CN114233699A - Separable hydraulic cylinder double-acting energy feedback system and method thereof - Google Patents
Separable hydraulic cylinder double-acting energy feedback system and method thereof Download PDFInfo
- Publication number
- CN114233699A CN114233699A CN202111317610.0A CN202111317610A CN114233699A CN 114233699 A CN114233699 A CN 114233699A CN 202111317610 A CN202111317610 A CN 202111317610A CN 114233699 A CN114233699 A CN 114233699A
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- oil
- motor
- hydraulic cylinder
- energy feedback
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims 1
- 238000005381 potential energy Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 14
- 230000005611 electricity Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007659 motor function Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
- F05B2220/7064—Application in combination with an electrical generator of the alternating current (A.C.) type
- F05B2220/70642—Application in combination with an electrical generator of the alternating current (A.C.) type of the synchronous type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a separable double-acting energy feedback system and method for a hydraulic cylinder. The oil motor, the motor and the oil pump are respectively provided with a first rotating shaft, a second rotating shaft and a third rotating shaft, two ends of the second rotating shaft respectively penetrate through the left side surface and the right side surface of the motor, the left end of the second rotating shaft and the first rotating shaft are connected through a separable coupling assembly, and the right end of the second rotating shaft and the third rotating shaft are connected through a separable coupling assembly. The invention has the beneficial effects that: the potential energy of the hydraulic return oil can be converted into electric energy.
Description
Technical Field
The invention relates to the technical field related to hydraulic cylinders, in particular to a separable double-acting energy feedback system and a method for a hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device. The damping device and the exhaust device are determined according to specific application occasions, and other devices are necessary. The hydraulic cylinder has three types, namely a piston cylinder, a plunger cylinder and a swing cylinder, wherein the piston cylinder and the plunger cylinder realize reciprocating linear motion and output speed and thrust, and the swing cylinder realizes reciprocating swing and outputs angular speed (rotating speed) and torque.
The dead weight and the external load can form great potential energy when the existing vertical installation type hydraulic cylinder falls, and the conventional oil way is a direct oil return tank, so that energy waste is easily caused.
Disclosure of Invention
The invention provides a separable double-acting energy feedback system and a method for a hydraulic cylinder, which can convert potential energy of hydraulic return oil into electric energy and aims to overcome the defect that energy is wasted because pressure oil in the hydraulic cylinder directly returns to an oil tank when a piston in a vertically-mounted hydraulic cylinder falls down in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a separable double-acting energy feedback system of a hydraulic cylinder comprises an oil tank, the hydraulic cylinder, an oil motor, an oil pump and a motor, the top of the hydraulic cylinder and the bottom of the hydraulic cylinder are respectively provided with a pipeline connector I and a pipeline connector II, the oil tank is communicated with the first pipeline interface through a first oil supply pipe, the second pipeline interface is communicated with the oil motor, the oil motor is communicated with the oil tank through a first oil return pipe, the oil tank and the oil pump as well as the oil pump and the pipeline interface II are sequentially communicated through an oil supply pipe II, the first pipeline interface is communicated with the oil tank through a second oil return pipe, the first rotating shaft, the second rotating shaft and the third rotating shaft are respectively arranged on the oil motor, the motor and the oil pump, the two ends of the second rotating shaft are respectively communicated with the left side surface and the right side surface of the motor, and the left end of the second rotating shaft is connected with the first rotating shaft, and the right end of the second rotating shaft is connected with the third rotating shaft through separable coupling assemblies.
The hydraulic cylinder is a vertically-mounted hydraulic cylinder; the hydraulic cylinder is arranged above the oil motor, and the oil motor is arranged above the oil tank; the motor functions in both directions, either as a motor or as a generator. When the motor is used as a motor, the second rotating shaft and the third rotating shaft are fixedly connected and separated from each other through the separable coupling assembly, when the oil pump works, the third rotating shaft on the oil pump rotates to pump oil into the hydraulic cylinder from the oil tank through the second oil supply pipe, so that a piston rod on the hydraulic cylinder moves upwards, and meanwhile, the second rotating shaft on the motor is driven to synchronously rotate; when needs are as the generator, make pivot two and pivot one fixed connection and make pivot two and pivot three-phase separation through detachable shaft coupling subassembly, when the pneumatic cylinder whereabouts oil return, the pressure oil of pneumatic cylinder bottom can be under gravity and external load's effect, through returning oil pipe in oil motor flows back the oil tank once, and when pressure oil flows through oil motor, can promote the pivot one on the oil motor and rotate, and then drive two synchronous rotations of pivot on the motor, make the motor begin to generate electricity, can reach the purpose that changes the potential energy of hydraulic pressure oil return into the electric energy through such design, the waste of resource has been reduced. Simple structure and convenient implementation.
As preferred, still include the bottom plate, be fixed with the motor cabinet on the bottom plate, the up end at the motor cabinet is fixed to the motor, be equipped with the bottom plate spout on the bottom plate, the left and right sides of motor cabinet is arranged respectively in to the bottom plate spout, sliding connection has the sliding seat on the bottom plate spout, oil pump and oily motor are fixed respectively on two sliding seats, all be fixed with the separation hydro-cylinder on the left and right sides face of motor cabinet, two sliding seats respectively with the piston rod fixed connection of two separation hydro-cylinders. The first rotating shaft, the second rotating shaft and the third rotating shaft are located on the same straight line, the oil motor is driven to move by starting the separation oil cylinder on the left side, separation or fixation of the second rotating shaft and the third rotating shaft is achieved, the oil pump is driven to move by starting the separation oil cylinder on the right side, separation or fixation of the second rotating shaft and the first rotating shaft is achieved, and switching is automatically switched according to ascending and descending states of the hydraulic cylinder. Through the design of bottom plate spout and sliding seat, played the guide effect to the removal of oil motor and the removal of oil pump.
As preferred, detachable shaft coupling subassembly is including arranging the pivot spout on the both ends face about pivot two in, pivot spout and pivot first phase-match on the two left end faces of pivot, the pivot spout and the pivot three-phase matching on the two right end faces of pivot, it has a plurality of side spout to be annular evenly distributed on the inside wall of pivot spout, install the bayonet lock in the side spout, all be equipped with on the lateral wall of pivot one and on the lateral wall of pivot three with bayonet lock assorted draw-in groove. In a natural state: the first rotating shaft and the third rotating shaft are respectively inserted into rotating shaft chutes on the left end surface and the right end surface of the second rotating shaft and are in clamping connection with the second rotating shaft through the matching of the clamping pins and the clamping grooves; when a piston rod on the hydraulic cylinder moves upwards, the separation oil cylinder on the left side is started, the second rotating shaft and the first rotating shaft are separated (at the moment, a bayonet lock in a sliding groove of the rotating shaft on the left side is automatically separated from a clamping groove on the first rotating shaft), the motor and the oil motor are further separated, then the oil pump works, the piston rod on the hydraulic cylinder moves upwards, the motor is driven to work at the same time, and the separation oil cylinder on the left side automatically resets after the upwards movement is finished; when a piston rod on the hydraulic cylinder falls, the separation oil cylinder on the right side is started, the second rotating shaft and the third rotating shaft are separated (the bayonet lock in the sliding groove of the rotating shaft on the right side is automatically separated from the clamping groove in the third rotating shaft at the moment), the motor and the oil pump are further separated, then the oil motor is pushed to work through pressure oil falling back, the motor is driven to generate electricity, and the separation oil cylinder on the right side automatically resets after the falling is finished.
As preferred, the shape of bayonet lock is the cuboid, still be equipped with the spring in the side spout, the one end of spring and the bottom surface of sideslip groove are connected, the other end of spring and the one end of bayonet lock are connected, the other end of bayonet lock just is located the other end that is close to pivot spout bottom surface one side and bayonet lock and just is located and keeps away from pivot spout bottom surface one side and all is equipped with the fillet, the shape of draw-in groove and the shape phase-match of the bayonet lock other end. The spring plays the effect of being connected of bayonet lock and side spout, can push up the bayonet lock in draw-in groove department simultaneously. Through the shape design of the clamping pin, the first rotating shaft (or the third rotating shaft) and the second rotating shaft can be smoothly separated or clamped, and the first rotating shaft (or the third rotating shaft) can be always stably clamped in the rotating shaft sliding groove of the second rotating shaft when the second rotating shaft is driven to rotate by the first rotating shaft (or the third rotating shaft).
As preferred, be equipped with the side cavity with sideslip groove phase-match in the pivot two, the side cavity is arranged in the side of side spout and all side spouts and all side cavities and is all located the coplanar, be equipped with logical groove and through-hole between side spout and the side cavity, be equipped with the kicking block in the sideslip groove, wherein one side of kicking block and the other end fixed connection of spring, be equipped with the first and second inclined plane of direction that match each other between the another side of kicking block and the terminal surface of bayonet lock one end respectively, be fixed with on the kicking block with lead to groove assorted depression bar one, depression bar one passes to lead to the groove and arrange in the side cavity and with lead to groove sliding connection, be equipped with on the bayonet lock with through-hole assorted depression bar two, be equipped with on the lateral wall of bayonet lock with the one end assorted axial spout of depression bar two, the one end of depression bar two is installed on the axial spout and rather than sliding connection, the other end of the first pressing rod and the second pressing rod penetrate through the through hole, are arranged in the side cavity and are in sliding connection with the through hole, a torsion spring seat is fixed in the side cavity, a swing rod is mounted on the torsion spring seat, the first pressing rod and the second pressing rod are arranged on the same side of the swing rod and are located at two ends of the swing rod respectively, and the first pressing rod and the second pressing rod are in contact with the swing rod. When the first rotating shaft (or the third rotating shaft) is inserted into the sliding groove of the rotating shaft, the bayonet lock in the side sliding groove can move towards the bottom surface of the side sliding groove under the pressure action of the side wall of the first rotating shaft (or the third rotating shaft), and the bayonet lock can move smoothly in the side sliding groove through the relative sliding design between the axial sliding groove and the second pressing rod and the relative sliding design between the through groove and the first pressing rod. When the first rotating shaft (or the third rotating shaft) drives the second rotating shaft to rotate, the bayonet lock can be pressed on the side wall (close to one side of the side cavity) of the side sliding groove under the action of the first rotating shaft (or the third rotating shaft), one end of the two pairs of swing rods of the pressing rod generates pressure, and under the action of the torsion spring seat, the other end of the swing rods can generate counter pressure on the first pressing rod and the top block, and under the action of the first guide inclined plane and the second guide inclined plane, the counter pressure is converted into outward thrust of the top block on the bayonet lock, the bayonet lock is further firmly pressed at the position of the bayonet lock through the thrust, the stability of the first rotating shaft and the third rotating shaft when the second rotating shaft is driven to rotate is improved, and vibration noise is prevented from being generated.
Preferably, the system further comprises a first energy feeding valve, a second energy feeding valve and a safety valve, wherein the first oil supply pipe and the first oil return pipe are installed on the first energy feeding valve, the second oil supply pipe and the second oil return pipe are installed on the second energy feeding valve, the oil tank is communicated with the second pipeline interface in a three-phase mode through the oil supply pipe, the first pipeline interface is communicated with the oil tank in a three-phase mode through the oil return pipe, and the third oil supply pipe and the third oil return pipe are installed on the safety valve. The energy feedback valve I plays a role in controlling the opening and closing of the oil supply pipe I and the oil return pipe I and controlling the flow rate; the energy feeding valve II plays a role in controlling the opening and closing of the oil supply pipe II and the oil return pipe II and the flow rate; by additionally arranging the bypass safety valve, once the feed system fails, the bypass loop can be automatically switched in, and the normal production of equipment is not influenced.
Preferably, the motor further comprises a frequency converter, an LCL circuit, a three-phase power grid and an AFE, wherein the motor is provided with a wire connector, the frequency converter, the LCL circuit and the three-phase power grid are sequentially connected in series, and the frequency converter and the AFE are connected in parallel. When the motor is used as a generator, the generated current can be converted into three-phase 380V and 50HZ electric energy through the processing of a frequency converter, an AFE (active front end) and an LCL (feed filter circuit), and the electric energy is transmitted back to a power grid, so that the waste of resources is reduced. By adopting the AFE, the feedback electric energy is high in quality and free of distortion, and reliable grid connection can be realized.
Preferably, the motor is of the type a permanent magnet synchronous motor. The feed effect is good, and the efficiency can reach 92%.
The invention also provides a separable double-acting energy feedback method for the hydraulic cylinder, which comprises the following steps:
step one, when the hydraulic cylinder needs to go upwards, a rotating shaft II on the motor is controlled to be connected with a rotating shaft II on the oil pump in a three-phase mode and separated from the rotating shaft I on the oil motor, then pressure oil is pumped into the hydraulic cylinder from an oil tank through an oil supply pipe II through the oil pump, and when a rotating shaft III on the oil pump rotates, the rotating shaft II on the motor is driven to synchronously rotate, so that the motor works as a motor;
and step two, when the hydraulic cylinder needs to fall down, controlling a rotating shaft two on the motor to be connected with a rotating shaft one on the oil motor and separated from a rotating shaft three phase on the oil pump, and when pressure oil in the hydraulic cylinder falls back to the oil tank through the oil motor under the action of gravity and external load, pushing the rotating shaft one on the oil motor to rotate so as to drive the rotating shaft two on the motor to synchronously rotate, and then the motor is used as a generator to start generating electricity.
The motor can be driven by the oil pump to work as a motor, and can also be driven by the oil pump to generate electricity as a generator, so that the waste of resources is reduced.
Preferably, the current generated by the motor in the second step is converted into three-phase 380V and 50HZ electric energy through the processing of a frequency converter, an AFE and an LCL circuit, and the three-phase electric energy is transmitted back to a three-phase power grid. The waste of resources is reduced.
The invention has the beneficial effects that: the potential energy of hydraulic return oil can be converted into electric energy, so that the waste of resources is reduced; the structure is simple, and the implementation is convenient; the stability of the first rotating shaft and the third rotating shaft when the second rotating shaft is driven to rotate is improved, and vibration noise is prevented from being generated; by additionally arranging the bypass safety valve, once the feed system fails, the bypass loop can be automatically switched in, and the normal production of equipment is not influenced; by adopting the AFE, the feedback electric energy is high in quality and free of distortion, and reliable grid connection can be realized; the feed effect is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structural connection diagram of a first rotating shaft, a second rotating shaft and a third rotating shaft in FIG. 1;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is an enlarged view at C in FIG. 3;
FIG. 5 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 6 is a cross-sectional view taken at D of FIG. 5;
FIG. 7 is a perspective view of the bayonet.
In the figure: 1. the hydraulic cylinder comprises a first hydraulic cylinder, a second hydraulic cylinder, a first pipeline connector, a second pipeline connector, a safety valve, a second oil supply pipe, a third oil return pipe, a 7 oil tank, a 8 bottom plate, a 9 bottom plate sliding groove, a 10 sliding seat, a 11 oil motor, a 12 rotating shaft, a first rotating shaft, a 13 separating oil cylinder, a 14 motor seat, a 15 motor, a 16 rotating shaft, a second rotating shaft, a 17 rotating shaft, a third rotating shaft, an 18 oil pump, a 19 AFE, a 20 frequency converter, a 21 three-phase power grid, a 22 LCL circuit, a 23 oil return pipe, a second oil return pipe, a 24 energy feed valve, a second oil supply pipe, a second oil return pipe, a first oil return valve, a 27 energy feed valve, a 28 oil supply pipe, a first oil supply pipe, a 29 rotating shaft sliding groove, a 31 side sliding groove, a 32 spring, a 33 clamping pin, a 34 fillet, a 35 clamping groove, a 36 guide inclined plane, a 37 jacking block, 38. the first guide inclined plane, the 39-through groove, the 40-pressure rod, the 41-swing rod, the 42-torsion spring seat, the 43-through hole, the 44-pressure rod, the 45-side cavity and the 46-axial sliding groove.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1, a separable double-acting energy feedback system for a hydraulic cylinder comprises an oil tank 7, a hydraulic cylinder 1, an oil motor 11, an oil pump 18 and a motor 15, wherein the top of the hydraulic cylinder 1 and the bottom of the hydraulic cylinder 1 are respectively provided with a first pipeline connector 2 and a second pipeline connector 3, the oil tank 7 is communicated with the first pipeline connector 2 through a first oil supply pipe 28, the second pipeline connector 3 is communicated with the oil motor 11 and the oil motor 11 are sequentially communicated with the oil tank 7 through a first oil return pipe 26, the oil tank 7 is communicated with the oil pump 18 and the oil pump 18 is communicated with the second pipeline connector 3 through a second oil supply pipe 25, the first pipeline connector 2 is communicated with the oil tank 7 through a second oil return pipe 23, the oil motor 11, the motor 15 and the oil pump 18 are respectively provided with a first rotating shaft 12, a second rotating shaft 16 and a third rotating shaft 17, two ends of the second rotating shaft 16 respectively penetrate through the left side surface and the right side surface of the motor 15, the left end of the second rotating shaft 16 is connected with the first rotating shaft 12, and the right end of the second rotating shaft 16 is connected with the third rotating shaft 17 through a separable coupling assembly.
As shown in fig. 1, the oil pump further includes a bottom plate 8, a motor base 14 is fixed on the bottom plate 8, a motor 15 is fixed on the upper end surface of the motor base 14, a bottom plate chute 9 is arranged on the bottom plate 8, the bottom plate chute 9 is respectively arranged on the left side and the right side of the motor base 14, a sliding base 10 is connected on the bottom plate chute 9 in a sliding manner, an oil pump 18 and an oil motor 11 are respectively fixed on the two sliding bases 10, separation cylinders 13 are respectively fixed on the left side and the right side of the motor base 14, and the two sliding bases 10 are respectively fixedly connected with piston rods of the two separation cylinders 13.
As shown in fig. 2 and 3, the separable coupling component includes a rotating shaft sliding groove 29 disposed on the left and right end faces of the second rotating shaft 16, the rotating shaft sliding groove 29 on the left end face of the second rotating shaft 16 is matched with the first rotating shaft 12, the rotating shaft sliding groove 29 on the right end face of the second rotating shaft 16 is matched with the third rotating shaft 17, as shown in fig. 3 and 4, a plurality of side sliding grooves 31 are uniformly distributed on the inner side wall of the rotating shaft sliding groove 29 in an annular shape, clamping pins 33 are installed in the side sliding grooves 31, and clamping grooves 35 matched with the clamping pins 33 are disposed on the side wall of the first rotating shaft 12 and the side wall of the third rotating shaft 17.
As shown in fig. 4 and 7, the bayonet 33 is a rectangular parallelepiped, a spring 32 is further arranged in the side sliding groove 31, one end of the spring 32 is connected with the bottom surface of the side sliding groove 31, the other end of the spring 32 is connected with one end of the bayonet 33, a rounded corner 34 is arranged at one side of the other end of the bayonet 33, which is close to the bottom surface of the rotating shaft sliding groove 29, and one side of the other end of the bayonet 33, which is far from the bottom surface of the rotating shaft sliding groove 29, and the shape of the bayonet 35 is matched with the shape of the other end of the bayonet 33.
As shown in fig. 5 and 6, a side cavity 45 matched with the side sliding groove 31 is arranged in the second rotating shaft 16, the side cavity 45 is arranged on the side surface of the side sliding groove 31, all the side sliding grooves 31 and all the side cavities 45 are positioned in the same plane, a through groove 39 and a through hole 43 are arranged between the side sliding groove 31 and the side cavity 45, an ejector block 37 is arranged in the side sliding groove 31, one surface of the ejector block 37 is fixedly connected with the other end of the spring 32, a first guide inclined surface 38 and a second guide inclined surface 36 which are matched with each other are respectively arranged between the other surface of the ejector block 37 and the end surface of one end of the clamping pin 33, a first pressing rod 40 matched with the through groove 39 is fixed on the ejector block 37, the first pressing rod 40 passes through the through groove 39 and is arranged in the side cavity 45 and is in sliding connection with the through groove 39, a second pressing rod 44 matched with the through hole 43 is arranged on the clamping pin 33, an axial sliding groove 46 matched with one end of the second pressing rod 44 is arranged on the axial sliding groove 46, the other end of the second compression bar 44 penetrates through the through hole 43 and is arranged in the side cavity 45 and is in sliding connection with the through hole 43, a torsion spring seat 42 is fixed in the side cavity 45, a swing rod 41 is installed on the torsion spring seat 42, the first compression bar 40 and the second compression bar 44 are arranged on the same side of the swing rod 41 and are respectively located at two ends of the swing rod 41, and the first compression bar 40 and the second compression bar 44 are both in contact with the swing rod 41.
As shown in fig. 1, the safety valve further comprises a first energy feeding valve 27, a second energy feeding valve 24 and a safety valve 4, a first oil supply pipe 28 and a first oil return pipe 26 are installed on the first energy feeding valve 27, a second oil supply pipe 25 and a second oil return pipe 23 are installed on the second energy feeding valve 24, the oil tank 7 and the second pipeline connector 3 are communicated through a third oil supply pipe 5, the first pipeline connector 2 and the oil tank 7 are communicated through a third oil return pipe 6, and the third oil supply pipe 5 and the third oil return pipe 6 are installed on the safety valve 4.
As shown in fig. 1, the electric vehicle further comprises a frequency converter 20, an LCL circuit 22, a three-phase power grid 21 and an AFE19, wherein a wire connector is arranged on the motor 15, the wire connector, the frequency converter 20, the LCL circuit 22 and the three-phase power grid 21 are sequentially connected in series, and the frequency converter 20 and the AFE19 are connected in parallel.
The motor 15 is of the permanent magnet synchronous type.
The invention also provides a separable double-acting energy feedback method for the hydraulic cylinder, which comprises the following steps:
step one, when the hydraulic cylinder 1 needs to go upwards, controlling a second rotating shaft 16 on the motor 15 to be connected with a third rotating shaft 17 on the oil pump 18 and separated from a first rotating shaft 12 on the oil motor 11, then pumping pressure oil from the oil tank 7 into the hydraulic cylinder 1 through a second oil supply pipe 25 through the oil pump 18, and driving the second rotating shaft 16 on the motor 15 to synchronously rotate when the third rotating shaft 17 on the oil pump 18 rotates, so that the motor 15 works as a motor;
and step two, when the hydraulic cylinder 1 needs to fall down, controlling the second rotating shaft 16 on the motor 15 to be connected with the first rotating shaft 12 on the oil motor 11 and separated from the third rotating shaft 17 on the oil pump 18, and when the pressure oil in the hydraulic cylinder 1 falls back to the oil tank 7 through the oil motor 11 under the action of gravity and external load, pushing the first rotating shaft 12 on the oil motor 11 to rotate so as to drive the second rotating shaft 16 on the motor 15 to synchronously rotate, wherein the motor 15 is used as a generator to start generating electricity.
Preferably, the current generated by the motor 15 in the second step is converted into three-phase 380V and 50HZ electric energy through the processing of the frequency converter 20, the AFE19 and the LCL circuit 22, and is transmitted back to the three-phase power grid 21.
The working principle is as follows:
in a natural state, the first rotating shaft 12 and the third rotating shaft 17 are respectively inserted into the rotating shaft sliding grooves 29 on the left end face and the right end face of the second rotating shaft 16 and are in clamping connection with the second rotating shaft 16 through the matching of the clamping pin 33 and the clamping groove 35.
When the piston rod on the hydraulic cylinder 1 needs to move upwards, the rotating shaft II 16 and the rotating shaft I12 are separated by starting the separation oil cylinder 13 on the left side (the bayonet 33 in the rotating shaft sliding groove 29 on the left side can be automatically separated from the bayonet 35 on the rotating shaft I12), and then the motor 15 and the oil motor 11 are separated. At this time, the oil pump 18 operates, the third rotating shaft 17 starts to rotate, pressure oil is pumped into the hydraulic cylinder 1 from the oil tank 7 through the second oil supply pipe 25, a piston rod on the hydraulic cylinder 1 moves upwards, the second rotating shaft 16 on the motor 15 is driven to synchronously rotate, the motor 15 serves as a motor, and the left separation oil cylinder 13 automatically resets after the piston rod on the hydraulic cylinder 1 moves upwards.
When the piston rod on the hydraulic cylinder 1 needs to fall down, the right separation oil cylinder 13 is started to separate the second rotating shaft 16 and the third rotating shaft 17 (the bayonet 33 in the right rotating shaft sliding groove 29 can be automatically separated from the bayonet 35 on the third rotating shaft 17), and then the motor 15 and the oil pump 18 are separated. When the hydraulic cylinder 1 falls and returns oil, pressure oil at the bottom of the hydraulic cylinder 1 flows back to the oil tank 7 through the oil motor 11 through the oil return pipe one 26 under the action of gravity and an external load, and when the pressure oil flows through the oil motor 11, the pressure oil pushes the rotating shaft one 12 on the oil motor 11 to rotate, so that the rotating shaft two 16 on the motor 15 is driven to synchronously rotate, at the moment, the motor 15 serves as a generator to start generating electricity (the generated current can be converted into electric energy of three phases 380V and 50HZ through the treatment of the frequency converter 20, the AFE19 (active front end) and the LCL circuit 22 (feed filter loop), the electric energy is conveyed back to the three-phase power grid 21), and the separation oil cylinder 13 on the right side automatically resets after the falling is finished.
Claims (10)
1. A separable double-acting energy feedback system of a hydraulic cylinder is characterized by comprising an oil tank (7), the hydraulic cylinder (1), an oil motor (11), an oil pump (18) and a motor (15), wherein the top of the hydraulic cylinder (1) and the bottom of the hydraulic cylinder (1) are respectively provided with a first pipeline connector (2) and a second pipeline connector (3), the oil tank (7) and the first pipeline connector (2) are communicated through a first oil supply pipe (28), the second pipeline connector (3) and the oil motor (11), the oil motor (11) and the oil tank (7) are sequentially communicated through a first oil return pipe (26), the oil tank (7) and the oil pump (18), the oil pump (18) and the second pipeline connector (3) are sequentially communicated through a second oil supply pipe (25), and the first pipeline connector (2) and the oil tank (7) are also communicated through a second oil return pipe (23), be equipped with pivot one (12), pivot two (16), pivot three (17) on oil motor (11), motor (15), oil pump (18) respectively, the left and right sides face of motor (15) is link up respectively at the both ends of pivot two (16), all be connected through detachable shaft coupling subassembly between the left end of pivot two (16) and pivot one (12), between the right-hand member of pivot two (16) and pivot three (17).
2. The separable double-acting energy feedback system of the hydraulic cylinder according to claim 1, further comprising a bottom plate (8), wherein a motor base (14) is fixed on the bottom plate (8), the motor (15) is fixed on the upper end surface of the motor base (14), a bottom plate sliding groove (9) is formed in the bottom plate (8), the bottom plate sliding grooves (9) are respectively arranged on the left side and the right side of the motor base (14), sliding seats (10) are slidably connected onto the bottom plate sliding groove (9), the oil pump (18) and the oil motor (11) are respectively fixed onto the two sliding seats (10), the separation cylinders (13) are respectively fixed on the left side and the right side of the motor base (14), and the two sliding seats (10) are respectively fixedly connected with piston rods of the two separation cylinders (13).
3. The separable double-acting energy feedback system of the hydraulic cylinder according to claim 1, wherein the separable coupling component comprises rotating shaft sliding grooves (29) arranged on left and right end faces of a rotating shaft II (16), the rotating shaft sliding grooves (29) on the left end face of the rotating shaft II (16) are matched with a rotating shaft I (12), the rotating shaft sliding grooves (29) on the right end face of the rotating shaft II (16) are matched with a rotating shaft III (17), a plurality of side sliding grooves (31) are uniformly distributed on the inner side wall of the rotating shaft sliding grooves (29) in an annular mode, clamping pins (33) are installed in the side sliding grooves (31), and clamping grooves (35) matched with the clamping pins (33) are formed in the side wall of the rotating shaft I (12) and the side wall of the rotating shaft III (17).
4. The separable double-acting energy feedback system of the hydraulic cylinder according to claim 3, wherein the bayonet lock (33) is shaped as a cuboid, a spring (32) is further arranged in the side sliding groove (31), one end of the spring (32) is connected with the bottom surface of the side sliding groove (31), the other end of the spring (32) is connected with one end of the bayonet lock (33), the other end of the bayonet lock (33) is located close to one side of the bottom surface of the rotating shaft sliding groove (29) and the other end of the bayonet lock (33) and is located far away from one side of the bottom surface of the rotating shaft sliding groove (29) and is provided with a round corner (34), and the shape of the bayonet lock (35) is matched with the shape of the other end of the bayonet lock (33).
5. The separable double-acting energy feedback system of the hydraulic cylinder as claimed in claim 4, wherein a side cavity (45) matched with the side sliding groove (31) is arranged in the second rotating shaft (16), the side cavity (45) is arranged on the side surface of the side sliding groove (31), all the side sliding grooves (31) and all the side cavities (45) are located in the same plane, a through groove (39) and a through hole (43) are arranged between the side sliding groove (31) and the side cavity (45), a top block (37) is arranged in the side sliding groove (31), one surface of the top block (37) is fixedly connected with the other end of the spring (32), a first guide inclined surface (38) and a second guide inclined surface (36) which are matched with each other are respectively arranged between the other surface of the top block (37) and the end surface of one end of the clamping pin (33), and a first compression bar (40) matched with the through groove (39) is fixed on the top block (37), the first pressure lever (40) penetrates through the through groove (39) and is arranged in the side cavity (45) and is connected with the through groove (39) in a sliding manner, a second pressure lever (44) matched with the through hole (43) is arranged on the bayonet lock (33), an axial sliding groove (46) matched with one end of the second pressure lever (44) is arranged on the side wall of the bayonet lock (33), one end of the second pressure lever (44) is arranged on the axial sliding groove (46) and is connected with the axial sliding groove in a sliding way, the other end of the second pressure lever (44) penetrates through the through hole (43) to be arranged in the side cavity (45) and is in sliding connection with the through hole (43), a torsion spring seat (42) is fixed in the side cavity (45), a swing rod (41) is arranged on the torsion spring seat (42), the first pressure lever (40) and the second pressure lever (44) are both arranged at the same side of the swing rod (41) and are respectively positioned at two ends of the swing rod (41), the first pressure lever (40) and the second pressure lever (44) are both in contact with the swing rod (41).
6. The separable double-acting energy feedback system of the hydraulic cylinder according to claim 1, further comprising a first energy feedback valve (27), a second energy feedback valve (24) and a safety valve (4), wherein the first oil supply pipe (28) and the first oil return pipe (26) are installed on the first energy feedback valve (27), the second oil supply pipe (25) and the second oil return pipe (23) are installed on the second energy feedback valve (24), the second oil tank (7) and the second pipeline connector (3) are further communicated through a third oil supply pipe (5), the first pipeline connector (2) and the second oil tank (7) are further communicated through a third oil return pipe (6), and the third oil supply pipe (5) and the third oil return pipe (6) are installed on the safety valve (4).
7. The separable double-acting energy feedback system of the hydraulic cylinder according to claim 1, further comprising a frequency converter (20), an LCL circuit (22), a three-phase power grid (21) and an AFE (19), wherein the motor (15) is provided with a wire connector, the frequency converter (20), the LCL circuit (22) and the three-phase power grid (21) are sequentially connected in series, and the frequency converter (20) and the AFE (19) are connected in parallel.
8. A detachable hydraulic cylinder double action energy feedback system according to claim 1, characterized in that the electric motor (15) is of the type of a permanent magnet synchronous motor.
9. A separable double-acting energy feedback method for a hydraulic cylinder is characterized by comprising the following steps:
step one, when the hydraulic cylinder (1) needs to move upwards, a rotating shaft II (16) on a motor (15) is controlled to be connected with a rotating shaft III (17) on an oil pump (18) and separated from a rotating shaft I (12) on an oil motor (11), then pressure oil is pumped into the hydraulic cylinder (1) from an oil tank (7) through an oil supply pipe II (25) through the oil pump (18), and when the rotating shaft III (17) on the oil pump (18) rotates, the rotating shaft II (16) on the motor (15) is driven to synchronously rotate, so that the motor (15) works as a motor;
and step two, when the hydraulic cylinder (1) needs to fall down, controlling a second rotating shaft (16) on the motor (15) to be connected with a first rotating shaft (12) on the oil motor (11) and separated from a third rotating shaft (17) on the oil pump (18), when pressure oil in the hydraulic cylinder (1) falls back to the oil tank (7) through the oil motor (11) under the action of gravity and external load, pushing the first rotating shaft (12) on the oil motor (11) to rotate, further driving the second rotating shaft (16) on the motor (15) to synchronously rotate, and then starting power generation by taking the motor (15) as a generator.
10. The separable double-acting energy feedback method for the hydraulic cylinder according to claim 9, wherein in the second step, the current generated by the motor (15) is converted into three-phase 380V and 50HZ electric energy through the processing of the frequency converter (20), the AFE (19) and the LCL circuit (22) and is transmitted back to the three-phase power grid (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317610.0A CN114233699B (en) | 2021-11-09 | 2021-11-09 | Separable hydraulic cylinder double-acting energy feedback system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317610.0A CN114233699B (en) | 2021-11-09 | 2021-11-09 | Separable hydraulic cylinder double-acting energy feedback system and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233699A true CN114233699A (en) | 2022-03-25 |
| CN114233699B CN114233699B (en) | 2023-12-26 |
Family
ID=80748694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111317610.0A Active CN114233699B (en) | 2021-11-09 | 2021-11-09 | Separable hydraulic cylinder double-acting energy feedback system and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233699B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570346A (en) * | 2004-05-09 | 2005-01-26 | 浙江大学 | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology |
| CN1683797A (en) * | 2005-03-15 | 2005-10-19 | 浙江大学 | Double pump-motor hydraulic driving system for lifting oil cylinder of engineering machine |
| CN103671306A (en) * | 2013-11-21 | 2014-03-26 | 中国石油化工股份有限公司 | Hydraulic power device and potential energy converting and operating methods thereof |
| CN108194437A (en) * | 2018-02-28 | 2018-06-22 | 福建工程学院 | A kind of potential energy recycling and the pump hydraulic energy conserving system of electric machine speed regulation |
| CN108591144A (en) * | 2018-07-02 | 2018-09-28 | 福建工程学院 | The distributed direct of the double accumulators of the double constant displacement pumps of motor driving drives excavator hydraulic system |
| CN211816932U (en) * | 2020-01-13 | 2020-10-30 | 济宁一建钢结构工程有限公司 | Detachable assembly type building steel structure |
-
2021
- 2021-11-09 CN CN202111317610.0A patent/CN114233699B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570346A (en) * | 2004-05-09 | 2005-01-26 | 浙江大学 | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology |
| CN1683797A (en) * | 2005-03-15 | 2005-10-19 | 浙江大学 | Double pump-motor hydraulic driving system for lifting oil cylinder of engineering machine |
| CN103671306A (en) * | 2013-11-21 | 2014-03-26 | 中国石油化工股份有限公司 | Hydraulic power device and potential energy converting and operating methods thereof |
| CN108194437A (en) * | 2018-02-28 | 2018-06-22 | 福建工程学院 | A kind of potential energy recycling and the pump hydraulic energy conserving system of electric machine speed regulation |
| CN108591144A (en) * | 2018-07-02 | 2018-09-28 | 福建工程学院 | The distributed direct of the double accumulators of the double constant displacement pumps of motor driving drives excavator hydraulic system |
| CN211816932U (en) * | 2020-01-13 | 2020-10-30 | 济宁一建钢结构工程有限公司 | Detachable assembly type building steel structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114233699B (en) | 2023-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211449002U (en) | High-stability isolated electric water pump | |
| CN216518908U (en) | Separable double-acting energy feedback structure of hydraulic cylinder | |
| CN114233699A (en) | Separable hydraulic cylinder double-acting energy feedback system and method thereof | |
| US3994134A (en) | Apparatus for power generation in deep seawater | |
| CN216589339U (en) | Two-way hydraulic cylinder double-acting energy feedback structure | |
| CN203906417U (en) | Air-driven and liquid-operated power system on corner combining machine | |
| CN110735819A (en) | fluid pressurization method | |
| CN202290268U (en) | Driving device for pulsation water flow of jigger | |
| CN103967449A (en) | Operational control system and corresponding control method of hydraulic pumping unit | |
| CN203130452U (en) | Intelligent linear motor oil extraction system | |
| CN103062023A (en) | Intelligent linear-motor oil production system | |
| CN2692916Y (en) | Full-digital CD motor speed-regulating control cabinet | |
| CN209483308U (en) | A kind of Worm Wheel System pumping unit | |
| CN202499449U (en) | Garbage can capable of automatically compressing garbage | |
| CN101524870B (en) | Spiral groove type hydraulic vibration commutator | |
| CN201568250U (en) | Novel emulsion pump station for coal mine | |
| CN114321037B (en) | Bidirectional hydraulic cylinder double-acting energy feedback system and method thereof | |
| CN212034012U (en) | Brushless motor drive controller | |
| CN2225319Y (en) | Mechanic-hydraulic press | |
| CN114055157B (en) | Processing machine table for mounting pipe plug of furniture part | |
| CN212744597U (en) | Oil return device of hydraulic tool | |
| CN213953910U (en) | Medical grade screw glue injection pump | |
| CN216503912U (en) | Automobile water pump terminal surface production grinding device | |
| CN220172961U (en) | Novel energy-saving motor | |
| CN201080811Y (en) | Beam type energy-saving oil pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 29 Xiacheng Road, Tonglu County, Hangzhou City, Zhejiang Province, 311599 Patentee after: Hangzhou Baoxie Electromechanical Technology Co.,Ltd. Country or region after: China Address before: 311500 No. 29, Xiacheng Road, Tonglu County, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Baoxie Electromechanical Technology Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |