JB/T 4334-1992 Technical conditions for static pressure air bearing turbine expander
Some standard content:
J76
JB
Machinery Industry Standard of the People's Republic of China
JB/T4334—92
Static pressure air bearing turbine expander
Technical conditions|| tt||Released on 1992-07-20
Implemented by the Ministry of Mechanical and Electronics Industry of the People's Republic of China on 1993-01-01
Released
Machinery Industry Standards of the People's Republic of China
static Compressed air bearing turbine expander
Technical conditions
1 Subject content and scope of application
JB/T4334—92
JB4334—86
This standard specifies the technical requirements, test methods, inspection rules, markings, packaging, transportation and storage of hydrostatic air bearing turbine expanders (radial turbine expanders).
This standard is applicable to static medical air bearing turbine expanders (hereinafter referred to as \). This standard does not apply to steam and liquid two-phase expanders. 2 Reference standards
GB191
GB1095
GB 1096
GB1184
GB1801
GB1804
GB2624||tt| |GB 2888
GB6414
GB-9438
GB/T11351
GB/T11351
GB/T 13306
GB/T13384
JB2121
ZBJ76015.1
3 Technical requirements
Packaging, storage and transportation pictorial mark
Cross-sectional dimensions of flat chain keys and keyways||tt| |Ordinary flat key type dimensions
The specified tolerances of shape and position tolerances without tolerances and the matching dimensions are up to 500mm. Hole, shaft tolerance zone and fitting tolerances and the limit tolerances of the matching dimensions without tolerances. Flow measurement throttling device|| tt||Fan and Roots blower noise measurement method Dimensional tolerance of castings
Technical conditions of aluminum alloy and other parts
Machining allowance of castings
Weight tolerance of rotating parts
Plate
General Technical Conditions for Mechanical and Electrical Product Packaging
Technical Conditions for Steel Alloy Castings
Technical Conditions for Small Air Separation Equipment
3.1 The accounting machine shall comply with the provisions of this standard and shall be operated in accordance with the The drawings and technical documents approved by the prescribed procedures are produced. 3.2 The medium entering the expander should be dry, clean, non-corrosive gas. 3.3 The air entering the bearing should be dry, clean, and non-corrosive. The system should be equipped with a filter that can remove mechanical debris particles in the air with a size of no more than 5um.
3.4 ??The manufacturer should determine the design flow and allowable working range of the expander product. The flow deviation under the design working conditions is ±10%. 3.5 The air consumption of the static pressure air bearing shall not be greater than the design point flow of the expander. The equivalent efficiency of the 5% 3.6 expander must meet the supporting requirements of the complete set of air separation equipment. The equivalent efficiency value under the design working conditions is not less than the provisions of Figure 1
Approved by the Ministry of Mechanical and Electronics Industry on 1992-07-201993- 01-01 Implementation
1
84%
100350200
Expander efficiency, %;
JB/T4334—92||tt| |71%
689
Basic status:
Medium: air
Inlet pressure, P1.5mP
Outlet pressure, 0.SMP||tt ||Inlet temperature, T=130K
300400 5no
700
1udo
Figure 1 Equi-end efficiency curve
gg—~Expander baseline state Density (0℃.101.325kPa), m/h15002000
3.7 The conversion between the standard flow rate under the design working condition of the expander and the standard flow rate under the reference state is carried out according to Equation (1). g-folp(zRTo/2R'T9)ys
(pe/pa)-(/k)/s
Formula electricity: P-
Density of working medium (0℃ , 101.325kPa).kg/m; p-density of air (0℃, 101.325kPa).kg/m; - compressibility coefficient of the working medium;
2°. compressibility coefficient of the air reference state; R-
R
To
To
Po
pe
K
K
9 .
-The gas band number of the working medium (Nm)/(kg-K) The gas constant of air.(Nm)/(kg·K)
The inlet degree of the expander design working condition, K;
The inlet humidity of the expander's base state, K; The inlet pressure of the expander's design working condition, MPa; The inlet pressure of the expansion machine's base state, MPa; The refining index of the working medium:
Air isotropic index;
The standard flow rate of the expander under design working conditions (0℃, 101.325kPa).kg/m*3.8 The noise value of the expansion unit in working condition is not greater than 85dB(A). 350ng: m/h | | tt | | 3000 | (1)
3.10 The dimensional tolerances, machining allowances and weight tolerances of castings (except working wheels and fan wheels) should comply with the provisions of GB6414.GB/T11350GB/T11351: The dimensional tolerances of copper alloy parts should Comply with the regulations of JB2121 3.11 The blade thickness deviation of the precision cast aluminum impeller is ±10%, and the angle deviation between two adjacent blades is ±10°. The back of the processed impeller should be inspected at low magnification, and its pinhole degree should not be lower than that specified in GB9438 No cracks, looseness, cold insulation, or pores are allowed on the Level 3 surface. 3.12 The spindle should undergo non-destructive testing and the requirements are specified in the drawing. 3.13 The spindle should retain the center hole.
3.14 The limit deviation of parts without tolerances in machining is in accordance with the provisions of GB1804. The hole is H14, the shaft is h14. The length is Js14.2
JB/T433492
3.15 The volute should be Carry out hydraulic pressure test and air tightness test. The hydraulic pressure test pressure is 1.5% of the design pressure and not less than 0.2MPa (gauge pressure). The pressure holding time is 15 minutes. No leakage is allowed. The pipe is opened: air tightness test, test pressure It is 1.05 times the design pressure, the pressure holding time is 10 minutes, and no leakage is allowed.
3.16 The rotor part of the expander must be dynamically balanced and corrected, and the unbalanced mass should be deweighted according to the technical requirements of the drawing; for the dynamic balance accuracy of the rigid rotor The grade is not greater than G2.5.
3.17 The floating pressure of the radial bearing and thrust bearing shall not be greater than 0.1MPa (gauge pressure) 3.18 The impeller shall be subjected to a slight overspeed test at 120% of the design speed for 3 minutes, and there shall be no defects such as cracks; it is allowed after the test The relative linear deformation rate is not greater than 0.025%.
3.19 The surface of the copper alloy casting is purified and coated with varnish. The outer surface of the 3.20 piece is cleaned and the primer should be applied after the rust is removed; the paint color is correct, bright and beautiful, and must not peel or fall off. Can play an anti-rust and decorative role.
3.21: Except for stainless steel and silver, fasteners are generally galvanized and oxidized, and the exposed parts of the standard bolts are neat and consistent. 3.22 After the whole machine test of the shadow expansion machine is completed, the air duct inlet and outlet must be sealed with straight plates: the inlet joints of bearing air, sealing air, etc. should be sealed at all times. 3.23 After the test, the cooling water in the machine and the surface condensation water should be cleared away. 3.24 The expander should operate reliably, adjust freely and stably, and the operation cycle should not be lower than the operation cycle of the supporting complete set of equipment. Its requirements are in accordance with the provisions of ZBJ76015.1.
3.25 The scope of supply of the machine is in accordance with the product technical documents Or the supply and demand contract stipulates that 3.26 the control, switching, heating and safety protection systems of the expander are all equipped with supporting equipment. 3.27 As long as the user abides by the transportation, storage, installation and use rules stipulated in the use and maintenance instructions of the expander, Under these conditions, if a product within 18 months from the date of shipment by the manufacturer and the use period does not exceed 12 months, if the product is damaged or cannot work properly due to poor manufacturing quality, the manufacturer shall replace it for the user free of charge. or repair (excluding wearing parts) 4 test methods
4.1 No-load mechanical performance test
4.1.1. Run for 1 hour at the design speed, and conduct three consecutive rest and stop tests. Each start must reach the design speed. 4.1.2 The super-compliance test runs for 3 minutes at 120% of the design speed. The operation is stable and reliable. 4.2 Noise
Noise measurement shall be carried out according to the provisions of GB2888
4.3 Flow
Flow measurement shall be carried out according to GB2624 4.4 Thermal performance test
4.4.1 Measuring instruments
4.4.1.1 The instruments and instruments used for the test have been certified by the measurement department and confirmed to be within the validity period. 4.4.1.2 Pressure, temperature, Measuring instruments such as rotation speed and flow rate are specified in Table 1. Table 1
Instrument name
Pressure gauge
Thermometer
tachometer
denometer
Accuracy requirement
0.4 Grade
0.1K (including secondary gauge only)
not less than 1%
according to GB2624 regulations
4.4.1.3 Select the pressure gauge according to the specified test pressure Range, the indicated pressure value should be between 1/2 and 2/3 of the full scale. The pressure measuring hole should be 3
perpendicular to the inner wall of the pipe, and the edge of the hole should be smooth and free of burrs. 4.4.2 Test steps
JB/T433492
4.4.2.1 The pressure vessel in the test device must comply with the relevant provisions of the (Pressure Vessel Safety Technical Supervision Regulations). The test medium should be clean, and each pipe of the test device must be The road should be clear and free of leakage. 4.4.2.2
4.4.2.3
The operation of the test device shall be in accordance with the relevant operating instructions. 4.4.2.4 The test shall be carried out under stable working conditions. 4.4.2.5| |tt|| Each set of data (pressure, temperature, speed) should be measured at the same time, and each test point should be measured continuously for 5 sets. The allowable fluctuation range of operating parameters during the test is as specified in Table 2||. tt||Parameter name
Main force
Temperature
Rotation speed
Absolute error of equal picking efficiency value
4.4.3 Test results
4.4.3.1 Expander efficiency
allowable fluctuation range
±2
±1
1
Take 5 sets of test values ??for calculation respectively , find the average sieve efficiency of the expander. The calculation formula is according to formula (2) = Ah/Ah,
where: AA...actual melt drop of the shadow expander, J/kg; Ah, expander Theoretical melt drop, J/kg | f(u).
n,-f(g)
where: - speed ratio;
Q shadow expansion machine flow rate
4.4.3.2. 2 The test points of the characteristic curve of the expansion machine shall not be less than 7 points, and the number of points distributed on both sides of the curve is required to be approximately equal. 4.5 Test report
The test report of the expansion machine shall be signed by the tester and the inspector. It shall be valid after being approved by the competent authority. 5 Inspection Rules
The expansion machine shall undergo factory inspection and type inspection
5.1.1 All parts shall be certified as qualified; purchased parts must be inspected. There is a certificate of conformity; outsourced parts must have a warranty certificate before assembly. 5.1.24
Each expansion machine must undergo a no-load mechanical performance test, and the test items and results shall be as specified in 4.1 for each expansion machine. It must be inspected by the manufacturer's inspection department and be accompanied by a product certificate before leaving the factory. 5.1.3
4
9
(2)
·(3 ) | | tt | | 4 | | tt | : Trial prototype identification of new products and old products transferred to factory production; a.
After normal production, due to major changes in structure, materials, and processes, product performance may be affected; b.
When the factory inspection results are significantly different from the last type inspection; c
d, when the national quality supervision agency proposes type inspection requirements: e
During normal production, the annual cumulative number of production units will be randomly inspected and inspected According to Table 3. Table 3
Cumulative number of annual production
Sampling number
≤50
5.2.2 Type inspection is carried out at the manufacturer or user site. 6 logo, packaging, transportation, storage
6.1 logo
50~100
2
>100
3
6.1.1 The shadow machine should have a product label fixed at a prominent position, and its size and technical requirements should comply with the provisions of GB/T13306 6.1.2 Label content:
Product model:
a.
Product name;
b.
Main performance parameters:
c.
Flow rate m'/h;
Inlet/outlet pressure.MPa (Table Pressure);
Inlet temperature, K;
Rotation speed, r/min;
Quality, kg-
Factory number:
d.|| tt||Manufacturing date;
e.
f.Manufacturer name
6.2 Packaging
6.2.1
6.2.2||tt| |6.2.3
6.2.4
a.
The packaging of the account expansion machine shall comply with the regulations of GB/T13384. Exposed and unpainted processing surfaces of product parts (except those made of copper, aluminum and stainless steel) must be treated with anti-rust treatment. The rain-proof, moisture-proof and shock-proof pictorial signs outside the expander packaging box should comply with the regulations of GB191. The following technical documents should be included with the expander when leaving the factory: Product Certificate of Conformity;
Product Instructions for Use; ||tt ||b.
c.
d.
e.
Flow chart;
Installation diagram:
Attachments List:
f． Packing list,
6.2.5 Random technical documents should be placed in a moisture-proof packaging bag and fixed in the designated position in the box. 6.3 Transportation and Storage
6.3.1 Transportation should avoid damage to the product. 6.3.2 | |tt | |tt||Cheng
A2
JB/T433492
Appendix A
Manufacturing Technical Requirements
(Supplementary Parts)
Expander The recommended material grades for the main parts are as specified in Table A1. Table A1
part name alcohol
volute
working wheel
and
fan wheel
Main
Hard environment
Bearing body
Bearing lining
Name
Yellow steel
Stainless acid resistant
Cast steel alloy
Aluminum alloy
Aluminum alloy
Super hard aluminum alloy
Aluminum alloy
Titanium alloy|| tt||Alloy structural pin
Stainless acid-resistant steel
Yellow
Stainless acid-resistant steel
Cast alloy steel
Stainless acid-resistant steel||tt ||Yellow Steel
Xu Steel Alloy
Run Graphite Alloy
Pushing Materials
Brand
H62
1Cr18Ni9||tt ||ZHSi80-3
ZL101.
LD5
LC4
ZL402
TC4
40Cr,
aCr13| |tt||H62
No.
ZL102.
40CrNi
1Cr18Ni9.
ZQSn10-1.
1Cr18Ni9.
H62
ZQPb30
ZL104
2Cr13
ZHFe59-1-1
2Cr13
J106, J164|| tt||The heat treatment and surface treatment of the main parts are as specified in Table A2. Table A2
Part name
volute
working wheel
and
fan wheel
main shaft
spray earning ring
6
Material grade
ZL101.ZL102
ZL104,ZHSi803
LC4
LD5
ZL402||tt ||3Cr13
40Cr
40CrNi
TC4
H62
Processing requirements
Artificial aging
Fire and artificial aging , the mechanical properties after treatment are as per the design drawing requirements, the surface of the flow channel is anodized, the hardness is >300HV. The retention is >0.02mm, aging treatment, sand molding, the mechanical properties after treatment, the design drawing requires the surface of the flow channel to be anodized, the hardness >300HV, retention >0.02mm, overall quenching and tempering 27±3HRC: bearing journal and thrust surface are ion hydrogenated, depth >0.05mm, hardness >850HV, nitride layer hardness is not greater than level 2, or chain hard chromium, The coating thickness is >0.05mm, the overall quality is 24~32HRC. The bearing shaft frequency and thrust surface are made to reduce heat, the hardness is 48~52HRC, the surface of the bearing journal and thrust surface is carburized, the depth is >0.3mm, and the hardness is >57HRC; Or nitriding treatment, depth>0.02mm, hardness>800HV
Hard chromium plating thickness 0.02~0.04mm
A3
JB/T433492
The main parts of the main parts The surface roughness value R is as specified in Table A3. Table A3
Part Name
Working Wheel
and
Flower Wheel
Sulfonate Ring
Yao
Spindle| | tt |
Two test passes of the key mold
Blade flow channel surface
Blade end face
Positioning surface for installing the intermediate body
Positioning surface for installing the inner diffuser
The end surface that fits the nozzle ring blade
The positioning hole for installing the nozzle ring
The neck that matches the working wheel and the fan wheel
Bearing journal|| tt||Thrust surface
Both sides of the key pig
Bearing hole
Thrust surface
Positioning end surface
The tolerances of the joint parts of the main parts are in accordance with the provisions of Table A4, A4
Table A4
Part joint parts
The working wheel and the main journal and the fan wheel and the main journal||tt| |Nozzle ring blade throat width
Nozzle ring blade height
Coordination of shaft groove and chain
Cooperation of wheel segment groove and escapement
Nozzle ring positioning external reading and The volute positioning hole cooperates with the bearing positioning outer surface and the positioning hole.
The barrier between the bearing and the journal
The axial gap between the working wheel and the inner diffuser
The fan wheel and the fan Duandong's axial contact
The distance between the inner hole of the sealer and the main shaft
Tolerance and fit
H6/h5 or H6/g5
Dimension 1:20 (Contact surface>70%)
Je12
Js10
N9/h9
D10/h9
H7/h6 or H7/g6||tt ||Surface roughness value R.
3.2
1.6
0.2
6.3
0.4
1.6
Standard No.
GB1801
GB1801
GB1095,GB1096
GB1801
I design Wai Xiang Regulations
um
7| |tt||A5
JB/T433492
The surface shape and position tolerance of the main parts are as specified in Table A5 Table A5
Part name
Snail||tt| |Yao
fan wheel
and
working wheel
main shaft
spray ring
shaft
bearing|| tt||Part and tolerance name
The coaxiality of the axis of each hole for installing the inner diffuser and the nozzle ring to the axis of the positioning hole of the intermediate body. The end face of the inner diffuser and the end face of the neck ring. The sag of the entire line of the positioning hole for installing the inner diffuser
The circular runout of the blade shape busbar to the axis of the shaft hole The verticality of both ends facing the axis of the shaft hole
Integral increase to the axis of the shaft hole The degree of symmetry
The circumference of the bearing journal
The axiality of the bearing journal to its common axis
The cumulative runout of the thrust surface facing the common axis of the bearing shaft carbon Flatness
Symmetry of the common axis of the key grid to the bearing journal, sufficient coaxiality of the common axis of the working wheel and fan wheel positioning journal to the vertical axis of the journal, and the coaxiality of the common transmission line of the other journals to the bearing journal Angular deviation of blade installation angle
Parallelness of both end surfaces
Perpendicularity of the blade positioning end face outside the positioning Surface movement of the thrust pair to the axis of the shaft recording hole
The flatness of the push surface
The parallelism of the positioning carbon surface to the thrust surface or the perpendicularity of the positioning cancer surface to the axis of the bearing hole The cylinder of the bearing hole
The distance between the axes of the outer four pairs of bearing holes Additional notes on axis:
This standard was proposed and managed by Hangzhou Hydrogen Generator Research Institute. This standard was drafted by Jiangxi Oxygen Generator Factory at its own expense. The main drafters of this standard are Xu Jiashin and Yang Yuzhi. 8
Tolerance Level
Level 7
Level 6
7
Level 9
Level 6
Level 4| |tt||Level 2
Level 3
Level 9
Level 6
Level 7
Level 7
Level 5|| tt||6
Level 2
Level a
Level 5
Level 7www.bzxz.net
Standard code
GB1184
04mm
A3
JB/T433492
The surface roughness value R of the main parts of the main parts shall be in accordance with the provisions of Table A3. Table A3
Parts name
Working wheel
and
Blower wheel
Sulfur ring
Yao
Main shaft
Shaft
Bearing
Parts position
Hole matching with the main shaft
Both ends that need to be straight with the shaft hole
Blade flow path surface
Key mold two-way
Blade flow path surface
Blade end face
Positioning of the installation intermediate Surface
Location surface for installing the inner diffuser
End surface fitted with the spray bag ring blade
Location hole for installing the nozzle ring
Neck for matching with the impeller and fan wheel
Bearing journal
Thrust surface
Side surfaces of the key pig
Bearing hole
Thrust surface
Location external doctor
Location end surface
The tolerances of the joints of the main parts shall be in accordance with the provisions of Table A4, A4
Table A 4
Parts joint
Match between impeller and main shaft journal and fan wheel and main shaft journal
Nozzle ring blade throat width
Nozzle ring blade height
Match between shaft groove and chain
Match between wheel section groove and escape
Match between nozzle ring positioning outer edge and volute positioning hole Match between bearing positioning outer edge and positioning hole
Breakage between bearing and shaft journal
Axial clearance between impeller and inner diffuser
Axis clearance between fan wheel and fan end Xiangwenou
Difference between the inner hole of the sealer and the main shaft
Tolerance and fit
H6/h5 or H6/g5
Dimension 1:20 (contact surface>70%)
Je12
Js10
N9/h9
D10/h9
H7/h6 or H7/g6
Surface roughness value R.
3.2
1.6
0.2||t t||6.3
0.4
1.6
Standard No.
GB1801
GB1801
GB1095,GB1096
GB1801
Our design specifications
um
7
A5
JB/T433492
The surface shape and position tolerances of the main parts shall be in accordance with the provisions of Table A5Table A5||t t||Parts name
Voltage
Yao
Blower wheel
And
Working wheel
Main shaft
Spray ring
Shaft
Bearing
Name of position and tolerance
Coaxiality of the axis of each hole for installing the inner diffuser and nozzle ring to the axis of the positioning hole for installing the intermediate bodyThe verticality of the end face of the inner diffuser and the end face of the neck ring to the entire line of the positioning hole for installing the inner diffuser
The main line of the blade shape The verticality of the two ends of the shaft hole axis to the shaft hole axis
The symmetry of the integral to the shaft hole axis
The circumference of the bearing journal
The axiality of the bearing journal to its common axis
The cumulative runout of the thrust surface to the common axis of the bearing shaft carbonThe flatness of the thrust surface
The symmetry of the key grid to the common axis of the bearing journalThe coaxiality of the working wheel and fan wheel positioning journal to the shaft and the common axis of the journalThe coaxiality of the other journals to the common transmission line of the bearing journalWhen the angle deviation of the installation angle of the plate||tt ||Parallelism of both end faces
Perpendicularity of blade locating end face to locating outer faceSurface play of thrust pair to axis of shaft hole
Flatness of thrust face
Parallelism of locating carbon face to thrust face or perpendicularity of locating cancer face to bearing hole axisCylinder of bearing hole
Axis degree of interaxiality of four pairs of bearing hole axes outside locating faceAdditional notes:
This standard was proposed and coordinated by Hangzhou Hydrogen Generator Research Institute. This standard was drafted by Jiangxi Oxygen Generator Factory. The main drafters of this standard were Xu Jiaxiao and Yang Yuzhi. 8
Tolerance grade
Grade 7
Grade 6
7
Grade 9
Grade 6
Grade 4
Grade 2
Grade 3
Grade 9
Grade 6
Grade 7
Grade 7
Grade 5
6
Grade 2
Grade a
Grade 5
Grade 7
Standard code
GB1184
04mm
A3
JB/T433492
The surface roughness value R of the main parts of the main parts is as specified in Table A3. Table A3
Part Name
Working Wheel
and
Flower Wheel
Sulfonate Ring
Yao
Spindle| | tt |
Two test passes of the key mold
Blade flow channel surface
Blade end face
Positioning surface for installing the intermediate body
Positioning surface for installing the inner diffuser
The end surface that fits the nozzle ring blade
The positioning hole for installing the nozzle ring
The neck that matches the working wheel and the fan wheel
Bearing journal|| tt||Thrust surface
Both sides of the key pig
Bearing hole
Thrust surface
Positioning end surface
The tolerances of the joint parts of the main parts are in accordance with the provisions of Table A4, A4
Table A4
Part joint parts
The working wheel and the main journal and the fan wheel and the main journal||tt| |Nozzle ring blade throat width
Nozzle ring blade height
Coordination of shaft groove and chain
Cooperation of wheel segment groove and escapement
Nozzle ring positioning external reading and The volute positioning hole cooperates with the bearing positioning outer surface and the positioning hole.
The barrier between the bearing and the journal
The axial gap between the working wheel and the inner diffuser
The fan wheel and the fan Duandong's axial contact
The distance between the inner hole of the sealer and the main shaft
Tolerance and fit
H6/h5 or H6/g5
Dimension 1:20 (Contact surface>70%)
Je12
Js10
N9/h9
D10/h9
H7/h6 or H7/g6||tt ||Surface roughness value R.
3.2
1.6
0.2
6.3
0.4
1.6
Standard No.
GB1801
GB1801
GB1095,GB1096
GB1801
I design Wai Xiang regulations
um
7| |tt||A5
JB/T433492
The surface shape and position tolerance of the main parts are as specified in Table A5 Table A5
Part name
Snail||tt| |Yao
fan wheel
and
working wheel
main shaft
spray ring
shaft
bearing|| tt||Part and tolerance name
The coaxiality of the axis of each hole for installing the inner diffuser and the nozzle ring to the axis of the positioning hole of the intermediate body. The end face of the inner diffuser and the end face of the neck ring. The sag of the entire line of the positioning hole for installing the inner diffuser
The circular runout of the blade shape busbar to the axis of the shaft hole The verticality of both ends facing the axis of the shaft hole
Integral increase to the axis of the shaft hole The degree of symmetry
The circumference of the bearing journal
The axiality of the bearing journal to its common axis
The cumulative runout of the thrust surface facing the common axis of the bearing shaft carbon Flatness
Symmetry of the common axis of the key grid to the bearing journal, sufficient coaxiality of the common axis of the working wheel and fan wheel positioning journal to the vertical axis of the journal, and the coaxiality of the common transmission line of the other journals to the bearing journal Angular deviation of blade installation angle
Parallelness of both end surfaces
Perpendicularity of the blade positioning end face outside the positioning Surface movement of the thrust pair to the axis of the shaft recording hole
The flatness of the push surface
The parallelism of the positioning carbon surface to the thrust surface or the perpendicularity of the positioning cancer surface to the axis of the bearing hole The cylinder of the bearing hole
The distance between the axes of the outer four pairs of bearing holes Additional notes on axis:
This standard was proposed and managed by Hangzhou Hydrogen Generator Research Institute. This standard was drafted by Jiangxi Oxygen Generator Factory at its own expense. The main drafters of this standard are Xu Jiashin and Yang Yuzhi. 8
Tolerance Level
Level 7
Level 6
7
Level 9
Level 6
Level 4| |tt||Level 2
Level 3
Level 9
Level 6
Level 7
Level 7
Level 5|| tt||6
Level 2
Level a
Level 5
Level 7
Standard code
GB1184
GB1096
GB1801
I design regulations
um
7
A5
JB/T433492
Main parts The surface shape and position tolerances are as specified in Table A5. Table A5
Part name
Wolf
Yao
Flower wheel
and
Working wheel
Spindle
Spray ring
Shaft
Bearing
Position and tolerance name
Install the inner diffuser and nozzle ring The coaxiality of the axis of each hole to the axis of the positioning hole of the intermediate body. The end face of the inner diffuser and the end face of the neck ring. The sag of the whole line of the positioning hole of the inner diffuser
blade The verticality of the circular runout of the external bus bar to the axis of the shaft hole and the verticality of both ends facing the axis of the shaft hole
Integer increase of the symmetry of the axis of the shaft hole
The circumference of the bearing journal
The axiality of the bearing journal to its common axis
The flatness of the thrust surface facing the common axis of the bearing shaft carbon
The symmetry of the key grid to the common axis of the bearing journal work wheel , the common axis of the fan wheel positioning journal to the shaft vertical journal is coaxial enough, the common transmission line of the other journals to the bearing journal is concentric, the installation angle angle deviation of the piece
Parallelness of both end surfaces||tt ||Perpendicularity of the blade positioning end face outside the positioning surface movement of the thrust pair against the axis of the shaft recording hole
Flatness of the thrust surface
Parallelness of the positioning carbon face to the thrust surface Or the verticality of the positioning cancer surface to the axis of the bearing hole. The cylindrical degree of the bearing hole.
The interaxiality of the axis of the four outer pairs of bearing holes. Additional instructions:
This standard is proposed by the Hangzhou Hydrogen Generator Research Institute. Jiangxi Oxygen Generator Factory was responsible for drafting this standard. The main drafters of this standard are Xu Jiashin and Yang Yuzhi. 8
Tolerance Level
Level 7
Level 6
7
Level 9
Level 6
Level 4| |tt||Level 2
Level 3
Level 9
Level 6
Level 7
Level 7
Level 5|| tt||6
Level 2
Level a
Level 5
Level 7
Standard code
GB1184
GB1096
GB1801
China's design specifications
um
7
A5
JB/T433492
The surface shape and position tolerances of the main parts shall be in accordance with the provisions of Table A5Table A5
Part Name
Snail
Yao
Fan wheel
And
Working wheel
Main shaft
Spray ring
Shaft
Bearing
Name of position and tolerance
Coaxiality of the axis of each hole for installing the internal diffuser and nozzle ring to the axis of the positioning hole for installing the intermediate body. Verticality of the end face of the internal diffuser and the end face of the neck ring to the entire line of the positioning hole for installing the internal diffuser
The circular runout of the generatrix of the blade shape to the axis of the shaft hole. The verticality of the two end faces to the axis of the shaft hole
Alignment of the whole increase to the axis of the shaft hole Balance
Circumference of bearing journal
Axis of bearing journal to its common axis
Cumulative runout of thrust surface to bearing shaft common axisFlatness of thrust surface
Symmetry of key grid to bearing journal common axisCoaxiality of working wheel and fan wheel positioning journal to shaftCoaxiality of common axis of journal for other journals to common transmission line of bearing journalOperation angle deviation of blade
Parallelism of both end faces
Blade positioning Perpendicularity of the end face to the positioning surface; Surface clearance of the thrust pair to the axis of the shaft hole; Flatness of the thrust surface; Parallelism of the positioning carbon surface to the thrust surface or the perpendicularity of the positioning cancer surface to the axis of the bearing hole; Cylindricity of the bearing hole; Interaxiality of the four pairs of bearing hole axes outside the positioning surface. Additional notes:
This standard was proposed and coordinated by Hangzhou Hydrogen Generator Research Institute. This standard was drafted by Jiangxi Oxygen Generator Factory. The main drafters of this standard were Xu Jiaxiao and Yang Yuzhi. 8
Tolerance grade
Grade 7
Grade 6
7
Grade 9
Grade 6
Grade 4
Grade 2
Grade 3
Grade 9
Grade 6
Grade 7
Grade 7
Grade 5
6
Grade 2
Grade a
Grade 5
Grade 7
Standard code
GB1184
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