Method for adjusting junction box for motor

Abstract

The invention provides an adjustable junction box method for a motor, and the method comprises the following steps: 1, enabling a transition copper bar of an adjustable cable fixing hole and an insulation connection assembly to be fixed on a junction box body through bolts, and enabling a plurality of locking PGs to be uniformly distributed on the junction box body according to the number of outgoing cables required by the motor; 2, two ends of the transition copper bar with the adjustable cable fixing hole are connected with an insulation connection assembly; 3, a plurality of rows of threaded holes or oval long holes are formed in the transition copper bars with the adjustable cable fixing holes, and the threaded holes or the oval long holes are aligned with a plurality of locking PGs on the junction box body and used for being connected with cables. According to the invention, accurate connection and positioning of the hard copper bar and the conducting bar are ensured; and cable outgoing of the wind driven generator is facilitated.

Description

Technical Field

[0001] The invention relates to the field of motor design, and in particular to a method for an adjustable junction box for a motor. Background Art

[0002] In the current design of large wind turbines, hard copper bars are usually used as the outlet. These hard copper bars need to be welded to the conductive bars in the junction box, or directly mechanically connected to the cables, and then the cables are connected from the outlet holes of the junction box. These two connection methods require the hard copper bars to be welded to the winding end rings accurately. However, after the varnish treatment, the spatial position of the hard copper bars is fixed and cannot be adjusted.

[0003] In the process of connecting the hard copper busbar to the conductive busbar, and in the connection between the conductive busbar and the cable, it is necessary to ensure that the connection positioning of the hard copper busbar and the conductive busbar is accurate. On the one hand, if the positioning is inaccurate, it may cause the overlap between the copper busbar and the conductive busbar to be misaligned, insufficient overlap area, uneven contact surface, and poor welding quality. On the other hand, the cable is forced to bend and fix due to the inaccurate positioning of the hard copper busbar, which may damage the fixing bolts and even cause the cable to fail to come out normally. In the worst case, these problems may cause the motor to overheat, which in turn causes the cable to burn, or even the generator to burn. Therefore, ensuring the accurate connection positioning of the hard copper busbar and the conductive busbar is crucial to ensure the normal operation of the motor and extend its service life.

[0004] The output structure of the motor is an important part of the motor design, which is related to the electrical connection and overall layout of the motor. The output structure includes a junction box fixed on the outer surface of the casing, a stator lead-out hard copper busbar, a conductive busbar, a cable fixing frame and a cable tightening piece. The junction box is located at the corner of the casing. The stator lead-out hard copper busbar and the conductive busbar are connected to the junction box and connected to the cable. The cable is fixed and led to the outside through a cable tightening piece. However, as the motor power increases, the number of cables increases, and the motor structure tends to be compact, there are more and more abnormal output problems caused by inaccurate positioning of the lead-out hard copper busbar and the conductive busbar. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses an adjustable junction box method for a motor, which ensures the precise connection and positioning of the hard copper busbar and the conductive busbar, thereby avoiding a series of problems caused by inaccurate positioning.

[0006] Step 1: Fasten the insulation connection assembly to the junction box body, and evenly distribute several locking PGs on the junction box body according to the number of outgoing cables required by the motor; Step 2: a plurality of transition copper bars with adjustable cable fixing holes are sequentially arranged in the junction box body from top to bottom; both ends of each transition copper bar with adjustable cable fixing holes are connected to the insulating connection assembly through a connecting structure; the connecting structure is a fixed end arranged at both ends of the transition copper bar with adjustable cable fixing holes; a stator end ring connecting bar is arranged on the transition copper bar with adjustable cable fixing holes; Step 3: Multiple rows of threaded holes or elliptical long holes are opened on the transition copper busbar of each adjustable cable fixing hole for connecting cables, so as to facilitate alignment with multiple locking PGs on the junction box body.

[0007] Furthermore, the insulating connection assembly adopts two structures to ensure the electrical distance between the transition copper bar of the adjustable cable fixing hole and the junction box body.

[0008] Furthermore, the insulating connection assembly includes an insulating block, a bolt fixing pin and a pin bolt; the fixed end is in the shape of a straight plate and has two symmetrical U-shaped grooves at the end; wherein the fixed end is arranged at one end of the insulating block, and the first locking bolt passes through the U-shaped groove and is fastened to the insulating block; the other end of the insulating block is provided with an inserted bolt fixing pin, and the fixing pin bolt passes through the junction box body and is screwed into the threaded hole of the bolt fixing pin.

[0009] Furthermore, the bolt fixing pin is a cylindrical pin with a threaded hole in the middle.

[0010] Furthermore, the insulating connection assembly includes an insulator and a fixing copper bar bolt; the fixing end is an upwardly protruding bent portion; wherein the fixing copper bar bolt passes through a threaded hole of the insulator and is fixed to the junction box body.

[0011] Furthermore, the connection portion between the bending portion and the transition copper busbar of the adjustable cable fixing hole is in an arc-shaped transition shape.

[0012] Furthermore, the insulator is cylindrical and has threaded holes on both end surfaces.

[0013] Furthermore, the two structures of the insulating connection assembly are used in combination or one of them is selected. Beneficial effects of the present invention: 1. Solved the installation abnormality problem caused by inaccurate positioning of hard copper busbar and conductive busbar during the production process; The problem of cable failure due to inaccurate positioning of the hard copper busbar is solved.

[0014] 2. Reduce the difficulty of production with high requirements on the motor lead position.

[0015] 3. The adjustable junction box method of the present invention is beneficial to the cable outlet of the wind turbine generator; it ensures the accurate connection and positioning of the hard copper busbar and the conductive busbar, thereby avoiding a series of problems caused by inaccurate positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , a schematic diagram of the structure of the present invention; Figure 2 , the axonometric measurement of the present invention Figure 1 ; Figure 3 , the axonometric measurement of the present invention Figure 2 .

[0017] Figure 4 ,for Figure 2 A partial enlarged view of middle II; Figure 5 ,for Figure 3 A partial enlarged view of middle I; Figure 6 , is a schematic diagram of the fixed end structure with a U-shaped groove; List of reference numerals: 1-Transition copper bar with adjustable cable fixing hole; 2-Insulation connection assembly; 3-Locking PG; 4-Stator end ring connection bar; 5-Terminal box body; 6-Bolt fixing pin; 7-Fixing pin bolt; 8-Insulation block; 9-Fixing copper bar bolt; 10-Insulator; 11-Fixed end; 12-First locking bolt. DETAILED DESCRIPTION

[0018] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figure 1 As shown, a method for using an adjustable junction box for a motor in this embodiment includes the following steps: Step 1: Fasten the insulating connection assembly 2 to the junction box body 5, and evenly distribute several locking PG3 on the junction box body 5 according to the number of outgoing cables required by the motor; Step 2: A plurality of transition copper bars 1 with adjustable cable fixing holes are sequentially arranged in the junction box body 5 from top to bottom; both ends of each transition copper bar 1 with adjustable cable fixing holes are connected to the insulating connection component 2 through a connecting structure; the connecting structure is a fixed end 11 arranged at both ends of the transition copper bar 1 with adjustable cable fixing holes; a stator end ring connecting bar 4 is arranged on the transition copper bar 1 with adjustable cable fixing holes; Step 3: A plurality of rows of threaded holes or elliptical long holes are opened on each of the transition copper bars 1 of the adjustable cable fixing holes for connecting cables, so as to facilitate alignment with the plurality of locking PGs 3 on the junction box body 5 .

[0020] like Figure 2-6 As shown, the insulating connection component 2 adopts two structures to ensure the electrical distance between the transition copper bus 1 of the adjustable cable fixing hole and the junction box body 5.

[0021] like Figure 4 As shown, the insulating connection assembly 2 includes an insulating block 8 (such as EPGC308 or other materials), a bolt fixing pin 6 and a pin bolt 7; wherein the bolt fixing pin 6 is inserted into the middle circular hole of the insulating block 8, and the fixing pin bolt 7 is screwed into the threaded hole of the bolt fixing pin 6 and fixed to the junction box body 5; the bolt fixing pin 6 is a cylindrical pin with a threaded hole in the middle.

[0022] like Figure 5 As shown, the structure corresponding to another insulating connection component 2 is that the insulating connection component 2 includes an insulator 10 (such as resin, mica, alumina, etc.) and a fixing copper bar bolt 9; the insulator 10 is cylindrical and has threaded holes on both end faces.

[0023] The fixing end 11 is a bent portion protruding upward; wherein the fixing copper bar bolt 9 passes through the threaded hole of the insulator 10 and is fixed to the junction box body 5; wherein the connection portion between the bent portion and the transition copper bar 3 of the adjustable cable fixing hole is an arc-shaped transition shape.

[0024] The insulating connection assembly 2 of this embodiment can be combined left and right, combined up and down, or used alone according to different requirements, which increases the convenience of operation.

[0025] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A method for an adjustable junction box for a motor, characterized in that: The following steps are involved: Step 1: Fasten the insulating connection assembly (2) to the terminal box body (5), and evenly distribute several locking PGs (3) on the terminal box body (5) according to the number of outgoing cables required by the motor; Step 2: a plurality of transition copper bars (1) with adjustable cable fixing holes are sequentially arranged in the junction box body (5) from top to bottom; both ends of each transition copper bar (1) with adjustable cable fixing holes are connected to the insulating connection component (2) via a connection structure; the connection structure is a fixed end (11) arranged at both ends of the transition copper bar (1) with adjustable cable fixing holes; a stator end ring connection bar (4) is arranged on the transition copper bar (1) with adjustable cable fixing holes; Step 3: A plurality of rows of threaded holes or oval long holes are opened on each of the transition copper bars (1) of the adjustable cable fixing holes for connecting cables, so as to facilitate alignment with the plurality of locking PGs (3) on the junction box body (5).

2. The method for an adjustable junction box for a motor according to claim 1, characterized in that: The insulating connection assembly (2) adopts two structures to ensure the electrical distance between the transition copper busbar (1) of the adjustable cable fixing hole and the junction box body (5).

3. A method for an adjustable junction box for a motor according to claim 1 or 2, characterized in that: The insulating connection assembly (2) comprises an insulating block (8), a bolt fixing pin (6) and a pin bolt (7); the fixing end (11) is in the shape of a straight plate and has two symmetrical U-shaped grooves at the end; the fixing end (11) is cushioned at one end of the insulating block (8), and a first locking bolt (12) passes through the U-shaped groove and is fastened to the insulating block (8); an insertion bolt fixing pin (6) is provided at the other end of the insulating block (8), and the fixing pin bolt (7) passes through the junction box body (5) and is screwed into a threaded hole of the bolt fixing pin (6).

4. The method for an adjustable junction box for a motor according to claim 3, characterized in that: The bolt fixing pin (6) is a cylindrical pin with a threaded hole in the middle.

5. A method for an adjustable junction box for a motor according to claim 1 or 2, characterized in that: The insulating connection assembly (2) comprises an insulator (10) and a copper bar fixing bolt (9); the fixing end (11) is a bent portion protruding upward; wherein the copper bar fixing bolt (9) passes through a threaded hole of the insulator (10) and is fixed to the junction box body (5).

6. The method for an adjustable junction box for a motor according to claim 5, characterized in that: The connection portion between the bending portion and the transition copper busbar (3) of the adjustable cable fixing hole is in an arc-shaped transition shape.

7. The method for an adjustable junction box for a motor according to claim 5, characterized in that: The insulator (10) is cylindrical and has threaded holes on both end surfaces.

8. The method for an adjustable junction box for a motor according to claim 2, characterized in that: The two structures adopted by the insulating connection component (2) are used in combination or one of them is selected for use.

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