CN1034981A - Leak electronic compensating volume-type hydraulic pump constant flow regulation system and method - Google Patents
Leak electronic compensating volume-type hydraulic pump constant flow regulation system and method Download PDFInfo
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- CN1034981A CN1034981A CN 88100117 CN88100117A CN1034981A CN 1034981 A CN1034981 A CN 1034981A CN 88100117 CN88100117 CN 88100117 CN 88100117 A CN88100117 A CN 88100117A CN 1034981 A CN1034981 A CN 1034981A
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Abstract
一种泄漏电补偿容积式液压泵恒流调节系统和 方法，属于液压泵恒流量调节技术。本发明不直接检 测泵的输出流量，而通过检测泵的变量油缸位移、外 泄漏流量、温度、压力等参数，经信号处理辩识出泵的 泄漏流量，并对给定信号进行实时电补偿，达到泵的 输出流量恒定。本发明可对各种容积式变量泵实现 泵的恒流量调节，并完全避免了传统的恒流量调节泵 因设置流量检测元件所造成的能量损失。
The invention discloses a leakage electric compensation displacement type hydraulic pump constant flow regulation system and method, belonging to hydraulic pump constant flow regulation technology. The present invention does not directly detect the output flow of the pump, but detects the variable oil cylinder displacement, external leakage flow, temperature, pressure and other parameters of the pump, identifies the leakage flow of the pump through signal processing, and performs real-time electrical compensation for the given signal, To achieve a constant output flow of the pump. The invention can realize the constant flow adjustment of various volumetric variable pumps, and completely avoids the energy loss caused by the arrangement of flow detection elements in the traditional constant flow adjustment pumps.
Description
The invention belongs to Hydraulic Pump Constant Flow amount regulation technology.
Flow is a basic parameter in the fluid dynamic control.It is that the flow that makes pump export to system is not subjected to the influence of other disturbing factors such as load and remains setting value that the constant current amount of volume-type hydraulic pump is regulated.The constant current amount is regulated pump and is called power again and adapts to pump, because of its output flow and pressure all adapt with load force and speed, can make system reach higher efficient and is widely used.Up to now, the constant current amount is regulated pump one flow sensor is set on working connection usually both at home and abroad, and realize by Flow-rate adjustment.Generally have only two kinds of forms, a kind of is that a flow controller is set in the working connection of oil hydraulic pump, is pressure reduction with the output flow signal conversion, and realizes flow pressure reduction feedback, and pump delivery is compensated adjusting, reaches the output of constant current amount.Another kind is the output flow that a flow transducer testing pump is set in the working connection of pump, and the flux signal that flow transducer detects gained is converted into displacement, power or voltage signal, again relatively, realize the flow feedback regulation and realize that the constant current amount of pump regulates itself and given signal.But, though regulating, pressure differential detection feedback-type constant current amount can obtain a less regulating error (＜10%) and comparatively satisfied regulation range, but the pressure loss at flow controller place is at least 1.0～1.4MPa as feedback signal, although and the constant current amount that adopts flow transducer is regulated flow transducer under corresponding conditions, its operating pressure differential is compared with above-mentioned flow controller as the flow-pressure differential device, only need 1/3～1/2, but still need 0.5～0.7MPa.No matter this shows, be the regulating method of which kind of traditional constant flow pump, because of directly detect load flow on working connection, brought additional full flow throttling power loss.For the high-pressure service pump of 31.5MPa, this loss accounts for 2～4% of pump power output, and for the medium pressure pump of 16.0MPa, accounts for 3～9%, and this is undoubtedly a kind of energy loss.
In order to overcome the problem of above-mentioned existence, propose a kind of employing and leak electronic compensating volume-type hydraulic pump constant flow regulation system and method, special proposition the present invention.
The present invention is when being to avoid fully the Hydraulic Pump Constant Flow amount to regulate, because of the energy loss that flow detecting element causes is set on working connection.Consider Hydraulic Pump Constant Flow amount regulating error be since the leakage flow of oil hydraulic pump cause (leakage flow is internal leakage and external leakage flow sum, below identical), the present invention is the output flow of direct testing pump not, and parameter such as the external leakage flow of the working oil temperature by testing pump, induced pressure, pump and the displacement of oil hydraulic pump variable oil cylinder, pick out the actual output flow error of pump indirectly through signal processing, be the leakage flow of pump, according to the leakage flow of pump the given signal u of flow to pump
iCarry out real-time electronic compensating correction, make the output flow of pump constant to reach.The present invention can realize the constant current amount adjusting of pump to various positive displacement variable displacement pumps, and has avoided traditional constant current amount to regulate pump because of the energy loss that flow detecting element causes is set fully.
Accompanying drawing: leak electronic compensating volume-type hydraulic pump constant flow regulation system diagram
In conjunction with the accompanying drawings the present invention is further described: it comprises that an end is connected with subtractor (8), signal processor (6) respectively the present invention, the displacement transducer (1) that the other end is connected with the variable oil cylinder (12) of positive displacement hydraulic variable displacement pump (9), the sensor (2) that an end is connected with signal processor (6), the other end is connected with positive displacement hydraulic variable displacement pump (9); One end is connected with adder (7), the signal processor (6) that the other end is connected with displacement transducer (1), sensor (2) respectively, the given signal u of flow of the pump that an end is connected with adder (7)
iSensor (2), it comprises external leakage flow transducer (3) or temperature transducer (4) or pressure transducer (5) or the combination in any between them.Positive displacement hydraulic variable displacement pump (9) is made up of amplifier (10), variable controller (11), variable oil cylinder (12), hydraulic pump body (13).
Displacement transducer (1) is installed on the variable oil cylinder (12) of positive displacement hydraulic variable displacement pump (9), is used for the displacement of the variable oil cylinder (12) of detection volume formula hydraulic variable displacement pump (9), and it has two delivery outlets, and one meets subtractor (8) and given signal u
iConstitute negative feedback closed loop control, realize permanent discharge capacity adjusting, another connects signal processor (6) and output connects adder (7); External leakage flow transducer (3) is installed in the external leakage hydraulic fluid port of the positive pump housing of liquid (13) of positive displacement hydraulic variable displacement pump (9), is used for the external leakage flow of detection volume formula hydraulic variable displacement pump (9); Temperature transducer (4) has three, is installed in inlet, outlet and the external leakage hydraulic fluid port of hydraulic pump body (13) respectively, is used to detect the temperature of inlet, outlet and the external leakage hydraulic fluid port of hydraulic pump body (13); Pressure transducer (5) is installed in the outlet of hydraulic pump body (13), detects the induced pressure of (13); Signal processor (6) can be Analogic Electronic Circuits or microcomputer or single board computer or microprocessor, it is according to displacement transducer (1) and external leakage flow transducer (3) or temperature transducer (4) or pressure transducer (5) or the detected signal of the combination in any between them, and carry out signal processing according to the compensation mathematical model of this pump, export a compensating signal △ u relevant with constant current amount error, and by the flow given signal u of adder (7) superposition at pump
iOn carry out the real-Time Compensation correction, realize that the constant current amount of pump is regulated.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88100117 CN1015021B (en) | 1988-01-16 | 1988-01-16 | Leakage Electric Compensation Volumetric Hydraulic Pump Constant Current Regulation System and Method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88100117 CN1015021B (en) | 1988-01-16 | 1988-01-16 | Leakage Electric Compensation Volumetric Hydraulic Pump Constant Current Regulation System and Method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034981A true CN1034981A (en) | 1989-08-23 |
| CN1015021B CN1015021B (en) | 1991-12-04 |
Family
ID=4831185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88100117 Expired CN1015021B (en) | 1988-01-16 | 1988-01-16 | Leakage Electric Compensation Volumetric Hydraulic Pump Constant Current Regulation System and Method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015021B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922487A (en) * | 2010-06-18 | 2010-12-22 | 无锡市海航电液伺服系统有限公司 | Oil leak monitoring system of hydraulic servo pump station |
| CN105386953A (en) * | 2015-12-25 | 2016-03-09 | 上海交通大学 | Digital flow-distribution constant-flow radial plunger pump |
| CN105804964A (en) * | 2016-03-15 | 2016-07-27 | 北京星达科技发展有限公司 | High-pressure constant flow pump and flow closed-loop control method |
| CN107110151A (en) * | 2015-03-10 | 2017-08-29 | 桑德霍夫工程公司 | The induction system of the method for compensating leakage loss and the liquid for conveying ormal weight |
| CN113606206A (en) * | 2021-05-26 | 2021-11-05 | 广州嘉泰液压机电有限公司 | Hydraulic test oil source system |
| CN114270041A (en) * | 2019-12-16 | 2022-04-01 | 日立建机株式会社 | Construction machine |
-
1988
- 1988-01-16 CN CN 88100117 patent/CN1015021B/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922487A (en) * | 2010-06-18 | 2010-12-22 | 无锡市海航电液伺服系统有限公司 | Oil leak monitoring system of hydraulic servo pump station |
| CN107110151A (en) * | 2015-03-10 | 2017-08-29 | 桑德霍夫工程公司 | The induction system of the method for compensating leakage loss and the liquid for conveying ormal weight |
| CN107110151B (en) * | 2015-03-10 | 2020-03-10 | 桑德霍夫工程公司 | Method for compensating for leakage loss and delivery system for delivering specified volume of liquid |
| CN105386953A (en) * | 2015-12-25 | 2016-03-09 | 上海交通大学 | Digital flow-distribution constant-flow radial plunger pump |
| CN105804964A (en) * | 2016-03-15 | 2016-07-27 | 北京星达科技发展有限公司 | High-pressure constant flow pump and flow closed-loop control method |
| CN105804964B (en) * | 2016-03-15 | 2018-05-29 | 北京星达科技发展有限公司 | High pressure constant flow pump and flow closed loop control method |
| CN114270041A (en) * | 2019-12-16 | 2022-04-01 | 日立建机株式会社 | Construction machine |
| CN114270041B (en) * | 2019-12-16 | 2023-07-25 | 日立建机株式会社 | Engineering machinery |
| CN113606206A (en) * | 2021-05-26 | 2021-11-05 | 广州嘉泰液压机电有限公司 | Hydraulic test oil source system |
| CN113606206B (en) * | 2021-05-26 | 2022-04-29 | 广州嘉泰液压机电有限公司 | Hydraulic test oil source system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015021B (en) | 1991-12-04 |
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