JB/T 5904.2-1999 Technical requirements for manufacturing low-pressure turbine expanders
Some standard content:
ICS 71.100.20
J76
JB
Mechanical Industry Standard of the People's Republic of China
JB/T5904.2-1999
Manufacturing specifications for low pressure turbine expander
turboexpanders1999-07-12 Issued
National Machinery Industry Bureau
Issued
2000-01-01 Implementation
JB/T5904.2—1999
Foreword
This standard is a revision of JB/Z343-89 "Technical Requirements for Manufacturing Low-pressure Turbine Expanders". The main technical content changes are as follows:
The material grades in Tables 1 and 2 are modified according to the current standards; the chemical composition of the nozzle ring and bearing housing materials ZG12Cr18Nill and ZG25CrMo4 in Table 1 is specified, and LD is added to the column of recommended materials for the seal body: "The lubricating oil cavity is coated with S54-1 white polyurethane resistant paint" in -5.4 is changed to "anti-rust and anti-corrosion treatment": The charts in Appendix A are modified. This standard replaces JB/Z343-89 from the date of implementation. Appendix A of this standard is the standard appendix.
This standard is proposed and managed by the Technical Committee for Standardization of Gas Separation and Liquefaction Equipment. The drafting unit of this standard is Hangzhou Oxygen Generator Group Co., Ltd. The main drafters of this standard are Cai Guocheng and Shi Jianzhong. This standard was first issued in January 1989.
Machinery Industry Standard of the People's Republic of China
Manufacturing specifications for low pressure turboexpanders
Manufacturing specifications for low pressure turboexpanders1Scope
This standard specifies the materials, manufacturing technical requirements and assembly requirements of low pressure turboexpanders. JB/T5904.2—1999
Replaces JB/Z343—89
This standard applies to centripetal turboexpanders (hereinafter referred to as expanders) that obtain cooling capacity by expansion work during the separation and liquefaction of air and natural gas and whose inlet pressure is not more than 1.6MPa (absolute pressure). This standard does not apply to expanders with gas-lubricated bearings. 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. GB713—1997
GB/T 699—1988
GB/T 1031—1995
GB/T 1095—1979
GB/T 1096—1979
GB/T 1173-1995
GB/T 1174—1992
GB/T 1176--1987
GB/T 1184—1996
GB/T 1220—1992
GB/T 1801—1979
GB/T 1804—1992
GB/T2100—1980
GB/T 3077—1988
GB/T 3190—1996
GB/T 4423—1992
GB/T 5612—1985
GB/T 6414—1986
GB/T 9438-1988
GB/T 100951988
GB/T 11334—1989
Steel plates for boilers
Technical conditions for high-quality carbon structural steel
Surface roughness parameters and their values
Cross-section dimensions of flat keys and keyways
Type dimensions of common flat keys
Casting aluminum alloys
Casting bearing alloys
Technical conditions for casting copper alloys
Shape and position tolerances without tolerance values
Stainless steel bars
Tolerances and fit dimensions up to 500 mm Tolerance zones and fits for holes and shafts General tolerances Without tolerances for linear dimensions| |tt||Technical conditions for stainless acid-resistant steel castings
Technical conditions for alloy structural steel
Chemical composition of wrought aluminum and aluminum alloys
Drawing of copper and copper alloys
Method for indicating grades of cast iron
Dimensional tolerances of castings
Technical conditions for aluminum alloy castings
Precision of involute cylindrical gears
Circular dimension tolerance
Approved by the State Bureau of Machinery Industry on July 12, 1999 and implemented on January 1, 2000
GB/T138081992
GB/T 13819—1992
GB/T 157531995
JB/T2934—1993
JB/T7946.3—1999
3Material requirements
3.1
JB/T 5904.2—1999
Steel and copper alloy extruded rods
Copper alloy castings
Precision of arc cylindrical gears
Carbon materials and products for machinery
Metallography of cast aluminum alloy cast aluminum alloy pinhole expander The recommended material grades for the main parts are shown in Table 1. The use of special materials shall comply with the requirements of the drawings and technical documents approved according to the prescribed procedures.
Table 1
Parts name
Volute
Impeller
Main shaft
Love ring
Bearing box
Reduction box
Fan volute
Shaft
Bearing
2
Shaft seal
Shaft village
Seal
Name
Cast aluminum alloy
Aluminum alloy plate
Cast steel alloy
Forged aluminum
Cast aluminum alloy
Alloy structural steel
Cast steel
Stainless steel Acid-resistant steel
Brass
Cast copper alloy
Gray cast steel
Gray cast iron
Boiler steel plate
High-quality carbon steel
Cast bearing alloy
Yellow steel
Cast copper alloy
Recommended material
Grade or code
ZL101:ZL102;ZL104
LF2;LF21
ZCuZn16Si4
LD;LD
ZL.201;ZL402
40Cr; 40CrNi; 12CrNi3
ZG12Cr18Ni1t
0Cr18Ni9:2Cr13
H62
ZCuSn10Pb1; ZCuZn35A12Mn2FelHT200;HT250
ZG25CrMo4
HT200HT250
20G
20
ZChSnSb11-6
H62
ZCuZn35AI2Mn2Fel:ZCuSn10Pb1
Standard
No.
GB/T 1173± GB/T 9438
GB/T 3190
GB/T1176
GB/T 3190
GB/T 1173
GB/T 3077
Chemical composition:
C≤0.15; Si1.0;
Mn≤2.0;P≤0.045;
Cr: 16.2~18.5; Ni: 10.0~12.0;S≤0.030;Mo≤0.75
GB/T 1220; GB/T 2100
GB/T 4423; GB/T 13808
GB/T1176
GB/T1176
Chemical composition:
C: 0.220.29; Si; 0.3~0.5;
Mn: 0.50.8; Cr: 0.8~1.2
Mo; 0.20.3; P≤0.035;
S≤0.035
GB/T5612
GB713
GB/T699
GB/T 1174
GB/T 4423; GB/T 13808||tt| |GB/T1176
Part name
Seal
Seal
Sealer
Sealer body
Sealer lining
Xingshaft gear
Planetary gear
Name
Stainless acid-resistant steel
High quality carbon steel
Casted copper alloy
Forged aluminum
Bearing alloy
Casting bearing alloy
Graphite
Alloy structural steel
High quality carbon steel
Alloy structure
JB/T5904.2-1999
Table 1 (End)
Recommended materials
Grade or code
OCr18Ni9;1Cr13
35||tt| |ZCuZn35A12Mn2Fel
LD
5 lead-based alloy
ZChSn11-8
M252H electrochemical graphite
20CrMnTi: 40Cr; 40CrNi||tt| 45
25Cr2MoVA; 35CrMoA
The heat treatment and surface treatment of the main parts should comply with the provisions of Table 2. 3.2
Table 2
Part name
volute
impeller
main shaft
nozzle ring
bearing box|| tt||Reduction box
Fan volute
Material grade
ZL101, ZL102, ZL104
LD
DL
ZL402|| tt||ZL201
12CrNi3
40Cr
40CrNi
ZG12Cr18Ni11
2Cr13
ZG25CrMo4, HT200
HT250|| tt||HT200, HT250
20G
artificial aging
standard
accurate
GB/T1220
GB/T 699|| tt||GB/T1176
GB/T3190
Chemical composition:
No.
Sn4.5%5.5%: the rest is Pb
GB/ T 1174
JB/T2934
GB/T 3077
GB/T 699
GB/T 3077
Handling requirements
Fire And artificial aging, the mechanical properties after treatment are in accordance with the design drawing requirements; the surface of the flow channel is anodized; the hardness is greater than 300HV, the depth is greater than 0.04mm aging treatment, sand casting, the mechanical properties after treatment are in accordance with the design drawing requirements; the flow channel surface is anodized Treatment, the hardness is greater than 350HV, the depth is greater than 0.04mm, and the sand mold is to be checked. The mechanical properties after treatment are in accordance with the design drawing requirements: the surface of the flow channel is anodized, the hardness is greater than 220HV, the depth is greater than 0.04mm, and the overall quality is measured, 24- 32HRC
The bearing journal and thrust surface are carburized, the depth is 1~1.5mm, the hardness is 58-62HRC overall tempering, 24~32HRC;
The bearing journal and thrust surface are floated Fire treatment, hardness 48-52HRC Fire treatment, 150~190HB
Ammoniation treatment on the surface of the sander
Aging treatment
Aging treatment
Stress relief treatment|| tt||Part name
Involute
Step
Wheel
Parallel axis gear
Involute
Row base gear|| tt||Western Arc Gear
4 Manufacturing Technical Requirements
4.1 Balance
Material Grade
45, 40Cr, 40CrNi
25Cr2MoVA
35CrMoA
40Cr, 40CrNi, 20CrMnT
45
JB/T5904.2-1999
Table 2 (End)
According to the design drawings|| tt||Quenching and tempering treatment, 25-30HRC
Tooth surface oxidation treatment
Quenching and tempering treatment, 270-300HB
Quenching and tempering treatment, 240~270HB
It is required
that the rotor of the expander and the gear shaft of the reduction box should be dynamically balanced and corrected. The dynamic balance accuracy of the rotor with a speed higher than 3100r/min is not lower than the G1 level in Appendix A (standard appendix), and the dynamic balance accuracy of the rotor with a speed lower than or equal to 3t00r/min is not lower than the G2.5 level in Appendix A. Provisions.
4.2 Running clearance
The running clearance between rotating parts and stationary parts is manufactured according to the requirements of the drawing. 4.3 Impeller
4.3.1 The impeller should be firmly fixed to prevent circumferential and axial movement when rotating in the specified direction. 4.3.2 The impeller should be subjected to an overspeed test at 120% of the design speed. After reaching the specified speed for 1 minute, there should be no defects such as cracks, and the relative linear deformation rate should not be greater than 0.025%.
4.3.3 For precision casting impellers, the blade thickness tolerance is ±10% of the blade thickness, and the angle tolerance of two adjacent blades is ±10°; after the casting is processed, a macroscopic low-magnification inspection of the back side is carried out. The holes should not be lower than level 3 in JB/T7946.3, and castings are not allowed to have defects such as cracks, looseness, cold shuts, and pores.
4.4 Axis
4.4.1 The main shaft and gear should retain the center hole. 4.4.2 The main shaft and gear shaft shall undergo non-destructive testing. The specific requirements shall be as specified in the drawings and technical documents. 4.5 Bearings
4.5.1 The temperature and temperature rise of the sliding bearing shall meet the provisions of the drawings and technical documents. The system should be equipped with a filter that can remove mechanical debris with a particle size greater than 5 μm in the lubricating oil.
4.5.2 The bushing and bushing body of the sliding bearing must fit together. 4.5.3 Use the coloring method to check that the assembled radial bearing and the sample shaft contact points are evenly connected, and the two thrust surfaces of the thrust bearing use the coloring method to check that the contact is even throughout the entire circumference.
4.6 Gears
Gears shall undergo non-destructive testing, and the specific requirements shall be as specified in the drawings and technical documents. 4.7 Check the strength and tightness of static pressure components. 4.7.1 The pot shell and fan volute should be subjected to a hydraulic test. The test pressure is 1.5 times the design pressure and not less than 0.2MPa (gauge pressure) 4
JB/T5904.2-1999||tt ||The pressure holding time shall not be less than 15 minutes, and there shall be no leakage or sweating during the pressure test process. Then conduct the air pressure test. The test pressure is 1.1% of the design pressure. The pressure holding time shall not be less than 10 minutes. There shall be no leakage during the pressure test. 4.7.2 For horizontally split volutes, the flatness and contact surface of the split surface should meet the technical requirements specified in the drawing, and the cross section is allowed to be coated with low-temperature sealant.
4.7.3 The inner cavity of the bearing box and reduction box must not leak oil. 4.8 The surface roughness value R of the main parts of the main parts shall not be greater than that specified in Table 3. Table 3
Part name
Working wheel
Flower wheel
Nozzle ring
Main
Tooth
4.9 Tolerance and Match
Shaft
Shell
Wheel
Part part
The hole that matches the spindle
Both end surfaces perpendicular to the hole||tt ||Blade flow channel
Both sides of the keyway
The hole that matches the spindle
Blade flow channel
Both sides of the key cone
Peripheral blade flow channel
Fixed blade surface
Adjustable blade flow channel
Adjustable blade end face
The journal and sliding bearing cooperate with the working wheel, fan wheel and coupling journal
axial thrust surface
both sides of the keyway
positioning surface for installing the intermediate body
positioning hole for installing the inner diffuser
The fitting surface for installing the nozzle ring cover plate
Involute tooth surface
Round strong tooth surface
No chain surfaces that match the shaft
Both sides of the chain||tt ||4.9.1 The tolerances and fits of the joint parts of the main parts should comply with the provisions of Table 4. Surface roughness value R
(GB/T1031)
0.8
1.6
6.3
0.8
6.3
3.2
1.6
0.8
0.4
6.3
1.6
3.2
0.8
1.6| | tt | Blade height
Main journal, gear journal
Sliding bearing positioning outer
Need to cooperate with positioning hole
Gear and gear shaft
Shaft precision and Key
Shaft installation and key
Integral bearing
Sub-bearing
JB/T5904.2—1999
Table 4
Tolerance Works with
H6/h5 or H6/g5
Dimension 1:10
JS12
JS10
h6
k6||tt ||H7/r6
N9/h9
H9/h9
Js9/h9
D10/h9
The machined surface of the part without any tolerances Dimensional tolerances are stipulated in GB/T1804, and the medium grade is selected, 4.9.2:
standard number
GB/T1801
contact area is greater than 70%
GB/T1801| |tt||GB/T 1095
GB/T1096
GB/T 1095
GB/T 1096
4.9.3 Dimensional deviation of castings (except working wheel, Outside the wind turbine wheel) shall comply with the regulations of GB/T6414. The dimensional deviation of copper castings should comply with the regulations of GB/T13819.
The surface shape and position tolerance of main parts should comply with the provisions of Table 5. 4.10
Table 5
Part name
Wolf
Shell
Sliding bearing
Bearing box, reduction box
6
Name of location and tolerance
The coaxiality of the axis of each positioning hole of the internal diffuser or diffuser to the axis of the positioning shaft hole of the intermediate body:
Positioning of the intermediate body The hole diameter is less than 350mm. The installation intermediate body positioning hole diameter is greater than or equal to 350mm. The verticality of the bearing positioning end facing the bearing hole axis. The verticality of the bearing thrust facing the bearing hole axis. The verticality of the bearing positioning outer circle to the bearing hole axis. Overall coaxiality. Bearing positioning: The alignment of each air seal to the axis of the bearing tie, the coaxiality of the positioning hole of the oil seal cover to the axis of the bearing positioning hole, the perpendicularity of each air seal and the positioning end of the oil seal end cover facing the axis of the bearing positioning hole, and the installation center The coaxiality of the positioning resistance column of the body or volute facing the axis of the bearing positioning hole. The verticality of the positioning end of the intermediate body facing the axis of the positioning cylinder cylinder. The coaxiality of the positioning cylinder of the fan end cover facing the axis of the bearing positioning hole. The verticality of the axial positioning of the bearing facing the axis of the bearing positioning hole. The verticality of the positioning end of the installed fan end cover facing the axis of the positioning fixed cylinder. Tolerance grade and standard number
Level 5.GB/T1184| |tt||Level 6.GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184
Level 5, GB/T1184
Level 4 , GB/T1184
Level 5, GB/T1184
Level 6, GB/T1184
Level 5, GB/T1184
Level 6, GBT1184||tt| |Level 6, GB/T1184
Level 6, GB/T1184
Level 7, GB/T 1184
Part name
Bearing box, reduction box||tt ||worm
1 making wheel
fan wheel
nozzle ring
main shaft, gear shaft
teeth
wheel||tt| |JB/T5904.2—1999
Table 5 (End)
Part and tolerance name
Axis center distance deviation of the two shaft holes of the reduction box
Zhekai Line Gear :
Parallel shaft gear
Planetary gear
Arc gear
Axis parallelism error of the two shaft holes of the reduction box
Involute wheels:| | tt | Verticality of the positioning axis
The circular runout of the impeller inlet outer circle and the blade profile busbar to the shaft hole axis and the circular runout of the closed impeller sealing plate to the shaft filling axis The two ends of the impeller face the shaft hole axis Symmetry of the verticality two keys relative to the axis of the shaft hole
The blades are evenly distributed along the circumference, and the angular deviation between two adjacent blades: adjustable feed nozzle ring
fixed nozzle ring||tt| |Blade installation angle deviation:
Adjustable nozzle ring
Fixed nozzle ring
The verticality of the nozzle ring cover plate positioning outer or inner hole to both sides: measurable nozzle ring
fixed nozzle ring
parallelism of both sides of the nozzle ring cover:
adjustable nozzle ring
fixed nozzle ring||tt ||The coaxiality of each journal to the axis of the sliding bearing journal, the perpendicularity of the thrust bearing end face to the axis
The symmetry of the keyway to the axis
The cylindricity of the radial bearing journal|| tt||Solidity of radial bearing journal
Gear accuracy
Involute gear:
Parallel axis gear
Planetary gear
Arc gear
Note: The tooth thickness limit deviation of involute gears is based on the product design regulations of speed and reverse power. Tolerance grade and standard number
Level 6, GB/T10095
Level 5, GB/T10095
Level 6, GB/T15753
Level 6, GB/T10095| |tt||Level 5, GB/T10095
Level 6, GB/T15753
Level 6.GB/T 1184
Level 7, GB/T1184
5 Level, GB/T 1184
Level 9, GB/T1184
Level 8, GB/T11334
Level 7, GB/T11334
Level 8, GB/T11334
Level 7, GB/T11334
Level 6, GB/T 1184
Level 5, GB/T1184
Level 5.GB/T1184
Level 4, GB/T1184
Level 4, GB/T1184
Level 9. GB/T1184
Level 7, GB/T1184
Level 6, GB/T10095
5 micro, GB/T10095
Level 6, GB/T15753
7
2—1999
Table 4
Tolerances and fits
H6/h5 or H6/g5
Dimension 1: 10
JS12
JS10
h6
k6
H7/r6
N9/h9
H9/h9
Js9/h9
D10/h9
The dimensional tolerance of the machined surface of the parts without tolerances is specified in GB/T1804, and the medium level is selected, 4.9.2:
Standard numberbzxZ.net
GB/T1801||tt ||Contact area greater than 70%
GB/T1801
GB/T 1095
GB/T1096
GB/T 1095
GB/T 1096
4.9.3 The dimensional deviation of castings (except working wheels and fan wheels) shall comply with the regulations of GB/T6414. The dimensional deviation of copper castings should comply with the regulations of GB/T13819.
The surface shape and position tolerance of main parts should comply with the provisions of Table 5. 4.10
Table 5
Part name
Wolf
Shell
Sliding bearing
Bearing box, reduction box
6
Name of location and tolerance
The coaxiality of the axis of each positioning hole of the internal diffuser or diffuser to the axis of the positioning shaft hole of the intermediate body:
Positioning of the intermediate body The hole diameter is less than 350mm. The installation intermediate body positioning hole diameter is greater than or equal to 350mm. The verticality of the bearing positioning end facing the bearing hole axis. The verticality of the bearing thrust facing the bearing hole axis. The verticality of the bearing positioning outer circle to the bearing hole axis. Overall coaxiality. Bearing positioning: The alignment of each air seal to the axis of the bearing tie, the coaxiality of the positioning hole of the oil seal cover to the axis of the bearing positioning hole, the perpendicularity of each air seal and the positioning end of the oil seal end cover facing the axis of the bearing positioning hole, and the installation center The coaxiality of the positioning resistance column of the body or volute facing the axis of the bearing positioning hole. The verticality of the positioning end of the intermediate body facing the axis of the positioning cylinder cylinder. The coaxiality of the positioning cylinder of the fan end cover facing the axis of the bearing positioning hole. The verticality of the axial positioning of the bearing facing the axis of the bearing positioning hole. The verticality of the positioning end of the installed fan end cover facing the axis of the positioning cylinder. Tolerance grade and standard number
Level 5.GB/T1184| |tt||Level 6.GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184
Level 5, GB/T1184
Level 4 , GB/T1184
Level 5, GB/T1184
Level 6, GB/T1184
Level 5, GB/T1184
Level 6, GBT1184||tt| |Level 6, GB/T1184
Level 6, GB/T1184
Level 7, GB/T 1184
Part name
Bearing box, reduction box||tt ||worm
1 making wheel
fan wheel
nozzle ring
main shaft, gear shaft
teeth
wheel||tt| |JB/T5904.2—1999
Table 5 (End)
Part and tolerance name
Axis center distance deviation of the two shaft holes of the reduction box
Zhekai Line Gear :
Parallel shaft gear
Planetary gear
Arc gear
Axis parallelism error of the two shaft holes of the reduction box
Involute wheels:| | tt | Verticality of the positioning axis
The circular runout of the impeller inlet outer circle and the blade profile busbar to the shaft hole axis and the circular runout of the closed impeller sealing plate to the shaft filling axis The two ends of the impeller face the shaft hole axis Symmetry of the verticality two keys relative to the axis of the shaft hole
The blades are evenly distributed along the circumference, and the angular deviation between two adjacent blades: adjustable feed nozzle ring
fixed nozzle ring||tt| |Blade installation angle deviation:
Adjustable nozzle ring
Fixed nozzle ring
The verticality of the nozzle ring cover plate positioning outer or inner hole to both sides: measurable nozzle ring
fixed nozzle ring
parallelism of both sides of the nozzle ring cover:
adjustable nozzle ring
fixed nozzle ring||tt ||The coaxiality of each journal to the axis of the sliding bearing journal, the perpendicularity of the thrust bearing end face to the axis
The symmetry of the keyway to the axis
The cylindricity of the radial bearing journal|| tt||Solidity of radial bearing journal
Gear accuracy
Involute gear:
Parallel axis gear
Planetary gear
Arc gear
Note: The tooth thickness limit deviation of involute gears is based on the product design regulations of speed and reverse power. Tolerance grade and standard number
Level 6, GB/T10095
Level 5, GB/T10095
Level 6, GB/T15753
Level 6, GB/T10095| |tt||Level 5, GB/T10095
Level 6, GB/T15753
Level 6.GB/T 1184
Level 7, GB/T1184
5 Level, GB/T 1184
Level 9, GB/T1184
Level 8, GB/T11334
Level 7, GB/T11334
Level 8, GB/T11334
Level 7, GB/T11334
Level 6, GB/T 1184
Level 5, GB/T1184
Level 5.GB/T1184
Level 4, GB/T1184
Level 4, GB/T1184
Level 9. GB/T1184
Level 7, GB/T1184
Level 6, GB/T10095
5 micro, GB/T10095
Level 6, GB/T15753
7
2—1999
Table 4
Tolerances and fits
H6/h5 or H6/g5
Dimension 1: 10
JS12
JS10
h6
k6
H7/r6
N9/h9
H9/h9
Js9/h9
D10/h9
The dimensional tolerance of the machined surface of the parts without tolerances is specified in GB/T1804, and the medium level is selected, 4.9.2:
Standard number
GB/T1801||tt ||Contact area greater than 70%
GB/T1801
GB/T 1095
GB/T1096
GB/T 1095
GB/T 1096
4.9.3 The dimensional deviation of castings (except working wheels and fan wheels) shall comply with the regulations of GB/T6414. The dimensional deviation of copper castings should comply with the regulations of GB/T13819.
The surface shape and position tolerance of main parts should comply with the provisions of Table 5. 4.10
Table 5
Part name
Wolf
Shell
Sliding bearing
Bearing box, reduction box
6
Name of location and tolerance
The coaxiality of the axis of each positioning hole of the internal diffuser or diffuser to the axis of the positioning shaft hole of the intermediate body:
Positioning of the intermediate body The hole diameter is less than 350mm. The installation intermediate body positioning hole diameter is greater than or equal to 350mm. The verticality of the bearing positioning end facing the bearing hole axis. The verticality of the bearing thrust facing the bearing hole axis. The verticality of the bearing positioning outer circle to the bearing hole axis. Overall coaxiality. Bearing positioning: The alignment of each air seal to the axis of the bearing tie, the coaxiality of the positioning hole of the oil seal cover to the axis of the bearing positioning hole, the perpendicularity of each air seal and the positioning end of the oil seal end cover facing the axis of the bearing positioning hole, and the installation center The coaxiality of the positioning resistance column of the body or volute facing the axis of the bearing positioning hole. The verticality of the positioning end of the intermediate body facing the axis of the positioning cylinder cylinder. The coaxiality of the positioning cylinder of the fan end cover facing the axis of the bearing positioning hole. The verticality of the axial positioning of the bearing facing the axis of the bearing positioning hole. The verticality of the positioning end of the installed fan end cover facing the axis of the positioning fixed cylinder. Tolerance grade and standard number
Level 5.GB/T1184| |tt||Level 6.GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184
Level 5, GB/T1184
Level 4 , GB/T1184
Level 5, GB/T1184
Level 6, GB/T1184
Level 5, GB/T1184
Level 6, GBT1184||tt| |Level 6, GB/T1184
Level 6, GB/T1184
Level 7, GB/T 1184
Part name
Bearing box, reduction box||tt ||worm
1 making wheel
fan wheel
nozzle ring
main shaft, gear shaft
teeth
wheel||tt| |JB/T5904.2—1999
Table 5 (End)
Part and tolerance name
Axis center distance deviation of the two shaft holes of the reduction box
Zhekai Line Gear :
Parallel shaft gear
Planetary gear
Arc gear
Axis parallelism error of the two shaft holes of the reduction box
Involute wheels:| | tt | Verticality of the positioning axis
The circular runout of the impeller inlet outer circle and the blade profile busbar to the shaft hole axis and the circular runout of the closed impeller sealing plate to the shaft filling axis The two ends of the impeller face the shaft hole axis Symmetry of the verticality two keys relative to the axis of the shaft hole
The blades are evenly distributed along the circumference, and the angular deviation between two adjacent blades: adjustable feed nozzle ring
fixed nozzle ring||tt| |Blade installation angle deviation:
Adjustable nozzle ring
Fixed nozzle ring
The verticality of the nozzle ring cover plate positioning outer or inner hole to both sides: measurable nozzle ring
fixed nozzle ring
parallelism of both sides of the nozzle ring cover:
adjustable nozzle ring
fixed nozzle ring||tt ||The coaxiality of each journal to the axis of the sliding bearing journal, the perpendicularity of the thrust bearing end face to the axis
The symmetry of the keyway to the axis
The cylindricity of the radial bearing journal|| tt||Solidity of radial bearing journal
Gear accuracy
Involute gear:
Parallel axis gear
Planetary gear
Arc gear
Note: The tooth thickness limit deviation of involute gears is based on the product design regulations of speed and reverse power. Tolerance grade and standard number
Level 6, GB/T10095
Level 5, GB/T10095
Level 6, GB/T15753
Level 6, GB/T10095| |tt||Level 5, GB/T10095
Level 6, GB/T15753
Level 6.GB/T 1184
Level 7, GB/T1184
5 Level, GB/T 1184
Level 9, GB/T1184
Level 8, GB/T11334
Level 7, GB/T11334
Level 8, GB/T11334
Level 7, GB/T11334
Level 6, GB/T 1184
Level 5, GB/T1184
Level 5.GB/T1184
Level 4, GB/T1184
Level 4, GB/T1184
Level 9. GB/T1184
Level 7, GB/T1184
Level 6, GB/T10095
5 micro, GB/T10095
Level 6, GB/T15753
7
GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184||tt ||Level 5, GB/T1184
Level 6, GB/T1184
Level 5, GB/T1184
Level 6, GBT1184
Level 6, GB/T1184
Level 6, GB/T1184
Level 7, GB/T 1184
Part name
Bearing box, reduction box
Snail||tt| |1 making wheel
fan wheel
nozzle ring
main shaft, gear shaft
teeth
wheel
JB/T5904.2— 1999
Table 5 (End)
Position and tolerance name
Axis center distance deviation of the two shaft holes of the reduction box
Zhekai line gear:
Parallel Shaft gear
Planetary gear
Arc gear
Axis parallelism error of the two shaft holes of the reduction box
Involute wheels:
Huaxing shaft Gear
Planetary gear
Arc gear
The verticality of each positioning hole end of the installation intermediate body, nozzle ring cover plate, and inner diffuser facing the positioning axis of the installation intermediate body|| tt||The circular runout of the impeller inlet outer circle and the blade profile busbar relative to the axis of the shaft hole and the circular runout of the closed impeller sealing plate external to the shaft filling axis, the verticality of both ends of the impeller facing the axis of the shaft hole, the two keys relative to the shaft hole Symmetry of the axis
The blades are evenly distributed along the circumference, and the angle deviation between two adjacent blades: Adjustable feed nozzle ring
Fixed nozzle ring
Blade installation angle angle deviation:
Adjustable nozzle ring
Fixed nozzle ring
The verticality of the nozzle ring cover plate positioning outer or inner hole to both sides: Measurable nozzle ring||tt| |Fixed nozzle ring
Parallelism of both sides of the nozzle ring cover plate:
Adjustable nozzle ring
Fixed puff ring
Each journal pair slides Coaxiality of the bearing journal axis Verticality of the thrust bearing end face to the axis
Symmetry of the keyway to the axis
Cylindricity of the radial bearing journal
Radial bearing shaft Neck solidity
Gear accuracy
Involute gear:
Parallel axis gear
Planetary gear
Arc gear
Note: The tooth thickness limit deviation of involute gears is based on the product design regulations of speed and reverse power transmission. Tolerance grade and standard number
Level 6, GB/T10095
Level 5, GB/T10095
Level 6, GB/T15753
Level 6, GB/T10095| |tt||Level 5, GB/T10095
Level 6, GB/T15753
Level 6.GB/T 1184
Level 7, GB/T1184
5 Level, GB/T 1184
Level 9, GB/T1184
Level 8, GB/T11334
Level 7, GB/T11334
Level 8, GB/T11334
Level 7, GB/T11334
Level 6, GB/T 1184
Level 5, GB/T1184
Level 5.GB/T1184
Level 4, GB/T1184
Level 4, GB/T1184
Level 9. GB/T1184
Level 7, GB/T1184
Level 6, GB/T10095
5 micro, GB/T10095
Level 6, GB/T15753
7
GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184
Level 5, GB/T1184
Level 4, GB/T1184||tt ||Level 5, GB/T1184
Level 6, GB/T1184
Level 5, GB/T1184
Level 6, GBT1184
Level 6, GB/T1184
Level 6, GB/T1184
Level 7, GB/T 1184
Part name
Bearing box, reduction box
Snail||tt| |1 making wheel
fan wheel
nozzle ring
main shaft, gear shaft
teeth
wheel
JB/T5904.2— 1999
Table 5 (End)
Position and tolerance name
Axis center distance deviation of the two shaft holes of the reduction box
Zhekai line gear:
Parallel Shaft gear
Planetary gear
Arc gear
Axis parallelism error of the two shaft holes of the reduction box
Involute wheels:
Huaxing shaft Gear
Planetary gear
Arc gear
The verticality of each positioning hole end of the installation intermediate body, nozzle ring cover plate, and inner diffuser facing the positioning axis of the installation intermediate body|| tt||The circular runout of the impeller inlet outer circle and the blade profile busbar relative to the axis of the shaft hole and the circular runout of the closed impeller sealing plate external to the shaft filling axis, the verticality of both ends of the impeller facing the axis of the shaft hole, the two keys relative to the shaft hole Symmetry of the axis
The blades are evenly distributed along the circumference, and the angle deviation between two adjacent blades: Adjustable feed nozzle ring
Fixed nozzle ring
Blade installation angle angle deviation:
Adjustable nozzle ring
Fixed nozzle ring
The verticality of the nozzle ring cover plate positioning outer or inner hole to both sides: Measurable nozzle ring||tt| |Fixed nozzle ring
Parallelism of both sides of the nozzle ring cover plate:
Adjustable nozzle ring
Fixed puff ring
Each journal pair slides Coaxiality of the bearing journal axis Verticality of the thrust bearing end face to the axis
Symmetry of the keyway to the axis
Cylindricity of the radial bearing journal
Radial bearing shaft Neck solidity
Gear accuracy
Involute gear:
Parallel axis gear
Planetary gear
Arc gear
Note: The tooth thickness limit deviation of involute gears is based on the product design regulations of speed and reverse power transmission. Tolerance grade and standard number
Level 6, GB/T10095
Level 5, GB/T10095
Level 6, GB/T15753
Level 6, GB/T10095| |tt||Level 5, GB/T10095
Level 6, GB/T15753
Level 6.GB/T 1184
Level 7, GB/T1184
5 Level, GB/T 1184
Level 9, GB/T1184
Level 8, GB/T11334
Level 7, GB/T11334
Level 8, GB/T11334
Level 7, GB/T11334
Level 6, GB/T 1184
Level 5, GB/T1184
Level 5.GB/T1184
Level 4, GB/T1184
Level 4, GB/T1184
Level 9. GB/T1184
Level 7, GB/T1184
Level 6, GB/T10095
5 micro, GB/T10095
Level 6, GB/T15753
7
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