WO2012126207A1 - Cylindre d'amortissement hydraulique, procédé de commande de ce cylindre et machine technique - Google Patents

Cylindre d'amortissement hydraulique, procédé de commande de ce cylindre et machine technique Download PDF

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Publication number
WO2012126207A1
WO2012126207A1 PCT/CN2011/075660 CN2011075660W WO2012126207A1 WO 2012126207 A1 WO2012126207 A1 WO 2012126207A1 CN 2011075660 W CN2011075660 W CN 2011075660W WO 2012126207 A1 WO2012126207 A1 WO 2012126207A1
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WO
WIPO (PCT)
Prior art keywords
buffer
cavity
hydraulic cylinder
chamber
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/075660
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English (en)
Chinese (zh)
Inventor
易小刚
刘永东
贺电
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Sany Intelligent Control Equipment Co Ltd
Sany Heavy Industry Co Ltd
Original Assignee
Hunan Sany Intelligent Control Equipment Co Ltd
Sany Heavy Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Sany Intelligent Control Equipment Co Ltd, Sany Heavy Industry Co Ltd filed Critical Hunan Sany Intelligent Control Equipment Co Ltd
Priority to BR112013012985A priority Critical patent/BR112013012985A2/pt
Publication of WO2012126207A1 publication Critical patent/WO2012126207A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/227—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having an auxiliary cushioning piston within the main piston or the cylinder end face

Definitions

  • the invention relates to the technical field of hydraulic cylinders, and in particular to a buffer hydraulic cylinder. Further, the present invention relates to a construction machine including the buffer hydraulic cylinder. Furthermore, the present invention further relates to a control method of the above buffer hydraulic cylinder. Background technique
  • the cylinder often uses a displacement sensor to detect whether the oil rainbow is in operation and thus controls its commutation.
  • the displacement sensor generally comprises a proximity switch and a detection block, which are respectively disposed on the cylinder tube and the piston rod.
  • the detection block enters the detection range of the proximity switch, and the proximity switch sends a position detection signal, and then The control unit issues an instruction to reverse the cylinder based on the detection signal.
  • the above position detecting signal is generally a magnetic signal or an optical signal, and the magnetic signal or optical signal is susceptible to external interference and has the disadvantage of low reliability.
  • the proximity switch cannot detect the detection block due to external interference, and the proximity switch cannot issue the position detection signal, so the control component cannot issue the reversing command, which leads to the piston of the cylinder. A severe impact with the cylinder tube caused damage to the cylinder.
  • the buffer hydraulic cylinder includes a cylinder barrel and a piston rod, and the piston rod is provided with a piston, and the piston separates the inner cavity of the cylinder tube into a rodless cavity and a rod cavity, and the A buffer device is provided in the rod cavity or the rod cavity, for example, the buffer device may be a buffer plunger, and the buffer plunger is moved when the piston moves to the end of the cylinder (that is, when the cylinder moves to near position)
  • the oil port corresponding to the rodless cavity is inserted, and the gap between the buffer plunger and the port wall of the port forms a throttle passage, and the buffer plunger, the piston and the cylinder form a buffer cavity.
  • the buffer chamber since the oil port is blocked by the buffer plunger, the buffer chamber communicates with the external oil passage only through the throttle passage, and thus the oil The cylinder is further compressed and the pressure in the buffer chamber suddenly increases.
  • the buffer plunger seal is inserted into the corresponding port of the rodless cavity, and the throttle passage is a separately opened throttle or orifice.
  • the position detection of the above-mentioned buffer hydraulic cylinder is also generally detected by an optical signal or a magnetic signal by a displacement sensor, and as described in the first paragraph above, there is also a disadvantage that reliability is not high.
  • the technical problem to be solved by the present invention is to provide a buffer hydraulic cylinder whose structure design can relatively reliably detect the position when the movement is in place or close to the position, thereby significantly improving the reliability of the work. Further, another technical problem to be solved by the present invention is to provide a construction machine including the buffer hydraulic cylinder. Furthermore, another technical problem to be solved by the present invention is to provide a control method for the above buffer hydraulic cylinder.
  • the present invention provides a buffer hydraulic cylinder including a cylinder barrel and a piston rod, wherein the piston rod is provided with a piston, and the piston separates the inner cavity of the cylinder barrel into a rodless cavity and a rod a chamber; at least one of the rodless chamber and the rod chamber is provided with a damping device such that the rod is formed in the rodless cavity when the piston is near the end of the cylinder a buffering cavity, the buffering cavity is connected to the external oil passage only through the throttle passage; the buffer hydraulic cylinder further includes a pressure measuring hole communicating with the buffering cavity, and the pressure measuring hole is connected a pressure detecting member that detects a pressure in the buffer chamber and emits a pressure detecting signal.
  • the buffer device comprises a spring seat and a spring
  • the spring seat is disposed on the piston rod, the spring is disposed between the spring seat and the piston;
  • the spring seat closes the oil port at the end cover to form the buffer cavity;
  • the side wall of the piston rod is axially linearly provided with at least one throttle groove gradually increasing in depth along the end cover, and at least one balance oil groove is circumferentially opened; the throttle channel For the throttle slot.
  • the buffer hydraulic cylinder further includes a control component, and the control component receives the pressure The force detection signal, and according to the signal, the cylinder reversing command is issued.
  • the buffer hydraulic cylinder further includes a control component, the control component receives the pressure detection signal, and determines whether the pressure of the buffer cavity is within a predetermined range of values;
  • control component issues an instruction to increase the oil intake amount of the rodless cavity or the rod cavity;
  • the control unit issues an instruction to reduce the amount of oil entering the rodless chamber or the rod chamber.
  • the buffer device is disposed in the rod cavity, and the rod cavity is formed with the buffer cavity;
  • the control component issues an instruction to increase the oil intake amount of the rodless cavity
  • the control unit issues an instruction to reduce the amount of oil entering the rodless chamber.
  • the buffer device is disposed in the rodless cavity, and the rodless cavity is formed with the buffer cavity;
  • control component issues an instruction to increase the oil intake amount of the rod cavity
  • the control unit issues an instruction to reduce the amount of oil entering the rod chamber.
  • the present invention also provides a construction machine comprising the buffer hydraulic cylinder according to any one of the above.
  • the present invention also provides a control method for a buffer hydraulic cylinder, comprising the following steps:
  • the buffer hydraulic cylinder provided by the present invention further comprises a pressure detecting component for detecting the pressure in the buffer chamber, and pressure detection is performed according to the sudden increasing pressure of the buffer cavity. signal.
  • the buffer cylinder When the buffer cylinder is running close to the position, the buffer cylinder enters The buffer zone, at this time, forms a buffer cavity in the rodless cavity or the rod cavity of the buffer hydraulic cylinder, and the buffer cavity communicates with the external oil passage only through the throttle passage, and thus the buffer hydraulic cylinder
  • the pressure in the buffer chamber suddenly increases, and the pressure detecting component detects the sudden increase of the pressure, and sends a pressure detection signal, according to which the hydraulic cylinder can be operated to be close to the position.
  • the buffer cylinder can then be used for reversing or other actions in time. Since the present invention determines the position of the hydraulic cylinder based on the sudden increase of the pressure signal in the buffer chamber, the structural design is designed to avoid external interference to a large extent relative to the structural design for position detection by optical signals or magnetic signals. Therefore, the reliability of the position detection is significantly improved, thereby improving the reliability of the operation of the buffer hydraulic cylinder.
  • the buffer hydraulic cylinder provided by the present invention can relatively reliably detect the position when the movement is in position or close to the position, thereby significantly improving the reliability of the work.
  • the present invention provides a construction machine including the buffer hydraulic cylinder, and a control method of the buffer hydraulic cylinder, the technical effects of which are substantially the same as those of the above-described buffer hydraulic cylinder, and will not be described herein.
  • FIG. 1 is a schematic structural view of a buffer hydraulic cylinder according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a buffer hydraulic cylinder in a second embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a buffer hydraulic cylinder according to a third embodiment of the present invention.
  • Figure 4 is a schematic structural view of a buffer hydraulic cylinder in a fourth embodiment of the present invention.
  • Figure 5 is a schematic structural view of a buffer hydraulic cylinder in a fifth embodiment of the present invention.
  • Figure 6 is a schematic structural view of a buffer hydraulic cylinder in a sixth embodiment of the present invention.
  • FIG. 7 is a flow chart showing a control method of a buffer hydraulic cylinder according to an embodiment of the present invention.
  • the core of the present invention is to provide a buffer hydraulic cylinder whose structural design can more reliably detect the position when the movement is in place or close to the position, thereby significantly improving the reliability of the work. Further, another core of the present invention is to provide a construction machine including the buffer hydraulic cylinder. Furthermore, another core of the present invention is to provide a control method for the above buffer hydraulic cylinder.
  • FIG. 1 is a schematic structural view of a buffer hydraulic cylinder according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a buffer hydraulic cylinder according to a second embodiment of the present invention
  • 3 is a schematic structural view of a buffer hydraulic cylinder in a third embodiment of the present invention.
  • the buffer body 13 is connected to the external oil passage only through the throttle passage; it should be noted that, firstly, only the rodless chamber 11 may be provided with a buffer device, and when the piston 3 is close to the compression limit position At the time, the buffer chamber 13 is formed in the rodless chamber 11; secondly, only the buffer chamber may be provided in the rod chamber 12, and when the piston 3 approaches the elongation limit position, in the rod chamber 12 A buffer chamber 13 is formed; thirdly, the rodless chamber 11 and the rod chamber 12 may each be provided with a buffer
  • the buffer cylinder further includes a pressure detecting member 4 for detecting the pressure in the buffer chamber 13, and a pressure detecting signal is issued according to the sudden increase in pressure of the buffer chamber 13.
  • the buffer cylinder When the buffer hydraulic rainbow is running close to the position (that is, close to the compression limit position or the extension limit position), the buffer cylinder enters the buffer zone, and at this time, the corresponding rodless chamber 11 of the buffer cylinder is present.
  • a buffer cavity 13 is formed in the rod cavity 12, and the buffer cavity 13 communicates with the external oil passage only through the throttle passage, so that the pressure in the buffer cavity 13 suddenly increases as the buffer hydraulic cylinder further moves.
  • the pressure detecting component 4 detects the sudden increase of the pressure, and sends a pressure detection signal, according to which the hydraulic pressure detection signal can be determined to be close to the position, and then the buffer Pressing the rainbow can perform reversing or other actions in time.
  • the present invention determines the position of the hydraulic cylinder based on the sudden increase of the pressure signal in the buffer chamber 13, the structural design is designed to avoid the outside world to a large extent relative to the structural design for position detection by optical signals or magnetic signals. The interference, so the reliability of the position detection is significantly improved, thereby improving the reliability of the buffer cylinder operation.
  • the structure of the buffer device is not limited, and the buffer device may be designed to include the spring 62 and the spring seat 61 shown in FIG. 1 to FIG. 3, and may also be the foregoing.
  • the structural design of the buffer plunger in the prior art of course, any other structure of the buffer device, as long as the piston can be operated close to the position, a buffer with a sudden increase in pressure is formed in the corresponding rodless cavity or the rod cavity.
  • the cavity should be within the scope of the present invention.
  • the buffer device comprises a spring seat 61 and a spring 62.
  • the spring seat 61 is disposed on the piston rod 2, and the spring 62 is disposed between the spring seat 61 and the piston 3.
  • the spring seat 61 closes the oil port at the end cover to form the buffer cavity 13; at the position of the spring seat 61 and between the spring seat 61 and the piston 3 Positioned on the side wall of the piston rod 2, at least one of the throttle grooves 63 gradually increasing in depth along the end cover, and at least one balance oil groove 64 is circumferentially opened;
  • the throttle channel is a throttle groove 63.
  • the throttle groove 63 Since the throttle groove 63 is opened, the high-pressure oil in the buffer cavity 13 can be discharged through the throttle groove 63, and since the throttle groove 63 gradually increases in groove depth as it approaches the end cap of the hydraulic cylinder, As the piston 3 moves further in the buffer chamber 13, the spring 62 is compressed, and the spring seat 61 moves toward the piston 3, so that the flow area of the throttle groove 63 is gradually reduced, so that the high pressure in the buffer chamber 13 The discharge flow rate of the oil is gradually reduced, thereby providing greater resistance to the piston 3, making it faster to reduce its speed.
  • the balance oil groove 64 is opened (the balance oil groove 64 is specifically an annular groove formed along the circumferential side wall of the piston rod 2), the spring seat 61 can be balanced to prevent vibration in the radial direction, and The hydraulic oil in the balance oil groove 64 can also lubricate the movement of the spring seat 61 on the side wall of the piston rod 2.
  • the buffer hydraulic cylinder may further include a control unit, the control unit receives the pressure detection signal, and issues an instruction of the cylinder reversal according to the signal.
  • the control unit receives the pressure detection signal, and issues an instruction of the cylinder reversal according to the signal.
  • the pressure change process in the buffer chamber 13 is: first increase, reach a peak, and then lower the process; at this time, one of the pressure drop processes can be taken
  • the value when the pressure detecting means 4 detects the pressure value, sends a pressure detecting signal to the control means, and based on the signal, the control means issues a command for commutation.
  • the control unit issues a reversing command, which is not limited in the present invention.
  • the control component receives the pressure detection signal
  • the pressure detection signal corresponds to a signal value
  • the control component determines whether the signal value is within a predetermined range value; when the signal value is less than the minimum value of the predetermined range value , indicating that the running speed of the hydraulic cylinder is too slow at this time, and at this time, the control unit issues an instruction to increase the corresponding rodless chamber 11 or the amount of oil entering the rod chamber 12, thereby causing the pressure value in the buffer chamber 13 Being within a predetermined range of values, thereby causing the operating speed of the hydraulic cylinder to be within a reasonable speed range; when the signal value is greater than the maximum value of the predetermined range value, the operating speed of the hydraulic cylinder is too fast.
  • control unit issues a command to reduce the corresponding rodless chamber 11 or the amount of oil entering the rod chamber 12, so that the pressure value in the buffer chamber 13 is within a predetermined range, thereby causing the operating speed of the hydraulic cylinder. Achieve a reasonable speed.
  • the predetermined range value can be obtained by a person skilled in the art according to common knowledge and routine experiment in the art; the predetermined range value corresponds to a reasonable operating speed range of a cylinder, and the detection is performed. If the arriving signal value is not within the predetermined range value, it indicates that the operating speed of the cylinder is too slow or too fast.
  • the buffer device is only disposed in the rod cavity 12, and the rod cavity 12 is formed with the buffer cavity 13; thus, when the signal value is less than
  • the control unit issues an instruction to increase the amount of oil entering the rodless chamber 11 when the minimum value of the predetermined range value is; when the signal value is greater than the maximum value of the predetermined range value, the control unit issues a subtraction The command for the amount of oil entering the small rodless chamber 11.
  • the structure of a buffer device can be specifically set.
  • the buffer hydraulic cylinder includes a first end cover 51 located on the side of the rod cavity 12, and the first end cover 51 is provided with a first oil port 51a communicating with the rod cavity 12, the throttle groove
  • the groove depth of 63 gradually increases toward the first end cover 51; on this basis, the piston 3 moves to the first end cover 51 -
  • the spring seat 61 closes the first port 51a to form the buffer cavity 13, and at this time, the hydraulic oil is returned to the oil through the throttle groove 63 provided on the piston rod 2.
  • the structural design can conveniently form the buffer cavity 13 in the rod cavity 12, and the structure is relatively simple, and the work reliability is high.
  • the buffer device is only disposed in the rodless cavity 11, and the rodless cavity 11 is formed with the buffer cavity 13; thus when the signal value is less than When the minimum value of the predetermined range value is reached, the control unit issues an instruction to increase the amount of oil entering the rod chamber 12; when the signal value is greater than the maximum value of the predetermined range value, the control unit issues a subtraction The command for the amount of oil entering the rod chamber 12 is small.
  • a buffer device structure can be specifically set.
  • the buffer hydraulic cylinder includes a second end cover 52 on one side of the rodless cavity 11, and the second end cover 52 is provided with a second oil port 52a communicating with the rodless cavity 11
  • the groove depth of the flow groove 63 gradually increases toward the first end cover 51.
  • the piston rod 2 is provided with a projection 21 which projects into the rodless cavity 11, and the spring
  • the seat 61 is disposed at an end of the protruding portion 21 away from the piston 3.
  • the spring 62 is disposed between the spring seat 61 and the piston 3.
  • the spring seat 61 closes the second oil port 52a.
  • the buffer chamber 13 is at this time, and the hydraulic oil in the buffer chamber 13 is returned to the oil through the throttle groove 63 provided on the piston rod 2.
  • the structural design can conveniently form the buffer cavity 13 in the rodless cavity 11, and the structure is relatively simple, and the work reliability is high.
  • both the rodless chamber 11 and the rod chamber 12 are provided with a cushioning device, so that when the piston 3 approaches the compression limit position, in the rodless chamber 11 Forming a buffer cavity 13; when the piston 3 is near the extension limit position, a buffer cavity 13 is formed in the rod cavity 12; in FIG. 3, there is a buffer device in the rod cavity 12 and a rodless cavity 11
  • the specific structure of the buffer device is the same as that of the buffer device in FIG. 1 and FIG. 2, and details are not described herein again.
  • the buffer hydraulic cylinder further includes a pressure measuring hole 14 communicating with the buffer cavity 13 , and the pressure measuring hole 14 .
  • the side wall of the cylinder tube 1 or the corresponding end cover may be specifically opened, and the pressure detecting member 4 is connected to the pressure measuring hole 14. This structural design facilitates the purpose of detecting pressure on the buffer chamber 13.
  • FIG. 4 is a schematic structural view of a buffer hydraulic cylinder according to a fourth embodiment of the present invention
  • FIG. 5 is a schematic structural view of a buffer hydraulic cylinder according to a fifth embodiment of the present invention
  • 6 is a schematic structural view of a buffer hydraulic cylinder in a sixth embodiment of the present invention.
  • the structure of the buffer device and the formation of the buffer cavity 13 can also be specifically designed.
  • the piston 3 when the piston 3 is moved to the end of the rodless chamber 11 side, the piston 3 blocks the oil port 73, and the rod chamber is formed therein.
  • the buffer chamber 13 and the hydraulic oil in the buffer chamber 13 flow out through the throttle valve 71. Meanwhile, in order to improve the safety performance, the buffer chamber 13 is connected to the relief valve 72.
  • the piston 3 is provided with a buffer plunger 74.
  • the buffer plunger 74 is inserted into the buffer cavity 13, thereby The buffer chamber 13 is clogged, and at this time, the hydraulic oil in the buffer chamber 13 flows out through the throttle valve 71.
  • the piston 3 is provided with a buffer plunger 74.
  • the buffer plunger 74 is inserted into the buffer cavity 13, Thereby, the buffer chamber 13 is blocked, and the buffer plunger 74 is provided with a throttle groove 63 as shown in FIGS. 1 to 3, and the hydraulic oil in the buffer chamber 13 flows out through the throttle groove 63.
  • the present invention provides a construction machine comprising a buffer hydraulic cylinder in any of the above-described technical solutions, and other parts of the construction machine can be referred to the prior art, and will not be developed herein.
  • FIG. 7 is a flow chart of a control method of a buffer hydraulic cylinder according to an embodiment of the present invention.
  • the position of the buffer cylinder is generally detected by an optical signal or a magnetic signal by a displacement sensor. Since the optical signal or the magnetic signal is susceptible to external interference, the detection method is not highly reliable.
  • the present invention provides a new method for detecting the position of a buffer hydraulic cylinder, comprising the following steps:
  • S11 detecting a sudden increase pressure of the buffer cavity 13 of the buffer hydraulic cylinder; when the hydraulic rainbow is moved to the buffer zone, the buffer cavity 13 is formed, and the high buffer cavity 13 is detected by the pressure detecting component 4.
  • S12 Determine the position of the piston 3 of the buffer hydraulic cylinder according to the sudden increase pressure, or adjust the oil supply amount of the buffer cylinder with the rod chamber 12 or the rodless chamber 11.
  • the control unit of the buffer cylinder receives the pressure detection signal, and based on the signal, it can be determined that the hydraulic cylinder is in a position close to the compression limit or the extension limit, and thus the hydraulic cylinder reversing command or other command can be issued.
  • the control unit issues an instruction to increase the amount of oil entering the rodless chamber 11 or the rod chamber 12;
  • the control unit issues an instruction to reduce the amount of oil entering the rodless chamber 11 or the rod chamber 12.
  • the above method of detecting the position of the hydraulic cylinder by the pressure signal has significantly improved the reliability of the position detection because the external disturbance is largely avoided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention porte sur un cylindre d'amortissement hydraulique, sur un procédé de commande de ce cylindre et sur une machine technique qui comprend le cylindre d'amortissement hydraulique. Une chambre côté sans tige (11) et/ou une chambre à tige (12) du cylindre d'amortissement hydraulique est/sont équipées d'un moyen d'amortissement et d'une chambre d'amortissement (13). La chambre d'amortissement (13) communique avec un trajet d'huile extérieur uniquement par un passage étranglé. Ledit cylindre d'amortissement hydraulique comprend aussi un élément de détection de pression destiné à détecter la pression régnant dans ladite chambre d'amortissement (13) et à envoyer le signal de pression détecté. Selon le signal détecté, le cylindre hydraulique peut envoyer une instruction pour faire reculer un piston ou ajuster la quantité d'huile fournie à ladite chambre sans tige (11) ou à ladite chambre à tige (12). La structure du cylindre d'amortissement hydraulique est conçue pour vérifier de manière fiable si le piston prend sa place ou une position proche de sa place.
PCT/CN2011/075660 2011-03-23 2011-06-13 Cylindre d'amortissement hydraulique, procédé de commande de ce cylindre et machine technique Ceased WO2012126207A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR112013012985A BR112013012985A2 (pt) 2011-03-23 2011-06-13 cilindro hidráulico de amortecimento, método de controle do mesmo, e máquina de engenharia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110070738.1 2011-03-23
CN 201110070738 CN102691695B (zh) 2011-03-23 2011-03-23 缓冲液压缸及其控制方法、工程机械

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WO2012126207A1 true WO2012126207A1 (fr) 2012-09-27

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PCT/CN2011/075660 Ceased WO2012126207A1 (fr) 2011-03-23 2011-06-13 Cylindre d'amortissement hydraulique, procédé de commande de ce cylindre et machine technique

Country Status (3)

Country Link
CN (1) CN102691695B (fr)
BR (1) BR112013012985A2 (fr)
WO (1) WO2012126207A1 (fr)

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CN108006007A (zh) * 2017-12-14 2018-05-08 中船重工中南装备有限责任公司 机械锁紧二级液压缸
CN110410384A (zh) * 2019-09-01 2019-11-05 宋彦宏 一种液压管路的来油测量指示仪及检测方法
CN110626997A (zh) * 2019-09-23 2019-12-31 合肥搬易通科技发展有限公司 一种对折式前移油缸
CN112879382A (zh) * 2021-03-15 2021-06-01 大连天重散装机械设备有限公司 液压油缸

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CN104121251A (zh) * 2014-07-17 2014-10-29 安徽易奇软件科技有限公司 一种液压缸缓冲装置
CN106286471B (zh) * 2015-05-20 2018-06-12 徐工集团工程机械股份有限公司 导向缓冲装置、液压油缸及挖掘机
CN109654085A (zh) * 2018-12-29 2019-04-19 武昌船舶重工集团有限公司 一种快速上浮脱险装置用气缸及其应用
CN109707784B (zh) * 2019-01-16 2024-02-23 大连富地重工机械制造有限公司 气动缓冲装置及方法
CN110259770B (zh) * 2019-06-03 2020-10-30 长沙中联重科环境产业有限公司 压缩式垃圾车压填系统及噪音控制方法
CN110470551B (zh) * 2019-09-04 2022-06-21 湖北文理学院 一种shpb试验装置及其发射装置和控制方法
CN111536099A (zh) * 2020-05-08 2020-08-14 三一重机有限公司 油缸缓冲压力控制方法、系统及挖掘机
CN114412885B (zh) * 2022-01-20 2022-12-27 中山大学·深圳 一种提高液压阀控缸系统机械柔顺性的方法及装置
CN115479062A (zh) * 2022-05-31 2022-12-16 西安昆仑工业（集团）有限责任公司 一种液压油缸用缓冲装置

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