Some standard content:
ICS75.180.10
Registration No.: 6844--2000
Petroleum and natural gas industry standard of the People's Republic of ChinaSY/T50302000
Series 190 diesel engine for the petroleum and natural gas industry2000-03-10 issued
State Bureau of Petroleum and Chemical Industry
2000-10-01 implementation
SY/T5030—2000
Cited standards
Product classification
Technical requirements
Test methods
Inspection rules
Marking, packaging, transportation and storage·
Warranty period·
SY/T5030—20H00
This standard is a revision of SY5030-93 "190 series diesel engines for oil drilling rigs". The revised standard has a wider scope of application, and its name has been changed to "190 Series Diesel Engines for the Oil and Gas Industry"; it provides definitions of three terms related to faults; it adds requirements for diesel engines for electric drilling rigs and inline 6-cylinder diesel engines after strengthening; environmental protection indicators (such as emissions, noise, etc.) have been greatly improved; the content of the standard has been further improved to meet the needs of economic development. From the date of implementation, this standard will replace SY5030-93 at the same time. This standard was proposed and managed by the National Technical Committee for Standardization of Petroleum Drilling Equipment and Tools. The drafting units of this standard: Jinan Chaishan Machinery Factory and Shengli Power Machinery Factory. The main drafters of this standard are Qu Yuling, Zhai Xingyuan, Li Shusheng, Zhang Qiannong, and Zhu Xuecheng. The cost standard was first issued in 1983, revised for the first time in 1993, and this is the second revision. This standard is entrusted to Jinan Diesel Engine Factory for interpretation. a) Number of strokes: four strokes:
b) Cooling method: forced water cooling:
c) Lubrication method: pressure lubrication and splash lubrication; SY/T 50302000
d) Starting method: compressed air starting or electric starting: ) Cylinder arrangement: V-shaped 60° angle (including 12-cylinder V-shaped, 8-cylinder V-shaped, 6-cylinder V-shaped) or inline (6-cylinder white column); f) Combustion rate type: direct injection;
) Intake method: exhaust gas turbocharger (intercooled or non-cooled) or non-supercharged: 4.2 Rating.1 Conditions
4.2.1 Rated power
The rated power of a diesel engine is the single-machine 12h power or continuous power. When required, the 1h and 15min power can also be calibrated, and it should be stated in the relevant technical documents.
4.2.2 Rated speed
The rated speed of diesel engine is stipulated as the following four types: a) 1500r/min;
b) 1300r/min:
c) 1200r/min;
d) 1000r/min
When there is a special need, it can be stipulated in the contract: 4.2.3 Standard environmental conditions
The standard environmental conditions shall be in accordance with the provisions of GB/T1105.1. 4.3 Basic parameters
The types and main technical parameters of diesel engines are shown in Table 1. Table
Types and main technical parameters of diesel engine
Cylinder diameter, mm
Number of cylinders and
Arrangement
Piston stroke, mm
Rated speed, t/min
Rated power
12h power, kw
Continuous power, kw
Cylinder number
Firing sequence
Average piston speed, m/s
Total displacement, L
Compression ratio
Direction of rotation
7 8 9 10 11 12
洋: The rated power value can also be negotiated by the supply and demand parties and determined separately 2
Basic parameters
Output leakage
Counterclockwise (blood to output end)
Han output end
1500 1200 1000
According to product technical documents
Output terminal
5-3-6-2-4
10.58.47.0
4.4 Model
4.4.1 Model compilation rules
SY/T5030—2000
Diesel engine models are composed of Arabic numerals, Chinese phonetic alphabets and other codes and symbols. The format and the contents represented by the symbols and codes are shown in Figure 1.
4.4.2 Model example
190xxx||tt ||Rated speed code
No code—1500r/min
1—1200r/min
2—1000/mi
3—1300r/min
Purpose code
No code—Mechanical drive drilling rig, general purpose
knife—Electric drilling rig, power generation
(——Other petroleum engineering machinery
C—Ship
—Locomotive
Note: For the same purpose but different performance structures, the lower right corner of the purpose code shall be filled with Arabic numerals. No.
Regional code:
No code - General area
M - Desert area
Y - Plateau area
H - Offshore platform
Structural feature code:
No code - Non-supercharged
- Supercharged
Z - Supercharged, intercooled
Type code:
No code - Single machine
P - Matching machine
Cylinder diameter: Indicates that the cylinder diameter is 190trnCylinder layout code:
VV-shaped layout
1. A straight line (omitted)
Number of cylinders: Indicated by Arabic numerals
Generation code: Given by the manufacturer
Figure 1 Contents of diesel engine model
C12V190ZD1: Retractable type, 12 cylinders V-type, cylinder diameter 190mm single engine, supercharged intercooler, general area, electric drive drilling rig (generator) 1200r/min diesel engine 5 Technical requirements
Diesel engine products should be manufactured according to product drawings and technical documents approved by the prescribed procedures, and should comply with the provisions of this standard. 3
5.1 Starting performance
SY/T 5030—2000
When the ambient temperature is not lower than 5℃, the diesel engine should be able to start smoothly, and the starting time should not exceed 10s; when the ambient temperature is within the range of -40～+5℃, the engine oil and cooling water should be preheated and it should be able to start smoothly. 5.2 Temperature and pressure under rated working conditions
When the diesel engine is running under rated conditions, the temperature and pressure shall meet the following requirements: a) Exhaust temperature (before turbine): when the rated power is greater than 882kW, it shall not be higher than 630℃; when the rated power is less than or equal to 882kW, it shall not be higher than 600℃;
b) Engine oil temperature: not higher than 90℃;
c) Cooling water outlet temperature: not higher than 85℃; d) Main oil channel oil pressure: 400～800kPaa5.3 Power and its deviation
When the diesel engine is running under standard environmental conditions, it shall be able to issue the rated power specified on the nameplate, and its deviation is 5.4 Fuel consumption rate and engine oil consumption rate
The fuel consumption rate and engine oil consumption rate of the diesel engine shall meet the requirements of Table 2. The maximum deviation of the fuel consumption rate shall not exceed 5% of the specified value. Table 2 Fuel consumption rate and engine oil consumption rate
Fuel consumption rate
Nominal working condition
75% load
50% load
Engine oil consumption rate (factory status)
5.5 Correction of power and fuel consumption rate
Supercharged non-intercooled
g/(kw-h)
Supercharged
When the test environment does not conform to the standard environmental conditions, the power and fuel consumption rate shall be corrected according to the method specified in GB/T1105.1. When calculating the fuel consumption rate, the lower calorific value of diesel is 42700kl/kg5.6 Characteristic curve
The manufacturer shall carry out necessary special part tests according to the product's convenient use characteristics and draw corresponding characteristic curves, such as load characteristic curve, propulsion characteristic curve, external characteristic curve, universal characteristic curve, etc. 5.7 Speed regulation performance
The speed regulation performance of the diesel engine under rated T condition shall comply with the provisions of Table 3. Table 3 Speed regulation performance
Mechanical drive drilling rig:
Petroleum engineering machinery
Ordinary generator set
Electric drive drilling rig
5.8 Minimum no-load stable speed and fluctuation value
Stable speed regulation rate
0~5 (adjustable)
According to relevant standards
Speed fluctuation rate
The minimum load stable speed of the diesel engine is not less than 600r/min, its passive value is ±30r/min, and the stabilization time shall not be less than 5min4
Uniformity of working of each cylinder
SY/T5030—2000
When the diesel engine is running under the calibrated working conditions, the unevenness rate of the exhaust temperature of each cylinder shall not be greater than 8%. 5.10 Exhaust Smoke Density
The exhaust smoke density of diesel engine shall not exceed the following provisions: a) 12-cylinder engine: 1.5 FSU; b) 8-cylinder engine: 2.5 FSU; c) 6-cylinder engine: 3.1 FSU.
5.11 Emissions
The pollutants emitted by diesel engine shall meet the following provisions: a) Carbon dioxide (CO) shall not exceed 13.6g/(kW·h); b) The sum of nitrogen oxides (NO) and hydrocarbons (HC) shall not exceed 20g/(kW·h). 5.12 Cleanliness
The cleanliness limits of diesel engine are as follows: a) 12-cylinder engine: 2400mg; b) 8-cylinder engine and 6-cylinder engine: 2000mg.
5.13 Noise
When the diesel engine is running under the rated working condition, the noise limit shall be in accordance with the provisions of Table 4. Table 4 Noise limit
220-~275
>275--340
>340-430
> 430 ~545
>545~680
>680~860
> 860 ~ 1080
5.14 Vibration
Noise (sound power level)
When the diesel engine (without vibration isolation) is running under the rated working condition, the equivalent vibration intensity should not be greater than 11.2mm/s5.15 Sealing
No air leakage, oil leakage and water leakage are allowed on the sealing surfaces and pipe joints of the diesel engine. 5.16 Other performance
The minimum stable working speed, mechanical efficiency, torsional vibration, thermal balance, etc. of diesel engines shall be specified in the relevant technical documents of the product.
Reliability
The reliability test results of diesel engines shall meet the following regulations: a) The average working time before the first fault shall not be less than 500h; b) The average time between failures shall not be less than 500h; c) The first human repair life is as follows:
1) 12-cylinder engine: 18000h;
2) 8-cylinder engine: 15000h;
3) 6-cylinder engine: [0000h.
5.18 Durability
SY/T 5030-—2000
The durability test results of diesel engines shall meet the following requirements: a) No damage to the main parts and components (accessories) (see 6.26.6) (no need to replace); b) The wear value of the main journal and connecting journal is not more than 0.013mm; c) The wear value of the cylinder liner is not more than 0.04mm; d) The increase of the opening of the active ring is not more than 0.2mm; e) The fuel consumption rate does not increase by more than 4% compared with that before the endurance test; T) The oil consumption rate does not increase by more than 30% compared with that before the endurance test; g) The exhaust temperature does not increase by more than 10% compared with that before the endurance test; h) No more than 5 non-main parts are damaged;
i) The number of shutdowns due to failure is not more than 3 times;
i) Other performance indicators shall meet the requirements of this standard. 5.19 Safety devices
When diesel engines are equipped with the following safety protection devices, they shall meet the following requirements: a) Low oil pressure automatic stop device: When the main oil channel pressure is lower than 300kPa, the low oil pressure automatic stop device shall be able to automatically reduce the fuel supply and force the diesel engine to stop.
b) Overspeed stop device: When the diesel engine speed reaches 112%~115% of the rated speed, it shall be able to force the diesel engine to stop automatically within 35s.
c) Explosion-proof device: This device shall be able to interrupt the diesel engine air intake through manual or electrical or pneumatic control, forcing the diesel engine to stop within 30s.
d) Light alarm device: When the diesel engine outlet water temperature, seawater direct cooling temperature, engine oil temperature, and main oil channel oil pressure exceed the specified values, it shall be able to sound and light alarm.
5.20 Metering device
The diesel engine shall be equipped with an accurate and reliable timer, and its reliability shall meet the use requirements. 5.21 Diesel engines for desert areas
Effective measures should be taken to ensure the normal operation of diesel engines in desert areas according to the climate characteristics. 5.22 Diesel engines for plateau areas
When diesel engines are used in areas with an altitude of 1500 to 30001m, appropriate measures should be taken to meet the use requirements. 5.23 Surface paint layer
The surface paint layer of the diesel engine should be firm, uniform and bright, and should not have defects such as wrinkling and peeling. 5.24 Oil seal
When the transportation and storage are in accordance with the relevant regulations, the validity period of the oil seal of the diesel engine and its random accessories and spare parts shall not be less than 12 months from the date of delivery.
6 Test method
6.1 Test conditions
6.1.1 During the test, the measurement technology and accuracy of the main parameters of the diesel engine shall comply with the provisions of GB/T1105.3. 6.1.2 During the test, the diesel engine must be accompanied by the manufacturer's technical documents and accessories specified in the relevant standards. 6.1.3 The fuel used in the test shall comply with the provisions of GB252, and the engine oil shall comply with the provisions of G11122. 6.1.4 When the diesel engine is running under the calibrated working conditions, the temperature and pressure of its engine oil and cooling water shall comply with the provisions of 5.2. 6
6.2 Starting performance test
SY/T 5030--2000
The diesel engine is started in a cold state. When the ambient temperature is not less than 5℃, it is started three times in a row, and at least two are successful. The interval between each start is not less than 2rmnin, and the start time of each start does not exceed 10s. When the motor is used for starting, the timing starts when the motor is turned on, and the diesel engine runs automatically; when the compressed air is used for starting, the timing starts from the action of the air switch, and the diesel engine runs all the way. 6.3 Rated power test
Adjust the fuel supply, gradually increase the load, to the calibrated speed, when the fuel supply mechanism is placed in the maximum sealing position, measure the maximum power of the diesel engine.
6.4 Load characteristic test
When the speed remains unchanged, measure the law of the main technical performance parameters of the diesel engine changing with the load change. The test method shall comply with the provisions of GB/11105.2. 6.5 Speed characteristic test
Measure the law of the main performance parameters of the diesel engine changing with the speed change. The test method shall comply with the provisions of GB/T1105.2. 6.6 Speed regulation performance test
6.6.1 Stable speed regulation
The diesel engine is operated under the calibrated working condition or other working conditions. All loads are removed to make the speed reach the maximum no-load speed. Then the load is gradually increased and the original working condition is restored. The stable speed before and after the load change is measured. The stable speed regulation is calculated according to the method specified in GB/T1105.2.
6.6.2 Instantaneous speed regulation
The diesel engine is operated stably under the calibrated working condition. Then all loads are suddenly removed or it is operated stably at the maximum no-load speed. Then all loads are suddenly added. The relationship between the speed and time is measured. The instantaneous speed regulation is calculated according to the provisions of GB/T1105.2. 6.6.3 Speed fluctuation rate
The diesel engine is operated under the calibrated conditions, fixed and adjusted to the handle, and operated stably for 2 minutes. The maximum speed or minimum speed during this time is measured, and the speed fluctuation rate is calculated according to the method specified in (H/T1105.2). 6.7 Propulsion characteristic test
Measure the change law of various performance parameters when the diesel engine speed and power are operated according to the propulsion characteristics. During the test, the diesel engine operation starts from the lowest stable working speed and is determined according to formula (1). PC,n
Where: power, kw;wwW.bzxz.Net
n—speed, r/min;
Gf—constant.
Measure the relevant data at each stable speed respectively and draw the propulsion characteristic curve. 6.8 Universal characteristic test
Measure the relationship between the main performance parameters of the diesel engine when it is running under various working conditions, determine the comprehensive characteristics of the diesel engine under various working conditions, and the test method shall be in accordance with the provisions of GB/T1105.2. 6.9 Stability test at rated power I
Determine the stability of various performance parameters of the diesel engine when it is running under the rated working conditions. ()
During the test, the diesel engine is continuously operated for 12 hours under the rated T conditions, and the stability of the main performance parameters of the diesel engine is measured (measured every 1 hour). The diesel engine with rated power as continuous power is continuously operated for 24 hours under the rated normal conditions. 6.10 Uniformity test
Determine the stability of each cylinder when the diesel engine is running under the rated working conditions.L is used for uniformity measurement and the exhaust temperature non-uniformity rate is measured. SY/T 50302000
The test method shall be carried out in accordance with the provisions of GB/T1105.2. 6.11 No-load characteristic test
To determine the relationship between the fuel consumption of the diesel engine when it is no-load and the speed. During the test, the diesel engine is not loaded, and the speed is reduced from the highest no-load speed to the lowest no-load stable speed. The relevant data of each stable speed are measured and the no-load characteristic mountain curve is drawn. 6.12 Determination of minimum no-load stable speed
The Chaizhou engine is tested for minimum no-load stable speed with a dynamometer. During the test, gradually adjust the position of the speed control handle to reduce the speed, measure the minimum speed and speed fluctuation value of the diesel engine for stable operation, and stably operate at this speed for no less than 5 minutes. 6.13 Determination of minimum working stable speed During the test, the fuel supply control mechanism of the diesel engine is kept at the maximum power position adjusted by the output, gradually change the load, reduce the speed to the minimum working stable speed, and can stably operate at this speed. 6.14 Determination of mechanical efficiency
The test method shall be carried out in accordance with the provisions of GB/T［105.2. 6.15 Thermal balance test
During the test, the diesel engine is operated under the calibrated operating conditions. In addition to measuring the main performance indicators, all parameters related to thermal balance should also be measured.
6.16 Noise measurement
Noise measurement shall be carried out in accordance with the provisions of GB/T8194. 6.17 Exhaust smoke density measurement
Exhaust smoke density measurement shall be carried out in accordance with the provisions of GB9486. 6.18 Emission measurement
Emission measurement shall be carried out in accordance with the provisions of GR/T6456. 6.19 Vibration measurement
The vibration measurement shall be carried out in accordance with the provisions of GB/T7184. 6.20 Torsional vibration measurement
Torsional vibration measurement shall be carried out in accordance with the provisions of (GB/T15371. 6.21 Oil consumption rate measurement
Oil consumption rate measurement shall be carried out in accordance with the provisions of Appendix A of GB/T1105.2--1987. 6.22 Cleanliness measurement
Cleanliness measurement shall be carried out in accordance with the provisions of GB/T3821. 6.23 Sealing inspection
Before the performance test, the diesel engine to be inspected shall be wiped dry. During the test, each sealing surface and each pipe joint shall not leak oil, air, or be filled with water.
It is allowed to eliminate leakage without replacing parts, disassembling parts, or stopping the machine, but it shall be treated as "no leakage after tightening". 6.24 Safety and timing device inspection
The various requirements specified in 5.19 and 5.20 shall be tested and inspected on the diesel engine; when the test inspection is not available, the following requirements shall be met: When conditions permit, it is allowed to use simulation methods on the test bench to confirm whether its action is sensitive, accurate and reliable. 6.25 Reliability test
Reliability test can be carried out on site.
6.26 Durability test
6.26.1 Performance test before test
Before the durability test, the diesel engine should be subjected to the following performance tests:81
a) Starting performance test:
b) Rated power test;
) Load characteristic test;
d) Speed characteristic test;
SY/T5030—2000
e) Propulsion characteristic test (matching with torque converter and marine diesel engine):
g) Oil consumption rate measurement;
h) Items that the manufacturer considers should be tested. 6.26.2 Performance retest after test
After the durability test, the diesel engine shall be retested according to 6.26.1 b) and h). Before the performance retest, it is allowed to check or adjust the valve clearance, injection pressure, cylinder head nut tightening torque and remove carbon deposits from the injection nozzle. 6.26.3 Test time and procedure
The diesel engine durability test time and operating conditions shall be in accordance with the provisions of Table 5, that is, one cycle is 8 hours. After running for 40 cycles, it shall continue to run at the rated power for 180 hours, with a total of 500 hours
Durability test time and operating conditions
Rated speed
Rated speed
Highest no-load stable speed
Speed at maximum torque point
Lowest no-load stable speed
90% rated power
Rated power
Power at maximum torque point
Note: If the diesel engine is in a relatively stable operating condition, it may also be operated alternately at the rated speed for 12 hours and continuous power, with 8 hours as one cycle. 6.26.4 Inspection and maintenance
6.26.4.1 During the test, maintenance shall be carried out in accordance with the product instruction manual. Maintenance should be scheduled after a cycle is completed. Maintenance time and items should be recorded, and maintenance time does not include human operating time. 6.26.4.2 Check the operating conditions of test equipment, instruments and meters at any time. If any fault or damage is found, it should be eliminated or replaced in time and records should be kept. Any need to stop the vehicle for handling due to this reason will not be counted as a breakdown stop. 6.26.4.3 Check the operation of the diesel engine at any time to find any "oil leakage, gas leakage, flooding" or other faults. Should be eliminated immediately. Stopping the vehicle due to replacement of non-major parts shall not be counted as a breakdown shutdown, but shall be counted as replacement of non-major parts. 6.26.4.4 During the test, if it is found that the diesel engine power drops significantly or the fuel consumption rate increases to 105% of the calibration value, the exhaust temperature reaches 110% of the calibration value, or the diesel engine appears to cause damage to the machine or endanger personal safety, the engine should be stopped immediately. After adjustments and elimination, the test can not be carried out again, and it will be counted as one failure. 6.26.5 Measurement records
During the test, measure the test data every hour and make records. For operating conditions of less than 1 hour, measurement should be performed once for each operating condition. 6.26.6 Main parts and components (accessories)
The main parts and components (accessories) that are not allowed to be damaged (no need to be replaced) during and after the test are: a) Main parts: engine block, cylinder liner, cylinder gasket, cylinder head, cylinder head bolts, piston, piston ring, race pin, connecting rod, connecting rod bushing, connecting rod bearing, connecting rod bolts, crankshaft and balance block bolts, main bearing, main bearing cap, timing gear, main bearing bolts, flywheel, flywheel bolts, camshaft and its bearing, valve, valve guide, valve spring, rocker arm and rocker arm shaft, etc. b) Main parts (accessories): fuel pump, fuel injection pump, speed regulator, fuel injector, fuel filter, water, engine oil, oil cooler25 Reliability test
Reliability test can be carried out on site.
6.26 Durability test
6.26.1 Performance test before test
Before the durability test, the diesel engine should be subjected to the following performance tests:81
a) Starting performance test:
b) Rated power test;
) Load characteristic test;
d) Speed characteristic test;
SY/T5030—2000
e) Propulsion characteristic test (matching with torque converter and marine diesel engine):
g) Oil consumption rate test;
h) Items that the manufacturer considers should be tested. 6.26.2 Performance retest after test
After the durability test, the diesel engine shall be retested according to 6.26.1 b) and h). Before the performance retest, it is allowed to check or adjust the valve clearance, injection pressure, cylinder head nut tightening torque and remove carbon deposits from the injection nozzle. 6.26.3 Test time and procedure
The diesel engine durability test time and operating conditions shall be in accordance with the provisions of Table 5, that is, one cycle is 8 hours. After running for 40 cycles, it shall continue to run at the rated power for 180 hours, with a total of 500 hours
Durability test time and operating conditions
Rated speed
Rated speed
Highest no-load stable speed
Speed at maximum torque point
Lowest no-load stable speed
90% rated power
Rated power
Power at maximum torque point
Note: If the diesel engine is in a relatively stable operating condition, it may also be operated alternately at the rated speed for 12 hours and continuous power, with 8 hours as one cycle. 6.26.4 Inspection and maintenance
6.26.4.1 During the test, maintenance shall be carried out in accordance with the product instruction manual. Maintenance should be arranged after a cycle is completed. Maintenance time and items should be recorded, and maintenance time does not count as human operation time. 6.26.4.2 Check the operation of test equipment, instruments and meters at any time. If any fault or damage is found, it should be eliminated or replaced in time, and records should be kept. If it needs to be stopped for processing, it will not be counted as a fault stop. 6.26.4.3 Check the operation of the diesel engine at any time. If "oil leakage, drowning, flooding" and other faults are found, they should be eliminated immediately. Stopping for replacement of non-major parts will not be counted as a fault stop, but it should be counted as a replacement of non-major parts. 6.26.4.4 During the test, if it is found that the diesel engine power drops significantly or the fuel consumption rate increases to 105% of the calibration value, the exhaust temperature reaches 110% of the calibration value, or the diesel engine has a situation that may cause damage to the machine or endanger personal safety, it should be stopped immediately. After adjustment and elimination, the test will not be carried out, and it will be counted as a fault. 6.26.5 Measurement records
During the test, the test data shall be measured once every 1 hour and the records shall be kept. For working conditions of less than 1 hour, each working condition shall be measured once. 6.26.6 Main parts and components (accessories)
The main parts and components (accessories) that are not allowed to be damaged (no need to be replaced) during and after the test are: a) Main parts: engine body, cylinder liner, cylinder gasket, cylinder head, cylinder head bolts, piston, piston ring, race pin, connecting rod, connecting rod bushing, connecting rod bearing, connecting rod bolts, crankshaft and balance block bolts, main bearing, main bearing cap, timing gear, main bearing bolt, flywheel, flywheel bolt, camshaft and its bearing, valve, valve guide, valve spring, rocker arm and rocker arm shaft, etc. b) Main parts and components (accessories): fuel pump, fuel injection pump, governor, fuel injector, fuel filter, water, engine oil, engine oil cooler25 Reliability test
Reliability test can be carried out on site.
6.26 Durability test
6.26.1 Performance test before test
Before the durability test, the diesel engine should be subjected to the following performance tests:81
a) Starting performance test:
b) Rated power test;
) Load characteristic test;
d) Speed characteristic test;
SY/T5030—2000
e) Propulsion characteristic test (matching with torque converter and marine diesel engine):
g) Oil consumption rate test;
h) Items that the manufacturer considers should be tested. 6.26.2 Performance retest after test
After the durability test, the diesel engine shall be retested according to 6.26.1 b) and h). Before the performance retest, it is allowed to check or adjust the valve clearance, injection pressure, cylinder head nut tightening torque and remove carbon deposits from the injection nozzle. 6.26.3 Test time and procedure
The diesel engine durability test time and operating conditions shall be in accordance with the provisions of Table 5, that is, one cycle is 8 hours. After running for 40 cycles, it shall continue to run at the rated power for 180 hours, with a total of 500 hours
Durability test time and operating conditions
Rated speed
Rated speed
Highest no-load stable speed
Speed at maximum torque point
Lowest no-load stable speed
90% rated power
Rated power
Power at maximum torque point
Note: If the diesel engine is in a relatively stable operating condition, it may also be operated alternately at the rated speed for 12 hours and continuous power, with 8 hours as one cycle. 6.26.4 Inspection and maintenance
6.26.4.1 During the test, maintenance shall be carried out in accordance with the product instruction manual. Maintenance should be arranged after a cycle is completed. Maintenance time and items should be recorded, and maintenance time does not count as human operation time. 6.26.4.2 Check the operation of test equipment, instruments and meters at any time. If any fault or damage is found, it should be eliminated or replaced in time, and records should be kept. If it needs to be stopped for processing, it will not be counted as a fault stop. 6.26.4.3 Check the operation of the diesel engine at any time. If "oil leakage, drowning, flooding" and other faults are found, they should be eliminated immediately. Stopping for replacement of non-major parts will not be counted as a fault stop, but it should be counted as a replacement of non-major parts. 6.26.4.4 During the test, if it is found that the diesel engine power drops significantly or the fuel consumption rate increases to 105% of the calibration value, the exhaust temperature reaches 110% of the calibration value, or the diesel engine has a situation that may cause damage to the machine or endanger personal safety, it should be stopped immediately. After adjustment and elimination, the test will not be carried out, and it will be counted as a fault. 6.26.5 Measurement records
During the test, the test data shall be measured once every 1 hour and the records shall be kept. For working conditions of less than 1 hour, each working condition shall be measured once. 6.26.6 Main parts and components (accessories)
The main parts and components (accessories) that are not allowed to be damaged (no need to be replaced) during and after the test are: a) Main parts: engine body, cylinder liner, cylinder gasket, cylinder head, cylinder head bolts, piston, piston ring, race pin, connecting rod, connecting rod bushing, connecting rod bearing, connecting rod bolts, crankshaft and balance block bolts, main bearing, main bearing cap, timing gear, main bearing bolt, flywheel, flywheel bolt, camshaft and its bearing, valve, valve guide, valve spring, rocker arm and rocker arm shaft, etc. b) Main parts and components (accessories): fuel pump, fuel injection pump, governor, fuel injector, fuel filter, water, engine oil, engine oil cooler
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