The Dynamic Simulation of Vibration Process of the Top Drive System of the JDD-100 Type Drilling Rig Based on ADAMS

Ping YU1, a, Zhi Hui XIAO1,b ,Yao Hua WANG1,c , Dong Yu LIU2,d 1Jilin University, Changchun, Jilin Province 130022, P.R. China

2Air Force Aviation University, Changchun, Jilin Province 130022, P.R. China

ayp@jlu.edu.cn, bxiaozhihui19882006@126.com,wangyaohua012@126.com

Keywords: Top drive system, ADAMS, Exciting force

Abstract. We studied the high frequency vibrator of the top drive system based on ADAMS. A

parameterized simulation model of the axial rotation of gears and eccentric block is established, and

dynamic change of the impact and the actual movement of the rotating components of the top drive

system are analyzed. Then create a virtual prototype on the basis of that. It can obtain curves that

some parameters change relative to time, such as the exciting force and the centroid position of

eccentric block. Thus it achieves dynamic simulation analysis of virtual prototype of the top drive

system.

Introduction

The essence of drilling is that the top drive system drives drill stem and the drill to produce a

periodic exciting force. It makes the drill stools produce vertical static load and dynamic load which

is generated by high frequency shock vibration to the stratum. Thus the drill enters geotechnical

layer to achieve drilling. The top drive system uses biaxial and double round vibrator (Fig. 1). It

applies centrifugal force which is generated by high speed rotating of eccentric weight driven by

two motors to produce exciting force. The magnitude of the exciting force affects directly the speed

and depth of drilling. Therefore, studying the vibration process of the top drive system is the

premise of enhancing drilling performance and ensuring drilling rig to work normally.

ADAMS Software Profile

ADAMS (Automatic Dynamic Analysis of Mechanical System) software is the most excellent

dynamic simulation software of mechanical system, which is developed by American Mechanical

Dynamics Inc. Using ADAMS software, one can quickly and easily create fully parametric

geometric model of mechanical system. Then, we can impose movement incentives on the

geometric model. Finally, we implement a set of movement simulation testing very close to the

actual situation. Test results are the simulated actual movement of the working mechanical system.

It can complete the construction and testing of the virtual prototype in a very short period of time.

And we can know how prototypes of various designs work before the construction of the physical

prototype.

Establish Simulation Model of the Top Drive System

Creating a three-dimensional solid model in Solidworks. A complete top drive system consists

of many components. According to the focus of this analysis, we can ignore some minor factors and

retain some important factors. It is as follows.

(1) The various components of the entire top drive system can be considered as a rigid body.

(2) Simplify the motor and box under the premise of guaranteeing quality, and ignore the

mounting holes which have no great impact on the entire movement.

(3) Omit the key at the gear and shaft.

(4) All the parts on the rack are considered as a whole.

Using Solidworks creates a simplified model of the top drive system (Fig. 2).

Advanced Materials Research Vols. 328-330 (2011) pp 305-308Online available since 2011/Sep/02 at www.scientific.net© (2011) Trans Tech Publications, Switzerlanddoi:10.4028/www.scientific.net/AMR.328-330.305

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Fig. 1 Biaxial and Double Fig. 2 A three-dimensional solid model Fig. 3 Motion constraint

round vibrator of the top drive system in simulation model

Introduce the three-dimensional model. Save the model file as parasolid format in Solidworks.

The file names are all English characters. Replace *.x_t with *.xmt_txt, select the file types which

are saved before in the import dialogue of ADAMS, point to the file, select model name in the

complex box, click the right button, select model and select create. Solidworks file will be imported

into ADAMS successfully.

Give each part of the top drive system corresponding materials and properties after the model is

imported. The materials of parts in the top drive system are shown in table 1. According to the

material properties and volume of the three-dimensional model, quality properties are automatically

generated.

Table 1 The quantity and materials of the parts in the top drive system

No. Name Material Quantity

1 Sleeve Q235-A 2

2 Flat Key 45 6

3 One axis 45 1

4 Bearing cap Q235-A 2

5 Second axis 45 1

6 Gland Q235-A 2

7 Eccentric block 35 4

8 Gear Fiberglass reinforced nylon6 resin 2

9 Box ZG270-500 1

10 Drilling hammer 45CrNiMoVA 1

Establish Constraint Institutions

According to the structure of the movement of the top drive system, it may impose the following

constraints.

(1) Fixed vice: The fixed constrains between rail base of the top drive system vibrate up and

down with ground; the fixed constrains between gear with axis; the fixed constrains between

eccentric block with axis.

(2) Mobile vice: The mobile constrains between box of the top drive system with rail base.

(3) Rotating vice: The rotating constrains between axis with bearing.

(4) Gear pair: The constrains between two gears and its drive ratio is 1:1. The gear pair consists

of two mobile vice, three components and a marking point of speed reference. Two mobile vice are

the rotating vice which are added to two gears. Three components consist of two gears and box. The

Z-axis direction of the marking point of speed reference must point to the direction of the gear

meshing.

(5) Driving vice: The constrains which are added to gear 1 make gear1 become the drive gear.

The locations of the constraints are shown in Fig. 3.

306 Mechatronics and Materials Processing I

Dynamic Simulation and Analysis in the Top Drive System

Enter 2.0 s as the simulation time and step=50 as the step of simulation work . Give the gear a

motion incentive, namely the rotate speed that the motor gives to the gear in simulation analysis.

The results of simulation are as follows.

(1) The centroid position of eccentric block centers at -52 mm relative to the X-axis, and it

ranges from -61 mm to -43 mm periodically. It is shown in Fig. 4.

Fig. 4 The centroid of eccentric block X-Time curve

(2) The curve of the centroid position of eccentric block relative to the Y-axis is irregular. It

ranges from 12 mm to 45 mm. It is shown in Fig. 5.

Fig. 5 The centroid of eccentric block Y-Time curve

(3) The speed of gear is constant and its angular velocity is 16800 o/s. That is to say, the speed of

motor is 16800 o/s. It is shown in Fig. 6.

Fig. 6 The speed of gear-Time curve

(4) The centroid position of box fluctuates, and the difference between the maximum and

minimum in each vibration is 8 mm. It is amplitude. It is shown in Fig. 7.

Fig. 7 The centroid position-Time curve

(5) The centroid position of box and change of exciting force are linear relationship. When the

exciting force is 0, the centroid of box is in the equilibrium position. It is shown in Fig. 8.

Advanced Materials Research Vols. 328-330 307

Fig. 8 Exciting force-Time curve of the top drive system

Conclusions

We create a three-dimensional model of the top drive system by Solidworks and import it into

ADAMS, and then create a virtual prototype on the basis of that. It can obtain curves that some

parameters change relative to time, such as the exciting force and the centroid position of eccentric

block. We get that the magnitude of exciting force is 16.7 KN. Thus it achieves dynamic simulation

analysis of virtual prototype of the top drive system. It provides some key data to simulate the

movement of the physical prototype and develop the top drive system.

Acknowledgements

This work is supported by the project of Geologic Survey Bureau of China.

The Source of Project

The project of Geologic Survey Bureau of China (serial number of the project: K(2005)013-14)) :

Geophysical parameters measurement-while-drilling system and the development of drilling rig.

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308 Mechatronics and Materials Processing I

Mechatronics and Materials Processing I 10.4028/www.scientific.net/AMR.328-330 The Dynamic Simulation of Vibration Process of the Top Drive System of the JDD-100 Type Drilling

Rig Based on ADAMS 10.4028/www.scientific.net/AMR.328-330.305