Some standard content:
[CS23.124
Machinery Industry Standard of the People's Republic of China
JB/T9068—1999
Forward curved centrifugal fan
Forward curved centrifugal fan1999-07-12Published
National Machinery Industry Bureau
Implementation on 2000-01-01
JB/T9068—1999
This standard is a revision of ZBJ720469 forward multi-blade centrifugal duct fan. Compared with 2BJ7204690, the main technical contents of the standard have been changed as follows: Chapter 4 and Section 5 of ZBJ730469 are now combined into the 4th standard implementation specification to replace 7R172M6-90. This standard was proposed and managed by the Technical Committee for Standardization of Refrigeration Equipment. The responsible unit for initiating the order for this standard: Shangyutongchu-Carrier Air Conditioning Equipment Co., Ltd.: The main initiators of this standard: Yang Weirong and Zhang Wei. 1 Scope
Machinery Industry Standard of the People's Republic of China
Forward eurved centrifugal fan
Forward eurved centrifugal fan JBT9068-1999
This standard specifies the product classification, requirements, test methods, inspection rules, marking and packaging of forward eurved centrifugal fans. This standard is applicable to forward eurved centrifugal fans for building ventilation and air conditioning (hereinafter referred to as forward eurved centrifugal fans for room fan coil units) and is also used as a reference. 2 Reference standards
! The provisions contained in the listed standards have become the provisions of this standard after being cited in this standard. When this standard is issued, the versions shown are all valid. All standards will be revised. All parties using this standard are expected to use the latest version of the following standards: GB/F7551987
GBT117I1996
GB.T 1236·1985
GB/1804..1992
GR/T 2888—1991
GR.T3235—E982
GR.T38821995||GB.T 13306.--1991|| tt||JB/T T246-- [994
JB.T90621999
JB,T 9065-1999
JB/T9070—1999
3 Classification
Basic technical conditions for rotating electrical machines
Using V-belts
Testing methods for aerodynamic performance of fanswwW.bzxz.Net
General tolerances for linear dimensions
Testing methods for fans and fans
Basic types of fans Dimensional parameters and performance Average value Rolling target Calculation of external spherical surface Ball bearings and eccentricity Dimensions and stop gaps Safety requirements for fans
Appearance quality of cooling and ventilation equipment
Technical conditions for painting of heating and cooling equipment General technical requirements for packaging of cooling and heating equipment Balance of fans for air conditioners
3.1 Types of fans According to the table |Regulations
National Machinery Industry Bureau 1999-07-12 batch 200-01-01 bottle
Air inlet type
Energy conversion type
Transmission type
Mountain wind type
3.2 Marking
Sutong motor straight type
JE/T9068-1999
With light transmission
Outer rotor motor Bailian
Double-axis extension machine Bai
F's sleep
Quantity display x
The model of the fan is composed of English letters and numbers, and the expression method is as follows: 2
Model display:
19068—1999
Air outlet type code: surface!
Transmission type code: See Table 1
Application type code: See Table 1
Air inlet type line number: Table 1
Machine number: In decimeters of the impeller diameter: Specific speed: The specific speed at the highest efficiency is converted to an integer Total pressure coefficient: The total pressure coefficient at the highest efficiency is converted to an integer after 10
11-62g2.8-DZFT, that is, the total pressure coefficient is 11, the specific speed is 62, the impeller diameter is 280, single suction, left application: pulley drive, the air outlet type is a forward multi-blade centrifugal fan with upper horizontal. 11-62No4.5-HU total pressure coefficient is 1.1, specific speed is 62, impeller diameter is 450mm, double suction, right 4. The fan shall be manufactured in accordance with the provisions of this standard and the approved selection and technical documents. 4.2 The fan model and impeller diameter shall be in accordance with the provisions of Table 2. Table 2 Fan Model Impeller (blade outer diameter) Diameter Fan Machine Blade outer diameter: preferably impeller, blade outer diameter 4.3 The fan air inlet diameter D, rectangular air outlet size 4 and B (as shown in the figure) shall be in accordance with the provisions of Table 4 in G3235-1982 .
JB/9068-1999
The wind of the fan is drawn from the area shown in Figure 2a and Figure 2b. 4.4
JB/T9068-1999
JB/T9068-1999
4.5 The total pressure efficiency of the fan should be greater than the number shown in Figure 3. 6
4.6 Working environment requirements
4.6, 1 The temperature of the air delivered by the fan is -15~+60℃, and the relative humidity is 5%~98%. 900
4..2 The content of viscous matter, fiber matter, dust and other solid impurities in the air delivered by the fan should be below 1m/m. 4. Performance requirements for recovery
4.7. The root mean square value of the speed of the fan bearing support should be less than G.3mm/s, 4.? .2 The lubricant of the fan bearing should not leak out, 4.7.3 The fan should not make abnormal noise during operation. 4.7.4 The belt and pulley should not have abnormal deceleration 4.8 Main technical indicators
When the fan is at rated wind speed, its total pressure should be 9% or more of the rated total pressure value, 4.8.1
4.8.2 When the fan is at rated total pressure, its windage should be more than 95% of the rated wind value. When the fan is at the highest total efficiency and the speed does not exceed 10m, the limit value of the sound pressure level of its sound collection should not exceed G4. 8. 3
When the speed exceeds 1000r/min, the limit value of the sound pressure level above A is allowed to increase by no more than 2dB(A).
Fan model
Sound pressure level above A
4.9 Safety requirements
The safety requirements of the fan shall comply with the relevant provisions of B100. 6
4.14 Quality requirements of accessories
: The angle belt shall comply with the provisions of GD/T1171. 4.10.2 The motor shall comply with the provisions of CB/T755. The bearing shall comply with the provisions of B.T3S82.
4.11 Structural requirements of ventilation pillows
4.1 The load-bearing part and the static part of the fan shall not be mutually exclusive. 4. 11.2
The various parts of the fan shall have sufficient strength. The dimensional tolerances of the mechanical parts of the impeller shall comply with the provisions of 4-1 (4.1I.4) of B-1. The basic requirements of the impeller shall comply with the following provisions: The impeller shall meet the requirements of Table 4. The impeller shall meet the following requirements: The impeller shall meet the requirements of Table 4. The measured length of the impeller from the front disc to the full length of the impeller shall be about 1 meter. The tolerances shown in the table shall be the standard values of the length and size shown in the sample. Report 4 Pitch difference (external control) Blade assembly angle tolerance Length difference
Imperial production
) Impeller outer diameter 1, the diameter runout can be less than the specification in Table 5, Table 5
Imperial pen H
Wide disk outer diameter runout
External oil selection
Front disk outer diameter radial movement
Front disk outer axial movement
281-4n
450-1000
1External oil direction is measured at the side of the front disk or the outer diameter of the front disk, and the reading of the meter is the smallest value. 2External solid can be adjusted at the outer diameter of the disk or the disk, and the smallest difference can be obtained by the meter. ) The balance accuracy of the impeller should comply with the provisions of B/T9070. 4.12.2 The matching tolerances of the main shaft and the matching parts are as given in Table 6.1 The rust-free metal parts or surfaces used for ventilators shall be marked. The painted parts of ventilators shall comply with the relevant provisions of JH/T9062. 4.12.4 Parts of ventilators: pulley sleeves, shafts, pulley shafts, rolling bearings, upper and lower bearings, bearings, and chain guides. 4.13 Appearance quality requirements for ventilator parts and components JB/T9068-1999. The appearance of the components shall comply with the relevant provisions of IRT7216: 4.14 The ventilator components of the complete set shall include the following: 7
Transmission type points
A, G, H
4,.15 prohibited repair
matching cattle public
matching pulley
year, electric: three series, system
use in violation of the provisions of the product manual, from the date of manufacture! 18 months from the date of delivery, the actual use time exceeds 8000h, the product internal quality disc is damaged or cannot stop working, the manufacturer shall repair or replace it free of charge (excluding damaged parts)
5 test method
5.! The air dynamics test of the fan shall be in accordance with the provisions of GH1235: 5.2 Noise test shall be in accordance with the provisions of GB2888
5.3 Vibration and vibration test shall be in accordance with the provisions of GB10080, 5.4 Temperature test After the fan is in the stable temperature rise layer, the product shall be tested after 20m of operation. 6 Inspection rules
6.1 All parts and components of the fan shall be inspected by the quality inspection department of the manufacturer in accordance with this standard and relevant standards and technical specifications before they can be shipped out of the factory.
6.2 Various inspection regulations of the fan 6.2.1 Type inspection regulations are as follows:
a) Each model of the trial product shall be subject to type inspection, and the type inspection shall be carried out by the national competent department air conditioning inspection unit: b) The fan shall be subject to type inspection if the structure or material of the fan undergoes major changes. 8
Positive or negative
Axis power
Effective
6. 2.1 The sample inspection regulations are as follows
JB/T9068-1999
6.2.2.1 The number of units to be sampled is determined according to the schedule in Table 9. Production
-51-200
Selection quantity
Divided judgment number t
No individual judgment
6.2.2.2 Each type of duct fan in normal or batch production shall be sampled and inspected after factory inspection. If the number of unqualified products in the sample is less than or equal to the judgment number Ac, the batch of products is judged to be qualified; if the number of unqualified products in the sample is less than or equal to the judgment number R, the batch of products is judged to be unqualified.
Marking, packaging and storage
7.1 Marking
7.1.1 The fan should have a nameplate fixed in an obvious position. The type, size and content of the nameplate should comply with the requirements of GB/13306 and include:
a) Manufacturer's name:
b) Product model and name:
full speed:
motor speed:
month and year of manufacture:
h) Product serial number,
.1R/T91G name—199%
7.1.2 The fan should have a mark indicating the working condition (such as rotation direction). 7.1.3 Ventilator markings:
7.2.1 Ventilator packaging should comply with the provisions of IB/T9065 7.2.2 Technical documents listed on the packaging box: 7.2.3.1 Product certificate,
7.2.3.2 Product manual, the contents are as follows: product model and name, working principle, application, performance curve; h) product structure and installation instructions:
c) Installation instructions and requirements:
d) Instructions for use, maintenance and maintenance precautions. 7.2.2.3 Packing list,
3. Ventilator components should be stored in a ventilated room or shed, and the product should be protected from the high-temperature gas. 7.3.2 Exposed mechanical parts and components should be coated with anti-rust oil and grease, and sealed with oil paper, plastic film, etc., and the surface corrosion should be checked regularly.
7.3.3 The storage period is one year. Check in time after one year.
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