Papers by Author: Jiang Ping Wang

Abstract: High frequency vibration signal, cylinder-inside pressure and ultrasonic wave are monitored under working condition of a reciprocating compressor. High frequency vibration signal and ultrasonic wave are processed using high frequency band-pass filtering, and then enveloped. The pressure signal is filtered with a low-pass digital filter. The fault causes of the machine can be determined by the enveloped waveform of vibration signal and ultrasonic wave, as well as the pressure curve comprehensively. We can confirm the truth that this fault diagnosis method is accurate and reliable for reciprocating compressors through a number of the results of fault diagnosis.

Abstract: The drilling speed to shorten the drilling cycle plays a decisive role in drilling process.Using the fire-suction hydraulic impactor can achieve percussive-rotary drilling.The fire-suction hydraulic impactor can transform drilling fluid’s pressure energy into mechanical energy.Withing bit static pressure,rotational cutting and vertical impact loading,the way of rock breaking will be faster and more efficient.Using Newton's second law to establish the corresponding kinetic equations,motion equations and displacement equations.The comparison between parameters and measured data validated the correctness of the formulas,which provides a theoretical basis for the products to improve and seriation.

Abstract: Oil-drilling derrick is the most important integrant of the equipments in oil industry and is also a giant load bearing structure. In this paper, the 3D geometric model of the derrick is created by commercial finite element analysis (FEA) software ANSYS, and the static stresses under several working conditions are analyzed. The displacement and stress distribution of the derrick acquired can lay the theoretical basis for the optimization design of structural and material choices of the derrick further.

Abstract: The yarn irregularity of polyester POY in melt spinning influences not only the follow-up spinning property, but also the dyeing performance. The yarn irregularity is caused mainly by unstable state during which the filament is formed. It is presented in this paper that the main factors which affect the filament unevenness in melt spinning. They are the quality of raw materials, the improper choice and fluctuation of technological parameters, the structure of equipments and running conditions, etc. Such factors as steady spinning temperature, quenching conditions, the high performance finishes, proper collection oiling point and correct operation will guarantee lower filament unevenness.

Abstract: Yarn unevenness is one of the important indexes which presents the evenness of polyester POY filament and affects the performances of the filament. The principle of capacitive evenness tester Uster and the measurement method are described in this paper. The influences of operating environment and the measuring conditions on determining the unevenness of polyester POY filament are discussed. The reasonable conditions are also pointed out, which will have the directive function for the evenness test work with Uster.

Abstract: This paper focuses on drilling fault diagnosis with the technology of information fusion based on neural network and Dempster-Shafer evidence theory. Neural network is used to process the drilling engineering data monitored from drilling on-site. The primary diagnosis results of drilling faults can be obtained by comparing the outputs of the neural network. And also the outputs of neural network are utilized to construct a basic probability assignment function (mass function) to assign a value of mass function for each type of drilling faults. The final fault diagnosis results will be achieved by using Dempster-Shafer evidence theory on decision level through further reasoning primary diagnosis results of neural network. The proposed method can in time discover the engineering data whether abnormal so that can diagnose and classify them, and will improve the accuracy of the drilling fault diagnosis.

Abstract: Combining the advantage of 3D design software Pro/E in modelling with the ability of finite element analysis (FEA) software ANSYS in analysis and calculation, this article builds 3D solid model with Pro/E, then imports the model into ANSYS through interface technology, finally establishes the FEA mechanical model of the elevator link. The stress distribution of elevator link under rated load is achieved by using ANSYS to analyze and calculate. The calculated results can be used to revise the design, improve the specific structural parameters, check and analyze the improved elevator link, thus improve the tensile and bending property of elevator link, provide reliable basis for reasonably designing and retrofitting the ring structure.

Abstract: Three-dimensional solid model of a turntable of a drilling rig is built utilizing the modeling functions of an engineering software SolidWorks. The virtual assembly for every components of the turntable is accomplished with the given assembly sequence in SolidWorks environment. The motion simulation and animation of simulation processes for the turntable under given conditions are carried out with module SOSMOSMotion of SolidWorks, and the dynamic interference check is also completed, so as to guarantee the correctness of the part design and improve the overall design efficiency, accuracy and intuitiveness. The study of assembly and motion simulation of the turntable based on SolidWorks can lay the foundation for communication and evaluation of design process as well as the manufacturing of the overall drilling rig.

Abstract: This paper depicts a boring and trepanning association (BTA) deep-hole drilling system with near-dry cutting technique. The cutting tests are carried out in view of the machining performances under the condition of applying the compressed air and atomized cutting fluid for drilling deep holes on titanium alloy which is difficult to cut. Several cutter materials have been utilized in the tests. The reasonable material of the deep-hole drilling cutter has been determined by analyzing the cutting force, the cutter wear and the surface finish. Environmental pollution decreases owing to little cutting fluid consumption in near-dry cutting system.

Abstract: Focusing on the difficult-to-cut characteristic of titanium alloy, this paper selects several cemented carbide tool materials in the tests of machining the titanium alloy workpieces. Different sets of geometrical parameters of the drilling bits are grouped, chosen and optimized, and then deep-hole drilling tests are carried out. The suitable cutter materials and the optimum geometrical parameters of the cutter for drilling deep holes in titanium alloy have been determined through the analysis of tested results.