QJR, QJS, QJRS, QJR-D, QJS-D, QJRS-D three fulcrum and base type crane reducer
The qJ series reducer is suitable for various related cranes and is also widely used in the transmission mechanism of various mechanical equipment such as transportation, metallurgy, mining, chemical industry, light industry and so on.
1 Wide reduction ratio range, nominal speed ratio 10-200,
2The mechanical transmission efficiency is high, the second-stage selection is 96%, and the third-stage is up to 94%
3 Smooth operation and low noise.
4 Because 42CrMo.35CrMo is used for forging and quenching and tempering, the gear shaft and gear are made separately, so the service life is long and the load capacity is high.
5Easy to disassemble and install
<XNUMX> Applicable conditions
1 Gear circumferential speed is not greater than16m/S.
2 The speed of the high-speed shaft is not more than 1000r, min,
3 The working environment temperature is40 ℃A 45'C
4 It can run in both directions.
<XNUMX> Model and speed ratio
1: Installation type
2: Output shaft end type
3: Assembly type
4: Nominal transmission ratio
5: Nominal center distance (output stage center distance)
6: Structure type
QJ: Crane reducer
Three-stage transmission of crane reducer, nominal center distance ai=560 mm, The nominal transmission ratio is 50, the assembly type is the first..., the output shaft end is the gear shaft end, and the horizontal installation is marked as: reducer QJS560-50...cw
5: Output shaft end type
4: Assembly type
3: Nominal transmission ratio
2: Nominal center distance (center distance of output stage)
-D: With base
QJ: Crane reducer
Two-stage reducer of crane with base, nominal center distance a1=560 mm, Nominal transmission ratio i=20, assembly type IV, shaft end type is P type, it is marked as: reducer QJR—D560-20 IVP
<XNUMX> Assembly type, installation type, shaft end type
1. There are nine types of assembly, as shown in Figure 1:
2. QJR, QJS, QJRS type installation type: horizontal W or vertical L (V) at the deflection angle ±a.Within the range, it is horizontal installation, and within the L range is vertical installation, as shown in the figure
Note:The degree of angle a is related to the transmission ratio. When the reducer is inclined at angle a, it should be ensured that the intermediate large gear is soaked with 1-2 teeth depth.
3. Types QJR, QJS, and ajRS are supported by three pivots, as shown in Figure 3.
4. Shaft end type: the high-speed shaft end is connected with a cylindrical shaft extension and flat key, and there are three types of output shaft ends (see Figure 4 and Tables 2, 3)
aP(T) type: cylindrical shaft extension flat key, single key connection;
Type bH(R): Cylindrical shaft extension and involute spline connection:
c.. Type C: Gear shaft end (only the reducer with a nominal center distance of 236-XNUMXmm has this shaft end type)
<XNUMX> Outline and installation dimensions
The appearance and installation dimensions of 1QJR are shown in Figure 5 and Table 4.
The appearance and installation dimensions of 2QJS are shown in Figure 6 and Table 5.
The appearance and installation dimensions of 3ajRS are shown in Figure 7 and Table 6.
4. The appearance and installation dimensions of aJR-D are shown in Figure 8 and Table 7.
The appearance and installation dimensions of QJS-D are shown in Figure 9 and Table 8.
The appearance and installation dimensions of QJRS-D are shown in Figure 10 and Table 9.
<950> The maximum allowable radial load at the output shaft end of the reducer (when n=14r/min) is shown in Table XNUMX
<XNUMX> Selection and lubrication of reducer
Where: the value kW in the PM5-power meter;
i-work level 1-8:
PMi- the power value kW relative to the Mi working level;
When selecting, the basic load Mmax=φ·Mn can be calculated according to the fatigue of each mechanism of the crane, and then converted with the speed to calculate the power Pwi=Mmax/9550
2 When selecting, you can also divide the calculated load by the coefficient K in Table 15, and then select it from the corresponding table.
4.Lubrication of reducer
The horizontal reducer shall be lubricated by splashing oil pool, and the vertical reducer shall be lubricated by circulating oil injection.The lubricating oil is L-CKC5903-L-CKC100 in GB/T220.
When the ambient temperature is lower than XNUMX℃, the user should have a lubricating oil heating device; when using oil pool splash lubrication, the oil temperature should be higher than XNUMX℃ to start; when using oil spray lubrication, the oil temperature should be higher than5 ℃It can be started only when.