This standard specifies the terms and definitions and symbols, basic parameters, technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of horizontal soft bearing balancing machines. This standard applies to horizontal soft bearing balancing machines (hereinafter referred to as balancing machines). JB/T 9393-2002 Technical conditions for horizontal soft bearing balancing machines JB/T9393-2002 Standard download decompression password: www.bzxz.net

ICS21.120.40
Machinery Industry Standard of the People's Republic of China
JB/T9393-2002
Specifications for horizontal soft-bearing balancing machines2002-07-16 Issued
2002-12-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Foreword
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Basic parameters of balancing machines
5 Technical requirements
5.1 Environment and working conditions
Installation requirements
Main performance.
Graphic symbols for balancing machines
Transportation bump resistance
Mechanical safety and electrical safety,
Other requirements
Inspection methods ..
Inspection conditions
Inspection instruments
Verification rotor
Balancing speed
Test quality
Calibration of balancing machine
Test of minimum achievable residual unbalance emar, 6.8
Test of unbalanced balance reduction rate URR
Test of resistance to transport bumps
Test of mechanical safety and electrical safety
6.11 Inspection of other requirements
Inspection rules.
Factory inspection
Type inspection
Judgment rules
8 Marking, packaging, transportation and storage
8.1 Marking
8.3 Transportation.
Figure 1 Allowable circular loss relationship diagram
Table丨Symbol
Table 2 Specified values ​​of emar and URR of balancing machine
JB/T9393—2002
JB/T9393—2002
This standard is a revision of ZBN73005-1990 "Technical conditions for horizontal soft bearing balancing machines". The inspection method for the main performance of the balancing machine is equivalent to the international standard ISO2953:1985 "Balancing machine description and evaluation", and the terms and definitions specified in the international standard ISO1925:1990 "Mechanical vibration balancing vocabulary" are directly used, and the symbols specified in the international standard ISO3719:1994 "Graphical symbols for mechanical vibration balancing machines and their instruments" are used. During the revision, this standard adjusted the structure of the original standard, made major changes to the technical content, and made editorial changes to the entire standard. This standard has some changes from ZBN73005-1990 in the following major technical contents: 1. Deleted the original standard Chapter 3 (Composition of balancing machine), Chapter 8 (Complete set and random documents of balancing machine) and Chapter 9 (Quality Assurance)
-Except the provisions of 4.5 and 5.9 of the original standard on the noise of balancing machine and its inspection method (this content has been stipulated by the mandatory industry standard JB8898--1999 "General Technical Conditions for Safety of Balancing Machines"): Newly added Chapter 3 (Terms, Definitions and Symbols) and Chapter 4 (Balancing Machine Basic Parameters). The original professional standard ZBN73005-1990 of the People's Republic of China is abolished at the same time. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Testing Machine Standardization Technical Committee. The responsible drafting unit of this standard: Changchun Testing Machine Research Institute. Participating drafting units of this standard: Beijing Qingyun Aviation Instrument Co., Ltd., Shanghai Shenke Testing Machine Co., Ltd., Shanghai Shenlian Testing Machine Factory, Xinggan Testing and Inspection Equipment Factory, Xiaogan Songlin International Measuring Instrument Co., Ltd. The main drafters of this standard are: Wang Xuezhi, Lin Dongtao, Pang Wei, Zhou Mingdao, Zhang Shimin, Dong Xiuyun. This standard was first issued in January 1990 with the professional standard number ZBN73005-1990, and this is the first revision. 1 Scope
Technical conditions for horizontal soft bearing balancing machines
JB/T9393-2002
This standard specifies the terms and definitions and symbols, basic parameters, technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of horizontal soft bearing balancing machines. This standard applies to horizontal soft bearing balancing machines (hereinafter referred to as balancing machines). 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, its latest version shall apply to this standard. GB/T2611—1992 General technical requirements for testing machines GB/T4201-1984 Verification method for general horizontal balancing machines GB/T6444 Mechanical vibration balancing terminology (GB/T6444-1995, eqvISO1925:1990) GB/T9238 Graphic symbols for balancing machines and their instruments (GB/T9238—1998, idtISO3719:1994) JB/T6147-1992 Technical requirements for packaging, packaging marking, storage and transportation of testing machines JB8898 Balancing machines
General technical conditions for safety
JB/T9390—2002 Technical conditions for horizontal hard bearing balancing machines 3 Terms, definitions and symbols
3.1 Terms and definitionsbZxz.net
The terms and definitions established in GB/T6444 shall apply to this standard. 3.2 Symbols
The symbols, units and descriptions used in this standard are shown in Table 1. Table 1 Symbol
Basic parameters of balancing machine
g·mm/kg
Nominal minimum achievable residual unbalance of balancing machineMinimum achievable residual unbalance disk
Converted from minimum achievable residual unbalance to unbalance disk per test planeMinimum achievable residual unbalance degree
Reduction rate of unbalance matrix
Fixed test mass disk
Moving test mass matrix
Reading of unbalance disk at the point among the 12 points (or 8 points) on each sideThe arithmetic mean of the readings A at the 12 points (or 8 points) on each side is equivalent to the corresponding reading value of the instrument when a test mass of 1Up is added to a certain end face. The manufacturer should give the following basic parameters in the relevant technical documents of the balancing machine: JB/T9393—2002
a) Balancing speed range:
b) Maximum mass of the balanced rotor:
c) Maximum diameter of the rotor.
5 Technical requirements
Environment and working conditions
The balancing machine should be able to work normally under the following conditions: Room temperature is within the range of 10℃~35℃:
Relative humidity does not exceed 85%:
The fluctuation of the power supply voltage of the electrical measurement part does not exceed ±10% of the rated voltage: There is no corrosive medium around.
5.2 Installation requirements
The installation level is within 0.2/1000:
When installing the balancing machine, other factors such as external vibration and electromagnetic radiation should be considered and corresponding measures should be taken: The cables, connectors and pipe joints used for installation and connection should have the requirements of the rated value (such as voltage, current, pressure, etc.); The manufacturer should provide the overall size and quality of the balancing machine and the foundation type (such as concrete base, d
workbench, etc.) and size to ensure the specified performance of the balancing machine.
5.3 Main performance
The minimum achievable residual unbalance emur and unbalance reduction rate URR of the balancing machine shall comply with the provisions of Table 2. Table 2 Specified values ​​of em and URR of the balancing machine
Maximum weight of the rotor to be balanced
5.4 Graphic symbols for balancing machines
Transmission mode
Universal joint
Support mode
Sliding support
Roller support
Sliding support
Dredge wheel support
Sliding support
Roller support
gmm/kg
Graphic symbols used on balancing machines and their instruments shall comply with the provisions of GB/T92385.5 Resistance to transport bumps
The balancing machine shall be able to withstand the transport bump test without damage under packaging conditions. After the test, the balancing machine shall still fully meet the requirements of this standard without any adjustment (excluding normal adjustments permitted by the operating procedures). 5.6 Mechanical safety and electrical safety
The mechanical safety and electrical safety requirements of the balancing machine shall comply with the provisions of JB8898. Other requirements
The basic requirements, processing and assembly, and appearance quality of the balancing machine shall comply with the relevant provisions of Chapters 3, 4, and 8 of GB/T2611-1992. 6 Inspection method
6.1 Inspection conditions
The balancing machine shall be inspected under the environment and working conditions specified in 5.1. 6.2 Inspection instruments
The instruments, tools and measuring tools used in the inspection include: a) tachometer (or speedometer);
b) balance with sufficient weighing and accuracy of ±0.1%; c) level;
d) general inspection instruments and inspection tools.
6.3 Verification rotor
JB/T9393—2002
6.3.1 The material, shape, mass and size of the verification rotor shall comply with the provisions of Chapter 2 of GB/T4201--1984 and Figure 1 and Table 1 of the standard. 6.3.2 Principles for selecting the verification rotor:
A verification rotor with a mass less than one-third of the maximum rotor mass allowed to be balanced by the balancing machine should be selected from the verification rotors specified in 6.3.1 for various tests.
If the required verification rotor mass is less than 0.5kg or greater than 500kg, the verification rotor can be determined by negotiation between the manufacturer and the user. 6.3.3 For balancing machines used close to the lower limit of the mass range of permissible balancing, additional tests shall be carried out using a verification rotor whose mass is close to the lower limit of the permissible mass range to determine the performance of the balancing machine within the mass range where the parasitic mass of the support has a significant effect on the test results.
Note: Parasitic mass
6.4 Balancing speed
In the vibration system of the support frame, other parasitic masses other than the balanced rotor, which move due to the unbalanced force generated by the rotor. When the balancing machine is subjected to the EMA and URR tests, the balancing speed selected shall be the minimum speed specified by the manufacturer for the verification rotor mass.
The maximum speed agreed upon for the heaviest rotor may be used with the agreement between the manufacturer and the user. 6.5 Test mass placement
The test mass shall be bolts, screws, tape, etc., and the center of mass position shall be given before the test. The mass accuracy requirements, installation position requirements and calculation of the test mass shall comply with the provisions of 3.2, 3.3 and 3.4 of GB/T4201-1984.
6.6 Calibration of the balancing machine
Before conducting the EM and URR tests, the machine shall be adjusted and calibrated according to the adjustment procedures specified in the balancing machine manual. During calibration: EMAR uses a test mass of 10Upp: URR uses a test mass of 25Up. After calibration, the value potentiometer and the plane separation potentiometer are not allowed to change during the test. 6.7 Test of the minimum achievable residual unbalance EMAR 6.7.1 After completing the mechanical adjustment and calibration of the balancing machine with the calibration rotor, balance the calibration rotor until the residual unbalance is less than 5Umarcl° 6.7.2 On any two non-test planes of the calibration rotor, add an unbalance mass equivalent to 10Upp~20Up on the test plane. The relative positions of the two unbalance masses shall not be in phase or in reverse phase. 6.7.3 According to the procedure specified by the balancing machine, start balancing no more than 4 times on the left and right test planes (avoid the "N" hole) according to the readings of the balancing machine (on-site weighing of the calibration mass is allowed). The position and size of each calibration mass applied should be recorded in detail in the columns specified in Table 2 of GB/T4201-1984 (Table 3 of JB/T9390-2002 can also be used) to check whether the calibration mass has flown out or fallen off.
6.7.4 For balancing machines with universal joints, rotate the universal joint 60° or 90° relative to the calibration rotor. If the first reading of the emar is not ideal, it is allowed to adjust the connection between the calibration rotor and the universal joint once. 6.7.5 Use two 10Upp test masses to add the "0" holes on the left and right end faces simultaneously and in phase, and change the two test masses one position at a time in any order at 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°, 12 positions (or 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°, 8 positions) for testing. According to the operating procedures, only one reading is allowed for each start. The test data of 12 positions (or 8 positions) should be recorded in the test record table specified in Table 3 of GB/T4201-1984 (Table 4 of JB/T9390-2002 can also be used). 3
JB/T9393--2002
6.7.6 Draw a curve graph based on the readings A at 12 (or 8) points (the format can be found in Figure 1 of JB/T9390-2002). 6.7.7 The arithmetic mean A of A, is calculated according to formula (1): Where:
n=12 (or 8).
6.7.8 All readings of A, shall simultaneously meet the conditions specified in the following two formulas, and the emr test shall be qualified. 9A6 Draw a curve graph based on the readings A at 12 (or 8) points (the format can be found in Figure 1 of JB/T9390-2002). 6.7.7 The arithmetic mean A of A, is calculated according to formula (1): Where:
n=12 (or 8).
6.7.8 All readings of A, should simultaneously meet the conditions specified in the following two formulas, and the emr test is qualified. 9A6 Draw a curve graph based on the readings A at 12 (or 8) points (the format can be found in Figure 1 of JB/T9390-2002). 6.7.7 The arithmetic mean A of A, is calculated according to formula (1): Where:
n=12 (or 8).
6.7.8 All readings of A, should simultaneously meet the conditions specified in the following two formulas, and the emr test is qualified. 9A
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.