CN116476886B - Gas-liquid buffer - Google Patents
Gas-liquid bufferInfo
- Publication number
- CN116476886B CN116476886B CN202310531353.3A CN202310531353A CN116476886B CN 116476886 B CN116476886 B CN 116476886B CN 202310531353 A CN202310531353 A CN 202310531353A CN 116476886 B CN116476886 B CN 116476886B
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- liquid
- gas
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- buffer
- oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G11/00—Buffers
- B61G11/12—Buffers with fluid springs or shock-absorbers; Combinations thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
本发明属于车钩缓冲技术领域，尤其涉及一种气液缓冲器；该气液缓冲器包括缸体、柱塞组件、节流件；缸体的封闭端的外周侧轴向连接有测量组件，所述测量组件包括测量管，所述测量管内部形成有第一容纳腔，所述第一容纳腔内设置有能够测量所述气液缓冲器位移的位移传感器、以及能够测量所述第一液腔内油液压力的压力传感器；气液缓冲器受压时，所述柱塞组件向所述封闭端移动，所述第一液腔体积减小，所述第一液腔内的油液进入所述第二液腔，所述压力传感器实时监测所述第一液腔内的油液的压力，所述位移传感器实时监测所述柱塞组件在压缩过程中的位移；可在不拆解气液缓冲器的情况下，判断气液缓冲器是否存在故障。
The present invention belongs to the technical field of coupler buffers, and in particular relates to a gas-liquid buffer; the gas-liquid buffer comprises a cylinder body, a plunger assembly, and a throttling member; a measuring assembly is axially connected to the outer peripheral side of the closed end of the cylinder body, the measuring assembly comprises a measuring tube, a first accommodating chamber is formed inside the measuring tube, a displacement sensor capable of measuring the displacement of the gas-liquid buffer, and a pressure sensor capable of measuring the oil pressure in the first liquid chamber are provided in the first accommodating chamber; when the gas-liquid buffer is pressurized, the plunger assembly moves toward the closed end, the volume of the first liquid chamber decreases, the oil in the first liquid chamber enters the second liquid chamber, the pressure sensor monitors the pressure of the oil in the first liquid chamber in real time, and the displacement sensor monitors the displacement of the plunger assembly during the compression process in real time; whether the gas-liquid buffer has a fault can be judged without disassembling the gas-liquid buffer.
Description
Technical Field
The invention belongs to the technical field of car coupler buffering, and particularly relates to a gas-liquid buffer.
Background
The coupler buffer is a vehicle component for interconnecting a vehicle with a vehicle, locomotive or motor car, transmitting traction, braking forces and mitigating longitudinal impact forces.
Coupler bumpers are used to mitigate longitudinal shock and vibration of a train in operation due to changes in locomotive traction or vehicle collisions during start-up, braking and shunting operations. The damper has a function of dissipating shock and vibration between vehicles, thereby reducing damage to the vehicle body structure and the loaded cargo. The working principle of the buffer is to alleviate the impact force by compressing the elastic element, and absorb the impact energy by friction and damping in the deformation process of the elastic element, and the types of the buffer currently include friction type buffer, clay type buffer and gas-liquid type buffer.
Common failures of gas-liquid bumpers are those that cause oil or gas leakage when the metal structure outside the bumpers is damaged, thereby significantly degrading the bumpers performance. Buffer damage can cause safety problems for personnel and vehicles, and it is therefore important that the buffer is in good condition.
The common physical quantity for detecting the state of the buffer is the displacement and the force of the buffer, the state of the buffer can be detected by detecting the displacement and the force of the buffer, the current detection of the gas-liquid buffer is usually carried out after the gas-liquid buffer is detached, the gas-liquid buffer is installed on a large-scale press, and the data of the buffer force and the displacement are read through the press. The mode is complex to operate, and waste of manpower and material resources is caused.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the gas-liquid buffer capable of monitoring the state of the buffer in real time on the premise of not disassembling the gas-liquid buffer.
The invention provides a gas-liquid buffer, comprising,
The cylinder body comprises a closed end and an open end along the axial direction;
the plunger assembly is divided into an air cavity and a second liquid cavity, part of the plunger assembly extends into the cylinder body from the opening end, a first liquid cavity is formed between the plunger assembly and the closed end, and the second liquid cavity is adjacent to the first liquid cavity and is communicated with the first liquid cavity;
A throttle member having one end fixed to the closed end of the cylinder and the other end extending into the cylinder in the axial direction of the cylinder;
Wherein, the
The measuring assembly comprises a measuring tube, a first accommodating cavity is formed in the measuring tube, and a displacement sensor capable of measuring the displacement of the gas-liquid buffer and a pressure sensor capable of measuring the pressure of the first liquid cavity are arranged in the first accommodating cavity;
When the gas-liquid buffer is pressed, the plunger assembly moves towards the closed end, the volume of the first liquid cavity is reduced, oil in the first liquid cavity enters the second liquid cavity, the pressure sensor monitors the pressure of the oil in the first liquid cavity in real time, and the displacement sensor monitors the displacement of the plunger assembly in the compression process in real time.
According to the technical scheme, the pressure sensor and the displacement sensor are integrated in the gas-liquid buffer, so that pressure data and displacement data can be output in real time in the working process of the gas-liquid buffer, and whether the gas-liquid buffer has faults can be judged under the condition that the gas-liquid buffer is not disassembled.
In some embodiments of the present application, the displacement sensor is a magneto displacement telescopic sensor, and includes a mounting seat, a measuring rod and a position magnetic ring, wherein the measuring rod is fixed on the mounting seat, the position magnetic ring can be sleeved on the outer peripheral side of the measuring rod and can move back and forth along the measuring rod, and the position magnetic ring and the measuring rod generate pulse signals to obtain displacement of the position magnetic ring;
the position magnetic ring is fixed at the end part of the plunger assembly positioned in the cylinder body, the plunger assembly moves, the position magnetic ring synchronously moves, the relative position of the position magnetic ring and the measuring rod changes along with the movement, and the displacement of the plunger assembly is measured.
In some embodiments of the application, the mounting seat of the displacement sensor is fixed at one end of the throttling element near the measuring tube, the throttling element is of a hollow tubular structure, and a second accommodating cavity capable of sealing the measuring rod is formed in the throttling element.
In some embodiments of the application, the plunger assembly comprises a plunger and an end cap assembly disposed at one end of the plunger, the end cap assembly and a portion of the plunger being positioned within the cylinder and movable along the interior of the cylinder when pressurized, a first fluid chamber being formed between the end cap assembly and the closed end of the cylinder.
In some embodiments of the present application, the end cap assembly includes an end cap seat for plugging the plunger, a pressure increasing valve is disposed on the end cap seat, and oil in the first liquid chamber enters the second liquid chamber through the pressure increasing valve;
when the gas-liquid buffer is pressed, the throttling piece can enter the extending part and form an annular throttling gap with the extending part, dynamic damping force is provided for compression of the gas-liquid buffer, an oil liquid circulation channel is limited, the resistance is further increased, and the damping force of the gas-liquid buffer is further increased.
In some embodiments of the present application, the position magnetic ring is fixed on the end surface of the end cover seat located in the first liquid cavity, when the gas-liquid buffer is pressed, the end cover seat drives the position magnetic ring to move synchronously, the throttling element passes through the position magnetic ring on the end cover seat and enters the extension part, and the position magnetic ring and the measuring rod in the throttling element generate pulse signals to obtain displacement of the position magnetic ring.
In some embodiments of the present application, a check valve is disposed at an end of the extension portion, and after the external compression load is removed, the high-pressure gas in the air chamber will press the oil in the second liquid chamber to flow back to the first liquid chamber through the check valve, the volume of the first liquid chamber increases, and the plunger assembly gradually returns to and exits from the cylinder body.
In some embodiments of the present application, in order to prevent the cylinder from interfering the pulse signal generated between the measuring rod and the position magnetic ring, and affecting the measurement accuracy of the displacement sensor, a magnetism isolating ring is disposed between the position magnetic ring and the end cover seat, and when the gas-liquid buffer is pressed, the throttling element sequentially passes through the position magnetic ring and the magnetism isolating ring, and then enters the extension part.
In some embodiments of the present application, the closed end is axially provided with an oil channel, and the oil in the first liquid cavity enters the pressure sensor through the oil channel, and after the pressure sensor measures the pressure of the oil, pressure data is transmitted to the data acquisition controller.
In some embodiments of the present application, a data acquisition controller is further disposed in the first accommodating cavity, and the data acquisition controller is configured to receive data of the displacement sensor and the pressure sensor, and perform data conversion and processing;
The outside of survey buret is provided with data interface, data acquisition controller with data interface connects, data interface is used for with data that data acquisition controller handled are received and reprocessed.
Based on the technical scheme, the embodiment of the invention can output pressure data and displacement data in real time in the working process of the gas-liquid buffer by integrating the pressure sensor and the displacement sensor in the gas-liquid buffer, can judge whether the gas-liquid buffer has faults or not under the condition of not disassembling the gas-liquid buffer, saves manpower and material resources, reduces maintenance cost and provides a new idea for the intellectualization and modularization of the coupler;
The integrated design thought is adopted, the displacement sensor and the pressure sensor are packaged in the gas-liquid buffer assembly, and the data acquisition controller processes the acquired data of the displacement sensor and the pressure sensor and outputs the processed data to the data interface, so that the data is convenient to receive.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a cross-sectional view of a gas-liquid damper according to one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the displacement sensor, throttle member of the embodiment of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the end cap assembly of the embodiment of FIG. 1;
FIG. 4 is a schematic perspective view of a booster valve according to an embodiment of the present invention;
Fig. 5 is a schematic perspective view of a gas-liquid buffer according to the embodiment shown in fig. 1.
In the figure:
10. Cylinder block, 11, closed end, 111, oil liquid channel, 12, open end, 13, first liquid cavity, 20, plunger assembly, 21, plunger, 22, end cover assembly, 221, end cover seat, 2211, through hole, 222, pressurizing valve, 223, extension part, 2231, one-way valve, 23, oil gas isolation piston, 24, second liquid cavity, 25, air cavity, 30, throttling piece, 31, second containing cavity, 40, measuring tube, 41, first containing cavity, 42, displacement sensor, 421, mounting seat, 422, measuring rod, 423, position magnetic ring, 424, magnetism isolating ring, 43, pressure sensor, 44, data acquisition controller, 45, data interface.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. 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 understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in 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.
The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of 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.
As shown in fig. 1-2, a gas-liquid buffer, as one embodiment of the present invention, includes,
The cylinder body 10 comprises a closed end 11 and an open end 12 along the axial direction, is a high-pressure container and is internally provided with oil;
The plunger assembly 20 comprises a plunger 21 and an end cover assembly 22, wherein the plunger 21 is inserted into the cylinder 10 from the opening end 12, the end cover assembly 22 is arranged at a port position where the plunger 21 is inserted into the cylinder 10, a first liquid cavity 13 is formed between the end cover assembly 22 and the closed end 11 of the cylinder 10, and in the embodiment, the first liquid cavity 13 is a high-pressure oil cavity;
The oil-gas separation piston 23 is arranged inside the plunger 21 and can move along the axial direction of the plunger 21, and divides the interior of the plunger into a second liquid cavity 24 communicated with the first liquid cavity 13 and an air cavity 25, wherein in the embodiment, the second liquid cavity 24 is a low-pressure oil cavity;
When the gas-liquid buffer is pressed, the plunger assembly 20 moves towards the closed end 11, the volume of the first liquid cavity 13 is reduced, oil enters the second liquid cavity 24 from the first liquid cavity 13 through the end cover assembly 22, the oil in the second liquid cavity 24 pushes the oil-gas separation piston to move towards the air cavity 25, the volume of the air cavity 25 is compressed, when the stroke of the gas-liquid buffer is increased to the condition that the throttling element 30 and the end cover assembly 22 form an annular throttling gap, fluid damping force is generated, the passage of the oil entering the second liquid cavity 24 from the first liquid cavity 13 is further limited, and the damping force of the gas-liquid buffer is further increased;
The outside axial connection of blind end 11 of cylinder body 10 has the measuring subassembly, and the cylinder body 10 bears the tensile pressure of measuring the subassembly transmission, and the measuring subassembly includes measuring pipe 40, and measuring pipe 40 inside is formed with first accommodation chamber 41, is provided with displacement sensor 42, pressure sensor 43 in the first accommodation chamber 41, and displacement sensor 42 is used for detecting the displacement of plunger subassembly 20 of gas-liquid buffer when compressing, and pressure sensor 43 is used for detecting the pressure value in the first liquid chamber 13 that is the high-pressure oil pocket.
In this embodiment, by integrating the pressure sensor and the displacement sensor inside the gas-liquid buffer, pressure data and displacement data can be output in real time during the working process of the gas-liquid buffer, and whether the gas-liquid buffer has a fault can be determined without disassembling the gas-liquid buffer.
As shown in fig. 1, a data acquisition controller 44 is further disposed in the first accommodating cavity 41, the data acquisition controller 44 is connected with the displacement sensor 42 and the pressure sensor 43 through data lines, the data acquisition controller 44 is used for receiving displacement data of the plunger assembly measured by the displacement sensor 42 and pressure data of the first liquid cavity 13 monitored by the pressure sensor 43, and converting and processing corresponding data, specifically, the data acquisition controller 44 receives real-time displacement data monitored by the displacement sensor 42, meanwhile, the pressure value monitored by the received pressure sensor 43 is calculated, multiplication of the pressure value and the inner end surface area of the high first liquid cavity 12 is achieved, namely, the external pressure of the gas-liquid buffer is achieved, a data interface 45 is disposed outside the measuring tube 40, the data acquisition controller 44 is connected with the data interface 45 through data lines, and the data interface 45 is used for receiving and reprocessing the displacement and pressure data processed by the data acquisition controller 44.
In this embodiment, as shown in fig. 2, the displacement sensor 42 is a magneto-induced displacement telescopic sensor, and includes a mounting seat 421, a measuring rod 422 and a position magnetic ring 423, a waveguide wire is disposed in the measuring rod 422, the position magnetic ring 423 can be sleeved outside the measuring rod 422, the measuring rod 422 is fixed on the mounting seat 421, the position magnetic ring 423 can be sleeved on the outer peripheral side of the measuring rod 422 and can slide back and forth along the measuring rod 422, and the position magnetic ring 423 and the measuring rod 422 generate a pulse signal.
With continued reference to fig. 2, the throttling element 30 is of a hollow tubular structure, a second accommodating cavity 31 capable of accommodating a measuring rod 422 of a displacement sensor 42 is formed in the throttling element 30, the displacement sensor is integrated with the throttling element 30, the displacement change of the gas-liquid buffer is sensed through the movement of the plunger, one end of the throttling element 30 fixed on the cylinder body 10 is provided with an opening, one end of the throttling element extending into the cylinder body 10 is sealed, the measuring rod 422 is sealed in the second accommodating cavity 31, and the measuring precision is high, and is not influenced by external environment.
In this embodiment, the gas-liquid buffer is pressurized, the plunger assembly 20 is displaced, the throttling element 30 and the end cover assembly 22 form an annular throttling gap, wherein the end cover assembly 22 comprises
An end cover seat 221 which is fixed at one end of the plunger 21 positioned in the cylinder 10 through threads, a through hole 2211 is formed in the center of the end cover seat 221, and the through hole 2211 is a flow passage of the first liquid cavity 13 and the second liquid cavity 22;
The pressure increasing valve 222, one end of which is fixed on the through hole 2211 of the end cover seat 221, the inlet of the pressure increasing valve 222 is positioned in the first liquid cavity 13, the oil in the first liquid cavity 13 enters the second liquid cavity 24 through the pressure increasing valve 222, the pressure increasing valve 222 amplifies the pressure multiple of the oil in the second liquid cavity 22;
As shown in fig. 4, the booster valve 222 further has an extension portion 223, which is a hollow tubular structure, and is formed by extending an inlet of the booster valve 222 toward the second liquid chamber 24 along an axial direction, and the length of the extension portion 223 is adapted to the length of the throttle member 30, in this embodiment, the length of the throttle member 30 is adapted to the length of the measuring rod 422 of the position sensor 42, the length of the extension portion 223 is adapted to the length of the throttle member 30, the length of the throttle member 30 and the length of the extension portion 223 are adapted to the length of the measuring rod 422 of the displacement sensor, and the throttle member 30 and the extension portion 223 are hollow structures, so as to ensure the installation and measurement accuracy of the displacement sensor;
When the gas-liquid buffer is pressed, the throttling element 30 enters the extension part 223 through the through hole 2211 and forms an annular throttling gap with the through hole 2211, a dynamic damping effect is provided for the buffer under the compression working condition, an oil liquid flowing channel is limited, the resistance is further increased, the damping force of the gas-liquid buffer is further increased, and the oil liquid in the first liquid cavity 13 enters the booster valve 222 through the annular throttling gap and then enters the second liquid cavity 24.
The end of the extension part 223 is provided with a check valve 2231, after the external compression load is removed, the high-pressure gas in the air cavity 25 will press the oil-gas isolation piston 23 to move reversely, the volume of the second liquid cavity 24 becomes smaller, the oil in the second liquid cavity 24 flows to the first liquid cavity 13 through the check valve 2231 at the end of the extension part 223, the volume of the first liquid cavity 13 increases, and the plunger assembly 20 gradually returns and withdraws from the cylinder body 10. The one-way valve 2231 is provided to ensure that the oil fluid is allowed to circulate in one direction from the second fluid chamber 24 to the first fluid chamber 13 when the external force is removed.
The position magnetic ring 423 of the magnetic displacement telescopic sensor is fixed on the end face of the end cover seat 221, which is positioned on the first liquid cavity 13, through bolts, when the gas-liquid buffer is pressed, the plunger 21 and the end cover assembly 22 move towards the closed end 11, the end cover seat 221 drives the position magnetic ring 423 to synchronously move, the initial position of the throttle element 30 is positioned at the inlet position of the booster valve 222, when the plunger 21 is pressed and moves, the throttle element 30 passes through the position magnetic ring 423 and enters the extension part 223, the position magnetic ring 423 and the waveguide wire in the measuring rod 422 in the throttle element 30 generate pulse signals, and the displacement of the position magnetic ring 423 is obtained, namely the displacement of the plunger assembly 20 is obtained.
In this embodiment, in order to prevent the cylinder 10 from interfering the pulse signal generated between the measuring rod 422 and the position magnetic ring 423 and affecting the measurement accuracy of the displacement sensor 42, a magnetism isolating ring 424 is disposed between the position magnetic ring 423 and the end cap seat 221, the magnetism isolating ring 424 is made of a non-metal material, and when the gas-liquid buffer is pressed, the throttling member 30 sequentially passes through the position magnetic ring 423 and the magnetism isolating ring 424 and then enters the extension portion 223.
In order to enable the pressure sensor 43 to directly measure the pressure of the oil in the first liquid cavity 13, the closed end 11 is axially provided with an oil channel 111, the oil in the first liquid cavity 13 enters the pressure sensor 43 through the oil channel 111, after the pressure sensor 43 measures the pressure of the oil, pressure data are transmitted to the data acquisition controller 44, the data acquisition controller 44 calculates the pressure value monitored by the received pressure sensor 43, and the pressure value is multiplied by the area of the inner end surface of the first liquid cavity 13, namely the external pressure applied to the gas-liquid buffer.
As shown in fig. 1, when the gas-liquid buffer of this embodiment is subjected to dynamic impact compression, the plunger 21 moves along the direction from the cylinder 10 to the closed end 11, the oil in the first liquid chamber 13 enters the second liquid chamber 24 through the booster valve 222, the gap oil between the booster valve 222 and the through hole 2211 of the end cover seat 221 generates a buffer damping force, when the gas-liquid buffer is compressed under pressure, the throttling member 30 gradually enters the through hole 2211 of the end cover seat 221, the throttling member 30 and the through hole 2211 form an annular throttling gap, the oil circulation channel is further limited, the resistance of the oil is further increased, the buffer damping force is further increased, and when the oil is pressed into the second liquid chamber 24 from the first liquid chamber 13, the oil in the second liquid chamber 24 pushes the volume of the oil-gas isolating piston 23 to compress the air chamber 25, and the larger the compression stroke of the gas chamber 25 is compressed, and the larger the pressure of the air chamber 25 is reacted with the pressure of the oil-gas isolating piston 23. When the external compression load applied on the gas-liquid buffer is removed, the high-pressure gas in the gas cavity 25 presses the oil-gas isolation piston 23 to move in the opposite direction, the volume of the second liquid cavity 24 is compressed, the oil flows to the first liquid cavity 13 through the one-way valve 2231, the volume of the first liquid cavity 13 is increased, the gas-liquid buffer is gradually recovered, the plunger 21 is withdrawn from the cylinder body 10 for reset, during the stress action of the gas-liquid buffer, the displacement sensor 42 monitors the displacement stroke of the plunger 21 in real time, the pressure sensor 43 monitors the pressure value of the oil in the first liquid cavity 13, and the data acquisition controller 44 receives the data of the displacement sensor 42 and the pressure sensor 43, and after the data are converted, the external equipment is connected with the data interface 45 to output the real-time displacement and resistance data of the gas-liquid buffer.
In this embodiment, one end of a measuring tube 41 is connected with a cylinder 10 through threads, the other end of the measuring tube is connected with an external structure, a groove is arranged on the outer wall of a plunger 21, an oil sealing ring is arranged in the groove, the plunger is arranged in an inner cavity of the cylinder 10 to form a sealing cavity, an end cover seat 221 is connected with the plunger 21 through threads, a throttling element 30 is fixed on a sealing end 11 of the cylinder 10 through threads, a mounting seat 421 of a displacement sensor 42 is connected with the throttling element 30 through threads, a pressure sensor 43 is connected with a closed end 11 of the cylinder 10 through threads, a data acquisition controller 44 is fixed in the first accommodating cavity 41 through bolts, and a data interface 45 is fixed on the measuring tube 40 through bolts.
According to the embodiment, the pressure sensor and the displacement sensor are integrated in the gas-liquid buffer, so that pressure data and displacement data can be output in real time in the working process of the gas-liquid buffer, and whether the gas-liquid buffer has faults or not can be judged under the condition that the gas-liquid buffer is not disassembled, so that manpower and material resources are saved, the maintenance cost is reduced, and a new idea is provided for the intellectualization and modularization of the coupler;
The integrated design thought is adopted, the displacement sensor and the pressure sensor are packaged in the gas-liquid buffer assembly, and the data acquisition controller processes the acquired data of the displacement sensor and the pressure sensor and outputs the processed data to the data interface, so that the data is convenient to receive.
Finally, it should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are only required to be mutually referred.
The foregoing embodiments are only for illustrating the technical scheme of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention may be modified or parts of technical features may be equivalently replaced without departing from the spirit of the technical scheme of the present invention, and the scope of the technical scheme of the present invention is covered by the claims.
Claims (9)
1. A gas-liquid buffer, comprising:
the cylinder body comprises a closed end and an open end along the axial direction;
the plunger assembly is divided into an air cavity and a second liquid cavity, part of the plunger assembly extends into the cylinder body from the opening end, a first liquid cavity is formed between the plunger assembly and the closed end, and the second liquid cavity is adjacent to the first liquid cavity and is communicated with the first liquid cavity;
A throttle member having one end fixed to the closed end of the cylinder and the other end extending into the cylinder in the axial direction of the cylinder;
Wherein, the
The measuring assembly comprises a measuring tube, a first accommodating cavity is formed in the measuring tube, and a displacement sensor capable of measuring the displacement of the gas-liquid buffer and a pressure sensor capable of measuring the pressure of the first liquid cavity are arranged in the first accommodating cavity;
When the gas-liquid buffer is pressed, the plunger assembly moves towards the closed end, the volume of the first liquid cavity is reduced, the oil in the first liquid cavity enters the second liquid cavity, the pressure sensor monitors the pressure of the oil in the first liquid cavity in real time, and the displacement sensor monitors the displacement of the plunger assembly in the compression process in real time;
The displacement sensor is a magneto displacement telescopic sensor and comprises a mounting seat, a measuring rod and a position magnetic ring, wherein the measuring rod is fixed on the mounting seat, the position magnetic ring can be sleeved on the outer peripheral side of the measuring rod and can slide back and forth along the measuring rod, and the position magnetic ring and the measuring rod generate pulse signals;
the throttling element is of a hollow tubular structure, a second accommodating cavity capable of accommodating a measuring rod of a displacement sensor is formed in the throttling element, the displacement sensor is integrated with the throttling element, and displacement change of the gas-liquid buffer is sensed through movement of the plunger;
the plunger assembly comprises a plunger and an end cover assembly arranged at one end of the plunger, the end cover assembly comprises an end cover seat for sealing the plunger, a pressure increasing valve is arranged on the end cover seat, and oil in the first liquid cavity enters the second liquid cavity through the pressure increasing valve;
The pressure increasing valve is provided with an extension part which is of a hollow tubular structure and is formed by extending an inlet of the pressure increasing valve to the second liquid cavity along the axial direction, and the length of the extension part is matched with the length of the throttling piece;
when the gas-liquid buffer is pressed, the throttling element enters the extension part through the through hole and forms an annular throttling gap with the through hole, a dynamic damping effect is provided for the buffer under the compression working condition, an oil liquid flowing channel is limited, the resistance is further increased, the damping force of the gas-liquid buffer is further increased, and oil liquid in the first liquid cavity enters the booster valve through the annular throttling gap and then enters the second liquid cavity.
2. The gas-liquid damper according to claim 1, wherein the position magnet ring is fixed at an end of the plunger assembly located in the cylinder, the plunger assembly moves, the position magnet ring moves synchronously, the relative position of the position magnet ring and the measuring rod changes, and the displacement of the plunger assembly is measured.
3. The gas-liquid damper according to claim 2, wherein the mounting seat of the displacement sensor is fixed at one end of the throttle member near the measuring pipe, the throttle member is of a hollow tubular structure, and a second accommodation chamber capable of closing the measuring rod is formed inside the throttle member.
4. A gas-liquid damper as recited in claim 1, wherein said end cap assembly and a portion of said plunger are positioned within said cylinder and are movable along the interior of said cylinder when pressurized, said end cap assembly and said closed end of said cylinder defining a first liquid chamber therebetween.
5. The gas-liquid buffer according to claim 1, wherein the position magnetic ring is fixed on the end face of the end cover seat located in the first liquid cavity, when the gas-liquid buffer is pressed, the end cover seat drives the position magnetic ring to move synchronously, the throttling element passes through the position magnetic ring on the end cover seat and enters the extension part, and the position magnetic ring and the measuring rod in the throttling element generate pulse signals to obtain displacement of the position magnetic ring.
6. The gas-liquid damper according to claim 1, wherein the end of the extension portion is provided with a check valve, and the high-pressure gas in the gas chamber will press the oil in the second liquid chamber to flow back to the first liquid chamber through the check valve after the external compression load is removed.
7. The gas-liquid buffer according to claim 1, wherein a magnetism isolating ring for isolating the interference of an external magnetic field is arranged between the position magnetic ring and the end cover seat, and when the gas-liquid buffer is pressed, the throttling piece sequentially passes through the position magnetic ring and the magnetism isolating ring and then enters the extension part.
8. The gas-liquid buffer according to claim 1, wherein the closed end is axially provided with an oil passage, and oil in the first liquid chamber enters the pressure sensor through the oil passage, and the pressure sensor measures the pressure in the first liquid chamber.
9. The gas-liquid buffer according to claim 1, wherein a data acquisition controller is further arranged in the first accommodating cavity, and the data acquisition controller is used for receiving data of the displacement sensor and the pressure sensor and converting and processing the data;
The outside of survey buret is provided with data interface, data acquisition controller with data interface connects, data interface is used for with data that data acquisition controller handled are received and reprocessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310531353.3A CN116476886B (en) | 2023-05-11 | 2023-05-11 | Gas-liquid buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310531353.3A CN116476886B (en) | 2023-05-11 | 2023-05-11 | Gas-liquid buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116476886A CN116476886A (en) | 2023-07-25 |
| CN116476886B true CN116476886B (en) | 2025-09-09 |
Family
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| CN111022550A (en) * | 2019-12-17 | 2020-04-17 | 徐州徐工液压件有限公司 | Independent hydro-pneumatic suspension with detection device |
| CN111396490A (en) * | 2020-05-19 | 2020-07-10 | 辽宁清原第一缓冲器制造有限公司 | Gas-liquid buffer |
| CN115949692A (en) * | 2022-12-28 | 2023-04-11 | 湖北三江航天万山特种车辆有限公司 | Two-stage telescopic system |
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| JPH0632130A (en) * | 1992-07-17 | 1994-02-08 | Fuji Heavy Ind Ltd | Suspension control device for vehicle |
| WO2009073810A2 (en) * | 2007-12-05 | 2009-06-11 | Pacific Scientific Company | Snubber valve |
| CN101639106B (en) * | 2009-08-25 | 2011-05-11 | 深圳市中车业成实业有限公司 | Piston-type hydro-pneumatic buffer |
| CN210715706U (en) * | 2019-07-22 | 2020-06-09 | 成都博仕腾科技有限公司 | Variable damping semi-active oil pressure shock absorber with measurable damping displacement speed |
| CN212447589U (en) * | 2020-06-12 | 2021-02-02 | 中车长春轨道客车股份有限公司 | Integrated car coupler energy absorption device |
| JP7506594B2 (en) * | 2020-12-21 | 2024-06-26 | カヤバモーターサイクルサスペンション株式会社 | Vehicle shock absorbers and suspension systems |
| CN113968257B (en) * | 2021-12-01 | 2023-04-07 | 中车制动系统有限公司 | Vehicle end buffering energy-absorbing device |
| CN114135615B (en) * | 2021-12-01 | 2023-11-21 | 中车制动系统有限公司 | Gas-liquid buffering energy-absorbing device |
| CN115539553B (en) * | 2022-08-31 | 2025-07-29 | 东风专用零部件有限公司 | Hydro-pneumatic spring assembly |
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| CN206141569U (en) * | 2015-12-29 | 2017-05-03 | 德尔纳阻尼器公司 | A reactive inhibition hydraulic damper for train coupling |
| CN111022550A (en) * | 2019-12-17 | 2020-04-17 | 徐州徐工液压件有限公司 | Independent hydro-pneumatic suspension with detection device |
| CN111396490A (en) * | 2020-05-19 | 2020-07-10 | 辽宁清原第一缓冲器制造有限公司 | Gas-liquid buffer |
| CN115949692A (en) * | 2022-12-28 | 2023-04-11 | 湖北三江航天万山特种车辆有限公司 | Two-stage telescopic system |
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