60 years ago, “Yulin Quantang Industrial Co., Ltd.â€, 60 years later “China's green power capitalâ€, after 60 years of business development and accumulation, Yuchai has now become a modern international large-scale enterprise group, domestic product spectrum The most comprehensive manufacturing base for internal combustion engines and the most complete hydraulic excavator manufacturer in China. In the past 60 years, what has made Yuchai change from small to large and from weak to strong? Mr. Zhong Yuwei, deputy general manager of Yuchai, repeatedly referred to the word “competitiveness†when he was interviewed by the editor-in-chief of China Truck Network. He said: "Each company is faced with the issue of how to enhance its core competitiveness. Yuchai's vision is to become the most competitive professional power supplier in the world." It is under this goal that Yuchai In the areas of products, talents, culture, and management, we have continuously developed and precipitated our efforts to enhance our competitiveness and completed the transformation from small to large and from weak to strong. Yuchai Deputy General Manager Mr. Zhong Yuwei Product Competitiveness: Leading Application From the 6105Q diesel engine in 1980 to today's 22 major series of 7 platforms, to the Yuchai Euro 6 engine, the leading technology-based future product, Yuchai's products have been pursuing “leadership and application.†Vice President Zhong Yuwei believes that Sexual leadership is the biggest advantage Yuchai Engine has accumulated over the past 60 years." Zhong Yuwei stated frankly that Yuchai has an obvious advantage in the medium-sized engine market, but there is still much room for development in the light and heavy engine market. Yuchai began to gradually adjust its product structure in 2005. While consolidating and expanding the market share of existing medium-sized products, we will increase investment in blank products, such as light-vehicle diesel engines and heavy-duty vehicle engines; and accelerate research and development of new energy power products, such as gas engines (CNG, LPG), Dual-fuel engines and hybrids, etc., and occupy the technical commanding height represented by energy saving and environmental protection. In recent years, Yuchai’s R&D of new products has increased at a rate of 20%. In 2010, 171 new product developments were completed and sales of new products accounted for more than 60%. On the occasion of the 60th anniversary of Yuchai, the 4.6 millionth engine and the 30,000th clean energy YC6LN-50 engine were rolled out. This is another milestone in the history of Yuchai's engine products, marking Yuchai’s “green†"Development" took another new step. Talent competitiveness: science and technology Yuchai “From managers to technicians to grassroots technicians, different levels of talent are important factors that support Yuchai’s continued development.†Zhong Yuwei said. Talent is the primary productive force. This sentence is regarded by all companies as the most simple action plan in Yuchai and is deeply rooted in the hearts of each leader and manager. Zhong recalled 1992. At that time, Yuchai gave experts with outstanding contributions a salary of 100,000 a year, a house and a Santana. “Which unit has such a sense of deterrence at that time?†Zhong always expressed his pride, and Yuchai later rewarded the contributing employees with various methods such as negotiating wages, agreement purchases, annuities, and scientific and technological progress awards. Since 2000, scientific research investment has always accounted for more than 3% of Yuchai Group's annual sales, which has effectively promoted the rapid and healthy development of the company. At present, Yuchai has built a top R&D team in the internal combustion engine industry. The Yuchai Engineering Research Institute established in 2007 has become the core department of Yuchai's innovative R&D system, and its R&D and innovation capabilities are among the leading domestic companies. A major breakthrough has been made in the research of diesel engine development frontier technologies, and the industrial technology guiding role has been fully utilized. It is rich in commercial, passenger, high-power, non-road engine engines, gas engine development, hybrid power system development, marine electric engine, complete vehicle design, emission (including post-processing) electronic control calibration development, engine testing, etc. The practical experience has always led the industry in terms of product development and technological innovation. New products developed independently have filled the gaps in domestic automobile engines in various fields and contributed to the development of the industry. Cultural Competitiveness: Development and Inclusion When asked by reporters, from a small factory to a large group today, during the 60 years of development, what was the main driving force for supporting Yuchai’s take-off was when Zhong first mentioned the entrepreneurship of Yuchai people and Culture: Innovative, inclusive and able to provide employees with a platform for their career. Jiazi Yuchai, self-improvement. Yuchai people's spirit of continuous self-improvement passed down from generation to generation, gradually forming Yuchai's unique corporate culture. Yuchai’s corporate culture is always moving forward. From the core concept of “people-oriented, contending for the first, and the starting point†that originally focused on self-development, to the “green development and harmony that pays more attention to social responsibility and win-win development†put forward in 2006. The "win-win" core philosophy has enabled Yuchai to comply with the requirements of economic development in the new era and has successfully achieved innovation in its core concepts. In 2008, Yuchai put forward the business philosophy of “Excellent Quality, International Yuchaiâ€. We must improve the core competitiveness of the company with excellent team quality, excellent cultural quality, excellent product quality and excellent service quality. The "China Created" high quality quickly explores the international market, accelerates the process of internationalization, and realizes the dream of a large multinational corporation as soon as possible. The 60-year history of Yuchai is the history of continuous development and growth of the company, and also the history of the growth and maturity of corporate culture. Not only has Yuchai achieved tremendous successes, it has created one miracle after another and forged an excellent corporate culture, which has enabled Yuchai to display an infinite vitality and vitality on the stage of China and even internationalization. Its core philosophy of "Green Development, Harmony and Win-Win" and the management philosophy of "Excellent Quality and International Yuchai" have become the banner of Yuchai's development and lead the company's continuous internationalization. Management Competitiveness: Institutional Innovation The establishment of a modern enterprise management system is particularly important for competitive state-owned enterprises. Since 2005, Yuchai has strengthened the innovation of modern enterprise system management. Specifically, it includes: establishing a new concept of "green development, harmonious and win-win"; carrying out industrial restructuring; strengthening the target responsibility system; establishing a large group control model; building a talent introduction training system; and building a compensation platform. From the institutional perspective, Yuchai’s rapid development has been guaranteed. Zhong Zhong introduced the Yuchai’s quality management system and quality strategy implementation to reporters of the China Truck Network: “Yuchai has been attaching great importance to product quality since the 1980s, including the Three Guarantees Service Mileage, which is ahead of its peers. Truly realizing the improvement of product quality, in line with international standards, Yuchai proposed a three-year quality strategy. In October 2011, Yuchai implemented lean production management, including cost management, quality management, and production efficiency management.†Since 2005, under the guidance of the new concept of “Green Development, Harmony and Win-Win†and the business philosophy of “Excellent Quality and International Yuchaiâ€, Yuchai has continuously strengthened its internal management foundation and strengthened the innovation of modern enterprise system management. Reform and innovation in labor, personnel, distribution, strategic management and other aspects. The 60-year-old Yuchai has a history of thick and protracted struggle. It is a long-established culture. After 60 years of inheritance and development of Yuchai people, Yuchai's brand value has reached 9.869 billion yuan. "Yuchai Machinery" has become a representative of China's power, and the realization of the vision of building the most competitive professional power supplier is not far behind.
Service Scope: Steam Turbine spare parts supply; steam turbine installation, inspection & overhaul, technological upgrading, turbine technology training, turbine low oil pressure renovation, turbine rotor shaft bend restoration, lower turbine`s vibration and noise, remove speed governing system abnormal volatility or load swing, solve turbine insufficient output, discontent load or other common/exceptional faults.
Contract to overhaul and all kinds of turbine`s remould, turbine dynamic balance and so on, for satisfying practical operation requirements.
Provide technical support and service for operation, inspection, maintenance, accident treatment and so on.
1. Steam Turbine Maintenance/Overhaul Service
Steam turbine normal overhaul, failure treatment; main body components repair, heat exchange tubes of cooler replacement and so on.
2. Technical guidance
Generating or Industrial driving turbine inspection, overhaul, upgrading and other items technical guidance.
3. Thermodynamic System Optimizing Services
For operating or planning projects or equipment, according to end users` actual CHP(or heat-work cooling) requirements, make cycle efficiency analysis, provide system optimizing service.
4. Speed Governing System Remould
Upgrade old hydraulic governing system to digital electro-hydraulic governing system, satisfy flexi-ble configuration all kinds of control strategy requirement.
5. Flow Passage Optimization and Modification
Total modification for steam turbine shall increase old turbine`s economic efficiency with advanced technology, service life also shall be extension.
6. Turbine Parameters Remold and Modification
Apply to processing or procedure transformation (or project site change) cause turbine operation parameters` change.
7. Uncontrolled extraction steam reconstruction
Consideration of turbine security and economic, open a hole for extraction steam normally in order to heat supply reformation.
8. Steam Turbine Engineering Service
Provide small & middle size Steam Turbine Generator or industrial steam turbine complete set engineering, project design and project installation service.
9. Vibration Analysis and Rotor Dynamic Balance
24Hours Service for emergency vibration analysis and wide range rotor dynamic balance service at project site or back to factory.
10. Condensing (extraction condensing) type remodel to back pressure type
Condensing (extraction condensing) steam turbine remodel to back pressure steam turbine
11. Steam Turbine Vacuum System Upgrade
Condenser three-dimension design and upgrade, reduce heat-transfer temperature difference, increase steam exhaust vacuum degree, improve turbine economic efficiency. Water cooling remodel to air cooling.
12. Steam Turbine Enlargement Capacity Reconstruction
Reconstruct the turbine`s capacity which are caused by system or equipment changing.
13. Motor Speed Governing Variable-frequency Remould
Variable-frequency drive remould for pump systems of all kinds of industrial and mining enterprises.
14. Domestic Equipment Reconstruction
Domestic equipment reconstruction for imported turbine
15. Circulating Cooling Water System Optimization and Modification
Optimization and modification of operating circulating cooling water system, reduce operation energy consumption rate.
16. Waste Heat Steam Turbine Gland Seal System Upgrade
After upgrade, steam leakage ( effect gear box oil quality) shall be improved by the reason of waste heat parameters are not stable.
17. Spare Parts Marketing
Normal easily damaged parts warehouse, shorten delivery time.
Case 1
A fertilizer company has 2 sets of steam turbine, model are: CB6-3.43/1.27/0.294 and CB6-3.43/1.17/0.294. Because end user`s power load and steam consumption are changed, the turbines must be reconstructed according to steam parameters, flow change and guarantee high efficiency.
Remould Parameters: turbine max. inlet steam is 100t/h, when inlet steam is 97t/h and inlet pressure is 3.15MPa(g), its extraction steam is 62t/h extraction pressure is 1.51MPa(g), exhaust pressure is 0.21MPa(g), guarantee output is 5800KW (deviation±5% ).
Main job of remould and overhaul:
1. Casing was sent back to manufacture`s factory for rebuilding 2 valve seat hole, expand nozzle block steam passage.
2. Change nozzle block, take out guide blade carrier.
3. The original double row governing stage impeller and blade was changed to single row governing stage impeller and blade, add governing stage sheath, parts of rotor sleeve need to be changed and adjusted.
4. LP stage 3rd diaphragm steam passage inspection optimization.
5. Casing and rotor dismounting and assembling in factory with comprehensive inspection.
6. Rotor low speed dynamic balance test.
7. Governor static test in factory, overspeed test.
8. Dismount & assembly, overhaul at project site.
9. Clear incrustation for steam governing valve, nozzle and blade.
10. Gland seal inspection and replacement, gland sealing clearance adjustment, change the seal block which was severe wear, spring leaf which are damaged should be changed.
11. Every bearing repair and adjust.
12. HP & LP governing steam valve grinding, stroke adjustment.
13. Front bearing pedestal dismounting and inspection, patch oil leaking points.
14. Inspection and patching steam leaking of HP steam governing valve link rod.
15. Turbine mainbody troubleshooting.
After remolding is complete, the 2 turbine sets are running very well.
Case 2
There is a paper mill which has a set of steam turbine: B6-3.43/0.981. Due to processing consumption in workshop and load were changed, the end user request reset new back pressure and achieve the best efficiency within the shortest time.
Parameters reform to: when rated inlet flow: 55t/h, inlet pressure: 3.43±0.2MPa(a), exhaust pressure: 0.59MPa(a), steam rate guarantee value must be 11.65kg/(kw·h), output power must be 4700KW under rated working condition. The reconstruction project is a turnkey project, from preparing components to dismount heat material, equipment dismounting and installation, till to equipment commissioning successfully.
For reducing the work amount, keep casing and pipelines still, main jobs are following:
1. Change front & rear gland seal and diaphragm seal.
2. Change main shaft assembling (keep mail oil pump and coupling still).
3. Change HP nozzle block, HP guide blade carrier and original 2 stage diaphragm, add 3 stage diaphragm, 5 stage diaphragm adopts special design for satisfy the requirement.
4. Change the original 3 stage impeller and add another 3 stage impeller.
5. Steam governing valve link rod adjust inlet steam, check all butterfly valves matching conditions, improper ones should be changed.
6. Original rotor`s coupling, MOP shall be mounted in new rotor.
7. Rotor balance.
8. Change sylphon of governing system.
9. Change pressure transducer sleeve, adjust hydraulic servo-motor stroke.
10. Governor static test in factory.
11. Clear oil system.
The reconstructed steam turbine is B4.7-3.43/0.59, end user evaluates steam rate, vibration, exhaust temperature very strictly, but the reconstructed steam turbine is running very well and fully meet the design performance.
Steam Turbine Care,Steam Turbine Services Shandong Qingneng Power Co., Ltd. , http://www.qnpturbines.com