JB/T 2623-1994 Size and structure of brushes for motors JB/T2623-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2623
1994-12-09
JB/T2623
1995-06-01 ... 5779 Motor brush dimensions
3 Basic dimensions and tolerances
JB/T26231994
JB26231985
3.1 The main dimensions of the brush should be the tangential dimension (1), the axial dimension (a) and the radial dimension (r). As shown in Figure 1 and Figure 2, the expression sequence is, tX×r
Figure 1 Commutator brush
3.2 The basic dimensions of the brush should conform to the following values ​​Figure 2 Collector ring device
1.62,2.5,3.2, 4, 5, 6.3, 8, 10.12.5, 16, 20,25, 32, 40, 50,64,80, 100, 125mm.3.3 The basic size of the brush t, and the deviation shall comply with the provisions of Table 1. 3.3.1 For the deviation value of the sub-brush size +, the deviation value can be increased by 0.02mm. 3.3.2 For high thermal expansion brushes, such as gold graphite brushes or unfired stone brushes, the values ​​listed in Table 1 can be appropriately reduced or the tolerance band can be lowered, and the deviation range remains unchanged (specifically according to the requirements of the drawings). 150
JB/T2623
3.4 ​​The combination of basic brush dimensions t, a and 1 shall comply with the provisions of Table 2. 3. 4.1
The brush with larger value shall be carefully selected during design: the maximum value shall be selected from Table 2 when the size is greater than that specified in Table 2. 3. 4. 2 For brushes for special purposes, when the size is greater than that specified in Table 2, the value in Table 2 shall be selected from 3. 2. Limit deviation
JB/T2623
Continued Table 2
JB/T2623
Note: 0t,. The horizontal line under the number is the preferred combination value; the brush and brush and grip in the positive section are not recommended to use 10
Other dimensions of brushes
4.1 Brush chamfering
JB/T2623
4.1.1 The brush shall be chamfered at the intersection of the sides, as shown in Figure 3a. The angle of the chamfer shall be 45° and the chamfer value C shall comply with the provisions of Table 3. The chamfer may be slightly reduced.
Dimensions t and. The minimum value in
4.1. For split brushes (two-part or three-part), the chamfer value C shall be based on the overall dimensions t or. in Table 3. The space between the brushes (as shown in National 3) is not adjusted and may be slightly chamfered if necessary. 4.2 The contact inclination angle of the brush and the inclination angle of the brush top 4.2.1 The contact inclination angle of the brush (as shown in Figure 4) or the inclination angle of the brush top (as shown in Figure 5) shall comply with the provisions of Table 4. 4.2.2 When a is greater than 15 and the size t is greater than 8mm, the sharp edge can be removed by the brush manufacturer. 4.7.3 When 3 is greater than 15\, a small plane with a width of not more than 1 mm is allowed to be retained at the inclined end of the brush tip (as shown in Figure 6). 4.3 The working area of ​​the brush grip
4.3.1 There should be an interval on the brush tip that is opposite to the center line of the tip. There should be no special flexible wires in this interval (except for single brushes with special flexible wires in the middle). This interval is used for the remaining grip to work. Its width P value is related to the brush size a (National 7) or t (Figure 8). Its minimum value is shown in Table 5. Www.bzxZ.net
Figure 4
Connection gauge is inclined and brush head is inclined
JB/T2623
Max A 1tntn
0 7- 5*15* 22. 5* ~ 30°37. 50°. 5*
P(minimum)
4.3.2 When the brush size (Figure 7) or t (Figure 8) is 25mm, the width of the spring used for the grip is 12.5mm, the P value should be increased accordingly,
4.4 Depth of fixed flexible wire
4.4.1 The flexible wire of the brush should be fixed in an appropriate position on the top of the brush. The measurement method of the fixed depth q is consistent with the measurement direction (Figure 9 and Figure 10). For the electric wire of brush head material, the value of 9 is measured from the intersection of the head surface and the smaller plane (Figure 10).6
JB/T2623
4.4.29 The allowable value depends on t and a. The maximum value of 9 specified in Table 6, Table 2 and Table 8 is applicable to various types of electric materials, tolerances and different numbers of flexible wires. The effective use length of the brush should be greater than the value. The brush manufacturer should engrave the life line and other marks on the brush according to the user's requirements.
The q value (maximum value) of the first connection specification
Table? The q value (maximum value) of the second flexible wire 12.5
JB/T 2623
Continued Table?
Table 8 9 values ​​for four flexible wires
Preferred (maximum value)
4.4.3 For parallel and separate brushes, the 9 value should be selected from the same table as the single electric cutting cross section32
4.4.4 When the brush manufacturer uses the 9 value given in Table 6 and cannot ensure the good connection effect of the brush flexible wire, it should negotiate with the user to specify the 9 value separately
4.4.5 In the case where it is difficult or impossible to use the connection form shown in the figure, other methods can be used to fix the flexible wire. 4.5 The safe length im that must be retained for grinding brushes. 4.5.1 The size of rm (as shown in National 11) depends on the value of g, the components or parts installed on the body, and the value of the components used for pre-pressure purposes.
JB/T2623
Safety grinding wire for brushes
4.5.2 The size of rm is determined by the manufacturer according to the design of the brush. 4.5.2.1 For control, marking and other situations, rm is the minimum value. 4.5.2.3 For radial brushes and tilt brushes ≤15, rblood shall not be less than 0.35r. 4.5.2.3 For tilt brushes >15, rm value shall not be less than 0.3zo
4.5.3 If required by the user, the safe wear line shall be marked on the brush body, as shown in Figure 12. When the contact surface reaches any point on the line, the brush shall be scrapped.
Safety severe damage line
Safety wear warning line
4.5.4 The pressure system on the brush shall not be lower than the safe line. 4.6.1 Common terminal forms, specifications and sizes of applicable bolts for brushes shall comply with the provisions of Figures 13 to 16 and Tables 9, 10, 11 and 12. If other sizes are required, they can be determined according to actual conditions. 10 Bolt size JB/T2623 Open spade type Table 9 Spade type terminals Open flag type Closed flag type Closed flag type Bolt size Bolt size Open shoe type Note: 1) Only applicable to open II double shoe type terminals. JB/T2623
Flag terminal
Closed wave boot shape
Table 11 Double boot shape
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