CN209943225U - Hydraulic system - Google Patents
Hydraulic system Download PDFInfo
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- CN209943225U CN209943225U CN201822204495.6U CN201822204495U CN209943225U CN 209943225 U CN209943225 U CN 209943225U CN 201822204495 U CN201822204495 U CN 201822204495U CN 209943225 U CN209943225 U CN 209943225U
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Abstract
The utility model relates to a hydraulic system, which comprises at least two hydraulic machines; a main drive unit for providing hydraulic power; the main driving unit is connected with the at least two hydraulic machines; the upper ejection unit, the lower ejection unit and the energy accumulator group are used for assisting the main driving unit; the control unit is connected with the main driving unit, the upper material ejecting unit, the lower material ejecting unit and the energy accumulator group; the main driving unit drives a sliding block of the hydraulic machine to move up and down and eject; the accumulator group drives the sliding block of the hydraulic machine to perform downward ejection. The hydraulic system adopts one set of pressure table to supply different hydraulic machines, thereby saving the area of an installation place, reducing the required control cabinet, improving the energy utilization and avoiding the energy waste.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field especially relates to a hydraulic system.
Background
On a production line, it is common practice to: one hydraulic machine is matched with one hydraulic station or hydraulic pump. In this way, if a set of hydraulic machines, a bulky set of hydraulic stations or pumps is required.
However, such a method puts higher demands on equipment installation sites and equipment management and control, and requires large-area installation sites and numerous control cabinets; and the energy waste is huge.
SUMMERY OF THE UTILITY MODEL
Based on this, there is a need for a new hydraulic system.
A hydraulic system, comprising:
at least two hydraulic machines;
a main drive unit for providing hydraulic power; the main driving unit is connected with the at least two hydraulic machines;
the upper material-pushing unit is arranged on the upper material-pushing unit,
a lower material-ejecting unit for ejecting the material,
an accumulator group for assisting the main drive unit;
the control unit is connected with the main driving unit, the upper material ejecting unit, the lower material ejecting unit and the energy accumulator group;
the main driving unit drives a sliding block of the hydraulic machine to move up and down and eject; the accumulator group drives the sliding block of the hydraulic machine to perform downward ejection.
The hydraulic system adopts one set of pressure table to supply different hydraulic machines, thereby saving the area of an installation place, reducing the required control cabinet, improving the energy utilization and avoiding the energy waste.
Optionally, the main drive unit comprises a number of motors and a number of plunger pumps.
Optionally, the number of the motors is 9, and the number of the plunger pumps is 9.
Optionally, the accumulator bank comprises several bladder accumulators.
Optionally, the number of the bladder accumulators is 8.
Optionally, the control unit comprises a time relay, a displacement sensor, and a PLC.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic system according to an embodiment of the present invention.
Fig. 2 shows the principle of the relationship between the electrical, hydraulic and mechanical actions of the hydraulic system.
Fig. 3 is a schematic diagram of a pilot operated relief valve.
FIG. 4 is a schematic diagram of sequence valve control.
Fig. 5 is a control schematic diagram (in the figure, when off) of the hydraulic pump using a quick stroke.
Fig. 6 is a schematic diagram of a direct acting sequence valve (with internal pilot supply and external drain ports).
Fig. 7 is a schematic diagram of a pilot-operated sequence valve (with internal pilot supply and internal drain ports).
FIG. 8 is a schematic diagram of a pilot operated sequence valve (with external pilot supply and internal drain ports).
Fig. 9 is a schematic diagram of a pilot-operated sequence valve (with internal pilot oil supply and external drain ports).
Fig. 10 is a schematic diagram of a pilot-operated sequence valve (with external pilot oil supply and outlet ports).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-10 in combination, a hydraulic system according to an embodiment of the present invention includes at least two hydraulic machines 110, a main drive unit, an upper material ejection unit, a lower material ejection unit, an accumulator group 150, and a control unit.
Wherein the main function of the main drive unit is to provide hydraulic power. The main drive unit is connected with the at least two hydraulic machines, so that the at least two hydraulic machines act under the action of the main drive unit. The at least two hydraulic machines share a main drive unit. In a preferred embodiment, the main driving unit is provided with hydraulic power by a plurality of motors and a plurality of plunger pumps, and drives a slide block of the hydraulic machine to move up and down and eject. More specifically, 9 motors and 9 plunger pumps.
The main driving unit, the lower material ejecting unit and the upper material ejecting unit respectively correspond to and control the at least two hydraulic machines and the stations thereof. Namely, a set of hydraulic circuit system is used for realizing multi-station control of multiple devices.
Wherein the main function of the accumulator battery is to assist the main drive unit. Specifically, the energy accumulator group assists the main driving unit to perform downward slow-moving pressurizing action on the hydraulic machine, and independently provides energy for the upward material ejecting action of the hydraulic machine after the main driving unit completes the downward slow-moving pressurizing action and the downward material ejecting action.
Optionally, the accumulator bank comprises several bladder accumulators.
Optionally, the number of the bladder accumulators is 8.
According to the process flow, the pressure of the hydraulic system is distributed at different times, and the plurality of motors and the plurality of plunger pumps provide hydraulic power for the energy accumulator group, so that the energy accumulator group keeps rated pressure. In a specific embodiment, 2 motors and 2 plunger pumps provide hydraulic power to the accumulator bank.
The control unit is mainly used for controlling various units and devices thereof in the hydraulic system. The control unit is connected with the main driving unit, the upper material ejecting unit, the lower material ejecting unit and the energy accumulator group.
Optionally, the control unit comprises a time relay, a displacement sensor, and a PLC.
The hydraulic system is matched with oil circuit control elements such as a main oil pump, a cone valve, an electro-hydraulic overflow valve, a proportional servo valve, an electro-hydraulic steering valve, a one-way valve, a liquid charging valve, a three-position four-way electromagnetic valve, an energy accumulator and the like; the hydraulic circuit system is simultaneously matched with electric elements such as an oil pump, an electromagnetic steering valve, a displacement sensor, a time relay, a circuit breaker, a delayer, a temperature sensor and the like, and the PLC is used for programming and controlling the action of the electric elements, so that the hydraulic system is controlled to sequentially realize action circulation according to the action requirement of the production process.
In the hydraulic system, a hydraulic system of the hydraulic machine is controlled by an electromagnetic steering valve, a cone valve, an electro-hydraulic overflow valve, a proportional servo valve, an electro-hydraulic steering valve and the like, so that the hydraulic machine realizes rapid descending and slow pressurization descending actions.
The hydraulic element for controlling the movement of the hydraulic press sliding block by the cone valve integrated block comprises a switch, a safety control, a brake control and the like; the switch controls the forward and reverse stroke movement of the sliding block; the safety control is communicated with the hydraulic system for overload protection and prevents the sliding block from going downwards without control; and the brake control controls all the functions of the sliding block to move downwards.
The hydraulic system consists of an energy conversion device (such as a pump, an oil cylinder and the like), an energy adjusting device (such as a hydraulic valve), an energy transmission device (such as an oil pipe and a pipeline) and the like, and the electric control hydraulic system is used for driving a sliding block to move so as to finish various process actions.
In a hydraulic system, a main oil cylinder consists of a piston cylinder, a cylinder body, a piston, a guide sleeve and a connecting nut; the stroke limiting device of the main oil cylinder comprises a collision block, a magnetic head, a displacement sensor, a limiting switch and the like, wherein the collision block and the magnetic head are arranged on a sliding block and move up and down along with the sliding block. The displacement sensor and the limiting block are arranged on the upright post, and when the stroke needs to be adjusted, the positions of the transmitting points such as upper limiting point, lower limiting point, fast rotation, slow rotation and the like can be set by adjusting the position of the magnetic head, so that the position of each action of the press is controlled. The upper limit switch and the lower limit switch are used for upper limit protection and lower limit protection.
In a hydraulic system, a stroke limiting device of a jacking cylinder of the jacking cylinder comprises a collision block, a magnetic head, a displacement sensor, a limit switch and the like, and a bracket is arranged on a piston cylinder body and moves up and down along with the piston cylinder body.
The oil tank sharing hydraulic system is arranged on a middle platform of a plurality of devices. The valve block, the hydraulic assembly and the oil pump motor set are arranged on the oil tank. The oil tank is provided with an air filter, a liquid level meter, an oil filter and other devices.
The working process principle of the hydraulic system is explained below.
When the hydraulic machine with the highest working load moves downwards, the electromagnet quickly and completely loosens the locking valve, the accumulator group fills oil into the upper cavity of the oil cylinder of the hydraulic machine, the upper sliding block of the hydraulic machine moves downwards quickly, and the hydraulic machine stops when the displacement limit is set; then, the upper sliding block of the hydraulic machine starts to be pressurized at full load and descends, at the moment, the accumulator group stops filling oil to the upper cavity of the hydraulic machine oil cylinder, all the main oil pumps are started, oil is filled to the upper cavity of the hydraulic machine oil cylinder through the electro-hydraulic steering valve, the one-way valve and the liquid filling valve, and if overload pressure exists, a small amount of oil in the upper cavity of the main oil cylinder is filled into the accumulator group through the cone valve and the electro-hydraulic overflow valve.
The upper sliding block of the hydraulic press is slowly pressurized and descends until the set displacement limit is reached; the displacement sensor and the electromagnetic valve stop the upper sliding block of the hydraulic press from descending, the breaker disconnects part of the oil pump and the energy accumulator, the electro-hydraulic steering valve switches the flowing direction of oil, and the oil flows back to the main oil tank; meanwhile, a time relay and an electromagnetic steering valve control oil to be filled into a lower cavity of the hydraulic press oil cylinder, the upper cavity of the hydraulic press oil cylinder generates negative pressure, and an upper sliding block of the hydraulic press starts to move upwards quickly.
When the sliding block moves upwards to a set height and needs to be fed with a material, the displacement sensor and the electromagnetic valve reopen an oil way switch of the energy accumulator, oil is quickly filled into a material feeding rod oil cylinder to drive the material feeding rod to complete the material feeding action, after the material feeding action is completed, the time relay is linked with the electro-hydraulic steering valve, and the oil is driven by the steering valve to quickly reset the material feeding rod; meanwhile, the upper sliding block of the hydraulic press continues to quickly move upwards; when the displacement sensor observes that the upper sliding block of the hydraulic machine is displaced to a set limit, the displacement sensor is linked with the electromagnet to lock, and the upper sliding block is arranged; the cut-off switch and the electromagnetic steering valve act to cut off the oil supply pump of the hydraulic press. Part of the oil pumps are kept in an opening state, and the oil is continuously filled into the accumulator group to maintain the set pressure; under the control of the PLC, the system enters a servo state for the next hydraulic machine.
The action of the oil system of the next hydraulic machine is similar to that of the previous hydraulic machine, and the number of the opened plunger pumps needs to be reduced and the pressure released by the energy accumulator needs to be reduced only if the required load is different from that of the previous hydraulic machine. And will not be described in detail herein.
In the hydraulic system, the hydraulic two-way cartridge valve has the advantages of compact structure, convenience in installation and maintenance, sensitive and reliable action, high transmission rate and good sealing property. In the hydraulic system, after the main equipment finishes the action with the maximum required load, the energy accumulator group can supply oil with other actions in a cross way at other times, the time difference and the pressure difference are fully utilized, and other oil pumps are matched, so that the energy saving is realized.
The hydraulic system adopts one set of pressure table to supply different hydraulic machines, thereby saving the area of an installation place, reducing the required control cabinet, improving the energy utilization and avoiding the energy waste.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A hydraulic system, comprising:
at least two hydraulic machines;
a main drive unit for providing hydraulic power; the main driving unit is connected with the at least two hydraulic machines;
an upper material pushing unit;
a lower ejection unit;
an accumulator group for assisting the main drive unit;
the control unit is connected with the main driving unit, the upper material ejecting unit, the lower material ejecting unit and the energy accumulator group;
the main driving unit drives a sliding block of the hydraulic machine to move up and down and eject; the accumulator group drives the sliding block of the hydraulic machine to perform downward ejection.
2. The hydraulic system of claim 1, wherein the main drive unit includes a plurality of motors and a plurality of plunger pumps.
3. The hydraulic system of claim 2, wherein the number of motors is 9 and the number of plunger pumps is 9.
4. The hydraulic system of claim 1, wherein the accumulator bank comprises a plurality of bladder accumulators.
5. The hydraulic system of claim 4, wherein the number of bladder accumulators is 8.
6. The hydraulic system of claim 1, wherein the control unit comprises a time relay, a displacement sensor, and a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822204495.6U CN209943225U (en) | 2018-12-26 | 2018-12-26 | Hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822204495.6U CN209943225U (en) | 2018-12-26 | 2018-12-26 | Hydraulic system |
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| CN209943225U true CN209943225U (en) | 2020-01-14 |
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| CN201822204495.6U Active CN209943225U (en) | 2018-12-26 | 2018-12-26 | Hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
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- 2018-12-26 CN CN201822204495.6U patent/CN209943225U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
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