CN115263850B - Multistage electrohydraulic servo cylinder - Google Patents
Multistage electrohydraulic servo cylinder Download PDFInfo
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- CN115263850B CN115263850B CN202210733163.5A CN202210733163A CN115263850B CN 115263850 B CN115263850 B CN 115263850B CN 202210733163 A CN202210733163 A CN 202210733163A CN 115263850 B CN115263850 B CN 115263850B
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- 238000000034 method Methods 0.000 claims abstract description 43
- 230000008569 process Effects 0.000 claims abstract description 40
- 239000003921 oil Substances 0.000 claims description 163
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 19
- 230000001502 supplementing effect Effects 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a multistage electrohydraulic servo cylinder, which comprises a multistage hydraulic cylinder, an oil storage device and an oil way system, wherein the multistage hydraulic cylinder comprises a cylinder barrel, a piston rod sliding in the cylinder barrel and a built-in piston rod sliding in the piston rod, wherein a front cover and a connecting flange are respectively packaged at two ends of the cylinder barrel, a multistage driving cavity is formed between the piston rod and the cylinder barrel, the multistage driving cavity comprises a return cavity between the front cover and the piston rod and a working cavity between the piston rod and the connecting flange, and a process cavity is formed between the built-in piston rod and the piston rod; the oil storage device comprises an oil storage cavity which is respectively communicated with the return cavity, the working cavity and the process cavity through an oil circuit system; the oil way system comprises an oil pump driven by a servo motor, and the oil pump is communicated with the oil storage cavity, the return cavity, the working cavity and the process cavity through an oil way distributor. The multistage electrohydraulic servo cylinder is simple in structure, and simultaneously provided with the process cavity, the working cavity, the return cavity and the oil storage cavity, so that high-speed process and return and low-speed high-pressure work are realized.
Description
Technical Field
The invention relates to the field of automatic machinery, in particular to a multistage electrohydraulic servo cylinder.
Background
The fluid transmission and control technology has become an important sign of the state of industry, hydraulic cylinders are widely applied to hydraulic equipment such as hydraulic presses, bending machines and riveting machines, and electro-hydraulic servo products are formed along with the development of servo motor technology, such as: the traditional hydraulic station is connected with the hydraulic cylinder, wherein the hydraulic station is provided with a common driving motor, is simply updated by adopting servo driving, is still the same as that before transformation, and does not bring the effects of performance improvement, energy consumption reduction and the like; and the following steps: the system for performing closed-loop feedback control by utilizing the servo motor to drive the oil pump and providing the pressure sensor is based on energy-saving transformation of the traditional hydraulic system, can save energy by about 30%, but can not realize independent system, and the traditional oil tank and the like are still indispensable.
Disclosure of Invention
The invention aims to provide a multistage electrohydraulic servo cylinder so as to overcome the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the embodiment of the invention discloses a multistage electrohydraulic servo cylinder, which comprises:
The multistage hydraulic cylinder is used for outputting a pressure executing element and comprises a cylinder barrel, a piston rod sliding in the cylinder barrel and a built-in piston rod sliding in the piston rod, wherein a front cover and a connecting flange are respectively packaged at two ends of the cylinder barrel, a multistage driving cavity is formed between the piston rod and the cylinder barrel, the multistage driving cavity comprises a return cavity between the front cover and the piston rod and a working cavity between the piston rod and the connecting flange, and a process cavity is formed between the built-in piston rod and the piston rod;
The oil storage device is used for supplementing oil and returning oil of the multi-stage hydraulic cylinder and comprises an oil storage cavity, wherein the oil storage cavity is communicated with the working cavity through a liquid filling valve, and the oil storage cavity is respectively communicated with the return cavity, the working cavity and the process cavity through an oil circuit system;
the oil circuit system is used for driving hydraulic oil to flow and controlling the trend of the hydraulic oil and comprises an oil pump driven by a servo motor, and the oil pump is respectively communicated with the oil storage cavity, the return cavity, the working cavity and the process cavity through an oil circuit distributor.
Further, in the multistage electro-hydraulic servo cylinder, two sides of the liquid filling valve are respectively fixed on the multistage hydraulic cylinder and the oil storage device through the front valve cover and the rear valve cover.
Further, in the multistage electrohydraulic servo cylinder, the oil storage device comprises an oil storage cylinder barrel and an isolation piston sliding in the oil storage cylinder barrel, wherein one end of the oil storage cylinder barrel is fixed on a rear valve cover in a sealing mode, a rear cover is arranged at the other end of the oil storage cylinder barrel in a sealing mode, an oil storage cavity is formed between the isolation piston and the rear valve cover, a constant-pressure cavity is formed between the isolation piston and the rear cover, an air inlet hole and an air outlet hole which are communicated with the constant-pressure cavity are formed in the rear cover, the air inlet hole is communicated with external compressed air, and the air outlet hole is communicated with the outside through a pressure relief valve.
Further, in the multistage electro-hydraulic servo cylinder, an oil outlet and an oil return hole which are respectively communicated with the oil storage cavity are formed in the rear valve cover.
Further, in the multistage electrohydraulic servo cylinder, one side of the connecting flange protrudes outwards to form a mounting boss, the servo motor is fixed on the mounting boss and is connected with the oil pump through a coupling in a driving mode, and the oil way distributor is fixed on the side face, adjacent to the mounting boss, of the connecting flange.
Further, in the multistage electro-hydraulic servo cylinder, a second oil inlet and outlet hole communicated with the process cavity, a third oil inlet and outlet hole communicated with the working cavity and an oil supplementing hole communicated with the liquid filling valve are respectively arranged in the connecting flange.
Further, in the multistage electrohydraulic servo cylinder, the front cover is connected to the corresponding end part of the cylinder barrel in a sealing manner through the front cover mounting plate, wherein the front cover mounting plate is connected to the connecting flange through the first bolt, and a third oil inlet and outlet hole communicated with the return cavity is formed in the front cover.
Further, in the multistage electrohydraulic servo cylinder, the oil path distributor comprises a valve plate and a cartridge valve arranged on the valve plate.
Further, in the multistage electrohydraulic servo cylinder, the oil pump is a forward and reverse rotation oil pump.
Further, in the multi-stage electrohydraulic servo cylinder, the oil storage cavity, the process cavity, the return cavity and the working cavity are all provided with oil injection and exhaust group holes.
Compared with the prior art, the invention has the advantages that: the multistage electrohydraulic servo cylinder is simple in structure, and meanwhile, a process cavity, a working cavity and a return cavity are arranged, so that high-speed process, return and low-speed high-pressure work are realized, an oil storage device is provided with an oil storage cavity and is used for supplementing oil and returning oil of the multistage hydraulic cylinder, the multistage electrohydraulic servo cylinder is convenient to integrally install, 360-degree installation of the cylinder is realized, the application range is enlarged, the pressure output of the same tonnage is greatly reduced, the power of a servo motor is greatly reduced, the cost input is reduced, the oil pump capable of positively and negatively rotating is matched, the internal circulation of hydraulic oil is realized, the oxidation phenomenon is avoided, and the energy consumption is reduced by 70%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a multistage electro-hydraulic servo cylinder in accordance with an embodiment of the present invention.
FIG. 2 is an exploded view of a multi-stage electro-hydraulic servo cylinder in accordance with one embodiment of the present invention.
FIG. 3 is a schematic control diagram of a multistage electro-hydraulic servo cylinder in accordance with an embodiment of the present invention.
Fig. 4 is a schematic structural view of a rear valve cover according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a connecting flange according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a front cover according to an embodiment of the invention.
Detailed Description
The following detailed description of the technical solutions according to the embodiments of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 6, a multistage electro-hydraulic servo cylinder includes:
the multistage hydraulic cylinder 1 is used for outputting a pressure and comprises a cylinder barrel 11, a piston rod 12 sliding in the cylinder barrel 11 and a built-in piston rod 13 sliding in the piston rod 12, wherein a front cover 14 and a connecting flange 15 are respectively packaged at two ends of the cylinder barrel 11, a multistage driving cavity is formed between the piston rod 12 and the cylinder barrel 11, a return cavity between the front cover 14 and the piston rod 12 and a working cavity between the piston rod 12 and the connecting flange 15 are respectively formed, and a process cavity is formed between the built-in piston rod 13 and the piston rod 12;
The oil storage device 2 is used for supplementing oil and returning oil of the multi-stage hydraulic cylinder and comprises an oil storage cavity, wherein the oil storage cavity is communicated with the working cavity through a liquid filling valve 21, and the oil storage cavity is respectively communicated with the return cavity, the working cavity and the process cavity through an oil circuit system;
The oil path system 3 is used for driving hydraulic oil to flow and controlling the trend of the hydraulic oil, and comprises an oil pump 32 driven by a servo motor 31, wherein the oil pump 32 is respectively communicated with the oil storage cavity, the return cavity, the working cavity and the process cavity through an oil path distributor 33.
In the technical scheme, the piston part of the piston rod is provided with a sealing ring, a guide ring and other conventional structures, the sealing slide is arranged on the inner wall of a cylinder barrel, a multi-stage driving cavity is divided into a return cavity (a rod cavity) and a working cavity (a rodless cavity), a blind hole is arranged in the center of one side end face of the piston rod, which is close to the piston part of the piston rod, the end part of the blind hole is fixedly provided with a sealing piston 121, the built-in piston rod slides to penetrate through the sealing piston and extends into the blind hole, a process cavity is formed between the built-in piston rod and the inner wall of the blind hole, one end of the built-in piston rod, which is close to a connecting flange, is concavely provided with a mounting groove and is fixedly arranged on the connecting flange through a clamping plate 131, the inner wall of the sealing piston is provided with a sealing ring, and the outer wall of the built-in piston rod forms sliding seal, during the use, hydraulic oil is firstly pumped into the process cavity to push the working piston to rapidly move, and the cross section area of the process cavity is larger than that of the return cavity, the hydraulic oil in the return chamber is reversely pumped by the pump and is merged into the process chamber, the insufficient part is complemented by the oil storage device, in the process, the pressure in the working chamber is smaller than the pressure in the oil storage chamber, the liquid filling valve is opened, the hydraulic oil is replenished into the working chamber, the piston rod moves to a set working position (set by a proximity sensor or a time delay and other conventional modes), high-pressure oil is pumped into the working chamber at the same time, the piston rod is pushed, the liquid filling valve is forced to be closed, the large-tonnage pressure output is realized, the servo motor drives the oil pump to reversely rotate after the corresponding pressure output is completed, the hydraulic oil is pumped into the return chamber, the hydraulic oil in the process chamber is reversely pumped into the return chamber and the oil storage chamber, the guide pressure inlet of the liquid filling valve is also filled with the hydraulic oil, the liquid filling valve is forced to be opened, the hydraulic oil in the working chamber is extruded into the oil storage chamber, the multi-stage electro-hydraulic servo cylinder has simple structure, the process cavity, the working cavity and the return cavity are arranged simultaneously, the high-speed process and the return of the piston rod and the low-speed high-pressure work are realized, the oil storage device is provided with an oil storage cavity, and is used for supplementing oil and returning oil of a multi-stage hydraulic cylinder, the structure is compact, the whole installation is convenient, the 360-degree installation of the cylinder is realized, the application range is enlarged, the pressure output of the same tonnage is greatly reduced, the power of a servo motor is greatly reduced, the cost input is reduced, the internal circulation of hydraulic oil is realized, the oxidation phenomenon is avoided, and the energy consumption is reduced by 70%.
As shown in fig. 1 to 3, for example, both sides of the charge valve 21 are fixed to the multi-stage hydraulic cylinder and the oil reservoir by a front valve cover 211 and a rear valve cover 212, respectively.
According to the technical scheme, the liquid filling valve is of a structure recorded in the prior art, space occupation is reduced through the fact that the front valve cover and the rear valve cover are arranged between the multi-stage hydraulic cylinder and the oil storage device, integral layout is facilitated, sealing bosses are protruding from the end faces, away from the liquid filling valve, of the front valve cover and the rear valve cover, and sealing connection between the front valve cover, the oil storage cavity and the connecting flange is achieved through the cooperation of devices such as a sealing ring.
As shown in fig. 2 and 3, the oil storage device 2 includes an oil storage cylinder 22 and an isolation piston 23 sliding in the oil storage cylinder 22, wherein one end of the oil storage cylinder 22 is sealed and fixed to a rear valve cover 212, the other end is sealed and fixed with a rear cover 24, an oil storage chamber is formed between the isolation piston 23 and the rear valve cover 212, a constant pressure chamber is formed between the isolation piston 23 and the rear cover 24, an air inlet hole and an air outlet hole are provided in the rear cover 24, which are communicated with the constant pressure chamber, wherein the air inlet hole is communicated with external compressed air, and the air outlet hole is communicated with the outside through a pressure relief valve (not shown).
In this technical scheme, the inlet port is through the compressed air of constant pressure valve etc. intercommunication in outside 6Bar, cooperates the effect of relief valve, guarantees that the constant pressure intracavity remains the pressure of 6Bar all the time, and the hydraulic oil in the oil storage intracavity remains the pressure of 6Bar all the time to make working chamber, process chamber and return chamber be in the state of pressing all the time, can realize the installation of 360 arbitrary angles of this jar, wherein, the back lid passes through stud and connects in the back valve gap.
For example, referring to fig. 2 and 4, the rear valve cover 212 is provided therein with an oil outlet hole and an oil return hole respectively communicating with the oil storage chamber.
In the technical scheme, the side surface of the rear valve cover is also provided with a relief groove corresponding to the liquid filling valve, so that the interference of the installation of the liquid filling valve is avoided, and the valve is used for oil supply and oil return of an oil way system.
As shown in fig. 2 and 5, for example, a mounting boss 151 is outwardly protruded from one side of the connection flange 15, a servo motor 31 is fixed to the mounting boss and is drivingly connected to an oil pump 32 through a coupling 33, and an oil path distributor 33 is fixed to a side of the connection flange 15 adjacent to the mounting boss.
In this technical scheme, servo motor and oil pump's mounting means and connection structure all belong to prior art, and the shaft coupling overcoat is equipped with oil pump bell jar 34, integrates servo motor and oil pump to one side of multistage pneumatic cylinder through the installation boss, and oil circuit system is controlled by servo motor's servo control system, provides the power supply for oil circuit system.
As shown in fig. 2 and 5, the connecting flange 15 is provided with a second oil inlet/outlet hole 152 communicating with the process chamber, a third oil inlet/outlet hole 153 communicating with the working chamber, and an oil supplementing hole 154 communicating with the charge valve 21, respectively.
According to the technical scheme, the number of the oil supplementing holes is three, one oil supplementing hole is overlapped with part of the oil channels of the third oil inlet and outlet holes, when the working cavity pumps high-pressure oil, the working cavity acts on the liquid filling valve at the same time to close the liquid filling valve, and the other oil supplementing hole is overlapped with part of the oil channels in the oil filling and exhaust group holes corresponding to the working cavity, so that the liquid filling valve is in a closed state in the oil filling and exhaust process, and the air in the multistage driving cavity is completely exhausted.
As shown in fig. 2 and 6, the front cover 14 is sealingly connected to the corresponding end of the cylinder 11 by a front cover mounting plate 16, wherein the front cover mounting plate 16 is connected to the connecting flange 15 by a first bolt, and a third oil inlet and outlet hole communicating with the return chamber is provided in the front cover 14.
In the technical scheme, eight first bolts are single-head bolts, one end is provided with external threads, the other end is provided with a threaded hole, one end of the external threads penetrates through the connecting flange and the front valve cover and then is connected with the rear valve cover, one end of the threaded hole is fixed on the front cover mounting plate through an external screw, the outer end of the front cover is provided with a step, the front cover is fixed on the corresponding end part of the cylinder barrel through the cooperation of the front cover mounting plate and the step, the front cover and the cylinder barrel are in sealing connection through conventional structures such as a sealing boss, a sealing ring and the like, and sliding sealing is arranged between the front cover and the piston rod.
Illustratively, referring to fig. 1-3, the oil circuit distributor 33 includes a valve plate and a cartridge valve disposed to the valve plate.
According to the technical scheme, the oil duct in the valve plate and the gate valve are arranged according to an oil way control diagram of FIG. 3, when oil is supplied to the process cavity, the servo motor drives the oil pump to rotate positively, the left one-way valve is conducted by hydraulic oil, meanwhile, the left electromagnetic valve is conducted, hydraulic oil in the return cavity is extruded, the lateral pressure of the working cavity is reduced, the liquid filling valve is opened, the hydraulic oil in the oil storage cavity is supplemented into the working cavity, and the piston rod rapidly advances; when the working cavity is used for supplying oil, the right electromagnetic valve is conducted, high-pressure oil is pumped into the working cavity, the liquid filling valve is closed, and large-tonnage pressure is output; after the pressure output is completed, the servo motor drives the oil pump to rotate reversely, the return cavity is filled with oil, the right one-way valve and the liquid filling valve are opened, hydraulic oil in the process cavity flows back to the oil storage cavity and the return cavity, hydraulic oil in the working cavity flows back to the oil storage cavity through the liquid filling valve, the oil way is further connected with the pressure release valve, the safety of the oil way is ensured, the pressure release valve is also arranged on the valve plate in a cartridge valve mode, the whole oil way distributor is integrated, and the oil pump, the oil storage cavity and the like are communicated to the oil way distributor through an oil pipe with a connector.
Illustratively, the oil pump 32 is a counter-rotating oil pump 32.
In the technical proposal, the oil pump can use the structure recorded in the prior art, such as selectingThe PL series positive and negative rotation oil pump of the company realizes the internal circulation of hydraulic oil and avoids the occurrence of oxidation phenomenon.
As shown in fig. 2 to 6, for example, the oil storage chamber, the process chamber, and the return chamber and the working chamber are each provided with an oil injection and exhaust group hole.
In the technical scheme, the return cavity and the working cavity share one exhaust hole, and are respectively provided with the oil filling holes, before use, hydraulic oil is filled into the process cavity, the working cavity, the return cavity and the oil storage cavity through the oil filling and exhausting holes, and air is exhausted, so that adverse conditions such as vibration, tremble and slow crawling are avoided in the use process.
In summary, this multistage electrohydraulic servo cylinder simple structure, process chamber, working chamber and the return stroke chamber that set up simultaneously realize high-speed process and return stroke, and low-speed high pressure work, oil storage device is from taking the oil storage chamber for the oil filling and the return oil of multistage pneumatic cylinder, and convenient integral erection realizes 360 arbitrary angles installations of this jar, enlarges application scope, and the pressure output of same tonnage reduces servo motor's power by a wide margin, reduces the cost input, and the cooperation can just reverse oil pump, realizes the inner loop of hydraulic oil, avoids the emergence of oxidation phenomenon, saves energy consumption by 70%.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely illustrative of the embodiments of this invention and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the invention, and it is intended to cover all modifications and variations as fall within the scope of the invention.
Claims (10)
1. A multi-stage electro-hydraulic servo cylinder comprising:
The multistage hydraulic cylinder is used for outputting a pressure executing element and comprises a cylinder barrel, a piston rod sliding in the cylinder barrel and a built-in piston rod sliding in the piston rod, wherein a front cover and a connecting flange are respectively packaged at two ends of the cylinder barrel;
The oil storage device is used for supplementing oil and returning oil of the multi-stage hydraulic cylinder and comprises an oil storage cavity, wherein the oil storage cavity is communicated with the working cavity through a liquid filling valve, and the oil storage cavity is respectively communicated with the return cavity, the working cavity and the process cavity through an oil circuit system;
the oil circuit system is used for driving hydraulic oil to flow and controlling the trend of the hydraulic oil and comprises an oil pump driven by a servo motor, and the oil pump is respectively communicated with the oil storage cavity, the return cavity, the working cavity and the process cavity through an oil circuit distributor.
2. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: and two sides of the liquid filling valve are respectively fixed on the multistage hydraulic cylinder and the oil storage device through a front valve cover and a rear valve cover.
3. The multi-stage electro-hydraulic servo cylinder of claim 2, wherein: the oil storage device comprises an oil storage cylinder barrel and an isolation piston sliding in the oil storage cylinder barrel, wherein one end of the oil storage cylinder barrel is fixed on a rear valve cover in a sealing mode, a rear cover is arranged at the other end of the oil storage cylinder barrel in a sealing mode, an oil storage cavity is formed between the isolation piston and the rear valve cover, a constant-pressure cavity is formed between the isolation piston and the rear cover, an air inlet hole and an air outlet hole which are communicated with the constant-pressure cavity are formed in the rear cover, the air inlet hole is communicated with external compressed air, and the air outlet hole is communicated with the outside through a pressure relief valve.
4. A multi-stage electro-hydraulic servo cylinder as claimed in claim 3 wherein: and an oil outlet and an oil return hole which are respectively communicated with the oil storage cavity are arranged in the rear valve cover.
5. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: one side of the connecting flange outwards protrudes to form a mounting boss, the servo motor is fixed on the mounting boss and is connected to the oil pump through a coupler in a driving mode, and the oil way distributor is fixed on the side face, adjacent to the mounting boss, of the connecting flange.
6. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: the connecting flange is internally provided with a second oil inlet and outlet hole communicated with the process cavity, a third oil inlet and outlet hole communicated with the working cavity and an oil supplementing hole communicated with the filling valve respectively.
7. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: the front cover is connected to the corresponding end part of the cylinder barrel in a sealing mode through a front cover mounting plate, the front cover mounting plate is connected to the connecting flange through a first bolt, and a third oil inlet and outlet hole communicated with the return cavity is formed in the front cover.
8. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: the oil way distributor comprises a valve plate and a cartridge valve arranged on the valve plate.
9. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: the oil pump is a positive and negative rotation oil pump.
10. The multi-stage electro-hydraulic servo cylinder of claim 1, wherein: the oil storage cavity, the process cavity, the return cavity and the working cavity are all provided with oil injection and exhaust group holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733163.5A CN115263850B (en) | 2022-06-24 | 2022-06-24 | Multistage electrohydraulic servo cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733163.5A CN115263850B (en) | 2022-06-24 | 2022-06-24 | Multistage electrohydraulic servo cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115263850A CN115263850A (en) | 2022-11-01 |
| CN115263850B true CN115263850B (en) | 2024-05-17 |
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| DE19854787A1 (en) * | 1998-11-27 | 2000-05-31 | Zahnradfabrik Friedrichshafen | Device for filling of hydrodynamic retarder has stepped piston and return spring installed in cylinder forming part of hydraulic pump, and drive has check valves in lines to inlet and outlet ports respectively |
| JP2009030652A (en) * | 2007-07-24 | 2009-02-12 | Miyoshi:Kk | Multi-stage telescopic drive device |
| CN101733351A (en) * | 2008-10-12 | 2010-06-16 | 通裕重工股份有限公司 | 120MN free forging oil press |
| CN201475066U (en) * | 2009-07-16 | 2010-05-19 | 苏州托克斯冲压设备有限公司 | Gas-liquid force amplifying mechanism |
| CN102562709A (en) * | 2011-12-30 | 2012-07-11 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN105443493A (en) * | 2015-12-23 | 2016-03-30 | 上海华岛液压设备制造有限公司 | Multi-stage hydraulic cylinder with automatic compensating device |
| CN106194877A (en) * | 2016-08-30 | 2016-12-07 | 北京机械设备研究所 | A kind of Synchronized Telescopic Flow of Cylinder compensation device |
| CN106739910A (en) * | 2016-12-19 | 2017-05-31 | 徐州重型机械有限公司 | A kind of Multistage suspension oil cylinder, suspension and engineering truck |
| CN107454928A (en) * | 2017-04-20 | 2017-12-08 | 惠州市科特测控工程有限公司 | A kind of electro-hydraulic servo power cylinder |
| CN108071629A (en) * | 2017-12-14 | 2018-05-25 | 北京航天发射技术研究所 | A kind of double multi-stage oil cylinder synchronous lifting hydraulic systems |
| CN109958674A (en) * | 2017-12-25 | 2019-07-02 | 陕西汽车集团有限责任公司 | Compression type garbage truck shoveling back pressure automatic compensation controller and its method |
| CN207795737U (en) * | 2018-01-26 | 2018-08-31 | 广州白云液压机械厂有限公司 | A kind of constant-speed multi-stage oil cylinder |
| CN109630488A (en) * | 2018-07-09 | 2019-04-16 | 襄阳博亚精工装备股份有限公司 | One pushes away the multistage hydraulic execution distributor for guaranteeing synchronization |
| CN209228784U (en) * | 2018-12-04 | 2019-08-09 | 燕山大学 | A kind of the multifunctional servo hydraulic cylinder and its hydraulic control circuit of the control of three chambers |
| CN209430526U (en) * | 2019-01-11 | 2019-09-24 | 浙江工业职业技术学院 | A kind of multistage hydraulic cylinder |
| CN209654352U (en) * | 2019-02-22 | 2019-11-19 | 济南华凯葳液压科技有限公司 | A kind of hydraulic circuit flow passage structure of telescopic multistage hydraulic cylinder |
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| CN212337777U (en) * | 2020-08-31 | 2021-01-12 | 泸州合成液压件有限公司 | Multistage hydraulic cylinder |
| CN112460080A (en) * | 2020-10-19 | 2021-03-09 | 东莞市迅拓自动化科技有限公司 | Servo electrohydraulic booster cylinder |
| CN113124086A (en) * | 2021-02-26 | 2021-07-16 | 江苏开沃汽车有限公司 | Multi-cavity shock absorber for energy recovery and working method |
| CN113134565A (en) * | 2021-05-24 | 2021-07-20 | 苏州施米特机械有限公司 | Servo electric cylinder with pneumatic piston |
| CN214814525U (en) * | 2021-05-24 | 2021-11-23 | 苏州施米特机械有限公司 | Servo electric cylinder with pneumatic piston |
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