CN116464730A

CN116464730A - Closed rotary swing vane throttle hole type heat balance hydraulic damper

Info

Publication number: CN116464730A
Application number: CN202310394706.XA
Authority: CN
Inventors: 侯中志; 鲜子衿; 何琨; 王斌
Original assignee: SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY CO Ltd
Current assignee: SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY CO Ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-07-21

Abstract

The closed rotary swing blade throttling hole type heat balance hydraulic damper disclosed by the invention is little affected by temperature change and has high damping efficiency. The method is realized by the following technical scheme: the spring cylinder body provided with the hydraulic thrust spring divides the outer cylinder damping cavity into a high-pressure cavity and a low-pressure cavity of the left-right symmetrical up-down swing blade; working medium flow in the compensation cavity D1 enters the radial oil hole D4 of the piston necking cylinder along the end oil hole D3 through the step annular groove D2 in the front end cover, and the oil supplementing oil way D5, the variable orifice D6 and the damping hole D7 are communicated to supplement the rotary swing vane oil supplementing oil way D8; the oil supplementing oil paths formed by D1-D8 flow into the first circulation groove C3 through the left inclined-diameter oil paths C1-C2 which are cylindrically symmetrical and are communicated with the variable damping hole C4 to enter the second circulation groove C5, and then flow into the low-pressure cavity through the right inclined-diameter oil paths C6-C7 of the rotary pendulum shaft; the damping pressure of low and high pressure cavity expansion with heat and contraction with cold is balanced, and the performance of the damper is stable when the ambient temperature changes.

Description

Closed rotary swing vane throttle hole type heat balance hydraulic damper

Technical Field

0001. The invention relates to a closed rotary swing blade throttle hole type heat balance hydraulic damper which can be widely applied to various industries such as aviation, aerospace, automobiles, nuclear power, thermal power, steel, petrochemical buildings, road and bridge railways and mechanical engineering, ground moving vehicles, aircraft operating systems and the like.

Background

0002. When a plurality of mechanical mechanisms move, vibration and impact can occur, so that the working efficiency of a mechanical system is reduced, the service life is influenced, and the mechanical structure can be damaged seriously; when part of the mechanism moves, the mechanism is poor in movement stability or unstable due to low damping of the mechanism, even resonance occurs, and the mechanism is damaged. In order to reduce the impact of these phenomena on the mechanism, damping devices are often added to the mechanism that effectively protect the mechanism and increase the efficiency of the system. Dampers are devices that provide resistance to movement and consume movement energy. Various friction and other impediments to vibration damping are known as damping. While "special" members placed on the structural system may provide resistance to movement, a device that dissipates movement energy, known as a damper. The working process of the damper is a dissipation process, and the function of damping or inhibiting the excessive fast movement of the mechanical system is realized by converting mechanical energy into heat energy.

0003. Currently, the commonly used dampers mainly comprise an eddy current damper, a viscoelastic damper, a viscous damper, a hydraulic damper and the like. The electric vortex damper has the main advantages of simple structure, high reliability, no pollution except electromagnetic pollution and convenient adjustment. The main disadvantage is that the damping force is too small, the product volume and weight are too large, and the risk of jamming exists. The viscoelastic damper has the main advantages of simple structure and high reliability. The disadvantage is that the volume is large, and the matching relation between the damping force and the elastic force is not easy to adjust.

0004. Viscous dampers are manufactured according to the principle that fluid movement, particularly viscous drag, occurs when fluid passes through an orifice, and are stiffness, velocity dependent dampers. The hydraulic damping device is characterized by generally comprising an oil cylinder, a piston rod, a bushing, a medium, a pin head and the like, wherein the piston can reciprocate in the oil cylinder, a damping structure is arranged on the piston, the oil cylinder is filled with fluid damping medium, viscous resistance is generated when fluid passes through a damping hole, the cylinder body and the piston move relatively, the volume on the left side of the piston is reduced, the viscous damping medium is forced to flow to a right cavity through the damping hole on the piston, and damping force generated by shearing flow can move rightwards under the action of certain resistance. Oil can only flow through the throttle valve under the action of pressure difference. During the flow, energy is lost due to viscous friction of the fluid, thereby dissipating mechanical energy input from the outside. The key part of the hydraulic damper is a damping hole on the piston, and if the damping medium is Newtonian fluid, the influence of local loss is not considered, and the pressure difference at two ends of the damping hole is deltap.

0005. The hydraulic damper is a device for absorbing and converting impact energy when the impact load acts, and limiting the load speed and displacement. Also disclosed is a speed responsive vibration damper which controls the movement of a rotary pendulum shaft by means of a specially configured valve to dampen the effects of cyclical and shock loading of a pipe or apparatus. The hydraulic cylinder filled with hydraulic oil is utilized, and pressure difference is generated between two cavities of the hydraulic cylinder through a damping control valve or a damping orifice, so that damping force is generated on a load, and the dynamic performance of the system is improved. The device is mainly used for preventing damage to pipelines or equipment caused by earthquakes, water hammers, steam hammers, wind loads, exhaust of safety valves and other impact loads. When the motion caused by the force exceeds the allowable speed, the damper will lock, load, and limit the speed to a speed value called post-lock speed or leak rate. The hydraulic damper has the advantage that the hydraulic damper is commonly used for controlling the impact fluid vibration (such as the impact disturbance of main valve quick closing, safety valve discharging, water hammer, pipe breaking and the like) and the pipe system vibration of the earthquake disturbance. Compared with other dampers, the hydraulic damper has the advantages of small volume, light weight, simple structure, large damping force, convenient adjustment of damping coefficient, long service life and good heat dissipation, and is widely applied. The hydraulic damper is classified into a linear type damper and a rotary type damper according to a movement form. The conventional linear damper generally utilizes the volume change of fluid (liquid and gas) to generate damping force by the movement of a one-way valve. The essence is to use the viscosity of the fluid. Although the structure is simple, the cost is low. But has a temperature influence. There is also an effect in vacuum. Is sensitive to the change of the motion speed and the acceleration, and is difficult to generate stable and controllable linear damping.

0006. The rotary damper can directly provide a damper for the rotary motion part, and has small installation size, complex structure and higher part machining precision requirement.

0007. The hydraulic damper has the function of generating pressure difference between two cavities of the hydraulic cylinder by using the hydraulic cylinder filled with hydraulic oil through a damping control valve or a damping orifice, thereby generating damping force on a load and improving the dynamic performance of the system. The hydraulic damper mainly utilizes the fluid resistance principle to damp vibration, and can be used for different gears and torque devices. The damper generates torque due to rotation of medium damping oil, and the resistance is determined by the viscosity and contact area of the damping oil. The viscosity is high, the contact area is large, and the resistance value of the product is increased; on the contrary, the viscosity is small, the contact area is small, and the resistance value is small; however, the torque also changes according to the change of the revolution speed (the torque is proportional to the speed, the static torque is different from the standard value when starting with the increase or decrease of the speed), and the torque changes according to the change of the environment temperature (the torque is reduced when the environment temperature is increased, and the torque is reduced when the environment temperature is increased, but the environment temperature is reduced instead); because of the different application occasions of the hydraulic damper, a plurality of different performance and function requirements can be put forward on the product, and the appearance can be selected according to the use condition of customers. The existing hydraulic damper has the following problems: the damping coefficient of the damper is related to the oil density, the flow coefficient, the structural parameters of the damper, the damping orifice and the like, and is inversely proportional to the fourth power of the diameter d of the damping hole of the hydraulic damper. The damping coefficient and performance of the common hydraulic damper are not adjustable, and the application range is small. The damping coefficient is therefore generally dimensioned by adjusting the diameter of the damping orifice after the other parameters have been determined. The diameter of the damping orifice is increased, the damping coefficient is reduced, the diameter of the damping orifice is reduced, the damping coefficient is increased, the orifice is too small, and the phenomenon of blockage of the orifice is caused by oil pollution. The step shaft movable sealing ring of the piston cylinder is positioned through the two rolling grooves on the end cover, and when the piston rod moves in a high-frequency reciprocating mode, the sealing ring easily axially moves between the two rolling grooves, so that oil leakage faults easily occur in the existing hydraulic damper. Because the pressure resistance of the sealing ring is low, the damping force which can be output by the existing hydraulic damper is also small. The hydraulic damper applied to the aerospace field is required to be small in installation size, light in weight, high in reliability and environmental adaptability, stable in performance, adjustable in part of required damping performance and small in starting friction moment.

0008. Rotary dampers are common in life and work and are suitable for use in a variety of devices requiring cushioned mechanical movement. The rotational damper changes in torque according to changes in the temperature of the environment in which it is used. The change rule is that the torque is reduced when the ambient temperature is increased, and the torque is increased when the ambient temperature is reduced. This is because the viscosity of the viscous oil in the damper changes when the ambient temperature changes. The hydraulic rotary damper is classified into a counter-clockwise or clockwise resistance unidirectional damper and a bidirectional damper having resistance in both directions, and the product has unidirectional and bidirectional resistance directions for selection. Hydraulic dampers are present in various forms, such as pulsation dampers, magnetorheological hydraulic dampers, rotary dampers, hydraulic dampers, etc., and different hydraulic dampers will be different in manner but basically the same basic principle. The damping elements of the rotary damper are mostly in a circular seam throttling mode, damping performance is greatly influenced by the height of a seam and temperature change, and the height of the circular seam of the damper needs to be processed singly and is required to be provided with a temperature compensation element. Damping performance is unstable: the temperature compensation element has larger influence on the performance of the damper, and overcompensation and undercompensation phenomena exist in different temperature sections. The rotary damper has the problems of higher requirements on machining precision, increased machining and manufacturing cost, complex structure and greatly reduced reliability of the damper. The hydraulic damper with the damping holes is very difficult to design and process, and the stability of the working load cannot be ensured. The rotary damper has the requirements of high reliability, strong environmental adaptability and the like, and the starting friction moment, the reliability and the environmental adaptability of the existing rotary damper are urgently improved. The orifice of the orifice throttling damper can generate certain temperature deformation under the long-term cyclic reciprocation action of viscous liquid, so that the damping performance is reduced, and the service life is influenced.

Disclosure of Invention

0009. Aiming at the defects existing in the prior art, the invention provides the small-hole throttling type rotary damper which has the advantages of compact structure, small influence of temperature change, high damping efficiency, stable performance and adjustable damping performance and can balance the cavity pressure of the working medium expansion and contraction damper.

0010. The technical scheme adopted for solving the technical problems is as follows: a closed pendulum blade 10 throttle type thermal balance hydraulic damper comprising: through both ends screw axial fixity, the ring seals rear end cover 1 and front end housing 5 in the inner annular hole in urceolus casing 2 both ends to in the rotatory piston cylinder of urceolus damping chamber center inner ring section of thick bamboo, the pendulum blade 10 of symmetry rotation pendulum shaft 9 assembly, its characterized in that: the inner wall of the outer cylinder damping cavity is provided with a spring seat body which is opposite to the concave circular arc of the middle drum cylinder of the rotary swing blade 10, and the spring cylinder body provided with the hydraulic thrust spring 3 is radially symmetrical, so that the outer cylinder damping cavity is divided into an upper left high pressure cavity A1, an upper right low pressure cavity B1, a lower right low pressure cavity B2 and a lower left high pressure cavity A2 of the upper left rotary swing blade 10 with symmetrical left and right ends; the front end face of the oil supplementing piston 4 is provided with an oil compensating cavity D1 which provides oil supplementing pressure for a right low-pressure cavity B1 and a left lower low-pressure cavity B2 relative to the front end cover 5, working medium flow in the D1 passes through a step annular groove D2 in the front end cover 5, enters a piston necking cylinder radial oil hole D4 along an end oil hole D3, forms a loop oil supplementing oil way D5 through the piston cylinder step hole and a piston rod necking, and is communicated with a variable orifice D6 and a damping hole D7 at the rod end of an oil supplementing valve core 12, supplements an oil supplementing oil way D8 of a rotary swing blade 10 communicated with the right low-pressure cavity B1 and the left lower low-pressure cavity B2, and supplements the D1 working medium to the high-pressure cavities A1 and A2; D1-D8 form make-up oil way through the radial cross symmetrical left oblique diameter oil way C1-C2 of drum cylinder in the middle part of the blade, flow into the conical necking hollow cavity on the revolving body of the rotary pendulum shaft 9 and form the first circulation groove C3, connect adjacent variable damping hole C4, flow into the second circulation groove C5, then enter the right oblique diameter oil way C6-C7 of the radial symmetrical rotary pendulum shaft 9, flow into the low-pressure cavity B1, B2; the rotary pendulum shaft 9 performs rotary swinging motion relative to the outer cylinder 2 through the rocker arm assembly 6, when the rotary pendulum shaft 9 rotates clockwise, when the pressure of the low-pressure cavities B1 and B2 is lower, the damping hole D7 is opened, the volumes of working mediums in the low-pressure cavities B1 and B2 are compressed, the working medium of the oil compensating cavity D1 is supplemented to the high-pressure cavities A1 and A2, the right inclined diameter oil way C6-C7 is communicated through the second circulation groove C5 oil way, the pressure of the damper cavity of the low-pressure cavities B1 and B2 and the working mediums of the high-pressure cavities A1 and A2 is balanced, and the performance of the damper is stable when the environmental temperature is changed.

0011. Compared with the prior art, the invention has the following beneficial effects:

according to the invention, through axially fixing screws at two ends, the rings are sealed on the rear end cover 1 and the front end cover 5 in annular holes at two ends of the outer cylinder shell 2, and the piston cylinder rotates in an annular cylinder in the center of the outer cylinder damping cavity, the rotary pendulum blade 10 assembled by the symmetrical rotary pendulum shaft 9 integrates a small hole damping element, a manual adjusting function damping element and oil compensation inside the outer cylinder blade, so that the temperature compensation-free rotary pendulum damper is designed to the greatest extent by utilizing space, and has compact structure and small influence of temperature change.

0012. The invention adopts a piston cylinder to divide the vertical plane of the damping cavity of the outer cylinder into spring cylinders which are symmetrical up and down, and the spring cylinder body provided with the hydraulic thrust spring 3 is called to divide the damping cavity of the outer cylinder into a left high-pressure cavity A1, a right low-pressure cavity B2 and a left low-pressure cavity A2 of which the left end and the right end are symmetrically provided with upper and lower rotary swinging blades 10; the characteristic that the performance is stable when the V-shaped tapered annular groove with the variable orifice D6 symmetrically coupled with the rotating surface of the rotating pendulum shaft 9 is arranged at the extending end of the oil supplementing valve core 13 is utilized, and the performance stability of the damper is ensured. Analysis shows that the damping performance is little affected by temperature and the performance is stable in a small hole throttling mode. The damping effect of the variable orifice D6 is more remarkable along with the reduction of the damping effect of the V-shaped tapered annular groove.

0013. According to the invention, the rotary pendulum shaft 9 performs rotary pendulum motion relative to the outer barrel 2, when the pressure of the low-pressure cavities B1 and B2 is lower, a rod end damping hole D7 of an oil supplementing valve core 13 is opened, working medium flow in an oil compensating cavity D1 enters a piston necking cylinder radial oil hole D4 along an end oil hole D3 through a step annular groove D2 in a front end cover 5, and is communicated with a loop oil supplementing oil way D5 formed by necking the piston cylinder step hole and the rotary pendulum shaft 9, a variable orifice D6 is communicated with the rod end damping hole D7 of the oil supplementing valve core 13, and an oil supplementing oil way D8 of a rotary pendulum blade 10 communicated with a right low-pressure cavity B1 and a left lower low-pressure cavity B2 is supplemented; through the working medium in the oil compensating cavity D1

D2→d3→d4→d5→d6→the damping hole d7→d8 to supplement the low pressure cavity B1 and the low pressure cavity B2, and the small hole throttling mode is adopted, so that the damping performance is little affected by temperature, the damping efficiency is high, and the performance is stable.

0014. The invention adopts the oil compensation cavity working medium to balance the pressure of the cavity of the damper when expanding with heat and contracting with cold; when the damper rotates at a high frequency, oil is replenished for low pressure, and the phenomenon that the performance of the damper is influenced by a cavity formed by precipitation of oil liquid and gas is prevented. Therefore, the phenomenon that the temperature compensation element has larger influence on the performance of the damper and overcompensation and undercompensation exist in different temperature sections is overcome. The Y-shaped movable sealing ring is designed through rotary movable sealing, and the starting friction moment of the damper is reduced by utilizing the characteristic of small compression force due to lip sealing of the Y-shaped movable sealing ring. By utilizing the highly balanced piston head and piston rod and adding absolute oil leakage prevention, the problems that the axial movement occurs between two rolling grooves during high-frequency reciprocating motion of the piston rod, oil leakage faults occur easily to the hydraulic damper, the pressure resistance of a sealing ring is low, and the output damping force of the hydraulic damper is small are avoided.

0015. When the rotating pendulum shaft 9 rotates clockwise relative to the outer cylinder 2, working medium volumes in the low-pressure cavities B1 and B2 are compressed, working medium in the oil compensating cavity D1 is supplemented to the high-pressure cavities A1 and A2, so that the pressure of a controlled system or a loop is kept constant, the pressure stabilizing, regulating or limiting effect is realized, when the hydraulic pressure on the valve core is larger than the spring force, the valve port is opened, the pretightening force of the spring is regulated, the overflow pressure can be regulated, the magnitude of damping force is controlled, the stress at the two ends of the valve core is restored to be balanced, the pressure difference delta p between the front and the back of the valve port is basically kept unchanged, and the stability of the working load is ensured. When the piston moves along with the structure, the damping medium is forced to flow into the low-pressure cavity from the high-pressure cavity, and in the flowing process, the internal friction force is overcome, so that the kinetic energy of the fluid is converted into heat energy to be transmitted to the outside. The damper utilizes the damping holes to damp energy consumption, so that mechanical energy input from the outside is dissipated, stress conditions of the damper under the conditions of peristaltic motion, low speed and the like are improved, the damper can have stronger energy consumption capability under different external excitation actions, and damping force generated under the strong excitation is kept stable.

0016. According to the invention, an oil supplementing oil way formed by working mediums through D1-D8 flows into a first circulation groove C3 formed by a conical necking hollow cavity on a revolving body of the revolving pendulum shaft 9 through left inclined diameter oil ways C1 and C2 of a revolving pendulum shaft 9 which is formed by radial crossed symmetry of a drum cylinder in the middle of a blade, an adjacent variable damping hole C4 flows into a second circulation groove C5, oil way channels C6 and C7 entering the radial symmetry revolving pendulum shaft 9 flow into low-pressure cavities B1 and B2, high-pressure cavities A1 and A2 are communicated with the first circulation groove C3 through left inclined diameter oil ways C1 and C2, the low-pressure cavities B1 and B2 are communicated with oil way channels C6 and C7 through the second circulation groove C5, the pressure of the low-pressure cavities B1 and B2 and the pressure of a heat expansion and cold contraction damper cavity of the working mediums are balanced, and when the revolving pendulum blade 10 rotates clockwise at a certain angular speed, the left volume cavity is increased due to volume reduction. The right volume chamber forms partial vacuum due to the volume increase, and hydraulic oil is promoted to flow from the high pressure chamber to the low pressure chamber. The rotation of the moving blade causes the hydraulic oil in the left cavity to be pressed, and a pressure difference is generated to act on the moving blade, so that a damping moment M is formed. Under the action of the damping hole, the damping moment generated by the damper is in a proportional relation with the angular speed of the output shaft in a certain range, so that the damping force in a proportional relation with the speed can be obtained, and the oscillation frequency is reduced by consuming the oscillation of the energy to inhibit the control system, so that the system is quickly stabilized. The damper has stable performance when the ambient temperature changes.

0017. According to the invention, the rotary pendulum shaft 9 is made of a metal material, the manual adjusting valve core 14 is made of a plastic material with a higher thermal expansion coefficient, and the position of the rotary pendulum shaft 9 is changed by rotating the manual adjusting valve core 14, so that the manual adjustment of the damping coefficient can be realized. When the temperature is changed, the length change rate of the manual adjusting valve core 14 is large in comparison with the rotary pendulum shaft 9, so that the stability of the damping performance of the temperature change is realized.

0018. The working process of the hydraulic damper can be described by 'hardness and softness' and can slowly move along with the normal thermal expansion of a pipeline or equipment, and the hydraulic damper has almost no damping force and is 'soft'; the valve of the hydraulic damper is activated during load transients, which in turn produces a counter-resistance of the same magnitude as the vibratory force, throttling the pipe or device to produce a larger vibration, reducing the amplitude, thereby acting to protect the pipe or device, which in this case behaves as a "rigid". The orifice throttling damping element generates damping force which is irrelevant to the viscosity of a working medium, namely is insensitive to temperature change, and the problems that the hydraulic damper is easy to generate oil leakage fault, the sealing ring has low pressure resistance and the output damping force of the hydraulic damper is small due to the fact that the piston head and the piston rod which are balanced in height and the absolute oil leakage are avoided, and the axial movement between two rolling grooves is avoided when the piston rod reciprocates at high frequency.

0019. The invention can change the flow area of the damping small hole surrounded by the rotary pendulum shaft 9 and the manual adjusting screw 14 according to the requirement, and can adjust the damping coefficient steplessly.

0020. Examples of where the invention may be used include the aerospace, automotive, construction, road and bridge rail industries, among others, in mechanical engineering, ground moving vehicles, aircraft handling systems, among others.

Drawings

0021. FIG. 1 is a front view of a closed rotary vane orifice type heat balance hydraulic damper of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 4 is an enlarged partial schematic view of the rotary pendulum shaft F of FIG. 3 toward the middle of the shaft;

FIG. 5 is a B-B cross-sectional view of FIG. 2;

FIG. 6 is a C-C cross-sectional view of FIG. 1; the method comprises the steps of carrying out a first treatment on the surface of the

FIG. 7 is a D-D sectional view of FIG. 1;

FIG. 8 is an exploded assembly view of FIG. 1;

fig. 9 is an exploded view of the assembly of fig. 1.

0022. In the figure: the hydraulic oil filling device comprises a rear end cover, A2 outer cylinder shell, a 3 hydraulic thrust spring, a 4 oil filling piston, a 5 front end cover, a 6 rocker arm assembly, a 7Y-shaped movable sealing ring, an 8-angle contact ball bearing, a 9-rotation pendulum shaft, a 10-rotation pendulum blade, an 11-step spring shaft, a 12 oil filling spring, a 13 oil filling valve core, a 14-manual valve core, a 15 oil filling tool, a 16 needle bearing, a 17-movement sealing ring, an 18 circlip, an M oil filling port, an A1 upper left high-pressure cavity, an A2 lower left high-pressure cavity, a B1 upper right low-pressure cavity, a B2 lower right low-pressure cavity, a C1 radial oil path, a C3 first annular groove, a C4 variable damping hole, a C5 second annular groove, a C6 oil path channel, a C7 damping oil path, a D1 oil compensating cavity, a D1, a D3 cantilever cylinder end oil hole, a D4 piston cylinder radial oil hole, a D5 loop oil filling oil path, a D6 variable damping hole, a D7 rod end damping hole and a D8 rotation pendulum blade oil filling path.

Description of the embodiments

0023. See fig. 1-7. In the embodiments described below, a closed-type rotary pendulum blade 10 throttle-type heat balance hydraulic damper includes: through both ends screw axial fixity, the ring seals rear end cover 1 and front end housing 5 in the inner annular hole in urceolus casing 2 both ends to in the rotatory piston cylinder of urceolus damping chamber center inner ring section of thick bamboo, the pendulum blade 10 of symmetry rotation pendulum shaft 9 assembly, its characterized in that: the inner wall of the outer cylinder damping cavity is provided with a spring seat body which is opposite to the concave circular arc of the middle drum cylinder of the rotary swing blade 10, and the spring cylinder body provided with the hydraulic thrust spring 3 is radially symmetrical, so that the outer cylinder damping cavity is divided into an upper left high pressure cavity A1, an upper right low pressure cavity B1, a lower right low pressure cavity B2 and a lower left high pressure cavity A2 of the upper left rotary swing blade 10 with symmetrical left and right ends; the front end face of the oil supplementing piston 4 is provided with an oil compensating cavity D1 which provides oil supplementing pressure for a right low-pressure cavity B1 and a left lower low-pressure cavity B2 relative to the front end cover 5, working medium flow in the D1 passes through a step annular groove D2 in the front end cover 5, enters a piston necking cylinder radial oil hole D4 along an end oil hole D3, forms a loop oil supplementing oil way D5 through the piston cylinder step hole and a piston rod necking, and is communicated with a variable orifice D6 and a damping hole D7 at the rod end of an oil supplementing valve core 12, supplements an oil supplementing oil way D8 of a rotary swing blade 10 communicated with the right low-pressure cavity B1 and the left lower low-pressure cavity B2, and supplements the D1 working medium to the high-pressure cavities A1 and A2; the oil supplementing oil ways formed by D1-D8 are radially crossed and symmetrical to the rotary pendulum shaft 9 through the drum cylinder in the middle of the blade, the left inclined diameter oil ways C1 and C2 flow into the hollow cavity of the conical necking on the rotary body of the rotary pendulum shaft 9 to form a first circulation groove C3, the adjacent variable damping holes C4 are communicated with the second circulation groove C5, and the oil way channels C6 and C7 entering the radially symmetrical rotary pendulum shaft 9 flow into the low-pressure cavities B1 and B2; the rotary pendulum shaft 9 performs rotary swinging motion relative to the outer cylinder 2 through the rocker arm assembly 6, when the rotary pendulum shaft 9 rotates clockwise, when the pressure of the low-pressure cavities B1 and B2 is lower, the damping hole D7 is opened, the volumes of working media in the low-pressure cavities B1 and B2 are compressed, the working media in the oil supplementing cavities of the oil compensating cavity D1 are supplemented to the high-pressure cavities A1 and A2, the low-pressure cavities B1 and B2 are communicated with the oil path channels C6 and C7 through the oil paths of the second circulation grooves C5, the pressures of the low-pressure cavities B1 and B2 and the high-pressure cavities A1 and A2 are balanced, and the performance of the damper is stable when the environmental temperature changes.

0024. When the clockwise rotation speed of the rotary pendulum shaft 9 relative to the outer cylinder 2 is large, the volumes of working media in the low-pressure cavities B1 and B2 are compressed, working media in the oil compensating cavity D1 of the oil compensating cavity are supplemented to the high-pressure cavities A1 and A2, and the pressure is kept constant.

0025. When the rotary swing blade 10 rotates clockwise at a certain angular speed, the left volume cavity is increased in pressure due to the volume reduction, the right volume cavity is increased in volume to form partial vacuum, hydraulic oil is promoted to flow from the high-pressure cavity to the low-pressure cavity, the rotary swing blade 10 rotates and swings to enable the hydraulic oil in the left cavity to be pressed, and pressure difference is generated to act on the moving blades to form damping moment M.

0026. The rotating pendulum shaft 9 accommodates stepped barrels at two ends of the barrel, the Y-shaped movable sealing ring 7 is connected with the angular contact ball bearing 8 assembled in the central ring blind hole bearing of the front end cover 5, the lip of the sealing ring seals the output shaft of the piston barrel, and the outer barrel shell 2 extends out to be connected with the rocker arm assembly 6. The Y-shaped movable sealing ring is designed through rotary movable sealing, and the starting friction moment of the damper can be reduced by utilizing the characteristic of small compression force of lip sealing of the Y-shaped movable sealing ring.

0027. The two ends of the horizontal plane symmetry axis of the stepped cylinder body of the piston rod containing cylinder assembled in the damping cavity of the outer cylinder are assembled with an oil supplementing spring 12 restrained between the stepped spring shaft 11 and the oil supplementing valve core 13 and providing precompression for the oil supplementing valve core 13, and the extending end of the oil supplementing valve core 13 is provided with a V-shaped tapered annular groove symmetrically coupled with the rotation surface of the rotary pendulum shaft 9 and provided with a variable orifice D6.

0028. A V-shaped tapered groove is formed in a part of the manual adjusting valve core 14 connected with the rocker arm connecting shaft, a through flow section which is more similar to a circular throttle hole with a variable section is formed by surrounding the rotary pendulum shaft 9, the through flow area of a damping small hole formed by surrounding the axial relative position of the throttle hole and the rotary pendulum shaft 9 and a manual adjusting screw is changed, the opening of the V-shaped tapered groove is further changed, the large-scale stepless adjustment of the damping performance external field is realized, and the damping performance is more stable.

0029. See fig. 8. The rear end cover 1 seals the needle bearing 17 in an end cover ring groove with a flanging ring through a circumferential screw 16 on the cover plate, a sealing ring in an outer ring groove of the rear end cover 1 is sealed in a stepped hole in the outer cylinder shell 2, the front end cover 5 is sealed in a stepped M oiling hole in the outer cylinder shell 2 through a sealing ring in the outer ring groove, and the outer cylinder shell 2 between the rear end cover 1 and the front end cover 5 forms a damping cavity.

0030. The oiling mode of the damper is as follows: the rear end cover 1 and the outer cylinder 2 are tightly screwed and fixed through a screw 16; the hydraulic thrust spring 3 and the oil supplementing piston 4 are arranged in an oil supplementing cavity D1 of the outer cylinder shell 2, the manual adjusting screw 14 with the movable sealing ring 17 is screwed in, and the elastic retainer ring 18 is arranged and then the oiling tool 15 is disassembled.

0031. In order to ensure that the inside of the damper cavity is full of oil, and the oil in the oil supplementing cavity is full of oil, the oil storage capacity in the oil supplementing cavity of the compensating cavity D1 is ensured. An oiling tool 15 which radially penetrates through the barrel body and is connected with the spring barrel is arranged on the barrel body of the outer barrel body 2 at one end of the adjacent front end cover 5, after the oil supplementing piston 4 at one end is started to compress to the limit, the oiling tool 15 is used for positioning, the extending end of the rotary pendulum shaft 9 is kept vertically upwards, the redundant working medium filled with the working medium by the oil filling port M is discharged from the oil discharge port N, the pressure of the two oil supplementing cavities is balanced, the compression lengths of the springs are equal, and the two oil supplementing cavities can supplement oil for the damping cavity together.

0032. See fig. 9. The manual adjusting valve core 14 sleeved with the sealing ring 17 and the elastic retainer ring 18 on the rod body is assembled in the front oil drain port N hole through the rotary pendulum shaft 9 of the assembly hole, and an adjustable damping hole is formed between the end face of the rotary pendulum shaft 9 and the end face. The front end of the manual valve core 14 is provided with a V-shaped tapered annular groove, the manual valve core 14 is rotated, the opening of the V-shaped tapered annular groove of the manual valve core 14 is changed, the damping performance is adjusted in a stepless manner in a large range in an external field, and the stability of a working load is ensured. The rotary pendulum shaft 9 is made of a metal material, the manual adjusting valve core 14 is made of a plastic material with a higher thermal expansion coefficient, and the position of the rotary pendulum shaft 9 is changed by rotating the manual adjusting valve core 14, so that the manual adjustment of the damping coefficient can be realized. When the temperature is changed, the length change rate of the manual adjusting valve core 14 is large in comparison with the rotary pendulum shaft 9, so that the stability of the damping performance of the temperature change is realized.

0033. The damping hole described in the above embodiment mainly controls the pressure change of the oil to achieve the desired control pressure, and the orifice mainly controls the flow rate of the oil to achieve the desired control flow rate.

0034. In the motion of the mechanical system, through the motion of the oil supplementing piston 4 in the damper, the liquid in the damping cylinder is forced to flow through the small holes or gaps of the compensating cavities D1-D8, or the combination damping element of the two, when the instantaneous impact load occurs and the speed V of the rotating pendulum shaft 9 increases to reach the locking speed V, the hydraulic oil pushes the valve core 13 to be closed, the hydraulic oil can only flow through the small holes of the throttle valve to form damping force FN, the damper is locked, the liquid molecules are mutually extruded and rubbed, the damping effect is generated, the mechanical energy is converted into heat energy to be dissipated, and vibration reduction and vibration resistance are realized. Under normal working condition, the speed V of the piston rod is less than the locking speed V, the acting force on the pipeline is small, and f is less than 1-2% FN.

0035. The foregoing describes in detail embodiments of the present invention, which are described herein using specific embodiments, the description of the embodiments being merely intended to aid in the understanding of the methods and apparatus of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. A closed pendulum blade orifice heat balance hydraulic damper comprising: through both ends screw axial fixity, rear end cap (1) and front end housing (5) in the annular ring hole in urceolus casing (2) both ends are sealed to piston cylinder that rotates in urceolus damping chamber center inner ring section of thick bamboo, pendulum blade (10) of symmetry rotation pendulum axle (9) assembly, its characterized in that: the inner wall of the damping cavity of the outer cylinder is provided with a spring seat body which is opposite to the concave circular arc of the drum cylinder in the middle of the rotary swing blade (10), the spring cylinder body provided with the hydraulic thrust spring 3 is radially symmetrical, and the damping cavity of the outer cylinder is divided into a left upper high pressure cavity A1, a right upper low pressure cavity B1, a right lower low pressure cavity B2 and a left lower high pressure cavity A2 of which the left and right ends are symmetrically provided with the rotary swing blade (10); the front end face of the oil supplementing piston (4) is provided with an oil compensating cavity D1 which provides oil supplementing pressure for a right low-pressure cavity B1 and a left lower low-pressure cavity B2 relative to a front end cover (5), working medium flow in the D1 passes through a step annular groove D2 in the front end cover (5), enters a radial oil hole D4 of a piston necking cylinder along an oil hole D3, forms a loop oil supplementing oil way D5 through the step hole of the piston cylinder and the necking of a piston rod, and is communicated with a variable orifice D6 and a rod end damping hole D7 of an oil supplementing valve core (12), and supplements an oil supplementing oil way D8 of a rotary swing blade (10) communicated with the right low-pressure cavity B1 and the left lower low-pressure cavity B2 to supplement the D1 working medium to the high-pressure cavities A1 and A2; D1-D8 form make-up oil way through the radial cross symmetrical left inclined diameter oil way C1-C2 of drum cylinder in the middle part of the blade, flow into the hollow cavity of conical necking on the revolution body of the rotary pendulum shaft (9) and form the first circulation groove C3, connect adjacent variable damping hole C4, flow into the second circulation groove C5, then enter the right inclined diameter oil way C6-C7 of the radial symmetrical rotary pendulum shaft (9), flow into low-pressure cavity B1, B2; the rotary pendulum shaft (9) rotates and swings through the rocker arm assembly (6) relative to the outer cylinder (2), when the rotary pendulum shaft (9) rotates clockwise, when the pressure of the low-pressure cavity B1 and the low-pressure cavity B2 is lower, the damping hole D7 is opened, the volume of working media in the low-pressure cavity B1 and the low-pressure cavity B2 is compressed, working media in the oil compensating cavity D1 are supplemented to the high-pressure cavities A1 and A2, the right inclined-diameter oil way C6-C7 is communicated through the second circulation groove C5 oil way, the pressure of the damper cavity of the low-pressure cavity B1 and the low-pressure cavity B2 and the high-pressure cavity A1 and the high-pressure cavity A2 is balanced, and the performance of the damper is stable when the environmental temperature changes.

2. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: when the clockwise rotation speed of the rotary pendulum shaft (9) relative to the outer cylinder (2) is high, the volumes of working media in the low-pressure cavities B1 and B2 are compressed, working media in the oil compensating cavity D1 of the oil compensating cavity are supplemented to the high-pressure cavities A1 and A2, and the pressure is kept constant.

3. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: when the rotary swing vane (10) rotates clockwise at a certain angular speed, the pressure of the left volume cavity is increased due to the volume reduction, the pressure of the right volume cavity is increased to form partial vacuum, the hydraulic oil is promoted to flow from the high pressure cavity to the low pressure cavity, the rotation of the moving vane is carried out, the hydraulic oil in the left cavity is pressed, and the pressure difference is generated to act on the moving vane to form damping moment M.

4. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: the stepped barrels are arranged at the two ends of the piston rod accommodating barrel, the Y-shaped movable sealing ring (7) is connected through the angular contact ball bearing (8) assembled in the central ring blind hole bearing of the front end cover (5), the lip of the sealing ring seals the output shaft of the piston barrel, and the outer barrel shell (2) extends out to be connected with the rocker arm assembly (6).

5. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: the needle bearing (16) is packaged in an end cover ring groove with a flanging ring through a circumferential screw on the cover plate by the rear end cover (1), a sealing ring in an outer ring groove of the rear end cover (1) is sealed in an inner stepped hole of the outer cylinder shell (2), the front end cover (5) is sealed in an inner stepped M oiling hole of the outer cylinder shell (2) through a sealing ring in the outer ring groove, and a damping cavity is formed by the outer cylinder shell (2) between the rear end cover (1) and the front end cover (5).

6. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: the oiling mode of the damper is as follows: the rear end cover (1) and the outer cylinder (2) are tightly screwed and fixed through screws; the device comprises an angular contact ball bearing (8), a Y-shaped movable sealing ring (7), a needle bearing (16) and a rotary pendulum shaft (9), wherein a front end cover (5) is fixed by screwing with an outer cylinder shell (2), a hydraulic thrust spring (3) and an oil supplementing piston (4) are arranged in an oil supplementing cavity D1 of the outer cylinder shell (2), a manual adjusting screw (14) with a movable sealing ring (17) is screwed in, and an elastic retainer ring (18) is arranged in the manual adjusting screw, and then an oiling tool (15) is detached.

7. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: an oiling tool (15) which radially penetrates through the barrel body and is connected with the spring barrel is arranged on the barrel body of the outer barrel body (2) at one end of the adjacent front end cover (5), after an oiling piston (4) at one end is started to compress to the limit, the oiling tool (15) is used for positioning, the extending end of the rotary pendulum shaft (9) is kept vertically upwards, redundant working medium filled with the working medium is discharged from the oil discharge port N through the oil injection port M, the pressure of the two oiling cavities is balanced, the compression length of the springs is equal, and the two oiling cavities are used for supplementing oil for the damping cavity together.

8. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: a V-shaped tapered groove is formed in a part of a manual adjusting valve core (14) connected with a rocker arm connecting shaft, a through flow section which is more similar to a circular variable section orifice is formed by surrounding the rotary rocker shaft (9), the axial relative position of the rotary rocker shaft and the rotary rocker shaft (9) is changed, and the through flow area of a damping small hole which is formed by surrounding the rotary rocker shaft and a manual adjusting screw is changed, so that the opening of the V-shaped tapered groove is changed, and the damping performance external field is adjusted in a large range in an stepless mode.

9. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: the manual adjusting valve core (14) is sleeved with a sealing ring (17) and an elastic retainer ring, is assembled in an assembly hole of the rotary pendulum shaft (9) through an oil drain hole N at the front end, and forms an adjustable damping hole on the end face of the rotary pendulum shaft (9).

10. The closed-type rotary pendulum vane orifice type heat balance hydraulic damper of claim 1, wherein: in the motion of a mechanical system, through the motion of an oil supplementing piston (4) in a damper, liquid in a damping cylinder is forced to flow through small holes or gaps of compensating cavities D1-D8, or a damping element combining the two, when the instantaneous impact load occurs, the speed V of a rotary pendulum shaft (9) increases to reach a locking speed V to be closed, hydraulic oil pushes an oil supplementing valve core (13) to be closed, hydraulic oil can only flow through small holes of a throttle valve to form damping force FN, the damper is locked, so that liquid molecules are mutually extruded and rubbed to generate damping action, and mechanical energy is converted into heat energy to be dissipated, thereby realizing vibration reduction and vibration resistance.