GB/T 5898-2004 Rock drilling machinery and pneumatic tool noise measurement method Engineering method
Some standard content:
5 1/.140.20:73.100,10
National Standard of the People's Republic of China
GB/T5898—2004
Transferred to 1/TF—198
Measurement of noise emitted by rock driling machines and pneamatic tools--EngineerlngmethodPublished on 2004-06-09
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaNational Standardization Administration
Implemented on 2004-12-01
GB/T 5898—2304
The revision of the noise innovation and improvement decision: This standard is based on the GT8981936 machine and pneumatic equipment measurement engineering equivalent to the same music standard 1S1S348119%5 production and learning pneumatic engineering 5 and the air efficiency machine micro-report air call production method 3, and has been made. This standard only needs to be modified. : The English sound plate square reached
not replaced the standard G/1589319864 with general machine and pneumatic equipment under the method
vehicle difficult and s/［—Compared with the main changes as follows
foreword:
add the current normative references
comply with the noise test report format of Appendix A into the expression form, and the appendix 1 and appendix 3 of this standard are the current records. The standard is proposed by China Machinery Industry Federation: This standard belongs to the National Association of Chemical Industry (SACTCIS). The drafter of this standard is Wei Wanjiang, General Manager of Pneumatic and Mechanical Engineering. The previous versions replaced by this standard are: G137T55981986
1 Scope
Rock drilling machinery and pneumatic tools
Noise measurement method
Engineering method
This standard specifies the noise tolerance of rock drilling machinery and pneumatic tools. This standard applies to rock drilling machines and pneumatic tools (hereinafter referred to as machines) powered by compressed air. Typical machines include: rock drills, drilling vehicles, impact crushers, air chains, air shovels, air forgings, cementing machines, riveting machines, sawing machines, nailing machines, air grinding wheels, air drills, air plate machines, tapping machines, air knives, air scissors, air saws, air motors, air hoists and air cranes. Rock drills using other power sources can also be used. This standard does not apply to machines and repetitive machines that emit sound. Machines that produce pulse sounds less than 10 times per second. Method: When the same microphone is used to measure the "slow" or "middle" sound level meter, the difference between the reading and the selected effect is greater than d3, which may be some impulse noise.
2 Normative references
The following documents have become the standard through reference in this standard. All subsequent amendments (excluding those within the specified period) or revisions of the referenced documents are not applicable to this standard. However, the parties who have reached an agreement on this standard should study whether it can be used. The latest versions of these documents shall apply. For all undated references, the latest versions shall apply to this standard. G3102.7 Acoustic quantities and unit prices (neS031-7) GH/T3238 Acoustic quantities and their reference values (megSO183) Frequency range and fractional range filters (V1EC1200) GR/T3211 GR:TA?A5 Sound level meter, acoustic properties and test methods GR, T3947 Acoustic terminology GR/T E62:
Miaoyan Mechanical and Pneumatic Tools, Performance Test Fangda (1S0278?) JJG170 Sound Calibrator Verification Theorem
TIG188 Sound Level Meter Verification Procedure
3 Terms, Definitions and Units
GH3102.7CB/T3238 and GB/T3947 established terms, definitions and units apply to this standard. 4 Accuracy of Measurement
4. 1 Measured quantity
The measured quantity shall be the A-weighted sound power level. If necessary, the octave band sound power level may be measured. 4.2 Determined quantity
The determined quantity shall be the A-weighted sound power level. If necessary, the octave band sound power level may be measured. 4.3 Uncertainty width of measurement
For sound sources with relatively flat radiation but a spectrum within the frequency range of 2511Hz to 8000Hz, the standard deviation of the A-weighted sound power level shall be approximately 2. The standard deviation of the octave band sound power level shall be equal to or less than that specified in Table 1. The standard reflects the cumulative effect of all uncertainties, but does not include changes in sound power caused by machine operation. GH/T 5898-2004
Table 1 Uncertainty in measuring sound power levels in the frequency range Centre frequency/H2
250~-585
1000.-4000
Standard deviation
1. In the frequency band with a centre frequency of 63H, the main external quantity will cause an uncertainty of about 5B2. Due to the high cost performance, changes in the machine operation may exceed the standard deviation of this table. 5. Use only
5.1 Receiver requirements
5.1.1 Micrometer
The sound level meter shall comply with the provisions of GB/3735. Other measuring instruments with equivalent accuracy can also be used. The measuring instrument and the microphone can be connected by a wire or an extension rod. 5.1.2 General frequency filtering
When analyzing the spectrum, the filter used should comply with the provisions of CB/T3241. 5.2 Instrument calibration
Before and after each test: the whole measuring system (including cables) should be calibrated at least at one or several frequencies using a paper calibrator with an accuracy not less than 1.5B. The calibrator should be calibrated regularly according to the requirements of IEC 6004-16. The acoustic meter or other measuring instrument should be calibrated regularly according to the requirements of IEC 6004-188.
6 Frequency and acoustic range
6.1 Frequency range
The frequency range of the passband is the frequency range of the band with the center frequency between S[Iz and TIz. 6.2 Rated range
Within the designated frequency range, the measured sound pressure level of the measured machine is within the pre-measured band and is within the octave band. 7 Machine operation conditions
7.1. Machine rotation
The machine should be stopped at a gauge pressure of n.63MPa - U.U15MPa or other preferred pressure. When measuring, the air pressure of the machine in operation should be measured according to the provisions of [H/15>1, and the exhaust gas should be prevented from freezing. The amount of lubricating oil should meet the relevant regulations or the recommended requirements of the manufacturer.
When measuring, the geometric center of the machine should be 1m above the reflection plane, and the instrument should be installed to avoid the exhaust gas on the reflection plane and the microphone position:
The negative and installation conditions that affect the test data should be stated in the test report. 7.2 Load of the machine during measurement During the noise measurement, the machine to be measured shall operate normally under the specified conditions and loads. In order to ensure the repeatability of the load data, the measurement shall be carried out in accordance with the provisions of 7.3 and 7.4 as shown in Figure 2-14. 7.3 Load of impact machine 7.3.1 Rock drill Different types of rock drills, such as hand-held, gas-operated or bladed machines (see Figures 2-3) shall be operated as follows: GB/I5898-2004 a) The needle (pure front) shall be at least 0.5m into the granite. The part of the fiber rod outside the rock shall be 0.5m~2.1m: b) The force shall be used when measuring, and the fixing plate and the calibrated device shall be recorded in detail in the test report. 7.3.2 Drilling machines should be used under normal conditions. The operation noise should be measured according to the force method specified in 4. The external conditions should comply with the provisions of 7.3.1. 7.3.3 Impact crushers, gas-fired and gas-sensitive devices (see Figure 5) should be operated as follows: a) The machine should be operated vertically, and the working tools (blunt) should be placed in the workpiece; b) The machine should be pressed tightly; 2n--0.3 7.3.4 Pneumatic shovels, riveters, can removers, nailers. In general, the operating noise of such machines (see Figure 6) will exceed the noise produced by the machine itself. In order to measure the noise produced by the machine itself, the operation tool should be operated under the condition of impact and pressure. For example: rubber sheets, concrete blocks or blocks in sand, etc.
7.3.5 The functions of dragging machines and tamping machines should be kept vertical (see Figure T). 7.4 Loads of non-impact machines
7.4.1 Rotary machines
For this step, machines such as pneumatic wheels, pneumatic pins, pneumatic shears, pneumatic rusters, pneumatic and pneumatic tickets, etc. should be selected according to the provisions and instructions of Figure 8 to Figure 1.
The measurement should be carried out under the following operating conditions: 8) Idle operation: www.bzxz.net
b) Load operation, the measurement should be carried out when the device is at maximum power. For machines with high speed, the idle operation should be 5 times the machine's original operation. For machines with two couplings, the idle operation should be carried out at full power. The noise generated by the suction and drag device should be at least 1 dB higher than the machine's own noise in each double band. The influence of the firmware/late noise, pneumatic shears, pneumatic trimmers and similar machines should be measured under idle operation conditions.
The suction device is recorded in the load test bench
7.4.2 Gas-burning knife, pure torsion gas trigger
For this type of machine, the measurement should be carried out according to the provisions and instructions of Figure 12 to Figure 13. The measurement shall be carried out according to the following rules and methods: a) Machines without clutch, machines with fully open engine, and machines with a short-circuited engine that cuts off the air supply to the engine shall be measured in accordance with the provisions of 7.4.1; 5) Machines with clutch shall be measured in idling mode when the specified torque is reached and the driving action is still in effect. Or the machine shall be adjusted to 50° with a clutch and the output shaft shall be clamped in a vise and measured while running. 7.4.3 Impact air camera machine
Measurement of the virtual machine is carried out under the following conditions: a) Idling:
b) Loading, etc. The load value is lower than 50in. In each meaningful octave band, the noise of the energy-absorbing device is less than 10B of the noise of the machine itself. The analysis is carried out under the following conditions: No-load operation: b) Measure the noise of the machine under the specified load and rated speed. The load can be achieved by adding actual weight or energy-absorbing device. The noise of the energy-absorbing device in each meaningful octave band is at least 1UB lower than the noise of the machine itself. 8 Noise measurement
B, 1 The environment of the construction
should be a free field on a reflecting plane. Appendix B provides some opinions on the measurement environment. The measurement environment that meets the requirements of this standard is: a) a free field on a reflecting plane; b) an outdoor room that meets the requirements of Appendix B; c) a large room that meets the requirements of Appendix B.
Outdoor measurement should not have any major reflections within the range of 0 to 100% of the machine. The wind speed should be less than 6m (400 m) and the wind speed should be fast.
.2 Constant sound
When the measured sound pressure is not in operation, the sound pressure of the background noise should be measured at one side of the microphone. In the test report, the position of the machine should be recorded.
8.3 Sound measurement
8.3.1 General
During the measurement, the assistant measurement personnel and the measurement board should be as far away from the microphone as possible, and ensure that there are no obstacles and radiation objects between the machine and the microphone to avoid affecting the measurement.
8.3.2 Recording readings
The microphone position should be in accordance with 83.3. Under the operating conditions required by the machine, use the slow gear single A weighted pressure level. If necessary, the double frequency pressure level can be measured. 8.3.3 Measuring attenuation surface and microphone position
In order to determine the measuring surface and microphone position, a small rectangular hexahedron with a good envelope and fixed on the reflection plane should be used as the reference box (see Figure 1). When determining the size of the reference box, the main components that are not the sound energy radiator are not considered. The measuring surface and the reference pin surface should be parallel and 1Ⅱ apart.
The geometric center of the sound source should be 1 meter high in the reflective plane. There are generally 5 microphone positions on the measuring table, 4 of which are on the plane passing through the machine center and perpendicular to the machine axis, and the 5th position is on the axis of the machine or its extension. The distance between the exhaust center of the measuring machine and the two corresponding microphone positions is basically equal (the exhaust directly to the microphone will destroy the measurement). No measuring point is arranged between the machine and the reflecting plane. If the machine is usually used horizontally, the position of the simplest mass-charge device is preferred. If the number of the pre-standard sound pressure level is usually less than the number of microphone positions, the diameter of the microphone is sufficient. If this requirement is not met, the measurement should be carried out according to the additional microphone positions in Figure 1. In order to ensure the accuracy of the measured data, all impact machines should be measured in the vertical working state as much as possible. If the negative price is called, it is allowed to replace the movement of the sensor to the machine with the rotation of the machine. 8.3.4 Measurement technology
Period 9, 3. "For each sensor on the bone, record the level according to the provisions of 5, 2. For cases where the sound level changes at any time, the averaging time should be extended, and the slow speed of the sound level meter can meet the requirements. According to the manufacturer's certificate. The microphone should be pointed at the sound source, and the aerodynamic effect of moving the microphone should be avoided. If the same dynamic microphone technology is used, it should be stated in the test report: If the machine noise contains variable audible discrete frequency components, the measurement results will be different. Among them, the discrete component is the standard. For each reasonable use of the microphone position, the sound efficiency will be reduced by about 0.3% and the product can be less error. 4
9. Correction and calculation
Background sound correction
GD/T 5898—2004
When the difference between the sound pressure level measured by the test machine and the background noise is within 11°, the correction for the background noise shall be made according to Table 2. 2
The sound pressure level measured by the correction machine and the sound pressure of the constant source sound shall be used as the difference between the measured and the measured positions. The measurement is invalid
9.2 Calculation of the average sound pressure and the attenuation sound pressure value 7
The unit is the common
When the difference between the positions of a group of devices in 3.3.3 does not exceed 51°, the average sound pressure can be taken as the arithmetic half mean and the ambient value can be subtracted. When the difference between the readings at each position exceeds 5°, the average sound pressure or the average sound pressure value shall be calculated in units of B using the following formula: L10 [(ant Ig+ant g quantity+
wherein:
average sound source level, unit is decibel (d day): N-
total number of measuring points,
-atti g station
according to U, the A-weighted or times the band sound pressure level of the alarm position transmitted by the 1st conductor at the upper age, unit is decibel (B) according to the A-weighted or times the band sound pressure level of the alarm position transmitted by the 2nd conductor at the upper age, unit is decibel (B): [. ": the A-weighted or times the energy sound pressure level of the microphone position No. \ corrected according to 9.1, unit is decibel B] - environmental corrected value, unit is decibel (). 9.3 Calculation of the measuring surface In order to calculate the sound power, the area of the measuring surface (S) is calculated as follows: S 4 (ab & above) In the formula: The surface loss of the measuring surface is in square meters (m) 24-the width of the measuring surface (the width of the machine is 2m), in meters (m); 2h-the length of the measuring surface (the length of the machine is 2m), in meters (m); The height of the measuring surface (usually the distance from the highest measuring point to the ground), in meters (m). 1-5 The main sound transmission position: 6-the internal transmission position of the measuring device 1n-machine sin.
Figure 1 Position of the sounder
/T5898—2004
9.4 Calculation of A-weighted sound power level and frequency band sound power The A-weighted sound power level or the specific sound power level of the machine shall be calculated as follows: Lw = T+10*g
Where:
4weighted sound attack power level, in decibels (3), average sound pressure level on the measuring surface, in decibels (dB)+S-
surface area, in square meters (m) measurement reference area, 5%-1m
10Contents of noise measurement test report
Contents of noise measurement test report can be found in A.wl
2When measuring noise, the position of the handheld sound generator and microphone is less than 1
Detailed 1When determining the center of the element, the air is not used as a sensitive solution, +
When measuring noise, the position of the handheld sound generator and microphone is shown in Figure 3
4When measuring noise,Position of drilling machine and microphone GB/T5898-2004
GB/T589B-2004
For some machines of certain sizes, the position of the drilling machine and microphone may be different from that of the machine. Figure 5 Position of impact machine and microphone during noise measurement. Figure 6 Position of unloading machine and microphone during noise measurement. Figure 7 Position of fixing machine and microphone during noise measurement. Figure 8 Position of pneumatic bell and microphone during noise measurement (machine idle operation) GB/T 5898-2004
GE/T 5898—2004
Method: The muscle can be fixed on the central ruler as shown in Figure 13. Method 2, the air wheel is held at 90 degrees and then the group is fixed at 56. When the noise is measured in Figure 9, the position of the rotary pneumatic machine and the microphone (machine is responsible for the rotation of the machine) 1 in Figure 10. When the noise is measured, the position of the pneumatic motor or pneumatic motor and the microphone is 10
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