CN112234786A

CN112234786A - Rotor utilizing skin effect

Info

Publication number: CN112234786A
Application number: CN202011076070.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Changsha Kaihu Equipment Co ltd
Current assignee: Changsha Kaihu Equipment Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-15

Abstract

The invention discloses a rotor utilizing skin effect, which comprises hollow conducting bars and end rings, wherein the centers of circles of adjacent end rings are equidistantly provided with the hollow conducting bars, slots are equidistantly arranged on the surface of the end ring, a flexible connecting frame is arranged at the bottom of the hollow conducting bar corresponding to the slots, and the outer surface of the hollow guide bar corresponding to the middle hole is fixed with an elastic angle head, one end of a movable lug boss is inserted in the flexible connecting frame in a sliding way, and the bottom of the movable lug boss is inserted with the slot of the end ring in a sliding way, and the other end of the movable lug boss passes through the elastic angle head to be inserted with the hollow conducting bar in a sliding way, compared with the prior art, the rotor utilizing the skin effect, when the current passing surface is ensured as far as possible, the gravity center of the conducting strip is hollowed out, so that the weight is reduced, the inertia is reduced, the connection stability of the radiating surface and the joint is improved, the internal stress and the external inertia force are reduced, and the service life of the connection point is prolonged.

Description

Rotor utilizing skin effect

Technical Field

The invention relates to the technical field of rotors, in particular to a rotor utilizing a skin effect.

Background

A squirrel cage motor is one of three-phase asynchronous motors, and a squirrel cage rotor is a rotating part of the squirrel cage motor. Generally, a rotor coil made of copper or aluminum is cast in a cage-shaped groove on a rotor core, and the coil is a closed loop which is not connected with other parts and mainly used for inhibiting stator current. Simple structure and wide application.

The squirrel-cage rotor generates induction current in a rotating magnetic field, but the induction current is unevenly distributed on the cross section of the conducting bar due to the skin effect, the current density on the surface of the conducting bar is higher than the central density, and the current is concentrated on the surface of the conductor to flow. In addition, the guide bars and the end rings on the market are welded, so that the influence of centrifugal inertia force, thermal expansion and cold contraction is inevitable, and therefore, a rotor utilizing the skin effect is provided.

Disclosure of Invention

The present invention is directed to a rotor utilizing skin effect, which reduces internal stress and external inertia force and improves the life of a connection point, so as to solve the problems of the background art mentioned above.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an utilize rotor of skin effect, includes cavity conducting bar and end links, and is adjacent centre of a circle equidistance is equipped with the cavity conducting bar between the end links, the slot has been seted up to the end links equidistance on the surface, the position that cavity conducting bar bottom corresponds the slot is equipped with flexible connection frame, and the surface mounting elasticity angle head that the cavity conducting bar corresponds well hole department, the inside slip of flexible connection frame is pegged graft and is had the one end of removing the boss, and removes the slot slip grafting of boss bottom and end links, and the other end that removes the boss passes elasticity angle head and the slip grafting of cavity conducting bar, the end links lie in the slot both sides on the surface and be fixed with the piece that.

Preferably, the top surface of the flexible connecting frame is embedded and connected with an adjusting washer, the adjusting washer is in sliding insertion connection with the movable boss, one ends of springs are symmetrically fixed at the bottom of the flexible connecting frame, and the other ends of the springs are fixedly connected with the surface of the outer ring of the end ring.

Preferably, a fixing frame is fixedly inserted into one end, inserted into the end ring slot, of the movable boss, inclined deformation rods are symmetrically arranged at two ends of the fixing frame, and the tops of the deformation rods are in extrusion contact with the inner wall of the end ring.

Preferably, the deformation rod is matched with the fixing frame through a rectangular hole groove.

Preferably, an elastic ring is arranged at the joint of the movable boss and the elastic angle head, and the elastic ring is in extrusion contact with the movable boss and the elastic angle head; the bending part of the elastic angle head can be elastically deformed.

Preferably, a through hole is formed in the movable boss and communicated with a middle hole in the hollow guide bar.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, as the rotating speed of the rotor increases, the centrifugal force increases, the hollow guide strip drives the movable lug boss to move outwards, the deformation rod on the fixing frame deforms, the larger the displacement of the hollow guide strip along with the outward deviation is, the larger the deformation force of the deformation rod is, and when the heat of the guide strip is small, the expansion displacement is small, the elastic ring deforms and neutralizes; when the heat productivity is large, and the composite deformation of the heat productivity and parts is added, the deformation of the elastic ring is insufficient, at the moment, the deformation part of the elastic angle head is bent to continuously balance the heat deformation amount, the upper end of the flexible connecting frame is embedded with the adjusting washer, the flexible connecting frame and the spring are limited by the movable boss and the end ring, the spring is always compressed, and the pressing force of the spring is adjusted by embedding the adjusting washers.

Drawings

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

FIG. 2 is a schematic view of an end ring structure of the present invention;

FIG. 3 is a schematic view of the structure of area A of the present invention;

FIG. 4 is a schematic view of the structure of the insertion point of the movable boss of the present invention.

In the figure: 1. a hollow conducting bar; 2. an end ring; 3. a wind-up sheet; 4. moving the boss; 41. a through hole; 5. an elastic angle head; 6. a flexible connecting frame; 61. a spring; 7. a fixed mount; 71. a deformation rod; 8. an adjusting washer; 9. an elastic ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a rotor using a skin effect in the drawings includes hollow guide bars 1 and end rings 2, the centers of circles between adjacent end rings 2 are equidistantly provided with the hollow guide bars 1, the surface of the end ring 2 is equidistantly provided with slots, the bottom of the hollow guide bar 1 is provided with a flexible connecting frame 6 corresponding to the slots, the outer surface of the hollow guide bar 1 corresponding to the middle hole is fixed with an elastic angle head 5, one end of a movable boss 4 is slidably inserted into the flexible connecting frame 6, the bottom of the movable boss 4 is slidably inserted into the slots of the end ring 2, the other end of the movable boss 4 passes through the elastic angle head 5 to be slidably inserted into the hollow guide bar 1, wind-up blades 3 are fixed on the surface of the end ring 2 at two sides of the slots, the hollow guide bar 1 is connected with the end ring 2 through the flexible connecting frame 6, the middle of the hollow guide bar 1 is hollowed for heat dissipation and light weight, the right end of the movable lug boss 4 is inserted into the middle hole of the hollow guide bar 1, and the lower end of the movable lug boss is inserted into the end ring 2; the elastic angle head 5 is connected with the hollow conducting bar 1 through a bolt and is sleeved on the movable boss 4, the wind-lifting piece 3 generates air flow along with the rotation of the rotor, and the air flow dissipates heat of the hollow conducting bar 1 through the movable boss 4 and the middle hole of the hollow conducting bar 1.

This flexible link 6 design's advantage is that change the rigid connection originally into flexible connection, along with radial centrifugal force's change allows the conducting bar to do little displacement, centrifugal force is not the direct action junction in addition, but turns into the deformation that has high fatigue strength's deformation pole 71, and if the junction damages also damages earlier and warp pole 71, it is convenient and with low costs to change.

Referring to fig. 3 and 4, an adjusting washer 8 is embedded and connected on the top surface of the flexible connecting frame 6, the adjusting washer 8 and the moving boss 4 are in sliding insertion, one end of a spring 61 is symmetrically fixed at the bottom of the flexible connecting frame 6, the other end of the spring 61 is fixedly connected with the outer ring surface of the end ring 2, the moving boss 4 is inserted into the groove of the end ring 2, the spring 61 is fixedly connected at the lower end of the flexible connecting frame 6, and the spring 61 abuts against the end ring 2; the upper end of the flexible connecting frame 6 is embedded with an adjusting washer 8, the flexible connecting frame 6 and the spring 61 are limited by the movable boss 4 and the end ring 2, the spring 61 is compressed all the time, and the pressing force of the spring 61 is adjusted by embedding a plurality of adjusting washers 8.

Referring to fig. 2 and 3, a fixing frame 7 is fixedly inserted into one end of the moving boss 4 inserted into the slot of the end ring 2, and two ends of the fixing frame 7 are symmetrically provided with inclined deformation rods 71, the top of each deformation rod 71 is in pressing contact with the inner wall of the end ring 2, the centrifugal force increases with the increase of the rotor rotation speed, the hollow guide bar 1 drives the moving boss 4 to move outwards, the deformation rods 71 on the fixing frame 7 deform, and the deformation force of the deformation rods 71 increases with the increase of the outward displacement.

Referring to fig. 2, the deformation rod 71 is matched with the fixing frame 7 by a rectangular hole.

Referring to fig. 4, an elastic ring 9 is disposed at a joint of the movable boss 4 and the elastic angle head 5, the elastic ring 9 is in pressing contact with the movable boss 4 and the elastic angle head 5, the elastic angle head 5 and the elastic ring 9 are arranged for transverse expansion of the guide bar and other parts when heated, and when the heat of the guide bar is small, the guide bar is deformed and neutralized by the elastic ring 9; when the heat generation is large and the composite deformation of the heat generation and the parts is added, the deformation of the elastic ring 9 is insufficient, and the deformation part of the elastic angle head 5 is bent to continuously balance the thermal deformation.

Referring to fig. 1, a through hole 41 is formed in the movable boss 4, and the through hole 41 is communicated with a central hole in the hollow conducting bar 1, so as to facilitate heat dissipation.

In the scheme, as the rotating speed of the rotor is increased, centrifugal force is increased, the hollow conducting bar 1 drives the movable lug boss 4 to move outwards, the deformation rod 71 on the fixed frame 7 deforms, the larger the displacement of the outward deviation is, the larger the deformation force of the deformation rod 71 is, and when the heat of the conducting bar expands for a small displacement, the conducting bar deforms and neutralizes through the elastic ring 9; when the heat productivity is large, and the composite deformation of the heat productivity and parts is added, the deformation of the elastic ring 9 is insufficient, at the moment, the deformation position of the elastic angle head 5 is bent to continuously balance the heat deformation, the adjusting washer 8 is embedded at the upper end of the flexible connecting frame 6, the adjusting washer 8, the flexible connecting frame 6 and the spring 61 are limited by the movable boss 4 and the end ring 2, the spring 61 is always compressed, and the pressing force of the spring 61 is adjusted by embedding the adjusting washers 8.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A rotor using skin effect, comprising hollow conducting bars (1) and end rings (2), characterized in that: it is adjacent centre of a circle equidistance is equipped with cavity gib (1) between end links (2), slot has been seted up to end links (2) equidistance on the surface, the position that corresponds the slot in cavity gib (1) bottom is equipped with flexible link (6), and the outer fixed surface that cavity gib (1) corresponds well hole department has elasticity angle head (5), the inside slip grafting of flexible link (6) has the one end of removing boss (4), and removes the slot slip grafting of boss (4) bottom and end links (2), and the other end of removing boss (4) passes elasticity angle head (5) and the slip grafting of cavity gib (1), end links (2) lie in the slot both sides on the surface and are fixed with air starting sheet (3).

2. A rotor using skin effect according to claim 1, wherein: the top surface of the flexible connecting frame (6) is embedded with an adjusting washer (8), the adjusting washer (8) is in sliding insertion connection with the movable boss (4), one end of a spring (61) is symmetrically fixed to the bottom of the flexible connecting frame (6), and the other end of the spring (61) is fixedly connected with the surface of the outer ring of the end ring (2).

3. A rotor using skin effect according to claim 1, wherein: the fixed grafting of one end that removes boss (4) and insert end ring (2) slot has mount (7), and mount (7) both ends symmetry has deformation pole (71) of putting to one side, deformation pole (71) top and end ring (2) inner wall extrusion contact.

4. A rotor using skin effect according to claim 3, wherein: the deformation rod (71) is matched with the fixed frame (7) by adopting a rectangular hole groove.

5. A rotor using skin effect according to claim 1, wherein: an elastic ring (9) is arranged at the joint of the movable boss (4) and the elastic angle head (5), and the elastic ring (9) is in extrusion contact with the movable boss (4) and the elastic angle head (5); the bending part of the elastic angle head can be elastically deformed.

6. A rotor using skin effect according to claim 1, wherein: a through hole (41) is formed in the movable boss (4), and the through hole (41) is communicated with a middle hole in the hollow guide bar (1).