Some standard content:
ICS73.120
Machinery Industry Standard of the People's Republic of China
JB/T7890-1999
Fan Coal Mill
Beaterwheelmill
Published on 1999-06-28
National Bureau of Machinery Industry
Implemented on 2000-01-01
JB/T7890-1999
This standard is a revision of JB/T7890--95 "Fan Coal Mill". Compared with JB/T7890-95, the main technical content of this standard has been changed as follows: the product model is standardized according to the relevant provisions of JB/T1604-1998 "Method for Compiling Models of Mining Machinery Products"; the requirements for safety and environmental protection have been added.
This standard replaces JB/T7890-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Mining Machinery. The drafting unit of this standard is Shenyang Heavy Machinery Group Co., Ltd. The main drafters of this standard are Ma Yu and Guo Ming. This standard was first issued in April 1988 as GB9077-88, and the standard number was adjusted to JB/T7890--951 in April 1996. Scope
Machinery Industry Standard of the People's Republic of China
Fan Coal Mill
Beater Wheel Minl
JB/T 78901999
Replaces JB/T7890-95
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fan coal mills.
This standard applies to fan coal mills (hereinafter referred to as fan mills), which are used to dry and grind bituminous coal and coal, and can also be used to grind fragile materials such as low-hardness limestone and gypsum. 2 Reference 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. GB191—1990
GB/T 700—1988
GB/T 1184—1996
GB/T 1801—1979
GB/T 18041992
GB/T3077—1988|| tt | 113451989 | | tt | —1999
JB/T 5000.12---1998
Packaging, storage and transportation pictorial symbols
Carbon structural steel
Shape and position tolerances without tolerance values
Tolerances and fit dimensions up to 500mm, tolerance zones and fits for holes and shafts, tolerance zones and fits for holes and shafts larger than 500mm to 3150mm, general tolerances, unspecified tolerances for linear dimensions
Alloy structural steel, technical conditions
General technical conditions for hydraulic systems
High manganese steel castings
Ultrasonic flaw detection and quality rating standards for steel castingsDetermination of allowable imbalance of rigid rotor balance qualityGray iron castings
Cone tolerance
Manual ultrasonic flaw detection method and flaw detection result classification of steel weldsCasting carbon steel parts for general engineering
Cone fit
General technical conditions for packaging of electromechanical products
Method for compiling product models of mining machinery
General technical conditions for free-plating forgings on hammers
Heavy machinery General technical conditions for coating
Approved by the State Machinery Industry Corporation on June 28, 1999 and implemented on January 1, 2000
, types and basic parameters
JB/T7890-1999
3.1 Fan mills are divided into two types according to the quality of the coal being ground: bituminous coal type (MF type) and coal-mining type (MFH type), as shown in Figures 1 and 2 (the figure does not determine the specific structure of the fan mill)
1—Extension end section: 2 Gate: 3—Impact wheel; 4 Points Separator; 5 housing: 6 bearing box: 7- coupling: 8- motor: -9- foundation; 10- bearing box support Figure 1 MF type
1- expansion joint; 2- separator: 3- gate: 4- machine light: 5- impact wheel: 6- bearing box: 7- bearing box support: 8 coupling: 9- motor; 10- foundation Figure 2 MFH type
JB/T7890—1999
The model representation method of fan mill shall comply with the provisions of JB/T1604. 3.2
MFH-口
3.3 Model example:
Impact wheel width, dm
Impact wheel diameter, dm
Lignite type (bituminous coal type is not noted)
Fan type
a) Wind room mill for grinding bituminous coal with an impact wheel diameter of 3400mm and an impact wheel width of 700mm: MF-3407 fan coal mill
b) Fan mill for grinding lignite with an impact wheel diameter of 3400mm and an impact wheel width of 780mm: MFH-3407. Fan side coal machine
The basic parameters of the fan mill shall comply with the provisions of Table 1 and Table 2. Table
MF bituminous coal fan mill basic parameters
MF-0902
MF1002
MF1602
MF-1503
MF-2102
MF-2204
MF-2704
MF-2705
MF-2707
MF-3106
MF-3407
MF3408
MF-3811
Impact wheel diameter
Impact wheel width
Production capacity
Ventilation volume
105000
116000
126000
135000
! The bituminous coal fan mill is suitable for drying and grinding bituminous coal and hard lignite with a moisture content of less than 35%. Wind pressure
Motor power
2The production capacity in the table refers to the production capacity of the fan mill under the designed ventilation state when grinding coal with total moisture of 12%, dry basis ash less than 5%, Hastelloy density index of 60, coal powder fineness R90 of 25%, and separator outlet temperature of 120℃. No.
MFH1603
MFH1604
MFH1605
MFH-2005
MFH-2104
MFH2605
MFH-2706
MFH-3106
MFH-3108
MFH-3407
MFH3609
MFH-3610
Wheel diameter
JB/T 7890-1999
Table 2 Basic parameters of MFH lignite fan mill
Impact wheel width
Production capacity
Ventilation volume
110000
120000
130000www.bzxz.net
150000
240000
270000
1 Lignite fan mill is used for drying and grinding lignite and woody coal with moisture content of 35%-70%. Wind pressure
Motor power
2 The production capacity in the table refers to the production capacity of the coal with total moisture content of 60%, Hastelloy separability index of 60, and coal powder fineness R90 of 30% under the designed ventilation condition during the wind period, and the outlet temperature of the separator is 120℃. 4 Technical requirements
4.1 Basic requirements
4.1.1 Fan mills shall comply with the provisions of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. 4.1.2 Forgings shall comply with the relevant provisions of JB/T4385.1. 4.1.3 Cast iron parts shall comply with the relevant provisions of GB/T9439. 4.1.4 Plates and profiles used in steel structures shall comply with the provisions of GB/T700. 4.1.5 Shape and position tolerances shall comply with the relevant provisions of GB/T1184. 4.1.6 Unnoted tolerances of linear dimensions on the drawing shall comply with the relevant provisions of GB/T1804. 4.1.7 Tolerances of holes and shafts on the drawing shall comply with the relevant provisions of GB/T1801 or GB/T1802. 4.1.8 High manganese steel castings shall comply with the provisions of GB/T5680. 4.1.9 Carbon steel castings shall comply with the provisions of GB/T11352. 4.2 Machine performance requirements
4.2.1 Fan mills shall be able to adapt to the requirements of furnace smoke drying or hot air drying. 4.2.2 Fan mills shall ensure long-term normal operation within the range of -20~+45℃. 4.2.3 Impact wheels and wearing parts of fan mills of the same model and specification shall be interchangeable. 4.2.4 The adjustment of the separator baffle should be flexible and reliable. 4
4.2.5 The opening and closing of the coal mill door should be flexible and reliable. 4.2.6 The lifting and lowering of the telescopic joint should be flexible and reliable. JB/T 7890—1999
4.2.7 The joints of the fan mill should be tightly sealed and no powder should leak. 4.2.8 Dust should not enter the bearing, and oil leakage of the bearing box is not allowed. The hydraulic lubrication system of the bearing box should comply with the provisions of GB/T3766. 4.2.91
The fan mill coupling should be equipped with a safety protective cover. 4.2.10
The fan mill should have the following reliability indicators: 4.2.11
a) The total working time before the first overhaul period is not less than 10,000 hours; b) The service life is not less than 100,000 hours;
c) The service life of the impact plate should not be less than 1,000 hours. 4.2.12 The bearing temperature rise shall not exceed 35℃. 4.3 Requirements for main components
4.3.1 The front and rear discs and connecting beams of the fan mill impact wheel shall be inspected by flaw detection and meet the requirements of Grade 1 in GB/T7233. 4.3.2 The striking plate of the impact wheel shall be made of austenitic high manganese steel ZGMn13-1 with performance not lower than that in GB/T5680: 4.3.3 The heat treatment hardness of the fan mill spindle shall reach 228-269HB, and the material mechanical property test shall be required, which shall meet the requirements of Table 3 Table 3 Mechanical properties of spindle materials
Yield strength
≥375
Tensile strength
Elongation
4.3.4 The wall thickness of the connecting beam shall be checked, and its allowable deviation shall meet the requirements in the design technical documents. Impact value
4.3.5 The impact wheel shall be subjected to static balance test before and after the impact plate is assembled, and its static balance quality shall meet the requirements of G6.3 in GB/T9239.
4.3.6 The taper tolerance of the impact wheel's bore and the spindle taper section shall be in accordance with the provisions of GB/T11334, and the fit tolerance shall be in accordance with GB/T12360. The contact rate between the impact wheel's taper hole and the spindle taper section shall not be less than 80%. 4.3.7 The clearance between the impact wheel and the housing shall meet the requirements of the technical documents. 4.3.8 The double-row bearing in the bearing box shall meet the requirements of the technical documents. The operating temperature of the double-row bearing shall not exceed 70℃. 4.3.9 The bearing seat shall be ultrasonically inspected in accordance with GB/T7233 and meet the requirements of level 2. 4.3.10 The joint seam of the impact wheel front disc and the hub guard ring shall be ultrasonically inspected and meet the requirements of level Ⅱ·B in GB/T11345. 4.4 Safety requirements
4.4.1 The noise value of the fan when running with no load should not exceed 85dB(A). 4.4.2 When the fan is running with no load, the vertical and horizontal amplitudes measured on the bearing seat shall not be greater than 0.050mm (single bee value). 5 Test methods
5.1 Each product shall be tested for complete machine assembly and no load test at the manufacturer before leaving the factory. 5.2 In the T-turn test, each rotating part shall rotate flexibly and reliably without jamming. JB/T7890—1999
5.3 The main parts of each product shall be inspected with universal measuring tools, and the taper measurement shall be inspected with a special taper measuring instrument. 5.4 The noise shall be measured at 1.5m outside the machine according to the provisions of GB/T3768. 5.5 The horizontal and vertical amplitudes shall be measured on the bearing seat with a vibration meter, which shall comply with the provisions of 4.4.2. 5.6 Each fan mill shall be tested at rated speed with no-load for 6 to 8 hours and in accordance with the provisions of 4.2.12. 6 Inspection rules
6.1 Sampling method
6.1.1 The sample for finished product inspection shall be taken from the qualified products in storage. 6.1.2 Samples in the production process shall be taken from the qualified parts in the storage or disassembled for inspection by the whole machine (the parts of large products can be based on the inspection record of the process of the product).
6.2 Inspection classification
Inspection is divided into factory inspection and type inspection.
6.2.1 Factory inspection
Each product must be inspected at the factory, and its content and requirements shall comply with the provisions of 4.2.3-4.2.9, 4.4.1 and 4.4.2. At the same time, the following inspections should also be carried out:
a) In the manufacturer, the fan mill is inspected for appearance quality, relevant dimensions and no-load test run: b) The no-load test run is carried out in accordance with the provisions of the design technical documents, and the coal mill is continuously operated for 6~8h, but it is allowed to end when the bearing temperature remains constant in the last 2h.
6.2.2 Type inspection
Type inspection should be carried out in any of the following situations: a) New products under development or trial production and identification during factory transfer; b) After formal production, if there are major changes in the structure, design, process or materials of the product; c) When the national quality supervision agency proposes a type inspection requirement. The content of type inspection should include all the requirements of this standard. 7. Marking, packaging, transportation and storage
7.1 Products should be marked with product labels in obvious locations. Its type and size shall comply with the provisions of GB/T13306, and shall indicate the following: a) Product name and model
b) Main technical parameters;
c) Factory number;
d) Manufacturing date;
e) Manufacturer name.
7.2 Product packaging shall comply with the provisions of GB/T13384, and the packaging storage and transportation graphic signs shall comply with the provisions of GB191. 7.3 Products shall be packaged according to the packing list and shall meet the requirements of water and land transportation. 7.4 Products shall be stored in a well-ventilated room or under a shed during the storage period, and electrical equipment shall be protected from moisture. Regular maintenance shall be carried out during storage to prevent parts from rusting and damage.3 The heat treatment hardness of the fan grinding spindle should reach 228-269HB, and the material mechanical properties test is required to meet the requirements of Table 3 Table 3 Mechanical properties of spindle materials
Yield strength
≥375
Tensile strength
Elongation
4.3.4 The wall thickness of the connecting beam should be checked, and its allowable deviation should meet the requirements of the design technical documents. Impact value
4.3.5 The impact wheel should be subjected to static balance test before and after the impact plate is assembled, and its static balance quality should meet the requirements of G6.3 in GB/T9239.
4.3.6 The cone tolerance of the impact wheel's taper hole and the spindle's taper section shall be implemented in accordance with the provisions of GB/T11334, and the matching tolerance shall be implemented in accordance with GB/T12360. The contact rate between the impact wheel's taper hole and the spindle's taper section shall not be less than 80%. 4.3.7 The clearance between the impact wheel and the housing on both sides shall meet the requirements of the technical documents. 4.3.8 The double-row bearing in the bearing box shall comply with the provisions of the technical documents. The operating temperature of the double-row bearing shall not exceed 70℃. 4.3.9 The bearing seat shall be ultrasonically inspected according to GB/T7233 and meet the requirements of level 2. 4.3.10 The joint seams of the retaining rings of the front disc and hub of the impact wheel shall be ultrasonically inspected and meet the requirements of level Ⅱ·B in GB/T11345. 4.4 Safety requirements
4.4.1 The noise value of the fan when running with no load shall not exceed 85dB(A). 4.4.2 When the fan is running with no load, the vertical and horizontal amplitudes measured on the bearing seat shall not be greater than 0.050mm (single bee value). 5 Test methods
5.1 Each product shall be assembled and tested with no load at the manufacturer before leaving the factory. 5.2 T-turn test, each rotating part shall rotate flexibly and reliably without jamming. JB/T7890—1999
5.3 The main parts of each product are inspected by universal measuring tools, and the taper measurement is inspected by a special taper measuring instrument. 5.4 The noise is measured at 1.5m outside the machine according to the provisions of GB/T3768. 5.5 The horizontal and vertical amplitudes are measured on the bearing seat by a vibration meter, which shall comply with the provisions of 4.4.2. 5.6 Each fan mill shall be tested at no-load at rated speed, and the time must last for 6~8h and comply with the provisions of 4.2.12. 6 Inspection rules
6.1 Sampling method
6.1.1 The sample for finished product inspection shall be taken from the qualified products in storage. 6.1.2 Samples in the production process shall be taken from the qualified parts in the warehouse or disassembled by the whole machine (the parts of large products can be based on the process inspection record of the current product).
6.2 Inspection classification
Inspection is divided into factory inspection and type inspection.
6.2.1 Factory inspection
Each product must undergo factory inspection, and its content and requirements shall comply with the provisions of 4.2.3-4.2.9, 4.4.1 and 4.4.2. At the same time, the following inspections shall be carried out:
a) The fan mill shall be inspected for appearance quality, relevant dimensions and no-load test in the manufacturer: b) The no-load test shall be carried out in accordance with the provisions of the design technical documents, and the coal mill shall run continuously for 6~8h, but it shall be allowed to end when the bearing temperature remains constant in the last 2h.
6.2.2 Type inspection
Type inspection shall be carried out in any of the following situations: a) Trial determination and identification of new products under development or when the product is transferred to another factory for production; b) After formal production, if there are major changes in the structure, design, process or material of the product; c) When the national quality supervision agency proposes type inspection requirements. The content of type inspection shall include all the requirements of this standard. 7. Marking, packaging, transportation and storage
7.1 The product shall be marked with a product label in a conspicuous position. Its type and size shall comply with the provisions of GB/T13306, and indicate the following contents: a) product name and model
b) main technical parameters;
c) factory number;
d) manufacturing date;
e) manufacturer's name.
7.2 Product packaging shall comply with the provisions of GB/T13384, and the packaging storage and transportation graphic signs shall comply with the provisions of GB191. 7.3 Products shall be packaged according to the packing list and shall meet the requirements of water and land transportation. 7.4 Products shall be stored in a well-ventilated room or under a shed during the storage period, and electrical equipment shall be protected from moisture. Regular maintenance shall be carried out during storage to prevent parts from rusting and damage.3 The heat treatment hardness of the fan grinding spindle should reach 228-269HB, and the material mechanical properties test is required to meet the requirements of Table 3 Table 3 Mechanical properties of spindle materials
Yield strength
≥375
Tensile strength
Elongation
4.3.4 The wall thickness of the connecting beam should be checked, and its allowable deviation should meet the requirements of the design technical documents. Impact value
4.3.5 The impact wheel should be subjected to static balance test before and after the impact plate is assembled, and its static balance quality should meet the requirements of G6.3 in GB/T9239.
4.3.6 The cone tolerance of the impact wheel's taper hole and the spindle's taper section shall be implemented in accordance with the provisions of GB/T11334, and the matching tolerance shall be implemented in accordance with GB/T12360. The contact rate between the impact wheel's taper hole and the spindle's taper section shall not be less than 80%. 4.3.7 The clearance between the impact wheel and the housing on both sides shall meet the requirements of the technical documents. 4.3.8 The double-row bearing in the bearing box shall comply with the provisions of the technical documents. The operating temperature of the double-row bearing shall not exceed 70℃. 4.3.9 The bearing seat shall be ultrasonically inspected according to GB/T7233 and meet the requirements of level 2. 4.3.10 The joint seams of the retaining rings of the front disc and hub of the impact wheel shall be ultrasonically inspected and meet the requirements of level Ⅱ·B in GB/T11345. 4.4 Safety requirements
4.4.1 The noise value of the fan when running with no load shall not exceed 85dB(A). 4.4.2 When the fan is running with no load, the vertical and horizontal amplitudes measured on the bearing seat shall not be greater than 0.050mm (single bee value). 5 Test methods
5.1 Each product shall be assembled and tested with no load at the manufacturer before leaving the factory. 5.2 T-turn test, each rotating part shall rotate flexibly and reliably without jamming. JB/T7890—1999
5.3 The main parts of each product are inspected by universal measuring tools, and the taper measurement is inspected by a special taper measuring instrument. 5.4 The noise is measured at 1.5m outside the machine according to the provisions of GB/T3768. 5.5 The horizontal and vertical amplitudes are measured on the bearing seat by a vibration meter, which shall comply with the provisions of 4.4.2. 5.6 Each fan mill shall be tested at no-load at rated speed, and the time must last for 6~8h and comply with the provisions of 4.2.12. 6 Inspection rules
6.1 Sampling method
6.1.1 The sample for finished product inspection shall be taken from the qualified products in storage. 6.1.2 Samples in the production process shall be taken from the qualified parts in the warehouse or disassembled by the whole machine (the parts of large products can be based on the process inspection record of the current product).
6.2 Inspection classification
Inspection is divided into factory inspection and type inspection.
6.2.1 Factory inspection
Each product must undergo factory inspection, and its content and requirements shall comply with the provisions of 4.2.3-4.2.9, 4.4.1 and 4.4.2. At the same time, the following inspections shall be carried out:
a) The fan mill shall be inspected for appearance quality, relevant dimensions and no-load test in the manufacturer: b) The no-load test shall be carried out in accordance with the provisions of the design technical documents, and the coal mill shall run continuously for 6~8h, but it shall be allowed to end when the bearing temperature remains constant in the last 2h.
6.2.2 Type inspection
Type inspection shall be carried out in any of the following situations: a) Trial determination and identification of new products under development or when the product is transferred to another factory for production; b) After formal production, if there are major changes in the structure, design, process or material of the product; c) When the national quality supervision agency proposes type inspection requirements. The content of type inspection shall include all the requirements of this standard. 7. Marking, packaging, transportation and storage
7.1 The product shall be marked with a product label in a conspicuous position. Its type and size shall comply with the provisions of GB/T13306, and indicate the following contents: a) product name and model
b) main technical parameters;
c) factory number;
d) manufacturing date;
e) manufacturer's name.
7.2 Product packaging shall comply with the provisions of GB/T13384, and the packaging storage and transportation graphic signs shall comply with the provisions of GB191. 7.3 Products shall be packaged according to the packing list and shall meet the requirements of water and land transportation. 7.4 Products shall be stored in a well-ventilated room or under a shed during the storage period, and electrical equipment shall be protected from moisture. Regular maintenance shall be carried out during storage to prevent parts from rusting and damage.
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