CN202123685U - Output oil circuit of multi-cylinder hydraulic system of automobile longitudinal beam hydraulic machine - Google Patents
Output oil circuit of multi-cylinder hydraulic system of automobile longitudinal beam hydraulic machine Download PDFInfo
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- CN202123685U CN202123685U CN 201120127607 CN201120127607U CN202123685U CN 202123685 U CN202123685 U CN 202123685U CN 201120127607 CN201120127607 CN 201120127607 CN 201120127607 U CN201120127607 U CN 201120127607U CN 202123685 U CN202123685 U CN 202123685U
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- oil circuit
- oil
- output oil
- automobile longitudinal
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Abstract
The utility model relates to an output oil circuit of a multi-cylinder hydraulic system of an automobile longitudinal beam hydraulic machine, which comprises two main output oil circuits. Each main output oil circuit is provided with a fixed displacement pump utilized as a power element. The output oil circuit is characterized in that each main output oil circuit is further provided with an auxiliary compensation oil circuit in a parallel connection manner, each auxiliary compensation oil circuit is provided with a proportioning pump utilized as a power element, and an oil outlet of each proportioning pump is successively connected with a reversing valve and a servo valve. All main cylinders of the automobile longitudinal beam hydraulic machine are divided into two groups, the two main output oil circuits respectively supply oil for the two groups of main cylinders via reversing system plugging valve blocks, real-time displacement signals of the two groups of main cylinders are detected by a displacement sensor, after computing the real-time displacement signals, a programmable logic controller controls the auxiliary compensating oil circuits of the two main output oil circuits to replenish oil or drain oil according to the real-time displacement signals, synchronization is realized, when in compensation, the proportioning pumps realize rough synchronization while the servo valves realize accurate synchronization, and synchronization precision is high.
Description
Technical field
The utility model relates to a kind of automobile longitudinal girder hydraulic press multicylinder hydraulic system, the output circuit of particularly a kind of automobile longitudinal girder hydraulic press multicylinder hydraulic system.
Background technology
The automobile longitudinal girder hydraulic press is used for the compacting of automobile longitudinal girder; Because its table top length is long and compacting is bigger; Usually adopt multi-cylinder to drive; The multi-cylinder structure is not high for the requirement of each side such as firm and a large amount of processing requests, material requirements, required precision, requirement of strength, and its cost greatly reduces.But its synchronous requirement to whole system has proposed higher requirement.
Mostly present multicylinder hydraulic system synchronization control is the proportioning pump hydraulic synchronous control system, and its two proportioning pumps that adopt are joined some constant displacement pumps or all adopted the proportioning pump system, the real-time displacement of displacement sensor both sides or each cylinder; Fast following time still is by machine control itself synchronously; For the system of two proportioning pumps, thus slowly following time reach synchronously by the flow of synchronous error control both sides proportioning pump, then adopt a cylinder as benchmark for many proportioning pumps system; Thereby the synchronous error of all the other each cylinders and reference in-cylinder is used for controlling the flow of each proportioning pump reaches synchronous; The backhaul control principle is the same with control principle slowly, and employing should the control system be enhanced than preceding a kind of control system synchronization precision, but since the response time of proportioning pump longer; The flow accuracy of regulating is not high; The synchronization accuracy of this control system still is not too high, and has the changes in flow rate dead band, is difficult to the occasion that is applied to have relatively high expectations.
Summary of the invention
The technical problem that the utility model will solve provides the output circuit of the high automobile longitudinal girder hydraulic press multicylinder hydraulic system of a kind of synchronization accuracy.
For solving the problems of the technologies described above; The technical scheme of the utility model is: the output circuit of a kind of automobile longitudinal girder hydraulic press multicylinder hydraulic system; Comprise two-way master output circuit, constant displacement pump is installed as dynamical element on each main output circuit, its innovative point is: go back parallel connection on the master's output circuit of said every road and be provided with an auxiliary compensation oil circuit; Proportion of installation pump is as dynamical element on the said auxiliary compensation oil circuit, and the oil-out of proportioning pump is connected with reversal valve and servo valve in turn.
The advantage of the utility model is: all master cylinders of automobile longitudinal girder hydraulic press are divided into two groups; Carry out fuel feeding by one tunnel master's output circuit through exchange system inserted valve piece respectively; The instant displacement signal of two groups of master cylinders that Programmable Logic Controller records according to displacement transducer carries out repairing through the auxiliary compensation oil circuit that calculates back control two-way master output circuit or drains the oil, and realizes carrying out coarse synchronization by proportioning pump during compensation synchronously; Servo valve is realized precise synchronization, and synchronization accuracy is high.
Description of drawings
Accompanying drawing is the output circuit schematic diagram of the utility model automobile longitudinal girder hydraulic press multicylinder hydraulic system.
The specific embodiment
Accompanying drawing shows the output circuit schematic diagram of the utility model automobile longitudinal girder hydraulic press multicylinder hydraulic system; Comprise two-way master output circuit; All master cylinders of automobile longitudinal girder hydraulic press are divided into two groups; This two-way master output circuit respectively to wherein one group carry out fuel feeding, every road master's output circuit is composed in parallel by the output circuit a that is separately installed with constant displacement pump 1, on the master's output circuit of every road also parallel connection be provided with an auxiliary compensation oil circuit b; Should go up proportion of installation pump 2 as dynamical element by auxiliary compensation oil circuit b, the oil-out of proportioning pump 2 is connected with reversal valve 3 and servo valve 4 in turn.
When specifically synchronous; Programmable Logic Controller records the instant displacement on walking beam both sides based on the displacement transducer 5 that is arranged on automobile longitudinal girder hydraulic press walking beam side; Whether the extension elongation that reflects two groups of master cylinders based on its difference is consistent, and with this error signal input Programmable Logic Controller, Controlled by Programmable Controller proportioning pump 2 carries out the control correction of flow; Guarantee the synchronous operation of walking beam, thereby realize synchronously thick; Because proportioning pump exists dead band and flow non-linear, thus thick synchronous in Controlled by Programmable Controller cooperates with reversal valve 3 based on displacement error control servo valve 4 two groups of master cylinders is carried out the ratio repairing or drain the oil, make two groups of master cylinders implementation precise synchronization move; Servo valve 4 is arranged in auxiliary compensation oil circuit b; The flow that passes through is less, can select the valve of little latus rectum, and control accuracy is high; Response is fast, and cost is low.
Claims (1)
1. the output circuit of an automobile longitudinal girder hydraulic press multicylinder hydraulic system; Comprise two-way master output circuit; Constant displacement pump is installed as dynamical element on each main output circuit; It is characterized in that: go back parallel connection on the master's output circuit of said every road and be provided with an auxiliary compensation oil circuit, proportion of installation pump is as dynamical element on the said auxiliary compensation oil circuit, and the oil-out of proportioning pump is connected with reversal valve and servo valve in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120127607 CN202123685U (en) | 2011-04-27 | 2011-04-27 | Output oil circuit of multi-cylinder hydraulic system of automobile longitudinal beam hydraulic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120127607 CN202123685U (en) | 2011-04-27 | 2011-04-27 | Output oil circuit of multi-cylinder hydraulic system of automobile longitudinal beam hydraulic machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202123685U true CN202123685U (en) | 2012-01-25 |
Family
ID=45486756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120127607 Expired - Fee Related CN202123685U (en) | 2011-04-27 | 2011-04-27 | Output oil circuit of multi-cylinder hydraulic system of automobile longitudinal beam hydraulic machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202123685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130297A (en) * | 2018-09-28 | 2019-01-04 | 南通市腾达锻压机床厂 | The servo-control system of automobile longitudinal girder multi-cylinder multicolumn hydraulic press |
| CN111120438A (en) * | 2019-12-31 | 2020-05-08 | 南京埃斯顿自动化股份有限公司 | Synchronous control method for unbalance load resistance of servo pump |
-
2011
- 2011-04-27 CN CN 201120127607 patent/CN202123685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130297A (en) * | 2018-09-28 | 2019-01-04 | 南通市腾达锻压机床厂 | The servo-control system of automobile longitudinal girder multi-cylinder multicolumn hydraulic press |
| CN111120438A (en) * | 2019-12-31 | 2020-05-08 | 南京埃斯顿自动化股份有限公司 | Synchronous control method for unbalance load resistance of servo pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20200427 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |