Pressure cylinder device

Abstract

The utility model discloses a pressure cylinder device, which comprises a power electric cylinder assembly, a pressure cylinder assembly, a pressure cylinder assembly, a pressure cylinder assembly and a pressure cylinder assembly, the power electric cylinder assembly comprises a servo motor, a speed reducing mechanism and a high-pressure power cylinder, the high-pressure power cylinder is a piston oil cylinder, a piston and a piston rod are arranged in the high-pressure power cylinder, and the piston divides the interior of a cylinder body into a reset cavity and a pressure cavity; the pressurizing mechanism comprises a high-pressure power cylinder barrel, a pressurizing rod capable of axially stretching into the high-pressure power cylinder barrel, and a power driving source for driving the pressurizing rod to stretch out and draw back; the oil storage cylinder is connected with a reset cavity of the high-pressure power cylinder through a first oil pipe and connected with an oil supplementing opening of the high-pressure power cylinder barrel through a first oil way; the electric control system is configured to control the stroke motion of the servo motor and the pressurization action of the power driving source; and a high-pressure output oil way of the high-pressure power cylinder barrel is communicated to a pressurizing cavity of the high-pressure power cylinder. The utility model has the advantages of controllable stroke, stable output pressure and no oil injection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure boosting, in particular to a pressure boosting cylinder device. BACKGROUND

[0002] The pressure boosting cylinder is a pressure element capable of converting input pressure into output at a higher pressure, which can be driven by hydraulic oil, compressed gas or gas-liquid combination. The piston rod of the pressure boosting cylinder is mainly driven by hydraulic oil or compressed gas to reciprocate, and provides a certain pressure when extending outward, and is retracted when not in use. During pressure boosting, high-pressure hydraulic oil or compressed air is continuously input into the piston cavity to push against the piston, so that the piston and the piston rod arranged on the piston remain outwardly protruding, thereby achieving the purpose of increasing pressure.

[0003] The conventional pressure boosting cylinder is driven by combining hydraulic pressure and air pressure, the hydraulic cylinder pushes the piston rod to protrude, and then the pressure boosting cylinder or the pressure boosting hydraulic cylinder drives the hydraulic oil into the piston cavity to achieve the purpose of pressure boosting. When the piston rod is reset by using the conventional pressure boosting technology, the stroke and the working oil return are in a high-pressure and high-speed state, and an oil-gas mixture is generated in the oil return tank of the hydraulic cylinder. The oil-gas mixture is easy to be sprayed outwards to contaminate the processed products, such as food-grade products such as lunch boxes. Usually, an oil tank inlet and outlet air port valve is arranged on the oil return tank to isolate the oil-gas mixture, but the isolation effect is not complete, and the oil-gas mixture may be sprayed out of the oil return tank. In addition, the positioning of the piston rod driven by hydraulic pressure is not accurate, the pressure is unstable, and the stroke is difficult to control.

[0004] The existing pressure boosting cylinder is also driven by an electric cylinder during work. A servo motor is used to drive the output shaft to push the piston rod to protrude outward. In order to ensure the pressure output by the piston rod, a large-power electric cylinder is often used. The high-power servo motor is large in size and high in cost, which leads to high cost of the electric cylinder and large energy consumption of the servo motor driving the output shaft in the corresponding output stroke, resulting in waste of power.

[0005] The problems of oil-gas spraying, high cost, large energy consumption and large size of the existing pressure boosting cylinder in the prior art have become technical problems to be solved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a pressure boosting cylinder device and a pressure boosting method using the pressure boosting cylinder device. The piston rod of the high-pressure power cylinder is driven by the servo motor to move in the idle stroke. After the piston rod is in place, the pressure boosting rod is driven by the pressure boosting mechanism to extend into the high-pressure power cylinder barrel to press the hydraulic oil, so that the pressure is transmitted to the pressure boosting cavity of the high-pressure power cylinder, thereby achieving the pressure boosting effect of the piston rod. During the return stroke, the piston rod is pulled back by the servo motor, and the stroke is controllable, the positioning is accurate, the output pressure is stable, and the phenomenon of oil spraying is prevented.

[0007] To achieve the above object, the utility model provides technical scheme is: a kind of pressure cylinder device, comprising:

[0008] Power cylinder assembly, containing servo motor, with the transmission connection of servo motor reduction mechanism, and the high pressure power cylinder driven by reduction mechanism, high pressure power cylinder is piston oil cylinder, its inside is equipped with piston and piston rod, piston will cylinder body inside be separated into reset chamber and pressure chamber;

[0009] Pressure mechanism, containing high pressure power cylinder barrel, the pressure rod that can extend axially into high pressure power cylinder barrel, and the power drive source that drives pressure rod extension, power drive source uses servo motor or air cylinder;

[0010] Oil storage cylinder, reset chamber of high pressure power cylinder is connected by first oil pipe, and oil filling port of high pressure power cylinder barrel is connected by first oil circuit;

[0011] Electric control system is configured to control the stroke movement of servo motor and the pressure action of power drive source;

[0012] High pressure output oil circuit of high pressure power cylinder barrel is communicated to the pressure chamber of high pressure power cylinder rear side.

[0013] The utility model adopts above technical scheme, and servo motor drives reduction mechanism action, reduction mechanism drives piston rod of high pressure power cylinder to extend and abut against workpiece, pressure mechanism drives pressure rod to extend into high pressure power cylinder barrel by power drive source, so that hydraulic oil in high pressure power cylinder barrel is extruded, high pressure power cylinder barrel is communicated to the pressure chamber of high pressure power cylinder by high pressure output oil circuit, and pressure is transmitted to piston, so that piston and piston rod are subjected to superimposed pressure, play pressure boosting effect, in the process of pressure boosting, the oil liquid of reset chamber of high pressure power cylinder is returned to oil storage cylinder by first oil pipe;When resetting, pressure drive source drives pressure rod to retract from high pressure power cylinder barrel, and the pressure of high pressure power cylinder barrel to high pressure power cylinder is unloaded, servo motor reverses, and piston rod is driven to retract and leave workpiece by reduction mechanism, in the process of return, the oil liquid of pressure chamber is returned to high pressure power cylinder barrel by high pressure output oil circuit, and the oil liquid in oil storage cylinder flows into reset chamber of high pressure power cylinder by first oil pipe;Piston rod is driven to extend movement by servo motor in no-load stroke stage, and piston rod is retracted when returning, and the stroke is stable, positioning is accurate, output pressure is stable, and oil gas is not sprayed when oil return;Pressure is boosted by pressure drive source, the power of servo motor is reduced, so that the power of power cylinder assembly is reduced, the volume is reduced, and the cost is reduced.

[0014] The above-mentioned pressure cylinder device, the pressure mechanism is configured as at least one group, for driving pressure rod axially into high pressure power cylinder barrel.The number of pressure mechanism is superimposed, and the power of servo motor can be reduced accordingly.

[0015] The above-mentioned supercharged cylinder device comprises a servo motor and a transmission connection reduction mechanism, and the high-pressure power cylinder is driven by the reduction mechanism.

[0016] The above-mentioned supercharged cylinder device, the front end of the high-pressure power cylinder is provided with a high-pressure power cylinder front cover, and the rear end is provided with a high-pressure power cylinder rear cover, the high-pressure power cylinder rear cover is connected with the high-pressure power cylinder, the power driving source is provided with a supercharged front cover, the supercharged front cover is arranged on the side wall of the high-pressure power cylinder rear cover, the high-pressure power cylinder rear cover is provided with a high-pressure output oil way, and the high-pressure power cylinder barrel is communicated with the supercharged cavity through the high-pressure output oil way.

[0017] The above-mentioned supercharged cylinder device, the oil storage cylinder is provided with an oil storage cylinder front cover, the oil storage cylinder front cover is arranged on the side wall of the supercharged front cover, and the oil storage cylinder front cover and the supercharged front cover are communicated through a first oil way.

[0018] The above-mentioned supercharged cylinder device, the outer side of the high-pressure power cylinder front cover is provided with a flange. The flange is used for installing and fixing the supercharged cylinder device.

[0019] The above-mentioned supercharged cylinder device, when the power driving source is a servo electric cylinder, the output end is connected with the supercharged rod through a ball screw; when the power driving source is a cylinder, the air pressure input is controlled through a proportional valve. The proportional valve controls the air pressure input in the cylinder barrel of the cylinder for driving the movement of the supercharged rod, and the control of the proportional valve can control the rate of the supercharged rod and improve the accuracy of the supercharging.

[0020] The above-mentioned supercharged cylinder device, the top of the oil storage cylinder is provided with an external air vent valve and the inside is kept at a constant pressure. The external air vent valve is used for properly discharging the air pressure in the oil storage cylinder, keeping the inside of the oil storage cylinder at a constant pressure, and avoiding oil and gas from being sprayed out.

[0021] The above-mentioned supercharged cylinder device, the electric control system is provided with a stroke control module, and the switching points of the action stages are jointly judged by a position sensor arranged at the end of the piston rod and a pressure sensor in the supercharged cavity. The position sensor can be used to detect the movement position of the piston rod, judge whether the piston rod moves to the limit position of the empty load stroke, and thus start the supercharging mechanism to supercharge through the stroke control module of the electric control system. The position sensor can also be used to detect the reset movement of the piston rod to the position, so as to stop the reset action of driving the servo motor; the pressure sensor can be used to detect the pressure value applied to the piston rod by the supercharging mechanism.

[0022] The above-mentioned supercharged cylinder device is configured with the following actions by the electric control system:

[0023] a) In the empty load stroke stage, only the power electric cylinder assembly is started to drive the piston rod to move;

[0024] b) When the piston rod reaches the preset pressurizing position, all the supercharging mechanisms are started synchronously, so that the output pressure and the holding force vector of the power electric cylinder assembly are superimposed.

[0025] The idle stroke phase uses a small-power servo motor to drive the idle stroke phase movement, and achieves the technical effects of stable stroke and accurate positioning, and when the pressurization work is performed, the pressurization mechanism is synchronously started, so that the output pressure and the holding force vector of the power cylinder assembly are superimposed, the pressurization is performed by the pressurization driving source, the power of the servo motor of the power cylinder assembly is reduced, the volume is reduced, and the cost is reduced.

[0026] The utility model also provides a kind of pressurization method for pressurization using the pressurization cylinder device of any one of the above technical solutions, comprising the following steps:

[0027] Idle stroke phase: servo motor drives high-pressure power cylinder piston rod to extend, and reset cavity oil liquid is returned to oil storage cylinder through first oil pipe;

[0028] Pressurization phase: when contacting workpiece, the pressurization mechanism is started by electric control system, and power driving source pushes pressurization rod to compress oil liquid in high-pressure oil cylinder, and high-pressure oil enters pressurization to form superimposed pressure through output oil circuit;

[0029] Return phase: servo motor reverses, and oil storage cylinder supplements oil to high-pressure oil cylinder through second oil pipe, and reset cavity inhales oil storage cylinder oil to complete reset.

[0030] The above-mentioned pressurization method, electric control system, is configured to the following actions:

[0031] a) first drive power cylinder assembly to complete the axial stroke of piston rod to be in place or reset action;

[0032] b) start pressurization mechanism to pressurize or depressurize high-pressure oil cylinder.

[0033] The above-mentioned pressurization method, electric control system, is configured to the following actions:

[0034] a1) first drive power cylinder assembly to complete the axial stroke of piston rod;

[0035] b1) start pressurization mechanism to pressurize high-pressure oil cylinder;

[0036] b2) drive pressurization mechanism to depressurize high-pressure oil cylinder;

[0037] a2) drive power cylinder assembly to complete the axial stroke reset of piston rod.

[0038] The above-mentioned pressurization method, electric control system, is configured to the following actions:

[0039] a) in idle stroke phase, only start power cylinder assembly to drive piston rod to move;

[0040] b) When the piston rod reaches the preset pressurization position, all the pressurization mechanisms are synchronously started to make their output pressure superimposed with the holding force vector of the power cylinder assembly.

[0041] The utility model discloses obtained beneficial effect is: by servo motor promotes piston movement to the specified position, and pressurization drive cylinder action, drive piston compresses hydraulic oil and supplements into the pressurization chamber of high pressure power cylinder, and the piston rod of support piston, plays the role of pressurization. The output end of servo motor is supported piston through mechanical structure when the piston rod stretches and provides pressure, and will not be compressed, realizes the pressure output of keeping good, has the advantage of stable output pressure. Adopt servo motor as main propulsion power, compared with traditional hydraulic drive has the characteristics of accurate positioning.

[0042] Adopt servo motor drive piston rod stretch, and when back, will not produce the problem of oil gas mixture and leakage, can be applicable to the production of food grade product, and servo motor positioning is accurate, and the pressurization of combining pressurization mechanism, reduce the power of servo motor while playing the pressurization effect, has the advantages of energy saving, small volume.

[0043] Servo motor, high pressure power cylinder, high pressure power cylinder barrel and oil storage cylinder form closed oil circuit, and the accurate driving and reset speed of servo motor are controlled accurately, so that the piston rod of high pressure power cylinder is not in high speed and high pressure state in the stroke of stretching and providing pressure and retracting reset, and oil vapor leakage is prevented through physical isolation. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is the three-dimensional structure schematic diagram of the pressurization cylinder device of the first embodiment of the utility model, and

[0045] Figure 2 It is the section structure schematic diagram of the pressurization cylinder device of the first embodiment of the utility model, and

[0046] Figure 3 It is the three-dimensional structure schematic diagram of the pressurization cylinder device of the second embodiment of the utility model, and

[0047] Figure 4 It is the section structure schematic diagram of the pressurization cylinder device of the second embodiment of the utility model, and

[0048] Figure 5 It is the structure schematic diagram of the pre-pressurization state of the pressurization cylinder device of the first embodiment of the utility model, and

[0049] Figure 6 It is the structure schematic diagram of the pressurization state of the pressurization cylinder device of the first embodiment of the utility model, and

[0050] Figure 7 It is the structure schematic diagram of the pressure relief state of the pressurization cylinder device of the first embodiment of the utility model, and

[0051] Figure 8 is a structure schematic view of a return state of the first embodiment of the utility model;

[0052] Figure 9 is a structure schematic view of a pre-press state of the second embodiment of the utility model;

[0053] Figure 10 is a structure schematic view of a pressurization state of the second embodiment of the utility model;

[0054] Figure 11 is a structure schematic view of a pressure relief state of the second embodiment of the utility model;

[0055] Figure 12 is a structure schematic view of a return state of the second embodiment of the utility model;

[0056] Figure 13 is a control system schematic view of the electric control system controlling servo motor and pressurization mechanism motion of the utility model.

[0057] Mark explanation: power cylinder assembly 1, servo motor 101, speed reduction mechanism 102, high pressure power cylinder 103, piston 104, piston rod 105, reset cavity 106, pressurization cavity 107, flange 108, pressurization mechanism 2, high pressure power cylinder barrel 201, pressurization rod 202, power drive source 203, high pressure output oil way 204, pressurization front cover 205, proportional valve 206, electromagnetic valve 207, gas source processor 208, gas source 209, oil storage cylinder 301, first oil pipe 302, first oil way 303, oil storage cylinder front cover 304, outer air vent valve 305, electric control system 401, position sensor 402, pressure sensor 403. DETAILED DESCRIPTION

[0058] The utility model will be further explained in connection with the drawings and specific embodiment.

[0059] Referring to Figures 1 to 4 , a pressurization cylinder device is characterized by comprising:

[0060] Power cylinder assembly 1 contains servo motor 101, speed reduction mechanism 102 with servo motor 101 transmission connection and high pressure power cylinder 103 driven by speed reduction mechanism 102, and high pressure power cylinder 103 is piston oil cylinder, which is provided with piston 104 and piston rod 105, and piston divides the cylinder body into reset cavity 106 and pressurization cavity 107;

[0061] The booster mechanism 2 comprises a high-pressure power cylinder 201, a booster rod 202 axially extendable into the high-pressure power cylinder 201, and a power driving source 203 driving the extension and retraction of the booster rod, which is a servo motor or a pneumatic cylinder;

[0062] The oil storage cylinder 301 is connected to the reset chamber 106 of the high-pressure power cylinder through the first oil pipe 302 and to the oil supplement port of the high-pressure power cylinder 201 through the first oil way 303.

[0063] The electric control system 401 is configured to control the stroke movement of the servo motor 101 and the boosting action of the power driving source 203.

[0064] The high-pressure output oil way 204 of the high-pressure power cylinder 201 is communicated to the booster chamber 107 at the rear side of the high-pressure power cylinder.

[0065] The servo motor 101 is used to drive the extension and retraction of the piston rod 105 of the high-pressure power cylinder 103, which has the characteristics of stable output pressure, controllable speed, pressure and stroke. The booster mechanism 2 is configured as at least one group, which is used to drive the booster rod 202 to axially extend into the high-pressure power cylinder 201.

[0066] The booster mechanism 2 is configured as at least one group, which is used to drive the booster rod 202 to axially extend into the high-pressure power cylinder 201. With each additional group of power driving source 203 and high-pressure power cylinder 201, the power of the servo motor 101 can be correspondingly reduced, thereby reducing the power, volume and cost of the power cylinder assembly 1. In specific use, the combination of multiple groups of power driving source 203 and high-pressure power cylinder 201 can also be used in parallel with a hydraulic cylinder driven by hydraulic oil, forming an oil-gas composite drive. In this embodiment, the booster mechanism 2 can be an electric cylinder combined with a differential gear box and a screw nut structure.

[0067] The front end of the high-pressure power cylinder 103 is provided with a high-pressure power cylinder front cover 104, and the rear end is provided with a high-pressure power cylinder rear cover 105. The high-pressure power cylinder rear cover 105 is connected to the high-pressure power cylinder 103. The power driving source 203 is provided with a booster front cover 205, which is arranged on the side wall of the high-pressure power cylinder rear cover 105. The booster front cover 205 and the high-pressure power cylinder rear cover 105 are provided with a high-pressure output oil way 204. The high-pressure power cylinder 201 is communicated to the booster chamber 107 through the high-pressure output oil way 204.

[0068] The oil storage cylinder 301 is provided with an oil storage cylinder front cover 304, which is arranged on the side wall of the booster front cover 205. The oil storage cylinder front cover 304 and the booster front cover 205 are communicated to the high-pressure power cylinder 201 through the first oil way 303.

[0069] The outer side of the high-pressure power cylinder front cover 104 is provided with a flange 108.

[0070] When the power driving source 203 is a servo cylinder, the output end thereof is connected with the booster rod 202 through a ball screw; when the power driving source 203 is a pneumatic cylinder, the gas pressure input is controlled through a proportional valve 206. Figure 1 When the power driving source 203 is a pneumatic cylinder, the gas source 209 is used to provide high-pressure gas to drive the cylinder to act. The gas flow delivered to the power driving source 203 is high-pressure gas flow, which is achieved by boosting through a booster pump. The pipeline connecting the gas source 209 with the cylinder is provided with a gas source processor 208 and an electromagnetic valve 207. The gas source processor 208 is used to process the gas flow to keep the gas flow dry, and the electromagnetic valve 207 is used to switch on and off and switch the high-pressure gas flow, so as to control the power driving source 203 to drive the booster rod 204 to extend or retract. The proportional valve 206 can be a pressure reducing valve, which is used to control the gas pressure input.

[0071] The top of the oil storage cylinder 301 is provided with an external vent valve 306, and the inside is kept at a constant pressure.

[0072] The electric control system 401 is provided with a stroke control module, which jointly judges the action stage switching point through a position sensor 402 arranged at the end of the piston rod 105 and a pressure sensor 403 arranged in the booster cavity 107.

[0073] The high-pressure power cylinder barrel 201 is communicated with the booster cavity 107 of the high-pressure power cylinder 103. The servo motor 101 is connected with the piston 104 through a speed reduction mechanism 102, and drives the piston rod 105 to axially move to a position and return. The speed reduction mechanism 102 can drive the lead screw to axially move in a straight line through the structure of the screw-nut pair, and connect the piston 104 and the piston rod 105 through the lead screw, so as to drive the piston rod 105 to extend and retract. When the piston rod 105 extends out of the high-pressure power cylinder 103, a certain pressure is provided to the outside. When not in use, the power cylinder assembly 1 pulls back the piston rod 105. The power driving source 203 extends into the high-pressure power cylinder barrel 201 through the booster rod 202, so that the hydraulic oil in the high-pressure power cylinder barrel 201 enters the booster cavity 107 to apply pressure to the piston 104, and the booster rod 105 is boosted. The oil storage cylinder 301 is communicated with the reset cavity 106 of the high-pressure power cylinder 103 through the first oil pipe 302, so that the hydraulic oil flows back to the oil storage cylinder 301 from the reset cavity 106 when the piston rod 105 extends outwards. When the piston rod 105 moves inwardly, the hydraulic oil in the booster cavity 107 of the high-pressure power cylinder 103 flows back to the high-pressure power cylinder barrel 201, and part of the hydraulic oil in the oil storage cylinder 301 is sucked into the reset cavity 106, so as to realize the circulation of the hydraulic oil.

[0074] The power driving source 203 adopts a servo motor or a pneumatic cylinder. The servo motor is connected with a speed reduction mechanism and a screw-nut pair to form an electric cylinder. The booster rod 202 of the electric cylinder axially extends into the high-pressure power cylinder barrel 201 to extrude the hydraulic oil, so that the pressure is transmitted to the booster cavity 107 of the high-pressure power cylinder 103 to achieve the purpose of boosting.

[0075] AsFigure 13 As shown, the control system is a schematic diagram of the control system for controlling the servo motor and the pressurizing mechanism; the electric control system 401 is connected to the servo motor 101 and the power driven source 203 through lines, the electric control system 401 drives the servo motor 101 to work to realize the idle stroke of the piston rod 105, the electric control system 401 drives the cylinder power driven source 203 to work, drives the pressurizing rod 202 to extend into the high-pressure cylinder barrel 201, and realizes the pressurizing stroke.

[0076] The embodiment also discloses a pressurizing method using the pressurizing cylinder device in the specific embodiment, and the method comprises the following steps.

[0077] Idle stroke stage: the servo motor 101 drives the high-pressure cylinder 103 piston rod 105 to extend, and the oil liquid in the reset cavity 106 returns to the oil storage cylinder 301 through the first oil pipe 302;

[0078] Pressurizing stage: when contacting the workpiece, the electric control system 401 starts the pressurizing mechanism 2, the power driven source 203 pushes the pressurizing rod 202 to compress the oil liquid in the high-pressure cylinder barrel 201, the high-pressure oil enters the pressurizing cavity 107 through the output oil way 204 to form the superimposed pressure;

[0079] Return stroke stage: the servo motor 101 reverses, the oil storage cylinder 301 supplements the oil to the high-pressure cylinder barrel 201 through the second oil pipe 303, and the reset cavity 106 inhales the oil liquid in the oil storage cylinder to complete the reset.

[0080] Specifically, the electric control system 401 is configured to perform the following actions:

[0081] a) First, drive the power cylinder assembly to complete the axial stroke of the piston rod 105 to the reset action;

[0082] b) Start the pressurizing mechanism to pressurize or depressurize the high-pressure cylinder 201.

[0083] The electric control system 401 is configured to perform the following actions:

[0084] a1) First, drive the power cylinder assembly to complete the axial stroke of the piston rod 105 to the reset action;

[0085] b1) Start the pressurizing mechanism to pressurize the high-pressure cylinder barrel 201;

[0086] b2) Drive the pressurizing mechanism to depressurize the high-pressure cylinder barrel 201;

[0087] a2) Drive the power cylinder assembly to complete the axial stroke of the piston rod 105 to the reset action.

[0088] The electric control system 401 is configured to perform the following actions:

[0089] a) In the idle stroke stage, only the power cylinder assembly is started to drive the piston rod 105 to move;

[0090] b) When the piston rod reaches the preset pressurization position, all the pressurization mechanisms are synchronously started to make their output pressure superimposed with the holding force vector of the power cylinder assembly;

[0091] The maximum output force F1 of the power cylinder assembly and the total output force F2 of the pressurization mechanism group satisfy: F2≥3F1.

[0092] In the specific implementation process, the oil circuit system working process mainly has an idle stroke stage, a pressurization stage and a return stroke stage, the idle stroke stage is the process that the power cylinder assembly 1 drives the piston rod 105 to extend out of the high-pressure power cylinder 103, in this process, the piston rod 105 moves from not contacting the load to contacting the workpiece; the pressurization stage is that the piston rod 105 contacts the workpiece and outputs pressure, the power driving source 203 acts to pressurize the piston rod 105 through the high-pressure power cylinder barrel 201; the pressure relief stage is that the power driving source 203 resets to release the pressure in the high-pressure power cylinder 4; and the return stroke stage is the process that the power driving source 203 releases pressure and the power cylinder assembly 1 drives the piston rod 105 to retract into the high-pressure power cylinder 103.

[0093] In the idle stroke stage, the servo motor 101 drives the piston rod 105 of the high-pressure power cylinder 103 to extend out, and the hydraulic oil in the reset cavity 106 flows back to the oil storage cylinder 301 through the first oil pipe 302. The hydraulic oil in the oil storage cylinder 301 supplements the oil to the high-pressure power cylinder barrel 201 through the first oil circuit 303.

[0094] In the pressurization stage, when the piston rod 105 contacts the workpiece, the power driving source 203 is controlled by the electric control system 7 to act to push the pressurization rod 202 to compress the hydraulic oil in the high-pressure power cylinder barrel 201, the high-pressure hydraulic oil enters the pressurization cavity 107 through the high-pressure output oil circuit 204 to form superimposed pressure, and the pressurization of the piston rod 105 is realized.

[0095] In the pressure relief stage, the power driving source 203 controls the pressurization rod 202 to retract to release the pressure on the high-pressure power cylinder barrel 201.

[0096] In the return stroke stage, the servo motor 101 is reversed to drive the piston 104 and the piston rod 105 to reset back through the power cylinder assembly 1, the hydraulic oil in the pressurization cavity 107 flows back to the high-pressure power cylinder barrel 201 through the high-pressure output oil circuit 204, and the hydraulic oil in the oil storage cylinder 301 supplements the oil to the reset cavity 106.

[0097] The working process of the utility model in the specific implementation is combined with the description in the specification Figure 5 to the attached Figure 12 Further described as follows.

[0098] In the pre-pressing process, as shown in Figure 5 or Figure 9 , the power cylinder assembly 1 pushes the piston 104 and the piston rod 105 to move outward to a predetermined position, at this time the hydraulic oil in the reset chamber 106 of the high-pressure cylinder 103 is returned to the oil storage cylinder 301 through the first oil pipe 302, and the pressurizing chamber 107 of the high-pressure cylinder 103 sucks the hydraulic oil in the high-pressure cylinder barrel 201.

[0099] In the pressurizing process, as shown in Figure 6 or Figure 10 , when the piston rod 105 extends to a predetermined position, the power driving source 203 is actuated, and the pressurizing rod 202 moves towards the high-pressure cylinder barrel 201 and extends into the high-pressure cylinder barrel 201, so that the hydraulic oil in the high-pressure cylinder barrel 201 is squeezed and the pressure is transmitted to the pressurizing chamber 107 of the high-pressure cylinder 103 through the high-pressure output oil way 204, so that the hydraulic oil in the pressurizing chamber 107 exerts a certain pressure on the piston 104 and the piston rod 105, achieving the effect of pressurization. In the pre-pressing and pressurizing processes, the hydraulic oil in the reset chamber 106 of the high-pressure cylinder 103 is returned to the oil storage cylinder 301 through the first oil pipe 302.

[0100] In the pressure relief process, as shown in Figure 7 or Figure 11 , the power driving source 203 is actuated, and the pressurizing rod 202 moves away from the high-pressure cylinder barrel 201 to release the pressure on the high-pressure cylinder barrel 201, and then the power cylinder assembly 1 pulls the piston 104 and the piston rod 105 back.

[0101] In the return process, as shown in Figure 8 or Figure 12 , the power driving source 203 is completely reset, the power cylinder assembly 1 continues to pull the piston 104 and the piston rod 105 back, and the piston 104 squeezes the hydraulic oil in the pressurizing chamber 107 back to the high-pressure cylinder barrel 201 and the oil storage cylinder 301. At the same time, the hydraulic oil in the oil storage cylinder 301 also flows to the reset chamber 106 of the high-pressure cylinder 103 through the first oil pipe 302, thus completing one action cycle; at this time, the piston rod 105 is reset to the initial position.

[0102] The utility model discloses a pressure test, when input pressure position 20MPa, power drive source 203 is by servo motor drive's pressure boost cylinder, the output pressure of superposition after piston rod 105 reaches 82MPa, system response time is less than or equal to 0.3s;Hydraulic oil and high pressure gas composite drive, namely high pressure gas drive power drive source 203 in pressure boost rod 202 compresses the hydraulic oil combination mode of high pressure power cylinder 201, the output pressure of superposition after piston rod 105 reaches 75MPa, unit stroke energy consumption reduces 62% compared with pure electric cylinder drive.Oil-gas isolation test shows that after 1000 cycles, the oil gasolene content in oil storage cylinder 301 is less than 0.005ppm.

[0103] The utility model creatively constructs basic power + pressure boost cluster system, realizes power decoupling, vector superposition and dynamic compensation.

[0104] Power decoupling: only low-power motor (≤2KW) is driven in stroke stage, and a plurality of small-power power drive sources 203 (single rent ≤5KW) work cooperatively in high pressure stage.Vector superposition: N groups of power drive sources 203 are combined and connected in parallel with high pressure power cylinder 201, and the total output pressure F2 and the output pressure F1 of servo motor 1 satisfy F2 ≥ 3F1.Dynamic compensation: each parallel power drive source 203 and high pressure power cylinder 201 combination adopts independent closed-loop control, and real-time compensation pressure is driven.

[0105] In some embodiments, the power drive source 203 is a pressure boost cylinder driven by 3 groups of servo motors, each group is configured with a 3.5KW servo motor, when the piston rod 105 reaches the pressurization position, the servo motor 101 (2KW) of the servo motor 1 is converted to a position holding mode, and the power consumption is reduced to 0.8KW; 3 groups of electric cylinders composed of servo motors, differential gear boxes and screw nut structures are synchronously started, and the total power is 10.5KW; the differential gear box couples the outputs of the three groups to the pressure boost drive rod 26, and the output resultant force reaches 4.2 times of the servo motor 101.

[0106] The energy consumption comparison data of the utility model and the traditional scheme in the embodiment are as follows:

[0107] | Working condition | Traditional scheme | The utility model |

[0108] | Idle stage energy consumption | 15KW | 0.75KW |

[0109] | Pressurization stage energy consumption | 15KW | 12KW |

[0110] | Comprehensive power saving rate | - | 58% |

[0111] In 50 tons of stamping test, the traditional electric cylinder needs 15KW servo motor to work all the time, the measured energy consumption is 204.3kwh / 1000 times; the idle stage of the embodiment is 0.75KW+10.5KW in the pressurization stage, the measured high position is 9.8kwh / 1000 times; the pressure dialing is reduced from ±8% to ±1.2%.

[0112] The utility model discloses a pure electric cylinder drive or by the square mode of hydraulic pressure, air pressure drive in traditional mode is improved, the utility model divides the stage action control, through first completing servo motor's full stroke reset, makes the oil volume change of oil storage cylinder minimization ( is controlled within 5%), and oil liquid disturbance is reduced greatly, atmospheric pressure oil storage design, and oil storage cylinder always keeps atmospheric pressure state, and its outer air valve only micro -aeration under very small pressure difference, and cooperation submicron grade filtering realizes zero oil molecule penetration, oil circuit pressure isolation, and the first oil circuit of pressurization stage is completely physically isolated with oil storage cylinder, and high pressure oil vapor reverse diffusion is avoided.

[0113] In actual test, the oil liquid replacement cycle of the oil storage cylinder 301 of the utility model embodiment is prolonged from 80 hours to 2000 hours.

[0114] In summary, the utility model has as the content of the specification and drawing, and the practical sample is made and is tested by using many times, and from the effect of using test, it can be proved that the utility model can achieve the intended purpose, and the practical value is not doubtful. The above-mentioned examples are only used to conveniently illustrate the utility model, and do not limit the utility model in any form, and any person skilled in the art can make equivalent examples by using the disclosed technical content within the range of technical features, and the equivalent examples do not deviate from the technical features of the utility model, and still belong to the range of the technical features of the utility model.

Claims

1. A supercharged cylinder device, characterized by, The application relates to a power cylinder assembly (1) comprising a servo motor (101) and a high-pressure power cylinder (103) driven by the servo motor, wherein the high-pressure power cylinder (103) is a piston cylinder provided with a piston (104) and a piston rod (105) in the cylinder, and the piston divides the cylinder into a reset cavity (106) and a pressure boosting cavity (107); a pressure boosting mechanism (2) comprising a high-pressure power cylinder barrel (201), a pressure boosting rod (202) axially extending into the high-pressure power cylinder barrel (201), and a power driving source (203) driving the pressure boosting rod to extend and retract, wherein the power driving source (203) is a servo motor or a cylinder; an oil storage cylinder (301) connected to the reset cavity (106) of the high-pressure power cylinder through a first oil pipe (302) and connected to an oil supplementing port of the high-pressure power cylinder barrel (201) through a first oil path (303); an electric control system (401) configured to control the stroke movement of the servo motor (101) and the pressure boosting action of the power driving source (203); and a high-pressure output oil path (204) of the high-pressure power cylinder barrel (201) connected to the pressure boosting cavity (107) at the rear side of the high-pressure power cylinder. The pressure boosting mechanism (2) is configured as at least one group for driving the pressure boosting rod (202) to axially extend into the high-pressure power cylinder barrel (201). The front end of the high-pressure power cylinder (103) is provided with a high-pressure power cylinder front cover, and the rear end is provided with a high-pressure power cylinder rear cover; the power driving source (203) is provided with a pressure boosting front cover (205) arranged on the side wall of the high-pressure power cylinder rear cover; the pressure boosting front cover (205) and the high-pressure power cylinder rear cover are provided with the high-pressure output oil path (204); and the high-pressure power cylinder barrel (201) is connected to the pressure boosting cavity (107) through the high-pressure output oil path (204). The oil storage cylinder (301) is provided with an oil storage cylinder front cover (304) arranged on the side wall of the pressure boosting front cover (205); and the oil storage cylinder front cover (304) and the pressure boosting front cover (205) are connected to the high-pressure power cylinder barrel (201) through the first oil path (303). When the power driving source (203) is a servo motor, the output end of the power driving source (203) is connected to the pressure boosting rod (202) through a ball screw; and when the power driving source (203) is a cylinder, the pressure is controlled through a proportional valve (206). The oil storage cylinder (301) is provided with an external air vent valve (306) at the top and maintains constant pressure inside.

2. The supercharged cylinder device according to claim 1, characterized by: The electric control system (401) is provided with a stroke control module, and the position sensor (402) arranged at the end of the piston rod (105) and the pressure sensor (403) arranged in the pressure boosting cavity (107) are used to jointly judge the action stage switching point.

3. The supercharged cylinder device according to claim 1, characterized by: ​ 4. The supercharged cylinder device of claim 1, wherein: ​ 5. The supercharged cylinder device of claim 1, wherein: ​ 6. The supercharged cylinder device of claim 1, wherein: ​ 7. The supercharged cylinder device of claim 1, wherein: ​

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