CN1127847A - Control device for hydraulic pump - Google Patents
Control device for hydraulic pump Download PDFInfo
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- CN1127847A CN1127847A CN 95100375 CN95100375A CN1127847A CN 1127847 A CN1127847 A CN 1127847A CN 95100375 CN95100375 CN 95100375 CN 95100375 A CN95100375 A CN 95100375A CN 1127847 A CN1127847 A CN 1127847A
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- hydraulic pump
- oil hydraulic
- motor
- input end
- output terminal
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Abstract
The control system for hydraulic pump is composed of frequency variator, motor and hydraulic pump. The output of frequency variator is electrically connected to input of motor whose output shaft is mechanically connected to input axle of hydraulic pump. Said hydraulic control system serves to avoid high-speed continuous rotation of motor and hydraulic pump, reduce system noise and part abrasion, and increase service life and reliability.
Description
The present invention is a kind of device that is used for hydraulic system, belongs to the improvement technology of the control gear of oil hydraulic pump.
Existing oil hydraulic pump control gear form by motor and oil hydraulic pump, the output flow of oil hydraulic pump is the function of pump delivery, it is used for high-precision hydraulic control system, thereby can change the output parameter that pump delivery is realized control system by the stroking mechanism of hydraulic servo valve regulation pump, the shortcoming of its existence is exactly that system requires height to the fluid antipollution, motor and pump need the continuous high speed running, System noise is big, parts are easy to wear, the efficient of system is not high, less reliable, and the accuracy of manufacturing of the used hydraulic element of system require high, cost is high.
The objective of the invention is to overcome above-mentioned shortcoming and a kind of output flow of oil hydraulic pump is provided is the control gear of oil hydraulic pump of function of the rotating speed of pump, this device is used for hydraulic control system, can avoid the high-speed and continuous running of motor and oil hydraulic pump, can reduce the noise and the machine members of system effectively, can improve the working life and the reliability of system effectively, can replace high-precision hydraulic control system with common hydraulic system effectively.
Structured flowchart of the present invention includes frequency variator (1), motor (2), oil hydraulic pump (3) as shown in drawings, and the output terminal of frequency variator (1) is connected with the electrical input of motor (2), and the output shaft of motor (2) is connected with the input end of oil hydraulic pump (3).
The present invention is owing to adopt the structure of ac variable frequency speed regulation control rotating speed of motor with the output flow that reaches the regulator solution press pump, the output flow that makes oil hydraulic pump is the function of the rotating speed of pump, the present invention is used for hydraulic control system, can avoid the high-speed and continuous running of motor and oil hydraulic pump, can reduce the noise and the machine members of system effectively, can improve the working life and the reliability of system effectively, can replace high-precision hydraulic control system with common hydraulic system effectively, accuracy of manufacturing to hydraulic element used in the system is less demanding, both reduced cost, can reach high control precision again, also the working efficiency of system can be improved greatly, and the dual energy-conservation of ac variable frequency speed regulation and direct volumetric speed control will be obtained.
Describe concrete structure of the present invention and working condition in detail below in conjunction with embodiment:
Fig. 1 is a structured flowchart of the present invention.
Fig. 2 is used for the hydraulic control system figure of injection moulding machine for the present invention.
Frequency variator (1), motor (2), oil hydraulic pump (8) have been the present invention includes, the output terminal of frequency variator (1) is connected with the electrical input of motor (2), the output shaft of motor (2) is connected with the input end of oil hydraulic pump (3), and motor (2) is an AC motor, and oil hydraulic pump (3) is a metering pump.
For improving the control accuracy of oil hydraulic pump (3), the output terminal of oil hydraulic pump (3) or input end are connected with feedback means (4), and the input end of frequency variator (1) is connected with pi regulator (5), and the output terminal of feedback means (4) is connected with the input end of pi regulator (5).
The output terminal of above-mentioned oil hydraulic pump (3) can be connected with the input end of executive components such as motor or cylinder (6), for improving the control accuracy of executive component (6), the output terminal of executive component (6) is connected with feedback means (7), the input end of frequency variator (1) is connected with pi regulator (5), the output terminal of feedback means (7) is connected with the input end of pi regulator (5), as shown in Figure 1.
Fig. 2 is used for the hydraulic control system figure of injection moulding machine for the present invention.Frequency variator (1) adopts SAMCO-M High Performance Digital frequency variator, and motor (2) adopts Y
160M-6 three-phase AC asynchronous motor, oil hydraulic pump (3) adopts A
2F
23Simply connected blade type metering pump, executive component (6) is motor BM
2-250, feedback means (7) adopts pressure sensor, pi regulator (5) is a proportional and integral controller.This hydraulic control system is come injection pressure in the control system by the output frequency that changes frequency variator (1), and dwell pressure and low pressure are controlled by three groups of solenoid valves and relief valve to substitute traditional hydraulic control system; Come the various speed that need of regulating system by the output frequency that changes frequency variator (1), regulate by variable displacement pump and unipump to substitute traditional hydraulic control system; And can realize stepless speed regulation and make speed adjustable range bigger by frequency control of motor speed; Simultaneously, owing to be provided with pressure transducer (7) and pi regulator (5) in this hydraulic control system, the voltage signal and the input voltage that utilize out pressure transducer (7) to feed back compare, by pi regulator (5), make output reach stationary value, even hydraulic control system reaches work under the pressure constant state, this hydraulic control system is owing to adopt the output flow of variable-frequency control technique control oil hydraulic pump and be provided with feedback means, whole system is simplified more, control accuracy can further improve, realize realizing the function of hydraulic servo control system effectively, thereby replace high-precision hydraulic control system with common hydraulic system effectively with common hydraulic system.
The variation of the output frequency of above-mentioned frequency variator (1) can realize that pi regulator (5) can be controlled by the PLC programmable controller by the output voltage that changes connected pi regulator (5), and its control accuracy and automaticity are further improved.
Claims (6)
1, a kind of control gear of oil hydraulic pump is characterized in that including frequency variator (1), motor (2), oil hydraulic pump (3), and the output terminal of frequency variator (1) is connected with the electrical input of motor (2), and the output shaft of motor (2) is connected with the input end of oil hydraulic pump (3).
2, the control gear of oil hydraulic pump according to claim 1 is characterized in that above-mentioned motor (2) is AC motor, and oil hydraulic pump (3) is a metering pump.
3, the control gear of oil hydraulic pump according to claim 1 and 2, the output terminal or the input end that it is characterized in that above-mentioned oil hydraulic pump (3) are connected with feedback means (4), the input end of frequency variator (1) is connected with pi regulator (5), and the output terminal of feedback means (4) is connected with the input end of pi regulator (5).
4, the control gear of oil hydraulic pump according to claim 1 and 2 is characterized in that the output terminal of above-mentioned oil hydraulic pump (3) is connected with the input end of executive component (6).
5, the control gear of oil hydraulic pump according to claim 4, the output terminal that it is characterized in that above-mentioned executive component (6) is connected with feedback means (7), the input end of frequency variator (1) is connected with pi regulator (5), and the output terminal of feedback means (7) is connected with the input end of pi regulator (5).
6, the control gear of oil hydraulic pump according to claim 3, the output terminal that it is characterized in that above-mentioned oil hydraulic pump (3) is connected with the input end of executive component (6), the output terminal of executive component (6) is connected with feedback means (7), and the output terminal of feedback means (7) is connected with the input end of pi regulator (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95100375 CN1127847A (en) | 1995-01-28 | 1995-01-28 | Control device for hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95100375 CN1127847A (en) | 1995-01-28 | 1995-01-28 | Control device for hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1127847A true CN1127847A (en) | 1996-07-31 |
Family
ID=5073413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95100375 Pending CN1127847A (en) | 1995-01-28 | 1995-01-28 | Control device for hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127847A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155405A (en) * | 2011-05-06 | 2011-08-17 | 沈阳工业大学 | Intelligent revolving speed control system and control method for submersible oil screw pump |
| CN101672271B (en) * | 2009-10-19 | 2012-05-23 | 北京乐普四方方圆科技股份有限公司(中国) | Air compressor energy-saving controller with constant pressure and dormancy and control method |
| CN101765392B (en) * | 2007-08-20 | 2012-10-17 | 雀巢产品技术援助有限公司 | Beverage production module and method for operating a beverage production module |
| CN106133327A (en) * | 2014-03-26 | 2016-11-16 | 威乐欧洲股份公司 | For the method determining the hydraulic point of pump group |
| CN111757986A (en) * | 2018-02-19 | 2020-10-09 | 格兰富控股联合股份公司 | Pressure sensor with integrated pump control |
| CN114905792A (en) * | 2022-04-08 | 2022-08-16 | 山东鲁南精工机械有限公司 | A servo press control system |
-
1995
- 1995-01-28 CN CN 95100375 patent/CN1127847A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765392B (en) * | 2007-08-20 | 2012-10-17 | 雀巢产品技术援助有限公司 | Beverage production module and method for operating a beverage production module |
| CN101672271B (en) * | 2009-10-19 | 2012-05-23 | 北京乐普四方方圆科技股份有限公司(中国) | Air compressor energy-saving controller with constant pressure and dormancy and control method |
| CN102155405A (en) * | 2011-05-06 | 2011-08-17 | 沈阳工业大学 | Intelligent revolving speed control system and control method for submersible oil screw pump |
| CN106133327A (en) * | 2014-03-26 | 2016-11-16 | 威乐欧洲股份公司 | For the method determining the hydraulic point of pump group |
| CN106133327B (en) * | 2014-03-26 | 2018-07-06 | 威乐欧洲股份公司 | For determining the method for the hydraulic of pump group point |
| US10184476B2 (en) | 2014-03-26 | 2019-01-22 | Wilo Se | Method of determining hydraulic operating point of a pump |
| CN111757986A (en) * | 2018-02-19 | 2020-10-09 | 格兰富控股联合股份公司 | Pressure sensor with integrated pump control |
| CN111757986B (en) * | 2018-02-19 | 2023-08-25 | 格兰富控股联合股份公司 | Pressure sensor with integrated pump control |
| CN114905792A (en) * | 2022-04-08 | 2022-08-16 | 山东鲁南精工机械有限公司 | A servo press control system |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |