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DL/T 1975-2019: Code of operation and maintenance for oil used in hydraulic turbine governing system
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Code of operation and maintenance for oil used in hydraulic turbine governing system
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DL/T 1975-2019
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Basic data | Standard ID | DL/T 1975-2019 (DL/T1975-2019) | | Description (Translated English) | Code of operation and maintenance for oil used in hydraulic turbine governing system | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K55 | | Classification of International Standard | 27.140 | | Word Count Estimation | 12,158 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Quoted Standard | GB/T 260; GB/T 265; GB/T 3536; GB/T 4945; GB/T 7304; GB/T 7597; GB/T 7605; GB/T 8926; GB 11118.1; GB 11120; GB/T 11133; GB/T 11143; GB/T 12579; GB/T 14039; GB/T 17145; GB/T 18854; DL/T 429.7; DL/T 432; SH/T 0193; SH/T 0210; SH/T 0308; SH/T 0805 | | Issuing agency(ies) | National Energy Administration | | Summary | This standard specifies the quality standards, operation supervision and maintenance of the oil used in the hydraulic turbine regulating system. This standard applies to the maintenance of oil used in the regulating system of hydraulic turbines. | DL/T 1975-2019: Code of operation and maintenance for oil used in hydraulic turbine governing system
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Code of operation and maintenance for oil used in hydraulic turbine governing system
ICS 27.140
K 55
People's Republic of China Electric Power Industry Standard
Oil Maintenance Regulations for Hydraulic Turbine Governing System
Refractory materials for boilers in thermal power plants
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Basic regulations...2
5 Operation Supervision...3
6 Maintenance...4
Appendix A (Normative Appendix) GB/T 14039 Oil Cleanliness Classification Standard...7
Appendix B (Normative Appendix) SAE AS4059F Particle Pollution Degree Classification Standard...8
Appendix C (Normative Appendix) Warning limits and countermeasures for operating oil test items...10
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Part 1.Standard Structure and Compilation".
Please note that some of the contents of this document may involve patents, and the issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Electric Power Industry Hydropower Station Automation Standardization Technical Committee.
Drafting organizations of this standard. China Yangtze Power Co., Ltd. Three Gorges Hydropower Plant, State Grid Xinyuan Holdings Co., Ltd., Datang Dragon
Tan Hydroelectric Power Plant.
The main drafters of this standard. Li Zhixiang, Zhang Kai, Liu Lianwei, Yu Zhiqiang, Hu Jun, Li Qingmao, Zhu Bing, Zhang Lei, Chang Long, Wang Peng
Yu, Zhang Jicheng, Zou Ke, Li Ping, Feng Mei, Zhou Pan, Zheng Kai.
The opinions or suggestions during the implementation of this standard will be fed back to the Standardization Management Center of the China Electricity Council (Baiguang Road 2nd, Beijing)
Article number one).
Oil Maintenance Regulations for Hydraulic Turbine Governing System
1 Scope
This standard specifies the oil quality standards and basic requirements for operation supervision and maintenance of hydraulic turbine regulating systems.
This standard applies to the maintenance of the oil used in the hydraulic turbine regulating system.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 260 Determination of water content of petroleum products by distillation method
GB/T 265 Petroleum products kinematic viscosity determination method and kinematic viscosity calculation method
GB/T 3536 Determination of flash point and ignition point of petroleum products Cleveland open cup method
GB/T 4945 Petroleum products and lubricants acid value and base value determination method (color indicator method)
GB/T 7304 Determination of acid value of petroleum products by potentiometric titration
GB/T 7597 Power oil (transformer oil, steam turbine oil) sampling method
GB/T 7605 Determination of Demulsification Degree of Turbine Oil in Operation
GB/T 8926 In-use lubricating oil insoluble matter determination method
GB 11118.1 hydraulic oil (L-HL, L-HM, L-HV, L-HS, L-HG)
GB 11120 turbine oil
GB/T 11133 Determination of water content in petroleum products, lubricants and additives Karl Fischer coulometric titration method
GB/T 11143 Anti-rust performance test method of mineral oil with inhibitor in the presence of water
GB/T 12579 Determination of Lubricating Oil Foam Characteristics
GB/T 14039 Hydraulic transmission oil solid particle pollution degree code
GB/T 17145 Technical Guidelines for Recovery and Recycling of Waste Lubricating Oil
Calibration of GB/T 18854 Hydraulic Transmission Liquid Automatic Particle Counter
DL/T 429.7 Power system oil quality test method-sludge precipitation measurement method
DL/T 432 Measurement method of particle pollution in power oil
SH/T 0193 Determination of oxidation stability of lubricating oil (rotating oxygen bomb method)
SH/T 0210 Hydraulic oil filterability test method
SH/T 0308 Lubricating oil air release value determination method
SH/T 0805 Lubricating oil filterability test method
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
In-service oil
The oil that has been charged into the equipment and is being used.
3.2
Waste oil
Oil products that are forced to be scrapped due to serious deterioration of oil quality or special pollution, and cannot be processed on site and restored to use performance.
3.3
Oil grade number
Also known as the viscosity grade, it is expressed by the midpoint kinematic viscosity value of the oil at 40°C.
3.4
Oil change over
The behavioral process of running oil to change.
3.5
Oil makeup
The behavioral process of adding a certain amount of qualified oil to meet the equipment specification oil quantity.
3.6
Emulsify
The process by which oil and water form an emulsion.
3.7
Eligibility oil
Pass the inspection to meet the standard oil.
4 Basic regulations
4.1 Selection of oil
4.1.1 L-TSA steam turbine oil should be selected as the oil for the hydraulic turbine control system, and its brand, specification variety, brand, and quality grade should be consistent with the unit shaft.
The lubricating oil is the same.
4.1.2 According to the working conditions, the same type of L-HM anti-wear hydraulic oil can be selected. When L-HM anti-wear hydraulic oil is selected, technical experience should be carried out.
Economic comparison argument.
4.2 Requirements before the oil system is put into operation
4.2.1 There should be no welding slag, iron filings, oxide scale, dirt, molding sand and other sundries in all parts of the oil-using equipment.
4.2.2 Relevant pipelines and fittings should be chemically cleaned, dried and sealed with compressed air, and can be installed after acceptance.
4.2.3 After the system is installed, the system should be flushed according to the design requirements.
4.3 Oil sampling
4.3.1 The oil sampling container and sampling method shall be carried out in accordance with the provisions of GB/T 7597.
4.3.2 When sampling new oil, no less than two samples should be taken, and at least one sample should be kept for review or arbitration.
4.3.3 Sampling during normal operation shall meet the following requirements.
a) For normal operation supervision tests, samples should be taken from the cooler outlet; if the cooler outlet does not have sampling conditions or there is no cooler, samples should be taken from the oil
Sampling from the bottom of the oil in the tank. Before sampling, the oil in the tank should circulate normally for at least 24 hours. Do not take samples in the dead corners of the oil system.
b) When sampling, the sampling port should be cleaned, and the oil sample should be discharged not less than 5 times the volume of the sampling pipeline to flush the sampling pipeline.
Should be collected and poured into waste oil drums for unified disposal.
4.3.4 The sampling bottle should be properly labeled, and the label should include the following. unit name, equipment name and serial number, oil brand, test item content,
Sampling location, sampling date, and signature of the person sampling.
5 Operation supervision
5.1 Acceptance of new oil
Turbine oil should be checked and accepted according to the standard of GB 11120, and hydraulic oil should be checked and accepted according to the standard of GB 11118.1.
5.2 Monitoring and testing of operating oil
5.2.1 Regular inspections shall meet the following requirements.
a) Regularly record system oil pressure, oil temperature, oil tank oil level, and oil tank oil level;
b) Regularly record the pressure difference changes of the oil system oil filter and bypass online filter equipment;
c) Regularly check the failure of the desiccant of the fuel tank air filter.
5.2.2 The operating oil quality standards should meet the requirements of Table 1.
5.2.3 Periodic inspection items and inspection cycle should meet the following requirements.
a) See Table 2 for periodic inspection items and inspection cycles.
b) When abnormal oil quality is found, the inspection period should be shortened appropriately.
5.2.4 The test results analysis and measures shall meet the following requirements.
a) Analyze the oil quality inspection results in accordance with the requirements of the operating oil quality standards in Table 1.
b) If the oil quality index is abnormal, find out the cause and take corresponding measures.
c) Refer to Appendix C for test item abnormalities and treatment methods.
6 Maintenance
6.1 Flushing the oil system circuit
6.1.1 The oil system should be flushed before the new unit is put into operation, or after the oil system is changed or after maintenance. Equipment not involved in flushing, before flushing
It should be isolated or bypassed.
6.1.2 The flushing process of the oil system should meet the following requirements.
a) The flow rate of the flushing oil should not be less than 3m/s.
b) During the flushing process, oil samples should be taken from the system at certain intervals for oil cleanliness analysis until the system flushing oil is clean
The degree reached Appendix A -/16/13 or Appendix B 7 level.
c) After the oil system is flushed, clean or replace the filter elements of all levels of the system.
6.2 Draining oil
6.2.1 When the system is draining oil, the residual oil in the cooler, filter and pipeline should be drained.
6.2.2 Drain the oil to an oil storage tank or a cleaned temporary oil storage container. The oil drums, oil tanks, pipelines, and oil pumps used for oil discharge should be clean and
dry.
6.3 Replenishing oil
6.3.1 When the operating oil needs to be replenished, the qualified oil of the same brand and specification as the operating oil should be added.
6.3.2 The mixed oil sample should be tested for sludge precipitation according to DL/T 429.7 before refilling, and refilling can be done after the test is qualified.
6.3.3 After oil replenishment, a full analysis of oil quality shall be carried out after 24 hours of oil system circulation.
6.4 Oil change
6.4.1 When changing the oil, drain the oil in the oil system cleanly.
6.4.2 When cleaning the oil tank and tank, use qualified oil for circulating flushing.
6.4.3 During the flushing process, samples should be taken for inspection regularly until the flushing oil quality meets the requirements of Table 1.
6.4.4 Drain the flushing oil, clean or replace the filter elements of all levels of the system, and inject qualified oil.
6.5 Maintenance of stock oil
6.5.1 For the stock of oil, management accounts such as oil product entry, storage, movement, and exit should be done.
6.5.2 Newly purchased oil can be put into storage only after it has been accepted.
6.5.3 Stock oil should be stored separately. All oil storage barrels and oil tanks should be marked.
6.5.4 Oil quality inspection should be carried out after entering, leaving and changing containers.
6.5.5 The opening and closing of the valve should be checked regularly.
6.5.6 The container should be sealed, and the container with respirator should be checked regularly or replaced with moisture absorbent.
6.6 Purification of oil
6.6.1 The purification treatment can adopt mechanical filtration, vacuum filtration, coalescence separation, electrostatic filtration and other methods; the impurities and moisture in the oil to be purified are relatively high.
For a long time, a variety of methods can be used.
6.6.2 The following items should be noted for mechanical filtration.
a) The filter medium of the filter should be dried in an oven at 100℃ for 2 hours before use.
b) When the oil filter is working, observe the inlet and outlet oil pressure of the oil filter. When the filter oil pressure increases,
Replace the filter paper.
c) When the oil to be purified contains more sludge or other solid impurities, increase the frequency of filter paper replacement.
6.6.3 When vacuum filtration, the following matters should be noted.
a) The oil temperature is controlled below 60℃.
b) Monitor the foam produced in the vacuum tank, manually deflate if necessary, and adjust the deflation volume of the vacuum system
And vacuum.
6.6.4 During coalescence, separation and filtration, the filter pressure difference should be monitored, and the filter element should be replaced when the pressure difference reaches the set value.
6.6.5 Attention should be paid to the following matters during electrostatic filtration.
a) Monitor the foaminess of the oil.
b) When the moisture content in the oil to be purified exceeds the standard, it is not suitable to use an electrostatic oil filter.
6.7 Waste oil disposal
6.7.1 It shall be implemented in accordance with GB/T 17145.
6.7.2 Waste oil drums and waste oil tanks should be marked.
6.7.3 The oily cotton, oily cloth, and oily felt produced in the process of recycling waste oil should be recycled together, and should not be incinerated or buried.
6.7.4 A management account should be established for waste oil recovery.
Appendix A
(Normative appendix)
GB/T 14039 Oil Cleanliness Classification Standard
A.1 GB/T 14039 Oil Cleanliness Classification Standard
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