JB/T 6002-1992 Turbocharger cleanliness limits and determination methods
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB6002--92
Turbocharger
Cleanliness Limits and Determination Methods
Published on 1992-05-28
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1993-01-01
Mechanical Industry Standard of the People's Republic of China
Turbocharger
Cleanliness Limits and Determination Methods
JB600292
Published by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (Beijing 81 Box 44, Postal Code 100081)
Copyright reserved. No reproduction allowed
01/16 Printing Sheet 5/8
Words 12000
Format 880×1230
First Edition October 1992 First Printing October 1992 Print Count 0.001-500 Price 1.50 Yuan
Mechanical Industry Standard of the People's Republic of China
Turbocharger
Cleanliness Limits and Determination MethodsWww.bzxZ.net
Subject Content and Scope of Application
This standard specifies the cleanliness limits and determination methods of turbochargers (hereinafter referred to as turbochargers). This standard applies to the inspection of cleanliness of axial and radial flow turbochargers for internal combustion engines. Cited standard
GB1922
Solvent oil
Supercharger cleanliness limit
Supercharger cleanliness is expressed in terms of the impurity mass per unit, and its limit is calculated according to formula (1): WakkDe
Wherein: w..
-the impurity mass limit of each supercharger (the calculation result is rounded to an integer), mg; two empirical constants, 3mg/mm;
ki—structure correction factor. See Table 1;
k2—speed correction factor, see Table 2;
compressor impeller diameter, mm.
JB6002—92
3.2 The impurity mass limit on the supercharger oil passage, oil cavity, oil seal cover, bearing seat body, rotor, bearing and other parts is calculated according to formula (2): Wer=R..W
Wr—the impurity mass limit on each supercharger oil passage, oil cavity, oil seal cover, bearing seat body, rotor, bearing and other parts (the calculation result is rounded to an integer), mg;
R. Ratio coefficient, see Table 1.
Structural correction factor and
Ratio coefficient
Speed correction
≤18000
Sliding and floating bearings
Rolling bearings
Supercharger maximum operating speed n
≤29000
Approved by the Ministry of Machinery and Electronics Industry on 1992-05-28<47000
≤75000
Enclosed lubrication
≤120000
>120000
Implemented on 1993-01-01
Supercharger cleanliness measurement position
JB6002—92
Supercharger should be disassembled before measuring cleanliness. The measurement position shall be as specified in Table 3. Table 3
Compressor housing
Turbine housing
Supercharger oil passage, oil cavity, oil seal cover,
Bearing seat and rotor, bearing and other parts
All inner surfaces and inner surfaces of connecting accessories (excluding the bearing housing part of the external support structure). See all inner surfaces of parts a in Figure 1, a in Figure 2, and a in Figure 3 (excluding the bearing housing and water cavity of the external support structure, but including the air passage part of the intermediate housing of the external support structure and the axial flow internal support structure). See b in Figure 1, b, e, f in Figure 2, and b, e in Figure 3
All inner surfaces of the intermediate housing of the internal support structure (excluding the air passage and water cavity part), All inner surfaces of the bearing housing of the external support structure, all surfaces of the rotor and bearing components, and the inner surfaces of the oil inlet pipe and joints. See cd in Figure 1, c and d in Figure 2, c and d in Figure 3, and part d in Figure 4
Cleaning part of the inner support radial flow supercharger housing e
Cleaning part of the outer support axial flow supercharger housing Figure 2
5 Measuring instruments and cleaning liquid
5.1 Filter element
JB6002-92
Figure 3 Cleaning part of the inner support axial flow supercharger housing Figure 4 Cleaning part of the supercharger rotor and bearing
5μm microporous filter membrane (the difference between two drying and weighing should not be greater than 0.4mg). 5.2
Cleaning liquid
Use NY-190 solvent oil, which should comply with the provisions of GB1922. 5.3 Measuring instruments
Nylon round brushes and flat brushes of various sizes;
Washing bottles, weighing vessels, funnels and syringes; containers such as basins and covered buckets of different sizes: analytical balance with a sensitivity of one ten-thousandth;
Vacuum pump: vacuum degree not greater than 80kPa (600mmHg); f.
Oven, dryer and weighing bottle;
Magnet, tweezers, etc.;
Microscope with scale, whose magnification is greater than 40 times. 5.4 Filtering device
See Figure 5 for the cleaning liquid filtering device. It is allowed to place an 80-mesh filter under the filter membrane to bear the load. b
6 Preparation before determination
6.1 Sample extraction
JB6002-92
Filter membrane support
Funnel seat
Oil-resistant rubber stopper
Figure 5 Schematic diagram of filtration device
Metal clamp
Suction filter bottle
Two samples should be randomly selected from the assembly line of the manufacturer, and the sample matrix should be no less than 9. For superchargers with compressor impeller diameter greater than 200mm, the sample matrix can be less than 9 with the consent of the testing agency. 6.2 Cleanliness determination work should be carried out in a clean, well-ventilated room with safety measures. 6.3 Operators should wear clean work clothes, hats and shoes, and wash their hands. 6.4 Non-determination parts of the sample should be clean. 6.5
All sampling tools, brackets and containers should be cleaned. 6.6
The cleaning liquid used should be filtered through a microporous membrane with a pore size of no more than 5μm. The amount of cleaning liquid used is specified in Table 4.
Compressor impeller diameter
Amount of cleaning liquid used for each part
7 Operation steps
≤150
≤280
Clean the outer surface of the sample. For samples with anti-rust oil, the anti-rust oil should be cleaned before measurement. After disassembly, put them into clean containers 7.1
.
7.2 Put the cleaning liquid into a funnel or syringe, rinse the cleanliness measurement part, and use a nylon brush to scrub each measurement surface, hole, and groove. Repeat this operation at least twice. Finally, rinse once with cleaning liquid. 7.3 Collect the cleaning liquid with impurities separately. 8 Filtration and weighing of impurities
8.1 Filtration
Use the filtration device in Figure 5 to vacuum filter each part of the cleaning liquid with impurities using a microporous filter membrane not larger than 5um.
8.2 Weighing
8.2.1 Place the clean filter membrane in a half-opened weighing container, heat it in an oven at 90±5℃ for 60 minutes, take it out, cool it in a dryer for 30 minutes, and weigh it to obtain M.
JB600292
8.2.2 For the filter membrane with impurities, use cleaning liquid to clean the oil on the filter membrane. After the cleaning liquid evaporates, place the filter membrane together with the impurities in the original weighing container, half-open the cover and place it in an oven that has been heated to 90±5℃. Take it out after 60 minutes, cool it in a dryer for 30 minutes, and weigh it to obtain M.
Calculation and recording of impurities
The impurity mass is calculated according to formula (3):
WM,-M2'
Wherein: W
impurity mass, mg;
M, weight of the filter membrane with impurities after filtration, mg; M, weight of the filter membrane without impurities before filtration, mg. Use a magnet wrapped in cellophane to separate the iron filings from the impurities and weigh the weight of the iron (mg). 9.2
Use a microscope with a magnification of 40 or more to measure the size of the largest particle (length × width). 9.3
Record the measurement results according to Table 5.
Supercharger model
Compressor impeller diameter
Supercharger bearing structure and lubrication method items
Compressor housing impurities
Turbine housing impurities
Supercharger oil channel, oil cavity, oil seal cover, bearing seat body and rotor, bearing and other parts impurities
Total supercharger impurities
Weight of iron in impurities
Maximum particle size (length × width)
Abnormal objects in impurities
Inspection unit:
Cleanliness assessment
No. 1 supercharger:
Measurer:
The total amount of impurities in the supercharger is calculated according to formula (4):Manufacturer
Maximum working speed of supercharger
Filter element
No. 2 supercharger:
Date:
Wrc=We+W.+W.
Wrc—
—Total amount of impurities in the supercharger, mg;
W. —Impurities of compressor casing, mg;
W—Impurities of turbine casing, mg;
JB6002—
W. —The impurity mass of the turbocharger oil passage, oil cavity, oil seal cover, bearing seat body, rotor, bearing and other parts, mg·10.2 The total impurity mass Wrc of the turbocharger shall not be greater than the limit value W calculated by formula (1) in Article 3.1.10.3 The impurity mass W on the turbocharger oil passage, oil cavity, oil seal cover, bearing seat body, rotor, bearing and other parts shall not be greater than the limit value Wop calculated by formula (2) in Article 3.2.
10.4 The other items in Table 5 are only used for cleanliness inspection and analysis. Additional remarks:
This standard was proposed and managed by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery and Electronics Industry. This standard was jointly drafted by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery and Electronics Industry and Wuxi Power Machinery Factory. The main drafters of this standard are Jiang Liwen, Zhang Tongxin and Yang Zugen.
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