This standard refers to ISO 4183-14980, ISO 2790-1980 and IS 255-1981. JB/T 6718-1993 Technical conditions for internal combustion engine cooling water pump V-pulley JB/T6718-1993 Standard download and decompression password: www.bzxz.net

J96 | | tt | | JB | |Released on 1993-07-29
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-01-01
Machinery Industry Standards of the People's Republic of China||tt| |Internal combustion engine cooling water pump V pulley
Technical conditions
JB/T6718-93
This standard adopts ISO4183-1980 ordinary V-belt, narrow V-belt and pulley", ISO2790- 1980 Narrow V-belt transmission for automobile industry - Dimensional standards" and ISO255-1981 "Pulley groove inspection for ordinary and narrow V-belt transmission". 1 Subject content and scope of application
This standard specifies the terminology, technical requirements, inspection methods, inspection rules and marking, packaging, transportation and storage of pulleys used for V-belt transmission of internal combustion engine cooling water tickets.
This standard is applicable to the V pulley (hereinafter referred to as the pulley) of the cooling water system of small and medium-power internal combustion engines. 2 reference standards
GB2828
Remote batch inspection and counting sampling procedures and sampling tables (applicable to continuous Batch inspection) GB6931.2V belt drive term
GB11356
GB11357
GB11544
3 term
3.1 slot top height h,||tt| |Pulley groove shape for ordinary and narrow V-belt transmission, check the pulley material, surface roughness and balance the dimensions of ordinary V-belt and narrow V-belt
The distance from the pitch line of the wheel groove to the top of the wheel groove.
3.2 Groove root height h
The distance from the wheel groove pitch line to the wheel groove base,
3.3 Groove end distance
The distance from the wheel groove center to the end face,| |tt||3.4 ??Other terms in this standard are connected to GB6931.2. 4 Technical requirements
4.1 The pulley should comply with the requirements of this standard and be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures. 4.2 Pulley groove type and size
The cross section of the ordinary V pulley groove is shown in Figure 1, and the cross section of the narrow V pulley and AV pulley groove is shown in Figure 2. The groove size and wheel angle of the pulley are shown in the table 1 and Table 2.
Figure 1
Approved by the Ministry of Machinery Industry on 1993-07-29
Ordinary V pulley groove surface
Implemented on 1994-01-01
1
Pulley model
Normal
V belt
Z
A
B
c
Hard V-belt
SPZ
SPA
SPB
SPC
AV8
AVie
AV13
AV15
base
wide skin
ba
8.5
11
14
19
sugar Item height
hea
2
2.75
3.5
4. 8
JB/T671893
Figure 2 narrow V pulley and AV pulley groove section
Table 1
valid
donation root height
hih
8.7
11|| tt||10.8
14
14.3
19
width
8.0
9. 7
12.7|| tt||15.2
Minimum view
Trough depth
he
9
11
14
14|| tt||Groove spacing
e
12±0.3
15±0.3
19±0.4
25.5± 0. 5
10.5±0.3
13.5±0.3
16.5±0.3
19. 5 ± 0. 4
Trough-tower distance
f
8±1
10
12.5Www.bzxZ.net
17
Measurement diameter
ds
9.g
11.6- 1.0
14.7-1.am
20-.m
7.15-.
7.95-5.atm
11.12-..||tt ||12.7-&.
mm
Correction value
X
6. 0
7.5
9.5
13
5.83
3.91
7.99
7.02
Note: According to GB11544, Z, A, B and C in the table are for pass-through V belts Model, SPZ.SPA.SPB.SPC is the narrow V-belt model AV8, AV10, AV13, AV15 is the AV pulley model
Table 2
Yu
Ordinary V-belt| |tt||A
B
c
2
wheel
type
number
narrow V-belt| |tt||SPZ
SPA
SPB
SPC
AV8
AV10
AV13
AV15||tt ||Base
p38
>80
>118
>190
>315
quasi
diameter| |tt||d4
p 34*
≤80
≤118
≤190
315
mm||tt| |Effective diameter
d.
36*
57
≥61
≥76
>102
4.3
JB/T6718—93
The minimum reference diameters of ordinary V-pulleys and narrow V-pulleys are according to Table 3. Table 3
Belt
4.4 Product Marking
Wheel
z
A
B
c||tt| |SP2
SPA
SPB
SPC
type
number
most
small
base
Accurate
50
75
125
200
63
90
140|| tt||224
straight
diameter
mm
4.4.1 The mark of the pulley consists of the product name, pulley groove type, pulley diameter, and manufacturing type ( Casting or sheeting), composed of plant number and standard number. Standard number
Number of grooves
Manufacturing type
Pulley diameter
Pulley groove type
Pulley
4. 4. 2
a.
b.
C
Marking example
Pulley, A-type wheel groove, base diameter 90mm, cast, two grooves marked as : Pulley A90Z2JB/T6718-93
Pulley SPB type wheel groove, reference diameter 100mm, made, one groove marked: Pulley SPB100ZJB/T671893
Pulley AV10 type wheel block, effective diameter 90mm, made of sheet metal, the two grooves are marked as pulley AV1090B2JB/T671893
The allowable deviation of the groove angle of the wheel groove is ±30°.
4.5
4.6 The surface roughness parameter R on both sides of the wheel groove is 3.2μm. 4.7 The radial and axial runout tolerance of both sides of the wheel groove facing the pulley axis is 0.40mm. 4.8 When measuring the cross-ball dimension K of a multi-groove pulley with a measuring rod, the K value of each groove of the same pulley should be consistent. The tolerance value is 0.05mm for every 25mm diameter, and the maximum value shall not exceed 0.30mm. 4.9 The symmetry plane of any cut surface of the wheel groove forms an angle of 90° with the plane passing through the pulley axis, and the maximum deviation is ±2°. 4.10 The requirements for pulley balance should be in accordance with GB11357. 4.11 The pulley is not allowed to have cracks, and the wheel grooves and positioning holes are not allowed to have casting defects such as bubbles and dents. The maximum thinning at the groove root of the sheet pulley must not be greater than 15% of the actual size of the sheet. The maximum thinning at the corners shall not be greater than 10%. 4.12 Narrow V-belts must not be used on pulleys specially designed for Botong V-belts. 4.13 The dimensional accuracy of the mounting positioning hole for the sheet-made pulley is IT9. 4.14 The pulley must be treated with anti-corrosion treatment.
5 Inspection Methods
5.1 Groove Angle Inspection
3
JB/T 6718-93
Use the limit gauge shown in Figure 3 according to GB11356 Check the pulley groove angle using the method shown in Figure 4. Figure 3 Limit gauge
Figure 4 Inspection of the angle
5.2 The distance between the centerline of the pulley groove and the datum plane can be detected with a special height measuring instrument. 5.3 The inspection of the reference diameter d is calculated according to the formula (1). d.=K-2X
+.(1)
In the formula, K---the outside of the two parallel measuring rods as shown in Figure 5 The distance between the cut planes is measured according to the correction value found in Table 1 and the diameter of the measuring rod as shown in Figure 1:
X
Correction value, see Table 1.
Figure 5
5.4 Effective diameter d. The test is calculated according to formula (2): d. = K-2 The distance height is measured according to the positive value found in Table 1 and the diameter of the measuring rod as shown in Figure 2:
X——Correction value, see Table 1.
5.5 The radial runout and axial runout of the wheel groove can be detected with special measuring tools. 6 Inspection Rules
6.1 Products must be inspected by the quality inspection department of the manufacturer before they can leave the factory. 6.2 Factory inspection
Before leaving the factory, the pulley should be inspected according to the provisions of 4.5~4.8 and 4.13. 6.3 Type inspection
Manufacturers should conduct type inspection of products once a year in accordance with the technical requirements specified in this standard. 4
JB/T6718-93
6.4, the pulleys are delivered and accepted in batches, and the delivery acceptance items are the same as the factory tests. When the ordering unit randomly inspects product quality, it should be carried out in accordance with the provisions of GB2828, using general inspection level 1, and its qualified quality level AQL value shall be negotiated by both parties. 7 Marking, packaging, transportation and storage
7.1 Mark
7.1.1 The product should be marked,
a. Factory name and trademark:
b. Product mark: | |tt||e.
Factory date or factory number.
7.1.2 The marking area shall comply with the product drawing regulations approved through prescribed procedures. It should remain intact during the use of the product. 7.2 Packaging
7.2.1
Each product should be packaged individually and then put into wooden boxes (or corrugated cartons). It should be ensured that the products are not damaged during transportation and storage. 7.2.2
Issue.
7.2.3
a.
b.
e.
7.2. 4
a.
b .
e
d.
The packaging box should be accompanied by a packing list signed by the manufacturer's packer. The product name, model, quantity and packaging should be noted on the packing list. Each product in the packaging box should be accompanied by a product certificate signed by the manufacturer's quality inspector. The certificate should indicate the name of the manufacturer;
product name and model;
date of manufacture and factory number.
The packaging box should be marked:
Manufacturer name and address;
Product name and model:
Quantity and total weight of the packaging box:
Appearance Size:
e
Date of manufacture.
7.3 Transportation
Products that are well packaged should be allowed to be transported by any positive belt method. 7.4 Storage
The product should be stored in a ventilated and dry warehouse. Under normal storage conditions, it should not rust within 12 months from the date of leaving the factory. Additional instructions:
This standard is approved by the machinery industry It was proposed and managed by the Shanghai Internal Combustion Engine Research Institute. This standard was drafted by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery Industry and Linhai Internal Combustion Engine Parts Factory. The main drafters of this standard are Wu Hongyun and Yang Shuzhang. 5
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