Compared with ordinary gear transmission, planetary gear transmission has the characteristics of large transmission ratio, high transmission efficiency, stable motion, strong impact resistance and vibration. Planetary gear transmission has been widely used in various construction machinery. Planetary gearing is also used in the middle. The main structure and transmission principle of the pumping unit are shown in 2. The working principle is as follows: the frequency converter converts the power of the natural frequency into frequency. After the transformer is transformed, the motor obtains a certain speed. After the motor is driven by the belt and the gear is decelerated, the gear Z3 obtains a suitable speed. The gear Z3 drives the gear. Z4, the gear Z4 drives the ring gear Z5, and the ring gear Z5 drives the wheel to rotate (Z5, Z6 is fixed on the wheel by bolts), and the wheel drives the shaft to rotate, so that the wire rope reel D3 on the shaft also rotates. The wire rope is wound on the wire rope reel D3, one end of the wire rope is connected with the well rod, and the other end is connected with the weight. As shown, when the gear Z4 meshes with the ring gear Z5, the wire rope reel D3 rotates counterclockwise when rotating to the semicircular gear A. At the point, the stop pin 1 moves to the right under the control of the link mechanism. At this time, the pressure roller will not function, the wire rope reel stops rotating, the planetary gear 4 is connected with the pressure roller, and starts to move around the gear 3, and moves to the B position. The gear 4 is in turn meshed with the large ring gear Z6. Under the premise that the direction of rotation of the gear 3 is unchanged, the large ring gear Z6 drives the wheel, the shaft and the wire rope reel to start clockwise rotation. When turning to the other half of the gear, the stop pin 2 moves to the left under the control of the control mechanism, the pressure roller will not function again, and moves together with the gear 4, the swing arm rotates around the semicircular gear, and after the end of the rotation, the gear 4 is again coupled with the tooth When the ring Z5 is engaged, the wheel, the shaft and the wire rope wheel start to rotate counterclockwise. Because the wire rope wheel rotates counterclockwise and clockwise, the sucker rod and the counterweight realize the linear up and down reciprocating motion in the vertical direction. Oil process.
The application of frequency conversion speed regulation in pumping unit is due to the certain speed of the wheel when the wheel is reversing. When the gear 4 meshes with the ring gear, the moment of meshing with the semicircular gear starts, the mechanical inertia makes the commutation When mechanical shock is generated, in order to overcome the mechanical impact, the rotation speed of the wheel should be reduced when commutating. When the AC asynchronous motor adopts 380V, 50Hz power, speed adjustment cannot be achieved. Therefore, the inverter is powered by the inverter [4-6], and the detection component is used to measure the rotation position of the wheel. According to the difference of the rotation position, the inverter is controlled to adjust the power supply frequency, so that the motor is changed during the commutation. The speed has a suitable value to reduce the mechanical shock during commutation. In addition, the use of frequency converter power supply, can better achieve the acceleration and deceleration of the sucker rod up and down reciprocating motion, so that the sucker rod movement is reasonable, to meet the requirements of the oil well production process.
The basic parameters of the pumping unit are determined according to the motion analysis calculation, and the size parameters of each transmission component are determined as: D1=250, D2=450, Z1=29, Z2=116, Z3=Z4=18, Z5=276, Z6=384, Z0=54, Z7=104, Z8=88, D3=2030 Transmission ratio: i1=D2/D1=1.8, i2=Z2/Z1=4 Up and down stroke transmission ratio: iu=i1i2Z5/Z4=110.4id=i1i2Z6/Z4 =153.6 angle conversion gear ratio: ij=11/13 up and down stroke speed: nu=nj/iu/ij=7.82r/min: nd=nj/id/ij=5.62r/min up and down stroke speed: Vu=D3nu=0.83 m/sVd=D3nd=0.597m/s up and down travel time: tu=h/Vu=7.23std=h/Vd=10.05s commutation time (according to variable frequency speed estimation): tt=3.6s time required for one stroke :t=tu td 2tt=24.48s impulse: n=60/t=60/24.48=2.45 times/min Planetary gear commutation long stroke pumping unit achieves optimal weight, reduces motor capacity and saves energy the best. The AC variable frequency drag technology is adopted, and the well rod movement speed is reasonable, which reduces the damage to the downhole equipment. However, compared with the beam pumping unit, the pumping unit also has some shortcomings. The main reason is that due to the use of frequency converter speed regulation, the microelectronic control system is added, and the reliability is inferior to that of the beam pumping unit. Some measures must be taken to control the protection of the system so that it can work reliably in outdoor open air environment. Increase maintenance on the pumping unit control system. The stroke adjustability of the pumping unit is inferior to that of the beam pumping unit.
The oil wells are distributed in the wild or at sea, and the equipment is installed in the open air. It is time-consuming and labor-intensive to manage and maintain. At present, most oil wells still use manual inspection to conduct oil well monitoring and management. This monitoring and management method is inefficient and costly, and cannot be monitored in real time. It is far from being able to adapt to the needs of oilfield production development. Therefore, the application of remote real-time monitoring systems incorporating wireless communication and intelligent detection technology to oil well monitoring [7] has become an inevitable trend in oilfield development. The following schemes are proposed: (1) Design an on-site data collector to collect the parameters to be monitored in real time [8-9] and compare it with the specified standard values ​​to determine whether there is a fault. (2) Using wireless transmission technology, the wireless communication network is used for information transmission. (3) Develop a set of management software to display the geographical location and number of each oil well in a certain area on the computer screen, and receive the fault information transmitted by the collector, and display the location and fault type of the faulty oil well on the computer screen, and alarm Notify the management personnel to repair the oil well in time.
500mm Stretch Film Machine Unit(stretch and cling film machine)
This mini 500mm stretch film or cling film unit is designed for small output requirment's customers.This group machine is a high-plasticizing ,easy operating,long-life and energy saving cast film machine group,which is mainly used to produce two or three layers LLDPE,PE,CPE cast film for small size 500mm.
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500mm Stretch Film Machine Unit
500mm Stretch Film Machine Unit,500mm Stretch Film Production Line,Small Wrapping Film Maker,Pe Pallet Film Making Machine
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