JB/T 7697-2001 This standard is a revision of JB/T 7697-1995 "Technical Conditions for Metal Cooling Fans for Bulldozers". During the revision, product models and specifications, process detection of magnetic flaw detection of fan blades were added; the test methods and inspection rules for technical indicators such as noise were supplemented. This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, and storage of metal cooling fans for construction machinery. This standard is applicable to metal cooling fans for construction machinery with an outer diameter greater than 600mm. This standard was first issued in 1995, and this is the first revision. JB/T 7697-2001 Technical Conditions for Metal Cooling Fans for Construction Machinery JB/T7697-2001 Standard download decompression password: www.bzxz.net

ICS53.100
Machinery Industry Standard of the People's Republic of China
JB/T7697-2001
Metal cooling fan for construction machinery
Technical conditions
Construction machineryTechnical specificationsforall-metaltypecoolingfan
2001-04-03Promulgated
China Machinery Industry Federation
2001-10-01Implementation
JB/T7697-2001
Compared with JB/T7697-1995 "Metal Cooling Fan for Bulldozer 7697-1995", the main technical contents have been changed as follows: - Added the models and specifications of fan products; Added the detection process of magnetic flaw detection of fan blades; - Supplemented the test methods of fan disc sound, weight wind speed and driving power; Supplemented the content of inspection rules and adjusted the AQL value; Technical conditions".
The name of the standard is changed to "Technical specifications for all-metal type cooling fan for construction machinery". This standard replaces JB/T7697-1995 from the date of implementation. This standard is proposed and managed by the Mechanical Industry Engineering Machinery Standardization Technical Committee. This standard is similar to JB/T. The responsible drafting units of this standard are: Tianjin Engineering Machine Plate Research Institute, Shanghai Fengdie Engineering Machinery Parts Factory. The main drafters of this standard are: Yang Chengshan, Xu Xiangshan, Xi Rongting. This standard was first issued in 1995, and this is the first revision. Scope
Machinery Industry Standard of the People's Republic of China
Metal Cooling Fan for Construction Machinery
Technical Conditions
ConstruetionmachineryTechnical specificationsfor all-metal type cooling fanJB/T7697-2001
Replaces JB/T7697-1995
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging and storage of metal cooling fans for construction machinery.
This standard applies to metal cooling fans for engineering machinery with an outer diameter greater than 600mm (hereinafter referred to as fans) 2
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 700—1988
GB/T2828-1987
JB/T 59461991
JB/T51007—1992
Product classification
Carbon structure
Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) General technical conditions for engineering machinery painting
Reliability test method, fault classification and evaluation of crawler bulldozers Fan classification See Table 1, Figure 1 and Figure 2.
According to the structure
According to the air flow direction
Double tray fan
Double tray fan with fan selection
Forward type fan
Reverse type fan
Approved by China Machinery Industry Federation on April 3, 2001
Implemented on October 1, 2001
a) Double tray fan
Rotation direction
Air flow direction
a) Forward type fan
JB/T7697-2001
1-front and rear support plates; 2-blade selection; 3-blades
Figure 1 Classification by structure
b) Double support plate with blade feeding fan
Rotation direction
Air flow direction
b) Reverse fan
Figure 2 Classification by air flow direction (facing the diesel engine fan end) 3.2 Product marking method
3.2.1 The product marking consists of the following parts.口口口口
Standard number
Airflow direction code
Location hole diameter, mm
Outer diameter, mm
Structural type code
Product name
3.2.2 Marking example
JB/T7697-2001
The marking of the metal cooling fan for engineering machinery with double pallet and selection structure, outer diameter 870mm, positioning hole diameter Φ160mm, and positive airflow direction is:
Fan FSD870×160ZJB/T7697—20014Technical requirements
The fan assembly shall comply with the provisions of this standard and be manufactured according to the product drawings and technical documents approved by the prescribed procedures. 4.1
The positioning hole size of the fan and the static balance of the air room shall be in accordance with the provisions of Table 2. 4.2
Fan outer diameter D
Location hole size d
Static balance
Bolt hole diameter
4×413
6×Φ13
6×Φ13.5
6×Φ13.5
The fan blades and support plates are made of carbon structural steel, and their mechanical properties shall comply with the provisions of GB/T700. Bolt hole center diameter d
4.4The surface of the fan blades, feeder plates and support plates shall be smooth and flat, and shall not have defects such as cracks, rust, burrs, etc. 4.5The surface of the fan support plate shall be shot peened, and no transverse scars are allowed. One longitudinal scar with a length not exceeding 2mm and a width not exceeding 0.3mm is allowed.
4.6The riveting of the fan blades, feeder plates and support plates shall be firm and shall not be loose. 4.7 The fan assembly should be treated with anti-rust treatment, and then coated with anti-rust paint and topcoat, and comply with the provisions of JB/T5946. 4.8 When the fan outer diameter is less than or equal to 800mm, the fan's axial runout is 2.5mm, and when the fan outer diameter is greater than 800mm, the fan's axial runout is 3.0mm.
4.9 The installation angle deviation of the fan blade is ±1°4.10 The noise value of the fan assembly, the weight wind speed before the radiator and the driving power shall comply with the provisions of Table 3. 2
Fan outer diameter
Fan speed
Fan assembly reliability operation 1000h without failure. 5 Test method
JB/T7697-2001
≤100
≤100
≤105
≤105
≤110
≤110
≤115
≤115
5.1 The appearance quality, marking and packaging of the fan shall be inspected by visual inspection. Weight Wind speed
kg/(m2·s)
Infant power
5.2 The dimensional accuracy, position accuracy and installation angle of the fan blades shall be inspected by general measuring tools and special measuring tools. The static balance of the fan shall be measured in a static balance test on a special test bench. 5.3
5.4 Flaw detection
Magnetic flaw detection shall be carried out at the blade root of the fan. 5.5 Noise test
5.5.1 Test equipmentWww.bzxZ.net
The noise test device, measuring instruments and measuring points of the fan shall comply with the provisions of Figures 3 and 4. The measuring positions are LI and L in the single fan state: LI and Ly in the combined fan state. 5.5.2 Measuring points
The noise is measured at the fan speed corresponding to the engine. The fan speed can be selected from the equation 200×n (n=1, 2, 3..).
Representation of measurement results
The measurement value adopts A sound level, recorded as dB(A): The measurement results are shown in Figure 5. 5.6 Weight wind speed test
The weight wind speed test of the fan can be carried out at the same time as 5.5. 5.6.1
5.6.2 The test device, measuring position and measuring instruments shall comply with the provisions of Figure 6. 4
5.6.3 The measuring points shall comply with the provisions of 4.5.2.
JB/T 76972001
5:6.4 Read the wind speed (m/s), find the average of the measured values, and then calculate the weight wind speed. The value shall be expressed in accordance with the provisions of Figure 5. 5.7 Driving power test
5.7.1 The driving power test of the fan can be carried out simultaneously with 5.5. 5.7.2 The measuring points shall be in accordance with the provisions of 5.5.2.
5.7.3 The measured value is the product of the indicated value of the dynamometer and the fan speed. The value shall be expressed in accordance with the provisions of Figure 3. 5.8 Reliability test
The reliability test of the fan can be carried out simultaneously with the relevant tests of JB/T51007. Measuring positions L,, Ly, L,The height is
The center height of the fan
Radiator protection device
Radiator surface ratio
Radiator recommendation
Wind guide wing
Figure 3 Noise test device
Noise analyzer
Figure 4 Recorder
6 Inspection rules
6.1 Factory inspection
Jintong Jiajiajiahui Jingshang Shang
DC dynamometer
JB/T7697-2001
Wind island combination
Wind period monomer
Fixed point
50 F20014001600 18002000122002400 2600Fan speed
Figure 5 Measurement result
( 050[= ) SL1× 9
6 ×170 (1020
Location of wind speed measurement point
Figure 6 Weight wind speed test
Each fan must be inspected and qualified by the inspection department of the manufacturer before it can leave the factory. The inspection items include the fan's overall dimensions, fan positioning hole diameter, fan assembly static balance, fan blade installation angle deviation and surface quality. 6.2 Type inspection
6.2.1 Sampling plan and inspection level
The fan type inspection items shall be in accordance with the provisions of Table 4. Sampling inspection shall be in accordance with the provisions of GB/T2828, using a secondary sampling plan, A For Class C and Class B non-conformities, the general inspection level III shall be used; for Class B non-conformities, the special inspection level S-2 shall be used, see Table 4.6.2.2 Inspection batch N
Generally, the inspection batch N is 51~90.
6.2.3 Sampling plan
JB/T7697—2001
The sampling plan shall be in accordance with the provisions of Table 4, or determined by negotiation between the supply and demand parties. During the inspection, if the number of non-conformities for each item is equal to or less than the corresponding qualified judgment number (Ac), the batch of products shall be accepted, otherwise rejected. Table 4
Unqualified categories
Class A unqualified
Class B unqualified
Class C unqualified
7 Marking, packaging, transportation, storage
Inspection items
Diameter of positioning hole during wind period
Outer diameter of fan
Static balance of wind room assembly
Fan disc sound
Driving power
Weight Wind speed
Installation angle deviation of south wind blade
Reliability
End face runout of wind room blade
Fan Position of bolt holes
Surface quality
Rust prevention measures
Each fan should be marked with the manufacturer's name or trademark, product model and standard number. 7.1
Inspection level
General inspection level II
Special inspection level S-2
General inspection level II
7.2Each fan must be cleaned and treated with rust prevention before packaging, and then packed in a box with a fixed device. The box should be accompanied by a certificate of conformity signed by the inspector of the manufacturer's quality inspection department and a packing list. 7.3The outer surface of the box should be marked with:
a) Product name and model:
b) Manufacturer's name and address, zip code:
c) Quantity and total weight;
d) "Handle with care", "Moisture-proof", "Pressure-proof" and other words or symbols: e) Packing date.
7.4 The packed fans should be stored in a ventilated and dry warehouse. Under normal storage conditions, the manufacturer should ensure that the fans will not rust within 12 months from the date of leaving the factory.
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