1 Scope
This standard specifies the test terms, definitions and symbols, test types and test items, test implementation, test conditions and measuring methods for screw pumps.
This standard is applicable to the test and acceptance of single screw pump, double screw pump, three screw pump and five screw pump (hereinafter referred to as the “pump”) products.
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 265 Petroleum products - Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 1032 Test procedures for three-phase induction motors
GB/T 1311 Test procedure for direct current machines
GB/T 3214 Methods for measurement of capacity of pump
GB/T 3216 Rotodynamic pumps - Hydraulic performance acceptance tests - Grades 1, 2 and 3
GB/T 29529 Methods of measuring and evaluating noise of pumps
GB/T 29531 Methods of measuring and evaluating vibration of pumps
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions established in GB/T 3216 and the following apply.
3.1.1
rated pressure
the difference between the outlet pressure and the inlet pressure of the pump under the rated condition
3.1.2
overall pressure
the difference between the measured outlet pressure and the inlet pressure of the pump
3.1.3
outlet working pressure
the outlet pressure of the pump under the rated condition
3.2 Symbols
For the purposes of this standard, symbols, names and units specified in Table 1 apply.
Foreword i
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Test types and items
4.1 End-of-manufacturing test
4.2 Type test
4.3 Special test
5 Test implementation
5.1 General requirements
5.2 Operation test
5.3 Valve test
5.4 Performance test
5.5 Cavitation test
5.6 Vibration test
5.7 Noise test
5.8 Other tests
6 Test conditions
6.1 Test medium
6.2 Test speed
6.3 Test device
6.4 Test system
6.5 Uncertainty of measuring system
6.6 Total uncertainty of measurement
6.7 Operation stability
7 Measuring method
7.1 Measurement of flow rate
7.2 Measurement of pressure
7.3 Measurement of speed
7.4 Measurement of shaft power
7.5 Measurement of temperature
7.6 Measurement of viscosity
Annex A (Informative) Performance test record sheet for screw pumps
Annex B (Informative) Performance curve of screw pumps
Annex C (Informative) Calculation and conversion of performance parameters
C.1 Calculation and conversion of flow rate
C.2 Calculation and conversion of pressure
C.3 Calculation and conversion of shaft power
C.4 Calculation of output power of pump
C.5 Calculation of efficiency of pump
C.6 Calculation of deviation of flow rate and shaft power
