JB 8524-1997 Safety requirements for positive displacement air compressors
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB 8524-1997
Positive Displacement Air Compressor
Safety Requirements
Published on March 4, 1997
Ministry of Machinery Industry of the People's Republic of China
Implemented on October 1, 1997
JB8524-1997
This standard is not equivalent to the "Air Compressor System Safety Standard of ASME B19.1-1990" of the United States, and specifically adopts the safety requirements of the positive displacement air compressor part of the standard. The contents of the specific specified values given in the standard are all adopted in this standard. For those who have given requirements but no specific indicators, specific indicators or quantitative requirements are given according to the contents specified in the domestic product standards. However, some of the recommended requirements given in the standard are not adopted. This standard clarifies the specific requirements and inspection methods for the mechanical safety of air compressors, and coexists with GB10892-89 "Fixed Air Compressor Safety Rules and Operating Procedures". This standard is a mandatory standard. This standard shall be implemented from October 1, 1997. From October 1, 1998, all positive displacement air compressors produced, sold and used in China shall comply with the provisions of this standard. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the National Compressor Standardization Technical Committee and is under the jurisdiction of the responsible drafting unit of this standard: Hefei General Machinery Research Institute. The main drafters of this standard: Xiao Mao, Chen Fang, Chen Xiangdong 1 Scope
Machinery Industry Standard of the People's Republic of China
Positive Displacement Air Compressors,
Safety Requirements
JB8524-1997
This standard specifies the safety requirements and/or measures and the inspection and judgment methods of safety performance of positive displacement air compressors (hereinafter referred to as air compressors!).
The safety requirements and/or measures contained in this standard are for all major hazards of air compressors (except for the risk of fracture caused by material problems inside the machine,
This standard applies to air compressors that require safety certification for use in general environments. This standard does not apply to the following air compressors:
a) Air compressors with a driving power of less than 1.1kW; b) Air compressors with low exhaust pressure c) Air compressors with a pressure of more than 0.034MPa; c) Air compressors for special air supply for breathing, diving and surgical operations; d) Air compressors for air brake systems: e) Air compressors for process flow and air separation equipment 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid: All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB15089
GB19190
GB4208
GB/T4975
GB498085
GB6075
GB7184
GB7777
GB 778687
GB1039789
GB/T13276
GB/T13278
GB/T13279
GB/T13306
Approved by the Ministry of Machinery Industry on March 4, 1997
Steel pressure vessels
Steel shell and tube heat exchangers
Packaging, storage and transportation pictorial symbols
Enclosure protection grade (IP code)
General terms for positive displacement compressors
Determination of sound power level of positive displacement compressors Engineering method Basis for formulating mechanical vibration standards
Method for measuring vibration of small and medium power diesel engines
Measurement and evaluation of mechanical vibration of reciprocating piston compressors Noise sound power level limits for power air compressors and diaphragm compressors Vibration rating for medium and small power diesel engines
Positive displacement air compressor Intake filter and silencer Technical conditions for general use dry screw air compressors Technical conditions for general use fixed reciprocating piston air compressors Signage
1997-10-01 implementation
GB/T1392892
GB1471193
GB/T15706.11995
JB/T377192
JB/T4223
JB/T4253
JB/T6430
JB/T6441
JB/T6539
JB/T6905
JB/T6907
JB/T7662
ZBJ72013.2
ZBJ72014.2
ZBJ72025
3 Definition
JB8524—1997
Micro reciprocating piston air compressor
General safety requirements for small and medium-sized rotating electrical machines
Basic concepts and design principles for mechanical safety Part 1: Basic terms, methodology Technical conditions for chassis of mobile compressors||t t||Technical conditions for vehicle-mounted positive displacement air compressor units Oil-injected vane air compressors for general use
Oil-injected screw air compressors for general use
Safety valves for compressors
Steel pressure vessels for micro air compressors Diaphragm compressors
Technical conditions for motorcycle compressors
Terms for positive displacement compressors Rotary compressors Technical conditions for medium-pressure reciprocating piston air compressors for marine use Technical conditions for oil-free reciprocating piston air compressors Terms for reciprocating compressors
Terms for air compressors shall comply with GB/T4975, JB/T7662 and ZBJ72025, and those for mechanical safety shall comply with GB/T15706.1.
4 Safety requirements and/or measures and their inspection
4.1 General
The design, production, installation, maintenance, operation and acceptance of air compressors shall comply with the relevant product standards. 4.1.1 Micro reciprocating piston air compressors shall comply with the provisions of GB/T13928. 4.1.2
General fixed reciprocating piston air compressors shall comply with the provisions of GB/T13279: General oil-injected screw air compressors shall comply with the provisions of JB/T6430. 4.1.3
General oil-injected sliding vane air compressors shall comply with the provisions of JB/T4253. General dry screw air compressors shall comply with the provisions of GB/T13278: Diaphragm air compressors shall comply with the provisions of JB/T6905. Full oil-free reciprocating piston air compressors shall comply with the provisions of ZBJ72014.2. Motorcycle air compressors shall comply with the provisions of JB/T6907. 4.1.9 Marine medium-pressure reciprocating piston air compressors shall comply with the provisions of ZBJ72013.2. 4.1.10 Vehicle-mounted air compressors shall comply with the provisions of JB/T4223. 4.1.11 The main engine of the mobile air compressor shall comply with the provisions of the corresponding product standards, and its chassis shall comply with the provisions of JB/T3771. 4.2 Noise
4.2.1 The noise sound power level of the micro reciprocating piston air compressor shall comply with the provisions of Table 2 in GB7786-87: The noise sound power level of the diaphragm air compressor shall comply with the provisions of Table 5 in GB7786-87: 4.2.2
The noise sound power level of the general fixed reciprocating piston air compressor shall comply with the provisions of Table 3 in GB/T13279-91. JB8524-1997
4.2.4 The noise sound power level of general oil-injected screw air compressors shall comply with the provisions of Table 3 in JB/T643092: 4.2.5 The noise sound power level of motorcycle air compressors shall comply with the provisions of Table 1 in JB/T690793: 4.2.6 The noise sound power level of general thousand screw air compressors shall comply with the provisions of Table 1 in GB/T1327891 4.2.7 The noise sound power level of general oil-injected sliding vane air compressors shall comply with the provisions of Table 2 in JB/T425393, 4.2.8 The measurement of air compressor noise sound power level shall comply with the provisions of GB4980, 4.3 Mechanical vibration||t t||4.3.1 The mechanical vibration of reciprocating piston air compressor and diaphragm air compressor shall be tested according to GB7777, and the vibration intensity value shall not exceed the limit value specified in the standard:
4.3.2 The mechanical vibration of rotary air compressor shall be tested according to GB6075, and the vibration intensity value shall not exceed the maximum limit value of Class C specified in the standard.
4.3.3 The mechanical vibration of motorcycle air compressor shall be tested according to GB7184, and the vibration intensity value shall not exceed the maximum limit value of Class C specified in GB1039789:
4.4 Temperature control
4.4.1 Exhaust temperature and lubricating oil temperature
4.4.1.1 When the air compressor is running stably under the operating environment specified by the manufacturer and the final exhaust pressure is the rated exhaust pressure, the exhaust temperature of each level should meet the following requirements:
a) For air compressors with oil lubrication in the cylinder, the exhaust temperature of each level should not exceed 180℃. When synthetic oil is used for lubrication, the exhaust temperature of each level should not exceed 200"C;
b) For air compressors without oil lubrication in the cylinder, the exhaust temperature of each level should not exceed 200℃c) For oil-injected rotary air compressors, the exhaust temperature of each level should not exceed 11 0").4.4.1.2 For oil-lubricated air compressors, when the air compressor is operating stably under the operating environment specified by the manufacturer and the final exhaust pressure is the rated exhaust pressure, the lubricating oil temperature should not exceed 70.4.4.2 Over-temperature protection measures
Each exhaust stage of the air compressor with a driving power greater than 15kW should be equipped with an exhaust temperature over-temperature parking device, and the temperature sensing element should be installed on the pipe near the exhaust port before the aftercooler of each exhaust stage. The user manual of the air compressor and related technical documents should clearly indicate Normal exhaust temperature of the air compressor under rated working condition: The maximum parking temperature of the over-temperature parking device should be within 28C higher than the normal exhaust temperature, and the maximum should not exceed the maximum exhaust temperature limit specified in 4.4.1. After parking, it can only be reset manually: Before resetting, the air compressor shall not start automatically under any circumstances
4.4.3 Inspection of the sensitivity of the over-temperature protection device The sensitivity of the over-temperature parking device should be inspected three times, and each action should be correct. During the inspection, place the temperature sensing element in the oil bath, turn on the air compressor, heat the oil bath to slowly increase the oil temperature and stir it evenly. Use a rod-type mercury thermometer with a graduation value of no more than 0.5 or other temperature measuring instruments with the same accuracy to measure the oil temperature, and observe whether it stops within the temperature range specified in 4.4.2. After parking: let the oil temperature in the oil bath drop, manually reset the parking device, and repeat the above steps for the second and third inspections.4.5 Pressure control
4.5.1 The air compressor should automatically control the exhaust pressure so that when the exhaust pressure of the air compressor is higher than the rated value, the exhaust of the air compressor can be The controller setting value should be lower than the opening pressure of the pressure relief device on the air compressor tank. 4.5.2 The system components and equipment through which the compressed air flows should use pressure relief devices or other protective devices to prevent the pressure in the system components from exceeding 1.1 times the maximum working pressure specified by the manufacturer. A pressure relief device should also be installed between the air compressor exhaust port and the first valve. 4.5.2.1 In order to prevent leakage and unnecessary tripping of the pressure relief device, the opening pressure of the pressure relief device should be as high as possible, but not exceeding 10% of the working pressure of the system component it protects or 0.1MPa, whichever is greater. 4.5.2.2 The pressure relief device should be as close as possible to the system component to be protected and should not be separated by a valve. The release volume should ensure that the pressure of the system component does not exceed 1.1 times the maximum working pressure specified by the manufacturer under the maximum daily continuous air supply flow. 4.5.2.3 Enter the release The effective flow area of the pipes and connectors through which the air of the pressure relief device flows should not be less than the effective flow area at the inlet of the relief device.
4.5.2.4 No valve can be installed on the discharge pipe of the pressure relief device, and the size of the discharge pipe should not reduce the release capacity: 4.5.2.5 The released air should be discharged into the atmosphere as directly as possible, but the position of the pipe outlet to the atmosphere should not cause harm to the human body: When the reaction force of the pressure relief device discharge may cause excessive movement and vibration of the pipeline, the pipeline should be properly fixed. 4.5.2.6 The pressure relief device of the air compressor should give priority to spring-type safety valves: When the released flow is large, bursting discs can be used. 4.5.2.7 When bursting discs are used, the bursting pressure at a specific temperature should be indicated on the bursting discs. 4.5.2.8 The safety valve used on the air compressor should comply with the provisions of JB/T6441. 4.5.3 The sensitivity of the air compressor exhaust pressure automatic control device and all pressure relief devices should be tested three times (the bursting disc should be tested once), and each action should be correct.
4.6 Air Valves and Check Valves
4.6.1: To ensure the correct installation of the inlet and exhaust valves, the design of the air valve assembly and valve hole of the reciprocating air compressor should ensure that the inlet valve assembly and the exhaust valve assembly cannot be interchanged or inverted during installation. 4.6.2 All air compressors that may reverse after parking due to back pressure should be equipped with a check valve or other device on the exhaust pipe to prevent reversal.
The design of the check valve should ensure that the check valve will not be installed in reverse. 4.7 Lubricating Oil
4.7.1 For air compressors with oil lubrication, the oil storage container must be equipped with an oil sighting device (such as an oil sight glass, oil dipstick, etc.) to determine the oil level, and the oil sighting device must be marked with a permanent mark indicating the highest and lowest normal oil levels. 4.7.2 Air compressors with pressure lubrication (except oil-injected rotary air compressors) should have an oil pressure display instrument and an oil shortage alarm device or an oil shortage parking device. The minimum oil pressure should be clearly specified in the operating manual of the air compressor and related technical documents. When the actual operating oil pressure of the air compressor is lower than this value, an alarm should be sounded or the compressor should stop.
4.7.3 The sensitivity of the oil shortage protection device should be tested three times, and each action should be correct. 4.7.3.1 For adjustable oil pressure systems, the adjustment device can be used to slowly reduce the pressure to the minimum allowable oil pressure to test the sensitivity of the device: 4.7.3.2 For non-adjustable oil pressure systems, the pressure connector of the oil shortage parking device can be connected to the hydraulic pump, and the hydraulic pump can be pressurized to the rated oil pressure: turn on the air compressor, and then slowly release the hydraulic pump pressure to the minimum allowable oil pressure to test the sensitivity of the device. If the hydraulic pump pressure cannot be released slowly, a pressure vessel of appropriate volume can be connected. 4.8 Cooling water
4.8.1 For water-cooled air compressors, there should be a cooling water cut-off alarm or parking device. 4.8.2 The sensitivity of the water cut-off alarm or parking device should be tested three times, and each action should be correct. When the air compressor is operating normally, close the cooling water inlet, and the air compressor should immediately alarm or stop. 4
4.9 Protective device
4.9.1 Protective devices should be installed at the following positions of the air compressor: a) All moving parts that are dangerous to the human body: JB8524-1997
b) Parts (except cylinder parts) and pipes with a surface temperature exceeding 80"C that are easily touched by the human body during normal operation: c) Pipes that are easily approached by the human body and are arranged horizontally and cannot withstand a vertical load of 1.5kN; d) Pipes that may produce Where there is a high-pressure jet that is dangerous to the human body, 4.9.2 When the protective device adopts a protective cover, the following requirements shall be met: a) The protective cover shall be easy to disassemble and install:
b) The mesh size of the protective cover or the distance from the surface of the protected object shall ensure that anyone's finger cannot touch the protected object; c) The rigidity of the protective cover shall ensure that anyone leaning on the protective cover will not cause the protective cover to deform or move and cause the protective cover to touch the protected object.
4.9.3 When the protective device adopts an isolation fence, the following requirements shall be met: a) The height of the isolation fence shall ensure that no one can easily step in; b) The distance between the isolation fence and the surface of the protected object shall ensure that no one can touch the protected object when reaching out; c) The isolation fence shall be fixed and cannot be moved at will. The rigidity of the isolation fence shall ensure that anyone leaning on the isolation fence will not cause the isolation fence to deform excessively. , affecting the isolation effect,
4.10 Pressure vessels
4.10.1 The air storage tank of the micro air compressor shall be designed, manufactured and inspected according to JB/T6539.4.10.2 Other air compressor air storage tanks and air dryers, filters, pulse buffers and other pressure vessels in air compressor auxiliary equipment shall be designed, manufactured and inspected according to GB150
4.10.3 Independently installed shell and tube heat exchangers such as air compressor intercoolers and aftercoolers shall be designed, manufactured and inspected according to GB151. However, non-independently installed heat exchangers integrated with air compressors may not be subject to this restriction when the designer and manufacturer can ensure their safe use.4.11 Display instruments
4.11.1 Air compressors with a driving power greater than 20kW shall be equipped with an easy-to-read thermometer at each exhaust stage to display the temperature of each stage. Stage exhaust temperature?
4.11.2 The pressure gauge showing the compressed air pressure should be installed on: a) On the air tank
b) On the downstream pipe near the exhaust port of the last stage of piston, screw and vane air compressors with working pressure greater than 0.1MPa (except for non-stationary air compressors with a driving power of less than 15kW); c) On the downstream pipe near the exhaust port of each stage of diaphragm air compressors with working pressure greater than 0.3MPa; d) On the downstream pipe near the exhaust port of each stage of air compressors with a driving power greater than 20kW.4.11.3 Pressure lubricated air compressors should be equipped with a pressure gauge showing the lubricating oil pressure.4.11.4 The maximum range of the final stage pressure gauge should be 1.5~2 times the maximum working pressure value of the air tank: The scale unit on the pressure gauge should be consistent with the pressure unit used by the safety valve.
4.11.5 For pressure gauges affected by pressure pulsation, measures should be taken to ensure that the pressure gauge can determine the actual pressure value. 4.12 Intake system
4.12.1 The intake system of the air compressor should be able to prevent foreign objects that may damage the air compressor from entering the air compressor5
JB8524—1997
4.12.2 The performance of the intake silencer filter used in the intake system should comply with the provisions of GB/T132764.12.3 The intake system should be able to ensure that under full negative pressure, no changes will be caused. The shape and will not suck any material in the suction system into the air compressor, or be protected by a pressure differential controller. 4.13 Lifting
Air compressors and their parts weighing more than 45kg, unless their own shape is suitable for lifting, should be equipped with obvious lifting rings, lifting ears or lifting eye bolts, etc., or marked with obvious lifting positions. For air compressors with packaging boxes, the packaging boxes should also have obvious lifting position markings. The lifting marks of the packaging boxes should comply with the provisions of GB191. 4.14 Mobile air compressors
Mobile Mobile air compressors include vehicle-mounted or motor vehicle-towed air compressor units that travel on urban streets and highways. In addition to meeting the safety requirements of this standard, they must also meet the following safety requirements 4.14.1 The center of gravity of the mobile air compressor unit should be slightly behind the middle of the two wheelbases for a double-axle chassis; it should be slightly in front of the axle for a single-axle trailer chassis, so that the load on the rear hook of the towing vehicle is 50-100kg. Regardless of the type of chassis, it should be ensured that the center of gravity does not fall outside the rear axle when climbing the maximum grade.
4. 14.2 The mobile air compressor should have an effective braking device. 4.14.3 The design of the mobile air compressor should ensure that the vibration will not cause the chassis to move when the air compressor is running. 4.14.4 The chassis of the mobile air compressor should have signal devices such as steering indicators, brakes and parking. 4.15 Electrical
4.15.1 For air compressors driven by motors: the motors should have good insulation performance. 4.15.1.1 When the motor is working normally, its contact current should comply with the provisions of 7.1 of GB1471193. 4 .15.1.2 The insulation resistance of the motor winding shall comply with the provisions of 8.1 of GB1471193. 4.15.1.3 The contact current and insulation resistance of the motor shall be tested according to the method specified in GB14711: 4.15.2 For air compressors driven by motors: The electronic control equipment shall have good insulation performance 4.15.2.1 Conduct a withstand voltage test on the live parts of the electronic control equipment and the metal shell parts that are easily touched by the human body. The voltage waveform of the test power supply is a sine wave with a frequency between 45~62Hz , the test voltage shall comply with the following provisions: a) When the rated voltage (U) of the electric control equipment is not greater than 12V, the test voltage (effective value) is 250V: b) When the rated voltage (U) of the electric control equipment is greater than 12V but not greater than 60V, the test voltage (effective value) is 500V c) When the rated voltage (Ui) of the electric control equipment is greater than 60V, the test voltage (effective value) is 2U, +1000V and the minimum is 1500V..
4.15.2.2 The applied voltage shall be from 0. 30.5 times the test voltage, then gradually increase the voltage to the specified test voltage value within about 10 to 30 seconds, and maintain it at this value for 1 minute, then gradually reduce the voltage to zero and cut off the power supply. 4.15.2.3 The electric control equipment should not have breakdown or flashover during the withstand voltage test. 4.15.2.4 Before and after the withstand voltage test, the insulation resistance between the live parts of the electric control equipment and the metal shell that is easily touched by the human body should be measured with a megohmmeter with the same rated voltage specification as the electric control equipment. The value shall not exceed 4.15.3 For air compressors driven by electric motors, the enclosure protection level of the electronic control equipment shall be tested in accordance with the method specified in GB4208 and shall meet the IP2X level requirements specified in GB4208.
5 Usage information
5.1 General requirements
JB8524—1997
5.1.1 The air compressor manufacturer shall provide detailed usage information when providing the air compressor so that the user can safely operate, use and maintain the machine according to this information.
5.1.2 Usage information shall be given in the form of nameplate, logo and instructions for use. 5.2 Nameplate
5.2.1 Each air compressor shall have a nameplate fixed on a conspicuous and flat position. The size and technical requirements of the nameplate shall comply with the provisions of GB/T13306. The nameplate shall at least give the following information: a) Product model and product name:
b) Nominal volume flow, m/min;
c) Suction pressure, MPa (only applicable to booster air compressors): d) Rated exhaust pressure, MPa:
e) Shaft power, kW:
f) Speed (screw air compressor is the active rotor speed), I/min: g) Overall dimensions (length × width × height), mm: h) Net weight, kg:
i) Manufacturer name and manufacturer On-site
ji) Factory number:
k) Factory year and month,
5.2.2 Pressure vessel equipment such as gas storage tanks should be equipped with independent nameplates, which should at least give the following information: a) Pressure vessel name and category:
b) Manufacturer name and license number: c) Design pressure, MPa:
d) Design temperature: ℃:
e) Maximum working pressure: MPa:
f) Maximum allowable working pressure (MPag when necessary) Net weight, kg:
h) Manufacturing date and number:
i) Pressure vessel supervision department mark,
5.2.3 Other major independent components of the air compressor, such as safety valves and other independent valves, dryers and independent coolers, etc., should also be equipped with corresponding nameplates.
5.3 Signs
5.3.1 The signs should be obvious, and the text and patterns should be clear. The power input side of the air compressor should be nailed or cast with a turn arrow or sign. 5.3.2
5.3.3 Automatic or remote-controlled air compressors should be provided with a warning sign when leaving the factory, which should be marked: JB8524-1997
Remote-controlled compressor, start without notice
5.3.4 If the outer surface temperature exceeds 80℃, but the pipes and parts that are not easily touched by the human body during normal operation are not properly protected, a warning sign should be set:
5.3.5 The protective grounding graphic symbol "" should be marked near the protective grounding terminal of the motor and the protective grounding terminal of the electronic control equipment. If necessary, the letter symbol "PE" should be applied. These marks should be securely fixed. 5.4 Instructions for use
The documents provided by the air compressor manufacturer should include detailed instructions for use, which should include instructions for normal installation, operation, maintenance and overhaul of the air compressor. Depending on the model, the following relevant contents must be included: 5.4.1 Start-up
The following procedures should be followed when the air compressor is started up for the first time or when the air compressor and its system equipment are restarted after overhaul: a) Check whether all valves are in the appropriate position and opened and closed correctly. status: b) Remove all maintenance accessories (such as blind plates) and maintenance signs installed for safety maintenance: c) Check the system and remove foreign objects inside it: d) Open and close the drain valve again
e) Turn the engine at least one circle to ensure that there is no mechanical interference: f) Ensure that the rotation direction of the driving machine and rotating equipment is correct: g) Check and make sure that all safety protection devices are in proper operating conditions: h) Observe whether the engine is burning normally. If not, stop the engine immediately and perform the maintenance work in 5.4.2 Maintenance
5.4.2.1 Some maintenance work requires the vehicle to be stopped: 5.4.2.2 When repairing the air compressor, a sign should be placed on the starting device, which should read: "Warning: Under maintenance: Do not start the vehicle". At the same time, one or more of the following measures should be taken to disconnect the air compressor to avoid starting the air compressor due to negligence or accident: a) Pull out the fuse and lock the fuse box cover: b) Use a locking mechanism to lock the power switch in the disengaged position: c) Remove the engine ignition device:
d) Disconnect the coupling or other transmission mechanism between the air compressor and the driver. 5.4.2.3 When disassembling the pressurized parts of the air compressor and auxiliary equipment, they should be isolated from the pressure source and all the compressed air inside should be discharged into the atmosphere.
5.4.2.4 The crankcase of the air compressor should be opened at least 15 minutes after the compressor is shut down. 5.4.3 Inspection and cleaning
The manufacturer should provide the inspection and cleaning cycle of various equipment and parts: or explain when this work must be done. 5.4.3.1 The pressure release device, parking protection device and alarm device of the air compressor should be inspected regularly to ensure that they are in normal working condition. 5.4.3.2 For oil-lubricated air compressors, the air tank, cylinder, pulse buffer, exhaust pipe and aftercooler and other heat and heat transfer equipment and parts should be checked regularly to remove oil stains and carbon deposits. JB8524-1997
5.4.3.3. The air valves, filters, air cavities, air pipes and other parts that come into contact with compressed air under normal conditions should be cleaned regularly. Volatile, flammable cleaning agents or cleaning agents that are harmful to the human body should not be used for cleaning under any circumstances. After cleaning, all parts should be rinsed and blown dry.
5.4.3.4 For pressure vessels, the requirement for regular pressure resistance test should be given: the inspection cycle should be at least once every 10 years. 5.4.4 Lubricating oil
The air compressor manufacturer should give the recommended lubricating oil brand and oil filling amount, and specify the lubricating oil addition requirements and replacement period. For pressure lubricating air compressors, the normal oil pressure and minimum oil pressure should also be given. 5.4.5 Temperature
The air compressor manufacturer should give the maximum ambient temperature allowed for the air compressor, and the normal exhaust temperature and lubricating oil temperature of the air compressor under rated working conditions.
5.4.6 Others
5.4.6.1 Before driving a mobile air compressor, the air tank should be depressurized. Before starting, measures should be taken to prevent displacement of the machine during operation. 5.4.6.2 Before moving a micro air compressor, the air tank should be depressurized. Before starting, the air compressor should be placed stably or the rubber wheels should be fixed to prevent vibration from causing displacement of the machine:
5.4 .6.3 All protective covers, warning signs and other safety protection devices should be checked regularly. 6 Determination of the safety performance of air compressors
6.1 After the air compressor has been inspected and qualified according to the corresponding product standards, it shall be inspected for safety performance according to this standard. 6.2. The following safety requirements of the air compressor are key items. If one of them fails to meet the requirements or the actual operation is incorrect, the air compressor will be judged to have unqualified safety performance:
a) Noise;
b) Vibration:
c) Exhaust temperature and lubricating oil temperature at all levels:
e) Various alarm devices and parking devices:
f) Various pressure control and pressure release devices:
g) Protection of exposed rotating parts and high-pressure jet hazards:
i) Display instruments:
i) Braking, anti-rolling and lateral displacement, center of gravity of mobile air compressors:
1) Electrical requirements.
6.3 Other safety requirements specified in this standard are the main items. Air compressor manufacturers should implement them as completely as possible. To determine that the air compressor safety performance is qualified, 90% or more of the main items must meet the requirements of this standard. 6.4 Appendix A (Appendix to the standard) is a list of typical air compressor safety performance inspections. During actual inspections, this list should be added or deleted according to different models.
Exhaust temperature
First-stage exhaust temperature
Second-stage exhaust temperature
Lubricating oil temperature
Over-temperature protection measures
First-stage exhaust over-temperature parking devicewwW.bzxz.Net
Second-stage exhaust over-temperature parking device
Lubricating oil over-temperature protection device
Pressure control
Exhaust pressure automatic control device
Safety valve of gas storage tank
Safety valve of intercooler
Gas valve and check valve
Inlet and exhaust valves
Check valve
Lubricating oil
Oil pressure gauge| |tt||Oil shortage protection device
Cooling water cut-off protection device
Protective device
Moving parts protection
High-pressure jet protection
Pressure vessel
Display instrument
Suction system
Motor contact current
Motor insulation resistance
JB8524—1997
Appendix A
(Appendix to the standard
Typical air compressor safety performance inspection list Table A1
Standard requirements
Actual inspection results
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