CN113726061A - Stator slot wedge and wet stator submersible motor using same - Google Patents
Stator slot wedge and wet stator submersible motor using same Download PDFInfo
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- CN113726061A CN113726061A CN202111059508.5A CN202111059508A CN113726061A CN 113726061 A CN113726061 A CN 113726061A CN 202111059508 A CN202111059508 A CN 202111059508A CN 113726061 A CN113726061 A CN 113726061A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention relates to the technical field of submersible pumps, in particular to a stator slot wedge which comprises a blocking assembly assembled in a stator slot, wherein the blocking assembly is provided with a eave-shaped blocking piece which is formed by the parts of the blocking assembly extending out of two axial ends of a stator core, the length of the blocking piece along the axial direction of the stator core is more than or equal to 2 times of the thickness of a rotor end ring, the thickness direction of the rotor end ring is consistent with the axial direction of the stator core, and the rotor end ring is assembled at the two axial ends of the rotor core. The invention also provides a wet stator submersible motor applying the stator slot wedge. Through adopting above-mentioned scheme can hinder rotor end ring department rivers erosion stator coil's insulation, extension stator coil's life guarantees the winding reliable operation.
Description
Technical Field
The invention relates to the technical field of submersible pumps, in particular to a stator slot wedge and a wet stator submersible motor using the same.
Background
At present, there is a wet stator submersible motor, referring to fig. 1, a rotor core 40 is concentrically arranged in an inner cavity of a stator core 50, a stator slot 51 for assembling a stator coil 60 is provided on an inner annular wall of the stator core 50, a slot length direction of the stator slot 51 is consistent with an axial direction of the stator core, a notch 511 of the stator slot 51 is arranged pointing to the rotor core 40, the stator slot 51 is arranged in an array along a circumferential direction of the stator core 50, a part of the stator coil 60 extends out of the stator core 50 along the axial direction of the stator core 50, so that a part of the stator coil 60 is exposed out of the stator core 50 at both end parts of the stator core 50. The rotor core 40 is fitted at both axial ends with rotor end rings 41, and the rotor end rings 41 are arranged corresponding to the portions of the stator coils 60 protruding out of the stator core 50. When the motor rotates, water in the cavity is driven to rotate due to the rotation of the rotor core 40, centrifugal force is generated, water flow at the position of the rotor end ring 41 impacts the stator coil 60 to extend out of the two axial ends of the stator core 50 due to the centrifugal force, and therefore the insulation of the stator coil 60 is easily damaged, and unit faults are caused.
Disclosure of Invention
An object of the present invention is to provide a stator slot wedge which can be used to prevent the insulation of a stator coil protruding outside a stator core from being eroded by water flow; the invention also aims to provide a wet stator submersible motor applying the stator slot wedge, which can prevent water flow at the end ring of the rotor from eroding the insulation of the stator coil and prolong the service life of the stator coil.
The technical scheme adopted by the invention is as follows.
The stator slot wedge comprises a blocking component assembled in a stator slot, wherein the blocking component extends out of two axial ends of a stator core to form an eave-shaped blocking piece, and the length of the blocking piece at one axial end of the stator core along the axial direction of the stator core is recorded as LzThe thickness of the rotor end ring at one axial end of the rotor core is recorded as LdWhen the rotation speed of the motor is n, the
The rotor end rings are assembled at two axial ends of the rotor core, and the thickness direction of the rotor end rings is consistent with the axial direction of the stator core.
Preferably, the blocking assembly has a plug connector for making a plug fit with the slot opening of the stator slot.
Preferably, the plug connector is formed by connecting an embedding part and a limiting part, the embedding part is used for being clamped in the groove, and the limiting part is used for limiting the inserting position of the embedding part in the groove.
Preferably, the limiting part is formed by a limiting plate body, and the embedding part is formed by a bulge arranged in the middle of the limiting plate body.
Preferably, the blocking member is detachably connected to the plug member.
Preferably, the plug connector is provided with the joint respectively along its length direction's both ends on, block and be provided with on the piece and be used for constituting joint complex bayonet socket with the joint, the plug connector with block and constitute the buckle with the cooperation of bayonet socket through the joint and be connected.
Preferably, the dimension of the plug-in connector along the length direction thereof is set into an adjustable structure.
Preferably, the plug connector is made of a material capable of generating elastic deformation, the plug connector is alternately provided with an A fracture and a B fracture along the length direction of the limiting plate body, the A fracture extends to one edge of the plug connector along the width direction of the limiting plate body, the B fracture extends to the other edge of the plug connector along the width direction of the limiting plate body, and the tensile strength of the A fracture and the B fracture is lower than that of the rest parts on the plug connector; the length of the plug is adjusted by stretching both ends of the plug so that the a fracture and the B fracture are broken.
The blocking component is made of flexible materials, and the flexible materials comprise any one or any combination of polyethylene, nylon, rubber and sponge.
A wet stator submersible motor applying the stator slot wedge comprises a casing and a rotor core which is matched in the casing in a rotating mode through a rotating shaft, wherein rotor end rings are assembled at two axial ends of the rotor core, an annular stator core is sleeved on the periphery of the rotor core, the stator core and the rotor core are arranged concentrically, the outer edge of the stator core is fixedly connected with the casing, stator slots for penetrating stator coils are arranged on the inner annular wall of the stator core at intervals along the circumferential direction, the slot length direction of the stator slots is consistent with the axial direction of the stator core, two end portions of the stator coil along the axial direction of the stator core extend out of the stator slots, the notches of the stator slots face the rotor core, plug connectors are arranged in the stator slots and are matched with the notches in an embedded mode, and the length of the plug connectors is matched with the length of the stator core; the outer end of the blocking member extends to the outer side of the rotor end ring along the axial direction of the stator core, and the blocking member is arranged on the inner side of the stator coil along the radial direction.
The invention has the technical effects that:
(1) the stator slot wedge provided by the invention is used for being inserted into a slot formed between adjacent separating fingers on a stator core by arranging the plug connector, and the blocking piece connected with the plug connector can prevent water flow at a rotor end ring from impacting a stator coil due to centrifugal force after the plug connector is assembled with the slot. By using formulas
To calculate the factThe length of the blocking piece is needed, so that the length of the blocking piece can be calculated in advance according to the rotating speed of the motor and the thickness of the rotor end ring, and the length of the blocking piece can meet the requirement of blocking water flow in centrifugal motion at the rotor end ring from impacting the stator coil. By adopting the scheme, the water flow at the end ring of the rotor can be prevented from eroding the insulation of the stator coil, the service life of the stator coil is prolonged, and the reliable operation of the winding is ensured.
(2) The detachable assembly of the component on the stator core is achieved by inserting the plug connector into the notch in the stator slot, so that the installation of the component and the stator core can be conveniently blocked.
(3) The plug connector is formed by connecting an embedding part and a limiting part, the embedding part is clamped with the notch, and the limiting part limits the clamping depth of the embedding part in the notch so as to determine that the embedding part is clamped in place in the notch. Through the scheme, the accurate positioning and reliable clamping of the socket connectors and the notches on the stator core can be realized.
(4) Spacing portion is constituted through adopting spacing plate body, and the arch that sets up through spacing plate body middle part is as the embedding portion for the notch assembly of embedding portion and stator core is more convenient.
(5) The blocking piece and the plug connector adopt a detachable connection mode, and compared with an integrated structure, the detachable structure can be more convenient for assembling, disassembling and replacing the stator slot wedge on the stator, the disassembling and assembling operation is more flexible, and the required operation space is smaller.
(6) The clamping connectors are arranged at the two ends of the plug connector respectively, the blocking piece is provided with the bayonet for realizing the clamping matching with the clamping connectors, and the plug connector and the blocking piece are more convenient to assemble by adopting the connecting mode, so that the assembly and disassembly efficiency can be improved.
(7) The size-adjustable structure is set along the length direction of the plug connector, so that the requirements of stators with different axial lengths on assembling the stator slot wedge can be met.
(8) The plug connector is made of an elastic deformation material, the A fracture and the B fracture are alternately arranged on the plug connector along the length direction of the limiting plate body, and the tensile strength of the A fracture and the B fracture is lower than that of the rest parts on the plug connector, so that the A fracture and the B fracture are fractured by stretching two ends of the plug connector, and the purpose of adjusting the length of the plug connector is achieved.
(9) The blocking assembly is made of the flexible material, so that the blocking assembly can adapt to the structure in the stator slot after being assembled on the stator core and can be attached to the surface of the stator core in a more proper posture, and the stator coil and other structures can be avoided; moreover, the blocking assembly is flexible, and the blocking assembly is in flexible contact with the stator coil, so that the stator winding is reinforced in the stator core, and meanwhile, the vibration and the shaking of the stator winding in the using process are buffered, and the abrasion to the stator coil is reduced.
(10) The wet stator submersible motor provided by the invention is applied with the stator slot wedge and assembled at the notch of the stator slot, the stator slot wedge is positioned in the slot of the stator slot, and the plug connector of the stator slot wedge is embedded and matched with the notch of the stator slot, so that the assembly connection of the stator slot wedge and a stator core is realized, and the reinforcement of a stator winding in the stator slot is realized, so as to prevent the winding from loosening and scattering; the outer end of the blocking piece extends to the outer side of the rotor end ring along the axial direction of the stator core, the blocking piece is arranged on the inner side of the stator coil along the radial direction, and the blocking piece can effectively prevent water flow at the position of the rotor end ring from being eroded to the insulation of the stator coil due to the centrifugal force when the rotor core rotates, so that the service life of a stator winding is prolonged, and the stable and reliable operation of a unit is guaranteed.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a cross-sectional view of a prior art wet stator submersible motor; wherein the section plane of the view coincides with the rotor axis;
FIG. 2 is a cross-sectional view of a wet stator submersible motor provided in accordance with an embodiment of the present invention; wherein the section plane of the view coincides with the rotor axis;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is an enlarged partial view at C of FIG. 3;
fig. 6 is a partial schematic view of a stator core end provided in accordance with one embodiment of the present invention; the stator winding and stator slot wedges are not assembled in this figure;
fig. 7 is a partial schematic view of an end portion of a stator core provided in accordance with yet another embodiment of the present invention; the figure has been in terms of stator windings and stator slot wedges;
FIG. 8 is a view in the direction D of FIG. 7;
FIG. 9 is a front view of a stator slot wedge provided in accordance with one embodiment of the present invention;
FIG. 10 is a cross-sectional view taken along line E-E of FIG. 9;
FIG. 11 is a front view of a size adjustable stator slot wedge insert prior to size adjustment according to one embodiment of the present invention;
FIG. 12 is a bottom view of FIG. 11;
FIG. 13 is a front view of an adjustable size stator slot wedge insert according to another embodiment of the present invention after adjustment;
FIG. 14 is a front view of a stop in a removable stator slot wedge provided in accordance with one embodiment of the present invention;
FIG. 15 is a top view of FIG. 14;
fig. 16 is a top view of a stop in a removable stator slot wedge according to another embodiment of the present invention.
The corresponding relation of the reference numbers of the figures is the front view of the blocking piece in the stator slot wedge with the adjustable size as follows:
10-blocking component, 11-plug connector, 111-limiting plate body, 1111-arc surface, 1112-clamping connector, 112-protrusion, 113-A fracture, 114-B fracture, 12-blocking component, 121-clamping opening, 122-movable block, 1221-movable clamping opening and 123-unlocking opening;
20-a machine shell, 30-a rotating shaft, 40-a rotor core, 41-a rotor end ring, 42-a rotor punching sheet, 50-a stator core, 51-a stator slot, 52-a stator punching sheet, 511-a notch and 60-a stator coil.
Detailed Description
In order that the objects and advantages of the present application will become more apparent, the present application will be described in detail with reference to the following examples. It is understood that the following text is intended only to describe one or several particular embodiments of the application and does not strictly limit the scope of the claims which are specifically claimed herein, and that the examples and features of the examples in this application may be combined with one another without conflict.
Referring to fig. 1, in the conventional wet stator submersible motor, the rotor end rings 41 are welded to both ends of the cylinder of the rotor core 40, and are sleeved in the stator cavity and located in the annular cavity formed by the stator coil 60 extending out of the stator core 50. When the motor rotates, the water in the cavity is driven to rotate by the rotation of the rotor, and the water flow can be acted by centrifugal force in the rotating process. And because the rotor end ring 41 is fixedly connected with the rotor core 40, the rotor end ring 41 is driven to rotate when the rotor core 40 rotates, so that water flow of the rotor end ring 41 impacts a part of the stator coil 60 extending out of the stator core 50 under the action of centrifugal force, and insulation of the stator coil 60 is easily damaged, thereby causing unit failure.
Referring to fig. 1 to 16, in order to solve the technical defects of the prior art, the present embodiment provides a wet stator submersible motor, which includes a casing 20, a rotating shaft 30, a rotor core 40, a stator core 50, and a blocking assembly 10, wherein the rotating shaft 30, the rotor core 40, the stator core 50, and the blocking assembly 10 are all installed in the casing 20. The shaft 30 is rotatably fitted in the housing 20.
The rotor core 40 is mounted on the rotating shaft 30 and is coaxial with the rotating shaft, the rotor end rings 41 are mounted at two axial ends of the rotor core 40, the outer diameter of each rotor end ring 41 is consistent with that of the rotor core 40, and the thickness direction of each rotor end ring 41 is consistent with that of the rotor core 40 in the axial direction. The rotor core 40 is formed by stacking and assembling the rotor sheets 42 along the thickness direction of the rotor sheets 42.
The stator core 50 is of an annular structure and comprises a plurality of stator laminations 52, each stator lamination 52 is stacked and assembled along the thickness direction of the stator lamination 52, each notch arranged in an array along the circumferential direction is formed in the inner ring of each stator lamination 52 and used for forming a stator slot 51 after each stator lamination 52 is stacked and assembled to form the stator core 50, the notch 511 of the stator slot 51 is positioned on the inner ring wall of the stator core 50, and the width of the notch 511 is smaller than the width of the inside of the stator slot 51; in other words, the inner ring of each stator lamination 52 is provided with the separating fingers in an array along the circumferential direction, and the above-mentioned gap is formed between the adjacent separating fingers. The stator core 50 is sleeved on the periphery of the rotor core 40, the stator core 50 and the rotor core 40 are concentrically arranged, the stator core 50 is fixedly connected with the casing 20, stator slots 51 are circumferentially arrayed on the inner annular wall of the stator core 50, the stator slots 51 are used for penetrating stator coils 60, the slot length direction of the stator slots 51 is consistent with the axial direction of the stator core 50, the slot depth direction of the stator slots 51 is consistent with the radial direction of the stator core 50, part of the stator coils 60 extends out of the stator slots 51 along the axial direction of the stator core 50, the notch 511 of the stator slots 51 faces the rotor core 40, the blocking component 10 is installed in the stator slots 51, the plug connectors 11 in the blocking component 10 are in plug fit with the notch 511, and the length of the plug connectors 11 is matched with the length of the stator core 50; the outer end of the blocking member 12 extends to the outer side of the rotor end ring 41 along the axial direction of the stator core 50, and the blocking member 12 is arranged on the inner side of the stator coil 60 along the radial direction, so that when the rotor end ring 41 rotates along with the rotating shaft 30, the blocking member 12 can block and isolate water flow from the rotor end ring 41 to the stator coil 60 due to centrifugal force, and further, the purpose of preventing the water flow from eroding the insulating layer of the stator coil 60 is achieved, the service life of the stator coil 60 is finally prolonged, and the motor unit can be ensured to operate reliably and stably.
The central angle corresponding to the blocking member 12 is larger than the central angle corresponding to the stator coil 60 protruding out of the stator slot 51. In other words, the arrangement range of the blocking member 12 in the circumferential direction is larger than the distribution range of the stator coil 60 extending out of the stator slot 51 in the circumferential direction of the stator core 50, and it is ensured that the blocking member 12 can cover the stator coil 60 in the circumferential direction of the stator core 50, and the stator coil 60 is prevented from being impacted by the water flow.
The present embodiment also provides a stator slot wedge, which can be applied to the above-mentioned wet stator submersible motor, the stator slot wedge includes a blocking assembly 10 assembled in the stator slot 51, a portion of the blocking assembly 10 extending out of both axial ends of the stator core 50 constitutes a blocking member 12, and the blocking member 12 is in a cornice shape. In practical use, once the wet stator submersible motor is operated, the water flow at the inner rotor end ring 41 of the wet stator submersible motor is affected by the centrifugal force to the stator coil 60 extending out of the stator core 50 to at least twice the thickness of the rotor end ring 41 in the axial direction of the stator core 50, and therefore, the length of the blocking member 12 at one end of the stator core 40 in the axial direction of the stator core 50 is preferably greater than or equal to 2 times the thickness of the single rotor end ring 41, and the thickness direction of the rotor end ring 41 coincides with the axial direction of the stator core 50, wherein the rotor end rings 41 are assembled at both axial ends of the rotor core 40. In which a single rotor end ring 41, i.e., the rotor end ring 41 located at one axial end of the rotor core 40.
In practical implementation, once the wet stator submersible motor is operated, the water flow at the inner rotor end ring 41 of the wet stator submersible motor is influenced by centrifugal force to the stator coil 60 extending out of the stator core 50, and is at least twice as thick as the rotor end ring 41 in the axial direction of the stator core 50. As will be understood by those skilled in the art, once the rotation speed of the motor is increased, the centrifugal force applied to the water flow at the rotor end ring 41 is larger, and thus the range of the part of the stator coil 60 extending out of the stator core 50 receiving the water flow impact at the rotor end ring 41 is larger, in order to design the blocking member 12 with a suitable size according to the working condition environment of the motor, the further preferred embodiment of the present embodiment is: the thickness of the rotor end ring 41 at one axial end of the rotor core 40 is denoted by LdThe number of revolutions of the motor is denoted by n, and the length of the stopper 12 located at one axial end of the stator core 50 is denoted by LzThen, then
Further explanation about this formula: because both ends of the rotor core 40 are provided with the rotor end plate and the rotor end ring 41, both ends of the rotor core 40 in the axial direction extend out of both ends of the stator core 50 in the axial direction, and the portion of the rotor core 40 extending out of the stator core 50 is mainly the rotor end ring 41. To effectively protect the stator windings extending out of the notch 511 portion of the stator core 50 from the centrifugal force generated by the water at the extended end of the rotor core 40 (i.e., the rotor end ring 41), the length of the blocking member 12 of the stator slot wedge extending out of the stator core 50 is first increased to 2 times the length of the rotor end ring 41. Meanwhile, as the motor speed is faster, the linear speed of the impact water generated at the rotor end ring 41 is higher, so that further enhancement and optimization in the axial length of the barrier 12 are required, thereby increasing the consideration of the influence of the motor speed on the length of the barrier 12 in the formula. Namely, the impact energy of the water flow generated by the rotor core 40 is weakened by lengthening the protruding length of the stator slot wedge.
With regard to the application of the above formula, the following is exemplified:
taking a 2-pole motor as an example, if the synchronous speed of the 2-pole motor is 3000r/min, then L is the thickness of the rotor end ring 41 is 20mmZ＝2*20+3000/200＝55mm；
Taking a 4-pole motor as an example, if the synchronous speed of the 4-pole motor is 1500r/min, L is equal to 20mm of the thickness of the rotor end ring 41Z＝2*20+1500/200＝47.5mm。
By adopting the above calculation formula, the designer can calculate the maximum length of the blocking member 12 in the application environment in advance according to the application environment of the motor, and further can improve the efficiency of structural design and shorten the manufacturing period of the stator slot wedge.
The blocking member 10 has a plug 11 for forming a plug-fit with the notch 511 of the stator slot 51, and the blocking members 12 are provided at both ends of the plug 11 in the longitudinal direction, the longitudinal direction of the plug 11 being in accordance with the axial direction of the stator core 50. The detachable assembly of the blocking component 10 on the stator core 50 is realized by inserting the inserting piece 11 and the notch 511 on the stator slot 51, so that the installation of the blocking component 10 and the stator core 50 can be conveniently realized.
The plug-in unit 11 is formed by connecting an insertion portion for being inserted into the notch 511 and a stopper portion for restricting the insertion of the insertion portion into the notch 511. The plug connector 11 is formed by connecting an embedding part and a limiting part, the embedding part is clamped with the notch 511, and the limiting part limits the clamping depth of the embedding part in the notch 511 so as to determine that the embedding part is clamped in place in the notch 511. Through the scheme, the plug connector 11 can be accurately positioned and reliably clamped with the notch 511 on the stator core 50. The stopper portion is located in the stator slot 51, and forms a restraining hole to be inserted into the stator coil 60 by surrounding the inner wall of the stator slot 51, and restrains and fixes the stator coil 60 to prevent the stator coil 60 inserted into the stator core 50 from being loosened and scattered.
The limiting part is formed by a limiting plate body 111, and the embedding part is formed by a bulge 112 arranged in the middle of the limiting plate body 111. The limiting part is formed by adopting the limiting plate body 111, and the bulge 112 arranged in the middle of the limiting plate body 111 is used as an embedding part, so that the embedding part is more convenient to assemble with the notch 511 of the stator core 50. Specifically, the protrusion 112 may be a protruding strip, the protruding strip is inserted into the notch 511, a length direction of the protruding strip is consistent with a length direction of the limiting plate 111, and a length of the limiting plate 111 is matched with a length of the stator core 50.
One surface of the limiting plate body 111, which is far away from the protrusion 112, is an arc-shaped surface 1111, and an arc opening of the arc-shaped surface 1111 is far away from the embedded plate body; the blocking part 12 is formed by a blocking block; one surface of the limiting plate body 111 departing from the protrusion 112 and one surface of the stop block departing from the protrusion 112 are arranged in a straight-line manner. Set up the one side that deviates from protruding 112 on the spacing plate body 111 into the arcwall face, the nock deviates from protruding 112 and arranges, and the arcwall face on the spacing plate body 111 is in the same direction as extending to on blocking the piece for when stator slot wedge was as a whole, stator slot wedge deviates from protruding 112 one side and is the arcwall face of indent, can draw in and fix the stator winding of installing in stator slot wedge like this, prevents that the winding is loose.
The arcuate surface 1111 may be replaced by a V-shaped surface, and the corners of the V-shaped surface are smoothly transitioned.
The above-described process of mounting the barrier assembly 10 to the stator core 50 is: the barrier assembly 10 is first inserted into the stator slot 51 with both ends exposed to the outside of both axial ends of the stator core 50, and then the side having the protrusion 112 is directed toward the notch 511 and is snapped in. The stator coil 60 may then be inserted into the hole defined by the limiting plate 111 and the wall of the stator slot 51.
The blocking assembly 10 is preferably made of a composite material having a certain softness so that the blocking assembly 10 can better abut against the inner wall of the stator slot 51 after installation, and in addition, helps protect the stator coil 60 from abrasion of the stator coil 60. Moreover, since the blocking assembly 10 is flexible, it also dampens the impact of water flow during water flow impact. Wherein, the composite material includes any one or any combination of polyethylene, nylon, rubber and sponge.
The barrier assembly 10 may be a unitary structure or may be split. The advantage of adopting the integral type structure is that overall structure is more firm. And a split structure is adopted, so that the assembly, disassembly and maintenance can be facilitated.
In the actual use of the blocking assembly 10, if the blocking assembly 10 needs to be replaced and maintained, the stator coil 60 is already assembled in the stator slot 51, and in the case that the blocking assembly 10 is of a one-piece structure, if the blocking assembly 10 is to be disassembled, a space capable of allowing the blocking assembly 10 to move in the radial direction is required in the stator slot 51, and the size of the space moving in the radial direction is matched with the size of the protrusion 112 in the radial direction of the stator core 50, so that the blocking assembly 10 can be conveniently disassembled, however, once the condition is met, the stator coil in the stator slot 51 is not reliably fixed in the state that the blocking assembly 10 is installed in place, so that loosening and scattering are easy to occur, and the normal operation of the motor is adversely affected. For this, the present embodiment is preferred to detachably connect the blocking member 12 to the plug 11. The advantage of the detachability is that on the one hand, assembly is facilitated, and the blocking member 10 can be assembled in the stator slot 51 before the stator coil 60 is assembled, or the blocking member 10 can be assembled after the stator coil 60 is assembled, because the minimum operation space required for the blocking member 10 to be assembled in the stator slot 51 is adapted to the thickness of the limiting plate 111; on the other hand, the blocking piece 12 and the plug connector 11 can be independently replaced, the replacement is convenient, and the maintenance cost is reduced. The blocking part 12 and the plug-in part 11 are detachably connected, compared with an integrated structure, the detachable structure can more conveniently block the assembly, disassembly and replacement of the assembly 10 on the stator, the disassembly and assembly operations are more flexible, and the required operation space is smaller.
Referring to fig. 10, the thickness of the protrusion 112 is denoted by "a" and the thickness of the limiting plate 111 is denoted by "b". When the blocking assembly 10 is of an integral structure, if the blocking assembly 10 is to be detached from the stator core 50 with the stator coil 60 installed thereon, the blocking assembly 10 needs to be moved by a distance a radially outward along the stator core 50 to pull the protrusion 112 out of the notch 511, and then the blocking assembly 10 is moved out of the stator slot 51 by translating the blocking assembly 10 axially along the stator core 50, which requires that a margin for the blocking assembly 10 to move radially is reserved in the stator slot 51, and the stator coil 60 in the stator slot 51 is loosened during normal use. When the blocking assembly 10 of the above-mentioned detachable structure is adopted, the blocking assembly 10 can be moved out of the stator slot 51 by detaching one of the blocking members 12 and then pulling the blocking assembly 10 along the axial direction of the stator core 50 by holding the other blocking member 12. In fact, after the blocking assembly 10 is mounted on the stator core 50, the amount of space required by the blocking assembly 10 in the stator slot 51 is only required to be matched with the limiting plate 111. It can be seen that when the blocking assembly 10 of a detachable structure is adopted, the assembly and disassembly thereof can not occupy the redundant space in the stator slot 51, and the stator coil 60 can be reliably restrained and fixed in the stator slot 51 after the blocking assembly 10 is assembled in place, thereby preventing the stator coil 60 from loosening.
Referring to fig. 11 to 13, the connector 11 is provided with the latch 1112 at two ends along the length direction thereof, the blocking member 12 is provided with a bayonet 121 for forming a snap fit with the latch 1112, and the connector 11 and the blocking member 12 form a snap fit connection by matching the latch 1112 with the bayonet 121, so that the detachable connection between the blocking member 12 and the connector 11 is more convenient and flexible. Of course, the specific implementation forms of the snap-fit connection may be evolved accordingly, and the embodiment does not exhaust the snap-fit connection, and any specific implementation form capable of realizing the snap-fit connection in the prior art may be used in this embodiment.
Referring to fig. 11 and 13, the plug connector 11 has a T-shaped cross section, the T-shaped structure is composed of the above-mentioned limiting plate 111 arranged horizontally and the protrusion 112 arranged vertically, wherein the limiting plate 111 is a strip-shaped plate, two ends of the limiting plate 111 in the length direction respectively extend outwards to form pi-shaped ears, the pi-shaped ears form the clip head 1112, the pi-shaped ears are equivalent to two L-shaped pieces arranged oppositely back to back (refer to the lower end structure of the plug connector 11 in fig. 11 and 13), and the two L-shaped pieces are arranged separately. The two L-shaped pieces are provided with a snap-in projection at one end far away from the limiting plate 111 and at one side far away from each other.
The bayonet 121 of the blocking member 12 is disposed through the body of the blocking member 12 in the direction in which the bayonet 1112 moves in. The blocking member 12 is provided with an unlocking hole 123 towards the middle of one surface of the stator coil 60 in use, the unlocking hole 123 is communicated with the bayonet, and the dimension of the unlocking hole 123 along the width direction of the limiting plate 111 is larger than the width of the bayonet 121. By implementing the blocking member 12 according to the scheme, any one of two ends of the blocking member 12 can be assembled towards the limiting plate body 111, so that the assembly of the blocking member 111 is improved, and the assembly is more flexible and convenient.
When the anti-theft device is used, the pi-shaped ears at the two ends of the plug connector 11 are extruded towards the middle to deform, then extend into the bayonet 121 arranged on the blocking piece 12, and after the pi-shaped ears are clamped in place and loosened, the pi-shaped ears recover to the original shape and are clamped in the unlocking port 123 arranged on the blocking piece 12, so that the blocking assembly 10 is assembled. When the plug connector 11 and the blocking member 12 need to be detached, the pi-shaped ears can be pressed and deformed towards the middle in the unlocking opening 123 by means of a tool, and the plug connector 11 and the blocking member 12 can be moved towards opposite directions, namely, the plug connector 11 and the blocking member 12 can be detached.
In order to conveniently clamp the clamping head 1112 in the bayonet 121, the clamping protrusions at the outer end of the pi-shaped ear can be processed into barb shapes, the tip ends of the barb points deviate from the limiting plate body 111, the minimum distance between the two clamping protrusions deviating from each other is smaller than the width of the bayonet 121, so that the outer end of the clamping head 1112 can be conveniently inserted into the bayonet 121, the pi-shaped ear can be extruded and deformed towards the middle along with the clamping head 1112 moving into the bayonet 121, and after the clamping head is clamped in place and loosened, the pi-shaped ear can restore to the original shape.
Referring to fig. 16, in order to facilitate the detachment of the blocking member 12, a partial body of the blocking member 12 between the unlocking port 123 and one end of the bayonet 121 is set as the movable block 122, the movable block 122 is slidably assembled on the blocking member 12 along the depth direction of the bayonet 121 through a guide rod and a compression spring, the movable block 122 is provided with a movable bayonet 1221, and the movable bayonet 1221 and the bayonet 121 are arranged in a straight line and have the same size. The compression spring is used to urge the movable block 122 to move outward of the blocking member 12, thereby forming an unlocking port 123 in the middle of the blocking member 12. The guide rod is in sliding fit with the movable block 122, the length direction of the guide rod is consistent with the depth direction of the hole of the bayonet 121, the outer end of the guide rod is provided with a limiting structure to prevent the movable block 122 from slipping off the guide rod, and the compression spring is preferably in a compression state in an initial state, so that the movable block 122 is enabled to move with certain damping feeling.
When the scheme is adopted, the process of disassembling the blocking piece 12 is as follows: the movable block 122 is pushed to move towards the middle of the blocking piece 12, so that the two side walls in the width direction in the movable bayonet 1221 gradually abut against the two sides of the pi-shaped ear to be extruded and deformed towards the middle, and when the two sides of the pi-shaped ear are deformed towards the middle to be allowed to pass through the bayonet 121, the plug connector 11 and the blocking piece 12 are moved towards opposite directions at the same time, and then the plug connector and the blocking piece can be separated. Because other tools are not needed in the process, the blocking piece 12 and the plug connector 11 are more convenient and labor-saving to disassemble.
Because the axial lengths of the stator cores 50 of different series are different, in order to make the length of the plug 11 adaptively adjustable according to the different axial lengths of the stator cores 50, the preferred embodiment of the present embodiment is as follows: the dimension of the plug-in unit 11 along the length direction thereof is set to be an adjustable structure.
Specifically, referring to fig. 11 and 13, the plug 11 is made of a material capable of generating elastic deformation, the a fracture 113 and the B fracture 114 are alternately arranged on the plug 11 along the length direction of the limiting plate 111, the a fracture 113 extends to one edge of the plug 11 along the width direction of the limiting plate 111, the B fracture 114 extends to the other edge of the plug 11 along the width direction of the limiting plate 111, and the tensile strength of the a fracture 113 and the B fracture 114 is lower than that of the rest parts on the plug 11; the a fracture 113 and the B fracture 114 are fractured by stretching both ends of the plug 11 to adjust the length of the plug 11.
The fracture A113 and the fracture B114 may be fractures which are already broken in advance, and the fracture is restored to the minimum in the initial state because the plug-in unit 11 is made of an elastic deformation material, and the minimum fracture is about 0.1-1 mm, and more preferably 0.4 mm. Of course, the joints may be disposed at intervals along the length direction of the crack at the crack of the fracture mark a 113 and the fracture mark B114, so that the crack is in a state of being disconnected and not disconnected, and the tensile strength of the joints is only required to be less than that of the rest of the plug-in unit 11.
In the using process, the two methods are basically the same, namely, the two ends of the plug connector 11 are stretched, so that the length of the plug connector 11 is stretched to be matched with the axial length of the stator core 50 to be assembled and assembled on the stator core 50, and then the blocking piece 12 is assembled at the end part.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (10)
1. A stator slot wedge, comprising a blocking member (10) fitted in a stator slot (51), the blocking member (10) having a cornice-like shape formed by portions extending beyond both axial ends of a stator core (50), to be located in the stator core (50)The length of the end barrier piece (12) along the axial direction of the stator core (50) is marked as LzThe thickness of a rotor end ring (41) at one end of a rotor core (40) is expressed as LdWhen the rotation speed of the motor is n, the
Wherein the thickness direction of the rotor end ring (41) is coincident with the axial direction of the stator core (50).
2. A stator slot wedge according to claim 1, characterised in that the blocking component (10) has a plug part (11) for forming a plug fit with the slot opening (511) of the stator slot (51).
3. A stator slot wedge according to claim 2, characterised in that the plug (11) is formed by a connection of an insertion part for snapping into the slot opening (511) and a limit part for limiting the insertion position of the insertion part in the slot opening (511).
4. A stator slot wedge according to claim 3, wherein the limiting portion is formed of a limiting plate body (111), and the insertion portion is formed of a protrusion (112) provided at a central portion of the limiting plate body (111).
5. A stator slot wedge according to claim 4, characterised in that the blocking element (12) is detachably connected to the plug element (11).
6. A stator slot wedge according to claim 5, characterized in that, the plug connector (11) is provided with a bayonet joint (1112) at both ends along the length direction, the blocking piece (12) is provided with a bayonet (121) for forming a bayonet fitting with the bayonet joint (1112), and the plug connector (11) and the blocking piece (12) form a bayonet connection through the cooperation of the bayonet joint (1112) and the bayonet (121).
7. A stator slot wedge according to claim 1, characterised in that the dimension of the plug (11) in its length direction is arranged in an adjustable configuration.
8. The stator slot wedge of claim 7, wherein the plug (11) is made of a material capable of generating elastic deformation, the plug (11) is alternately provided with a fracture (113) A and a fracture (114) B along the length direction of the limiting plate body (111), the fracture (113) A extends to one edge of the plug (11) along the width direction of the limiting plate body (111), the fracture (114) B extends to the other edge of the plug (11) along the width direction of the limiting plate body (111), and the tensile strength of the fracture (113) A and the fracture (114) B is lower than that of the rest parts on the plug (11); the A-fracture (113) and the B-fracture (114) are fractured by stretching both ends of the plug (11) to adjust the length of the plug (11).
9. A stator slot wedge according to claim 1, characterized in that the blocking member (10) is made of a flexible material comprising any one or any combination of polyethylene, nylon, rubber, sponge.
10. A wet stator submersible motor using the stator slot wedge of any one of claims 1 to 9, comprising a housing (20) and a rotor core (40) rotatably fitted in the housing (20) through a rotating shaft (30), wherein the rotor core (40) is provided with rotor end rings (41) at both axial ends, the rotor core (40) is sleeved with an annular stator core (50), the stator core (50) and the rotor core (40) are concentrically arranged, the outer edge of the stator core (50) is fixedly connected with the housing (20), stator slots (51) for passing stator coils (60) are arranged on the inner annular wall of the stator core (50) at intervals along the circumferential direction, the slot length direction of the stator slots (51) is consistent with the axial direction of the stator core (50), and the stator slots (51) extend out of both axial ends of the stator core (60) along the axial direction of the stator core (50), the notch (511) of the stator slot (51) faces the rotor core (40), the plug connector (11) is arranged in the stator slot (51) and is matched with the notch (511) in an embedding manner, and the length of the plug connector (11) is matched with that of the stator core (50); the outer end of the blocking member (12) extends to the outside of the rotor end ring (41) in the axial direction of the stator core (50), and the blocking member (12) is arranged inside the stator coil (60) in the radial direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111059508.5A CN113726061B (en) | 2021-09-10 | 2021-09-10 | Stator slot wedge and wet stator submersible motor using same |
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|---|---|---|---|
| CN202111059508.5A CN113726061B (en) | 2021-09-10 | 2021-09-10 | Stator slot wedge and wet stator submersible motor using same |
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| CN113726061A true CN113726061A (en) | 2021-11-30 |
| CN113726061B CN113726061B (en) | 2022-03-18 |
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| CN114157070A (en) * | 2021-12-02 | 2022-03-08 | 杭州新恒力电机制造有限公司 | Stator structure of alternating current motor |
| FR3138586A1 (en) * | 2022-07-28 | 2024-02-02 | Valeo Equipements Electriques Moteur | Stator for a rotating electric machine |
| CN118100574A (en) * | 2024-04-18 | 2024-05-28 | 江苏海拓宾未来工业科技集团有限公司 | Permanent magnet high-speed motor system of oil-free high-speed compressor and production process thereof |
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| FR3138586A1 (en) * | 2022-07-28 | 2024-02-02 | Valeo Equipements Electriques Moteur | Stator for a rotating electric machine |
| CN118100574A (en) * | 2024-04-18 | 2024-05-28 | 江苏海拓宾未来工业科技集团有限公司 | Permanent magnet high-speed motor system of oil-free high-speed compressor and production process thereof |
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| CN113726061B (en) | 2022-03-18 |
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