CN114183415A - Efficient heavy-load press-fitting machine hydraulic system - Google Patents
Efficient heavy-load press-fitting machine hydraulic system Download PDFInfo
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- CN114183415A CN114183415A CN202111515057.1A CN202111515057A CN114183415A CN 114183415 A CN114183415 A CN 114183415A CN 202111515057 A CN202111515057 A CN 202111515057A CN 114183415 A CN114183415 A CN 114183415A
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- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 44
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention belongs to the field of press-mounting machines and discloses an efficient hydraulic system of a heavy-load press-mounting machine. The plunger type low-pressure vane pump comprises a plunger type cylinder, a plurality of auxiliary cylinders, a plurality of low-pressure vane pumps, a plurality of electromagnetic directional valves, a plurality of pressure plates and a plurality of pressure plates, wherein the upper chambers of the auxiliary cylinders are connected in parallel and then connected with one oil port of the electromagnetic directional valves; the plunger cylinder is connected with the high-level oil tank through a liquid charging valve and is also connected with an energy accumulator, and the energy accumulator is also connected with the high-pressure plunger pump through a proportional reversing valve; the hydraulic system adopts a double-pump control loop, wherein a high-pressure plunger pump is used for supplying oil to a plunger cylinder to realize the working feed of a compression leg; the low-pressure vane pump is used for supplying oil to the auxiliary cylinder to realize fast forward and fast backward of the compression column. The hydraulic system of the press-fitting machine is provided with the energy accumulator, so that oil compensation is performed on the system during pressure maintaining, and the pressure maintaining performance is improved. The hydraulic system of the press-mounting machine disclosed by the invention is used for gradually releasing pressure during pressure release, so that the vibration of equipment is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of press-mounting machines, and particularly relates to an efficient hydraulic system of a heavy-load press-mounting machine.
Background
The press-mounting machine is mainly used for mounting and dismounting parts, has a very wide application range, and can be seen in the body shadow of the press-mounting machine in the industries of transportation, electric power, building materials and the like. The press-mounting machine belongs to an application of a hydraulic machine, when the press-mounting work is carried out on parts, the main technological processes are fast forward, work forward, pressure maintaining and fast backward, and after the work steps are completed, a round of work cycle is completed. To improve the production efficiency of enterprises, the fast forward speed, fast backward speed and fast forward stroke of the press-mounting machine should be improved as much as possible on the premise of safety and reliability. The working-in stage is a key stage influencing the press-fitting quality, if the working-in speed is too fast, the quality of parts is seriously damaged, and the working-in speed is too slow, so that the production efficiency is not improved; the pressure maintaining performance is one of important performance indexes of the press-fitting machine, the pressure maintaining stage is of great importance for press-fitting forming of parts, so that the pressure maintaining performance of the pressure maintaining stage is very important, and after pressure maintaining is finished, impact on equipment caused by sudden release of too much hydraulic energy stored in the pressure maintaining stage is prevented due to slow pressure release, and the service life of the equipment is shortened.
Disclosure of Invention
Aiming at the problem that the existing press-mounting machine cannot ensure good pressure maintaining performance during working, the hydraulic structure of the press-mounting machine is improved, the high-pressure plunger pump and the low-pressure vane pump are used for simultaneously controlling the hydraulic circuit, and the accumulator is used for performing oil pressure compensation on the system during pressure maintaining, so that the pressure maintaining performance and the working efficiency of the press-mounting machine are improved.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
the invention comprises a high-pressure plunger pump, a low-pressure vane pump, a proportional reversing valve, an electromagnetic reversing valve, a high-level oil tank, an energy accumulator, a low-level oil tank and a compression column.
The plunger cylinder is connected with the plunger piston, the auxiliary cylinders are connected with the plunger piston, the upper cavities of the auxiliary cylinders are connected with one oil port of the electromagnetic directional valve after being connected in parallel, the lower cavities of the auxiliary cylinders are connected with the other oil port of the electromagnetic directional valve after being connected in parallel, and the electromagnetic directional valve is connected with the low-pressure vane pump through the one-way valve.
The plunger cylinder is connected with the high-level oil tank through a liquid charging valve and is also connected with an energy accumulator, and the energy accumulator is also connected with the high-pressure plunger pump through a proportional reversing valve.
The hydraulic system adopts a double-pump control loop, wherein a high-pressure plunger pump is used for supplying oil to a plunger cylinder to realize the working feed of a compression leg; the low-pressure vane pump is used for supplying oil to the auxiliary cylinder to realize fast forward and fast backward of the compression column.
When the system fast-forwards, oil of the low-pressure vane pump enters the upper cavity of the auxiliary cylinder through the electromagnetic reversing valve, the compression leg descends rapidly to drive the plunger cylinder to fast-forward, and negative pressure is formed in the plunger cavity of the plunger cylinder while the plunger cylinder fast-forwards to suck oil from the high-level oil tank.
When the pressure column contacts with a workpiece, the pressure in the system reaches a set pressure value, the pressure column is controlled to enter a working state, one part of oil of the high-pressure plunger pump enters the energy accumulator after passing through the proportional reversing valve, and the other part of the oil enters the plunger cylinder.
After the compression leg reaches the assigned position, under the control of the first travel switch, the hydraulic system enters a pressure maintaining state, and during pressure maintaining, the energy accumulator is used for supplementing oil leakage in the hydraulic system, so that the pressure maintaining performance of the system is improved.
After pressure maintaining is finished, oil of the low-pressure pump enters the lower cavity of the auxiliary cylinder through the electromagnetic reversing valve, the pressure column moves back quickly, the valve core of the liquid filling valve is opened under the control of the proportional reversing valve, the oil of the plunger cylinder enters the high-level oil tank, the second travel switch is triggered after the oil of the plunger cylinder moves back to the right position, and the press mounting process is finished.
Compared with the traditional press-mounting machine, the invention has the following advantages:
1. the hydraulic system of the press-fitting machine is provided with the energy accumulator, so that oil compensation is performed on the system during pressure maintaining, and the pressure maintaining performance is improved.
2. The two pumps of the hydraulic system of the press-loading machine can be unloaded by using the electromagnetic overflow valves outside respective working conditions, so that the system has better energy-saving property.
3. The hydraulic system of the press-mounting machine disclosed by the invention is used for gradually releasing pressure during pressure release, so that the vibration of equipment is effectively reduced.
4. The hydraulic system of the press-mounting machine is provided with four hydraulic cylinders, so that the load capacity of the press-mounting machine is greatly improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a hydraulic system diagram of a press-mounting machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in figure 1, the high-efficiency large-load press-fitting machine hydraulic system comprises a high-pressure plunger pump 8, a low-pressure vane pump 5, a proportional reversing valve 20, electromagnetic reversing valves 19 and 26, a high-level oil tank 30, an accumulator 32, a low-level oil tank 40 and a press column 43.
The compression leg 43 is connected with the plunger cylinder 25 and the four auxiliary cylinders 24.1, 24.2, 24.3 and 24.4, wherein the upper cavities of the auxiliary cylinders are connected in parallel and then connected with one liquid outlet of the electromagnetic directional valve 19, the upper cavities of the auxiliary cylinders are also connected with the high-level oil tank through the electromagnetic directional valve 26 and the one-way valve 28, the lower cavities of the auxiliary cylinders are connected in parallel and then connected with the other liquid outlet of the electromagnetic directional valve 19, and the electromagnetic directional valve is connected with the low-pressure vane pump 5 through the one-way valve 12.
The plunger cylinder 25 is connected with a high-level oil tank 30 through a liquid charging valve 29 and is also connected with an energy accumulator 32, the energy accumulator is also connected with the high-pressure plunger pump 8 through a proportional reversing valve 20, and the pipeline is provided with check valves 17.1 and 17.2.
The hydraulic system is a double-pump control loop, one of the two hydraulic pumps is a high-pressure small-flow plunger pump 8 for driving a plunger cylinder 25 to work, and the other one is a low-pressure large-flow vane pump 5 for supplying oil to an auxiliary cylinder 24 to realize fast forward and fast backward of a compression column.
The filters 1 and 41 are used for filtering impurities in oil liquid during oil inlet and oil outlet; the air filter 2 is used for filtering dust in the air and ensuring that sufficient and clean air enters the system; the temperature relays 3.1 and 3.2 are used for preventing the system from working normally due to overhigh temperature of oil; the liquid level relay 6 is used for preventing the amount of the oil liquid in the system from being too much or too little; the cooler 9 is used for reducing the temperature; the electromagnetic overflow valves 10 and 18 are used for preventing the pressure in the system from being too high and releasing partial pressure; the pressure relays 11.1, 11.2 and 16 are used for monitoring the pressure in the system, and when the pressure reaches a set value, the compression leg enters a working state; the pressure measuring joints 13.1, 13.2, 13.3, 13.4, 13.5, 13.6, 13.7, 13.8 and 13.9 and the pressure gauges 14.1, 14.2, 14.3 and 14.4 are used for detecting the system pressure; the high-precision oil-pressing pipeline oil filter 15 is used for filtering oil entering the proportional reversing valve 20; the balance valve 22 and the one-way throttle valves 23.1, 23.2 and 31 are used for adjusting the flow rate of oil liquid, so that the hydraulic cylinder is prevented from falling due to self weight; a stop ball valve 33 is used to seal the system; the liquid level and temperature meter 34 is used for displaying the liquid level height and temperature of the hydraulic oil; the couplings 35 and 36 are used for connecting the hydraulic pump and the motors 4 and 7; the pressure measuring hoses 37.1, 37.2 and 37.3 are used for monitoring the system pressure; the heater 38 is used for heating the oil liquid to enable the initial temperature of the oil liquid to reach the lowest working temperature; the safety ball valve 39 for the accumulator is used for protecting the accumulator and removing partial pressure when the pressure is too high; the electromagnetic water valve 42 is used for automatically controlling the on-off of the pipeline.
The system has the working flow as follows:
when the system fast-forwards, oil of the low-pressure vane pump 5 enters the upper cavity of the auxiliary cylinder, the compression leg 43 descends rapidly to drive the plunger cylinder 25 to fast-forward, and negative pressure is formed in the plunger cavity of the plunger cylinder 25 while the plunger cylinder 25 fast-forwards to suck oil from the high-level oil tank 30. When the pressure column contacts the workpiece, the pressure column is controlled to enter a working state along with the pressure in the system reaching a set value of the pressure relay. After the system reaches the designated position, the system enters a pressure maintaining state under the control of the first travel switch 21.1, an energy accumulator 32 is arranged in the system, the energy accumulator 32 only conducts electricity to the port 5YA of the electromagnetic ball valve 27 in the system working process and the pressure maintaining process, when the system works, one part of oil liquid of the high-pressure plunger pump 8 enters the energy accumulator 32, and when the pressure is maintained, the energy accumulator 32 can supplement leakage in the system, so that the pressure maintaining performance of the system is improved. After pressure maintaining is finished, oil liquid of the low-pressure vane pump 5 enters a lower cavity of the auxiliary cylinder 24, the pressure column moves back quickly, a valve core of a liquid filling valve 29 is opened under the control of the proportional reversing valve 20, the oil liquid of the system can enter a high-level oil tank 30, the speed of the pressure column moving back can be adjusted through the one-way throttle valve 23, after the pressure column moves back to the right position, the second travel switch 21.2 on the pressure column is triggered, and the press mounting process is finished.
Furthermore, a proportional reversing valve 20 is adopted in the plunger cylinder system, after pressure maintaining of the system is finished, a smaller current value is given by the proportional reversing valve 20, the valve core opening of the proportional valve is reduced, the pressure entering the liquid filling valve 29 to control the valve core is reduced, different current values are given in different pressure relief stages, the opening of the liquid filling valve 29 is gradually opened, gradual pressure relief of the system is achieved, vibration of equipment is effectively reduced, and the service life of the equipment is prolonged.
Furthermore, the high-precision oil-pressing pipeline oil filter 15 is arranged on the oil-pressing pipeline of the plunger cylinder system, so that the cleanliness of oil entering the hydraulic system is improved, and the service life of the proportional reversing valve 20 with high requirement on the cleanliness of the oil can be greatly prolonged; the system uses pressure measuring joints 13.1-13.9 at different point positions, when the system fails, the failure reason of the system is judged by detecting pressure values at different point positions of the system, and the system is very useful for maintenance of the system.
Furthermore, the overflow valves of the system adopt electromagnetic overflow valves 10 and 18 with unloading functions, in different procedures, different electromagnetic overflow valves are electrified, so that the high-pressure plunger pump 8 and the low-pressure vane pump 5 are respectively unloaded, the energy loss is reduced, the energy saving performance of the system is improved, and the unloaded starting of the pumps is realized by adopting the electromagnetic overflow valves.
Further, the various steps must be performed sequentially in coordination with the actuation of the electromagnets, as shown in the following table. Since a and b are proportional reversing valves, how much current value is given in actual production is not determined and cannot be stated as "+" - ".
Through the technical improvement, the pressure maintaining performance and the working efficiency of the press-mounting machine can be improved, the defective rate of enterprises is reduced, and the production profits of the enterprises are improved.
Claims (5)
1. The utility model provides an efficient heavy load pressure equipment machine hydraulic system, includes high-pressure plunger pump, low pressure vane pump, proportional reversing valve, electromagnetic directional valve, high-order oil tank, energy storage ware, low-order oil tank and compression leg, its characterized in that:
the plunger cylinder and the auxiliary cylinders are connected, wherein the upper cavities of the auxiliary cylinders are connected in parallel and then connected with one oil port of the electromagnetic directional valve, the lower cavities of the auxiliary cylinders are connected in parallel and then connected with the other oil port of the electromagnetic directional valve, and the electromagnetic directional valve is connected with the low-pressure vane pump through a one-way valve;
the plunger cylinder is connected with the high-level oil tank through a liquid charging valve and is also connected with an energy accumulator, and the energy accumulator is also connected with the high-pressure plunger pump through a proportional reversing valve;
the hydraulic system adopts a double-pump control loop, wherein a high-pressure plunger pump is used for supplying oil to a plunger cylinder to realize the working feed of a compression leg; the low-pressure vane pump is used for supplying oil to the auxiliary cylinder to realize fast forward and fast backward of the compression column;
when the system fast forwards, oil of the low-pressure vane pump enters the upper cavity of the auxiliary cylinder through the electromagnetic reversing valve, the compression leg descends rapidly to drive the plunger cylinder to fast forward, and negative pressure is formed in the plunger cavity of the plunger cylinder while the plunger cylinder fast forwards to suck oil from the high-level oil tank;
when the pressure column contacts a workpiece, the pressure in the system reaches a set pressure value, the pressure column is controlled to enter a working state, one part of oil of the high-pressure plunger pump enters an energy accumulator after passing through the proportional reversing valve, and the other part of the oil enters the plunger cylinder;
after the pressure column reaches a designated position, under the control of the first travel switch, the hydraulic system enters a pressure maintaining state, and during pressure maintaining, the energy accumulator is used for supplementing oil leakage in the hydraulic system and improving the pressure maintaining performance of the system;
after pressure maintaining is finished, oil of the low-pressure pump enters the lower cavity of the auxiliary cylinder through the electromagnetic reversing valve, the pressure column moves back quickly, the valve core of the liquid filling valve is opened under the control of the proportional reversing valve, the oil of the plunger cylinder enters the high-level oil tank, the second travel switch is triggered after the oil of the plunger cylinder moves back to the right position, and the press mounting process is finished.
2. An efficient heavy load press-fitting machine hydraulic system as claimed in claim 1, wherein: after the system is pressurized, the proportional reversing valve is used for giving a smaller current value, the opening degree of the valve core of the proportional valve is reduced, so that the output pressure and the flow entering the valve core of the liquid filling valve are smaller, different current values are given at different pressure relief stages, the opening degree of the liquid filling valve is gradually opened, the gradual pressure relief of the hydraulic system is realized, the vibration of the press-mounting machine is effectively reduced, and the service life of the press-mounting machine is prolonged.
3. An efficient heavy load press-fitting machine hydraulic system as claimed in claim 1, wherein: the hydraulic system uses the pressure measuring joint at different point positions, when the system breaks down, the failure reason of the system is judged by detecting the pressure values of different point positions of the system, and the system is very useful for maintenance of the hydraulic system.
4. An efficient heavy load press-fitting machine hydraulic system as claimed in claim 1, wherein: the hydraulic system is also provided with an overflow valve, the overflow valve adopts an electromagnetic overflow valve with an unloading function, in different working procedures, different electromagnetic overflow valves are electrified, so that the high-pressure plunger pump and the low-pressure vane pump are respectively unloaded, the energy loss is reduced, the energy saving performance of the hydraulic system is improved, and the unloaded starting of the pump is realized by adopting the electromagnetic overflow valve.
5. An efficient heavy load press-fitting machine hydraulic system as claimed in claim 1, wherein: and a one-way throttle valve and a balance valve are also arranged between the lower cavity of the auxiliary cylinder and the other oil port of the electromagnetic directional valve, and the fast-moving speed of the compression column can be adjusted through the one-way throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515057.1A CN114183415A (en) | 2021-12-13 | 2021-12-13 | Efficient heavy-load press-fitting machine hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515057.1A CN114183415A (en) | 2021-12-13 | 2021-12-13 | Efficient heavy-load press-fitting machine hydraulic system |
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| CN114183415A true CN114183415A (en) | 2022-03-15 |
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| CN202111515057.1A Pending CN114183415A (en) | 2021-12-13 | 2021-12-13 | Efficient heavy-load press-fitting machine hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962279A (en) * | 2012-12-11 | 2013-03-13 | 阎善武 | Reverse extruder |
| CN103586675A (en) * | 2013-11-22 | 2014-02-19 | 南京埃尔法电液技术有限公司 | Hydraulic system of press fitting device |
| CN204267432U (en) * | 2014-11-19 | 2015-04-15 | 天水锻压机床(集团)有限公司 | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system |
| CN105298945A (en) * | 2015-11-27 | 2016-02-03 | 南通锻压设备股份有限公司 | Hydraulic system of quick pressing type hydraulic press |
| CN108591145A (en) * | 2018-04-14 | 2018-09-28 | 晋江市火炬油压机械有限公司 | A kind of hydraulic system applied in the small foaming machines of wall board type EVA |
| CN213809142U (en) * | 2020-11-24 | 2021-07-27 | 沈阳奥林液压装备制造有限公司 | Energy-saving full-hydraulic control butterfly valve hydraulic system for water and electricity |
-
2021
- 2021-12-13 CN CN202111515057.1A patent/CN114183415A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962279A (en) * | 2012-12-11 | 2013-03-13 | 阎善武 | Reverse extruder |
| CN103586675A (en) * | 2013-11-22 | 2014-02-19 | 南京埃尔法电液技术有限公司 | Hydraulic system of press fitting device |
| CN204267432U (en) * | 2014-11-19 | 2015-04-15 | 天水锻压机床(集团)有限公司 | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system |
| CN105298945A (en) * | 2015-11-27 | 2016-02-03 | 南通锻压设备股份有限公司 | Hydraulic system of quick pressing type hydraulic press |
| CN108591145A (en) * | 2018-04-14 | 2018-09-28 | 晋江市火炬油压机械有限公司 | A kind of hydraulic system applied in the small foaming machines of wall board type EVA |
| CN213809142U (en) * | 2020-11-24 | 2021-07-27 | 沈阳奥林液压装备制造有限公司 | Energy-saving full-hydraulic control butterfly valve hydraulic system for water and electricity |
Non-Patent Citations (2)
| Title |
|---|
| 左英杰等: "压装机液压系统改进", 液压与气动, vol. 1, no. 2012, 15 April 2012 (2012-04-15), pages 66 - 67 * |
| 左英杰等: "压装机液压系统改进", 液压与气动, vol. 1, no. 2012, pages 66 - 67 * |
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