Guide bar mounting structure of rotor closed slot efficient asynchronous motor

Abstract

A rotor closed slot efficient asynchronous motor conducting bar installation structure comprises a plurality of groups of rotor punching sheets and rotor ventilation slot plates which are stacked in sequence, conducting bars penetrate through the rotor punching sheets and the rotor ventilation slot plates, symmetrical wedge-caulking grooves are formed in the two ends of each conducting bar, tensioning blocks are installed in the wedge-caulking grooves in a matched mode, and the tensioning blocks make close contact with the rotor punching sheets; a pressing ring is further installed outside the rotor punching sheet and tightly presses the rotor punching sheet, a weftless tape is wound on the pressing ring, a lower end ring is installed on the guide strip outside the pressing ring, notches are evenly distributed in the outer circumferential face of the lower end ring, an upper end ring is installed on the outer circumferential face of the lower end ring in a matched mode, and the upper end ring is of an annular structure. And the inner wall surface of the upper end ring is matched with the notch to form a groove. By redesigning the structure of the conducting bar and adding the installation of the tensioning block, the tensioning block can firmly fix the conducting bar of the rotor on the rotor punching sheet, the installation reliability of the rotor is ensured, the vibration problem caused by the loosening of the conducting bar due to the gap between the conducting bar and the rotor punching sheet is effectively solved, and the working reliability of the motor is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor mounting structure technical field especially a rotor closed slot high -efficient asynchronous motor guide bar mounting structure. BACKGROUND

[0002] The high -voltage motor mandatory standard GB30254, its detailed stipulation high -voltage three -phase cage type asynchronous motor (abbreviation " motor ") energy efficiency grade, necessary technical requirement and corresponding test method, wherein the rotating electric machine efficiency requirement is more and more strict, and the user is more and more interested in using high -efficient motor.

[0003] In recent years, the efficiency of motor is continuously promoted, and adopting closed slot design scheme is an effective scheme for improving motor efficiency.For small motor, cast copper and cast aluminum design method can be used to ensure that the guide bar is full in the rotor slot without loosening, but for large motor, it is difficult to cast copper and cast aluminum, and the guide bar inside forms a thin strip and a broken strip, which is difficult to ensure product quality. For large motor, the guide bar is inserted, and the wedge is tightened at the rotor punching piece slot, to ensure that it is not loose. However, the high -efficient motor with closed slot has no slot in the rotor, and cannot be wedged. At present, there are still some defects, which cannot meet the use requirements. CONTENT OF THE UTILITY MODEL

[0004] In view of the above-mentioned defects in the prior art, the present application provides a rotor closed slot high -efficient asynchronous motor guide bar mounting structure with reasonable structure, so that the rotor guide bar is designed with a wedge port, the problem of rotor guide bar loosening in the rotor core is solved, and the use requirements are met.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A rotor closed slot high -efficient asynchronous motor guide bar mounting structure, comprising a plurality of groups of rotor punching pieces and rotor ventilation groove plates stacked in sequence, the rotor punching pieces and the rotor ventilation groove plates are simultaneously penetrated by the guide bar, the guide bar is in a long strip structure, the two ends of the guide bar are provided with symmetrical wedge grooves, and the wedge grooves are matched with the installation of the expansion block, the expansion block is in close contact with the rotor punching piece, the rotor punching piece is further provided with a pressing ring, the pressing ring is used for pressing the rotor punching piece, the pressing ring is wound with a weftless tape, and the lower end ring is installed on the outer guide bar of the pressing ring.

[0007] As a further improvement of the above technical scheme:

[0008] The end of the guide bar is welded with the upper end ring and the lower end ring.

[0009] The guide bar is inserted into the groove.

[0010] The upper end ring and the lower end ring adopt an interference fit.

[0011] The tension block is of an integral structure.

[0012] The cross section of the tension block is trapezoidal.

[0013] The wedge groove of the guide bar is provided with an inner concave arc.

[0014] The utility model has the advantages of compact and reasonable structure, convenient operation, and the like.

[0015] The utility model discloses a rotor of a motor, which comprises a rotor core, a rotor lamination, a guide bar, a tension block, a lower end ring and an upper end ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram (cross section) of the utility model.

[0017] Figure 2 It is the partial view (one) of Figure 1

[0018] Figure 3 It is the partial view (two) of Figure 1

[0019] Figure 4 It is the front view of the lower end ring of the utility model.

[0020] Figure 5 It is the side view of Figure 4

[0021] Figure 6 It is the structural schematic diagram of the tension block of the utility model.

[0022] Figure 7 It is the structural schematic diagram of the guide bar of the utility model.

[0023] Figure 8 It is the structural schematic diagram of the rotor lamination of the utility model.

[0024] Figure 9 It is the structural schematic diagram of the rotor ventilation groove plate of the utility model.

[0025] Figure 10 It is the structural schematic diagram of the pressing ring of the utility model.

[0026] Figure 11 It is the side view of Figure 10

[0027] ​​​​Figure 12 It is a structure schematic view of the upper end ring.

[0028] Wherein: 101, lower end ring; 102, without weft tape; 103, tension block; 104, guide bar; 105, rotor punching sheet; 106, rotor ventilation groove plate; 107, pressing ring; 108, upper end ring; 109, wedge groove. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model will be described below in combination with the drawings.

[0030] As Figures 1-10 shown, the rotor closed slot high-efficiency asynchronous motor guide bar mounting structure of the embodiment, including the multiple groups of rotor punching sheet 105 and rotor ventilation groove plate 106 that are stacked in sequence, the guide bar 104 is simultaneously passed in the rotor punching sheet 105 and rotor ventilation groove plate 106, the guide bar 104 is long strip structure, the both ends of guide bar 104 are provided with the wedge groove 109 that is symmetrical, and the tension block 103 is installed in the wedge groove 109 in cooperation, the tension block 103 is in close contact with the rotor punching sheet 105;The rotor punching sheet 105 is also provided with the pressing ring 107 outside, and the pressing ring 107 is tightly pressed to the rotor punching sheet 105, the no weft tape 102 is wound on the pressing ring 107, and the guide bar 104 outside the pressing ring 107 is installed with the lower end ring 101, the outer circumferential surface of the lower end ring 101 is provided with the evenly distributed slot, and the outer circumferential surface of the lower end ring 101 is installed with the upper end ring 108 in cooperation, and the upper end ring 108 is circular ring structure, and the inner wall surface of the upper end ring 108 is formed with the groove in cooperation with the slot.

[0031] The end of the guide bar 104 is welded with the upper end ring 108 and the lower end ring 101.

[0032] The guide bar 104 is inserted into the groove.

[0033] The upper end ring 108 and the lower end ring 101 adopt interference fit.

[0034] The tension block 103 is an integral structure.

[0035] The section of the tension block 103 is trapezoidal.

[0036] The wedge groove 109 of the guide bar 104 is provided with an inner concave arc.

[0037] The utility model knocks into the tension block 103 at the tensioning mouth of the guide bar 104, so that the guide bar 104 is deformed at the end, and the guide bar 104 is in close contact with the rotor punching sheet 105, so that the guide bar 104 is firmly fixed on the rotor punching sheet 105.

[0038] The ventilation of the rotor ventilation groove plate 106 can wedge the guide bar 104 at the upper part.

[0039] The utility model discloses a winding no weft tape 102 between guide strip 104 and rotor punching sheet 105, can effectively reduce rotor air noise, and guarantee that the tensioning block 103 will not because centrifugal force throw out and influence motor operation.

[0040] The lower end ring 101 is provided with a slot, and the guide strip 104 can be inserted into the slot.

[0041] The upper end ring 108 and the lower end ring 101 are in interference fit, and the guide strip 104 is fixed in the groove formed by the upper end ring 108 and the lower end ring 101. The distance between the guide strip 104 and the end face of the end ring is about 3mm-4mm, and the distance is filled with solder, which is convenient for welding. Finally, the upper end ring 108, the lower end ring 101 and the guide strip 104 are firmly welded.

[0042] The closed slot guide strip mounting structure for the high-efficiency asynchronous motor can conveniently and quickly manufacture and install the rotor core. The rotor punching sheet 105 constitutes the main part of the iron core, the pressing ring 107 presses the rotor punching sheet 105, the guide strip 104 is located in the slotted part of the iron core, the end ring is used for connecting the guide strip 104 at the end, the tensioning block 103 is used for tensioning the guide strip 104 and the rotor punching sheet 105, the rotor ventilation slot plate 106 is used for heat dissipation of the iron core, and the no weft tape 102 and the glass silk tape can reduce noise and prevent the tensioning block 103 from falling off and damaging other components.

[0043] The utility model discloses a tensioning block 103, effectively solves the vibration problem caused by the looseness of the guide strip 104 caused by the gap between the guide strip 104 and the rotor punching sheet 105, greatly improves the working reliability of the motor, and brings great convenience to the installation. The above description is an explanation of the utility model, not a limitation of the utility model. The scope defined by the utility model is shown in the claims. Within the protection scope of the utility model, any form of modification can be made.

Claims

1. A rotor closed slot high efficiency asynchronous machine bar mounting structure, characterized by: The application relates to a rotor lamination (105) and a rotor ventilation slot plate (106) which are stacked in sequence, and a bar (104) is simultaneously arranged in the rotor lamination (105) and the rotor ventilation slot plate (106), the bar (104) is in a long strip structure, symmetric wedge grooves (109) are arranged at two ends of the bar (104), a tensioning block (103) is arranged in the wedge groove (109) in a matched mode, the tensioning block (103) is in close contact with the rotor lamination (105), a pressing ring (107) is further arranged outside the rotor lamination (105), the pressing ring (107) is used for pressing the rotor lamination (105), a no-wale belt (102) is wound on the pressing ring (107), a lower end ring (101) is arranged on the bar (104) outside the pressing ring (107), a plurality of uniformly distributed notches are formed in an outer circumferential surface of the lower end ring (101), an upper end ring (108) is arranged on the outer circumferential surface of the lower end ring (101) in a matched mode, the upper end ring (108) is in a circular ring structure, and a groove is formed by the inner wall surface of the upper end ring (108) and the notches.

2. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The end of the bar (104) is welded with the upper end ring (108) and the lower end ring (101).

3. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The bar (104) is arranged in the groove.

4. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The upper end ring (108) and the lower end ring (101) are in an interference fit.

5. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The tensioning block (103) is in an integral structure.

6. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The cross section of the tensioning block (103) is in a trapezoidal shape.

7. The rotor closed slot high efficiency induction motor bar mounting structure as claimed in claim 1, wherein: The wedge groove (109) of the bar (104) is provided with an inner concave arc.

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