CN110513431B - Magnetoelectric hybrid suspension type hydraulic damper - Google Patents

Magnetoelectric hybrid suspension type hydraulic damper Download PDF

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Publication number
CN110513431B
CN110513431B CN201910834748.4A CN201910834748A CN110513431B CN 110513431 B CN110513431 B CN 110513431B CN 201910834748 A CN201910834748 A CN 201910834748A CN 110513431 B CN110513431 B CN 110513431B
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China
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inner cylinder
piston rod
cylinder
piston head
damping
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CN110513431A (en
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胡坤
张志远
王爽
郭永存
周军鹏
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention belongs to the field of hydraulic dampers, and particularly relates to a magnetoelectric hybrid suspension type hydraulic damper which comprises a piston rod, an inner cylinder, an outer cylinder and a damping control valve, wherein the piston rod is connected with the inner cylinder; an inner cylinder is sleeved in the outer cylinder, and the outer cylinder is fixedly connected with the inner cylinder through a cylinder cover; a piston head is connected in the inner cylinder in a sliding manner, and a piston rod is arranged at one end of the piston head; hydraulic oil is injected into the inner cylinder and the outer cylinder; the bottom of the inner cylinder is communicated with the outer cylinder through a flow limiting hole and a damping control valve, and the damping control valve is controlled by a controller; according to the invention, after the displacement detected by the displacement sensor is detected, the adjusting valve core of the damping control valve is controlled by the controller, so that the repeated flowing speed of hydraulic oil in the damper in the inner cylinder and the outer cylinder is controlled, the effect of adjustable damping can be achieved, the rigidity and the damping of the hydraulic damper can be adjusted in real time within one millisecond according to the position, and the effect of rapid shock absorption is achieved.

Description

Magnetoelectric hybrid suspension type hydraulic damper
Technical Field
The invention belongs to the field of hydraulic dampers, and particularly relates to a magnetoelectric hybrid suspension type hydraulic damper.
Background
The damper is used as a device for providing motion damping and reducing motion energy, and is widely applied to the fields of automobiles, aerospace and the like. Common dampers include hydraulic dampers, air dampers, electromagnetic dampers and the like, and although the dampers can adjust the damping effect, the dampers cannot achieve the effect of simultaneously adjusting the rigidity and the damping, so that the application range has certain limitation.
A magnetoelectric mixed suspension type hydraulic damper is based on the electromagnetic principle, and a magnetoelectric mixed suspension structure is added into the hydraulic damper for the first time. After the electromagnet is switched on, the direction and the magnitude of the current are changed to change the magnetic pole and the magnetic strength of the electromagnet, and the stiffness of the hydraulic damper can be adjusted by continuously adjusting the acting force between the electromagnet and the permanent magnet. When the electromagnet vibrates, hydraulic oil in the damper is acted by pressure to flow repeatedly in the inner cylinder and the outer cylinder, damping force can be generated when the hydraulic oil passes through the damping control valve, and the effect of adjustable damping can be achieved by adjusting the valve core. The structure overcomes the limitation of single control, can simultaneously adjust the rigidity and the damping according to the condition, and greatly improves the adjustability and the adaptability of the system.
Disclosure of Invention
The invention provides a magnetoelectric hybrid suspension type hydraulic damper, which aims to make up for the defects of the prior art and solve the problem that the common dampers comprise a hydraulic damper, an air damper and an electromagnetic damper, and the dampers can adjust the damping but cannot achieve the effect of simultaneously adjusting the rigidity and the damping.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a magnetoelectric hybrid suspension type hydraulic damper which comprises an upper support, a piston rod, an outer sealing ring, a cylinder cover, an inner cylinder, an outer cylinder, a damping control valve and a lower support, wherein the upper support is provided with a support base; an inner cylinder is sleeved in the outer cylinder, and the outer cylinder is fixedly connected with the inner cylinder through a cylinder cover; a piston head is connected in the inner cylinder in a sliding manner, and a piston rod is arranged at one end of the piston head; one end of the piston rod, which is far away from the piston head, is fixedly connected with an upper support, and the upper support is sleeved on the vehicle body; the bottom of the outer cylinder is provided with a lower support which is sleeved on the wheel; the outer sealing ring is positioned between the cylinder cover and the piston rod, and hydraulic oil is injected into the inner cylinder and the outer cylinder; the bottom of the inner cylinder is communicated with the outer cylinder through a flow limiting hole and a damping control valve, and the damping control valve is controlled by a controller; when the piston rod moves, hydraulic oil can flow in the inner cylinder and the outer cylinder through the damping control valve and can provide damping force when passing through a damping hole in the damping control valve; a fixed frame is fixedly connected on the piston rod between the upper support and the cylinder cover; one side of the outer cylinder is provided with a suspension fixedly connected with the frame, and the suspension is connected with the fixed frame through a connecting rod; a displacement sensor is fixedly connected to the suspension and is electrically connected with the controller through an electric wire; the vehicle is traveling on the road surface, the automobile body is connected to the attenuator upper bracket, the wheel is connected to the undersetting, when the automobile body takes place to vibrate, piston rod and piston head reciprocating sliding in the inner cylinder, hydraulic oil in the attenuator receives the pressure effect and flows in inner cylinder and outer cylinder repeatedly, can produce the damping force when passing through the damping control valve, the regulation case can reach damping adjustable effect, attenuator rigidity and damping can be adjusted in real time in the millisecond according to the displacement that displacement sensor detected, reach quick absorbing effect.
Preferably, the piston head is provided with an electromagnet, the electromagnet is connected with the controller and the power supply through a lead in the upper end of the piston rod, the electromagnet is magnetic when being electrified, and the magnetic pole and strength of the magnetism can be changed by changing the current magnitude and direction; an inner sealing ring is arranged between the electromagnet and the piston rod; the bottom of the inner cylinder is fixedly connected with a permanent magnet, and the middle of the inner cylinder is provided with a hole so as to facilitate the flow of hydraulic oil; a group of springs are arranged between the piston head and the permanent magnet and are used for playing a role in buffering when power is off; the piston head is manufactured in sections and connected through bolts, a piston rod connected to an upper support can drive an electromagnet to vibrate, a displacement sensor is used for sensing the vibration direction of the piston rod, when the piston rod and the electromagnet vibrate upwards, according to the electromagnetic principle, a permanent magnet positioned below the electromagnet needs to generate attraction force to inhibit vibration, the direction of current introduced into an electromagnet coil is adjusted, the magnetic poles of opposite surfaces of the electromagnet and the permanent magnet are opposite, the larger the vibration displacement is, the larger the current is introduced, and the trend of upward vibration of the piston rod and the electromagnet is inhibited by adjusting the size of the electromagnetic attraction force; when the piston rod and the electromagnet vibrate downwards, the permanent magnet needs to generate repulsive force to inhibit vibration, the direction of current introduced into the electromagnet coil is adjusted to enable the magnetic poles of opposite surfaces of the electromagnet and the permanent magnet to be the same, the larger the vibration displacement is, the larger the current is introduced, the trend that the piston rod and the electromagnet vibrate downwards is inhibited by adjusting the magnitude of the electromagnetic repulsive force, the effect of adjustable rigidity is achieved, and a spring positioned between the piston head and the permanent magnet can play a role of buffering when the power is cut off.
Preferably, the piston rod is connected with the piston head in a sliding manner, and a group of sliding holes are formed in the piston head; the piston rod moves downwards, the supporting block is pushed out towards the direction close to the inner wall of the inner cylinder through the connecting rod, and the friction force between the piston head and the inner cylinder is increased; when the wheels drive the lower support and further drive the piston rod to move downwards, the piston rod pushes the connecting rod, the supporting block is further pushed out towards the direction close to the inner wall of the inner cylinder, the supporting block is in contact with the inner cylinder and then compresses the inner wall of the inner cylinder, the friction force between the inner cylinder and the supporting block is increased, and the friction force between the piston head and the inner cylinder is increased, so that the movement resistance of the piston rod is further increased, and a good earthquake considering effect is achieved.
Preferably, one end of the supporting block, which is close to the inner wall of the inner cylinder, is provided with a group of grooves, rubber bowls are fixedly connected in the grooves, and the rubber bowls are used for sucking the inner wall of the inner cylinder when the piston head slides upwards; when the piston rod moves downwards, the rubber bowl is tightly attached to the inner cylinder, the friction force between the piston head and the inner cylinder is increased, when the piston rod moves upwards, the piston rod drives the connecting rod and the supporting rod to move towards the direction far away from the inner wall of the inner cylinder, at the moment, the opening of the rubber bowl and the inner wall of the inner cylinder form a negative pressure cavity, the rubber bowl is sucked on the inner wall of the inner cylinder, the upward movement resistance of the piston rod is increased, and the damping effect of the damper is further increased.
Preferably, one end of the piston head, which is far away from the piston rod, is fixedly connected with a push rod, and the diameter of the push rod is smaller than that of the flow limiting hole; a group of elastic oil control rings are arranged on the part of the push rod close to the flow limiting hole, the diameter of each oil control ring is slightly larger than that of the flow limiting hole, and the distance between every two adjacent oil control rings is larger than the depth of the flow limiting hole; an arc chamfer is arranged on the upper edge of the flow limiting hole; when the oil control ring enters the flow limiting hole along with the push rod, the movement resistance of the piston rod is increased; when the piston head moves downwards to be close to the bottom of the inner cylinder, the push rod is inserted into the flow limiting hole, the flow of hydraulic oil in the flow limiting hole is further reduced, the reaction force of the hydraulic oil in the inner cylinder to the piston head is increased, the piston head is prevented from contacting the bottom due to rapid movement of the piston head, the piston head and the permanent magnet are prevented from being damaged, when the push rod is continuously inserted into the flow limiting hole, the oil control ring is embedded into the flow limiting hole, the reaction force of the hydraulic oil in the inner cylinder to the piston head is further increased, meanwhile, the distance between adjacent oil control rings is larger than the depth of the flow limiting hole, after the lower oil control ring penetrates through the flow limiting hole, the hydraulic oil in the inner cylinder can continuously flow into the outer cylinder through the flow limiting hole, the oil control ring is matched with the flow limiting hole, the hydraulic oil intermittently passes through the flow limiting.
Preferably, a buffer cavity is formed in one end, close to the piston rod, of the supporting block, and a sliding column is connected in the buffer cavity in a sliding mode; one end of the sliding column, which is positioned outside the buffer cavity, is hinged with the connecting rod; the oil-blocking ring is of a hollow structure, and a cavity in the oil-blocking ring is communicated with the buffer cavity through a pipeline; compressed gas generated by the sliding column extrusion buffer cavity is filled into a cavity of the oil control ring, so that the friction force between the oil control ring and the flow limiting hole is further increased; after the connecting rod is pushed by the descending piston rod, the supporting block is pushed to abut against the inner wall of the inner cylinder through the transmission of the sliding column and the buffer cavity, when the thrust of the piston rod is transmitted to the sliding column, the sliding column extrudes the air in the buffer cavity, and the situation that the thrust transmitted by the connecting rod directly acts on the supporting block to cause the impact of the supporting block on the inner cylinder and the damage of the inner cylinder is avoided; meanwhile, compressed gas generated in the buffer cavity is filled into the oil control ring through a pipeline, so that the volume of the oil control ring is expanded, the sealing performance and the friction force between the oil control ring and the flow limiting hole are further increased, and the damping effect of the damper is further increased.
The invention has the following beneficial effects:
1. according to the magnetoelectric hybrid suspension type hydraulic damper, the adjusting valve core of the damping control valve is controlled by the controller after displacement is detected by the displacement sensor, so that the repeated flowing speed of hydraulic oil in the damper in the inner cylinder and the outer cylinder is controlled, the effect of adjustable damping can be achieved, the rigidity and the damping of the hydraulic damper can be adjusted in real time within one millisecond according to the position, and the effect of rapid damping is achieved.
2. According to the magnetoelectric hybrid suspension type hydraulic damper, the displacement sensor is used for sensing the vibration direction of the piston rod, when the piston rod and the electromagnet vibrate upwards, the current direction introduced into the electromagnet coil is adjusted, so that the magnetic poles of opposite surfaces of the electromagnet and the permanent magnet are opposite, the larger the vibration displacement is, the larger the current is introduced, and the trend of upward vibration of the piston rod and the electromagnet is suppressed by adjusting the electromagnetic attraction force; when the piston rod and the electromagnet vibrate downwards, the direction of current introduced into the electromagnet coil is adjusted to enable the magnetic poles of opposite surfaces of the electromagnet and the permanent magnet to be the same, the larger the vibration displacement is, the larger the current is introduced, the trend that the piston rod and the electromagnet vibrate downwards is suppressed by adjusting the magnitude of electromagnetic repulsive force, and the effect of adjustable rigidity is achieved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view of the outer cylinder of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
in the figure: the device comprises an upper support 1, a piston rod 2, an outer sealing ring 3, a cylinder cover 4, an inner cylinder 5, an outer cylinder 6, a spring 7, a damping control valve 8, a lower support 9, a piston head 10, a flow limiting hole 11, a fixed frame 12, a suspension 14, a connecting rod 13, a displacement sensor 15, an electromagnet 16, a lead 17, a permanent magnet 18, a sliding hole 19, a supporting block 20, a connecting rod 21, a rubber bowl 22, a push rod 23, an oil control ring 24, a buffer cavity 25 and a sliding column 26.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the magnetoelectric hybrid suspension type hydraulic damper comprises an upper support 1, a piston rod 2, an outer sealing ring 3, a cylinder cover 4, an inner cylinder 5, an outer cylinder 6, a damping control valve 8 and a lower support 9; an inner cylinder 5 is sleeved in the outer cylinder 6, and the outer cylinder 6 is fixedly connected with the inner cylinder 5 through a cylinder cover 4; a piston head 10 is connected in the inner cylinder 5 in a sliding manner, and a piston rod 2 is arranged at one end of the piston head 10; one end of the piston rod 2, which is far away from the piston head 10, is fixedly connected with an upper support 1, and the upper support 1 is sleeved on the vehicle body; the bottom of the outer cylinder 6 is provided with a lower support 9, and the lower support 9 is sleeved on a wheel; the outer sealing ring 3 is positioned between the cylinder cover 4 and the piston rod 2, and hydraulic oil is injected into the inner cylinder 5 and the outer cylinder 6; the bottom of the inner cylinder 5 is communicated with the outer cylinder 6 through a flow limiting hole 11 and a damping control valve 8, and the damping control valve 8 is controlled by a controller; when the piston rod 2 moves, hydraulic oil can flow in the inner cylinder 5 and the outer cylinder 6 through the damping control valve 8, and can provide damping force when passing through a damping hole in the damping control valve 8; a fixed frame 12 is fixedly connected on the piston rod 2 between the upper support 1 and the cylinder cover 4; a suspension 14 fixedly connected with the frame is arranged on one side of the outer cylinder 6, and the suspension 14 is connected with the fixed frame 12 through a connecting rod 13; the suspension 14 is fixedly connected with a displacement sensor 15, and the displacement sensor 15 is electrically connected with a controller through an electric wire; the vehicle is traveling on the road surface, the upper support 1 of the damper is connected with the vehicle body, the lower support 9 is connected with the vehicle wheel, when the vehicle body vibrates, the piston rod 2 and the piston head 10 slide in the inner cylinder 5 in a reciprocating mode, hydraulic oil in the damper is acted on the inner cylinder 5 and the outer cylinder 6 under the action of pressure and flows repeatedly, damping force can be generated when the hydraulic oil passes through the damping control valve 8, the adjustable valve core can achieve the effect of adjustable damping, the rigidity and the damping of the damper can be adjusted in real time within one millisecond according to displacement detected by the displacement sensor 15, and the effect of rapid shock absorption is achieved.
As an embodiment of the invention, the piston head 10 is provided with an electromagnet 16, the electromagnet 16 is connected with a controller and a power supply through a lead 17 in the upper end of the piston rod 2, when the electromagnet 16 is electrified, the electromagnet has magnetism, and the magnetic pole and strength of the magnetism can be changed by changing the current magnitude and direction; an inner sealing ring is arranged between the electromagnet 16 and the piston rod 2; the bottom of the inner cylinder 5 is fixedly connected with a permanent magnet 18, and the middle of the inner cylinder is provided with a hole so as to facilitate the flow of hydraulic oil; a group of springs 7 are arranged between the piston head 10 and the permanent magnet 18, and the springs 7 play a role of buffering when power is off; the piston head 10 is manufactured in a segmented mode and connected through bolts, the piston rod 2 connected to the upper support 1 can drive the electromagnet 16 to vibrate, the displacement sensor 15 is used for sensing the vibration direction of the piston rod 2, when the piston rod 2 and the electromagnet 16 vibrate upwards, according to the electromagnetic principle, the permanent magnet 18 positioned below the electromagnet 16 needs to generate attraction force to inhibit vibration, the direction of current led into a coil of the electromagnet 16 is adjusted, the opposite magnetic poles of opposite surfaces of the electromagnet 16 and the permanent magnet 18 are opposite, the larger the vibration displacement is, the larger the current is led into, and the trend that the piston rod 2 and the electromagnet 16 vibrate upwards is inhibited by adjusting the; when the piston rod 2 and the electromagnet 16 vibrate downwards, the permanent magnet 18 needs to generate repulsive force to inhibit vibration, the direction of current introduced into a coil of the electromagnet 16 is adjusted, opposite magnetic poles of the electromagnet 16 and the permanent magnet 18 are the same, the larger the vibration displacement is, the larger the current is introduced, the trend that the piston rod 2 and the electromagnet 16 vibrate downwards is inhibited by adjusting the magnitude of the electromagnetic repulsive force, the effect of adjustable rigidity is achieved, and the spring 7 positioned between the piston head 10 and the permanent magnet 18 can play a role in buffering when power is off.
As an embodiment of the present invention, the piston rod 2 is slidably connected to the piston head 10, and a set of sliding holes 19 is provided in the piston head 10; a supporting block 20 is connected in the sliding hole 19 in a sliding mode, the supporting block 20 is hinged to the piston rod 2 through a connecting rod 21, when the piston rod 2 moves downwards, the supporting block 20 is pushed out towards the direction close to the inner wall of the inner cylinder 5 through the connecting rod 21, and the friction force between the piston head 10 and the inner cylinder 5 is increased; when the wheel drives the lower support 9 to further drive the piston rod 2 to move downwards, the piston rod 2 pushes the connecting rod 21, the supporting block 20 is further pushed out in the direction close to the inner wall of the inner cylinder 5, the supporting block 20 is in contact with the inner cylinder 5 and then compresses the inner wall of the inner cylinder 5, the friction force between the inner cylinder 5 and the supporting block 20 is increased, the friction force between the piston head 10 and the inner cylinder 5 is increased, the movement resistance of the piston rod 2 is further increased, and a good vibration filtering effect is achieved.
As an embodiment of the invention, one end of the supporting block 20 close to the inner wall of the inner cylinder 5 is provided with a group of grooves, rubber bowls 22 are fixedly connected in the grooves, and the rubber bowls 22 are used for sucking the inner wall of the inner cylinder 5 when the piston head 10 slides upwards; when the piston rod 2 moves downwards, the rubber cup 22 is tightly attached to the inner cylinder 5, the friction force between the piston head 10 and the inner cylinder 5 is increased, when the piston rod 2 moves upwards, the piston rod 2 drives the connecting rod 21 and the support rod to move towards the direction far away from the inner wall of the inner cylinder 5, at the moment, a negative pressure cavity is formed between the opening of the rubber cup 22 and the inner wall of the inner cylinder 5, the rubber cup 22 is sucked on the inner wall of the inner cylinder 5, the upward movement resistance of the piston rod 2 is increased, and the damping effect of the damper is further increased.
As an embodiment of the invention, one end of the piston head 10 far away from the piston rod 2 is fixedly connected with a push rod 23, and the diameter of the push rod 23 is smaller than that of the restricted hole 11; a group of elastic oil control rings 24 are arranged on the part of the push rod 23 close to the flow limiting hole 11, the diameter of each oil control ring 24 is slightly larger than that of the flow limiting hole 11, and the distance between every two adjacent oil control rings 24 is larger than the depth of the flow limiting hole 11; an arc chamfer is arranged on the upper edge of the flow limiting hole 11; the oil control ring 24 increases the motion resistance of the piston rod 2 after entering the flow limiting hole 11 along with the push rod 23; when the piston head 10 moves downwards to approach the bottom of the inner cylinder 5, the push rod 23 is inserted into the flow-limiting hole 11, the flow of hydraulic oil in the flow-limiting hole 11 is further reduced, the reaction force of the hydraulic oil in the inner cylinder 5 on the piston head 10 is increased, the piston head 10 and the permanent magnet 18 are prevented from being damaged due to the fact that the piston head 10 moves quickly to bottom, when the push rod 23 is continuously inserted into the flow-limiting hole 11, the oil control rings 24 are embedded into the flow-limiting hole 11, the reaction force of the hydraulic oil in the inner cylinder 5 on the piston head 10 is further increased, meanwhile, as the distance between the adjacent oil control rings 24 is larger than the depth of the flow-limiting hole 11, after the lower oil control ring 24 passes through the flow-limiting hole 11, the hydraulic oil in the inner cylinder 5 can continuously flow into the outer cylinder 6 through the flow-limiting hole 11, the oil control rings 24 cooperate with the flow-limiting hole 11 to enable the hydraulic oil, increasing the useful life of the oil control ring 24.
As an embodiment of the present invention, a buffer cavity 25 is opened at one end of the supporting block 20 close to the piston rod 2, and a sliding column 26 is slidably connected in the buffer cavity 25; one end of the sliding column 26, which is positioned outside the buffer cavity 25, is hinged with the connecting rod 21; the oil control ring 24 is of a hollow structure, and a cavity in the oil control ring 24 is communicated with the buffer cavity 25 through a pipeline; compressed gas generated by the sliding column 26 extruding the buffer cavity 25 is filled into a cavity of the oil control ring 24, and the friction force between the oil control ring 24 and the flow limiting hole 11 is further increased; after the connecting rod 21 is pushed by the descending piston rod 2, the supporting block 20 is pushed to abut against the inner wall of the inner cylinder 5 through the transmission of the sliding column 26 and the buffer cavity 25, when the thrust of the piston rod 2 is transmitted to the sliding column 26, the sliding column 26 extrudes air in the buffer cavity 25, and the situation that the thrust transmitted by the connecting rod 21 directly acts on the supporting block 20 to cause the supporting block 20 to impact the inner cylinder 5 and damage the inner cylinder 5 is avoided; meanwhile, compressed gas generated in the buffer cavity 25 is filled into the oil control ring 24 through a pipeline, so that the volume of the oil control ring 24 is expanded, the sealing performance and the friction force between the oil control ring 24 and the flow limiting hole 11 are further increased, and the damping effect of the damper is further increased.
When the damper is in work, a vehicle runs on the road surface, the upper support 1 of the damper is connected with a vehicle body, the lower support 9 is connected with wheels, when the vehicle body vibrates, the piston rod 2 and the piston head 10 slide in the inner cylinder 5 in a reciprocating manner, hydraulic oil in the damper is acted on the inner cylinder 5 and the outer cylinder 6 under the action of pressure to flow repeatedly, damping force can be generated when the hydraulic oil passes through the damping control valve 8, the valve core can be adjusted to achieve the effect of adjustable damping, the rigidity and the damping of the damper can be adjusted in real time within one millisecond according to displacement detected by the displacement sensor 15, and the effect of rapid shock absorption is achieved; the plug 10 is manufactured in a segmented mode and connected through bolts, a piston rod 2 connected to an upper support 1 can drive an electromagnet 16 to vibrate, a displacement sensor 15 is used for sensing the vibration direction of the piston rod 2, when the piston rod 2 and the electromagnet 16 vibrate upwards, according to the electromagnetic principle, a permanent magnet 18 positioned below the electromagnet 16 needs to generate attraction force to inhibit vibration, the direction of current led into a coil of the electromagnet 16 is adjusted, the opposite magnetic poles of opposite surfaces of the electromagnet 16 and the permanent magnet 18 are opposite, the larger the vibration displacement is, the larger the current is led into, and the trend that the piston rod 2 and the electromagnet 16 vibrate upwards is inhibited by adjusting the size of; when the piston rod 2 and the electromagnet 16 vibrate downwards, the permanent magnet 18 needs to generate repulsive force to inhibit vibration, the direction of current introduced into a coil of the electromagnet 16 is adjusted, opposite magnetic poles of the electromagnet 16 and the permanent magnet 18 are the same, the larger the vibration displacement is, the larger the current is introduced, the trend that the piston rod 2 and the electromagnet 16 vibrate downwards is inhibited by adjusting the magnitude of the electromagnetic repulsive force, the effect of adjustable rigidity is achieved, and the spring 7 positioned between the piston head 10 and the permanent magnet 18 can play a role of buffering when the power is off; when the wheels drive the lower support 9 to drive the piston rod 2 to move downwards, the piston rod 2 pushes the connecting rod 21 to further push the supporting block 20 out in the direction close to the inner wall of the inner cylinder 5, the supporting block 20 is in contact with the inner cylinder 5 and then compresses the inner wall of the inner cylinder 5, the friction force between the inner cylinder 5 and the supporting block 20 is increased, the friction force between the piston head 10 and the inner cylinder 5 is increased, the movement resistance of the piston rod 2 is further increased, and a good shock-filtering effect is achieved; when the piston rod 2 moves downwards, the rubber bowl 22 is tightly attached to the inner cylinder 5, the friction force between the piston head 10 and the inner cylinder 5 is increased, when the piston rod 2 moves upwards, the piston rod 2 drives the connecting rod 21 and the support rod to move towards the direction far away from the inner wall of the inner cylinder 5, at the moment, a negative pressure cavity is formed between the opening of the rubber bowl 22 and the inner wall of the inner cylinder 5, the rubber bowl 22 is sucked on the inner wall of the inner cylinder 5, the upward movement resistance of the piston rod 2 is increased, and the damping effect of the damper is further increased; when the piston head 10 moves downwards to approach the bottom of the inner cylinder 5, the push rod 23 is inserted into the flow-limiting hole 11, the flow of hydraulic oil in the flow-limiting hole 11 is further reduced, the reaction force of the hydraulic oil in the inner cylinder 5 on the piston head 10 is increased, the piston head 10 and the permanent magnet 18 are prevented from being damaged due to the fact that the piston head 10 moves quickly to bottom, when the push rod 23 is continuously inserted into the flow-limiting hole 11, the oil control rings 24 are embedded into the flow-limiting hole 11, the reaction force of the hydraulic oil in the inner cylinder 5 on the piston head 10 is further increased, meanwhile, as the distance between the adjacent oil control rings 24 is larger than the depth of the flow-limiting hole 11, after the lower oil control ring 24 passes through the flow-limiting hole 11, the hydraulic oil in the inner cylinder 5 can continuously flow into the outer cylinder 6 through the flow-limiting hole 11, the oil control rings 24 cooperate with the flow-limiting hole 11 to enable the hydraulic oil, increasing the service life of the oil control ring 24; after the connecting rod 21 is pushed by the descending piston rod 2, the supporting block 20 is pushed to abut against the inner wall of the inner cylinder 5 through the transmission of the sliding column 26 and the buffer cavity 25, when the thrust of the piston rod 2 is transmitted to the sliding column 26, the sliding column 26 extrudes air in the buffer cavity 25, and the situation that the thrust transmitted by the connecting rod 21 directly acts on the supporting block 20 to cause the supporting block 20 to impact the inner cylinder 5 and damage the inner cylinder 5 is avoided; meanwhile, compressed gas generated in the buffer cavity 25 is filled into the oil control ring 24 through a pipeline, so that the volume of the oil control ring 24 is expanded, the sealing performance and the friction force between the oil control ring 24 and the flow limiting hole 11 are further increased, and the damping effect of the damper is further increased.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a suspended hydraulic damper is mixed to magnetoelectric, its characterized in that: the damping device comprises an upper support (1), a piston rod (2), an outer sealing ring (3), a cylinder cover (4), an inner cylinder (5), an outer cylinder (6), a damping control valve (8) and a lower support (9); an inner cylinder (5) is sleeved in the outer cylinder (6), and the outer cylinder (6) is fixedly connected with the inner cylinder (5) through a cylinder cover (4); a piston head (10) is connected in the inner cylinder (5) in a sliding manner, and a piston rod (2) is arranged at one end of the piston head (10); one end of the piston rod (2) far away from the piston head (10) is fixedly connected with an upper support (1), and the upper support (1) is sleeved on the vehicle body; a lower support (9) is arranged at the bottom of the outer cylinder (6), and the lower support (9) is sleeved on the wheel; the outer sealing ring (3) is positioned between the cylinder cover (4) and the piston rod (2), and hydraulic oil is injected into the inner cylinder (5) and the outer cylinder (6); the bottom of the inner cylinder (5) is communicated with the outer cylinder (6) through a flow limiting hole (11) and a damping control valve (8), and the damping control valve (8) is controlled by a controller; when the piston rod (2) moves, hydraulic oil can flow in the inner cylinder (5) and the outer cylinder (6) through the damping control valve (8), and can provide damping force when passing through a damping hole in the damping control valve (8); a fixed frame (12) is fixedly connected on the piston rod (2) between the upper support (1) and the cylinder cover (4); a suspension (14) fixedly connected with the frame is arranged on one side of the outer cylinder (6), and the suspension (14) is connected with the fixed frame (12) through a connecting rod (13); a displacement sensor (15) is fixedly connected to the suspension (14), and the displacement sensor (15) is electrically connected with a controller through a lead (17); the piston head (10) is provided with an electromagnet (16), the electromagnet (16) is connected with a controller and a power supply through a lead (17) in the upper end of the piston rod (2), the electromagnet (16) has magnetism when being electrified, and the magnetic pole and strength of the magnetism can be changed by changing the current magnitude and direction; an inner sealing ring is arranged between the electromagnet (16) and the piston rod (2); the bottom of the inner cylinder (5) is fixedly connected with a permanent magnet (18), and the middle of the inner cylinder is provided with a hole so as to facilitate the flow of hydraulic oil; a group of springs (7) are arranged between the piston head (10) and the permanent magnet (18), and the springs (7) play a role of buffering when the power is off; the piston rod (2) is connected with the piston head (10) in a sliding manner, and a group of sliding holes (19) are formed in the piston head (10); a supporting block (20) is connected in the sliding hole (19) in a sliding mode, the supporting block (20) is hinged to the piston rod (2) through a connecting rod (21), when the piston rod (2) moves downwards, the supporting block (20) is pushed out towards the direction close to the inner wall of the inner cylinder (5) through the connecting rod (21), and friction force between the piston head (10) and the inner cylinder (5) is increased.
2. The magneto-electric hybrid suspension type hydraulic damper according to claim 1, characterized in that: one end of the supporting block (20) close to the inner wall of the inner cylinder (5) is provided with a group of grooves, rubber bowls (22) are fixedly connected in the grooves, and the rubber bowls (22) are used for sucking the inner wall of the inner cylinder (5) when the piston head (10) slides upwards.
3. The magneto-electric hybrid suspension type hydraulic damper according to claim 2, characterized in that: one end of the piston head (10) far away from the piston rod (2) is fixedly connected with a push rod (23), and the diameter of the push rod (23) is smaller than that of the flow limiting hole (11); a group of elastic oil control rings (24) are arranged on the part of the push rod (23) close to the flow limiting hole (11), the diameter of each oil control ring (24) is slightly larger than that of the flow limiting hole (11), and the distance between every two adjacent oil control rings (24) is larger than the depth of the flow limiting hole (11); an arc chamfer is arranged on the upper edge of the flow limiting hole (11); when the oil-resistant ring (24) enters the flow-limiting hole (11) along with the push rod (23), the motion resistance of the piston rod (2) is increased.
4. The magneto-electric hybrid suspension type hydraulic damper according to claim 3, characterized in that: a buffer cavity (25) is formed in one end, close to the piston rod (2), of the supporting block (20), and a sliding column (26) is connected in the buffer cavity (25) in a sliding mode; one end of the sliding column (26) positioned outside the buffer cavity (25) is hinged with the connecting rod (21); the oil control ring (24) is of a hollow structure, and a cavity in the oil control ring (24) is communicated with the buffer cavity (25) through a pipeline; compressed gas generated by the compression of the buffer cavity (25) by the sliding column (26) is filled into a cavity of the oil control ring (24), and the friction force between the oil control ring (24) and the flow limiting hole (11) is further increased.
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CN114151872B (en) * 2021-10-25 2023-05-05 珠海格力电器股份有限公司 Rigidity-controllable vibration reduction foot pad, air conditioner outdoor unit comprising same and control method of air conditioner outdoor unit
CN114198364A (en) * 2021-12-22 2022-03-18 北京理工大学重庆创新中心 Composite load simulation test device and simulation test method thereof
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