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GB/T 10969-2008 English PDF (GBT10969-2008)
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GB/T 10969-2008: Specification for water passage components of hydraulic turbines, storage pumps and pump-turbines
GB/T 10969-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.140
K 55
Replacing GB/T 10969-1996
Specification for Water Passage Components of Hydraulic
Turbines, Storage Pumps and Pump-turbines
ISSUED ON: JUNE 30, 2008
IMPLEMENTED ON: APRIL 1, 2009
Issued by: General Administration for Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms, Definitions, Symbols and Units ... 5
3.1 Terms, Definitions and Symbols ... 5
3.2 Unit ... 8
4 Technical Requirements for Geometrical Similarity of Model and Prototype ... 8
4.1 General Provisions... 8
4.2 Check Contents of Geometrical Similarity ... 9
4.3 Evaluation of Uniformity and Geometrical Similarity ... 9
4.4 Dimensional Check Procedures ... 10
4.5 Dimensional Check Methods ... 10
4.6 Multistage Machines, Seals and Thrust Balancing Provisions ... 11
4.7 Dimensional Check Range of Water Passage Components ... 11
4.8 Surface Roughness and Waviness of Water Passage Components ... 28
4.9 Applicability to other Types of Machines ... 30
Specification for Water Passage Components of Hydraulic Turbines,
Storage Pumps and Pump-Turbines
1 Scope
This standard only specifies the control dimension accuracy of water passage components of
hydraulic turbines, storage pumps and pump-turbines that are influential to the hydraulic
performance as well as the surface quality of water passage components in the aspect of the
requirements in prototype hydraulic turbine having geometrical similarity with the model.
This standard is applicable to the model and prototype hydraulic turbines, storage pumps and
pump-turbines meeting one of the following conditions:
a) Whose power is 10MW and the above;
b) Radial flow machines, whose runner nominal diameter is 1.0m and the above;
c) Axial flow, tubular and diagonal machines, whose runner nominal diameter is 3.3m
and the above;
d) Centrifugal storage pumps, whose runner nominal diameter is 1.0m and the above;
e) Impulse turbines, whose runner nominal diameter is 1.0m and the above.
Prototype hydraulic turbines, storage pumps and pump-turbines whose dimension and
capacity are less than the above conditions may refer to this standard.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
provisions of this standard. For dated reference, subsequent amendments to (excluding
correction to), or revisions of, any of these publications do not apply. However, the parties to
agreements based on this standard are encouraged to investigate the possibility of applying
the most recent editions of the standards. For undated references, the latest edition of the
normative document referred to applies.
GB/T 2900.45 Electrotechnical terminology - Hydroelectric powerplant
machinery (GB/T 2900.45-2006, IEC/TR 61364:1999,
MOD)
GB/T 8564-2003 Specification installation of hydraulic turbine generator units
GB/T 15468-2006 Fundamental technical requirements for hydraulic turbines
Figure 2 -- Definition of waviness and surface roughness
3.1.10
Surface roughness
Surface roughness is the characteristic quality of the surface. Generally speaking, it is
characterized by the arithmetical average tolerance of staggered profiles produced by the
cutting action of tool edges, abrasive grains, feed of the machine, coating and painting or
originally produced by the fabrication (welding) process, as shown in Figure 2.
Symbol: Ra
Unit: μm
3.1.11
Water passage components
As for the types of machines stated in this standard, they refer to the components with main
water flow passing from diversion component inlet to drainage component outlet.
3.2 Unit
The international system of units (SI) and China statutory measurement units have been used
throughout this standard.
4 Technical Requirements for Geometrical Similarity of
Model and Prototype
4.1 General Provisions
A basic requirement for determining prototype performance is to have geometrical similarity
between model and prototype.
Where the dimension tolerance of model meets the requirements of this standard, the
measured average values may be replaced by the theoretical values.
Where the prototype is heterogenic to the model, an agreement shall be reached between the
supplier and the purchaser whether the model efficiency is to be corrected or not through
technology demonstration or individual test.
Water passage surface control dimension of water passage components shall not only meet the
permissible tolerance specified in this standard, but also meet the structural coordination
tolerance and the relevant requirements of GB 8564-2003.
possible to determine if the uniformity requirement has been met. If the uniformity
requirement is not fulfilled, the corresponding components shall be corrected or
remanufactured. In the case where the tolerance between the average value and the theoretical
value is outside the permissible uniformity tolerance, the theoretical values or the geometrical
dimensions of the components shall be corrected. Where spot-checks are performed for the
recurrent components, the individual values may be directly compared with the theoretical
values.
4.3.2 Checking the geometrical similarity between prototype and model
By comparing the corresponding average values of model and prototype and considering the
permissible similarity tolerances as given by this standard, it can be determined whether the
geometrical similarity requirement has been met.
If the geometrical tolerances are greater than the similarity tolerances, further steps shall be
agreed by both parties.
For some dimensions which are difficult to measure on the model and/or prototype, the
average values of model and/or prototype may be replaced by the theoretical values, provided
that the total manufacturing and/or installation permissible tolerances is less than the
permissible similarity tolerance.
4.4 Dimensional Check Procedures
4.4.1 Geometrical similarity check for model and prototype generally starts from the model
to check the geometrical similarity of prototype. Where the model is manufactured according
to the existing prototype, the check starting point shall be the prototype.
4.4.2 Geometrical similarity check is composed of single check and post-assembly check.
As for the single check, the similarity of single component shall be checked. As for the
post-assembly check, the similarity of the entire machine shall be checked. The runner axis
and/or guide vane center line is usually used as the reference value for the relevant physical
dimension of component assembly. Water passage formed by the transition between adjacent
component, fixing and rotating parts shall be paid special attention to during the check.
Relevant permissible tolerances are not specified in this standard.
4.5 Dimensional Check Methods
To measure the shape (axial surface) of runner/impeller blades, guide vanes and stay vanes,
several methods are suitable, including three dimensional co-ordinate measuring systems,
optical measuring systems, templates, etc. Corresponding check for the blade shapes and
geometrical positions of runner/impeller may be used for determining the blade setting angle.
Using three dimensional co-ordinate measuring systems or optical measuring systems,
measurement can be made either by measuring poin...
Get QUOTATION in 1-minute: Click GB/T 10969-2008
Historical versions: GB/T 10969-2008
Preview True-PDF (Reload/Scroll if blank)
GB/T 10969-2008: Specification for water passage components of hydraulic turbines, storage pumps and pump-turbines
GB/T 10969-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.140
K 55
Replacing GB/T 10969-1996
Specification for Water Passage Components of Hydraulic
Turbines, Storage Pumps and Pump-turbines
ISSUED ON: JUNE 30, 2008
IMPLEMENTED ON: APRIL 1, 2009
Issued by: General Administration for Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms, Definitions, Symbols and Units ... 5
3.1 Terms, Definitions and Symbols ... 5
3.2 Unit ... 8
4 Technical Requirements for Geometrical Similarity of Model and Prototype ... 8
4.1 General Provisions... 8
4.2 Check Contents of Geometrical Similarity ... 9
4.3 Evaluation of Uniformity and Geometrical Similarity ... 9
4.4 Dimensional Check Procedures ... 10
4.5 Dimensional Check Methods ... 10
4.6 Multistage Machines, Seals and Thrust Balancing Provisions ... 11
4.7 Dimensional Check Range of Water Passage Components ... 11
4.8 Surface Roughness and Waviness of Water Passage Components ... 28
4.9 Applicability to other Types of Machines ... 30
Specification for Water Passage Components of Hydraulic Turbines,
Storage Pumps and Pump-Turbines
1 Scope
This standard only specifies the control dimension accuracy of water passage components of
hydraulic turbines, storage pumps and pump-turbines that are influential to the hydraulic
performance as well as the surface quality of water passage components in the aspect of the
requirements in prototype hydraulic turbine having geometrical similarity with the model.
This standard is applicable to the model and prototype hydraulic turbines, storage pumps and
pump-turbines meeting one of the following conditions:
a) Whose power is 10MW and the above;
b) Radial flow machines, whose runner nominal diameter is 1.0m and the above;
c) Axial flow, tubular and diagonal machines, whose runner nominal diameter is 3.3m
and the above;
d) Centrifugal storage pumps, whose runner nominal diameter is 1.0m and the above;
e) Impulse turbines, whose runner nominal diameter is 1.0m and the above.
Prototype hydraulic turbines, storage pumps and pump-turbines whose dimension and
capacity are less than the above conditions may refer to this standard.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
provisions of this standard. For dated reference, subsequent amendments to (excluding
correction to), or revisions of, any of these publications do not apply. However, the parties to
agreements based on this standard are encouraged to investigate the possibility of applying
the most recent editions of the standards. For undated references, the latest edition of the
normative document referred to applies.
GB/T 2900.45 Electrotechnical terminology - Hydroelectric powerplant
machinery (GB/T 2900.45-2006, IEC/TR 61364:1999,
MOD)
GB/T 8564-2003 Specification installation of hydraulic turbine generator units
GB/T 15468-2006 Fundamental technical requirements for hydraulic turbines
Figure 2 -- Definition of waviness and surface roughness
3.1.10
Surface roughness
Surface roughness is the characteristic quality of the surface. Generally speaking, it is
characterized by the arithmetical average tolerance of staggered profiles produced by the
cutting action of tool edges, abrasive grains, feed of the machine, coating and painting or
originally produced by the fabrication (welding) process, as shown in Figure 2.
Symbol: Ra
Unit: μm
3.1.11
Water passage components
As for the types of machines stated in this standard, they refer to the components with main
water flow passing from diversion component inlet to drainage component outlet.
3.2 Unit
The international system of units (SI) and China statutory measurement units have been used
throughout this standard.
4 Technical Requirements for Geometrical Similarity of
Model and Prototype
4.1 General Provisions
A basic requirement for determining prototype performance is to have geometrical similarity
between model and prototype.
Where the dimension tolerance of model meets the requirements of this standard, the
measured average values may be replaced by the theoretical values.
Where the prototype is heterogenic to the model, an agreement shall be reached between the
supplier and the purchaser whether the model efficiency is to be corrected or not through
technology demonstration or individual test.
Water passage surface control dimension of water passage components shall not only meet the
permissible tolerance specified in this standard, but also meet the structural coordination
tolerance and the relevant requirements of GB 8564-2003.
possible to determine if the uniformity requirement has been met. If the uniformity
requirement is not fulfilled, the corresponding components shall be corrected or
remanufactured. In the case where the tolerance between the average value and the theoretical
value is outside the permissible uniformity tolerance, the theoretical values or the geometrical
dimensions of the components shall be corrected. Where spot-checks are performed for the
recurrent components, the individual values may be directly compared with the theoretical
values.
4.3.2 Checking the geometrical similarity between prototype and model
By comparing the corresponding average values of model and prototype and considering the
permissible similarity tolerances as given by this standard, it can be determined whether the
geometrical similarity requirement has been met.
If the geometrical tolerances are greater than the similarity tolerances, further steps shall be
agreed by both parties.
For some dimensions which are difficult to measure on the model and/or prototype, the
average values of model and/or prototype may be replaced by the theoretical values, provided
that the total manufacturing and/or installation permissible tolerances is less than the
permissible similarity tolerance.
4.4 Dimensional Check Procedures
4.4.1 Geometrical similarity check for model and prototype generally starts from the model
to check the geometrical similarity of prototype. Where the model is manufactured according
to the existing prototype, the check starting point shall be the prototype.
4.4.2 Geometrical similarity check is composed of single check and post-assembly check.
As for the single check, the similarity of single component shall be checked. As for the
post-assembly check, the similarity of the entire machine shall be checked. The runner axis
and/or guide vane center line is usually used as the reference value for the relevant physical
dimension of component assembly. Water passage formed by the transition between adjacent
component, fixing and rotating parts shall be paid special attention to during the check.
Relevant permissible tolerances are not specified in this standard.
4.5 Dimensional Check Methods
To measure the shape (axial surface) of runner/impeller blades, guide vanes and stay vanes,
several methods are suitable, including three dimensional co-ordinate measuring systems,
optical measuring systems, templates, etc. Corresponding check for the blade shapes and
geometrical positions of runner/impeller may be used for determining the blade setting angle.
Using three dimensional co-ordinate measuring systems or optical measuring systems,
measurement can be made either by measuring poin...
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