CN202007802U - Hydraulic system - Google Patents
Hydraulic system Download PDFInfo
- Publication number
- CN202007802U CN202007802U CN 201120132415 CN201120132415U CN202007802U CN 202007802 U CN202007802 U CN 202007802U CN 201120132415 CN201120132415 CN 201120132415 CN 201120132415 U CN201120132415 U CN 201120132415U CN 202007802 U CN202007802 U CN 202007802U
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- pump
- oil
- hydraulic system
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Abstract
The utility model discloses a hydraulic system which comprises an oil tank, an oil pump and an oil cylinder combination, wherein the oil cylinder combination comprises an upper oil cylinder combination and a lower oil cylinder combination; and the oil pump is particularly a duplex pump consisting of a high-pressure pump and a low-pressure pump. The hydraulic system further comprises a pressurizing loop and a pressure release loop, wherein an upper oil cylinder in the pressurizing loop is particularly a double-acting oil cylinder respectively connected with the high-pressure pump and the low-pressure pump through pipelines; a first valve and a third valve are respectively arranged on the two pipelines, a lower cylinder is connected with the high-pressure pump, a second valve is arranged between the lower oil cylinder and the high-pressure pump, and a one-way valve is arranged on the pipeline near the output end of the oil pump; the pressure release loop comprises a fourth valve, the output end of the fourth valve is connected with the oil tank, the other end of the fourth valve is respectively connected with the first valve and the second valve, the fourth valve is connected in parallel with a proportional overflow valve, and the first valve is connected with the oil tank. As the proportional overflow valve is arranged, the automatic pressurizing of the hydraulic system is realized; due to the matching between the oil cylinder combination and each hydraulic valve body, the automatic controlling and adjusting of an interval of a pressing wheel are realized; moreover, the controlling precision of the interval of the pressing wheel is improved.
Description
Technical field
The utility model relates to a kind of hydraulic system, relates in particular to a kind of hydraulic system that can control the pinch roller gap.
Background technique
Pinch roller is when work, and the gap between the pinch roller need be regulated according to the product of actual production, so that the thickness of the product of producing meets the requirements.Traditional pinch roller gap is generally regulated by manual operation, can not automatically adjust according to product, and simultaneously degree of regulation is not high, and the thickness between the product of production is existed than mistake.Pinch roller gap after the improvement is generally by HYDRAULIC CONTROL SYSTEM.Hydraulic system as working medium, is utilized the pressure of fluid and by the work of the operating hydraulically operated actuator of annexes such as control valve with fluid.Hydraulic system generally comprises five parts, i.e. dynamical element, executive component, control unit, auxiliary element and hydraulic oil.Dynamical element is generally oil pump, and oil pump provides power for whole hydraulic system.Executive component is generally oil cylinder combination, and the pressure of liquid is converted to mechanical energy, does straight reciprocating motion or rotation motion thereby drive load.Control unit is the various hydrovalves in the hydraulic system, control and pressure, flow and the direction of regulating liquid.At present, control pinch roller of the prior art gap the hydraulic system automaticity not high, control effect relatively poor, control accuracy is low.
Summary of the invention
The purpose of this utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a kind of automaticity height, can accurately control the hydraulic system in pinch roller gap.
To achieve these goals, the utility model has adopted following technological scheme:
A kind of hydraulic system, comprise fuel tank, oil pump and oil cylinder combination, described oil cylinder combination comprises upper cylinder combination and the combination of following oil cylinder, described oil pump is a duplex pump, duplex pump is made up of high-pressure service pump and low pressure pump, also comprise and add hydraulic circuit and pressure release loop, the oil cylinder that adds the upper cylinder combination in the hydraulic circuit is a two-way cylinder, interconnect with the high-pressure service pump and the low pressure pump of oil pump respectively by pipeline, be respectively equipped with first valve and the 3rd valve on two pipelines, following oil cylinder is connected with the high-pressure service pump of oil pump by pipeline, the pipeline that both are connected is provided with second valve, pipeline place near the oil pump output terminal is provided with one-way valve, described pressure release loop comprises the 4th valve, and the output terminal of the 4th valve is connected with fuel tank, and the other end is connected with second valve with first valve respectively, the 4th valve is in parallel with a proportional pressure control valve by pipeline, and first valve is connected with fuel tank by pipeline.
As preferably, also comprise relief valve, relief valve one end is connected with the pipeline of close oil pump output, and the joint is between one-way valve and oil pump, and the other end of relief valve is connected with fuel tank.After adopting above-mentioned preferred version; when the pressure of the hydraulic oil of carrying to pipeline when oil pump is excessive; send unnecessary hydraulic fluid flow rate back to fuel tank by relief valve; thereby make the pressure in the pipeline be no more than setting value; hydraulic system is shielded; avoid hydraulic system to damage, improve the working life of hydraulic system because of excessive pressure.
As preferably, described first valve, second valve and the 3rd valve are solenoid valve, and described the 4th valve is a reflux valve.After adopting above-mentioned preferred version, further improved the automaticity of the utility model hydraulic system.
As preferably, the pipeline that described first valve is connected with fuel tank is provided with back pressure valve.After adopting above-mentioned preferred version, under the state of the hydraulic pressure shakiness in pipeline, keep the required pressure of pipeline, make the flow in the pipeline keep normal.
As preferably, described proportional pressure control valve is an electricity liquid ratio relief valve.After adopting above-mentioned preferred version, the preferred electricity liquid ratio relief valve of proportional pressure control valve has been realized the automatic pressurization function of the utility model hydraulic system, the user of service can utilize control system that the hydraulic parameter of hydraulic system directly is set, make electricity liquid ratio relief valve regulate the flow that enters the hydraulic oil in the hydraulic tubing pari passu according to the parameter of input, thus the pressure of automatic controlled hydraulic system.
As preferably, the entry end of described proportional pressure control valve is provided with accumulator.After adopting above-mentioned preferred version, when needed flow in the hydraulic system during less than the oil hydraulic pump flow, the unnecessary flow of oil hydraulic pump stores up into accumulator, when needed flow in the hydraulic system during greater than the oil hydraulic pump flow, hydraulic fluid is released from accumulator, with the deficiency of fluid infusion press pump flow.In addition, when hydraulic system quits work but still need keep certain pressure the time, can the stop solution press pump and by the leakage of accumulator bucking-out system, to keep the pressure of system.
As preferably, be connected with oil filter on the described fuel tank, be connected with oil filter on the described oil pump.After adopting above-mentioned preferred version, hydraulic system of the present utility model is filtered the fluid that enters oil pump, avoids foreign particle and pollutant to enter in fuel tank and the pipeline, prevents that hydraulic system from stopping up and damage, and make hydraulic oil meet standard, improve the precision in control pinch roller gap.
First valve of the present utility model is a two position three-way valve, and second valve is a two position two-way valve.
Compared with prior art, hydraulic system of the present utility model is provided with proportional pressure control valve, realized the automatic pressurization of hydraulic system, utilize cooperating of oil cylinder combination and each hydraulic valve, utilize the pump housing as power plant, realize the automatic control and adjustment in pinch roller gap, and improved the precision of pinch roller gap control.
Description of drawings
Fig. 1 is the utility model embodiment's a schematic representation.
Embodiment
As shown in Figure 1, embodiment of the present utility model specifically is a kind of hydraulic system, a kind of hydraulic system, comprise fuel tank 1, oil pump 3 and oil cylinder combination 2, oil cylinder combination 2 comprises upper cylinder combination 21 and following oil cylinder combination 22, and oil pump 3 is a duplex pump, and oil pump 3 is connected with a motor 5.Duplex pump is made up of high-pressure service pump 31 and low pressure pump 32, also comprise and add hydraulic circuit and pressure release loop, the oil cylinder that adds the upper cylinder combination 21 in the hydraulic circuit is a two-way cylinder, upper cylinder combination 21 is made up of two upper cylinders 211, upper cylinder 211 is a two-way cylinder, following oil cylinder combination 22 is made up of two following oil cylinders 221, and following oil cylinder 221 is an one-way cylinder.Upper cylinder 211 by pipeline with interconnect with the high-pressure service pump 31 and the low pressure pump 32 of oil pump 3 respectively, be respectively equipped with first valve 9 and the 3rd valve 11 on two pipelines, first valve 9 and the 3rd valve 11 are solenoid valve, and first valve 9 is a two position three-way valve, and the 3rd valve 11 is a two position two-way valve.Following oil cylinder 22 is connected with the high-pressure service pump 31 of oil pump 3 by pipeline, and it is solenoid valve that the pipeline that both are connected is provided with second valve, 10, the second valves 10, is similarly two position two-way valve, and the pipeline place of close oil pump 3 output terminals is provided with one-way valve 15.The pressure release loop comprises the 4th valve 13, the 4th valve 13 is a reflux valve, the output terminal of the 4th valve 13 is connected with fuel tank 1, the other end is connected with second valve 10 with first valve 9 respectively, the 4th valve 13 is in parallel with a proportional pressure control valve 14 by pipeline, proportional pressure control valve 14 is an electricity liquid ratio relief valve, and the entry end of proportional pressure control valve 14 is provided with accumulator 12 and pressure gauge 7.First valve 9 is connected with fuel tank 1 by pipeline, and the pipeline that first valve 9 is connected with fuel tank 1 is provided with back pressure valve 8.
Hydraulic system of the present utility model also comprises two relief valves 6, and relief valve 6 one ends are connected with the pipeline of close oil pump 3 outputs, and the joint is between one-way valve 15 and oil pump 3.The other end of relief valve 6 is connected with fuel tank 1.Be connected with oil filter 4 on the fuel tank 1, all be connected with oil filter 4 on the high-pressure service pump 31 of oil pump 3 and the low pressure pump 32.
The pipeline of the utility model hydraulic system is high-pressure rubber pipe 16.In addition, the pipeline that is communicated with low pressure pump of hydraulic system first valve of the present utility model is provided with pressure gauge 7.
Hydraulic system of the present utility model is when work, and pinch roller is arranged on the upper cylinder 211, and following oil cylinder 221 is provided with the auxiliary system of pinch roller.During work, at first open motor 5, oil pump 3, open second valve 10, and first valve 9, the 3rd valve 11 and the 4th valve 13 are off state, at this moment, the pressure of hydraulic oil in the pipeline is set on proportional pressure control valve 14, and the pinch roller gap that needs is set in the control system of this hydraulic system.First valve 9 is a two position three-way valve, when not opening, first valve 9 is communicated with the lower chambers and the fuel tank 1 of upper cylinders 211, and hydraulic oil is delivered to the lower chambers of upper cylinder 211 by low pressure pump 32, and the 3rd valve 11 is a two position two-way valve, when not opening, the pipeline that two position two-way valve was communicated with is in off state, and the plunger of upper cylinder 211 inside rises to peak, and the drive pinch roller rises to peak, at this moment, the gap between the pinch roller reaches maximum value.
Secondly, open first valve 9 and the 3rd valve 11, the 3rd valve 11 is a two position two-way valve, and after the unlatching, the pipeline that is connected is in connected state, the high-pressure service pump 31 of oil pump 3 is delivered to hydraulic oil the upper chamber of upper cylinder 211, pinch roller is exerted pressure, and after first valve 9 was opened, the lower chambers of upper cylinder 211 was communicated with fuel tank 1 by first valve 9 and back pressure valve 8, form and reflux, pinch roller steadily descends under the effect of pressure.
When the pinch roller gap reaches setting value, control system automatic disconnection first valve 9 of hydraulic system, upper cylinder 211 is cut off with the backflow of fuel tank 1, fuel tank 1 passes through the lower chambers delivery hydraulic pressure oil of low pressure pump 32 continuation of oil pump 3 to upper cylinder 211, and forming balance with hydraulic oil in the upper chamber of upper cylinder 211, pinch roller stops to descend.Stop oil pump 3 after the pressure stability in the hydraulic system, the adjustment of pinch roller gap finishes, and pinch roller can begin to work normally.
When after hours, setting the pinch roller gap is 0, opens first valve 9, disconnects second valve 10, behind the pinch roller return, disconnects first valve 9 and the 3rd valve 11, opens the 4th valve 13, and pressure release refluxes.
The pinch roller of hydraulic system of the present utility model is provided with the electronic ruler detection device, can detect and feed back to control system to the gap between the pinch roller.The pinch roller interstice coverage that the utility model hydraulic system can be regulated is 0.4～5mm, and control accuracy is 0.1mm, and the downward speed of pinch roller is 0.4mm/s.More than the utility model is carried out concrete description for embodiment; only be used for the utility model is further specified; can not be interpreted as the qualification to the utility model protection domain, the technician in this field can make some nonessential improvement and adjustment to the utility model according to the content of above-mentioned model utility.
Claims (7)
1. hydraulic system, comprise fuel tank, oil pump and oil cylinder combination, described oil cylinder combination comprises upper cylinder combination and the combination of following oil cylinder, described oil pump is a duplex pump, duplex pump is made up of high-pressure service pump and low pressure pump, it is characterized in that: also comprise adding hydraulic circuit and pressure release loop, the oil cylinder that adds the upper cylinder combination in the hydraulic circuit is a two-way cylinder, by pipeline with interconnect with the high-pressure service pump and the low pressure pump of oil pump respectively, be respectively equipped with first valve and the 3rd valve on two pipelines, following oil cylinder is connected with the high-pressure service pump of oil pump by pipeline, the pipeline that both are connected is provided with second valve, pipeline place near the oil pump output terminal is provided with one-way valve, described pressure release loop comprises the 4th valve, and the output terminal of the 4th valve is connected with fuel tank, and the other end is connected with second valve with first valve respectively, the 4th valve is in parallel with a proportional pressure control valve by pipeline, and first valve is connected with fuel tank by pipeline.
2. hydraulic system according to claim 1 is characterized in that: also comprise relief valve, relief valve one end is connected with the pipeline of close oil pump output, and the joint is between one-way valve and oil pump, and the other end of relief valve is connected with fuel tank.
3. hydraulic system according to claim 1 is characterized in that: described first valve, second valve and the 3rd valve are solenoid valve, and described the 4th valve is a reflux valve.
4. hydraulic system according to claim 1 is characterized in that: the pipeline that described first valve is connected with fuel tank is provided with back pressure valve.
5. hydraulic system according to claim 5 is characterized in that: described proportional pressure control valve is an electricity liquid ratio relief valve.
6. hydraulic system according to claim 1 or 5, it is characterized in that: the entry end of described proportional pressure control valve is provided with accumulator.
7. hydraulic system according to claim 1 is characterized in that: be connected with oil filter on the described fuel tank, be connected with oil filter on the described oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120132415 CN202007802U (en) | 2011-04-29 | 2011-04-29 | Hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120132415 CN202007802U (en) | 2011-04-29 | 2011-04-29 | Hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202007802U true CN202007802U (en) | 2011-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120132415 Expired - Lifetime CN202007802U (en) | 2011-04-29 | 2011-04-29 | Hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202007802U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493968A (en) * | 2011-12-30 | 2012-06-13 | 北京理工大学 | Method and device for energy-saving control of elastic load based on electrohydraulic servo drive |
| CN102582606A (en) * | 2012-03-16 | 2012-07-18 | 上海庞丰交通设备科技有限公司 | Hydraulic brake device |
| CN102814468A (en) * | 2012-08-22 | 2012-12-12 | 枣庄天源气动液压制造有限公司 | Hydraulic system for automatic sand mold molding machine |
| CN103573729A (en) * | 2013-11-19 | 2014-02-12 | 贵阳高原矿山机械股份有限公司 | Mine hoist hydraulic station |
| CN104948518A (en) * | 2015-05-06 | 2015-09-30 | 湖州双力自动化科技装备有限公司 | Thermocompressor system |
| CN105151373A (en) * | 2015-08-06 | 2015-12-16 | 枣庄新中兴实业有限责任公司 | Operation technology of hydraulic system of packing machine |
| CN106351894A (en) * | 2016-10-21 | 2017-01-25 | 燕山大学 | Open model pump control load cavity independent control asymmetrical cylinder power unit |
| CN108443269A (en) * | 2018-03-23 | 2018-08-24 | 浙江迦南科技股份有限公司 | A kind of unidirectional speed-limiting device |
-
2011
- 2011-04-29 CN CN 201120132415 patent/CN202007802U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493968A (en) * | 2011-12-30 | 2012-06-13 | 北京理工大学 | Method and device for energy-saving control of elastic load based on electrohydraulic servo drive |
| CN102493968B (en) * | 2011-12-30 | 2014-10-22 | 北京理工大学 | Method for energy-saving control of elastic load based on electrohydraulic servo drive |
| CN102582606B (en) * | 2012-03-16 | 2015-05-20 | 上海庞丰交通设备科技有限公司 | Hydraulic brake device |
| CN102582606A (en) * | 2012-03-16 | 2012-07-18 | 上海庞丰交通设备科技有限公司 | Hydraulic brake device |
| CN102814468A (en) * | 2012-08-22 | 2012-12-12 | 枣庄天源气动液压制造有限公司 | Hydraulic system for automatic sand mold molding machine |
| CN102814468B (en) * | 2012-08-22 | 2014-03-05 | 枣庄天源气动液压制造有限公司 | Hydraulic system for automatic sand mold molding machine |
| CN103573729A (en) * | 2013-11-19 | 2014-02-12 | 贵阳高原矿山机械股份有限公司 | Mine hoist hydraulic station |
| CN104948518A (en) * | 2015-05-06 | 2015-09-30 | 湖州双力自动化科技装备有限公司 | Thermocompressor system |
| CN104948518B (en) * | 2015-05-06 | 2017-03-15 | 湖州双力自动化科技装备有限公司 | A kind of heating press system |
| CN105151373A (en) * | 2015-08-06 | 2015-12-16 | 枣庄新中兴实业有限责任公司 | Operation technology of hydraulic system of packing machine |
| CN105151373B (en) * | 2015-08-06 | 2017-06-06 | 枣庄新中兴实业有限责任公司 | A kind of operating procedure of machine hydraulic system of packing |
| CN106351894A (en) * | 2016-10-21 | 2017-01-25 | 燕山大学 | Open model pump control load cavity independent control asymmetrical cylinder power unit |
| CN108443269A (en) * | 2018-03-23 | 2018-08-24 | 浙江迦南科技股份有限公司 | A kind of unidirectional speed-limiting device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111012 |