CN108638568B - Energy-saving hydraulic cushion control system for hydraulic machine - Google Patents

Energy-saving hydraulic cushion control system for hydraulic machine Download PDF

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Publication number
CN108638568B
CN108638568B CN201810379615.8A CN201810379615A CN108638568B CN 108638568 B CN108638568 B CN 108638568B CN 201810379615 A CN201810379615 A CN 201810379615A CN 108638568 B CN108638568 B CN 108638568B
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China
Prior art keywords
hydraulic cushion
hydraulic
energy
control valve
energy accumulator
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CN201810379615.8A
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CN108638568A (en
Inventor
黄伟光
王强
肖鑫
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Tianjin Tianduan Press Co Ltd
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Tianjin Tianduan Press Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16Control arrangements for fluid-driven presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Abstract

The invention discloses an energy-saving hydraulic cushion control system for a hydraulic machine, which belongs to the technical field of hydraulic machines and comprises: the hydraulic cushion lifting device comprises a hydraulic cushion cylinder, a liquid charging valve, a hydraulic cushion control valve block, a pressure sensor, an energy accumulator safety valve group, a hydraulic cushion jacking pump group and a power oil tank; the hydraulic cushion control valve block is positioned above the power oil tank, the hydraulic cushion control valve block is connected with the hydraulic cushion cylinder and the energy accumulator through an oil pipe, the hydraulic cushion passively descends along with the sliding block, oil liquid in the hydraulic cushion cylinder is discharged into the hydraulic cushion control valve block through the liquid charging valve and then discharged into the energy accumulator through a pipeline, and the oil liquid in the energy accumulator reaches the hydraulic cushion cylinder through the hydraulic cushion control valve block during jacking to drive the hydraulic cushion to jack up. The hydraulic cushion control system adopts the principle that the energy accumulator is additionally arranged on the basis of the traditional hydraulic cushion control system to store stretching energy, and the hydraulic cushion is jacked back to the stretching position by utilizing the stored energy when needing jacking, so that the system heating is reduced, the large-displacement hydraulic cushion pump set is saved, and the heating reduction and energy saving results are realized.

Description

Energy-saving hydraulic cushion control system for hydraulic machine
Technical Field
The invention belongs to the technical field of hydraulic presses, and particularly relates to an energy-saving hydraulic cushion control system for a hydraulic press.
Background
The hydraulic machine is widely applied in the automobile stamping process, the environmental protection is the subject of industrial development in the 21 st century, the design technology of the hydraulic machine is improved, on one hand, the production efficiency is improved, and on the other hand, the energy conservation and the cost reduction are required.
The traditional hydraulic press hydraulic cushion control system operates according to a conventional stretching and pressing process, in the stretching process, a large amount of high-pressure oil is discharged into an oil tank through an overflow valve when a hydraulic cushion descends along with a sliding block, and then the hydraulic cushion is jacked up through a hydraulic cushion pump to wait for the next process cycle operation. Two problems are caused, namely, a large amount of energy is generated when a large amount of high-pressure oil is discharged into the oil tank through the overflow valve, and the conventional hydraulic cushion system does not utilize the energy but completely converts the energy into heat; secondly, the ram hydraulic press generally requires that the jacking speed of the hydraulic cushion is higher, and a large-displacement pump set is required to be configured for jacking.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the patent provides an energy-saving hydraulic cushion control system for a hydraulic machine, which utilizes an energy accumulator to store energy generated in the stretching process and release the energy in the jacking process of a hydraulic cushion, so that the heating of the system is reduced, the power and the discharge capacity of a jacking pump set of the hydraulic cushion can be reduced, and the cost is reduced.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
an energy-saving hydraulic cushion control system for a hydraulic machine, comprising at least: the hydraulic cushion lifting device comprises a hydraulic cushion cylinder (1), a liquid charging valve (2), a hydraulic cushion control valve block (3), a pressure sensor (4), an energy accumulator (5), an energy accumulator safety valve group (6), a hydraulic cushion jacking pump group (7) and a power oil tank (8); wherein:
the hydraulic cushion control valve block (3) is located above the power oil tank (8), the hydraulic cushion control valve block (3) is connected with the hydraulic cushion cylinder (1) and the energy accumulator (5) through an oil pipe, the hydraulic cushion passively descends along with the sliding block, oil liquid in the hydraulic cushion cylinder (1) is discharged into the hydraulic cushion control valve block (3) through the liquid charging valve (2) and then discharged into the energy accumulator (5) through a pipeline, and the oil liquid in the energy accumulator (5) reaches the hydraulic cushion cylinder (1) through the hydraulic cushion control valve block (3) during jacking to drive the hydraulic cushion to jack up.
The invention has the advantages and positive effects that:
by adopting the technical scheme, the hydraulic cushion control system adopts the principle that the energy accumulator is additionally arranged on the basis of the traditional hydraulic cushion control system to store stretching energy, and the hydraulic cushion is jacked back to the stretching position by utilizing the stored energy when needing jacking, so that the system heating is reduced, a large-displacement hydraulic cushion pump set is saved, and the effects of reducing heating, saving energy and reducing cost are realized. The attached drawings of the specification:
FIG. 1 is a block diagram of a preferred embodiment of this patent;
wherein: 1. a hydraulic cushion cylinder; 2. a liquid charging valve; 3. a hydraulic cushion control valve block; 4. a pressure sensor; 5. an accumulator; 6. an accumulator safety valve bank; 7. the hydraulic cushion jacks up the pump set; 8. and a power oil tank.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following examples are illustrated, and the following detailed descriptions are given:
referring to fig. 1, an energy-saving hydraulic cushion control system for a hydraulic machine includes:
the hydraulic cushion lifting device comprises a hydraulic cushion cylinder 1, a liquid charging valve 2, a hydraulic cushion control valve block 3, a pressure sensor 4, an energy accumulator 5, an energy accumulator safety valve group 6, a hydraulic cushion jacking pump group 7 and a power oil tank 8.
Wherein: the hydraulic cushion passively descends along with the sliding block, oil liquid in the hydraulic cushion cylinder 1 is discharged into the hydraulic cushion control valve block 3 through the liquid charging valve 2 and then discharged into the energy accumulator 5 through a pipeline, the oil liquid in the energy accumulator 5 reaches the hydraulic cushion cylinder 1 through the hydraulic cushion control valve block 3 during jacking, and the hydraulic cushion is driven to jack up, so that the purposes of saving energy and reducing cost of the hydraulic press are finally achieved.
The technical scheme mainly comprises a power oil tank of the hydraulic system, a hydraulic cushion jacking pump set, a hydraulic cushion control valve block, an energy accumulator, hydraulic pipelines for connecting all parts and the like.
Hydraulic cushion control valve block 3 is placed in 8 tops of power oil tank, hydraulic cushion control valve block 3 passes through oil pipe connection hydraulic cushion jar 1 and energy storage ware 5, hydraulic oil in the hydraulic cushion jar 1 is discharged into energy storage ware 5 through hydraulic cushion control valve block 3, store energy among the energy storage ware, the energy that utilizes the energy storage ware when needs jack-up jacks up the hydraulic cushion, the fluid of the energy storage ware of going into in theory just in time can push back the hydraulic cushion to tensile position, use for the first time or take place the fluid leakage condition and utilize little discharge capacity hydraulic cushion jack-up pump package to realize for the energy storage ware pressure supplementation can, thereby realize reducing and generate heat, energy-conserving purpose.
The working conditions of the technical scheme are as follows:
in the stretching process of the hydraulic press, a hydraulic cushion descends along with a sliding block, oil in a hydraulic cushion cylinder 1 is discharged into a hydraulic cushion control valve block 3 through a pipeline, the hydraulic cushion control valve block is discharged into an energy accumulator 5 after being subjected to pressure regulation through a proportional valve, after the stretching action is completed, an electromagnetic directional valve YA50 is electrified under the control of an electrical program, the oil in the energy accumulator 5 is discharged into the hydraulic cushion cylinder 1 through an oil pipe and the hydraulic cushion control valve block 3, the hydraulic cushion is jacked to the stretching position, and the process action is completed circularly. When the hydraulic pressure accumulator is used for the first time or the system has leakage, the pressure sensor 4 sends a signal, the magnetic reversing valve YA51 is electrified under the control of an electric program, the hydraulic cushion jacks the pump set 7 to supplement oil for the energy accumulator 5, and after the oil supplement pressure is reached, the pressure sensor 4 sends a signal to complete the pressure supplement action. Theoretically, the energy stored by the energy accumulator can just jack the hydraulic cushion back to the stretching position, and after the hydraulic cushion is used for the first time, the pressure of the energy accumulator does not need to be supplemented. According to actual detection, the scheme can reduce the heat productivity of the hydraulic press in the stretching process by more than 1/3, simultaneously save the cost of jacking the pump group by 80% by the hydraulic cushion, reduce the equipment power and be widely used for conventional hydraulic presses.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (1)

1. An energy-saving hydraulic cushion control system for a hydraulic machine, characterized by: at least comprises the following steps: the hydraulic cushion lifting device comprises a hydraulic cushion cylinder (1), a liquid charging valve (2), a hydraulic cushion control valve block (3), a pressure sensor (4), an energy accumulator (5), an energy accumulator safety valve group (6), a hydraulic cushion jacking pump group (7) and a power oil tank (8); wherein:
the hydraulic cushion control valve block (3) is positioned above the power oil tank (8), the hydraulic cushion control valve block (3) is connected with the hydraulic cushion cylinder (1) and the energy accumulator (5) through an oil pipe, the hydraulic cushion passively descends along with the sliding block, oil liquid in the hydraulic cushion cylinder (1) is discharged into the hydraulic cushion control valve block (3) through the liquid charging valve (2) and then discharged into the energy accumulator (5) through a pipeline, and when the hydraulic cushion control valve block is jacked, the oil liquid in the energy accumulator (5) reaches the hydraulic cushion cylinder (1) through the hydraulic cushion control valve block (3) to drive the hydraulic cushion to jack;
the energy accumulator safety valve group (6) is connected with the magnetic reversing valve YA51 through an oil liquid pipeline provided with a pressure sensor (4), and the hydraulic cushion jacking pump group (7) is respectively connected with the magnetic reversing valve YA51 and the electromagnetic reversing valve YA50 through the oil liquid pipeline;
the working process of the energy-saving hydraulic cushion control system for the hydraulic machine is as follows:
in the stretching process of the hydraulic press, a hydraulic cushion descends along with a sliding block, oil in a hydraulic cushion cylinder is discharged into a hydraulic cushion control valve block through a pipeline, the hydraulic cushion control valve block is discharged into an energy accumulator after being subjected to pressure regulation through a proportional valve, after the stretching action is finished, an electromagnetic directional valve YA50 is electrified under the control of an electrical program, the oil in the energy accumulator is discharged into the hydraulic cushion cylinder through an oil pipe and the hydraulic cushion control valve block, so that the hydraulic cushion is jacked to the stretching position, and the process action is completed circularly; when the hydraulic pressure compensation device is used for the first time or the system has leakage, the pressure sensor sends a signal, the magnetic reversing valve YA51 is electrified under the control of an electric program, the hydraulic cushion jacks a pump set to supplement oil for the energy accumulator, and after the oil supplement pressure is reached, the pressure sensor sends a signal and the pressure supplement action is completed.
CN201810379615.8A 2018-04-25 2018-04-25 Energy-saving hydraulic cushion control system for hydraulic machine Active CN108638568B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810379615.8A CN108638568B (en) 2018-04-25 2018-04-25 Energy-saving hydraulic cushion control system for hydraulic machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810379615.8A CN108638568B (en) 2018-04-25 2018-04-25 Energy-saving hydraulic cushion control system for hydraulic machine

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CN108638568B true CN108638568B (en) 2021-06-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111805962B (en) * 2020-07-08 2021-11-30 天津市天锻压力机有限公司 Control system and control method for special servo hydraulic cushion of hydraulic machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19809746A1 (en) * 1998-03-06 1999-09-16 Benteler Werke Ag Device for the hydraulic forming of hollow metal bodies
KR20010021378A (en) * 1999-08-24 2001-03-15 구마모토 마사히로 Hydraulic system for tire curing press
CN200977735Y (en) * 2006-11-29 2007-11-21 天津市天锻压力机有限公司 Hydraulic control system for energy-saving drawing hydraulic press
CN201613663U (en) * 2009-11-19 2010-10-27 天津市天锻压力机有限公司 Four-corner pressure regulation device for lower hydraulic cushion of hydraulic machine
CN201665025U (en) * 2010-04-09 2010-12-08 江苏国力锻压机床有限公司 Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press
CN102363375A (en) * 2011-06-30 2012-02-29 天津市天锻压力机有限公司 Fast energy-saving single-action hydraulic machine
CN106393767A (en) * 2016-02-19 2017-02-15 王继国 Energy-saving hydraulic press
CN107420071A (en) * 2017-08-04 2017-12-01 福建双环能源科技股份有限公司 A kind of hydraulic pumping unit energy conserving system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19809746A1 (en) * 1998-03-06 1999-09-16 Benteler Werke Ag Device for the hydraulic forming of hollow metal bodies
KR20010021378A (en) * 1999-08-24 2001-03-15 구마모토 마사히로 Hydraulic system for tire curing press
CN200977735Y (en) * 2006-11-29 2007-11-21 天津市天锻压力机有限公司 Hydraulic control system for energy-saving drawing hydraulic press
CN201613663U (en) * 2009-11-19 2010-10-27 天津市天锻压力机有限公司 Four-corner pressure regulation device for lower hydraulic cushion of hydraulic machine
CN201665025U (en) * 2010-04-09 2010-12-08 江苏国力锻压机床有限公司 Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press
CN102363375A (en) * 2011-06-30 2012-02-29 天津市天锻压力机有限公司 Fast energy-saving single-action hydraulic machine
CN106393767A (en) * 2016-02-19 2017-02-15 王继国 Energy-saving hydraulic press
CN107420071A (en) * 2017-08-04 2017-12-01 福建双环能源科技股份有限公司 A kind of hydraulic pumping unit energy conserving system

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