Automatic Ultrasonic Apparatus Developed for Periodic Inspection of the High Pressure Hydraulic System at Dinorwic Power Station

1980 ◽  
pp. 283-290 ◽  
Author(s):  
J.A. Deane
Keyword(s):  
High Pressure ◽  
Hydraulic System ◽  
Power Station ◽  
Periodic Inspection ◽  
Ultrasonic Apparatus

scholarly journals Numerical hydrodynamic researches for justifying design of the Nizhny Novgorod low-head hydraulic system

2019 ◽  
pp. 3-3
Author(s):  
Anna Glotko ◽  
Vitalii Belikov ◽  
Natalia Borisova ◽  
Ekaterina Vasil`eva ◽  
Aleksey Rumjancev
Keyword(s):  
Numerical Methods ◽  
Hydraulic System ◽  
Problem Area ◽  
Low Flow ◽  
Hydroelectric Power Station ◽  
Two Dimensional ◽  
Hydroelectric Power ◽  
Flow Conditions ◽  
Power Station ◽  
Low Head

Introduction. A problem area of the Volga river between the Nizhny Novgorod hydroelectric power station and the city of Nizhny Novgorod has been surveyed, where unfavourable conditions for navigation, power generation, and safe living in the downstream are formed as a result of the landing level. The only solution to the problem is construction of a low-head hydraulic system (NNGU) that will reduce intensity of relief re-formations in the downstream of the Nizhny Novgorod hydraulic system and stop lowering of the bottom and level marks in this area. Purpose of this research is to study processes that occur upstream and downstream from the site of the facility to identify hazardous trends and develop practical solutions to minimize negative impacts; as well as a review of mathematical models conducted in this area for improving navigation conditions. Materials and methods. Materials of previous researches on this subject, pre-design engineering surveys and layout drawings of the designed hydraulic system are used. The researches have been performed with numerical methods using Stream 2D software package that is based on the two-dimensional differential equation Saint-Venant system. Options for low-flow conditions are considered, taking into account passing of the Nizhny Novgorod hydroelectric power station, as well as rare floods. Results. Plans for distribution of velocity modules and vectors are created, which show that construction of the low-pressure hydraulic system results in decrease in slopes and velocities of water in the problem area of the Volga-Kama cascade, as a result of which intensity of bottom deformations decreases. Rare flow passage demonstrated that difference in pools is insignificant, while, at the same time, flow of water along the left-bank floodplain passes more than believed before. Calculations of low-flow conditions demonstrated a number of deficiencies in the design, which are associated with insufficient throughput and uneven distribution of flow rates in the discharge area of the waterfront. Conclusion The results demonstrated a practical importance of using mathematical simulation with numerical methods in a two-dimensional formulation, which allow us to consider processes in more detailed manner and change the hydraulic system design in a timely manner.

Paper 5: Glandless Boiler Circulating Pumps

1969 ◽  
Vol 184 (11) ◽  
pp. 53-64
Author(s):  
R. Weldon ◽  
R. Kellett
Keyword(s):  
High Pressure ◽  
Cooling System ◽  
Rotor System ◽  
Design Features ◽  
Power Station ◽  
Design And Development ◽  
Temperature Levels ◽  
Principal Design

This paper gives an outline of the design and development of the 750-b.h.p. prototype glandless boiler circulating pump to be commissioned at Kingsnorth Power Station. Suction conditions of 2650 lb/in2 (gauge) and 650°F demanded special techniques for the maintenance of safe motor winding temperature levels under all types of operation. Constructional details of the high-pressure casings and the rotor system, employing water-lubricated bearings, are discussed, together with those of the auxiliary cooling system. Comprehensive prototype tests were carried out to prove the principal design features. Particulars of the test rigs used and the results obtained from them are given.

Oil Source Valve Optimized Design and its Application in Mechanical Loader

2014 ◽  
Vol 1044-1045 ◽  
pp. 930-932
Author(s):  
Yu Ping Wei
Keyword(s):  
Operating System ◽  
High Pressure ◽  
Hydraulic System ◽  
Optimized Design ◽  
Variable Speed ◽  
Small Flow ◽  
Oil Source ◽  
Working Device ◽  
Large Flow

The operating system of loader working device is composed of the boom and bucket. It is operated mainly through multi-way valve axis manipulation, this kind of way is force-large, labor-intensive, but is low efficient. So it is necessary to optimize the oil source valve. Using the hydraulic pilot to control loader multi-way valve to optimize in the loader is safe, comfortable, furnished spirit and can achieve variable speed. Working hydraulic system uses a small flow pilot circuit control. The main oil is controlled by high pressure and large flow, and then the operating force of the working device is reduced greatly.

Thermal Equilibrium Analysis of Loaders’ High-Pressure Hydraulic System

2010 ◽  
Vol 139-141 ◽  
pp. 975-980
Author(s):  
Xiao Bin Wang ◽  
Shu Mei Chen ◽  
He Ting Huang ◽  
Ji Wen Zhuo
Keyword(s):  
High Pressure ◽  
Thermal Equilibrium ◽  
Hydraulic System ◽  
Power Loss ◽  
Practical Work ◽  
Equilibrium Analysis ◽  
Wheel Loader ◽  
Simulation Results ◽  
The Cost ◽  
Research Show

The Loaders’ hydraulic transmission system trends towards medium and high-pressure. The research object of this paper is thermal equilibrium of new quantitative medium and high-pressure hydraulic system of type 50 of wheel loader, which is developed by Xiamen Xia Gong (XG) Machinery Co., Ltd. (abbreviated as XGMA). Aim is to research the thermal equilibrium of loader’s hydraulic system before increasing the pressure at 16MPa and prove the simulation results reliability through experiment (max error is 11.57%). The simulation results are thought to be reliable, after ignoring some disturbance factors existing in the practical work. Consequently, loader's thermal equilibrium have been done after increasing pressure to 20MPa, the results of research show that thermal equilibrium will be obviously optimized, it will drop power loss (drop 17%) and improve hydraulic system’s reliability and reduce the cost after pressure was raised.

Research on the Inspection Parameters of Ultrasonic Phased Array for the Periodic Inspection of High-Pressure Hydrogen Vessel

2020 ◽  
Author(s):  
Cunjian Miao ◽  
Weican Guo ◽  
Zhangwei Ling ◽  
Yangji Tao ◽  
Ting Yu ◽  
...  
Keyword(s):  
High Pressure ◽  
Phased Array ◽  
Ultrasonic Method ◽  
Standard Test ◽  
Test Block ◽  
Butt Weld ◽  
Periodic Inspection ◽  
Ultrasound Field ◽  
Ultrasonic Phased Array ◽  
Pressure Hydrogen

Abstract Steel layered high-pressure hydrogen vessel is one of different kinds of high-pressure vessel, which is invented in China and is widely equipped in hydrogen refueling stations for its good safety and storage functions. Many of these vessels are put into application these years, and it is nearly the time for these vessels to go through periodic inspection. However, there is no such a method for the periodic inspection especially on the butt weld connecting the double-layer head and the interface forging. To conquer the difficulties about the periodic inspection, a set of periodic inspection methods was first proposed in a lasted released Chinese group standard, in which the inner ultrasonic phased array is considered to be the most complicated detecting approach. To establish effective inspection parameters, simulations and experiments were conducted on the factors, including coupling, elements and aperture, focal law, scanning approaches and ultrasound field. Standard test block and contrast test block were designed and machined and tested, then a series of feasible parameters were determined. Thus, specific probe, wedge and instrument were manufactured, and the inspection on the actual vessel product was carried out. The results showed that the proposed ultrasonic method and its inspection parameters could meet the periodic inspection well. Finally, the periodic inspection methods were established and issued as a standard.

Design of an Automatic Device for Cleaning Cellular Evaporator

2014 ◽  
Vol 494-495 ◽  
pp. 1012-1015
Author(s):  
Zhong Min Wang ◽  
Xin Xin Ji ◽  
Jun Ma
Keyword(s):  
High Pressure ◽  
Hydraulic System ◽  
Automatic Device ◽  
Water Jet ◽  
Numerical Control ◽  
Cleaning Device ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Supporting Frame ◽  
Generating System

. An automatic cleaning device used for cleaning cellular evaporator in sugar factory is designed, which uses high-pressure water jet to clean fouls. The device includes supporting frame, linear guides, sending and closing pipes mechanism, hydraulic system and high-pressure water jet generating system, etc. Actions of sending and closing pipes as well as other cleaning operations are controlled by a numerical control system. Experiments show this device can replace manual cleaning for achieving automatic cleaning to a cellular evaporator, and it significantly increases cleaning efficiencies.

Optimization and Application for Direct Air-Cooled Condenser Automatic Cleaning Device

2013 ◽  
Vol 694-697 ◽  
pp. 3016-3019 ◽  
Author(s):  
Qun Zhao ◽  
Feng Liu ◽  
Zhen Sun
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Power Station ◽  
Structure Characteristics ◽  
Cleaning System ◽  
Transmission Part ◽  
Cleaning Device ◽  
System Project ◽  
Domestic Power

Analysis of the structure characteristics of power plant direct air-cooled condenser automatic cleaning device. The disadvantages are that: Inclination deformation occur when the cleaning device was running; Transmission part was short serving life and easy damage; The high-pressure hose could damage air-cooled finned body, etc. Proposes a new structure of automatic cleaning device, which overcomes these shortcomings, and the structure is more simple. This device has completed the experiment and has been applied to a domestic power station direct air-cooled condenser cleaning system project.

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