Some standard content:
7
Mechanical Industry Standards of the People's Republic of China
Electric Chain Hoist
Technical Conditions
Theme Content and Applicable Range
JB 5317. 2— 91
This standard specifies the main technical requirements, test methods and inspection rules for electric chain hoists (hereinafter referred to as chain hoists), as well as marking, packaging, transportation and storage requirements.
This standard applies to general-purpose chain hoists, and their organizational working levels should comply with the provisions of JB5317.1. For special-purpose chain hoists, the single-phase power supply and voltage do not comply with the provisions of Article 3.1.1. Chain hoists with a rated frequency of 60Hz may also refer to this standard.
2
Quoted standards
GB 191
GBn 193
GB699
GB700
GB755
GB1032
GB1173
GB1222
GB1239
GB1764
GB3077
GB3811
GB4829
packaging storage Shipping icon mark
General technical conditions for export machinery, electrician, instrumentation product packaging Technical conditions for high-quality carbon structural steel
Carbon structural steel
Basic technical requirements for rotating electrical machines||tt ||Three-phase asynchronous motor test method
Technical conditions for cast aluminum alloy
Spring steel
Cylindrical spiral spring
Paint film thickness measurement method
Alloy structure Steel Technical Conditions
Crane Design Specifications
General Acceptance Principles for Short Link Chains for Lifting
GB4942.1
GB 4942.2
GB5802
GB6067 | |tt | and other lifting equipment T (8) level calibration chain hoisting machinery safety regulations
Method for determination of average grain size of metals
Paints and varnishes
Gray iron castings|| tt |
ZBJ80013.2 Technical conditions for wire rope electric hoist ZBJ80013.3 Conical rotor motor for wire rope electric hoist ZBJ80013.4 Test method for wire rope electric hoist Ministry of Mechanical and Electronics Industry of the People's Republic of China 1991-07-03 Approved 1992-07-0T Implementation
151
JB5317.2-91
ZBJ80013.6 Wire rope electric hoist electrical control equipment acceptance technical conditions JB8 Product labeling
JB2759 General technical conditions for mechanical and electrical product packaging JB /T5317.1 Types and basic parameters of electric chain hoist JB5317.3 Conical rotor motor for electric chain hoist 3 Technical requirements
3.1 Basic requirements
3.1.1 Rating of the main circuit of the chain hoist The voltage is three-phase AC 380V, the rated frequency is 50Hz, the working environment temperature is -25~+40℃.
3.1.2 The protection level of the motor, electrical devices and push button switches of the chain hoist should comply with the requirements of IF54 in GB4942.1 and GB4942.2.
3.1.3 For chain hoists used to lift fragile, dangerous and valuable items, the working level of the lifting mechanism should be appropriately increased and necessary safety protection measures should be added,
3.1.4 The chain hoist should be equipped with a chain guide frame. When the lifting hook is raised and lowered, the lifting chain should be able to pass freely through the chain guide frame, and there should be no chain jamming or chain climbing.
3.1.5 The mechanical properties of the lifting hook should comply with the regulations of GB10051.1 according to the working level of the organization. 3.1.6 The breaking load of the reducer body should be at least 8 times the rated load. 3.1.7 The breaking load of the hook shell should be at least 5 times the rated load. 3.1.8 Lifting chains should comply with the provisions of Appendix A (Supplement). 3.1.9 The reducer must not have oil leakage.
3.1.10 The accuracy of the reducer gears of the lifting mechanism and operating mechanism should be at least not lower than level 7-8-8 in GB10095; the accuracy of the open meshing gear should not be lower than level 9.
3.1.11 The nominal working pressure of the compression spring of the brake should comply with the level 2 accuracy in GB1239. 3.2 Performance
3.2.1 The type and basic parameters of the chain hoist should comply with the regulations of JB/T5317.1. 3.2.2 Performance parameters and technical requirements of lifting and running motors. Conical rotor motors should comply with the regulations of JB5317.3. 3.2.3 The performance and technical requirements of electrical devices and push button switches (flash door) should not be lower than those specified in ZBJ80013.6. 3.2.4 Under rated voltage, rated frequency and no-load conditions, the axial movement of the lifting motor shaft should be maintained within the range of 0.6~~1.5mm.
3.2.5 Under rated voltage, rated frequency and rated load, the limit deviation of lifting speed is ±5% of the nominal value. 3.2.6 Under rated voltage, rated frequency and rated load, the limit deviation of the electric car's operating speed is ±10% of the nominal value. 3.2.7 Lifting height of the lifting mechanism. It refers to the maximum distance that the rated load can be lifted and lowered. The lifting height should not be less than the nominal value. 3.2.8 Under the rated load, the braking sliding amount S≤V/100 (V is the stable lifting distance of the load within 1 minute.mm). 3.2.9 Under the conditions of the rated load and the motor terminal voltage being 90% of the rated voltage, there should be no abnormality in the operation of the motor and brake, that is, the conical rotor motor has residual magnetic pull. 3.2.10 When the lifting mechanism is subjected to a static load test, it should be able to withstand a test load of 1.5 times the rated load. After visual inspection after the test, each stress-bearing part should be free of cracks, permanent deformation and paint peeling, and all connections should be free of looseness and oil leakage. 3.2.11 Under the conditions of rated voltage and rated frequency, the lifting mechanism should be able to withstand a test load of 1.25 times the rated load when performing a dynamic load test. During the test, it should work normally and brake reliably. The requirements for visual inspection after the test are the same as those specified in Article 3.2.10. 3.2.12 When running the trolley for static load test, it should be able to withstand a test load of 1.50 times the rated load. The requirements for visual inspection after the test are the same as those specified in Article 3.2.10.
3.2.13 Under rated voltage, rated frequency and rated load, when an electric car is doing a slope test on a track with a slope of 1/200, it should be repeated to 152
n
Operating normally.
3.3 Safety and health
JB 5317.2—91
3.3.1 The lifting hook should have a locking device to prevent the rigging from accidentally slipping off. 3.3.2 The lifting mechanism should be equipped with a safety clutch and should slip under (1.3~~1.6) times the rated load. The safety clutch should not be used as an overload limiter.
3.3.3 The chain hoist should be equipped with a limit device. When the lifting hook is raised to the highest position, it should be able to automatically terminate the movement of the lifting hook. 3.3.4 The normal temperature insulation resistance value of the live part of the chain hoist to the metal of the non-live part is not less than 1.5M0. 3.3.5 The grounding connection resistance value is not more than 0.12. 3.3.6 Noise
a. Lifting mechanism: rated When the load is less than 1t, the noise should not be greater than 82dB(A): when the rated load is greater than or equal to 1t, the noise should not be greater than 85dB(A);
b. Operating mechanism: When operating under no load, the noise should not be greater than 80dB(A). 3.3.7 Withstand voltage
a. When the product leaves the factory, the insulation resistance at room temperature is measured first, and then the withstand voltage is measured; b, withstand voltage test value Ut: U.=2UH+1000V; where: Uu——rated voltage, 380V. The repeated voltage test shall be in accordance with Article 6.2.3 of GB755. c. The withstand voltage time should last for 1 minute, and there should be no insulation breakdown after the test. 3.4 Reliability and lifespan
3.4.1 The lifting mechanism shall be based on the designed working level of the mechanism and the nominal load spectrum coefficient m-1.00 apply rated load and perform cyclic lifting motion. When the lifting speed is single speed, the test running time is the total service life () corresponding to the working level of the lifting mechanism. When the lifting speed is double speed, the fast running time is the same as the running time when the lifting speed is single speed, and the slow running time is The running time shall not be less than half of the fast running time [see Table C3 in Appendix C (Supplement)]. After the test, all worn parts can still be used (except the lifting chain), and the noise of the lifting mechanism is not greater than 85dB (A). 3.4.2 The temperature rise of the motor stator winding should comply with the regulations in ZBJ80013.3. 3.4.3 During the life test, no parts shall be replaced except the lifting chain. 3.5 Materials
3.5.1 When the reducer body and hook housing are made of cast aluminum alloy, its material properties should be no less than ZL104 in GB1173, alloy state T.
3:5.2 The material of the lifting hook should not be lower than the P-level strength level requirements in GB10051.1. 3.5.3 The material of the hoisting mechanism reducer gear should have properties no less than 45 steel in GB699; the material of the running mechanism reducer gear should have properties no less than 45 steel in GB699; the material of the open meshing gear , its performance should be no less than 45 steel in GB699. All gears should be heat treated and strengthened.
3.5.4 When steel plates and profiles are used to manufacture the machine body, hook shell, trolley wall panel and other important stress-bearing parts, when the specified working environment temperature is -25~+21C, its performance should not be lower than Q235-D.TZ in GB700, and the low temperature impact energy should not be less than 27J. 3.5.5 The materials of forged wheels, lifting rings and hanging shafts should not be lower than the performance of 45 steel in GB699. 3.5.6 For materials of lifting chains, see Appendix A. 3.5.7 The performance of the material of the lifting sprocket should not be lower than 20CrMnTi in GB3077. After heat treatment, the hardness should not be lower than 52HRC. 3.5.8 When the material of the lifting cruise ship is made of metal, its performance should not be lower than 45 steel in GB699 and has been heat treated, and the hardness should not be lower than 50HRC
3.5.9 The material of the chain end latch, its The performance should not be lower than 30CrMnSiA in GB3077. 3.5.10 The performance of the materials used for chain guide plates and chain dividing plates should be no less than 60Si2MnA in GB1222, and after heat treatment, the hardness should be no less than 50HRC.
3.5.11 Cast iron material, its performance should not be lower than HT200 in GB9439. 153
3.6 Painting and appearance
JB 5317.2-97
a. Electric chain hoists should be painted before leaving the factory. When applying primer and frying, the substrate should be sandblasted and surface treated. The primer should be applied first and then the topcoat. The thickness of each paint film after drying should be no less than 25um. The total thickness of the paint film: steel parts and cast iron parts shall not be less than 75 μm; aluminum parts shall not be less than 50 μm. The paint should be evenly coated, smooth, consistent in color, and there should be no paint leakage. Anti-rust measures should be taken for exposed processed surfaces that are not painted (or plated) b. Use the cross-hatch method to check the paint film adhesion of the paint layer, and check at least 2 places each on the wall panel, machine body and cast iron end cap. The peeling performance of the paint film at the cutting point should be no less than level 2 according to GB9286. 4 Test methods
4.1 Basic requirements for testing
4.1.1 Requirements for test power supply
The test power supply is three-phase AC, with a rated voltage of 380V and a rated frequency of 50Hz. The sinusoidal distortion rate of the voltage waveform should not exceed 5%, and the difference between the frequency of the test power supply and the rated frequency should be within the range of ±1% of the rated frequency. 4.1.2 Requirements for testing instruments and measuring tools
Testing instruments and measuring tools should be qualified and within the calibration period. The accuracy and range should be selected to meet the technical requirements of the device under test. The specific requirements are as follows:
a.
The accuracy of the voltmeter should not be less than 0.5 level: h.||tt ||The accuracy of the ammeter should not be less than 0.5 level
c.
The accuracy of the wattmeter should not be less than 0.5 level+d.
Digital revolution measurement The accuracy of the instrument and slip measuring instrument should not be less than 0.1%, soil 1 Yu; e.
The accuracy of the torque measuring instrument should not be less than 1%; the accuracy of the dynamometer Should not be lower than level 1.0; f.
The accuracy of the thermometer is ±1C;
g
h.
The inference accuracy of the magnetic code is ±0.5%;| |tt||i.
When selecting an instrument, the measured value should be within the range of 20% to 95% of the instrument range: When measuring three-phase power using the two-wattmeter method, the measured voltage should be The current value shall not be less than 20% of the voltage range and current range of the wattmeter respectively. 4.1.3 The test bench should be able to meet the requirements of various measurements and be able to display or automatically record relevant parameters respectively. 4.1.4 Measurement requirements
a.
b.
measurement;
c.
measurement value;
used during testing The temperature of the measuring tool and the part under test should be basically the same; the three-phase current can be measured with three current transformers and three ammeters; the three-phase power can be tested with the two-wattmeter method or a special device. When testing, the readings of each instrument should be read at the same time. When measuring three-phase voltage or current, the average of the three-phase readings should be taken as the actual sound level meter. Before measurement, a precision sound level meter with an accuracy of O.5dB should be calibrated. d.
4.1.5 Accurate requirements before testing
a. According to the requirements of the test items, check whether the test site and the installation of circuits, instruments and various equipment meet the test and related safety requirements;
b. Test work should be carried out by full-time personnel. 4.2 Test content
4.2.1 Factory test
4. 2. 1. 1
General inspection
a Product structure, specifications and models, power supply and performance parameters Whether it meets the requirements, the number of adjustment washers when running the trolley; insulation check; use a 500V megohmmeter to check the insulation resistance at room temperature, it should not be less than 1.5M2; b.
Grounding situation: Whether the grounding screw is tightened and grounded Check whether there are paint and rust marks on the connection, whether there is a grounding mark, and the grounding resistance value should be c.
154
not greater than 0.1Q;
d.
e.
f.
g.
JB 5317.2—91
Whether the chain end of the lifting chain is firmly fixed and whether it is installed correctly; the installation quality of the chain guide frame: check the installation position and screws, the chain should be able to pass smoothly through the chain guide frame: reducer: whether the shaft has been injected, and whether there is oil leakage; hook assembly: whether the locking device is reliable, and the hook should be able to rotate 360 ??degrees in the horizontal plane when rotated by hand ° Unimpeded rotation; Appearance coating quality: It should be evenly smooth and consistent in color, and there should be no leakage of paint; h.
i.
signs: whether they are complete and correct, the position of the signs and whether they are firmly adhered, Rivet firmly. 4.2.1.2 No-load test
Under rated voltage and rated frequency, perform no-load operation on the test stand, lift the lifting hook for at least two cycles, and conduct the following tests: ||tt| |a.
Record the voltage and current of each phase;
The operating status of the lifting chain: whether there is chain jamming, chain climbing and other abnormal conditions; b.
Upper and lower limit actions: The lifting hook should be able to stop the movement in time; c.
d.
The axial movement of the lifting motor shaft: when the lifting mechanism is inching, the motor shaft should maintain a distance of 0.6~~1.5mm Axial movement; no-load noise of the electric trolley: Place the electric trolley on the ground plane or platform, and run with power under no load: 1m away from the sound source on the horizontal plane, and at 4 measuring points 90° apart , measure the noise once each with a sound level meter, and take the maximum measured value. 4.2.1.3 Rated load test
Carry out the following tests on the test stand under the conditions of rated voltage, rated frequency (except voltage reduction test) and test load as rated load.
4.2.1.3.1 Voltage reduction test: After adjusting the lifting motor terminal voltage to 90% of the rated voltage (342V), lift the load in the air 3 times with a total stroke of about 2m, and slowly lift 1 About 1m each time. 4.2.1.3.2 Determination of brake sliding amount
Use a steel wire rope with a diameter of about 1mm, one end is tied to a heavy bowl, and the other end is connected to a micro switch with a normally closed contact. The normally closed contact is controlled by a contactor In the descending circuit, the mass of the heavy snake should be enough to cause the switch to operate and cut off the descending circuit. When measuring, place the heavy snake on the load (base code). When the load drops to a certain position, the weight is separated from the load. At this time, the descent circuit is immediately cut off, and the hook begins to slide downward. The vertical distance between the weight bowl and the load is measured, which is the braking sliding amount. Repeat the test 3 times and measure 3 times, and take the average value of the actual measurement. 4.2.1.3.3 Noise measurement of lifting mechanism
The chain hoist is installed on the indoor test bench. When measuring, the maximum overall size of the whole machine is used as the starting point for distance measurement. The measuring points are arranged on parallel lines extending 1m outward from the starting point, as shown in Figure 1. The measuring points are shown in Figure 1, with a total of 5 points. The measuring point should be no less than 1m away from the reflective surface (wall, column) and other objects, and no less than 2m away from the corner. When measuring, use a sound level meter to measure the background noise at each measuring point according to the A-level reading, and then measure the lifting mechanism noise point by point. When measuring, the peak value of the pulse sound is excluded. When the difference between the measured value and the background noise is within the range of 3-~10dB(A), the test value should be corrected. The correction value K is shown in Table 1. The noise of the hoisting mechanism of the chain hoist is calculated according to formula (1): LpA=10 Ig［
Wherein: LPA
Average noise of the measuring surface, dB(A)
LPAi--the noise measured at the ith point, dB(A); K.-the background noise correction value at the ith point. dBA)
N-the total number of measuring points.
Note: ①When the variation range of (LpA-Ki.) does not exceed 5dB(A), the arithmetic mean can be used instead of the energy mean. At this time, Lp=The calculation error is not greater than 0.7 dBA).
②) When the difference between the measured noise value and the background noise value is less than 3dB(A), the test value is invalid. l
(Lpa.-Ki;). Its
155
3
The difference between the measured noise and the background noise
K
3
3
JB 5317.2—91
@
Figure 1
Table 1
45
2
4.2.1.3.4 Record the current and voltage (for type test, the power should also be recorded). 4.2.1.4 Dynamic load test
6～8
1
g~10
0.5
dB(A)www.bzxz.net
>10
0
Under the conditions of rated voltage, rated frequency and test load of 1.25 times the rated load, carry out three reciprocating lifting tests on the test stand, and the lifting start in the air shall not be less than 3 times. The fast stroke is about 2m each time, and the slow stroke is about 1m each time. 4.2.1.5 Safety clutch slip test
Under the conditions of rated voltage and rated frequency, first start the lifting mechanism with rated load: when the rated load is less than 1t, operate for 30s; when the rated load is greater than or equal to 1t, operate for 60s, and then adjust the safety clutch. When the test load is 1.3~1.6 times the rated load, the safety clutch should be able to work, causing the lifting mechanism to slip and the lifting hook to stop moving. If the lifting button of the flashlight switch is pressed 2~3 times with a finger, the lifting should fail.
4.2.1.6 Withstand voltage test
When the chain hoist passes the normal temperature insulation resistance test, a withstand voltage test is carried out between the lifting motor winding and the motor end cover. The test voltage value is 2Ui.+1000V (when the rated voltage UH is 380V, the test voltage value is 1760V), and the power-on time lasts for 1min. After the test, there should be no insulation breakdown.
4.2.2 Type test
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JB5317.291
In addition to the factory test items, the following items should also be tested for the chain hoist complete machine test items. 4.2.2.1—General inspection
a.
b.
Measure the overall dimensions: measure the length, width and height according to the product drawing. Measure the minimum hook spacing: after lifting the lifting hook to the upper limit position, as shown in Figure 2, test according to the structural type of the chain hoist to be tested. The dimension measured by the steel tape measure during measurement is the measured minimum hook spacing. Middle
Figure 2
157
.-....
+..rr-
:
c. Measure the lifting height
JB 5317.2-91
Under rated voltage, rated frequency and rated load, measure the distance between the upper limit position and the lower limit position of the lifting hook when the lifting load is at the upper limit position and the lower limit position. The actual measured value should not be lower than the nominal value of the lifting height. The lifting height is shown in Figure 2. It is obtained by formula (2): H-Imax —C
Wherein: H-—·
Lifting height, m
Lmax
The maximum distance from the inner side of the lifting hook to the upper hook (ring), m: c
Minimum hook spacing, m.
4.2.2.2 Static load test
a.
According to the specified test load, gradually and slowly load to 1.5 times the rated load; (2)
The load is 100~200mm above the ground and the suspension time shall not be less than 10min. Unload and start visual inspection. It should meet the requirements of 3.2.10 b.
. When the trolley is running, the trolley can also be tested separately. During the test, install the trolley on a stable and hoistable track. Install a sling on the sling shaft of the trolley (the weight of the sling is not counted). Carry out the loading test and inspection according to the requirements of Article 3.2.12. 4.2.2.3 Dynamic load test
According to the requirements of Article 3.2.11. Determine the dynamic load test cycle according to Table C2 in Appendix C and determine the operation mode according to Table C3 in Appendix C. The test duration shall not be less than 1 hour;
a.
b. During the test, start in the air each time; c. For the chain hoist with an electric trolley, the trolley operation time shall not be less than 10 minutes. After the test, the inspection shall meet the requirements of Article 3.2.10.
4.2.2.4 Determination of lifting speed
Measure at rated voltage, rated frequency and rated load. Use two steel wires with a diameter of about 0.5mm, and fasten their ends to a vertical pole with a chassis on the ground with a certain weight. The steel wire is at a certain position (>30mm) from the lifting chain, and does not hinder the lifting and lowering movement of the lifting chain. The distance between the two fastened steel wires should be measured in advance, and it is best that the lower steel wire is about 0.5m from the ground. Use a stopwatch to measure the time it takes for the lifting hook to pass through the two steel wires when lifting, and calculate the lifting speed. Measure 4 times and take the average value. 4.2.2.5 Electric trolley test
4.2.2.5.1 Test running speed
Test on the track at rated voltage, rated frequency and rated load. The track should be straight and the track length should not be less than 4m. During the test, make obvious marks on the two ends of the track that are not less than 2m apart. When the electric trolley runs normally to the mark, use a stopwatch to time it immediately, and stop the timer immediately when it runs to the other mark, and calculate the running speed. Repeat the test 4 times and take the average value. 4.2.2.5.2 Climbing test
Under rated voltage, rated frequency and rated load, the electric trolley reciprocates 3 times on a track with a slope of 1/200, and each one-way stroke is at least 2m. It should work normally. If the test is conducted on a horizontal track, a force should be applied in the opposite direction of the operation, and its magnitude should be equal to 1/200 of the sum of the mass of the chain hoist and the rated load. 4.2.2.6 Lifting and running motor test, and determination of the residual magnetic pull of the motor under reduced voltage conditions shall be carried out in accordance with the provisions of JB5317.3. 4.2.2.7 Lifting motor temperature rise test
This test is carried out under rated voltage, rated frequency and rated load. After the temperature rise of the lifting motor is stable, measure its temperature rise value. The test is carried out according to the cycle specified in Article 4.2.2.3 of this standard. In order to shorten the test time, this test can be carried out after the dynamic load test, and the test load is changed to the rated load. The test is continued according to the specified cycle until the temperature no longer rises, and the temperature rise value is measured. The determination method is carried out in accordance with the relevant provisions of Chapter 8 of GB1032. 4.2.2.8 Temperature rise test of running motor
The temperature rise test of running motor is carried out by the inertia wheel method, and is carried out in accordance with the relevant provisions of Chapter 8 of GB1032. The test cycle is determined by the duty cycle (F) and the number of starts per hour (times/h) of the motor. The calculation method of equivalent load (inertia wheel) is shown in Appendix B (supplement). 158
JB 53 17. 2— 91
Note: When testing the trial production of new products, the temperature rise of the lifting motor should be measured at various working levels of the mechanism, and the temperature rise of the running motor should be measured at different duty cycles (F).
4.2.2.9 Measure the starting time and braking time of the lifting motor. The lifting mechanism starts from the beginning to normal operation, and starts braking after normal operation until it stops. Use an instrument to record the starting time and braking time.
4.2.2.10 The control box and flashlight door shall be inspected in accordance with the relevant provisions of ZBJ80013.6. 4.2.2.11 Inspection of protection level
Inspection shall be carried out according to the requirements in GB4942.1 and GB4942.2. 4.2.2.12 Appearance coating quality
a. Paint film thickness: According to the provisions of GB1764, use a paint film thickness checker to measure, no less than 6 points + 2 points each on the wall panel, machine body and cast iron end cover.
b. Paint film adhesion: According to the provisions of (GB9286), use special tools to cut no less than 6 places, that is, check 2 places each on the wall panel, machine body and cast iron end cover. The cutting tool blade spacing is 2mm, and the number of cuts is 6. The cutting surface coating is allowed to have a small amount of flakes falling off, and the falling surface should not be lower than level 2 according to the evaluation regulations in GB9286
4.2.2.13 Inspection of main parts
a: Lifting. Chain: According to the provisions of Appendix A of this standard: b. Lifting hook; inspect according to the corresponding requirements of GB10051.1; c. Reducer gear: use special instruments and tooling to inspect the three tolerance group items of the gear accuracy. It is specified in GB10095, but it should be clear that the core items of each tolerance group I and II are △F, △f and △/, △F respectively. 4.2.3 Life test
should be carried out on a dedicated test stand. . The test bench should be able to automatically perform the test cycle and record the number of starts and operating time. The load does not fall to the ground during the test.
Note: The operating time is used to adjust the test load position during the test. , excluding human test operation time. 4.2.3.1 Lifting mechanism life test
4.2.3.1.1 Under rated voltage, rated frequency and rated load, apply the rated load according to the nominal load spectrum K.-1. The periodic operation test of the mechanism should meet the requirements of Article 3.4 of this standard. The test operation time is the total service life hours corresponding to the working level of the lifting mechanism. .), number of power connections per hour (times/h) and cycle period, operating cycle and life test load, operating mode and operating hours are as specified in Table C1, Table C2 and Table C3 in Appendix C respectively 4.2. 3.1.2 During the test period, normal maintenance should be carried out according to the product instructions, and the following tests should be performed: a. After running for 1h, 50h, 200h, 400h, 600h, and 800h, respectively test and record the noise and braking slippage; The oil should be changed at 50h;
b.
After running for 200h, 400h, 600h, and 800h, disassemble and inspect the motor and reducer respectively, and check the following items: c
Motor gas Gap, stator and rotor scratches;
The sealing condition of motors, reducers: brake rings, brake wheels, bearings, gears; wear and tear of lifting chains, sprockets, cruise ships, and chain guide plates; reducer Breaking test of the body and hook shell (done after all tests are completed). 5 Inspection rules
The inspection of the chain hoist is divided into factory inspection, type inspection and life test. The test method should comply with Chapter 4 of this standard. 5.1 Factory inspection (see Article 4.2.1)
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