Northern Heavy Industries Group

Shenyang, China

Northern Heavy Industries Group

Shenyang, China
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Lin G.,Northeastern University China | Li W.,Northern Heavy Industries Group
Advanced Materials Research | Year: 2010

The jib is an important component for the tower crane. The reliability of the tower crane jib has a direct impact on the safety production. In the current crane industry, the traditional allowable stress method is still the main method for designing tower crane jib. As a result, the reliability of the tower crane jib cannot be given quantitatively. In this paper, by using the probabilistic method, the reliability of a tower crane jib is worked out, and a design way based on the reliability for the tower crane jib is provided. © (2010) Trans Tech Publications.

Wang Z.,Northeastern University China | Yang J.,Northeastern University China | Guan Z.,Northern Heavy Industries Group | Zhao H.,Northern Heavy Industries Group | And 2 more authors.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2014

The rapid and smart manufacturing is the key technology in the current customizing manufacture, especially on multispecies but small amount. A rapidly welding design method was developed using an advanced RRT algorithm. This new method could be divided into task composer and motion planer. The task composer was built to finish more welding lines without moving the frame. And the motion planer was built to calculate the best route without collision from the origin point to the target using less time. This method is verified about five times faster than the current best practices allowed in the task composing and in the route design speed.

Wang W.,Northeastern University China | Zhang B.,Northern Heavy Industries Group | Zhao H.,Northern Heavy Industries Group | Li H.,Northeastern University China
Advanced Materials Research | Year: 2012

Medical titanium plates with smooth surface will be long-standing in body under the condition of free state when it used for bone fixation. To solve this problem, function-surface titanium plates with a certain roughness and shape must be grinded. So ceramic CBN abrasion wheel is used to grind titanium alloy in CNC machining tool and the status of force, heat and vibration in the grinding process will be monitored in the same time. The surface morphology which can meet the growth of tissue could be obtained in a certain technological conditions by observing the grinded surface with super depth of field microscopy devices © (2012) Trans Tech Publications, Switzerland.

Lu F.,HIGH-TECH | Zhang C.,Shenyang Jianzhu University | Sun J.,Shenyang Jianzhu University | Tian J.X.,Shenyang Jianzhu University | And 2 more authors.
International Journal of Engineering Research in Africa | Year: 2016

In order to improve working efficiency of the tunneling process and extend working life of disc cutter, explore the impact of cutter spacing and loading for the cutter rock-breaking effect. With the theory of rock crushing, Based on the finite element analysis software ABAQUS, the process of disc cutter breaking rock is simulated, considering the adjacent cutters sequential constraints, then, to make sure two cutter space with the method of SE in experiment.The simulation results showed that the optimal cutter spacings were both about 80mm in the same loading and the sequentially loading, but the rock-breaking effect of sequentially loading is better than the same loading. The experimental data showed that the minimum specific energy of rock breaking is appeared cutter spacing between 80mm and 90mm. Thus, the correctness and rationality of the simulation was verified. The study is good for understanding the rock-breaking mechanism of double disc cutter and has a certain promoting value to optimize TBM cutter system. © 2016 Trans Tech Publications, Switzerland.

Su C.,Tianjin University | Wang Y.,Tianjin University | Zhao H.,Northern Heavy Industries Group | Su P.,Northern Heavy Industries Group | And 6 more authors.
Advanced Science Letters | Year: 2011

Two typical cutterheads (panel-type and spoke-type) of shield machine are analyzed to investigate the influence of the structures on the mechanical properties when shield tunneling machines work in the same environment with the same tunneling parameters. 3D FEM model is established to model the tunnel excavation, in which the dynamic effect of cutterhead structures is considered during the analysis. The extended Drucker-Prager elastoplastic model is selected for the soil concerning its material nonlinearity, and soil cutting including cutting scrap formation and cutting scrap separation is simulated by using the progressive damage and failure rules, which contain element-deletion function. Finally comparisons based on the numerical simulation results are drawn between the stiffness, strength and weight of the two typical cutterheads under normal working conditions. The results of the simulation provide helpful and useful information for the optimization of topological structure of the cutterheads in manufactural engineering and the selection of the shield machine type in practical engineering. © 2011 American Scientific Publishers.

Zhang Q.,Tianjin University | Kang Y.,Tianjin University | Cai Z.,Tianjin University | Zhao Y.,Northern Heavy Industries Group | And 2 more authors.
Proceedings - 2011 8th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2011 | Year: 2011

The load identification of the shield machine is presented in this paper by introducing the mechanical analysis of shield excavating into the nonlinear multiple regression of on-site data. The analysis on mechanical characteristics of shield-soil system can decouple the nonlinear multi-parameter problem of load, so it is great helpful for the regression process to establish a load model. Then a load prediction model is obtained based on a group of on-site data of subway project in China. In addition the test combined with another group of independent data which is not involved in the regression is carried out. The result shows that the predicted load using the method proposed in this paper agrees well with on-site recorded data. © 2011 IEEE.

Li H.,Northeastern University China | Zhang B.,Northern Heavy Industries Group | Zhao H.,Northern Heavy Industries Group | Wang W.,Northeastern University China
Qinghua Daxue Xuebao/Journal of Tsinghua University | Year: 2012

Rapid forming technology is more and more widely used in tissue scaffold and drug feeding systems. In this paper, 3-D modeling size compensation technology was used to reduce rapid forming tolerance and solve the problem of tolerance inconsistency with respect to repeatable manufacturing technology. The typical experimental work-piece was designed and was made by using an ultraviolet curing machine. The work-piece contains different kinds of size characters in three directions of X, Y, and Z. These character sizes were measured with the factors affecting forming accuracies synthetically analyzed. The results show that the 3-D modeling size compensation technology can effectively control forming accuracies, with the tolerance consistency being increased to 90% and above.

Wang L.,Tianjin University | Wang L.,Academy of Military Transportation | Kang Y.,Tianjin University | Cai Z.,Tianjin University | And 4 more authors.
Tunnelling and Underground Space Technology | Year: 2012

Prediction of disc cutter wear extent is a critical factor for improving the working performance of tunnel boring machines (TBMs). In this study, three TBM working performance parameters are demonstrated to be directly influenced by disc cutter wear and selected as factors that predict disc cutter wear extent; new equations that describe the specific energy (SE) requirement of all disc cutters on the cutterhead are developed, and the SE rule is revealed based on mechanical analysis of the disc cutters as they cut hard rock. Two particular project cases are analysed to verify the above research results. The SE rule varies with disc cutter radius, while the change in disc cutter radius directly reflects the cutter wear extent. Consequently, the cutter wear extent can be predicted utilising the SE rule. Furthermore, the wear mechanism is investigated for the prediction of disc cutter wear extent. Lastly, a novel energy method is established that is based on the SE rule and the wear mechanism. In application, the average wear extent of all disc cutters on the cutterhead can be calculated using the SE equations, and the wear extent of each cutter can be predicted according to wear mechanism and the layout of the disc cutters on the cutterhead. To illustrate the applicability of this energy method, data from on-site Qinling tunnel boring are analysed in detail as an example. The establishment of this method is based on mechanical analysis of the disc cutter as it cuts hard rock; the parameters used in this method reflect rock mass properties and vary from moment to moment as disc cutter wear changes. Therefore, this method is well founded and can be used for real-time prediction of disc cutter wear for hard rock TBMs. © 2011 Elsevier Ltd.

Zhang Q.,Tianjin University | Qu C.,Tianjin University | Kang Y.,Tianjin University | Huang G.,Tianjin University | And 4 more authors.
Tunnelling and Underground Space Technology | Year: 2012

This paper presents an identification and optimization method for the energy consumption of a shield tunnel machine. The specific energy, defined as the energy consumption to excavate a unit volume of the ground, is a good measure of the working efficiency of a shield machine. A model of the specific energy was created using a mechanical analysis before doing an in-site data regression analysis. The mechanical analysis of the shield-ground system helps decouple the nonlinear multi-parameter problem, and then the nonlinear multiple regression process was conducted using in-site data from a subway project in China. Fairly good consistency between the recorded data and the results predicted by the model using the testing data is achieved. Finally, the influence of the cutting depth per revolution on the specific energy was discussed. The optimal ranges of the cutting depth under different geological conditions were provided to improve tunneling efficiency. © 2011 Elsevier Ltd.

News Article | February 15, 2017

BEIJING--(BUSINESS WIRE)--cippe 2017 (the 17th China International Petroleum & Petrochemical Technology and Equipment Exhibition) will be held on March 20-22, 2017 at New China International Exhibition Center in Beijing. With an exhibition area of 100,000m2, the event will gather around 2,000 exhibitors from 65 countries and regions, including 50 Fortune Global 500 companies and 18 international pavilions, to display the latest cutting-edge petrochemical and equipment technologies and products. cippe is an approved member of the Global Association of the Exhibition Industry (UFI) and enjoys the support of China’s Ministry of Commerce. This year as the petroleum industry is setting to revive, cippe will present a more professional, valuable and wonderful event for the industry players. In 2017, apart from the existing Oil Exploration & Development, Offshore Oil & Gas, Offshore Engineering, Oil & Gas Pipeline, Shale Gas, Natural Gas and Explosion-proof Equipment zones, the event will add professional exhibition zones for more market segments, including Valves, Fire Control, Oilfield & Land Conservation, in a bid to build a more precise and professional matching platform for buyers. So far, companies that have confirmed to attend include Caterpillar, NOV, Schlumberger, GE, Honeywell, DOW Chemical, Rockwell, Transneft, Rosneft, Akzo, API, 3M, E+H, MTU, Hempel, CNPC, Sinopec, CNOOC, CSSC, CSIC, CASC, Jereh, Kerui, RG Petro-Machinery, Sany Heavy Industry, Northern Heavy Industries Group, CITIC Pacific, HBP, Jerrywon, LandOcean Energy, Anton Oilfield, Shanghai Shenkai, Tiehu Petromachinery, Tidfore, CNOOC, DS Group and Warom Technology. Building professional forums to help insiders look into the future cippe 2017 will continue to hold the 9th International Petroleum Summit highlighting low-cost development, which will analyze industry prospects and policies to come up with feasible practices and technologies. Multiple other technology seminars and symposiums will be held concurrently. During cippe 2017, the organizer Zhenwei Expo will partner with Xi'an Shiyou University and Shanxi Petroleum Society to hold the 2017 International Petroleum & Petrochemical Technology Conference, covering the full industry chain including offshore petroleum exploration, drilling and producing engineering, oil & gas storage and transportation, etc. Besides, cippe will launch the Middle East session by cooperating with Petroleum Association of Middle East (PAME) and Business Gateways International. LLC., (BGI) of Oman. While BGI Oman will introduce in details about its Joint Supplier Registration System (JSRS) to facilitate Chinese petroleum companies to enter Omanis market, PAME will elaborate on the opportunities, challenges and strategies in the Middle Eastern market. cippe 2017 will attract over 100 buyer and visitor delegations comprised of government institutions, industry associations and companies. Rosneft, Gazprom, Transneft, Saudi Aramco, Statoil, NIOC, INOC, Qatargas, Saudi Aramco, Emirates National Oil, Petronas, KNPC, PDVSA, EVOLEN, PAME, DNV, and other industry associations from the Netherlands, India and France.

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