Some standard content:
JCS 47. 020. 50
Record number: 7726-2000
Ship Industry Standard of the People's Republic of China
CB/F3938-2000
Hydraulic Driven Air Explosion Fan
Gasfreeine fans with waler motor2000-09-20 Issued
National Defense Science, Technology and Industry Commission
2001-01-01 Implementation
CB/T3938-2000
Hydraulic Driven Air Explosion Fan is a kind of portable fan with fire water as power. It can be used to expel combustible, non-flammable, non-toxic and harmful gases. This standard was proposed by the Auxiliary Machinery Sub-Technical Committee of the National Technical Committee for Standardization of General Machinery, and this standard is under the jurisdiction of the 74th Institute of China Shipbuilding Heavy Industry Group Co., Ltd. The unit of this standard is the Seventh Research Institute of China Recycling Group Corporation. The main author of this standard is Wang Jin.
1 Scope
(B/T 3938-2000
Hydraulic Driven Air Explosion Fan
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging and storage of hydraulic driven air expulsion fans (hereinafter referred to as "hydraulic fans").
This standard is applicable to the design, selection and acceptance of hydraulic fans used in shipboard hazardous area navigation and firefighting systems. 2 Referenced Standards
The provisions contained in the following standards constitute the text of this standard by citing them in this standard. When the standard is published, the versions shown are valid. All standard departments will be revised in a chain. The parties using this standard should consider using the most appropriate version of the following standards. G191-20 Packaging
G3/T 965—1988
Type and dimensions of gas shielded welding, manual electric welding and gas shielded welding GB/T1173-1995bzxz.net
GB/T1176-1987
Cast yellow alloy technical version
G8/F 1236--2000
Industrial welding machine standard narrowing network performance test GB/T2868—1991
GB 383G.11483
CB 3B36. 2-1933
GB/T 4237-1992
GB/T 5117-1995
Blower and fan channel sound plate method
Explosion-proof electrical equipment for explosive atmospheres
Explosion-proof electrical equipment for explosive atmospheres
Carbon copper strip
GB/T6490.2-1986Test method for water turbine pumps GB/T8737-19BBSlag boiler chain
1Signboard
GB/T13306-1991
Technical regulations for packaging of electromechanical products
GB/T13384· 1992
3 Classification
3.1.1 According to the working principle, hydraulic fans are divided into two types: centrifugal and axial flow (see Figure 1, Figure 2). 3.1.2 According to the wind direction, hydraulic fans are divided into horizontal and vertical types. The left and right wind is horizontal, and the upper and lower wind is vertical. 3.1.3 Centrifugal hydraulic fans are horizontal structures, and axial flow hydraulic fans are vertical structures. 1
3.2 Seasons
CB/3938—2000
Figure 1 The main teaching of centrifugal hydraulic wind turbines is shown in Table 1,||t t||Centrifugal
Lai said, type
Impeller diameter
300753
2000~2.50:K
Charge 235*
BUD~15D
200~116n
Figure 2 Axial hydraulic fan
Inlet pressure
Regulation water pan
Production: The air inlet of the model is standard, that is, the atmospheric pressure is 101.33km, the temperature is 20, the relative humidity is 50%, and the air density is 1.2kg/z*.||t t||3.3 Type marking
3.3.1 Type guide group is as follows
Impeller diameter m
L-high center type
Axis type
Name 5-Water power fan
Application C-Marine
3.3.2 Marking example
CB/T3938-2000
) Centrifugal water power fan with impeller diameter of mm is marked as: Hydraulic fan CSI.—210CB/T393B-·20006) The standard ratio of axial hydraulic fan with impeller diameter of 300 is. Hydraulic fan CS2-300CB/T3958-20
4 Requirements
4.1 Environmental adaptability
Hydraulic fan should be able to work normally under the following environmental conditions;) The places where explosive mixed gas appears continuously or exists for a long time in accordance with GB3836.1 and GB386.7:
h) When conveying combustible, dry and explosive gas, steam or toxic and harmful gas, the hard particles contained in the gas shall not exceed 1mg/mm
) When conveying salty air and corrosive air such as oil mist d) Temperature, = 26C~55℃
e) The relative humidity shall not be greater than 95%,||t t||Grade conditions and numbers ±10°:
g) Heel ±15*, roll = 45 (period 3~146) 4.2 Structure
4.2.1 The overall structure of the hydraulic fan should be a spark-free structure. 4.2.2 The centrifugal hydraulic fan is a high-center fan impeller, water wheel, peach wheel and net shaft in series, which is composed of a turbine, a machine porcelain, an air inlet, a machine frame and a transmission body.
4.2.3 The shaft-washing hydraulic fan is an axial-flow fan impeller and a water turbine runner connected to the shaft, which is composed of a water turbine, a machine porcelain, a machine frame, a support frame and a transmission body.
4.2.4 The high-center hydraulic fan is regular from the water turbine, and the wheel can rotate clockwise when it is released. The right-hand hydraulic fan can be made into a structure with a 90\ axial wind speed and a right 225\ air supply. The two cannot be used interchangeably. 4.2.5 When looking from the turbine end, the impeller of the axial filter hydraulic fan should rotate clockwise. It is also a right-hand hydraulic fan. It can be used for exhaust or reverse wind. The two cannot be used interchangeably.
4.2.6 The air inlet of the centrifugal hydraulic fan is circular, and the air outlet is rectangular. 4.2 The air inlet of the axial flow hydraulic fan is made of a circular shape, and the air outlet is made of a rectangular shape. The internal impeller operation part of the axial flow hydraulic fan is fixed with a safety ring with a yellow sheath to prevent the impeller from rubbing or colliding with the machine to produce sparks. 4.2.B The diameter of the inlet and outlet of the hydraulic fan is 50mm, which can be used for fire protection valves of various fire protection systems. 4-3 Performance
4.3.1 The hydraulic fan should work normally when the inlet pressure is 0.2~-0.7MP2. There should be no stagnant water at the inlet and outlet ends and the shaft seal. 4.32 The relationship between the hydraulic fan's essential quantity-static pressure, inlet pressure-water consumption, and the performance of the hydraulic fan with static pressure changes should be included, and the relevant characteristic curves should be shown.
4.3.3 The pressure value of the hydraulic fan at rated working conditions should not exceed 15% of the specified value. 4.3.4 The perturbation intensity of the hydraulic fan at rated working conditions should not be greater than 7.1mm/s. 4.3.5 The sound pressure level of the hydraulic fan, the A sound band of the centrifugal hydraulic fan should not be higher than 90dB, and the axial flow hydraulic fan should not be higher than 95 dB.
4.3.6 After the impeller of the hydraulic fan runs at a speed exceeding 2D%, the blades and wheels of the cast impeller should not be cracked or damaged, the front and rear plates and wheels of the impeller should not be cracked or damaged, the rivets should not be loose, and the dimensional deformation of the two impellers should not be greater than 0.5/1000.
4.4 Materials
CB/T3938-2009
4.4.1 Parts made of aluminum alloy should comply with the provisions of GB3836.I, and the modulus content should not be greater than 0.5% (surplus ratio). 4.4.2 The materials supplied for the main components of the hydraulic fan should be determined according to Table 2. Table 2 Parts name Blade (high center or) Middle wheel (axial type> Housing, wind shield Handrail Frame, support frame Machine seat Safety ring Transmission body 4.5 Process Ge Pu Yong Stainless steel Stainless steel Austenitic stainless steel ZCuZn165i4 ICriANgTi ZA:5n5MR
1Cel7Ni2
ICr1sNigT
Q835-A
Explosion standard number
CE/T B737-1588
GB/T 42X7-1992
GR/T 1178-1995
CB/T 12201992
GB/T 4237 1992
GBT 7001988
GR/T5282--1588
GB/T699-1998
4.5.1 The casting of the main parts of the turbine - runner, containment shell and outlet pipe shall conform to GB/T 8737 and GB/T 1176 requirements, 4.5.2 The impeller of the heat flow hydraulic fan shall comply with the requirements of GB/1173, 4.5.3 The impeller of the centrifugal hydraulic fan shall be made of the stainless steel plate specified in GB/4237, after stamping and processing, and then welded, 4.5.4 The dynamic balancing accuracy of the impeller shall not be lower than G6.3, 4.5.5 The hole spacing tolerance of the hydraulic fan inlet and outlet flanges shall not be greater than ±0.5 mm. 4.5.6 The surface shape and position tolerance of the impeller shall not exceed the requirements of Table 3. #3
Before the blade is placed vertically
, the radial direction of the outer diameter of the disk is adjusted
, and the axial membrane at the outer diameter of the blade is raised
. The blade outlet height is increased
before the blade, and the rear vertical relative blade
The rear disk plane
moves slightly toward the outside
300750
is less than 4/1400 of the length
4.5.7 The installation angle of the impeller blade outlet of the centrifugal hydraulic fan shall not be greater than ±1*, and the deviation of the chord length of any three adjacent blades at the outlet shall not exceed% of the length.
4.5.9 The installation angle of each section of the blade of the auxiliary flow hydraulic fan shall not be greater than the upper 14.5.9 The shell and air inlet of the centrifugal fan shall be half-flat, and defects such as crushing, unevenness and sub-inclination are not allowed. The shape and position tolerance of the machine plate shall not exceed the specified values in Table 4.
Impeller diameter
Side plane
Plate coaxial construction
C/T 3938-2000
4. 5.10 The shape and position tolerance of the axial flow fan surface shall not exceed the provisions of 5.
Impeller straightness
Directional deviation
Parallelism of flange
300~-350
360-750
4.5.11 Carbon steel welded parts shall be welded in accordance with the basic requirements of GB/T5117. The basic types and dimensions of welded joints and welded joints shall comply with the requirements of GB85. Welding of austenitic stainless steel shall be carried out in accordance with relevant regulations. 4.5.12 The surface of the rivet should be flat. After welding, the wall should be cleaned and the deformation should be corrected. No defects such as piercing, cracking, and unwelded parts are allowed. 4.5.13 The rivet heads of rivet joints should be smooth and flat. Loose steel nails, tilted rivet heads, cracks and unwelded parts are not allowed. 4.5.14 The diameter of the rivet between the two joints shall not exceed 0.1mm, and the rest shall not exceed 0.3mm. 2.6 Appearance quality
4.6.1 The exposed surface of the stainless steel parts of the hydraulic fan should be polished. 4.62 The stainless steel parts of the hydraulic fan should be treated selectively, and after removing the primer, the surface should be smooth and clean, without defects such as rust, blistering, shedding and scratches.
4.7 Reliability
The average fault tolerance interval of the hydraulic fan (MTBF> is not less than 1000h. 5 Test method
5.1 Appearance inspection
Visually inspect the appearance quality of the whole machine. The result should meet the requirements of 4.6.1 and 4.5.2. 5.2 Reverse and sealing test
Requirements: The fan is rotated for 1h under the reverse water pressure of 0.2~-0.7M1a. The result meets the requirements of 4.3.1. 5.3 Pre-performance test
5.3.1 According to the provisions of GB/T1235 and GB/TF40.2, the test pipeline is correctly arranged (see Figure 3), and the following steps are required to measure and record the relevant data:
R: Adjust the water pressure from 0.2MPa to
a) When the water inlet pressure is adjusted from 0.2MPa to 0.7MPa, measure the change of hydraulic fan fluid volume under each water inlet pressure;
) When the water inlet pressure is adjusted from 0.2MPa to 0.7MPa, measure the change of hydraulic fan air volume static pressure under each water inlet pressure.
5.3.2 After the above test records are sorted out, the relevant data of air volume, static pressure and water inlet pressure consumption under each water inlet pressure condition when the water pressure is adjusted from 0.2MPa to 0.7MPa are obtained, and 6 sets of characteristic curves are drawn. The results should meet the requirements of 4.32 and 4.3.3.
5.4 Fuel balance test
CB/T3938-2000
The impeller is tested on a dynamic balance machine, and the result shall meet the requirements of 4.5.4. 5.5 Dynamic test
The hydraulic machine is operated at a water inlet pressure of 0.2~0.7 MFPa, and the hydraulic pressure (root mean square value) of the machine, flange up and down, left and right, front and back is measured. The result shall meet the requirements of 4.3.4. 5.6 Noise test
Measured according to the method specified in GB/T2855, the result shall meet the requirements of 4.3.5. 5.7 Impeller overspeed test
The qualified impeller is operated for 10M1 at a speed exceeding the rated speed by 20%, and the result shall meet the requirements of 4.3.6. 5.9 Drying proof test
According to the provisions of 21.1.2~21.1.4 in the fourth test of GB3835.1, at a drop height of 1 m, the static hydraulic fan casing is subjected to free fall three times (in three directions). After the test, the hydraulic fan can work normally. The results should meet the requirements of 4.2.1. 3 Hydraulic fan performance test layout
5.9 Actual ship test
The first hydraulic fan produced by the manufacturer shall be tested on the ship and passed the actual ship navigation assessment, and the rotation time shall not be less than 2001. The results shall meet the requirements of 4.1 to 4.7.
Stone inspection cross specification
6. 1 Inspection classification
Inspection and factory inspection of hydraulic fans 6.2 Type inspection
62.1 Type inspection or test should be carried out in any of the following situations: ) Trial production of new products
1) Products produced by a transferred factory:
c) When the product has major changes that may affect product quality: CB/T 3938-2000
When the factory inspection is different from the previous one: e) When the national quality supervision agency proposes to conduct type inspection f) When the user requires to avoid type inspection.
6.2.2 Type inspection items of hydraulic fans 6. 6
Inspection items
External control variable
Operation conversion test
Property test
Dynamic balance test
Dynamic bearing test
Production test
Speed test
Step service certificate
Actual ship test
Request number
4.6.1.4.6.8
4. 3. 2, 4. 5. 3
4. 3. Wan
She; Actual test of the first hydraulic wind turbine produced by Yinyanzi. 6.3 Factory Inspection
6.3.1 Each hydraulic fan shall be inspected before delivery. 6.3.2 Factory Inspection Items of Hydraulic Fan See Table 6, Test No.
Type of Cover
Factory Inspection
6.3.3 Inspection shall be carried out monthly according to the specified inspection items. Hydraulic fans that meet the requirements are qualified products. Hydraulic fans with poor efficiency, improper water inlet and outlet and oil-water seals are all unqualified and must be repaired and tested to meet the requirements before they can be shipped. 7.1 Labels
7.1.7 Hydraulic fans shall be equipped with a turning arrow and air direction label in an obvious position. 7.1.2 Product labels shall comply with the provisions of CB/T13306. The contents include: a) Product name;
1 Model +
c) Code 4;
d Manufacturer's name
e) Date of manufacture,
Ship inspection mark
g Source prevention mark: dCT6
7.2 Packaging and transportation
7.2.1. The hydraulic fan should be packed in a box. The packaging should comply with the requirements of B/13384. 7.2.2 The hydraulic fan should be leveled, clamped and bolted in the box. The disassembly tools and other spare parts should also be fixed in the empty space in the box to prevent displacement during transportation. 7.2.3 The hydraulic fan package should include: a) Product qualification certificate: b) General inspection certificate e) Product manual copy, packing list, e) Complete set supply package, CB/T3938-2000 7.2.4 The overall dimensions and weight of the packaging box should not exceed the regulations of the relevant transportation department. 7.2. 5 The structure of the packaging box should be suitable for lifting, moving and long-distance transportation, as well as multiple loading and unloading, atmospheric conditions, etc., and should be suitable for water and road transportation.
7.2.6 The signs on the packaging box surface should comply with the provisions of GB191. 7.3 Storage
7.31 The packaging box should be stored in a place where it will not be exposed to rain, sunlight and water erosion. The packaging box should be placed firmly on the ground and the distance from the ground should be 150mm.
Long-term storage in the warehouse should be in order to prevent the damage caused by the wind. Regular unpacking and inspection should be carried out. 7.3.2
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