Liquid-gas supporting vibration damper
阅读说明：本技术 一种液气支撑减振装置 (Liquid-gas supporting vibration damper ) 是由 陈刚 于 2018-08-01 设计创作，主要内容包括：一种液气支撑减振装置,其方法是将主要由液气储能器和单作用液压缸构成的液气支撑减振装置的油路分为两路,其中一路为流入液压缸的进液油路,另一路为流出液压缸的出液油路,用测力元件测量液气支撑减振装置对所支撑物的支撑力值,控制组件将支撑力值与设定力值或支撑减振装置所支撑物的重力值进行比较,根据比较结果通过机械、液压或电控等方式分别控制减振器进液油路和出液油路的阻尼,从而调节支撑减振装置的支撑力值,使支撑减振装置的支撑力值等于或接近于设定力值或支撑减振装置所支撑物的重力。(A hydraulic-pneumatic supporting vibration damper features that the oil path of hydraulic-pneumatic supporting vibration damper composed of hydraulic accumulator and single-acting hydraulic cylinder is divided into two paths, one is the liquid inlet path flowing in hydraulic cylinder and the other is the liquid outlet path flowing out of hydraulic cylinder, the force measuring element is used to measure the supporting force of hydraulic-pneumatic supporting vibration damper to the object to be supported, the control module compares the supporting force with the set value or the gravitational value of the object to be supported by supporting vibration damper, and the damping of liquid inlet path and liquid outlet path is controlled mechanically, hydraulically or electrically according to the comparison result to regulate the supporting force of supporting vibration damper.)
1. A hydro-pneumatic support shock absorber device comprising:
the hydraulic-pneumatic power generation device comprises a hydraulic-pneumatic energy accumulator, a single-acting hydraulic cylinder, a one-way valve, a damping valve, a force measuring element, a control assembly and the like;
the method is characterized in that: the two groups of oil paths in series with the damping valve and the one-way valve form a liquid inlet oil path and a liquid outlet oil path which are connected in parallel between the hydraulic cylinder and the liquid-gas energy accumulator; the real-time supporting force value of the supporting vibration damper measured by the force measuring element is compared with a target force value by the control assembly, and the damping of the two damping valves is respectively controlled in a mechanical mode, a hydraulic mode or an electric control mode according to a comparison result.
2. The hydro-pneumatic support vibration damping device of claim 1, wherein: and calculating the average supporting force value measured by the force measuring element in unit time by the control component according to the real-time measured value of the force measuring element, and taking the average force value as a target force value.
3. The hydro-pneumatic support vibration damping device of claim 1, wherein:
the damping valve on the liquid inlet oil way and the damping valve on the liquid outlet oil way are integrated on a valve component;
the left and right damping valves formed by the valve block (11) and the slide valve (15) of the valve component are respectively a liquid inlet oil way damping valve and a liquid outlet oil way damping valve;
the left side and the right side of the slide valve (15) are respectively provided with a control port (18) connected with the control component and a valve port (10) connected with the hydraulic cylinder;
the valve port (10) is communicated with the liquid outlet valve port of the liquid inlet oil way damping valve and the liquid inlet valve port of the liquid outlet oil way damping valve;
the valve body is provided with a liquid inlet valve port (14) of the liquid inlet damping valve and a liquid outlet valve port (13) of the liquid outlet damping valve;
a liquid inlet valve port (14) of the liquid inlet damping valve is connected with a one-way valve (16) on a liquid inlet oil way, a liquid outlet valve port (13) of the liquid outlet damping valve is connected with a one-way valve (12) on a liquid outlet oil way, and the liquid inlet oil way and the liquid outlet oil way are connected with a liquid-gas energy accumulator (4);
the liquid inlet check valve (16) and the liquid outlet check valve (12) can be integrated on the valve component and can also be externally connected on the valve component;
the control port (18) and the valve port (10) can be communicated or not communicated, and can also be communicated through a damping hole (27);
the control component controls the slide valve (15) to move left and right through the control port (18), so that the damping of the damping valve is controlled.
4. An electrically controlled hydro-pneumatic support and damping device comprising the support and damping device of claim 1, wherein:
the force measuring element mainly comprises a force measuring sensor or a pressure sensor, and the damping valve mainly comprises two paths of electric control dampers which are respectively connected in series on the liquid inlet one-way valve and the liquid outlet one-way valve;
the control assembly calculates the approximate gravity value of the object supported by the supporting vibration-damping device according to the measured value of the sensor, compares the real-time measured value of the sensor with the approximate gravity value of the object supported by the supporting vibration-damping device, and controls the damping value of the electric control damper according to the comparison result.
5. A magnetorheological fluid gas support damper comprising the support damper of claim 1, wherein:
the hydraulic medium is magnetorheological fluid, the force measuring element is mainly composed of a force measuring sensor or a pressure sensor, and the damping valve is mainly composed of two magnetorheological dampers (24, 25);
the control assembly (1) calculates the gravity value of the support of the supporting and vibration-damping device according to the measured value of the sensor (26), compares the real-time measured value of the sensor (26) with the gravity value of the support of the supporting and vibration-damping device, and controls the damping values of the magnetorheological dampers (24, 25) according to the comparison result.
6. The support and vibration damping apparatus as set forth in claim 3, further comprising: proportional electromagnets, etc.; the method is characterized in that:
the force measuring element is mainly composed of a force measuring sensor or a pressure sensor, and the control port (18) is completely communicated with the valve port (10);
the control assembly calculates the gravity value of the object supported by the supporting vibration damper according to the measured value of the sensor, compares the real-time measured value of the sensor with the gravity value of the object supported by the supporting vibration damper, and controls the proportional electromagnet (17) to drive the slide valve (15) to move left and right according to the comparison result so as to control the damping values of the two damping valves.
7. A support and vibration damping apparatus as claimed in claim 3, wherein:
the force measuring element mainly comprises a pressure regulating spring (19), and the control assembly mainly comprises the pressure regulating spring (19) and a slide valve (15); the control port (18) is not communicated with the valve port (10), the control port (18) is connected with a pressure regulating spring (19), the force of the pressure regulating spring (19) directly acts on the slide valve (15) to be compared with the pressure of the valve port (10) and control the slide valve (15) to move left and right, so as to control the damping of the two damping valves.
8. The supporting and damping device as claimed in claim 7 further comprises an electrically controlled pressure regulating actuator (21), a force cell formed by a pressure sensor or a force sensor, etc.; the method is characterized in that:
the control assembly adjusts a preset pressure value of a pressure adjusting spring (19) through an electric control pressure adjusting execution device according to the approximate gravity value of a support of the support vibration damping device measured by the force measuring element, the preset pressure value is compared with a pressure value of liquid flow in the hydraulic cylinder (7) loaded on the slide valve (15), and the slide valve (15) is controlled to move left and right, so that damping of the two damping valves is controlled.
9. A support and vibration damping apparatus as claimed in claim 3, wherein:
the force measuring element is mainly composed of a liquid-gas energy storage device (23), a control port (18) is not communicated with a valve port (10) or is communicated with the valve port through a damping hole, the liquid-gas energy storage device (23) is connected to the control port (18), the pressure of the liquid-gas energy storage device (23) acting on the slide valve (15) is compared with the pressure of a hydraulic cylinder of the valve port (10) acting on the slide valve (15) and pushes the slide valve (15) to move left and right, and therefore the damping of the two damping valves is controlled.
10. A vehicle, such as a two-wheeled, three-wheeled or multi-wheeled vehicle, wherein one or more of the support and vibration damping devices of claims 1-9 are employed.
Technical Field
The invention relates to a hydraulic support vibration damper, which is particularly suitable for vehicle suspension and vibration damping.
Background
The damping control method of the hydro-pneumatic support is that a damping valve, a one-way valve and the like in the hydraulic cylinder are used for controlling the damping of the hydro-pneumatic support to achieve the aim of damping.
For a passive support shock absorber, the magnitude of the damping force generally depends on the magnitude of the pressure difference on two sides of a damping valve, the damping value is not adjustable, the adaptability is poor, and the shock absorption effect is not ideal; the semi-active support shock absorber or the active shock absorber usually adopts an electric control mode to adjust the damping of the damping valve, the damping of the throttling hole needs to be controlled by using more complicated links such as data acquisition, processing and control, the used parts are more, the cost is higher, the control theory, the method and the data processing are more complicated, and the reliability is poor, which is one of the reasons that the current liquid-gas suspension is not common, and particularly, the application is less on a car.
Disclosure of Invention
Technical problem to be solved by the invention
Firstly, the liquid-gas support shock absorber has poor damping performance and poor adaptability to different road surfaces.
Secondly, the liquid-gas support shock absorber is complex in structure, more in parts for controlling damping control, high in cost and difficult to maintain.
And thirdly, the liquid-gas support shock absorber is low in reliability, is particularly used for an active suspension system, and is more in components, complex in control theory and higher in failure rate.
Technical scheme of the invention
The method is characterized in that an oil path of a hydraulic-pneumatic support vibration damping device mainly composed of a hydraulic-pneumatic accumulator and a single-acting hydraulic cylinder is divided into two paths, wherein one path is a liquid inlet oil path flowing into the hydraulic cylinder, the other path is a liquid outlet oil path flowing out of the hydraulic cylinder, a force measuring element is used for measuring the supporting force value of the hydraulic-pneumatic support vibration damping device on a supported object, a control assembly compares the supporting force value with a set force value or the gravity of the supported object of the support vibration damping device, and the damping of the liquid inlet oil path and the liquid outlet oil path of the vibration damper is respectively controlled in a mechanical, hydraulic or electric control mode according to the comparison result, so that the supporting force value of the support vibration damping device is adjusted to be equal to or close to the.
The specific scheme is as follows:
the method is characterized in that: two groups of oil paths which are serially connected with damping valves (24, 25) and one-way valves (16, 12) form a liquid inlet oil path and a liquid outlet oil path which are connected in parallel between the hydraulic cylinder (7) and the liquid-gas energy accumulator (4); the force measuring element (26) measures a real-time supporting force value of the supporting and vibration damping device, the control assembly (1) compares the real-time supporting force value with a target force value, and controls the damping of the two damping valves (24, 25) respectively in a mechanical, hydraulic or electric control mode and the like according to a comparison result so as to control the flow rate and pressure of liquid flowing into the hydraulic cylinder (7) and liquid flowing out of the hydraulic cylinder (7) and enable the supporting force value of the supporting and vibration damping device to be equal to or close to a set force value or the gravity of a supporting object of the supporting and vibration damping device.
Target force value: the supporting force value to be achieved by the hydro-pneumatic supporting vibration damper is indicated; the force value can be set according to the requirement, and can also be an approximate gravity value of the object supported by the supporting shock absorber.
Gravity value of the object supported by the support damper: i.e. the weight of the object supported by the support damper, can be calculated by the control unit from the real-time measurements of the load cell, by the following methods:
a. in a static state, the gravity value of the object supported by the supporting shock absorber is directly measured by the force measuring element.
b. The control component calculates the average supporting force value measured by the force measuring element in unit time according to the real-time measured value of the force measuring element, namely, the measured value of the force measuring element is sampled for a plurality of times in unit time, and the average force value of the sampled sample is calculated and is used as the approximate gravity value of the support shock absorber.
c. The average force value of the supporting force value in unit time is measured by adopting a simulation resistance-capacitance filtering circuit method, namely, the real-time force value measured by the force measuring element is smoothly filtered into an approximate average force value through a resistance-capacitance filtering circuit (shown in figure 2), and the approximate average force value is used as an approximate gravity value of a support of the supporting shock absorber.
d. And calculating an average force value by calculating the average pressure of liquid flow in the hydraulic cylinder by adopting a method of connecting damping holes between the liquid-gas energy storage device and the hydraulic cylinder in series. In the scheme 8 (figure 5), the control port (18) is communicated with the valve port (10) through the damping hole (27), so that the pressure in the hydraulic-pneumatic energy accumulator (4) is close to the average pressure value of the hydraulic cylinder (7). The hydraulic cylinder (7) is communicated with the liquid-gas energy storage device (4) through the damping hole (27), when the pressure in the hydraulic cylinder (7) is increased or decreased, the pressure in the liquid-gas energy storage device (4) can be slowly increased or decreased along with the pressure of the hydraulic cylinder (7) due to the action of the damping hole (27), and the smaller the damping hole (27) is, the closer the pressure in the liquid-gas energy storage device (4) is to the average force value of the hydraulic cylinder (7), so that the pressure is used as the approximate gravity value for supporting the object supported by the shock absorber.
When the method of setting the force value is adopted as the target force value, the force value can be set through a pressure regulating spring or through input of a control assembly and the like.
A force measuring element: the device refers to a component which can directly or indirectly measure or set pressure or force value, such as a force measuring spring, a pressure setting spring, a pressure sensor, a force sensor and the like.
The function of the control assembly: and receiving and processing the real-time force value or the real-time pressure value measured by the force measuring element, calculating and determining the gravity value of a support supported by the support shock absorber and the target force value or the target pressure value, comparing the real-time measured value with the target value, outputting a control signal according to the comparison result, and controlling the damping of the damping valve.
For the liquid-gas supporting device adopting the force transducer, the control assembly mainly comprises an electronic element and also comprises a programmable control assembly such as a singlechip, a PLC and the like.
For mechanically or hydraulically controlled hydro-pneumatic support devices, the control assembly is the component that associates the load cell with the damper valve. If spring loading is used as a support damping device for the load cell (as shown in fig. 3), the spring (19) and the slide valve (15) act directly, i.e. the spring and the slide valve (15) compromise the function of the control unit. The same is true when the supporting and damping device adopts a liquid-gas energy accumulator (as shown in figure 5) as a force measuring element, and the liquid-gas energy accumulator (4) and the slide valve (15) directly act, namely the liquid-gas energy accumulator (23) and the slide valve (15) take the functions of a control assembly into account.
The damping control method comprises the following steps:
when the real-time measured value of the sensor is larger than the target force value, the damping value of a damping valve on the liquid inlet oil way (9) of the hydraulic cylinder (7) is increased, and the damping value of a damper on the liquid outlet oil way (6) of the hydraulic cylinder (7) is reduced.
When the real-time measured value of the sensor is smaller than the target force value, the damping value of a damping valve on the liquid inlet oil way (9) of the hydraulic cylinder (7) is reduced, and the damping value of a damper on the liquid outlet oil way (6) of the hydraulic cylinder (7) is increased.
The average force value is close to the gravity value of the object supported by the supporting damping device.
An electric control damper: the part for changing the damping of the valve component by controlling the current, the voltage, the power-on time and the like is an electric control damper, and comprises a proportional solenoid valve, a magneto-rheological damping valve, an electro-rheological damper and the like.
Scheme 5 (fig. 1) a magnetorheological fluid-air supporting vibration damper composed of the fluid-air supporting vibration damper of
(fig. 2) the support and vibration damping apparatus according to
(fig. 3) the support and vibration damping apparatus according to
(fig. 4) the supporting and damping device according to
The function of the pressure regulating execution component is to regulate the preset force value of the pressure regulating spring (19).
(fig. 5) the support and vibration damping apparatus according to
The invention has the advantages of
Firstly, the vibration damping of the liquid-gas support vibration absorber can be automatically adjusted according to the road condition of the vehicle in the running process, and the liquid-gas support vibration absorber has the function of self-adaptive vibration attenuation.
And secondly, the reliability of the liquid-gas supporting vibration damper is higher, the cost is lower, the vibration damping effect is better, and the adaptability is stronger.
And compared with the active support damping device, the structure is simpler, and the active damping device has an active damping control function.
Drawings
FIG. 1 is a schematic view of a magnetorheological fluid air-supported vibration damping device
FIG. 2 is a schematic view of an electromagnetic proportional valve controlled type hydro-pneumatic support damper
FIG. 3 is a schematic view of a spring preset control type hydro-pneumatic support damper
FIG. 4 is a schematic view of an electric control automatic control type liquid-gas support damper
FIG. 5 is a schematic view of a hydraulic-pneumatic support damper controlled by a hydraulic-pneumatic accumulator
Graphic numbering names:
1-control assembly 2-control signal line 3-sensor signal line
4-main liquid-gas energy accumulator 5-main liquid-gas energy accumulator interface 6-liquid outlet oil circuit
7-single-action hydraulic cylinder 8-force measuring sensor 9-liquid inlet oil way
10-valve port (connected with hydraulic cylinder) 11-valve block 12-liquid outlet one-way valve
13-liquid outlet damping valve port 14-liquid inlet damping valve port
15-slide valve 16-liquid inlet one-way valve 17-proportional electromagnetic valve
18-
21-electric control voltage regulation execution device 22-voltage regulation execution device moving block
23-auxiliary liquid-gas energy accumulator 24-magnetorheological damping valve on liquid outlet oil way
25-
Detailed Description
Preferred embodiment 1: FIG. 1 is a schematic view of a magnetorheological fluid air-supported vibration damper
This support damping device includes: the hydraulic-pneumatic hydraulic system comprises a hydraulic-pneumatic energy accumulator (4), a single-acting hydraulic cylinder (7), liquid inlet one-way valves (15) and (15), a liquid outlet one-way valve (12), a liquid outlet magneto-rheological damping valve (24), a liquid inlet magneto-rheological damping valve (25), a pressure sensor (26), a control assembly (1) and the like. A liquid inlet oil way in series with a liquid inlet magneto-rheological damping valve (25) and a liquid inlet check valve (15) and a liquid outlet oil way in series with a liquid outlet check valve (12) and a liquid outlet magneto-rheological damping valve (24) are connected in parallel between the liquid-gas energy accumulator (4) and the hydraulic cylinder (7). The pressure sensor (26) is connected to an oil path of the hydraulic cylinder (7) to measure the hydraulic pressure value in the hydraulic cylinder (7).
The working principle is as follows:
the control assembly (1) calculates a real-time pressure value and an average pressure value in unit time according to a pressure value measured by the pressure sensor (26), compares the real-time pressure value with a real-time pressure value by taking the average pressure value in unit time as a target pressure value of the vibration damper, and outputs a control signal to increase a damping value of a magneto-rheological damping valve (25) on a liquid inlet oil way (9) of the hydraulic cylinder (7) and reduce a damping value of a magneto-rheological damping valve (24) on a liquid outlet oil way of the hydraulic cylinder (7) when the real-time pressure value of the pressure sensor (26) is greater than the target pressure value.
When the real-time pressure value of the sensor is smaller than the target pressure value, the control assembly (1) outputs a control signal to reduce the damping value of the magnetorheological damping valve (25) on the liquid inlet oil way (9) of the hydraulic cylinder (7), and simultaneously increases the damping value of the magnetorheological damping valve (24) on the liquid outlet oil way of the hydraulic cylinder (7).
Preferred embodiment 2: as shown in the schematic diagram of the electromagnetic proportional valve controlled type hydro-pneumatic support shock absorber in FIG. 2:
this support damping device includes: the device mainly comprises two damping valves and a force measuring element, wherein the two damping valves are mainly formed by a valve body (11) and a slide valve (15), the force measuring element is mainly formed by a force measuring sensor (8), a control assembly is mainly formed by a control assembly (1), a liquid inlet one-way valve (16) and a liquid outlet one-way valve (12) are integrated on the valve body (11), and a proportional electromagnet (17) and the like. The liquid-gas energy accumulator (4) is respectively communicated with a liquid inlet damping valve port (14) and a liquid outlet damping valve port (13) of a slide valve (15) through a liquid inlet check valve (16) and a liquid outlet check valve (12), then is connected to the hydraulic cylinder (7) through a valve port (10), a control port (18) is communicated with the valve port (10), and the slide valve (15) is controlled to move left and right by a proportional electromagnet (17).
The working principle is as follows:
the control assembly (1) calculates a real-time supporting force value and an average supporting force value in unit time according to a supporting force value measured by the force measuring sensor (8), the average supporting force value in unit time is used as a target supporting force value of the vibration damper and is compared with the real-time supporting force value, when the real-time supporting force value of the force measuring sensor is larger than the target force value, the control assembly (1) outputs a control signal to control the proportional electromagnet (17) to move left, so that the sliding valve (15) is driven to move left, the damping value of a damping valve on a liquid inlet oil way (9) of the hydraulic cylinder (7) is increased, and the damping value on a liquid outlet oil way (6) of the hydraulic cylinder (7) is reduced.
When the real-time supporting force value of the force measuring sensor is smaller than the target force value, the control assembly (1) outputs a control signal to control the proportional electromagnet (17) to move rightwards, so that the slide valve (15) is driven to move rightwards, the damping value of the damping valve on the liquid inlet oil way (9) of the hydraulic cylinder (7) is reduced, and the damping value on the liquid outlet oil way (6) of the hydraulic cylinder (7) is increased.
Preferred embodiment 3: fig. 3 is a schematic diagram of a spring preset control type hydro-pneumatic support damper:
this support damping device includes: the damping valve mainly comprises a valve body (11) and a slide valve (15), a liquid inlet one-way valve (16) and a liquid outlet one-way valve (12) are integrated on the valve body (11), a force measuring element mainly comprises a pressure regulating spring (19), and a control assembly mainly comprises the pressure regulating spring (19) and the slide valve (15). The liquid-gas energy accumulator (4) is communicated with a liquid inlet damping valve port (14) and a liquid outlet damping valve port (13) of the slide valve (15) through a liquid inlet check valve (16) and a liquid outlet check valve (12), and then is connected to the hydraulic cylinder (7) through the valve port (10), a control port (18) is not communicated with the valve port (10), a pressure regulating spring (19) is arranged on the control port, and the force of the pressure regulating spring (19) directly acts on the slide valve (15).
The working principle is as follows:
when the pressure of the valve port (10) is lower than the set force value of the pressure regulating spring (19), the slide valve (15) moves to the right, the liquid flow resistance flowing into the hydraulic cylinder (7) from the liquid-gas energy accumulator (4) is reduced, and the liquid flow damping flowing into the liquid-gas energy accumulator (4) from the hydraulic cylinder (7) is increased.
When the pressure of the valve port (10) is higher than the set force value of the pressure regulating spring (19) or the pressure regulating liquid-gas energy accumulator (4), the slide valve (15) moves leftwards, the liquid flow resistance flowing into the hydraulic cylinder (7) from the liquid-gas energy accumulator (4) is increased, and the liquid flow damping flowing into the liquid-gas energy accumulator (4) from the hydraulic cylinder (7) is reduced.
Preferred embodiment 4: FIG. 4 is a schematic view of an electrically controlled automatic control type hydro-pneumatic support damper
This support damping device includes: a damping valve mainly composed of a valve body (11) and a slide valve (15), a liquid inlet one-way valve (16) and a liquid outlet one-way valve (12) are integrated on the valve body (11), a control assembly mainly comprises a control assembly (1), an electric control pressure regulating execution device (21), a force sensor (8) and a force measuring element composed of a pressure regulating spring (19) and the like; the method is characterized in that: the liquid-gas energy accumulator (4) is communicated with a liquid inlet damping valve port (14) and a liquid outlet damping valve port (13) of the slide valve (15) through a liquid inlet check valve (16) and a liquid outlet check valve (12), and then is connected to the hydraulic cylinder (7) through the valve port (10), a control port (18) is not communicated with the valve port (10), a pressure regulating spring (19) is arranged on the control port, and the force of the pressure regulating spring (19) directly acts on the slide valve (15); the control assembly controls the electric control pressure regulating execution device (21) to regulate a preset pressure value of the pressure regulating spring (19) according to an approximate gravity value of a support supported by the support vibration damping device measured by the force measuring element, the preset pressure value is compared with a pressure value of liquid flow in the hydraulic cylinder (7) loaded on the slide valve (15), and the slide valve (15) is controlled to move left and right.
The working principle is as follows:
when the pressure of the valve port (10) is lower than the set force value of the pressure regulating spring (19), the slide valve (15) moves to the right, the liquid flow resistance flowing into the hydraulic cylinder (7) from the liquid-gas energy accumulator (4) is reduced, and the liquid flow damping flowing into the liquid-gas energy accumulator (4) from the hydraulic cylinder (7) is increased.
When the pressure of the valve port (10) is higher than the set force value of the pressure regulating spring (19), the slide valve (15) moves leftwards, the liquid flow resistance flowing into the hydraulic cylinder (7) from the liquid-gas energy accumulator (4) is increased, and the liquid flow damping flowing into the liquid-gas energy accumulator (4) from the hydraulic cylinder (7) is reduced.
The function of the pressure regulating actuator (21) is to regulate a preset force value of the pressure regulating spring (19).
Preferred embodiment 5: FIG. 5 is a schematic view of a liquid-gas supporting damper controlled by a liquid-gas energy storage device
This support damping device includes: the damping valve mainly comprises a valve body (11) and a slide valve (15), wherein a liquid inlet check valve (16) and a liquid outlet check valve (12) are integrated on the valve body (11); the method is characterized in that: the liquid-gas energy accumulator (4) is respectively communicated with a liquid inlet damping valve port (14) and a liquid outlet damping valve port (13) of the slide valve (15) through a liquid inlet check valve (16) and a liquid outlet check valve (12), and then is connected to the hydraulic cylinder (7) through a valve port (10), a control port (18) is communicated with the valve port (10) through a damping hole (27), a liquid-gas energy accumulator (23) is connected to the control port (18), and the hydraulic pressure in the liquid-gas energy accumulator (23) is close to the average pressure value in the hydraulic cylinder (7) under the action of the damping hole (27).
When the shock absorber works, the pressure of a liquid-gas energy storage device (23) loaded on the slide valve (15) is compared with the pressure of a valve port (10) loaded on the slide valve (15), when the pressure of the valve port (10) is higher than the pressure value of the pressure-regulating liquid-gas energy storage device (23), the slide valve (15) moves to the left, the liquid flow damping flowing into the hydraulic cylinder (7) from the liquid-gas energy storage device (4) is increased, and the liquid flow damping flowing into the liquid-gas energy storage device (4) from the hydraulic cylinder (7) is reduced. When the pressure of the valve port (10) is lower than the pressure value of the pressure-regulating liquid-gas energy accumulator (23), the slide valve (15) moves to the right, the damping of the liquid flow flowing into the hydraulic cylinder (7) from the liquid-gas energy accumulator (4) is reduced, and the damping of the liquid flow flowing into the liquid-gas energy accumulator (4) from the hydraulic cylinder (7) is increased.
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