CN214425042U

CN214425042U - Device for realizing reciprocating motion of fracturing pump by reversing of screw rod

Info

Publication number: CN214425042U
Application number: CN202022643711.4U
Authority: CN
Inventors: 张弭; 王江阳; 马双富; 谭浩天; 陈宗强; 王信军
Original assignee: Sichuan Honghua Electric Co ltd
Current assignee: Sichuan Honghua Electric Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-10-19
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a realize fracturing pump reciprocating motion's device through lead screw switching-over, including gear A, gear B, gear C, gear D, gear E, gear F, gear G, the lead screw, axle A, axle B, screw-nut, clutch A and clutch B, gear A meshes with gear B and gear C respectively, gear B is coaxial with axle B, clutch B is half to be connected with gear B, its second half is connected with axle B, gear E and axle B coaxial coupling, gear E and gear F meshing, gear F is connected with screw-nut, screw-nut and the supporting connection of lead screw, gear C and gear D meshing, gear D is coaxial with axle A, clutch A is half to be connected with gear D, its second half is connected with axle A, gear G and axle A coaxial coupling. The utility model has the advantages that: the ball screw drive meeting the high thrust is realized, and by reducing the rotational inertia in the reversing process, the reversing impact is small under the condition of driving the constant rotating speed.

Description

Device for realizing reciprocating motion of fracturing pump by reversing of screw rod

Technical Field

The utility model relates to a mechanical equipment field, especially a device through lead screw switching-over realization fracturing pump reciprocating motion.

Background

The fracturing pump is a machine for conveying fluid or pressurizing fluid, which transfers the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, in the petroleum drilling equipment, the fracturing pump belongs to a more important class of equipment, most of the fracturing pumps used in current oil fields are single-acting reciprocating piston pumps, the power transmission mode of the fracturing pump in this form is as follows: the motor is driven by a chain or a belt to transmit power to the transmission shaft, then a gear of the transmission shaft is meshed with a large gear ring on the crankshaft to drive the crankshaft to rotate, the power loss is large, the structure is slightly complex, and equal phase angle difference exists among cranks, so that large vibration exists in the running process of the fracturing pump.

The following two common ways of reciprocating a common ball screw are used:

1. do positive and negative raceway on the lead screw, and then control lead screw or lead screw nut's positive and negative rotation to reach ball reciprocating motion's purpose, the shortcoming of this kind of mode lies in: due to the existence of the positive and negative roller paths, the thrust is reduced, and meanwhile, if the lead screw or the nut always keeps constant-speed rotation, the two ends of the roller paths can bear very large impact, so that the service life of the ball screw is greatly reduced.

2. The positive and negative rotation of the driving motor is directly controlled, the motor drives the lead screw (or the lead screw nut) directly through a rotation transmission device, and therefore the purpose of reciprocating motion of the ball screw is achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a realize fracturing pump reciprocating motion's device through the lead screw switching-over.

The purpose of the utility model is realized through the following technical scheme: a device for realizing reciprocating motion of a fracturing pump by reversing a screw rod comprises a gear A, a gear B, a gear C, a gear D, a gear E, a gear F, a gear G, a screw rod 8, a shaft A, a shaft B, at least one screw nut 9, a clutch A and a clutch B, wherein the gear A is respectively meshed with the gear B and the gear C, the gear B is coaxial with the shaft B, one half of the clutch B is connected with the gear B, the other half of the clutch B is connected with the shaft B, when the clutch B is disengaged, the shaft B does not rotate, the gear E is coaxially connected with the shaft B, the gear E is meshed with the gear F, the gear F is sleeved on the screw nut 9, the screw nut 9 is sleeved on the screw rod 8, the gear C is meshed with the gear D, the gear D is coaxial with the shaft A, one half of the clutch A is connected with the gear D, the other half of the clutch A is connected with the shaft A, when the clutch A is disengaged, the shaft a10 does not rotate and the gear G7 is coaxially connected with the shaft a 10.

Preferably, during the disengagement and closing process, the clutch A12 and the clutch B13 must be disengaged before one clutch is closed.

The method for using the device comprises the following steps:

s1: the clutch B13 is closed, the shaft B11 rotates along with the gear B2, meanwhile, the gear E5 is driven to rotate, the gear E5 drives the gear F6 to rotate, and the lead screw nut 9 rotates along with the gear, so that the lead screw 8 is driven to move linearly in the forward direction;

s2: when the clutch A12 is closed, the gear D4 drives the shaft A10 to rotate through the clutch A12, then the gear G7 is driven to rotate, the gear G7 drives the gear F6 to rotate reversely, then the lead screw nut 9 is driven to rotate reversely, finally the lead screw 8 is driven to move linearly in a reverse direction, and the linear motion of the lead screw 8 drives the piston of the fracturing pump to move linearly in a reciprocating manner.

Preferably, the reciprocating component is a piston or plunger.

The utility model has the advantages of it is following: the ball screw drive meeting the high thrust is realized, and by reducing the rotational inertia in the reversing process, the reversing impact is small under the condition of driving the constant rotating speed.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

in the figure, 1-gear a, 2-gear B, 3-gear C, 4-gear D, 5-gear E, 6-gear F, 7-gear G, 8-lead screw, 9-lead screw nut, 10-shaft a, 11-shaft B, 12-clutch a, 13-clutch B.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended advantageous objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, and furthermore, particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments:

as shown in fig. 1, an apparatus for realizing reciprocating motion of a fracturing pump by screw rod reversing comprises a gear a1, a gear B1, a gear C1, a gear D1, a gear E1, a gear F1, a gear G1, a screw rod 8, a shaft a1, a shaft B1, at least one screw nut 9, a clutch a1 and a clutch B1, wherein the gear a1 is respectively meshed with the gear B1 and the gear C1, the gear B1 is coaxial with the shaft B1, one half of the clutch B1 is connected with the gear B1, the other half of the clutch B1 is connected with the shaft B1, when the clutch B1 is disengaged, the gear E1 is coaxially connected with the shaft B1, the gear E1 is meshed with the gear F1, the gear F1 is sleeved on the screw nut 9, the screw nut 9 is sleeved on the gear C368, the gear C1 is meshed with the gear D1, the gear D1 is coaxially connected with the shaft a1, the shaft a1 is connected with the other half of the clutch a1, and the shaft a1 is connected with the shaft a1, when clutch A12 is disengaged, shaft A10 does not rotate and gear G7 is coaxially connected with shaft A10.

In an alternative embodiment, both clutch A12 and clutch B13 are disengaged before one clutch is engaged during disengagement and engagement.

A method for realizing reciprocating motion of a fracturing pump by reversing a screw rod comprises the following steps:

In an alternative embodiment, the reciprocating element is a piston or plunger.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, as long as they are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a realize fracturing pump reciprocating motion's device through lead screw switching-over which characterized in that: comprises a gear A (1), a gear B (2), a gear C (3), a gear D (4), a gear E (5), a gear F (6), a gear G (7), a screw rod (8), a shaft A (10), a shaft B (11), at least one screw rod nut (9), a clutch A (12) and a clutch B (13), wherein the gear A (1) is respectively meshed with the gear B (2) and the gear C (3), the gear B (2) is coaxial with the shaft B (11), one half of the clutch B (13) is connected with the gear B (2), the other half of the clutch B is connected with the shaft B (11), the gear E (5) is coaxially connected with the shaft B (11), the gear E (5) is meshed with the gear F (6), the gear F (6) is sleeved on the screw rod nut (9), the screw rod nut (9) is sleeved on the screw rod (8), the gear C (3) is meshed with the gear D (4), gear D (4) are coaxial with axle A (10), clutch A (12) half is connected with gear D (4), and its the other half is connected with axle A (10), gear G (7) and axle A (10) coaxial coupling.

2. The device for realizing the reciprocating motion of the fracturing pump through the reversing of the screw rod as claimed in claim 1 is characterized in that: during the process of disengaging and closing the clutch A (12) and the clutch B (13), before one clutch is closed, the other clutch must be disengaged.