Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by and is under the jurisdiction of the National Technical Committee on Metallurgical Equipment of the Standardization Administration of China (SAC/TC 409).
Lubrication system - Efficiency assessment method
1 Scope
This standard specifies the efficiency assessment method of lubrication system (including main elements such as lubrication pump, cooler and electric heater).
This standard is applicable to the efficiency assessment of mass-produced lubrication systems, and may also serve as a reference for other lubrication devices.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 14039-2002 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
GB 18613-2012 Minimum allowable values of energy efficiency and energy efficiency grades for small and medium three-phase asynchronous motors
3 General provisions of test conditions
3.1 Test preparation and general test conditions
3.1.1 The test schedule is developed.
3.1.2 Prior to the test, correctness and functional suitability of the installation of instruments and equipment shall be inspected, and the instruments and equipment requiring a periodic appraisal shall be within the specified inspection period.
3.1.3 The valve and control system of the tested system is inspected to eliminate the factors affecting the normal test.
3.1.4 For the power supply, the voltage fluctuation is ±5% and the frequency fluctuation is ±1%.
3.1.5 The kinematic viscosity of the lubricating oil for test is 288~352mm2/s (at the oil temperature of 40℃).
3.1.6 The solid contamination degree of the test oil shall meet the requirements of -/20/17~-/21/18 in Table 1, GB/T 14039-2002.
3.2 Test conditions for lubrication pump
3.2.1 The oil temperature during test shall be 40±3℃.
3.2.2 The torque and speed at the input end of the tested lubrication pump are detected with a torque speed sensor. When the torque speed sensor is installed horizontally with a rigid coupling, the coaxiality of the pump device shall be less than 0.05mm; when an elastic coupling is used for installation, such coaxiality shall be less than 0.2mm. See Figure 1 for the schematic diagram for installation of torque speed sensor.
Figure 1 Schematic diagram for installation of torque speed sensor
3.3 Test conditions for cooler
3.3.1 The temperature of cooling medium (cooling water) at the inlet of cooler is 28±2℃.
3.3.2 For the cooler, the flow rate of cooling medium (cooling water) is 1.5 times that of thermal medium (lubricating oil).
3.3.3 The relative error of thermal balance shall be less than 5%, and is calculated according to Equation (8):
3.4 Test conditions for electric heater
3.4.1 The test oil tank has a volume of 1.2m3, containing 1m3 lubricating oil.
3.4.2 The lubricating oil is heated from the initial temperature of 10±2℃ to 25±2℃.
3.4.3 The ratio of the electric energy loss to the total electric energy of the electric heater shall be less than 5%. See Equation (15) for its calculation.
3.5 Measuring accuracy
The permissible errors of measuring instruments and meters shall be within the range specified in Table 1.
Table 1 Permissible errors of measuring instruments and meters
Measurement category Unit Reading accuracy of instruments and meters
Temperature ℃ ±1.0%
Pressure MPa ±1.6%
Flow rate L/min ±1.5%
Torque N·m ±1.0%
Speed r/min ±1.0%
4 Efficiency assessment method of lubrication system
4.1 Efficiency assessment value of lubrication system
The efficiency assessment value of the lubrication system is determined by the efficiency assessment values of motor, lubrication pump, cooler and electric heater and the conformance of lubricating oil supplied by the lubrication system to the main machine. And is calculated using Equation (1).
Foreword i
1 Scope
2 Normative references
3 General provisions of test conditions
3.1 Test preparation and general test conditions
3.2 Test conditions for lubrication pump
3.3 Test conditions for cooler
3.4 Test conditions for electric heater
3.5 Measuring accuracy
4 Efficiency assessment method of lubrication system
4.1 Efficiency assessment value of lubrication system
4.2 Efficiency assessment method of motor
4.3 Efficiency assessment method of lubrication pump
4.4 Efficiency assessment method of cooler
4.5 Efficiency assessment method of electric heater
Annex A (Informative) Schematic diagram for efficiency test of lubrication pump
Annex B (Informative) Installation diagram for efficiency test of lubrication pump
Annex C (Informative) Schematic diagram for efficiency test of cooler
Annex D (Informative) Installation diagram for efficiency test of cooler
Annex E (Informative) Installation diagram for efficiency test of electric heater
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by and is under the jurisdiction of the National Technical Committee on Metallurgical Equipment of the Standardization Administration of China (SAC/TC 409).
Lubrication system - Efficiency assessment method
1 Scope
This standard specifies the efficiency assessment method of lubrication system (including main elements such as lubrication pump, cooler and electric heater).
This standard is applicable to the efficiency assessment of mass-produced lubrication systems, and may also serve as a reference for other lubrication devices.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 14039-2002 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
GB 18613-2012 Minimum allowable values of energy efficiency and energy efficiency grades for small and medium three-phase asynchronous motors
3 General provisions of test conditions
3.1 Test preparation and general test conditions
3.1.1 The test schedule is developed.
3.1.2 Prior to the test, correctness and functional suitability of the installation of instruments and equipment shall be inspected, and the instruments and equipment requiring a periodic appraisal shall be within the specified inspection period.
3.1.3 The valve and control system of the tested system is inspected to eliminate the factors affecting the normal test.
3.1.4 For the power supply, the voltage fluctuation is ±5% and the frequency fluctuation is ±1%.
3.1.5 The kinematic viscosity of the lubricating oil for test is 288~352mm2/s (at the oil temperature of 40℃).
3.1.6 The solid contamination degree of the test oil shall meet the requirements of -/20/17~-/21/18 in Table 1, GB/T 14039-2002.
3.2 Test conditions for lubrication pump
3.2.1 The oil temperature during test shall be 40±3℃.
3.2.2 The torque and speed at the input end of the tested lubrication pump are detected with a torque speed sensor. When the torque speed sensor is installed horizontally with a rigid coupling, the coaxiality of the pump device shall be less than 0.05mm; when an elastic coupling is used for installation, such coaxiality shall be less than 0.2mm. See Figure 1 for the schematic diagram for installation of torque speed sensor.
Figure 1 Schematic diagram for installation of torque speed sensor
3.3 Test conditions for cooler
3.3.1 The temperature of cooling medium (cooling water) at the inlet of cooler is 28±2℃.
3.3.2 For the cooler, the flow rate of cooling medium (cooling water) is 1.5 times that of thermal medium (lubricating oil).
3.3.3 The relative error of thermal balance shall be less than 5%, and is calculated according to Equation (8):
3.4 Test conditions for electric heater
3.4.1 The test oil tank has a volume of 1.2m3, containing 1m3 lubricating oil.
3.4.2 The lubricating oil is heated from the initial temperature of 10±2℃ to 25±2℃.
3.4.3 The ratio of the electric energy loss to the total electric energy of the electric heater shall be less than 5%. See Equation (15) for its calculation.
3.5 Measuring accuracy
The permissible errors of measuring instruments and meters shall be within the range specified in Table 1.
Table 1 Permissible errors of measuring instruments and meters
Measurement category Unit Reading accuracy of instruments and meters
Temperature ℃ ±1.0%
Pressure MPa ±1.6%
Flow rate L/min ±1.5%
Torque N·m ±1.0%
Speed r/min ±1.0%
4 Efficiency assessment method of lubrication system
4.1 Efficiency assessment value of lubrication system
The efficiency assessment value of the lubrication system is determined by the efficiency assessment values of motor, lubrication pump, cooler and electric heater and the conformance of lubricating oil supplied by the lubrication system to the main machine. And is calculated using Equation (1).
Contents of GB/T 38274-2019
Foreword i
1 Scope
2 Normative references
3 General provisions of test conditions
3.1 Test preparation and general test conditions
3.2 Test conditions for lubrication pump
3.3 Test conditions for cooler
3.4 Test conditions for electric heater
3.5 Measuring accuracy
4 Efficiency assessment method of lubrication system
4.1 Efficiency assessment value of lubrication system
4.2 Efficiency assessment method of motor
4.3 Efficiency assessment method of lubrication pump
4.4 Efficiency assessment method of cooler
4.5 Efficiency assessment method of electric heater
Annex A (Informative) Schematic diagram for efficiency test of lubrication pump
Annex B (Informative) Installation diagram for efficiency test of lubrication pump
Annex C (Informative) Schematic diagram for efficiency test of cooler
Annex D (Informative) Installation diagram for efficiency test of cooler
Annex E (Informative) Installation diagram for efficiency test of electric heater
