CN113202894B - Hydro-electric vibration energy recovery shock absorber - Google Patents
Hydro-electric vibration energy recovery shock absorber Download PDFInfo
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- CN113202894B CN113202894B CN202110421720.5A CN202110421720A CN113202894B CN 113202894 B CN113202894 B CN 113202894B CN 202110421720 A CN202110421720 A CN 202110421720A CN 113202894 B CN113202894 B CN 113202894B
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 32
- 230000035939 shock Effects 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 23
- 238000007667 floating Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 85
- 239000010720 hydraulic oil Substances 0.000 abstract description 18
- 230000006835 compression Effects 0.000 abstract description 10
- 238000007906 compression Methods 0.000 abstract description 10
- 238000013016 damping Methods 0.000 abstract description 10
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
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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
- 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
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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
- 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
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1815—Rotary generators structurally associated with reciprocating piston engines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a hydraulic-electric vibration energy recovery shock absorber which comprises a cylinder barrel, a piston rod, a piston matched with the cylinder barrel and an air bag, wherein the piston comprises a fixed shaft, an outer rotor hydraulic motor, a control oil path, a stator and a coil, the piston rod is a hollow tube, the lower end of the piston rod is rigidly connected with the fixed shaft of the piston, the output end of the coil is led out from a hollow channel of the piston rod, when the shock absorber is in a compression stroke, hydraulic oil in a lower cavity can flow to an upper cavity through the one-way control oil path, and when the shock absorber is in an extension stroke, hydraulic oil in the upper cavity enters the outer rotor hydraulic motor through the control oil path to push the outer rotor hydraulic motor to rotate to drive a permanent magnet to cut the coil to generate electricity. According to the vibration energy recovery type shock absorber, a small damping force is generated during a compression stroke of the shock absorber through the special structure of the piston, vibration energy is recovered by generating electricity during a stretching stroke of the shock absorber, stretching damping is controlled by controlling the external output resistor, and the shock absorber has the characteristics of compact structure and high energy recovery rate.
Description
Technical Field
The invention relates to the technical field of automobile shock absorbers, in particular to a hydraulic vibration energy recovery shock absorber.
Background
In recent years, with the awareness of low carbon and environmental protection, the green development concept gradually becomes a research hotspot, and the energy recovery system in the automobile field is concerned by more and more scholars. Hydraulic shock absorbers are widely used in automotive suspension systems. The hydraulic shock absorber takes hydraulic oil as a medium, and when the suspension moves back and forth relative to the vehicle body, the hydraulic oil repeatedly flows from one cavity to the other cavity through the damping hole. The friction between the damping holes and the hydraulic oil and the internal friction between liquid molecules form damping force, and the energy generated by vibration is dissipated in the air in the form of heat energy of the hydraulic oil in the shock absorber. If the vibration energy of the part can be recycled and utilized, the aim of saving energy can be achieved.
At present, the recovery and utilization of vibration energy of the vibration damper mostly adopt a form of converting hydraulic energy into electric energy. For example, the patent described in application number CN201520412035.6 is mainly composed of a hydraulic working cylinder, a first check valve, a second check valve, an accumulator, a hydraulic motor, a generator, a hydraulic pipeline, a hydraulic-electric energy feedback system, and an oil supplementing device composed of an oil storage cylinder, a compression valve, and a compensation valve. The first one-way valve, the second one-way valve, the energy accumulator and the hydraulic motor are connected through hydraulic pipelines, the hydraulic pipelines are respectively communicated with the oil outlet of the rod cavity and the oil outlet of the rodless cavity of the hydraulic working cylinder to form a hydraulic energy feedback loop, the hydraulic energy feedback loop is arranged outside the hydraulic working cylinder and drives the hydraulic motor, and the hydraulic motor drives the generator to generate electricity to achieve the purpose of energy feedback.
The hydroelectric energy feedback type shock absorber described in application No. CN201010108889 comprises a hydraulic circuit, a working chamber and a piston, wherein the working chamber is divided into a piston working chamber and an energy storage and power generation chamber by a partition plate, and a hydraulic motor is located in the energy storage and power generation chamber and is connected with an external rotary power generator through a transmission shaft. The hydraulic circuit and the plurality of one-way valves form a hydraulic rectifier bridge. When the shock absorber works, under the action of the hydraulic rectifier bridge, oil in the pressure rising side oil chamber always enters from the oil inlet of the hydraulic motor and then flows into the pressure low side oil chamber, the oil driving motor always rotates along the same direction, and the vibration mechanical energy is converted into electric energy to be stored, so that energy conservation is realized.
However, the existing vibration energy recovery device of the hydraulic shock absorber adopts a mode that a hydraulic motor is connected with a generator in series, and has the defects of large volume, large occupied installation space and the like.
Disclosure of Invention
The invention provides a hydraulic vibration energy recovery shock absorber which can convert energy of vehicle vibration into electric energy while achieving the shock absorption effect of an automobile and achieve energy recovery.
The technical scheme disclosed by the invention is as follows: a hydraulic vibration energy recovery vibration damper comprises a cylinder barrel, a piston rod, a piston matched with the cylinder barrel and an air bag, wherein a cavity in the cylinder barrel is divided into an upper cavity above the piston, a lower cavity between the piston and the floating piston and a compensation cavity for placing the air bag, the air bag elastically supports the floating piston,
the piston comprises an upper cover plate, a lower cover plate, an outer rotor hydraulic motor, a stator and a coil, the upper cover plate, the lower cover plate and the stator are fixedly connected, the outer rotor hydraulic motor and the coil are installed in a space surrounded by the upper cover plate, the lower cover plate and the stator, and the coil is fixed on the stator;
the outer rotor hydraulic motor comprises an outer rotor and a fixed shaft, the outer rotor rotates and is hermetically arranged on the fixed shaft, intervals are reserved between the outer rotor and the lower end face of the upper cover plate, the upper end face of the lower cover plate and the stator, a plurality of permanent magnets are uniformly adhered to the outer wall of the outer rotor, and magnetic poles N and magnetic poles S are arranged at intervals;
a closed cavity is formed between the outer rotor and the fixed shaft, one section of the fixed shaft positioned in the cavity is an intermediate section, the transverse section of the intermediate section is in an elliptical shape formed by two sections of long semi-axis curves, two sections of short semi-axis curves and four sections of transition curves, a tapered groove is further formed in the circumferential direction of the position of the four sections of transition curves, a radial oil duct is processed in the position of the tapered groove, the radial oil duct comprises radial oil ducts A, A 'and B, B', and an axial oil duct and an oil outlet are processed in the central axis of the fixed shaft;
the inner surface of the outer rotor corresponding to the cavity is a cylindrical surface, eight radial grooves are uniformly processed in the circumferential direction, the blades are embedded into the radial grooves of the rotor and can freely and radially slide in the radial grooves, an elastic reset mechanism is arranged between each blade and the bottom of each radial groove, long half shaft arcs at two ends are in sealing fit with the inner surface of the rotor, two short half shaft arcs are in sealing fit with the corresponding blades, four closed zones with variable volume when the rotor rotates are formed between the inner surface of the rotor and the blades corresponding to the two short half shaft arcs and between the two long half shaft arcs, the four zones are an oil inlet zone A, an oil return zone B, an oil inlet zone A 'and an oil return zone B' in sequence in the circumferential direction, and the four zones are an oil inlet zone A, A 'and an oil return zone B, B' respectively; the oil inlet regions A, A 'are respectively communicated with the axial oil passage through a radial oil passage A, A'; the oil return areas B and B 'are respectively communicated with the oil outlet hole through a radial oil duct B, B';
the part of the upper end of the fixed shaft extending out of the piston is provided with a radial oil inlet channel communicated with the axial oil channel;
an upper oil through hole which is used for communicating the upper cavity with the gap is arranged on the upper cover plate, and an upper check valve is arranged between the upper oil through hole and the upper cavity;
the lower cover plate is provided with a lower oil through hole which communicates the space with the lower cavity; a lower check valve is arranged between the lower oil through hole and the lower cavity.
On the basis of the scheme, the outer rotor preferably comprises an upper sealing plate, a lower sealing plate and a rotor, the upper sealing plate, the lower sealing plate and the rotor are fixedly connected, a sealed cavity is formed between the sealing ring and the fixed shaft in a sealing mode, the upper sealing plate and the lower sealing plate are rotatably installed on two sides of the middle section of the fixed shaft through bearings and are sealed through shaft sealing rings.
On the basis of the scheme, preferably, the upper cover plate is uniformly provided with two circles of upper oil through holes, the outer side of each upper oil through hole is covered with an upper valve plate and an upper spring, one end of each upper spring is fixed on the fixed shaft through an upper spring seat, and the other end of each upper spring is pressed on the upper valve plate, so that an upper one-way valve for preventing oil from passing from the upper cavity to the lower cavity is formed.
On the basis of the scheme, preferably, the lower cover plate is uniformly distributed with two circles of lower oil through holes; one end of the lower spring is fixed on the fixed shaft by a lower spring seat, and the other end of the lower spring is propped against the lower valve plate, so that the lower valve plate is pressed on the valve seat of the oil outlet, and the lower one-way valve for preventing oil from passing from the lower cavity to the upper cavity is formed.
On the basis of the scheme, preferably, 12 groups of coils are wound on the inner side of the stator, each 4 groups of coils are in star connection, the output ends of the coils are led out from a hollow piston rod channel, and the lower end of the piston rod is rigidly connected with the fixed shaft through a fastening screw.
In addition to the above, preferably, the elastic return mechanism is a spring.
On the basis of the scheme, preferably, the part of the upper end of the fixed shaft, which extends out of the piston, is provided with 4 radial oil inlet channels.
In addition to the above, preferably, the arc length of the tapered groove corresponds to a central angle of 45 degrees.
Compared with the prior art, the invention has the following beneficial effects:
when the shock absorber is used, the compression stroke and the extension stroke of the shock absorber have different oil paths, and in the compression stroke, hydraulic oil flows to the upper cavity from the lower cavity through the lower oil through hole, the gap between the permanent magnet and the coil and the upper oil through hole without damping, so that the damping force of the compression stroke is ensured to be as small as possible; the hydraulic oil of the upper stretching stroke cavity reaches the lower cavity through the outer rotor hydraulic motor inside the piston, the outer rotor hydraulic motor is pushed to rotate in the process to form a rotating magnetic field cutting coil to generate electricity, hydraulic energy is converted into electric energy to be stored, and the stretching stroke damping force is controlled by controlling an external load resistor.
According to the invention, the hydraulic motor is embedded into the power generation device, the hydraulic motor and the power generation device form the piston, the integration of mechanism elements is high, the energy loss in the oil liquid circulation process is avoided, and the space utilization rate is improved while the higher energy feedback effect is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the interior cross-section of the piston of the present invention;
FIG. 3 is a schematic view of the upper cover plate of the piston of the present invention;
fig. 4 is a schematic view of the lower piston cover plate of the present invention.
The reference numbers are as follows: 2. A cylinder barrel; 3. an air bag; 4. a floating piston; 5. a lower cover plate; 6. a screw; 7. a stator; 8. a coil; 9. an upper cover plate; 10. an upper valve plate; 12. an upper spring; 13. a spring seat; 14. fixing a shaft; 15. an end cap; 16. a guide sleeve; 17. a piston rod; 18. fastening screws; 19. an oil inlet channel; 20. an axial oil passage; 21. an upper oil through hole; 22. a shaft seal ring; 23. a bearing; 24. an upper sealing plate; 25. a radial oil passage; 26. a lower sealing plate; 27. a lower oil through hole; 28. an oil outlet hole; 29. a lower valve plate; 30. a lower spring; 33. a blade; 34. a rotor; 35. and a permanent magnet.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
As shown in fig. 1-2, the invention relates to a hydro-electric vibration energy recovery shock absorber, which comprises a cylinder barrel 2, a piston rod 17, a piston matched with the cylinder barrel and an air bag 3. The cylinder 2 is divided into three parts by a piston and a floating piston 4, namely an upper cavity, a lower cavity and a compensation cavity formed by the air bag 3. The compensation cavity is mainly used for eliminating the change of the volume of hydraulic oil caused by the piston rod in the extension stroke and the compression stroke of the shock absorber.
The piston comprises an upper cover plate 9, a lower cover plate 5, an outer rotor hydraulic motor, a stator 7 and a coil 8; the upper cover plate 9 and the lower cover plate 5 are fastened by a screw 6 and a stator 7, and an outer rotor hydraulic motor and a coil 8 are arranged between the upper cover plate 9 and the lower cover plate 5.
The outer rotor hydraulic motor includes an outer rotor (upper seal plate 24, lower seal plate 26, blades 33, and rotor 34), a fixed shaft 14; the upper sealing plate 24 and the lower sealing plate 26 are fastened with the rotor 34 through bolts and sealed by sealing rings to form a closed cavity; an upper sealing plate 24 and a lower sealing plate 26 are arranged on two sides of the middle section of the fixed shaft 14 by adopting bearings 23 and are sealed by a shaft sealing ring 22 to form an outer rotor and rotate around the fixed shaft 14; eight permanent magnets are uniformly adhered to the outer wall of the outer rotor, wherein the magnetic poles N and the magnetic poles S are arranged at intervals.
The central axis of the fixed shaft 14 is provided with an axial oil passage 20 (oil inlet) and an oil outlet 28, and the transverse section of the middle section of the fixed shaft 14 matched with the rotor 34 is in an elliptical shape formed by two sections of long half shafts, four sections of transition curves and two sections of short half shafts; a tapered groove is further formed in the circumferential direction of the four transition curve positions of the fixed shaft 14, the arc length of the tapered groove is 45 degrees corresponding to the central angle, a radial oil duct is machined in the tapered groove, and the radial oil duct comprises radial oil ducts A, A 'and B, B'; the inner surface of the rotor 34 is a cylindrical surface, eight radial grooves are uniformly formed in the circumference of the rotor, and the blades 33 are embedded into the corresponding grooves of the rotor 34 and can freely and radially slide; the outer surface of the elliptical section of the fixed shaft 14, the inner surface of the rotor 34 and the two adjacent blades 33 form four areas with variable closed volumes, as shown in fig. 2, namely an oil inlet area A, A 'and an oil return area B, B'; the oil inlet areas A and A 'are respectively communicated with the axial oil duct 20 through a tapered groove and radial oil ducts A2501 and A' 2502; the oil return areas B and B 'are respectively communicated with the oil outlet hole 28 through the tapered groove and the radial oil passages B2801 and B' 2802.
The part of the upper end of the fixed shaft 14 extending out of the piston is provided with four radial oil inlet channels 19 communicated with an axial oil channel 20; the upper cover plate 9 is uniformly distributed with two circles of upper oil through holes 21, the outer side of the upper oil through holes 21 is covered with an upper valve plate 10 and an upper spring 12, one end of the upper spring 12 is fixed on a fixed shaft 14 by an upper spring seat 13, and the other end is pressed on the upper valve plate 10 to form an upper one-way valve for preventing oil from passing from an upper cavity to a lower cavity; the lower cover plate 5 is evenly distributed with two circles of lower oil through holes 27; one end of a lower spring 30 is fixed on the fixed shaft 14 by a lower spring seat 31, and the other end of the lower spring abuts against a lower valve plate 29, so that the lower valve plate 29 is pressed on a valve seat of the oil outlet 28, and a lower one-way valve for preventing oil from passing from the lower cavity to the upper cavity is formed.
12 groups of coils 8 are wound on the inner side of the stator 7, each 4 groups are one, star connection is adopted, the output ends of the coils 8 are led out from a hollow piston rod 17 channel, and the lower end of the piston rod 14 is rigidly connected with the fixed shaft 14 through a fastening screw 18.
A circumferential gap is formed between the outer rotor and the stator 7, and axial gaps are formed between the outer rotor and the lower cover plate 5 and the upper cover plate 9, so that the outer rotor can be ensured to rotate freely relative to the lower cover plate 5, the upper cover plate 9 and the stator 7.
Compression stroke: the wheels move close to the vehicle body, the cylinder barrel 2 moves upwards relative to the piston rod 17 under the guiding action of the guide sleeve 16, the shock absorber is compressed, the volume of the lower cavity of the cylinder barrel 2 is reduced, the pressure of hydraulic oil is increased, the volume of the upper cavity is increased, the pressure of the hydraulic oil is reduced, and a pressure difference is formed; the hydraulic oil in the lower chamber flows in from the lower oil through hole 27 of the lower cover plate 5, flows through the circumferential gap between the permanent magnet 35 and the stator 7 and the axial gap between the outer rotor and the upper cover plate 9, flows out from the upper oil through hole 21, compresses the upper spring 12 (which is soft), and pushes the upper valve plate 10 open into the upper chamber. In the process, the oil outlet 28 is in a closed state under the pressure action of the spring 30 and the hydraulic oil in the lower cavity, and the outer rotor motor does not rotate and does not recover energy.
Due to the existence of the piston rod 17, in the compression stroke, the piston rod 17 occupies a part of the volume of the upper cavity, the reduced volume of the lower cavity is larger than the increased volume of the upper cavity, so that the volume of the upper cavity is insufficient, hydraulic oil can push the floating piston 4 to move downwards, the air bag 3 is compressed, and the insufficient volume of the upper cavity is automatically compensated.
Stretching stroke: the wheels are far away from the vehicle body, the cylinder barrel 2 moves downwards relative to the piston rod 17 under the guiding action of the guide sleeve 16, the shock absorber is stretched, the pressure of hydraulic oil in a lower cavity of the cylinder barrel 2 is reduced, the pressure of hydraulic oil in an upper cavity is increased, and a pressure difference is formed; under the action of upper cavity pressure and an upper spring 12, an upper oil through hole is sealed by an upper valve plate 11, upper cavity hydraulic oil flows in from four radial oil inlet channels 19 on a fixed shaft 14 and enters an oil inlet area A, A 'through an axial oil channel 20 and radial oil channels A2501 and A' 2502, a blade 33 is pushed to drive a rotor 34 to rotate, and the rotor 34 drives an upper sealing plate 24, a lower sealing plate 26 and a permanent magnet 35 to rotate together to cut a coil 8 to generate electricity; the hydraulic oil with pressure loss moves to the oil return areas B and B ', and pushes away the valve plate 29 from the oil outlet hole 28 through the radial oil passages B2801 and B' 2802 to flow out into the lower cavity.
Also, due to the existence of the piston rod 17, in the extension stroke, the volume of the lower cavity is increased to be larger than the volume of the upper cavity, and the air bag 3 pushes the floating piston 4 to move upwards, so that the change of the volume is automatically compensated.
According to the hydro-electric vibration energy recovery shock absorber, through the special structural design of the piston, a small damping force is generated during the compression stroke of the shock absorber, the vibration energy is recovered through power generation during the extension stroke of the shock absorber, and the extension stroke damping force is controlled by controlling the resistance value of the externally-connected output load. And because the rotor of the hydraulic motor is positioned outside, the surface area for mounting the magnetic poles is larger, the generating efficiency is higher under the condition of the same volume, and the hydraulic motor has the characteristics of compact structure and high energy recovery rate.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A hydraulic vibration energy recovery shock absorber is characterized by comprising a cylinder barrel, a piston rod, a piston matched with the cylinder barrel and an air bag, wherein a cavity in the cylinder barrel is divided into an upper cavity above the piston, a lower cavity between the piston and a floating piston and a compensation cavity for placing the air bag by the piston and the floating piston, the air bag elastically supports the floating piston,
the piston comprises an upper cover plate, a lower cover plate, an outer rotor hydraulic motor, a stator and a coil, the upper cover plate, the lower cover plate and the stator are fixedly connected, the outer rotor hydraulic motor and the coil are installed in a space surrounded by the upper cover plate, the lower cover plate and the stator, and the coil is fixed on the stator;
the outer rotor hydraulic motor comprises an outer rotor and a fixed shaft, the outer rotor rotates and is hermetically arranged on the fixed shaft, intervals are reserved between the outer rotor and the lower end face of the upper cover plate, the upper end face of the lower cover plate and the stator, a plurality of permanent magnets are uniformly adhered to the outer wall of the outer rotor, and magnetic poles N and magnetic poles S are arranged at intervals;
a closed cavity is formed between the outer rotor and the fixed shaft, one section of the fixed shaft positioned in the cavity is an intermediate section, the transverse section of the intermediate section is in an elliptical shape formed by two sections of long semi-axis curves, two sections of short semi-axis curves and four sections of transition curves, a tapered groove is further formed in the circumferential direction of the position of the four sections of transition curves, a radial oil duct is processed in the position of the tapered groove, the radial oil duct comprises radial oil ducts A, A 'and B, B', and an axial oil duct and an oil outlet are processed in the central axis of the fixed shaft;
the inner surface of the outer rotor corresponding to the cavity is a cylindrical surface, eight radial grooves are uniformly processed in the circumferential direction, the blades are embedded into the radial grooves of the rotor and can freely and radially slide in the radial grooves, an elastic reset mechanism is arranged between each blade and the bottom of each radial groove, two sections of long half shaft arcs are in sealing fit with the inner surface of the rotor, two sections of short half shaft arcs are in sealing fit with the corresponding blades, four closed zones with variable volume when the rotor rotates are formed between the inner surface of the rotor and the blades corresponding to the two sections of short half shaft arcs and between the two sections of long half shaft arcs, the four zones are an oil inlet zone A, an oil return zone B, an oil inlet zone A 'and an oil return zone B' in sequence in the circumferential direction, and the four zones are an oil inlet zone A, A 'and an oil return zone B, B' respectively; the oil inlet regions A, A 'are respectively communicated with the axial oil passage through a radial oil passage A, A'; the oil return areas B and B 'are respectively communicated with the oil outlet hole through a radial oil duct B, B';
the part of the upper end of the fixed shaft extending out of the piston is provided with a radial oil inlet channel communicated with the axial oil channel;
an upper oil through hole which is used for communicating the upper cavity with the gap is arranged on the upper cover plate, and an upper check valve is arranged between the upper oil through hole and the upper cavity;
the lower cover plate is provided with a lower oil through hole which communicates the space with the lower cavity; a lower check valve is arranged between the lower oil through hole and the lower cavity.
2. The electrohydraulic vibration energy recovery shock absorber of claim 1 wherein the outer rotor includes an upper seal plate, a lower seal plate, a rotor, the upper seal plate, the lower seal plate, the rotor are fixedly connected and sealed with a seal ring and a fixed shaft to form a closed chamber, the upper seal plate and the lower seal plate are rotatably mounted on opposite sides of a middle section of the fixed shaft by bearings and sealed with shaft seal rings.
3. The electrohydraulic vibration energy recovery absorber of claim 1 wherein the upper cover plate has two evenly spaced circles of upper oil through holes, the outer side of the upper oil through holes being covered by an upper valve plate and an upper spring, one end of the upper spring being fixed to the fixed shaft by an upper spring seat and the other end of the upper spring being pressed against the upper valve plate to form an upper check valve preventing oil from passing from the upper chamber to the lower chamber.
4. The electrohydraulic vibration energy recovery shock absorber of claim 1 wherein the lower cover plate has two evenly distributed rings of lower oil through holes; one end of the lower spring is fixed on the fixed shaft by a lower spring seat, and the other end of the lower spring is propped against the lower valve plate, so that the lower valve plate is pressed on the valve seat of the oil outlet, and the lower one-way valve for preventing oil from passing from the lower cavity to the upper cavity is formed.
5. The electrohydraulic vibration energy recovery shock absorber of claim 1 wherein 12 sets of coils are wound inside the stator, one for each 4 sets, in a star connection, the output ends of the coils are led out from the hollow piston rod channel, and the lower end of the piston rod is rigidly connected to the fixed shaft by a fastening screw.
6. The electrohydraulic vibration energy recovery damper of claim 1 wherein the resilient return mechanism is a spring.
7. The electrohydraulic vibration energy recovery damper of claim 1 wherein the portion of the fixed shaft having the piston extending therefrom has 4 radial oil feed passages.
8. The hydro-electric vibration energy recovery damper of claim 1 wherein the arc length of the tapered slot corresponds to a central angle of 45 degrees.
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| CN113847380A (en) * | 2021-09-06 | 2021-12-28 | 上海跨悦信息技术有限公司 | Self-energy-feeding damping force adjustable electric control shock absorber system |
| CN114382818B (en) * | 2022-01-25 | 2023-03-28 | 上海交通大学 | Vibration-suppressing hydro-electric hybrid actuator and control method thereof |
| CN117595604B (en) * | 2024-01-18 | 2024-04-12 | 东营千禧龙科工贸有限公司 | Vibration generator for pipeline |
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