CN208396695U - A kind of oil pump energy-saving Servocontrol device - Google Patents
A kind of oil pump energy-saving Servocontrol device Download PDFInfo
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- CN208396695U CN208396695U CN201821043459.XU CN201821043459U CN208396695U CN 208396695 U CN208396695 U CN 208396695U CN 201821043459 U CN201821043459 U CN 201821043459U CN 208396695 U CN208396695 U CN 208396695U
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Abstract
The utility model discloses a kind of oil pump energy-saving Servocontrol devices, including monitoring device and motor, the monitoring device includes microcontroller, touch screen, wireless communication module and motor control module, the motor control module includes industrial frequency control module and servo frequency control module, the output of the microcontroller is terminated with infrasonic wave generator, jig frequency adjusts indicator light, balance weight adjusts indicator light, balance motor module and compensating electric capacity module, the input of the microcontroller is terminated with infrasound receiver, ascending current sensor, centrifugal current sensor, load transducer and displacement sensor, and proximity Hall switch, three-phase voltage sensor and three-phase current sensor.The utility model structure is simple, integrates oil well fault detection, pumpingh well hydrodynamic face, balance of well pumping unit degree, pumping unit power factor and beam-pumping unit jig frequency, guarantee pumpingh well efficiently, low-power consumption, safe operation, reduce energy waste.
Description
Technical field
The utility model belongs to oil pump energy-saving control technology field, and in particular to a kind of oil pump energy-saving SERVO CONTROL dress
It sets.
Background technique
Pumping unit is a kind of machinery equipment for exploiting petroleum, is commonly called as " kowtowing machine ", so that petroleum is gone out well by the method for pressurization.
Pumping unit of well is main continuous work equipment in oil exploitation, needs 24 hours uninterrupted line-break, but at present to oil pumping
The monitoring of machine also needs staff's scene inspection and adjusts the working condition of pumping unit, brings biggish labor to staff
Fatigue resistance is costly and inefficient；Further more, big in oil mining oil reserve early period, hydrodynamic face is high, oil well liquid-supplying foot, motor
The fixed rotating speed operation under fixed frequency is adopted, guarantees higher oil production, but as exploitation enters mid-term and later period, due to
Petroleum oil reserve is reduced, and hydrodynamic face is low, easily causes feed flow insufficient, if if motor continues working under current frequency state
Electric energy certainly will be wasted and cause unnecessary loss；In addition, the jig frequency of pumping unit is that measurement pumping unit is fast during pumping production
Slow parameter, but the jig frequency of pumping unit cannot obtain in time and adjust the jig frequency of pumping unit at present, will cause system effectiveness
It is low；Finally, usually there is pumping unit non-equilibrium state in the pumping unit course of work, so that motor be made to generate excessive rush
Electric current is hit, a large amount of electric energy is not only slatterned, but also seriously threatens the safety of motor speed adjusting control equipment.Therefore research one
Kind oil pump energy-saving Servocontrol device, collects oil well fault detection, pumpingh well hydrodynamic face, balance of well pumping unit degree, pumping unit function
Rate factor and beam-pumping unit jig frequency in one, guarantee pumpingh well efficiently, low-power consumption, safe operation, reduce energy waste.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of oil pumping
Machine energy-saving servo control device, simple structure and reasonable design and easy to use, the detection of collection oil well fault, pumpingh well
Hydrodynamic face, balance of well pumping unit degree, pumping unit power factor and beam-pumping unit jig frequency in one, guarantee pumpingh well efficiently, low-power consumption, peace
Row for the national games reduces energy waste.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of oil pump energy-saving SERVO CONTROL
Device, it is characterised in that: including the motor that monitoring device and driving pumping unit are pumped, the monitoring device includes micro-control
Device processed, the touch screen to connect with microcontroller and the wireless communication module with mobile phone wireless data communication, and to motor into
The motor control module of row control, the motor control module includes industrial frequency control module and servo frequency control module,
The input terminal of the industrial frequency control module and the servo frequency control module connects with 380V power supply, the power frequency control
Molding block and the servo frequency control module are controlled by microcontroller, and the output of the microcontroller is terminated with infrasonic sound
Wave producer, jig frequency adjust indicator light, balance weight adjusts indicator light and the balance motor module for adjustment block position, with
And the compensating electric capacity module for adjusting motor power factor, the input of the microcontroller be terminated with infrasound receiver,
Ascending current sensor, centrifugal current sensor, load transducer and displacement sensor and proximity Hall switch, for examining
Survey the three-phase voltage sensor of motor three-phase voltage and the three-phase current sensor for detecting motor three-phase current.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the balance motor module includes balance
Motor driver and the balance motor to connect with the balance motor driver output end, the balance motor and balance weight are driven
Connection, the input terminal of the balance motor driver connect with the output end of microcontroller.
A kind of above-mentioned oil pump energy-saving Servocontrol device, it is characterised in that: the output end of the 380V power supply
It is connected to the first breaker, the servo frequency control module includes the second breaker, servomechanism and connects with servomechanism output end
First contactor, the industrial frequency control module include third breaker and with third breaker output end connects second contacts
Fuse, the first contactor are provided between the output end and motor of device, the first contactor and second contactor
Connect with the output end of microcontroller with the input terminal of second contactor, output end and the third open circuit of first breaker
The input terminal of device and the second breaker connects, and the servomechanism carries out data communication by serial communication modular and microcontroller.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the compensating electric capacity module includes compensation
Capacitor and the third contactor being serially connected in compensation capacitor circuit, the input terminal and microcontroller of the third contactor are defeated
Outlet connects.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the microcontroller is single-chip microcontroller or PLC
Module.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the infrasonic wave generator includes chip
NE555, the infrasound receiver are CASI-FPS-2011 infrasound receiver.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the load transducer is CSF-GYA load
Lotus sensor, institute's displacement sensors are YH-360DC displacement sensor.
Above-mentioned a kind of oil pump energy-saving Servocontrol device, it is characterised in that: the three-phase voltage sensor is GST-
DJ-S60 three-phase voltage sensor, the three-phase current sensor are GST-DJ-S63 three-phase current sensor；The uplink electricity
Flow sensor and centrifugal current sensor are KCE-VJ03 current sensor.
Compared with the prior art, the utility model has the following advantages:
1, used oil pump energy-saving Servocontrol device simple structure and reasonable design and input cost is lower.
2, used oil pump energy-saving Servocontrol device is full-featured, is received by infrasonic wave generator and infrasound
Device, can obtain pumpingh well hydrodynamic face, can obtain pumping unit power factor by three-phase voltage sensor and three-phase current sensor,
The degree of balance that pumping unit can be obtained by ascending current sensor and centrifugal current sensor is passed by load transducer and displacement
Sensor at pumping unit horsehead suspension point load and displacement be measured in real time, realize oil well fault detection, connect by Hall
Nearly switch realizes the detection of beam-pumping unit jig frequency, guarantee pumpingh well efficiently, low-power consumption, safe operation, reduce energy waste.
3, used oil pump energy-saving Servocontrol device is easy to use, realizes pumping unit by each sensor
The detection of running parameter carries out and is sent to microcontroller, handles convenient for microcontroller analysis, avoids staff scene to pumping
The running parameter of oil well is monitored, saving of work and time, and convenient for adjusting pumping unit in time, reduces pumping unit energy consumption.
4, used oil pump energy-saving Servocontrol device using effect is good, realizes motor by motor control module
Power frequency and variable frequency work the power factor of motor improved by compensating electric capacity module, realized by balance motor module flat
The adjusting of weighing apparatus block improves the degree of balance, reduces the energy consumption of pumping unit as far as possible.
In conclusion the utility model simple structure and reasonable design and easy to use, the detection of collection oil well fault,
Pumpingh well hydrodynamic face, balance of well pumping unit degree, pumping unit power factor and beam-pumping unit jig frequency guarantee that pumpingh well is efficient, low in one
Power consumption, safe operation reduce energy waste.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the utility model.
Fig. 2 is the utility model motor control module, motor, compensating electric capacity module, the first breaker and servomechanism
Circuit diagram.
Description of symbols:
1-microcontroller；2-infrasonic wave generators；3-infrasound receivers；
4-three-phase voltage sensors；5-three-phase current sensors；6-ascending current sensors；
7-centrifugal current sensors；8-load transducers；9-displacement sensors；
10-the first breaker；11-the second breaker；12-third breakers；
13-serial communication modulars；14-servomechanisms；15-second contactors；
16-first contactors；17-fuses；18-motor；
19-balance weights；20-third contactors；21-compensation capacitors；
22-jig frequencies adjust indicator light；23-balance weights adjust indicator light；24-touch screens；
25-wireless communication modules；26-mobile phones；27-380V power supplies；
28-balance motor drivers；29-balance motors；30-proximity Hall switch.
Specific embodiment
As shown in Figure 1, a kind of oil pump energy-saving Servocontrol device, including monitoring device and driving pumping unit are pumped
Motor 18, the monitoring device includes microcontroller 1, the touch screen to connect with microcontroller 1 24 and wireless with mobile phone 26
The wireless communication module 25 of data communication, and to the motor control module that motor 1 is controlled, the Motor Control
Module includes industrial frequency control module and servo frequency control module, the industrial frequency control module and the servo frequency control module
Input terminal connect with 380V power supply 27, the industrial frequency control module and the servo frequency control module are by micro-control
Device 1 processed is controlled, and the output of the microcontroller 1 is terminated with infrasonic wave generator 2, jig frequency adjusts indicator light 22, balance weight
Indicator light 23 and the balance motor module for 19 position of adjustment block are adjusted, and for adjusting 18 power factor of motor
Compensating electric capacity module, the input of the microcontroller 1 is terminated with infrasound receiver 3, ascending current sensor 6, downlink electrical
Flow sensor 7, load transducer 8 and displacement sensor 9 and proximity Hall switch 30, for detecting 18 three-phase electricity of motor
The three-phase voltage sensor 4 of pressure and three-phase current sensor 5 for detecting 18 three-phase current of motor.
In the present embodiment, the balance motor module include balance motor driver 28 and with the balance motor driver
The balance motor 29 that 28 output ends connect, the balance motor 29 are sequentially connected with balance weight 19, the balance motor driver
28 input terminal connects with the output end of microcontroller 1.
In the present embodiment, the wireless communication module 25 is WIFI wireless communication module.
In the present embodiment, the balance motor driver 28 is MLDS2410A motor driver, and the balance motor 29 is
60GP-60BL2445C direct current generator.
In the present embodiment, the balance motor 29 is sequentially connected by belt and balance weight 19.
In the present embodiment, the output of the 380V power supply 27 is terminated with the first breaker 10, the servo frequency conversion control
Molding block includes the second breaker 11, servomechanism 14 and the first contactor 16 to connect with 14 output end of servomechanism, the power frequency
Control module includes third breaker 12 and the second contactor 15 that connects with 12 output end of third breaker, first contact
Fuse 17, the first contactor 16 and are provided between the output end and motor 18 of device 16 and second contactor 15
The input terminal of two contactors 15 connects with the output end of microcontroller 1, and the output end and third of first breaker 10 are disconnected
The input terminal of road device 12 and the second breaker 11 connects, the servomechanism 14 by serial communication modular 13 and microcontroller 1 into
Row data communication.
As shown in Fig. 2, first breaker 10 is circuit breaker Q F1, and second breaker 11 is disconnected in the present embodiment
Road device QF2, the third breaker 12 are circuit breaker Q F3.The first contactor 16 is contactor KM1, second contact
Device 15 is contactor KM2, and the third contactor 20 is contactor KM3, and the fuse 17 is fuse FR, the breaker
The output end of QF1 is defeated with the input terminal of circuit breaker Q F2, the input terminal of the normally opened contact of contactor KM3 and circuit breaker Q F3 respectively
Enter end to connect, the output end of the circuit breaker Q F2 connects with servomechanism 14, the output end of the normally opened contact of the contactor KM3
Connect with one end of compensation capacitor 21, the other end of the compensation capacitor 21 ground connection, the output end of the circuit breaker Q F3 with
The input terminal of the normally opened contact of contactor KM2 connects, and the output end of the servomechanism 14 is defeated with the normally opened contact of contactor KM1
Enter end to connect, the output end of the normally opened contact of the output end and contactor KM2 of the normally opened contact of the contactor KM1 with fusing
The input terminal of device FR connects, and the output end of the fuse FR connects with motor 18.
In the present embodiment, the compensating electric capacity module includes compensation capacitor 21 and is serially connected in 21 circuit of compensation capacitor
Third contactor 20, the input terminal of the third contactor 20 connects with 1 output end of microcontroller.
In the present embodiment, the compensation capacity of the compensation capacitor 21 is according to the minimum reactive power of actual measurement of motor 18
90% determines.
In the present embodiment, the microcontroller 1 is single-chip microcontroller or PLC module.
In the present embodiment, the infrasonic wave generator 2 includes chip NE555, and the infrasound receiver 3 is CASI-
FPS-2011 infrasound receiver.
In the present embodiment, the load transducer 8 is CSF-GYA load transducer, and institute's displacement sensors 9 are YH-
360DC displacement sensor.
In the present embodiment, the three-phase voltage sensor 4 is GST-DJ-S60 three-phase voltage sensor, the three-phase current
Sensor 5 is GST-DJ-S63 three-phase current sensor；The ascending current sensor 6 and centrifugal current sensor 7 are
KCE-VJ03 current sensor.
In the present embodiment, the servomechanism 14 is MCAC706 servomechanism, can degree of regulation to motor 18 it is high, and
Response in time, is adapted to the quick adjusting of pumping unit.
In the present embodiment, the proximity Hall switch 30 is YD-D-C15L proximity Hall switch.
In the present embodiment, it should be noted that the power of hydrodynamic face low value, motor can be preset by touch screen 24
Factor threshold, balance of well pumping unit degree threshold value, jig frequency setting value, displacement setting value and load setting value；And pass through setting touch screen
24 can power factor, the jig frequency of pumping unit, displacement and load to well fluid level, motor synchronize display, convenient for looking into
It sees.
The utility model is when it is implemented, in the pumping unit course of work, hydrodynamic face big in oil mining oil reserve early period
Height, oil well liquid-supplying foot, microcontroller 1 control second contactor 15 and are closed, and 380V power supply 27 passes through 10 He of the first breaker
Third breaker 12 is the power supply of motor 18, and microcontroller 1 controls the normally opened contact closure of second contactor 15, motor 18
Work runs the fixed rotating speed under fixed frequency of motor 18 in power frequency state；Oil pumping machine oil pumping is rotated in motor 18
In the process, microcontroller 1 controls infrasonic wave generator 2 and generates at infrasound to the annular space of oil well casing and oil well oil conduit, infrasonic sound
Wave receiver 3 detects reflected infrasound, and the infrasound signal that will test is sent in microcontroller 1,
Microcontroller 1 handles infrasound signal, obtains well fluid level；Microcontroller 1 is by obtained well fluid level and in advance
The hydrodynamic face low value first set is compared, when the well fluid level that microcontroller 1 obtains is less than hydrodynamic face low value, microcontroller
Device 1 sends frequency conversion instruction to servomechanism 14 by serial communication modular 14, and servomechanism 14 obtains 380V power supply 27 by the
The power supply of one breaker 10 and the second breaker 12, while microcontroller 1 controls the normally opened contact closure of first contactor 16, electricity
The revolving speed adaptation oil well that motivation 18 enters variable mode and adjusts motor 18 is in hydrodynamic face low value situation, reduces motor 18
The loss of electric energy, during motor 18 works, when motor 18 breaks down or extremely, causes the electric current of motor 18
When abnormal, fuse 17 cuts off the performance loop of motor 18, reduces the extension of failure；
During motor of oil extractor 18 works, three-phase voltage sensor 4 carries out the three-phase voltage of motor 18
Detection, and the three-phase voltage that will test is sent to microcontroller 1, three-phase current of the three-phase current sensor 5 to motor 18
The three-phase current for being detected, and being will test is sent to microcontroller 1, and microcontroller 1 is to the three-phase voltage received and three
Phase current is handled, and obtains the power factor of motor, microcontroller 1 by the power factor of obtained motor with set in advance
The power factor threshold of fixed motor is compared, when the power factor for the motor that microcontroller obtains is less than motor
When power factor threshold, microcontroller 1 controls third contactor 20 and is closed, and compensation capacitor 21 is accessed 380V power supply
In 27, to improve the power factor of motor 18, meet the power factor threshold of motor；6 pairs of ascending current sensor oil pumping
The ascending current of electric motor 18 is detected and the ascending current that will test is sent to microcontroller 1, centrifugal current sensing
The centrifugal current that device 7 is detected and be will test to the centrifugal current of motor of oil extractor 18 is sent to microcontroller 1, micro-control
Device 1 processed obtains the degree of balance of pumping unit according to ascending current and centrifugal current, and microcontroller 1 is by the degree of balance of obtained pumping unit
Be compared with preset balance of well pumping unit degree threshold value, when the degree of balance for the pumping unit that microcontroller 1 obtains be unsatisfactory for it is pre-
When the balance of well pumping unit degree threshold value first set, the control balance weight adjusting indicator light 23 of microcontroller 1 is bright, and microcontroller 1 passes through flat
The motor driver 28 that weighs controls balance motor 29 and rotates, and the rotation band dynamic balance weight 19 of balance motor 29 is mobile, band dynamic balance weight 19
So that pumping unit is reached balance close to or far from support shaft, adjust balance of well pumping unit state in real time, until the pumping that microcontroller 1 obtains
The degree of balance of oil machine meets preset balance of well pumping unit degree threshold value.
Proximity Hall switch 30 detects the jig frequency of pumping unit, and the jig frequency that will test pumping unit is sent to micro-control
The jig frequency of the pumping unit received is compared by device 1 processed, microcontroller 1 with preset jig frequency setting value, works as microcontroller
When the jig frequency for the pumping unit that device 1 obtains does not meet jig frequency setting value, the control jig frequency adjusting indicator light 22 of microcontroller 1 is bright, so that
The jig frequency that staff adjusts pumping unit meets jig frequency setting value, improves the system effectiveness of pumping unit；9 pairs of displacement sensor oil pumping
Displacement that is that the displacement signal of machine horse head suspension point is detected and will test is sent to microcontroller 1,8 pairs of load transducer pumpings
Load that is that the load signal of oil machine horse head suspension point is detected and will test is sent to microcontroller 1, and microcontroller 1 will connect
The displacement received and load are compared with preset displacement setting value and load setting value respectively, when load transducer 4
The load detected does not meet preset load setting value or when the displacement that displacement sensor 9 detects is not met in advance
When the displacement setting value of setting, microcontroller 1 controls touch screen 24 and shows that pumping unit does not work normally, illustrates pumping unit
Failure, module 25 is sent to fault-signal to mobile phone 26 to microcontroller 1 by wireless communication, is convenient for staff's on-call maintenance,
Reduce failure propagation.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (8)
1. a kind of oil pump energy-saving Servocontrol device, it is characterised in that: pump including monitoring device and driving pumping unit
Motor (18), the monitoring device includes microcontroller (1), the touch screen (24) and and hand that connect with microcontroller (1)
The wireless communication module (25) of machine (26) wireless data communication, and to the Motor Control mould that motor (18) is controlled
Block, the motor control module include industrial frequency control module and servo frequency control module, the industrial frequency control module and institute
The input terminal for stating servo frequency control module connects with 380V power supply (27), the industrial frequency control module and the servo
Frequency control module is controlled by microcontroller (1), and the output of the microcontroller (1) is terminated with infrasonic wave generator
(2), the balance motor that jig frequency adjusts indicator light (22), balance weight adjusts indicator light (23) and is used for adjustment block (19) position
The input of module, and the compensating electric capacity module for adjusting motor (18) power factor, the microcontroller (1) is terminated with
Infrasound receiver (3), ascending current sensor (6), centrifugal current sensor (7), load transducer (8) and displacement sensor
(9) it and proximity Hall switch (30), the three-phase voltage sensor (4) for detecting motor (18) three-phase voltage and is used for
Detect the three-phase current sensor (5) of motor (18) three-phase current.
2. a kind of oil pump energy-saving Servocontrol device described in accordance with the claim 1, it is characterised in that: the balance motor mould
Block includes balance motor driver (28) and the balance motor (29) that connects with balance motor driver (28) output end, institute
It states balance motor (29) and balance weight (19) to be sequentially connected, the input terminal and microcontroller of the balance motor driver (28)
(1) output end connects.
3. a kind of oil pump energy-saving Servocontrol device according to claim 1 or 2, it is characterised in that: the 380V is supplied
The output of power supply (27) is terminated with the first breaker (10), the servo frequency control module include the second breaker (11),
Servomechanism (14) and the first contactor (16) to connect with servomechanism (14) output end, the industrial frequency control module include that third is disconnected
Road device (12) and the second contactor (15) to connect with third breaker (12) output end, the first contactor (16) and second
It is provided with fuse (17) between the output end and motor (18) of contactor (15), the first contactor (16) and second connects
The input terminal of tentaculum (15) connects with the output end of microcontroller (1), the output end and third of first breaker (10)
The input terminal of breaker (12) and the second breaker (11) connects, the servomechanism (14) by serial communication modular (13) with it is micro-
Controller (1) carries out data communication.
4. a kind of oil pump energy-saving Servocontrol device described in accordance with the claim 3, it is characterised in that: the compensating electric capacity mould
Block includes compensation capacitor (21) and the third contactor (20) that is serially connected in compensation capacitor (21) circuit, the third contact
The input terminal of device (20) connects with microcontroller (1) output end.
5. a kind of oil pump energy-saving Servocontrol device according to claim 1 or 2, it is characterised in that: the microcontroller
Device (1) is single-chip microcontroller or PLC module.
6. a kind of oil pump energy-saving Servocontrol device according to claim 1 or 2, it is characterised in that: the infrasound
Generator (2) includes chip NE555, and the infrasound receiver (3) is CASI-FPS-2011 infrasound receiver.
7. a kind of oil pump energy-saving Servocontrol device according to claim 1 or 2, it is characterised in that: the load passes
Sensor (8) is CSF-GYA load transducer, and institute's displacement sensors (9) are YH-360DC displacement sensor.
8. a kind of oil pump energy-saving Servocontrol device according to claim 1 or 2, it is characterised in that: the three-phase electricity
Pressure sensor (4) is GST-DJ-S60 three-phase voltage sensor, and the three-phase current sensor (5) is GST-DJ-S63 three-phase electricity
Flow sensor；The ascending current sensor (6) and centrifugal current sensor (7) are KCE-VJ03 current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821043459.XU CN208396695U (en) | 2018-07-03 | 2018-07-03 | A kind of oil pump energy-saving Servocontrol device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821043459.XU CN208396695U (en) | 2018-07-03 | 2018-07-03 | A kind of oil pump energy-saving Servocontrol device |
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| CN208396695U true CN208396695U (en) | 2019-01-18 |
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ID=65130728
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| CN201821043459.XU Active CN208396695U (en) | 2018-07-03 | 2018-07-03 | A kind of oil pump energy-saving Servocontrol device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295875A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of novel balanced type pumping unit |
| CN110295874A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of pumping unit and method using servo-control system |
-
2018
- 2018-07-03 CN CN201821043459.XU patent/CN208396695U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295875A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of novel balanced type pumping unit |
| CN110295874A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of pumping unit and method using servo-control system |
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