JB/T 5174-1991 Injection nozzle assembly type and connection dimensions JB/T5174-1991 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5174-1991
Type and connection dimensions of injection nozzle pairs
Published on 1991-05-18
Implemented on 1992-01-01
Type and connection dimensions of injection nozzle pairs
Subject content and scope of application
JB/T5174-1991
This standard specifies the type and connection dimensions of P series, S series and T series injection nozzle pairs for medium and small power diesel engines. This standard is applicable to the classification of injection nozzle pairs, which are divided into three types: shaft needle type (including throttle shaft needle type), hole type and long hole type. Main structural dimensions of injection nozzle pairs
2.1 Dimensions and tolerances of shaft needle type injection nozzle pairs The dimensions and tolerances of shaft needle type injection nozzle pairs are shown in Figure 1 and Table 1. H
Oil inlet groove
2.2 Dimensions and tolerances of hole-type fuel injection nozzle pairs A
Figure 1 Pin-type fuel injection nozzle pair
10 -°4
30.5±0.2
I Enlargement
Except for dimension D in Figure 2, the hole-type fuel injection nozzle pair is the same as the pin-type fuel injection nozzle pair in Figure 1. Dimension D is shown in Table 2. Approved by the Ministry of Machinery and Electronics Industry on May 18, 1991 and implemented on January 1, 1992
Dimensions and tolerances of long hole-type fuel injection nozzle pairs 2.3
JB/T5 174-1991
Figure 2 Hole-type fuel injection nozzle pair
For the dimensions and tolerances of the S series and T series long hole-type fuel injection nozzle pairs, see Figure 3 and Table 32.3.1bzxZ.net
Oil inlet groove
Figure 3 S and T series long hole-type fuel injection nozzle pairsTable 3
ZCK...S..
For the position dimensions of the S series fuel injection nozzle pairs with positioning holes, see Figure 4. c
30.5±0.2
30.5±0.2
I Enlargement
Note: a is the recommended type.
JB/T5174-1991
Oil inlet hole position
Oil inlet hole position
Figure 4S series fuel injection nozzle pair
2.3.3P series fuel injection nozzle pair dimensions and tolerances see Figure 5, Table 4H
Oil inlet hole position
2 - 61. 9 +0. 025 Depth 4+ 0- 5
Medium 0. 06HG
Figure 5P series long hole type fuel injection nozzle pair
15-℃2
10.16±0.07
I Enlarge
Deep 4.5+!
Additional Notes:
JB/T5174-1991
This standard was proposed and managed by Wuxi Oil Pump and Nozzle Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Wuxi Oil Pump and Nozzle Research Institute of the Ministry of Machinery and Electronics Industry. From the date of implementation of this standard, the original NJ236-81 "Type and connection dimensions of fuel injection nozzles" will be invalid.
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