CN211481017U - Small-diameter submersible special permanent magnet synchronous motor - Google Patents
Small-diameter submersible special permanent magnet synchronous motor Download PDFInfo
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- CN211481017U CN211481017U CN202020438409.2U CN202020438409U CN211481017U CN 211481017 U CN211481017 U CN 211481017U CN 202020438409 U CN202020438409 U CN 202020438409U CN 211481017 U CN211481017 U CN 211481017U
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Abstract
The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor special for small-diameter oil submersible, which is characterized in that in the specific operation of the existing motor, the special small-diameter submersible permanent magnet synchronous motor which cannot smoothly pass through and has low power because of the matching work with a thickened sleeve comprises a motor shell, a motor stator, magnetic steel and a motor rotor, wherein the outer diameter of the motor shell is designed to be not more than 108mm, a stator groove on the motor stator is trapezoidal, one end of the stator slot close to the magnetic steel is an arc with an opening, the arc corresponds to a circle with the diameter of 2mm, the magnetic steel is in the shape of a tile with bevel edges at the left side and the right side and arc-shaped at the upper side and the lower side, the groove shape of the upper surface of the motor rotor is in the shape of a dovetail and keeps a distance of not less than 5mm with a thickened sleeve, the magnetic steel smoothly passes through and utilizes the permanent magnet synchronous motor to improve power, and the magnetic steel has a good development prospect in the technical field of the permanent magnet synchronous motor.
Description
Technical Field
The utility model relates to a PMSM technical field especially relates to the special PMSM of diving of minor diameter.
Background
At present, oil wells of oil fields mainly have various specifications such as 5 inches, 5-1/2 inches, 7 inches and the like, wherein oil wells with 5-1/2 inches of casing are the most common, the inner diameter of the casing is about 124mm generally, the outer diameter of a conventional submersible motor is 114mm, the distance between the motor and the inner wall of the casing is greater than 4mm generally, so that the motor can be ensured to pass through smoothly when going down the well, but part of the oil wells adopt thickened casings for increasing the strength of the casing or performing anticorrosion treatment, the inner diameter is about 118mm, if the motor with the conventional 114mm outer diameter is adopted, the distance between the motor and the inner wall of the casing is not greater than 4mm, the oil wells are difficult.
Therefore, the motor with the outer diameter smaller than 110mm can be smoothly lowered to the pump hanging position, and meanwhile, the conventional submersible motor adopts a mode of adding a reducer to an asynchronous motor, so that the defects of low motor efficiency, large heat productivity, small starting torque and the like exist, and therefore, a specific motor which can well meet the requirements of various aspects of underground oil extraction is needed.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming prior art's defect, the utility model provides a special PMSM is dived to minor diameter solves current motor in specific operation, need with thickening sleeve pipe cooperation work lead to can not pass through smoothly and the problem that power is low.
The technical scheme is that the small-diameter special permanent magnet synchronous motor for oil submersible comprises a motor shell, a motor stator, magnetic steel and a motor rotor, wherein the outer diameter of the motor shell is designed to be not more than 108mm, the length of the motor is controlled within 10 meters, the motor shell can be placed into a casing to ensure that the distance between the motor shell and an oil well casing is not less than 5mm, the motor shell can smoothly pass through a shaft with the inner diameter of more than 118mm, a stator slot on the motor stator is trapezoidal, the trapezoidal slot shape has larger offline space compared with a circular shape, the wire diameter can be thickened, the coil impedance is reduced, the copper loss is effectively reduced while the magnetic field intensity is increased, the heat productivity is reduced, an arc with an opening is arranged at one end of the stator slot close to the magnetic steel, a lead is fed through the opening, the arc corresponds to a circle with the diameter of 2mm, the left side edge and the right side edge and the upper side edge, the magnetic steel is matched with the surface groove shape of the motor rotor, the magnetic steel is effectively fixed and is not easy to fall off, the magnetic steel adopts a neodymium iron boron permanent magnet with large magnetic flux density, the power density is larger compared with that generated by other materials in unit area, the design rotating speed of the motor is 300Rpm, and the stepless speed regulation can be carried out within the range of 0-600 Rpm.
Furthermore, the number of the stator slots is 18, the number of the rotor poles is 16, and the combined design optimizes the distribution of the stator winding and the magnetic field, so that the magnetic flux generated in unit area is maximum, the motor can generate larger starting torque, and the efficiency is improved.
Furthermore, the motor stator punching sheet adopts DW470 type silicon steel sheets with small iron loss.
The technical effect of the utility model is that, the design of motor casing external diameter is for being not more than 108mm, can guarantee not less than 5mm with the sheathed tube interval of oil well behind the casing of putting into under the motor casing, can be very smooth through the internal diameter for the thickening pit shaft more than 118mm, under the condition that has reduced the motor external diameter, the stator groove number is 18 grooves, the rotor pole number is 16 utmost point combinations, magnetic flux density and magnet steel intensity have been increased, stator iron loss and coil copper loss have been reduced, make the motor obtain higher power density and littleer heat loss, motor efficiency obtains promoting, compare with asynchronous machine and have the speed governing scope wide, the starting torque is big, advantages such as efficient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
1. The motor comprises a motor shell, 2 motor stators, 3 magnetic steel and 4 motor rotors.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: the permanent magnet synchronous motor special for small-diameter submersible comprises a motor shell 1, a motor stator 2, magnetic steel 3 and a motor rotor 4, wherein the outer diameter of the motor shell 1 is designed to be not more than 108mm, the length of the motor is controlled within 10 meters, the motor shell can be ensured to be not less than 5mm away from an oil well casing after being put into the casing, the motor shell can smoothly pass through a shaft with the inner diameter of more than 118mm, a motor stator punching sheet adopts DW470 type silicon steel sheet with smaller iron loss, a stator groove on the motor stator is trapezoidal, the trapezoidal groove shape has larger offline space compared with the circular shape, the wire diameter can be thickened, the coil impedance is reduced, the copper loss is effectively reduced while the magnetic field intensity is increased, the calorific value is reduced, one end of the stator groove close to the magnetic steel 3 is an arc with an opening, the opening is used for leading in a lead, the arc corresponds to a circle with the diameter of 2mm, the magnetic steel is in the shape of a bevel edge, the slot shape of the upper surface of the motor rotor is in a dovetail shape, the magnetic steel is matched with the slot shape of the surface of the motor rotor, the magnetic steel is effectively fixed and is not easy to fall off, the number of the stator slots is 18, the number of the rotor poles is 16, the combined design ensures that the motor can generate large starting torque, the efficiency is improved, the magnetic steel adopts a neodymium iron boron permanent magnet with large magnetic flux density, the power density generated by unit area of other materials is larger, the designed rotating speed of the motor is 300Rpm, and the stepless speed regulation can be carried out within the range of 0-600 Rpm.
The technical effect of the utility model is that, the design of motor casing external diameter is for being not more than 108mm, can guarantee not less than 5mm with the sheathed tube interval of oil well behind the casing of putting into under the motor casing, can be very smooth through the internal diameter for the thickening pit shaft more than 118mm, under the condition that has reduced the motor external diameter, the stator groove number is 18 grooves, the rotor pole number is 16 utmost point combinations, this combination design has optimized stator winding and magnetic field distribution, the magnetic flux that makes the unit area produce is the biggest, magnetic flux density and magnet steel intensity have been increased, stator iron loss and coil copper loss have been reduced, make the motor obtain higher power density and littleer heat loss, motor efficiency obtains promoting, compare with asynchronous machine and have the speed governing scope wide, the starting torque is big, advantages such as efficient.
The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the invention, which should also be considered as within the scope of the invention.
Claims (3)
1. The special permanent magnet synchronous motor for the small-diameter oil submersible comprises a motor shell (1), a motor stator (2), magnetic steel (3) and a motor rotor (4), and is characterized in that the outer diameter of the motor shell (1) is designed to be not more than 108mm, a stator groove on the motor stator is trapezoidal, one end of the stator groove close to the magnetic steel (3) is an arc with an opening, the magnetic steel is in a shape of an inclined edge, an upper side edge and a lower side edge of the magnetic steel are arc-shaped tile-shaped, and the groove shape of the upper surface of the motor rotor is in a dovetail shape.
2. The small-diameter submersible special permanent magnet synchronous motor according to claim 1, characterized in that the number of stator slots is 18 slots, and the number of rotor poles is 16 poles.
3. The small-diameter submersible special permanent magnet synchronous motor according to claim 1, characterized in that the motor stator punching sheet is made of DW470 type silicon steel sheet with small iron loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438409.2U CN211481017U (en) | 2020-03-31 | 2020-03-31 | Small-diameter submersible special permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438409.2U CN211481017U (en) | 2020-03-31 | 2020-03-31 | Small-diameter submersible special permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211481017U true CN211481017U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020438409.2U Active CN211481017U (en) | 2020-03-31 | 2020-03-31 | Small-diameter submersible special permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211481017U (en) |
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2020
- 2020-03-31 CN CN202020438409.2U patent/CN211481017U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Special permanent magnet synchronous motor for small diameter submersible Effective date of registration: 20220304 Granted publication date: 20200911 Pledgee: Xinxiang Sanxing Petroleum Technology Co.,Ltd. Pledgor: XINXIANG CITY XIAFENG ELECTRICAL APPLIANCES Co.,Ltd. Registration number: Y2022980002198 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |