Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T7767.2-95
Milk separator
1995-06-16 Issued
Test method
1996-07-01 Implementation
Ministry of Machinery Industry of the People's Republic of China
Subject content and scope of application
Cited standards
Test materials and conditions
Test procedures and methods
Test report
Noise correction method, noise Calculation of acoustic average value (reference) Appendix A
Test equipment, instruments, meters and reagents (reference) Appendix B
Machinery Industry Standard of the People's Republic of China
Milk separator
Test method
1 Subject content and scope of application
JB/T7767.2-95
This standard specifies the relevant terms, items, materials, devices, instruments, conditions and result processing of the main component tests, performance tests and reliability tests of milk separators. This standard applies to milk separators specified in GB7682 (hereinafter referred to as separators). 2 Reference standards
GB/T5409
GB7682
GB9239
JB/T7767.1
JB/NQ203
JJG176
JJG188
3 Terms
3.1 Rated processing capacity
Milk inspection method
Types and basic parameters of milk separators
Rigid rotor balance quality Determination of allowable imbalance Technical conditions of milk separators
Reliability assessment and evaluation indicators and general rules for fault classification of engineering agricultural machinery products Verification procedure for sound calibrator
Verification procedure for sound level meter
The volume or weight of milk processed by the separator under rated conditions per unit time. 3.2 Rated operating conditions
The operating conditions when the separator meets the separation performance requirements specified in the design under the rated speed, material conditions, separation temperature and inlet and outlet pressure conditions specified in the design.
3.3 Rated speed
The number of rotations of the separator body specified in the design in 1 minute. 4 Test materials and conditions
4.1 Test materials
4.1.1 Factory inspection, reliability test is generally room temperature water. 4.1.2 Performance test, should be the material specified in the design (fresh milk). 4.2 Test conditions
4.2.1 Preparation of test documents
Before the test, the relevant technical documents should be submitted and checked according to the provisions of JB/T7767.1, and the test result record sheet should be prepared. 4.2.2 Inspection before the test
Before the test, the separator to be tested should be inspected according to the provisions of JB/T7767.1. Only when it meets the requirements can it enter the whole machine test. Safety checks should also be carried out on the test system. All rotating parts should have protective devices, and electrical equipment should be reliably grounded. 4.2.3 Sample preparation
Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
JB/T7767.2-95
The samples used to measure the separation effect in the separation performance test of the separator should be prepared in accordance with the provisions of GB/T5409. 4.2.4 Parameter measurement
The measurement of all parameters of the separator should be carried out under the rated working conditions of the machine. Each measurement parameter should be measured 3 times and the arithmetic mean value should be taken. 4.2.5 Test requirements
a. Before the test, various instruments, meters and equipment should be checked and calibrated according to the accuracy level specified in the relevant standards; the supporting power working voltage is 220V or 380V, and the deviation shall not exceed 5%; b.
Fresh milk for the test shall be filtered through four layers of gauze, its acidity shall not be higher than 20T, its fat content shall not be higher than 3.5%, and its fat content shall not be greater than 40%. The temperature shall be 40±5℃, and the natural uniformity of fat globules shall not be destroyed during heating. 5 Test procedures and methods
5.1 Startup test
When the terminal voltage and frequency of the power supply are within 5% of the rated value, start the separator without load, measure the time, voltage and maximum starting current of the separator from starting to rated speed, and check the running status during the starting acceleration process. The factory test is started once, and the type test is started 3 times. The test results are recorded in Table 2.5.2 Stop test
After the separator runs at rated speed for at least 5 minutes, cut off the power supply and stop the machine without load. Measure the time from the power supply cut off to the separation stopping at the end. Factory test once, type test 3 times. The stopping process of different models is divided into three states. When testing, at least one of the following methods can be selected. The test results are recorded in Table 2. Cut off the power supply, brake when the separation body slows down to below 1000r/min, and measure the parking time until the separation body finally stops rotating.a.
Cut off the power supply, brake immediately (such as electromagnetic brake), and measure the fast stopping time until the separation bowl finally stops rotating: b.
Cut off the power supply, do not brake, and measure the free stopping time until the separation bowl finally stops rotating. c.
5.3 Inlet and outlet pressure test
Test conditions:
! Type A (material inlet and outlet are completely open) does not need to measure the inlet and outlet pressures; Type B (material inlet is closed, outlet is open) can only measure the inlet pressure: Type C (material inlet and outlet are completely closed) needs to measure the inlet and outlet pressures. The inlet and outlet pressure tests should be carried out on a special test bench, or pressure gauges (the pressure gauge range matches the measured pressure value) can be installed at the feed inlet and the cream and skim outlets respectively. When the separator reaches the rated speed, the pressure test is carried out. The test time is not less than 3 minutes, and there should be no leakage at the seals of the separator. The test results are recorded in Table 2. 5.4 Capacity Test
The capacity of the separator is tested by the flow meter method, that is, the flow meter is installed in front of the test sample input port before the test, and the flow meter is turned on and the timing is started when the separator reaches the rated speed. Each measurement time is 1 minute, and the arithmetic mean of 8 measurement data is taken as the measurement result. 5.5 Slag discharge test
The slag discharge test should be carried out on the separator with automatic slag discharge. During the test, the flexibility, reliability and slag discharge amount of the slag discharge mechanism should be checked.
5.6 Test of main components
The purpose of this test is to check whether the main components meet the design requirements. 5.6.1 Dynamic balance test of separation body
After weighing the assembled separation body parts, install them on the dynamic balance test machine, and measure the allowable residual unbalance of the separation body correction plane during idling operation. Calculate according to formula (1):
Where: M-
-allowable residual unbalance, 8·cm;
Part (or component) weight, kg;
JB/T7767.2-95
Allowable eccentricity of the center of gravity of the part (or component), μm. The allowable eccentricity of the center of gravity is calculated according to formula (2): bzxZ.net
Where: A—-dynamic balancing accuracy, taken as ≤6.3mm/s;--part (or component) rotational angular velocity, rad/s. The rotational angular velocity of the separation bowl component is calculated according to formula (3): Yuann
Where: n-part (or component) speed, min\1(2)
The M value calculated by formula (1) is the total allowable residual unbalance at the center of gravity of the component. When used in production, the M value is divided into two parts, and the allowable residual unbalance on the two correction planes (see Figure 1) is calculated respectively, and calculated according to formula (4) and formula (5). Figure 1
Allowable residual unbalance on correction plane 1 (see Figure 1), g: cm; Where: M
M—allowable residual unbalance on correction plane 1 (see Figure 1) g·cm; L—the distance from the center of gravity of the component to the correction plane 1.mm; L——the distance from the center of gravity of the component to the correction plane I, mm. Note: Correction plane 1 and! should be selected so as not to affect the strength and working performance of the balancing part and on two planes as far from each other as possible. The above measurement and calculation results shall be recorded in Table 3. 5.6.2 Separator strength test
5.6.2.1 Test requirements
The strength test shall be carried out in a test room with special equipment or on a test device that ensures the absolute safety of the staff. 5.6.2.2 Before the test, measure and record the main dimensions of the separation bowl (separator cover, separation bowl base), and mark the measurement points. (5)
5.6.2.3 The strength test shall be carried out with water or fresh milk. When the separator reaches the rated speed, start to separate the test object, and at the same time increase the speed of the separation body at a uniform rate. Its angular velocity shall ensure that the test load is greater than 20% of the rated load (about 10% increase in speed). Calculate the angular velocity under specific conditions. When the diameter of the separation bowl is ≤250mm, the test time shall be not less than 5min. When the diameter is >250mm, the test time shall be not less than 3min.2-95
Test time shall not be less than 30min.
5.6.2.4 For separation bowls with a diameter greater than 500mm, the main parts shall be measured at least 3 times (in two aspects) before the strength test, and the error of the special measuring tools used for measurement shall not exceed 0.01mm. 5.6.2.5 After the test, measure the dimensions of the separation bowl at the original mark (separation body cover, separation body base). If residual deformation is found, it is necessary to repeat the test according to 5.6.2.3. Parts with greater deformation after the test shall be scrapped. The measurement results shall be recorded in Table 4.
5.6.3 Determination of comprehensive stiffness deviation of shockproof springs 5.6.3.1 The stiffness of shockproof springs shall be tested on a universal calibrator. A group of shockproof springs shall be tested one by one on the testing machine, and a certain pre-pressure shall be applied during the test. The deformation at the same pressure F, F, ..F. during loading and unloading shall be measured respectively. The average stiffness of each spring shall be calculated according to formula (6).
Where: Qa
Average stiffness of a spring, N/mm;
Each pressure load value, N;
H. Deformation corresponding to each pressure value during loading, mmH.
Deformation corresponding to each pressure value during unloading, mm; Number of selected pressure values.
5.6.3.2 Average stiffness of a group of springs
Where: Q
-Average stiffness of a group of springs, N/mm;
i-Number of springs.
5.6.3.3 Comprehensive stiffness deviation
Where: Q,—Comprehensive stiffness deviation;
Q, -&_&
&×100%
and Q. The average stiffness of the spring with the largest difference, N/mm. The above measurement and calculation results are recorded in Table 5. 5.7 Separator performance test
When the separator is running under rated conditions, fresh milk is used for testing and the following contents are determined. (6)
5.7.1 Rated processing capacity
5.7.1.1 When the separator reaches rated conditions, the fat and skim milk are taken at the same time, and the total weight of the fat and skim milk separated within tmin is weighed, and the rated processing capacity is calculated according to formula (9). 60G
Wherein; Q pure hourly rated processing capacity, L/h; milk density, kg/L;
time, min;
+ (9)
total weight of fat and skim milk, kg.
5.7.1:2 When measuring the rated processing capacity of a separator greater than 200L/h, record the power consumption E and calculate the power output value according to formula (10).
Where: Ga-
KWh of electricity output, L/(kW·h);
Electric energy consumption, kw.h.
5.7.2 Determination of skim milk fat content
JB/T.7767.2-95
5.7.2.1 Separate the fresh milk for the test at the rated speed of the separator, and take samples after the machine has been running for 5 minutes. 5.7.2.2 Take samples when the volume ratio of milk fat to skim milk is 1: (2.53.5), 1* (7~8), 1 (11.5~12.5), and take two 50mL skim milk samples for each volume ratio, with an interval of 3 minutes between each group of samples. 5.7.2.3 After sampling, determine the skim milk fat content according to 2.3.3 of GB/T5409. Record the test results in Table 6.
5.7.3 Determination of the volume ratio of milk fat and skim milk
5.7.3.1 During the determination, change the position of the adjusting screw plug of the separator bowl, then start the machine. When the separator reaches the rated speed, turn on the milk switch for 3 minutes. Use a measuring cup to collect milk fat and skim milk at the same time (milk fat must not be less than 5mL). After the sample has been allowed to stand for 3 minutes, read the scale of the measuring cup and calculate the volume ratio (the volume of skim milk should include one-third of the foam volume). 5.7.3.2 During the test, the maximum and minimum volume ratios of milk fat and skim milk should be measured respectively. The test results should be recorded in Table 6.
5.8 Separator vibration test
5.8.1 Requirements for vibration test instruments
The vibration test instrument should be able to directly display the effective value of the mechanical vibration speed of the separator within the frequency range of 10 to 1000Hz. 5.8.1.2 The vibration sensor must be securely fixed on the measuring point according to the use requirements, and the vibration sensor must not affect the vibration characteristics of the machine. 5.8.1.3 The cable length and model should meet the use requirements of the instrument. The temperature, magnetic field, sound field and other environmental conditions of the test environment must meet the requirements of the test instrument use environment.
5.8.2 Installation of the tested separator
5.8.2.1 The tested separator should be installed on the basis of the machine design requirements or on a foundation or platform that is greater than 10 times the mass of the tested machine, and ensure that the connection between the tested machine and the platform or machine meets the design requirements. 5.8.2.2 During the no-load test, the tested separator must be run stably at the rated speed for vibration testing. 5.8.2.3 During the loaded test, the load and material of the tested separator should meet the requirements of the rated working conditions of the separator, and the vibration test should be carried out after reaching the rated speed.
5.8.3 Measuring point
5.8.3.1 The measuring point of the separator with a capacity less than 200L should be selected at the separation bowl chamber. After the sensor is installed, it should be ensured that it does not affect the vibration characteristics of the separator. See Figure 2.
Separation chamber
JB/T7767.295
5.8.3.2 The measuring point of the separator with a capacity greater than 200L should be selected at the bearing part of the measured separator. For the measuring point where the sensor cannot be directly installed at the bearing part, it is allowed to move the sensor along the measuring point to the solid body closest to the bearing part. 5.8.3.3 The markings of the measuring points are X, Y, and Z marks. X is called the positive direction (perpendicular to the vertical axis), Z is called the axial direction (parallel to the vertical axis), and Y is called the lateral direction (the direction perpendicular to X and Z). See Figure 3. 5.8.4 Measurement || tt || 5.8.4.1 During the alarm test, first detect the amplitude value (basic amplitude value) of the separator vibration caused by the environment. Its value should be less than one-third of the minimum amplitude value measured when the separator is running, otherwise the test environment should be changed. 5.8.4.2 During the measurement, place the sensor close to the measured part (as shown in Figures 2 and 3). When the separator is running at rated speed, measure in the three directions of X, Y, and 2. If the sensor cannot be installed in one direction, it is allowed to cancel the measurement direction. 5.8.4.3 The maximum amplitude value measured at the specified measurement point and in the specified direction is used as the vibration parameter of the machine under test. 5.8.4.4 When using a sound level meter for measurement, the sound level meter should be set to the "S" (slow) position. When the sound level meter pointer swings less than ±3 dB, take the average value as the measurement result, and convert the measurement result by at least one of the following three methods: dB-perturbation unit conversion scale;
dB-ratio conversion table;
engineering calculator.
Record the conversion result in Table 7.
5.9 Separator noise test
5.9.1 Calibration
Before and after each measurement, a sound level calibrator with an accuracy better than ±0.5 dB should be used to calibrate the noise level at one or more frequencies. The whole test system should be calibrated at the same rate. If the difference between the two calibration values before and after the measurement exceeds 1dB, the measurement is invalid. The sound level calibrator should be calibrated according to JJG176. The sound level meter and other test instruments should be calibrated regularly according to JJG188 to ensure the accuracy of the test instruments. 5.9.2 Installation and operation of the separator
8. The separator should be installed according to the relevant technical documents in JB/T7767.1. All accessories should be installed completely, but no additional sound insulation and sound absorption components should be added.
b. Generally, the separator should be placed directly on the ground or on the test platform for noise measurement. When it is necessary to install it on the spot, When measuring in a field, the measurement can be carried out according to the actual installation position, which should be stated in the test report. c. The noise measurement should be carried out when the separator is running stably at the rated speed. 5.9.3 Measurement environment
5.9.3.1 The separator should be measured in a white sound field above a reflecting plane, and there should be no other reflecting objects within 6m around the sound source being measured.
5.9.3.2 In any case, there should be no reflecting objects within 1m of the microphone, and the operator should be more than 0.5m away from the microphone when reading.
5.9.3.3 Wind speed near the measuring point during measurement The speed should be less than 6~8m/s (equivalent to level 4 wind). When the wind speed is greater than 6~8m/s, the microphone should use a windshield.
5.9.4 Background noise
The background noise should be at least 10dB lower than the reading of the measured separator. When the difference is 3~10dB, it should be corrected according to Table 1. Table 1
Difference between the sound pressure level at the measuring point and the background sound pressure level
Correction amount to be subtracted
5.9.5 Quantity to be measured
Measurement A-weighted sound pressure level.
Invalid measurement
5.9.6 Measurement location
JB/T 7767.2-95
5.9.6.1 The measuring position is selected based on the horizontal distance of 1m from the main surface closest to the separator. 5.9.6.2 If the height of the separator (measured from the machine base) is less than 1m, the measuring height is selected as 1m, and if the height of the separator is higher than .1m, it is selected as 1.5m. The arrangement of measuring points is shown in Figure 4.
5.9.7 Measurement
5.9.7.1 The microphone points to the sound source.
5.9.7.2 The sound level meter uses the "slow" time metering property. When reading, the average value of the pointer swing is read when the pointer swings. 5.9.7.3 Measure the background noise at the measuring point.
5.9.7.4 Measure the A-weighted sound pressure level at each measuring point. 5.9.8 Calculation formula
Measure the data at each point according to formula (11) to calculate the average sound pressure level: L,=10lg
Wherein: L-A-weighted or octave band average sound pressure level, dB; Lp\--A-weighted or times rated sound pressure level at the ith measuring point, dB; N--total number of measuring points.
Enter the above measurement results into Table 7.
5.9.9During the noise test of the separator, its slag discharge pipe shall be connected to the outside or the pipe mouth shall be closed to simulate the actual working conditions. Separator reliability test
Test requirements
5. 10. 1. 1
5. 10. 1.2
5. 10.1. 6
5. 10.1.7
Before the test, the prototype shall be installed, adjusted and tested according to the requirements of the instruction manual. The average load of the test shall not be less than 96% of the full load. During the test, normal repair, maintenance and adjustment shall be carried out strictly in accordance with the provisions of the instruction manual. Before and after the test, the prototype shall be fully inspected and detailed records shall be made to find out all unrecorded faults. Before and after the test, performance tests shall be carried out.
Reliability performance tests must be carried out with fresh milk, and reliability operation tests can be carried out with clean water at room temperature. Test personnel must be trained in reliability knowledge. Test items
5. 10. 2. 1
Main performance parameters of the separator
·(11)
No-load performance:
Spindle speed, min\;
Amplitude, mm;
Noise, dB(A).
Load performance:
Dynamic balance of separation body;
Spindle speed, min:
Rated processing capacity, t/h;
Separation bowl sealing;
Noise, dB(A).
Operation quality:
Fat content of skim milk:
Volume ratio of milk fat to skim milk.
5.10.2.2Reliability operation test measurement content a.
JB/T7767.2-95
Mean operation time before first failure MTTFF; Mean time between failures MTBF;
Failure and its analysis.
5.10.3Sampling
The sampling of reliability test samples shall be carried out in accordance with Article 6.2.3 of JB/T7767.1. 5.10.4 Test method
According to 5.4.2, 5.4.3, 5.5 and 5.6 of this standard, measure the performance parameters of 5.10.4.1
respectively before and after the reliability assessment test. Enter the corresponding table
5.10.4.2 Reliability operation test
a. Test plan
This test adopts the replacement timed truncation test plan. Reliability operation
Keep an operation diary, record the observed data in Table 8, and provide textual explanations when necessary. If a failure occurs, the machine should be stopped for inspection, and Table 9 and Table 10 should be filled in carefully. At the end of the test, the summary should be filled in Table 11 and Table 12. 5.10.4.3
Where: n
Determine the average operating time MTTFF before the first failure: MTTFF
Number of test machines:
Number of test machines that have the first failure (excluding minor failures); The operating time when the i-th prototype has the first failure, h; The cumulative operating time of the i-th prototype that has not failed at the end of the reliability operation test·h. Determine the mean time between failures MTBF:
Number of test machines;
Where: n
Truncation time, h;
6 Test report
The total number of failures that occurred during the truncation time (minor failures are not counted). After the test is completed, the test data and information should be sorted out and summarized in a timely manner, and a test report should be written. 6.1
6.2 Main contents of the test report
JB/T7767.2-95
Test purpose, test requirements and the origin of the test task, start and end time, location, prototype introduction, etc.; test conditions and analysis;
Test data and results;
Analyze based on the test results.
Based on the test data and the main problems found in the test, combined with the test conditions and test methods, analyze and comprehensively evaluate the performance stability, adaptability and reliability of the separator, and put forward new suggestions and improvement opinions. 6.3 Conclusions and opinions
Startup, shutdown and pressure test record
Startup test
Startup test
Maximum electric conduction
Startup time
Situation when passing critical speed
Test liquid density
kg/m2(20C)
Tester:
Test date:
Dynamic balancing machine model
Working weight
Working height
Working diameter
Working speed
Working angular velocity
Unbalanced force
Eccentricity
Balancing accuracy
Tester:
Rated speed of separator
Liquid inlet pressure Pa
Stop test
Number of stops
Stop time
Whether the brake device is used or not
Speed of separator during braking
Working condition of brake device
Grease outlet pressure
Reviewer,
Table 3 Separator dynamic balancing test record
Machine model:
Sensitivity of dynamic balancing machine
Speed of dynamic balancing machine
Reviewer:
Minimum detection amount
Degreasing hole outlet pressure
Phase angle errordB(A).
Operation quality:
Fat content of skim milk:
Volume ratio of milk fat to skim milk.
5.10.2.2Reliability operation test measurement content a.
JB/T7767.2-95
Mean operation time before first failure MTTFF; Mean time between failures MTBF;
Failure and its analysis.
5.10.3 Sampling
The sampling of reliability test samples shall be carried out in accordance with Article 6.2.3 of JB/T7767.1. 5.10.4 Test method
According to 5.4.2, 5.4.3, 5.5 and 5.6 of this standard, measure the performance parameters of 5.10.4.1
respectively before and after the reliability assessment test. Enter the corresponding table
5.10.4.2 Reliability operation test
a. Test plan
This test adopts the replacement timed truncation test plan. Reliability operation
Keep an operation diary, record the observed data in Table 8, and provide textual explanations when necessary. If a failure occurs, the machine should be stopped for inspection, and Table 9 and Table 10 should be filled in carefully. At the end of the test, the summary should be filled in Table 11 and Table 12. 5.10.4.3
Where: n
Determine the average operating time MTTFF before the first failure: MTTFF
Number of test machines:
Number of test machines that have the first failure (excluding minor failures); The operating time when the i-th prototype has the first failure, h; The cumulative operating time of the i-th prototype that has not failed at the end of the reliability operation test·h. Determine the mean time between failures MTBF:
Number of test machines;
Where: n
Truncation time, h;
6 Test report
The total number of failures that occurred during the truncation time (minor failures are not counted). After the test is completed, the test data and information should be sorted out and summarized in a timely manner, and a test report should be written. 6.1
6.2 Main contents of the test report
JB/T7767.2-95
Test purpose, test requirements and the origin of the test task, start and end time, location, prototype introduction, etc.; test conditions and analysis;
Test data and results;
Analyze based on the test results.
Based on the test data and the main problems found in the test, combined with the test conditions and test methods, analyze and comprehensively evaluate the performance stability, adaptability and reliability of the separator, and put forward new suggestions and improvement opinions. 6.3 Conclusions and opinions
Startup, shutdown and pressure test record
Startup test
Startup test
Maximum electric conduction
Startup time
Situation when passing critical speed
Test liquid density
kg/m2(20C)
Tester:
Test date:
Dynamic balancing machine model
Working weight
Working height
Working diameter
Working speed
Working angular velocity
Unbalanced force
Eccentricity
Balancing accuracy
Tester:
Rated speed of separator
Liquid inlet pressure Pa
Stop test
Number of stops
Stop time
Whether the brake device is used or not
Speed of separator during braking
Working condition of brake device
Grease outlet pressure
Reviewer,
Table 3 Separator dynamic balancing test record
Machine model:
Sensitivity of dynamic balancing machine
Speed of dynamic balancing machine
Reviewer:
Minimum detection amount
Degreasing hole outlet pressure
Phase angle errordB(A).
Operation quality:
Fat content of skim milk:
Volume ratio of milk fat to skim milk.
5.10.2.2Reliability operation test measurement content a.
JB/T7767.2-95
Mean operation time before first failure MTTFF; Mean time between failures MTBF;
Failure and its analysis.
5.10.3 Sampling
The sampling of reliability test samples shall be carried out in accordance with Article 6.2.3 of JB/T7767.1. 5.10.4 Test method
According to 5.4.2, 5.4.3, 5.5 and 5.6 of this standard, measure the performance parameters of 5.10.4.1
respectively before and after the reliability assessment test. Enter the corresponding table
5.10.4.2 Reliability operation test
a. Test plan
This test adopts the replacement timed truncation test plan. Reliability operation
Keep an operation diary, record the observed data in Table 8, and provide textual explanations when necessary. If a failure occurs, the machine should be stopped for inspection, and Table 9 and Table 10 should be filled in carefully. At the end of the test, the summary should be filled in Table 11 and Table 12. 5.10.4.3
Where: n
Determine the average operating time MTTFF before the first failure: MTTFF
Number of test machines:
Number of test machines that have the first failure (excluding minor failures); The operating time when the i-th prototype has the first failure, h; The cumulative operating time of the i-th prototype that has not failed at the end of the reliability operation test·h. Determine the mean time between failures MTBF:
Number of test machines;
Where: n
Truncation time, h;
6 Test report
The total number of failures that occurred during the truncation time (minor failures are not counted). After the test is completed, the test data and information should be sorted out and summarized in a timely manner, and a test report should be written. 6.1
6.2 Main contents of the test report
JB/T7767.2-95
Test purpose, test requirements and the origin of the test task, start and end time, location, prototype introduction, etc.; test conditions and analysis;
Test data and results;
Analyze based on the test results.
Based on the test data and the main problems found in the test, combined with the test conditions and test methods, analyze and comprehensively evaluate the performance stability, adaptability and reliability of the separator, and put forward new suggestions and improvement opinions. 6.3 Conclusions and opinions
Startup, shutdown and pressure test record
Startup test
Startup test
Maximum electric conduction
Startup time
Situation when passing critical speed
Test liquid density
kg/m2(20C)
Tester:
Test date:
Dynamic balancing machine model
Working weight
Working height
Working diameter
Working speed
Working angular velocity
Unbalanced force
Eccentricity
Balancing accuracy
Tester:
Rated speed of separator
Liquid inlet pressure Pa
Stop test
Number of stops
Stop time
Whether the brake device is used or not
Speed of separator during braking
Working condition of brake device
Grease outlet pressure
Reviewer,
Table 3 Separator dynamic balancing test record
Machine model:
Sensitivity of dynamic balancing machine
Speed of dynamic balancing machine
Reviewer:
Minimum detection amount
Degreasing hole outlet pressure
Phase angle error
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