CN213093946U

CN213093946U - Built-in load sensor butterfly screw pump directly drives motor

Info

Publication number: CN213093946U
Application number: CN202022384461.7U
Authority: CN
Inventors: 梁笃; 马强; 杨晓川
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-04-30
Anticipated expiration: 2030-10-23

Abstract

The utility model provides a built-in load sensor butterfly screw pump directly drives motor, includes motor housing, upper end cover, lower end cover, stator module, rotor subassembly, hollow shaft and motor bearing seat, its characterized in that: the upper end of the motor shell is connected with the upper end cover, the lower end of the motor shell is connected with the lower end cover, the upper end cover is internally provided with an upper bearing, the lower end cover is internally provided with a lower bearing, the hollow shaft is supported by the upper bearing and the lower bearing and penetrates through the motor shell, the periphery of the hollow shaft is provided with a rotor framework, the rotor assembly is arranged on the rotor framework, the stator assembly is arranged in the motor shell positioned on the periphery of the rotor assembly, the lower end of the lower end cover is connected with a motor bearing seat, a bearing matched with the hollow shaft is arranged. The utility model discloses a motor reverses dynamic braking mode, utilizes the motor to reverse the electricity generation of stator and rotor, and through the moment of torsion and the speed that reverses of switch board control motor, the constant speed is unloaded the oil-well and is reversed the moment of torsion, the parking braking of safety and stability's completion screw pump well.

Description

Built-in load sensor butterfly screw pump directly drives motor

Technical Field

The utility model relates to a special ground drive equipment of oil field screw pump well, especially a built-in load sensor butterfly screw pump directly drive motor.

Background

In the prior oil field production, the ground driving device of the screw pump well is a driving device for mechanical reduction of gears, and the mechanical reduction is needed to reduce the rotating speed of a motor and increase the torque of the motor. The screw pump is in normal production operation and needs to be stopped and reversed to ensure safe operation after shutdown. The conventional mechanical driving equipment has the brake functions of ratchet wheel reverse preventing, hydraulic brake reverse preventing, manual stopping brake reverse preventing and the like, and has high operation noise and complicated structure. The shutdown reverse rotation prevention brake is a mechanical contact brake, a brake failure state exists, and serious accidents of casualties and equipment damage are caused when the brake failure is seriously reversed. And because the gear reduction box is in transmission with the belt, the work maintenance load of the equipment is large.

Disclosure of Invention

Not enough to above-mentioned technical problem exists, the utility model aims to provide a built-in load sensor butterfly screw pump directly drives motor.

The utility model provides a built-in load sensor butterfly screw pump directly drives motor, includes motor housing, upper end cover, lower end cover, stator module, rotor subassembly, hollow shaft and motor bearing seat, its characterized in that: the motor comprises a motor shell, a rotor assembly, a rotor, a stator assembly and a stator winding, wherein the upper end of the motor shell is connected with an upper end cover, the lower end of the motor shell is connected with a lower end cover, an upper bearing is arranged in the upper end cover, a lower bearing is arranged in the lower end cover, a hollow shaft is supported by the upper bearing and the lower bearing and penetrates through the motor shell, a rotor framework is arranged on the periphery of the hollow shaft, the rotor assembly is arranged on the rotor framework, the rotor assembly comprises a rotor iron core and a rotor permanent magnet embedded in the rotor iron core, the stator assembly is arranged in the motor shell positioned on the periphery of the rotor assembly, the stator assembly; the lower end of the lower end cover is connected with a motor bearing seat, a bearing matched with the hollow shaft is arranged in the motor bearing seat, and a load sensor is arranged below the bearing.

The upper bearing cover is arranged above the bearing, the upper bearing cover is arranged at the positioning position of the lower end of the hollow shaft, the upper bearing cover is tightly matched with the bearing, the lower bearing cover is pressed into the load sensor, the load sensor is arranged in the motor bearing seat, and the lower bearing cover is arranged below the bearing and is tightly matched with the bearing.

The arc surface of the outer side of the upper cover of the bearing is tightly attached to the arc surface of the inner side of the bearing, and the arc surface of the outer side of the bearing is tightly attached to the arc surface of the inner side of the lower cover of the bearing.

And a polish rod is inserted in the hollow shaft, penetrates through the motor bearing seat until reaching the hollow shaft, penetrates out of the pressing cap, and is clamped tightly through a fastening square clamp.

The pressing cap is arranged at the upper end of the hollow shaft, a square clamp is arranged above the pressing cap, and the polish rod is clamped by fastening a bolt on the square clamp to prevent the polish rod from being separated from the hollow shaft.

The motor is connected with the control cabinet through a circuit, the power supply of the control cabinet is switched on, the motor is started to work, the motor drives the polished rod to rotate, and the polished rod transmits driving torque to the screw pump at the bottom of the well to complete oil extraction operation of the oil well.

The whole load of the oil well transmits force to a hollow shaft of the motor through a polished rod, the hollow shaft of the motor transmits the force to a load sensor arranged in a motor bearing seat through a bearing in the motor bearing seat, the load sensor measures the working load of the whole oil well, transmits the working load to the control cabinet and displays the working load on a screen of the control cabinet; the rotating speed driven by the motor is the working rotating speed of the oil well; the driving torque of the motor is the working torque of the oil well, so that three working parameters of the screw pump well can be obtained: the torque, the load and the rotating speed can timely detect, measure and display the production state, the running state and the fault state of the oil well.

The motor stator winding generates electromagnetic force after being electrified, the stator winding and the rotor permanent magnet interact to generate electromagnetic force, the motor transmits driving torque of the motor to the polished rod through the electromagnetic force of the stator and the rotor, the screw pump well drives the rotor of the motor to rotate reversely when the well is stopped and rotates reversely, the rotor of the motor cuts the stator winding through the magnetic field of the rotor permanent magnet to generate electricity, electromagnetic braking torque is generated, the reverse torque is discharged through the control cabinet, energy consumption braking of the motor is achieved, and non-contact braking can be achieved through the electromagnetic force transmission between the stator and the rotor.

The motor is a 60-antipodal butterfly permanent magnet synchronous motor, the diameter of the motor is 800mm, and enough working space is reserved at the top of the motor.

The utility model discloses a direct drive mode work of motor, no mechanical speed reduction process, when the oil well normally parks and unloads and reverses, what adopt is that the motor reverses the dynamic braking mode, utilizes the motor to reverse the electricity generation of stator and rotor, through the reversing moment of torsion and the speed of switch board control motor, the constant speed unloads the oil drain and reverses the moment of torsion, the parking braking of safe and stable completion screw pump well. The dynamic braking brake of the direct drive motor is a non-contact brake, and the direct drive motor works stably and reliably, and is safe and reliable because the phenomena of abrasion and mechanism failure do not exist in the non-contact mode. The utility model discloses an increase the number of pole pairs and the fuselage diameter of motor, realize the speed governing scope of low-speed 0-200 rpm, the big moment of torsion drive moment of 600N/m-3000N/m, the whole equipment does not have mechanical reduction gears, uses the motor to accomplish low-speed, big moment of torsion, wide range directly to drive the speed governing work.

Drawings

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

fig. 2 is a schematic structural view after the polish rod penetrates the present invention.

In the figure: the motor comprises a stator iron core 1, a stator winding 2, a rotor permanent magnet 3, a rotor iron core 4, a motor shell 5, a rotor framework 6, an upper end cover 7, a lower end cover 8, a hollow shaft 9, a bearing upper cover 10, a motor bearing seat 11, a load sensor 12, a polish rod 13, a square clamp 14, a press cap 15, a bearing lower cover 16, an upper bearing 17, a lower bearing 18 and a bearing 19.

Detailed Description

The following is further explained with reference to fig. 1 and fig. 2: the stator winding 2 is embedded into the stator core 1 to form a stator assembly of the motor, and the stator assembly is pressed into the motor shell 5. And the rotor permanent magnet 3 is embedded into the rotor iron core 4 to form a rotor assembly, and the rotor assembly is pressed into the rotor framework 6 to complete the stator and rotor assembly of the motor. The rotor framework 6 is pressed into the hollow shaft 9 to a positioning position, the motor shell 5 and the motor lower end cover 8 are assembled and molded, the hollow shaft 9 is arranged at the positioning position from the motor shell 5 to the motor lower end cover 8, the motor upper end cover 7 is assembled at the positioning position from the motor upper end cover 5, the upper bearing 17 is arranged in the upper end cover 7, the lower bearing 18 is arranged in the lower end cover 8, and the hollow shaft 9 is supported by the upper bearing 17 and the lower bearing 18 to complete the assembly of the motor main body.

Pressing the bearing upper cover 10 into the positioning position of the lower end of the hollow shaft 9, pressing the bearing lower cover 16 into the load sensor 12, pressing the load sensor 12 into the inner bottom of the motor bearing seat 11, placing the bearing 19 between the bearing upper cover 10 and the bearing lower cover 16, closely attaching the bearing upper cover 10 and the bearing lower cover 16, finally installing the motor bearing seat 11 into the positioning position of the motor lower cover 8, and completing the whole assembly of the direct-drive motor of the butterfly screw pump.

As shown in figure 2, a screw pump polished rod 13 penetrates into the hollow shaft 9 and penetrates out of the pressing cap 15, the square clamp 14 is fastened, the polished rod is clamped, and the field assembly work of the direct-drive motor driving device of the butterfly screw pump is completed.

The motor is connected with the control cabinet to start the motor to work, the motor drives the polished rod 13 to rotate, the polished rod transmits driving torque to the screw pump at the bottom of the well to rotate so as to realize oil well production, and during normal production, display parameters on the control cabinet are working parameters, torque, load and rotating speed of the screw pump well.

The motor is a 60-pair-pole butterfly permanent magnet synchronous motor, the butterfly permanent magnet synchronous motor transmits the driving torque of the motor to the polished rod 13 through the electromagnetic force of the stator and the rotor, so that the rotor of the motor is driven to rotate reversely when the screw pump well stops and rotates reversely, the rotor of the motor cuts the reverse torque through the magnetic field of the rotor permanent magnet 3 to generate electricity through the stator winding 2, an electromagnetic braking torque is generated, the reverse torque is discharged through the control cabinet, the energy consumption braking of the motor is realized, and the stator and the rotor are transmitted through the electromagnetic force, so that the non-contact braking can be realized.

The whole load of the oil well transmits the force to the hollow shaft 9 of the motor through the polished rod 13, the hollow shaft 9 of the motor transmits the force to the load sensor 12 arranged in the motor bearing seat 11 through the bearing 19 in the motor bearing seat 11, and the load sensor 12 measures the working load of the whole oil well. The driving rotating speed of the butterfly permanent magnet synchronous motor is the working rotating speed of the oil well, the driving torque of the motor is the working torque of the oil well, and then the real-time working load of the oil well is measured through a load sensor arranged in the butterfly permanent magnet synchronous motor and the load sensor arranged in the butterfly permanent magnet synchronous motor. Three important operating parameters of the screw pump well are thus available: the torque, the load and the rotating speed can detect, measure and display the production state, the running state and the fault state of the oil well in time to guide the rapid production of the oil well.

Claims

1. The utility model provides a built-in load sensor butterfly screw pump directly drives motor, includes motor casing (5), upper end cover (7), bottom end cover (8), stator module, rotor subassembly, hollow shaft (9) and motor bearing seat (11), its characterized in that: the upper end of the motor shell (5) is connected with an upper end cover (7), the lower end is connected with a lower end cover (8), an upper bearing (17) is arranged in the upper end cover (7), a lower bearing (18) is arranged in the lower end cover (8), the hollow shaft (9) is supported by the upper bearing (17) and the lower bearing (18) and penetrates through the motor shell (5), a rotor framework (6) is arranged at the periphery of the hollow shaft (9), a rotor component is arranged on the rotor framework (6), the rotor assembly comprises a rotor iron core (4) and a rotor permanent magnet (3) embedded in the rotor iron core (4), the stator assembly is arranged in a motor shell (5) positioned at the periphery of the rotor assembly, the stator assembly comprises a stator core (1) and a stator winding (2) embedded in the stator core (1), and the tail end of the stator winding (2) is connected with a power line of the control cabinet;

the lower end of the lower end cover (8) is connected with a motor bearing seat (11), a bearing (19) matched with the hollow shaft (9) is arranged in the motor bearing seat (11), and a load sensor (12) is arranged below the bearing (19).

2. The built-in load sensor butterfly screw pump direct drive motor of claim 1, characterized in that: a bearing upper cover (10) is arranged above a bearing (19), the bearing upper cover (10) is installed at the lower end positioning position of a hollow shaft (9), the bearing upper cover (10) is tightly matched with the bearing (19), a bearing lower cover (16) is pressed into a load sensor (12), the load sensor (12) is installed in a motor bearing seat (11), and the bearing lower cover (16) is arranged below the bearing (19) and tightly matched with the bearing (19).

3. The built-in load sensor butterfly screw pump direct drive motor of claim 2, characterized in that: the arc surface on the outer side of the upper bearing cover (10) is tightly attached to the arc surface on the inner side of the bearing (19), and the arc surface on the outer side of the bearing (19) is tightly attached to the arc surface on the inner side of the lower bearing cover (16).

4. The built-in load sensor butterfly screw pump direct drive motor of claim 2, characterized in that: a polish rod (13) is inserted in the hollow shaft (9), and the polish rod (13) penetrates through the motor bearing seat (11) until reaching the hollow shaft (9), penetrates out of the pressing cap (15), and is clamped by a fastening square clamp (14).

5. The built-in load sensor butterfly screw pump direct drive motor of claim 4, characterized in that: the pressure cap (15) is installed at the upper end of the hollow shaft (9), a square clamp (14) is arranged above the pressure cap (15), and the polish rod (13) is clamped by fastening a bolt on the square clamp (14) to prevent the polish rod (13) from being separated from the hollow shaft (9).

6. The built-in load sensor butterfly screw pump direct drive motor of claim 1, characterized in that: the motor is a 60-antipodal butterfly permanent magnet synchronous motor, and the diameter of the motor is 800 mm.