CN111648933B - Fracturing pump driven by linear motor - Google Patents
Fracturing pump driven by linear motor Download PDFInfo
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- CN111648933B CN111648933B CN202010338835.3A CN202010338835A CN111648933B CN 111648933 B CN111648933 B CN 111648933B CN 202010338835 A CN202010338835 A CN 202010338835A CN 111648933 B CN111648933 B CN 111648933B
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- Prior art keywords
- linear motor
- plungers
- linear
- fracturing pump
- hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
Abstract
The invention discloses a fracturing pump driven by a linear motor, which comprises at least one hydraulic end, wherein a plurality of plungers are arranged on each hydraulic end side by side, each plunger is correspondingly connected with one linear motor, the linear motors drive the plungers to do reciprocating linear motion, and the hydraulic end is also provided with a plurality of control valves for controlling the suction or discharge of liquid when the plungers move. Through directly linking to each other linear electric motor and plunger, drive the plunger through linear electric motor and be reciprocating linear motion, parts such as bent axle link mechanism in having saved conventional fracturing pump, the structure of fracturing pump has been simplified, the reliability and the transmission efficiency of fracturing pump have effectively been improved, and linear electric motor operates steadily, the speed is invariable, output flow and the pulsatility of pressure have basically been eliminated from theory, simultaneously because linear electric motor's stroke can be done long, thereby when satisfying low stroke number, the big displacement demand, the vibration of whole pump and the consumption of fluid end wearing parts have been reduced.
Description
Technical Field
The invention relates to the technical field of fracturing pumps, in particular to a fracturing pump driven by a linear motor.
Background
The function of the frac pump is to convert low pressure liquid to high pressure liquid. The conventional fracturing pump mainly comprises a power end and a hydraulic end, wherein a prime motor drives a crankshaft to rotate through a reduction gear, and then drives a plunger to do reciprocating linear motion through the conduction of a crank connecting rod mechanism, so that the suction and the discharge of liquid are realized. The conventional fracturing pump has the defects of high noise and low reliability in operation due to the existence of mechanical structures such as a reduction gear box, a crankshaft connecting rod mechanism and the like, and the crankshaft connecting rod mechanism has the inherent defects of uneven output flow and large pressure fluctuation. In addition, the crank-link mechanism of the conventional fracturing pump limits the stroke, and the stroke number needs to be increased to achieve large displacement, so that the vibration of the whole pump and the consumption of wearing parts are aggravated due to the excessively large stroke number.
Disclosure of Invention
The invention aims to: aiming at the problems that the conventional fracturing pump has a complicated structure, low reliability, uneven output flow and large pressure fluctuation due to the existence of a crankshaft connecting rod mechanism, and the stroke is limited and is difficult to meet the requirements of low stroke number and large displacement, the fracturing pump driven by the linear motor is provided, the linear motor is directly connected with the plunger, the plunger is driven by the linear motor to do reciprocating linear motion, the stroke of the linear motor can be lengthened so as to meet the requirements of low stroke number and large displacement, and a series of problems of the conventional fracturing pump are solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a linear electric motor driven fracturing pump, includes at least one fluid end, every the one end of fluid end is equipped with a plurality of plunger side by side, every the plunger corresponds and links to each other with a linear electric motor, linear electric motor drives the plunger and is reciprocal linear motion, the other end of fluid end still is equipped with a plurality of control valve, the control valve is used for controlling the suction or the discharge of liquid when the plunger moves.
According to the invention, the linear motor is directly connected with the plunger, and the linear motor drives the plunger to do reciprocating linear motion, so that parts such as a crankshaft connecting rod mechanism and the like in a conventional fracturing pump are omitted, the structure of the fracturing pump is simplified, the reliability and the transmission efficiency of the fracturing pump are effectively improved, the linear motor runs stably and has constant speed, the pulsation of output flow and pressure is basically eliminated theoretically, and meanwhile, the stroke of the linear motor can be lengthened, so that the requirements of low impulse number and large displacement are met, and the vibration of the whole pump and the consumption of a hydraulic end wearing part are reduced.
As a preferred scheme of the present invention, the linear motor is a double-end driving structure, two hydraulic ends are correspondingly located at two ends of the linear motor, and two ends of each linear motor are correspondingly connected with the plungers at the two hydraulic ends. Through the linear motor adopting the double-end driving structure, the two ends of each linear motor are correspondingly connected with the plungers on the two hydraulic ends, so that the reciprocating stroke of the linear motor can apply work to drive the plungers on the two hydraulic ends to work, and the flow and the efficiency of the fracturing pump are improved.
As a preferable scheme of the invention, the fracturing pump further comprises a buffer device for reducing reversing impact of the linear motor, wherein the buffer device is arranged between the hydraulic end and the linear motor and is positioned at the position where two ends of the linear motor are reversed.
As a preferable aspect of the present invention, the hydraulic end corresponds to one of the buffer devices.
As a preferable aspect of the present invention, each of the plungers corresponds to one of the damper devices.
As a preferable aspect of the present invention, the number of the plungers on the fluid end is an odd number, and is at least three, and the number of the linear motors is the same as the number of the plungers. By arranging an odd number of plungers at each hydraulic end, the fracturing pump can run smoothly.
As a preferable aspect of the present invention, the number of the plungers on the fluid end is five, and the number of the linear motors is five.
As a preferable aspect of the present invention, the moving directions of all the linear motors are set to the same phase angle difference as the crank shaft. So set up, all linear electric motor do not move left or right in step, can be so that the atress of two hydraulic ends is balanced, and whole fracturing pump motion is more steady.
As a preferable scheme of the present invention, two control valves are disposed at the other end of the hydraulic end, and the control valves are one-way valves. Each plunger on the hydraulic end is correspondingly provided with two one-way valves, and when the linear motor drives the plungers to do reciprocating linear motion, the functions of low-pressure suction and high-pressure discharge of liquid are realized through the opening and closing of the one-way valves.
As a preferable aspect of the present invention, the stroke of the linear motor is greater than or equal to 12 ". Therefore, the requirements of low stroke number and large displacement can be met, and the vibration of the whole pump and the consumption of the wearing parts at the hydraulic end are reduced.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the linear motor is directly connected with the plunger, and the plunger is driven by the linear motor to do reciprocating linear motion, so that parts such as a crankshaft connecting rod mechanism and the like in a conventional fracturing pump are omitted, the structure of the fracturing pump is simplified, the reliability and the transmission efficiency of the fracturing pump are effectively improved, the linear motor runs stably and has constant speed, the pulsation of output flow and pressure is basically eliminated theoretically, and meanwhile, as the stroke of the linear motor can be lengthened, the requirements of low impulse number and large displacement are met, and meanwhile, the vibration of the whole pump and the consumption of a hydraulic end wearing part are reduced;
2. according to the invention, the linear motors with double-end driving structures are adopted, and two ends of each linear motor are correspondingly connected with the plungers on the two hydraulic ends, so that the reciprocating stroke of each linear motor can do work to drive the plungers on the two hydraulic ends to work, and the flow and the efficiency of the fracturing pump can be improved.
Drawings
Fig. 1 is a schematic diagram of a fracturing pump driven by a linear motor in the invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
The labels in the figure are: 1-a hydraulic end, 2-a buffer device, 3-a linear motor, 4-a plunger and 5-a control valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a fracturing pump driven by a linear motor;
as shown in fig. 1 and 2, the fracturing pump driven by the linear motor in this embodiment includes at least one fluid end 1, wherein one end of each fluid end 1 is provided with a plurality of plungers 4 side by side, each plunger 4 is correspondingly connected with one linear motor 3, all the linear motors 3 are arranged side by side corresponding to the plungers 4, the linear motors 3 drive the plungers 4 to perform reciprocating linear motion, the other end of the fluid end 1 is further provided with a plurality of control valves 5, and the control valves 5 are used for controlling the suction or discharge of liquid when the plungers 4 move.
According to the invention, the linear motor is directly connected with the plunger, and the plunger is driven by the linear motor to do reciprocating linear motion, so that parts such as a crankshaft connecting rod mechanism and the like in a conventional fracturing pump are omitted, the structure of the fracturing pump is simplified, the reliability and the transmission efficiency of the fracturing pump are effectively improved, the linear motor runs stably and has constant speed, the pulsation of output flow and pressure is basically eliminated theoretically, and meanwhile, as the stroke of the linear motor can be lengthened, the requirements of low impulse number and large displacement are met, and meanwhile, the vibration of the whole pump and the consumption of a hydraulic end wearing part are reduced; because the plunger is driven to do reciprocating linear motion by adopting electric power through the linear motor, compared with a conventional fracturing pump driven by diesel oil, the fracturing pump has the advantages of low noise, no exhaust emission pollution and lower use cost compared with the diesel oil.
It should be noted that, a cavity adapted to the plunger 4 is disposed on the hydraulic end 1, and the linear motor 3 drives the plunger 4 to make a reciprocating linear motion in the cavity. When the linear motor 3 pulls out the plunger 4, low-pressure liquid is sucked into the cavity, and when the linear motor 3 drives the plunger 4 to retract, the plunger 4 can compress the liquid in the cavity, so that a high-pressure liquid discharge cavity is formed.
In this embodiment, linear electric motor 3 is bi-polar drive structure, fluid end 1 has two and corresponds and is located linear electric motor 3 both ends, and the both ends of every linear electric motor 3 correspond with plunger 4 on two fluid end 1 and link to each other. Through the linear motor adopting the double-end driving structure, the two ends of each linear motor are correspondingly connected with the plungers on the two hydraulic ends, so that the reciprocating stroke of the linear motor can apply work to drive the plungers on the two hydraulic ends to work, and the flow and the efficiency of the fracturing pump are improved.
In this embodiment, the fracturing pump further comprises a buffer device 2 for reducing the reversing impact of the linear motor 3, wherein the buffer device 2 is arranged between the hydraulic end 1 and the linear motor 3 and is located at the reversing position of the two ends of the linear motor. Specifically, the damping device is fixedly mounted on the sleeve outside the plunger, and the plunger slidably passes through the damping device. Preferably, the hydraulic end corresponds to one of the damping devices, and each end of all the linear motors 3 shares one damping device 2, that is, the damping devices are an integral body, and in this case, there are two damping devices 2. By such an arrangement, the mounting work of the buffer device can be reduced. The specific structure of the buffer device is the prior art, and is not described herein again.
In this embodiment, the number of the plungers 4 on the fluid end 1 is odd, and is at least three, and the number of the linear motors 3 is the same as that of the plungers 4. By arranging an odd number of plungers on each hydraulic end, the stable operation of the fracturing pump is facilitated. Preferably, the number of the plungers 4 on the fluid end 1 is five, and the number of the linear motors 3 is five correspondingly. Further, the movement direction of the five linear motors 3 is set to be the same as the phase angle difference value of the crankshaft, namely the five linear motors do not synchronously move leftwards or rightwards, so that the stress of the two hydraulic ends is balanced, and the whole fracturing pump moves more stably. Specifically, the movement directions of the five linear motors 3 can be controlled by a program to reach the same phase angle difference value as the crankshaft, so that the discharge pressure of the pump is stable.
In this embodiment, the other end of the hydraulic end 1 is provided with two control valves 5, the control valves 5 are one-way valves, each plunger 4 is correspondingly provided with two one-way valves, and when the plunger moves to two limit positions, the two control valves are correspondingly opened or closed, so that the liquid suction or liquid discharge function is realized. Each plunger on the hydraulic end is correspondingly provided with two one-way valves, and when the linear motor drives the plungers to do reciprocating linear motion, the functions of low-pressure suction and high-pressure discharge of liquid are realized through the opening and closing of the one-way valves.
In the present embodiment, the stroke of the linear motor 3 is 12 ″ or more. Therefore, the requirements of low stroke number and large displacement can be met, and the vibration of the whole pump and the consumption of the wearing parts at the hydraulic end are reduced.
Example 2
The difference between this embodiment and embodiment 1 is that each plunger corresponds to one of the damping devices, i.e. the damping device is processed into a small independent body.
Example 3
The present embodiment is different from embodiment 1 or embodiment 2 in that the number of the plungers 4 on the fluid end 1 is three or seven, and the number of the linear motors 3 is three or seven.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The fracturing pump driven by the linear motor is characterized by comprising at least one hydraulic end, wherein one end of each hydraulic end is provided with a plurality of plungers side by side, each plunger is correspondingly connected with one linear motor, the linear motor drives the plungers to do reciprocating linear motion, the other end of each hydraulic end is also provided with a plurality of control valves, the control valves are used for controlling the suction or discharge of liquid during the motion of the plungers, the fracturing pump further comprises a buffer device used for reducing the reversing impact of the linear motor, the buffer device is arranged between the hydraulic end and the linear motor and positioned at the reversing positions at the two ends of the linear motor, the buffer device is fixedly arranged on a sleeve outside the plungers, the plungers slide to penetrate through the buffer device, the hydraulic end corresponds to one buffer device, and the motion directions of all the linear motors do not move leftwards or rightwards synchronously, the stroke of the linear motor is greater than or equal to 12 ".
2. The fracturing pump driven by a linear motor according to claim 1, wherein the linear motor is of a double-end driving structure, two hydraulic ends are correspondingly arranged at two ends of the linear motor, and two ends of each linear motor are correspondingly connected with the plungers at the two hydraulic ends.
3. The linear motor driven fracturing pump of any of claims 1 to 2, wherein the number of said plungers on said fluid end is an odd number and at least three, and the number of said linear motors is the same as the number of said plungers.
4. The linear motor driven fracturing pump of claim 3, wherein the number of plungers on the fluid end is five, corresponding to five.
5. The fracturing pump driven by a linear motor according to claim 4, wherein two control valves are arranged at the other end of the hydraulic end, and the control valves are one-way valves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338835.3A CN111648933B (en) | 2020-04-26 | 2020-04-26 | Fracturing pump driven by linear motor |
| PCT/CN2021/085874 WO2021218585A1 (en) | 2020-04-26 | 2021-04-08 | Linear motor-driven fracturing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338835.3A CN111648933B (en) | 2020-04-26 | 2020-04-26 | Fracturing pump driven by linear motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111648933A CN111648933A (en) | 2020-09-11 |
| CN111648933B true CN111648933B (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010338835.3A Active CN111648933B (en) | 2020-04-26 | 2020-04-26 | Fracturing pump driven by linear motor |
Country Status (2)
| Country | Link |
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| CN (1) | CN111648933B (en) |
| WO (1) | WO2021218585A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648933B (en) * | 2020-04-26 | 2021-04-06 | 四川宏华石油设备有限公司 | Fracturing pump driven by linear motor |
| CN113974782A (en) * | 2021-11-10 | 2022-01-28 | 山东华博电气有限公司 | Water jet medical pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH544229A (en) * | 1972-09-18 | 1973-11-15 | Haeny & Cie | Hydraulic or pneumatic cylinder-piston device |
| CN2740803Y (en) * | 2004-10-10 | 2005-11-16 | 西南石油学院 | Reciprocating pump driven by linear electric motor |
| CN2898356Y (en) * | 2006-02-27 | 2007-05-09 | 西南石油学院 | Two-action and multi-cylinder reciprocating pump driven by linear motor |
| CN203297049U (en) * | 2013-01-30 | 2013-11-20 | 湖北中油科昊机械制造有限公司 | Novel coal bed gas fracturing pump |
| US10443362B2 (en) * | 2015-05-26 | 2019-10-15 | Baker Hughes Incorporated | Systems and methods for controlling downhole linear motors |
| CN108757374B (en) * | 2018-06-05 | 2019-08-30 | 华中科技大学 | Two-sided permanent magnet straight line motor drive type plunger pump |
| CN110094320A (en) * | 2019-05-08 | 2019-08-06 | 北京理工大学 | A kind of two-cylinder type linear compressor |
| CN110454352A (en) * | 2019-08-27 | 2019-11-15 | 烟台杰瑞石油装备技术有限公司 | A kind of straight line motor drive type plunger pump |
| CN111648933B (en) * | 2020-04-26 | 2021-04-06 | 四川宏华石油设备有限公司 | Fracturing pump driven by linear motor |
-
2020
- 2020-04-26 CN CN202010338835.3A patent/CN111648933B/en active Active
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2021
- 2021-04-08 WO PCT/CN2021/085874 patent/WO2021218585A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN111648933A (en) | 2020-09-11 |
| WO2021218585A1 (en) | 2021-11-04 |
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