1 Scope
This standard specifies the terms and definitions, technical requirements, manufacturing requirements, inspection, packaging, transportation and storage, installation and use as well as after-sales service and technical guarantee of elastic metal plastic pad for thrust bearings of hydro-generators (hereinafter referred to as plastic pad).
This standard is applicable to elastic metal plastic pad for thrust bearing of hydro-generator unit; elastic metal plastic pad for guide bearing of hydro-generator unit may also refer to the provisions of this standard.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated reference, the latest edition of the normative document (including any amendments) applies.
GB 11120 Lubricating Oils for Turbines
GB/T 700 Carbon Structural Steels
GB/T 6402-2008 Steel Forgings - Method for Ultrasonic Testing
GB/T 7596 Quality Criteria of Turbine Oils in Service for Power Plants
GB/T 7894-2009 Fundamental Technical Specifications for Hydro Generators
GB/T 8564 Specification Installation of Hydraulic Turbine Generator Units
JB/T 4730.3-2005 Nondestructive Testing of Pressure Equipment - Part 3: Ultrasonic Testing
JB/T 8660 Specification for Package, Transportation and Storage of Hydraulic Units
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
elastic metal plastic composite layer
the composite layer composed of elastic metal wire layer and fluoroplastic or modified fluoroplastic, which is called elastic composite layer for short
3.2
elastic metal plastic pad
the thrust pad formed by soldering elastic composite layer with metal pad foundation via certain process mode, which is called elastic metal plastic pad or plastic pad or EMP pad for short
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
4.1 Allowable Specific Pressure
4.2 Allowable Average Velocity
4.3 Elastic Modulus
4.4 Using Temperature
4.5 Life Span
4.6 Requirements for Thrust Runner of Thrust Bearing
4.7 Requirements for Stress Adjustment During Installation
4.8 Lubricating Oil
5 Manufacturing Requirements
5.1 Elastic Composite Layer
5.2 Surface Roughness
5.3 Pad Profile
5.4 Preset of Wear Testing Mark
5.5 Pad Foundation
6 Inspection
6.1 Dimension and Appearance Inspection
6.2 Inspection of Soldering and Brazing Quality
6.3 Inspection of Pad Foundation Material
7 Packaging, Transportation and Storage
7.1 Packaging Protection
7.2 Accompanying Document
7.3 Items of Protection Mark
7.4 Storage
8 Installation and Use
8.1 Delivery Acceptance
8.2 Installation Preparation
8.3 Insulation Resistance
8.4 Installation
8.5 Turning
8.6 Re-inspection
8.7 Oil Injection
8.8 Jacking up the Rotor
8.9 Hot Start
8.10 Inert Shutdown
8.11 Running Conditions and Parameter Setting of Plastic Pad
8.12 Interruption of Cooling Water Running
8.13 Special Running Conditions
8.14 Oil Quality Testing
8.15 Wear Testing
9 After-sales Service and Technical Guarantee
9.1 Product Performance Guarantee
9.2 Maintenance or Replacement
Annex A (Informative) Ultrasonic Testing and Quality Assessment on Soldering and Brazing Quality of Elastic Metal Plastic Pad
A.1 Testing Personnel
A.2 Tester
A.3 Probe, Coupling Agent and Contrast Reference Block
A.4 Requirements on Inspection of Soldering and Brazing Quality
A.5 Bonding State Identification
A.6 Defect Size Determination
A.7 Assessment of Soldering and Brazing Quality
Table 1 Allowable Defect Area and Quantity of Elastic Metal Plastic Pad by Soldering and Brazing
