CN112268027A - Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil - Google Patents

Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil Download PDF

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Publication number
CN112268027A
CN112268027A CN202011207320.6A CN202011207320A CN112268027A CN 112268027 A CN112268027 A CN 112268027A CN 202011207320 A CN202011207320 A CN 202011207320A CN 112268027 A CN112268027 A CN 112268027A
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China
Prior art keywords
oil
liquid filling
liquid
main working
die forging
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Pending
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CN202011207320.6A
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Chinese (zh)
Inventor
张君
李俊辉
杨红娟
薛菲菲
柴星
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China National Heavy Machinery Research Institute Co Ltd
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China National Heavy Machinery Research Institute Co Ltd
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Priority to CN202011207320.6A priority Critical patent/CN112268027A/en
Publication of CN112268027A publication Critical patent/CN112268027A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/001—Servomotor systems with fluidic control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/255—Flow control functions
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/465—Flow control with pressure compensation
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Abstract

The invention belongs to the technical field of metallurgical equipment, and particularly relates to a quick liquid filling system and a quick liquid filling method for a multi-main working plunger cylinder of a large die forging press for changing water into oil. On the basis of two liquid filling tanks and eight main working plunger cylinders on the original die forging press, the quick liquid filling system for the multiple main working plunger cylinders of the large die forging press for changing water into oil is formed by additionally arranging two oil tanks, eight liquid filling valves, four low-pressure compensators, a liquid filling tank oil supplementing device and a liquid filling tank oil discharging device, so that the eight main working plunger cylinders of the 300MN die forging press which is upgraded and improved can quickly fill and discharge liquid when a moving beam is quickly moved, and the running speed and the running stability of the die forging press are effectively improved.

Description

Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil
Technical Field
The invention belongs to the technical field of metallurgical equipment, and particularly relates to a quick liquid filling system and a quick liquid filling method for a multi-main working plunger cylinder of a large die forging press for changing water into oil.
Background
A300 MN die forging hydraulic press for national treasure equipment built in the last 70 th century in China drives a movable cross beam by adopting a mode of driving 8 main working plunger cylinders. After the 300MN die forging hydraulic press is used for many years, particularly the rapid development of scientific technology in the years, the equipment is out of date, the defects of hydraulic drive are obvious, the energy consumption of the equipment is high, the operation precision is poor, and the working environment of the whole machine is poor, so that the upgrading and the reconstruction of the equipment are urgent. After the movable cross beam is upgraded and modified into an oil press, a large amount of liquid instantly rushes in when the movable cross beam rapidly descends and a large amount of liquid instantly discharges when the movable cross beam rapidly ascends to form a control problem.
Disclosure of Invention
The invention provides a quick liquid charging system and a quick liquid charging method for a multi-main working plunger cylinder of a large die forging press for changing water into oil, and aims to enable eight main working plunger cylinders of an upgraded 300MN die forging press to be quickly charged and discharged when a movable beam moves quickly, and improve the running speed and the stability of the press.
In order to achieve the purpose, the invention adopts the technical scheme that:
the quick liquid filling system for the multiple main working plunger cylinders of the large die forging press for changing water into oil at least comprises two liquid filling tanks and eight main working plunger cylinders; the oil-filling system also comprises two oil tanks, eight liquid-filling valves, four low-pressure compensators, a liquid-filling tank oil-supplementing device and a liquid-filling tank oil-discharging device; the upper ports of the eight main working plunger cylinders are respectively provided with a liquid charging valve; the four low-pressure compensators are fixed on an upper platform of the die forging press and are communicated through hydraulic pipelines; each two of the eight liquid charging valves are fixedly connected with a low-pressure compensator through a hydraulic pipeline; the two liquid filling tanks are placed in pits on the edge of the die forging press and are respectively connected with four low-pressure compensators positioned on the upper part of the die forging press through hydraulic pipelines; the oil-filling device comprises two oil tanks, a liquid-filling tank oil supplementing device and a liquid-filling tank oil discharging device, wherein the two oil tanks are respectively arranged in parallel, the liquid-filling tank oil supplementing device and the two oil tanks are arranged between the two oil tanks, the input end of the liquid-filling tank oil supplementing device is communicated with the two oil tanks in parallel, the output end of the liquid-filling tank oil supplementing device is communicated with the two liquid-filling tanks in parallel, the input end of the liquid-filling tank oil discharging device is communicated with the two liquid-filling tanks in parallel, and the output end of the liquid-filling tank oil supplementing device.
The volumes of the two liquid filling tanks are both 35m3～40m3。
The hydraulic pipeline is a telescopic pipeline.
The four low-pressure compensators are higher than the eight liquid filling valves.
The device also comprises a PLC controller; and the PLC is respectively in electric signal connection with the eight main working plunger cylinders.
The oil supplementing device of the liquid filling tank comprises a screw pump, a filter and a one-way valve; the screw pump is characterized in that an oil suction port of the screw pump is connected with the oil tank, an outlet of the screw pump is connected with an inlet of the filter, an outlet of the filter is connected with an inlet of the one-way valve, and an outlet of the one-way valve is connected with the liquid charging tank.
The oil discharge device of the liquid filling tank comprises an electromagnetic oil drain valve and an overflow valve; the electromagnetic oil drain valve is connected with the overflow valve in parallel, the inlets of the electromagnetic oil drain valve and the overflow valve are both connected with the liquid filling tank, and the outlets of the electromagnetic oil drain valve and the overflow valve are both connected with the oil tank.
The fast liquid flushing method for the fast liquid filling system of the multi-main working plunger cylinder of the large die forging press for changing water into oil comprises the following steps,
the method comprises the following steps: when the moving beam of the die forging press descends rapidly, entering the second step; when the die forging press performs pressurization work, entering the step three; when the movable beam quickly rises, the method goes to step four:
step two: the PLC controller controls the eight liquid filling valves to be opened completely, the four low-pressure compensators are directly communicated with the eight main working plunger cylinders, and oil liquid of the four low-pressure compensators directly and quickly enters the eight main working plunger cylinders; finishing the rapid descending of the movable beam;
step three: the PLC controller controls the eight liquid filling valves to be closed, and high-pressure oil enters the eight main working plunger cylinders through the pipelines to complete die forging of the forge piece;
step four: the PLC controller controls the eight liquid filling valves to be opened completely, the four low-pressure compensators are directly communicated with the eight main working plunger cylinders again, and oil in the eight main working plunger cylinders is quickly pressed back into the low-pressure compensators due to the movable cross beam to complete quick rising of the movable cross beam.
Has the advantages that:
on the basis of two liquid filling tanks and eight main working plunger cylinders on the original die forging press, the quick liquid filling system for the multiple main working plunger cylinders of the large die forging press for changing water into oil is formed by additionally arranging two oil tanks, eight liquid filling valves, four low-pressure compensators, a liquid filling tank oil supplementing device and a liquid filling tank oil discharging device, so that the eight main working plunger cylinders of the 300MN die forging press which is upgraded and improved can quickly fill and discharge liquid when a moving beam is quickly moved, and the running speed and the running stability of the die forging press are effectively improved.
The foregoing is a summary of the present invention, and the following is a detailed description of the preferred embodiments of the present invention in order to provide a more clear understanding of the technical features of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1-an oil tank; 2-liquid filling tank; 3-a liquid filling valve; 4-a low pressure compensator; 5-filling the fluid reservoir to mend the oil device; 6-oil discharge device of liquid filling tank; 7-moving the beam; 8-main working plunger cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the rapid liquid filling system for multiple main working plunger cylinders of a large die forging press for changing water into oil at least comprises two liquid filling tanks 2 and eight main working plunger cylinders 8; the device also comprises two oil tanks 1, eight liquid filling valves 3, four low-pressure compensators 4, a liquid filling tank oil supplementing device 5 and a liquid filling tank oil discharging device 6; the upper ports of the eight main working plunger cylinders 8 are respectively provided with a liquid charging valve 3; the four low-pressure compensators 4 are fixed on an upper platform of the die forging press, and the four low-pressure compensators 4 are communicated through hydraulic pipelines; each two charging valves 3 of the eight charging valves 3 are respectively and fixedly connected with a low-pressure compensator 4 through hydraulic pipelines; the two liquid filling tanks 2 are placed in pits on the edge of the die forging press and are respectively connected with four low-pressure compensators 4 positioned on the upper part of the die forging press through hydraulic pipelines; the two liquid filling tanks 2 and the two oil tanks 1 are respectively arranged in parallel, a liquid filling tank oil supplementing device 5 and a liquid filling tank oil discharging device 6 are arranged between the two liquid filling tanks 2 and the two oil tanks 1, the input end of the liquid filling tank oil supplementing device 5 is communicated with the two parallel oil tanks 1, the output end of the liquid filling tank oil supplementing device 5 is communicated with the two parallel liquid filling tanks 2, the input end of the liquid filling tank oil discharging device 6 is communicated with the two parallel liquid filling tanks 2, and the output end of the liquid filling tank oil supplementing device 5 is communicated with the two parallel oil tanks 1.
During actual use, when the movable beam 7 of the die forging press descends rapidly, the eight liquid filling valves 3 are all opened, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8 of the die forging press, and oil liquid of the four low-pressure compensators 4 directly and rapidly enters the eight main working plunger cylinders 8. The four low-pressure compensators 4 are communicated with the two large liquid filling tanks 2, and the liquid filling tanks 2 can supplement the shortage of the oil quantity of the compensators 4, thereby meeting the requirement of filling the eight main working plunger cylinders 8 when the movable beam 7 descends rapidly. The four low-pressure compensators 4 are connected by hydraulic pipelines, so that the liquid level balance is ensured, and the liquid filling speeds of the eight main working plunger cylinders 8 are ensured to be consistent.
When the die forging press performs pressurization work, the eight liquid filling valves 3 are closed, and high-pressure oil enters the main working plunger cylinder 8 through a high-pressure pipeline to complete die forging of the forge piece.
When the movable beam 7 rapidly ascends, the eight liquid filling valves 3 are all opened, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8 of the die forging press again, and oil in the eight main working plunger cylinders 8 is rapidly pressed back into the low-pressure compensators 4 due to the ascending of the movable beam. Because the low-pressure compensator 4 is communicated with the two large-scale liquid filling tanks 2, redundant oil in the low-pressure compensator 4 can return to the liquid filling tanks 2, and therefore the moving beam 7 can rise quickly. And the four low-pressure compensators 4 are also connected by hydraulic pipelines, so that the liquid level balance is ensured, and the liquid discharge speed of the eight main working plunger cylinders is ensured to be consistent.
In the process of rapid descending and rapid ascending of the moving beam 7 of the die forging press, a liquid filling tank oil supplementing device 5 and a liquid filling tank oil discharging device 6 are arranged between the two liquid filling tanks 2 and the two oil tanks 1, so that the two liquid filling tanks 2 can be always in normal liquid level.
The invention can lead the eight main working plunger cylinders 8 of the upgraded 300MN die forging press to carry out quick liquid charging and discharging when the movable beam 7 moves quickly, thereby effectively improving the operation speed and the stability of the 300MN die forging press.
Example two:
referring to the fast liquid filling system of the multiple main working plunger cylinders of the large die forging press for changing water into oil shown in fig. 1, on the basis of the first embodiment, the volumes of the two liquid filling tanks 2 are both 35m3～40m3。
During actual use, when the press unloads, returns and loads, the liquid level of the liquid filling tank 2 is always in a high-level state under the combined action of the liquid filling tank oil supplementing device 5 and the liquid filling tank oil discharging device 6, and when the idle stroke of the press descends, the liquid filling tank 2 supplements oil for the low-pressure compensator 4 in time to prevent air suction. The volumes of the two liquid charging tanks 2 can be 37m3To meet the oil replenishment requirement of the low pressure compensator 4.
Example three:
referring to a water-to-oil large die forging press multi-main working plunger cylinder quick liquid filling system shown in fig. 1, on the basis of the first embodiment: the hydraulic pipeline is a telescopic pipeline.
In actual use, the hydraulic pipeline adopts a telescopic pipeline, so that the hydraulic pipeline can better adapt to elastic deformation of the die forging press during working.
Example four:
referring to a water-to-oil large die forging press multi-main working plunger cylinder quick liquid filling system shown in fig. 1, on the basis of the first embodiment: the four low-pressure compensators 4 are arranged at a height higher than the height of the eight charging valves 3.
When in actual use, the four low-pressure compensators 4 adopt the technical scheme that the positions of the low-pressure compensators 4 are higher than the liquid filling valve 3, and when the idle stroke of the press descends, liquid can be quickly and stably supplemented to the main working plunger cylinder 8.
Example five:
referring to a quick liquid charging system of a multi-main working plunger cylinder of a water-to-oil large die forging press shown in fig. 1, on the basis of the first embodiment: the device also comprises a PLC controller; and the PLC is respectively connected with eight main working plunger cylinders 8 through electric signals.
In actual use, the PLC is arranged, so that the eight main working plunger cylinders 8 can be automatically opened and closed under the control of the PLC, and the automation degree is improved.
Example six:
referring to a water-to-oil large die forging press multi-main working plunger cylinder quick liquid filling system shown in fig. 1, on the basis of the first embodiment: the oil supplementing device 5 of the liquid filling tank comprises a screw pump, a filter and a one-way valve; the oil suction port of the screw pump is connected with the oil tank 1, the outlet of the screw pump is connected with the inlet of the filter, the outlet of the filter is connected with the inlet of the one-way valve, and the outlet of the one-way valve is connected with the liquid charging tank 2.
In actual use, if the liquid level of the liquid filling tank 2 is lower than a set liquid level, the screw pump is started, oil is absorbed from the oil tank 1 and is supplemented to the liquid filling tank 2 through the filter and the one-way valve, and the screw pump stops after the liquid level of the liquid filling tank 2 reaches the set value.
Example seven:
referring to a quick liquid charging system of a multi-main working plunger cylinder of a water-to-oil large die forging press shown in fig. 1, on the basis of the first embodiment: the oil filling tank oil discharging device 6 comprises an electromagnetic oil discharging valve and an overflow valve; the electromagnetic oil drain valve and the overflow valve are connected in parallel, the inlets of the electromagnetic oil drain valve and the overflow valve are both connected with the liquid filling tank 2, and the outlets of the electromagnetic oil drain valve and the overflow valve are both connected with the oil tank 1.
In actual use, if the liquid level of the liquid filling tank 2 is higher than the set liquid level, the electromagnetic oil drain valve is electrified and opened, and the liquid filling tank 2 drains oil to the oil tank 1 through the electromagnetic oil drain valve. And after the liquid level of the liquid filling tank 2 rises to cause the pressure to rise and exceed the set pressure of the overflow valve under the unexpected condition, the overflow valve is opened, and the liquid filling tank 2 discharges oil to the oil tank 1 through the overflow valve, so that the safe operation of the liquid filling tank 2 is ensured.
Example eight:
the fast liquid flushing method for the fast liquid filling system of the multi-main working plunger cylinder of the large die forging press for changing water into oil comprises the following steps,
the method comprises the following steps: when the moving beam 7 of the die forging press descends rapidly, the second step is carried out; when the die forging press performs pressurization work, entering the step three; when the movable beam 7 rapidly ascends, the fourth step is carried out:
step two: the PLC controller controls the eight liquid filling valves 3 to be opened completely, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8, and oil liquid of the four low-pressure compensators 4 directly and quickly enters the eight main working plunger cylinders 8; completing the rapid descent of the mobile beam 7;
step three: the PLC controller controls the eight liquid filling valves 3 to be closed, and high-pressure oil enters the eight main working plunger cylinders 8 through pipelines to complete die forging of the forge piece;
step four: the PLC controller controls the eight liquid filling valves 3 to be opened completely, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8 again, and oil in the eight main working plunger cylinders 8 is quickly pressed back into the low-pressure compensators 4 due to the movable cross beam 7, so that the quick rising of the movable cross beam 7 is completed.
When the hydraulic forging press is in practical use, when the movable cross beam 7 of the forging press descends rapidly, the eight liquid filling valves 3 are all opened under the control of the PLC, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8 of the forging press, and oil liquid of the four low-pressure compensators 4 directly and rapidly enters the eight main working plunger cylinders 8. The four low-pressure compensators 4 are communicated with the two liquid filling tanks 2, and the liquid filling tanks 2 can supplement the shortage of the oil quantity of the low-pressure compensators 4, thereby meeting the requirement of filling the eight main working plunger cylinders 8 when the movable beam 7 descends rapidly. The four low-pressure compensators 4 are connected by hydraulic pipelines, so that the liquid level balance is ensured, and the liquid filling speeds of the eight main working plunger cylinders 8 are ensured to be consistent.
When the die forging press performs pressurization work, the eight liquid filling valves 3 are closed, and high-pressure oil enters the main working plunger cylinder 8 through a high-pressure pipeline to complete die forging of the forge piece.
When the movable beam 7 rises quickly, the eight liquid filling valves 3 are all opened, the four low-pressure compensators 4 are directly communicated with the eight main working plunger cylinders 8 of the die forging press again, and oil in the eight main working plunger cylinders 8 is quickly pressed back into the low-pressure compensators 4 due to the rising of the movable beam 7. Because the low pressure compensator 4 is communicated with the two liquid filling tanks 2, redundant oil in the low pressure compensator 4 can return to the liquid filling tanks 2, and therefore the moving beam 7 can rise quickly. And the four low-pressure compensators 4 are also connected by hydraulic pipelines, so that the liquid level balance is ensured, and the liquid discharge speed of the eight main working plunger cylinders 8 is ensured to be consistent.
In the process of rapid descending and rapid ascending of the movable beam 7 of the die forging press, a liquid filling tank oil supplementing device 5 and a liquid filling tank oil discharging device 6 are arranged between the two large liquid filling tanks 2 and the two oil tanks 1, so that the two liquid filling tanks 2 can be always in normal liquid level.
By using the invention, eight main working oil cylinders of the upgraded 300MN die forging press are quickly charged and discharged when the movable beam moves quickly, so that the operation speed and the stability of the press are improved.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.

Claims (8)

1. The quick liquid filling system for the multiple main working plunger cylinders of the large die forging press for changing water into oil at least comprises two liquid filling tanks (2) and eight main working plunger cylinders (8); the method is characterized in that: the oil-filling system also comprises two oil tanks (1), eight liquid-filling valves (3), four low-pressure compensators (4), a liquid-filling tank oil-supplementing device (5) and a liquid-filling tank oil-discharging device (6); the upper ports of the eight main working plunger cylinders (8) are respectively provided with a liquid charging valve (3); the four low-pressure compensators (4) are fixed on an upper platform of the die forging press, and the four low-pressure compensators (4) are communicated through hydraulic pipelines; every two liquid charging valves (3) in the eight liquid charging valves (3) are respectively and fixedly connected with a low-pressure compensator (4) through hydraulic pipelines; the two liquid filling tanks (2) are placed in pits on the edge of the die forging press and are respectively connected with four low-pressure compensators (4) positioned on the upper part of the die forging press through hydraulic pipelines; the oil-filling device is characterized in that the two oil filling tanks (2) and the two oil tanks (1) are respectively arranged in parallel, an oil filling tank oil supplementing device (5) and an oil filling tank oil discharging device (6) are arranged between the two oil filling tanks (2) and the two oil tanks (1), the input end of the oil filling tank oil supplementing device (5) is communicated with the two oil tanks (1) which are connected in parallel, the output end of the oil filling tank oil supplementing device (5) is communicated with the two liquid filling tanks (2) which are connected in parallel, the input end of the oil filling tank oil discharging device (6) is communicated with the two liquid filling tanks (2) which are connected in parallel, and the output end of the oil filling tank oil supplementing device (5) is communicated with the two oil.
2. The system of claim 1, wherein the system comprises: the volumes of the two liquid filling tanks (2) are both 35m3～40m3。
3. The system of claim 1, wherein the system comprises: the hydraulic pipeline is a telescopic pipeline.
4. The system of claim 1, wherein the system comprises: the four low-pressure compensators (4) are arranged at a height higher than the height of the eight liquid filling valves (3).
5. The system of claim 1, wherein the system comprises: the device also comprises a PLC controller; the PLC is respectively connected with the eight main working plunger cylinders (8) through electric signals.
6. The system of claim 1, wherein the system comprises: the oil supplementing device (5) of the liquid filling tank comprises a screw pump, a filter and a one-way valve; the oil suction port of the screw pump is connected with the oil tank (1), the outlet of the screw pump is connected with the inlet of the filter, the outlet of the filter is connected with the inlet of the one-way valve, and the outlet of the one-way valve is connected with the liquid filling tank (2).
7. The system of claim 1, wherein the system comprises: the oil discharge device (6) of the liquid filling tank comprises an electromagnetic oil drain valve and an overflow valve; the electromagnetic oil drain valve is connected with the overflow valve in parallel, the inlets of the electromagnetic oil drain valve and the overflow valve are both connected with the liquid filling tank (2), and the outlets of the electromagnetic oil drain valve and the overflow valve are both connected with the oil tank (1).
8. The rapid flushing method of the rapid liquid charging system of the multi-main working plunger cylinder of the water-to-oil large die forging press according to any one of claims 1 to 7, characterized in that: comprises the following steps of (a) carrying out,
the method comprises the following steps: when the moving beam (7) of the die forging press descends rapidly, the second step is carried out; when the die forging press performs pressurization work, entering the step three; when the movable beam (7) rapidly ascends, the step four is carried out:
step two: the PLC controller controls the eight liquid filling valves (3) to be opened completely, the four low-pressure compensators (4) are directly communicated with the eight main working plunger cylinders (8), and oil liquid of the four low-pressure compensators (4) directly and quickly enters the eight main working plunger cylinders (8); completing the rapid descending of the movable beam (7);
step three: the PLC controller controls the eight liquid filling valves (3) to be closed, and high-pressure oil enters the eight main working plunger cylinders (8) through pipelines to complete die forging of the forge piece;
step four: the PLC controls the eight liquid filling valves (3) to be opened completely, the four low-pressure compensators (4) are directly communicated with the eight main working plunger cylinders (8) again, and oil in the eight main working plunger cylinders (8) is quickly pressed back into the low-pressure compensators (4) due to the movable cross beam (7), so that the movable cross beam (7) is quickly lifted.
CN202011207320.6A 2020-11-03 2020-11-03 Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil Pending CN112268027A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114472781A (en) * 2022-01-27 2022-05-13 天津市天锻压力机有限公司 Liquid filling system for free forging press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114472781A (en) * 2022-01-27 2022-05-13 天津市天锻压力机有限公司 Liquid filling system for free forging press

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