

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0027] Such as figure 1 Shown:

[0028] S1, the brake B8 is closed, the screw nut B7 does not rotate, and the rotation of the screw B10 pushes the screw B10 forward;

[0029] S2. The brake B8 is released, the motor 6 does not run and can be reversely driven by the gear C5, the screw nut B7 will follow the rotation of the screw B10, and the screw nut B7 will decelerate in a straight line. When the rotation speed of the screw nut B7 and the screw When B10 is the same, the screw nut B7 does not move in the linear direction;

[0030] S3, the brake B8 is released, the motor 6 drives the gear C5 to rotate, the gear C drives the gear B to rotate, and the screw nut B7 turns in the same direction as the coaxial screw B10. When the screw nut B7 rotates faster than the screw B10, The screw nut B7 moves linearly in reverse, and the linear motion of the screw nut B7 drives the piston of the fracturing pump to move linearly and reciprocatingly.

[0031] As an optional implementation, dur...

specific Embodiment 2

[0033] Such as figure 2 Shown:

[0034] S1, the brake A1 and the brake B8 are closed, the screw nut A3 and the screw nut B7 do not rotate, and the rotation of the screw A 9 and the screw B7 pushes the screw forward;

[0035] S2, brake A 1 and brake B8 are released, if the motor 6 is not running and can be reversely driven by the gear C5, then under ideal conditions, the screw nut will follow the screw to rotate until the rotation speed is the same as the screw, so that The screw nut decelerates in the linear direction. When the rotation speed of the screw nut is the same as that of the screw, the screw nut does not move in the linear direction;

[0036] S3. Brake A1 and brake B8 are released, motor 6 drives gear C5 to rotate, and then drives gear A2 and gear B4 to rotate, and at the same time, ensure that the rotation direction of the screw nut is consistent with the rotation direction of the coaxial screw, and when the rotation speed of the screw nut is higher than When th...

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PUM

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Abstract

The invention discloses a device and method for achieving reciprocating motion of a fracturing pump through rotation of a lead screw nut. The device for achieving reciprocating motion of the fracturing pump through rotation of the lead screw nut comprises a brake B, a gear B, a gear C, the lead screw nut B, a motor and a lead screw B, wherein the gear C is connected with the power output end of the motor, the gear C meshes with the gear B, the lead screw nut B sleeves the lead screw B, the gear B sleeves the lead screw nut B, and the brake B is matched with the lead screw nut B. The device achieves reciprocating motion of the fracturing pump through the method for achieving reciprocating motion of the fracturing pump through rotation of the lead screw nut, and the device has the beneficialeffect that the reversing impact is small under the condition of driving constant rotating speed by reducing the rotational inertia in reversing.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a device and method for realizing the reciprocating motion of a fracturing pump through the rotation of a screw nut. Background technique [0002] A fracturing pump is a machine that transports fluid or pressurizes the fluid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. In oil drilling equipment, the fracturing pump is a relatively important type of equipment At present, most of the fracturing pumps used in oil fields are single-acting reciprocating fracturing pumps. The power transmission mode of this type of fracturing pump is: the motor transmits power to the drive shaft through chain drive or belt drive, Then the gear of the transmission shaft meshes with the large ring gear on the crankshaft to drive the crankshaft to rotate, the power loss is relatively large, and the structure is sligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/12E21B43/26F04B53/00
CPCE21B43/26F04B53/00F16H37/124
Inventor 张弭王江阳马双富谭浩天陈宗强王信军
Owner SICHUAN HONGHUA ELECTRIC
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