CN113148914A - Forklift potential energy recovery and release integrated device and working method - Google Patents
Forklift potential energy recovery and release integrated device and working method Download PDFInfo
- Publication number
- CN113148914A CN113148914A CN202110127810.3A CN202110127810A CN113148914A CN 113148914 A CN113148914 A CN 113148914A CN 202110127810 A CN202110127810 A CN 202110127810A CN 113148914 A CN113148914 A CN 113148914A
- Authority
- CN
- China
- Prior art keywords
- valve
- way electromagnetic
- oil cylinder
- hydraulic pump
- motor
- 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
- 238000011084 recovery Methods 0.000 title claims abstract description 43
- 238000005381 potential energy Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 90
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- 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
Abstract
The invention discloses a device for integrating potential energy recovery and release of a forklift and a working method, wherein the device integrates the recovery and release of gravitational potential energy, and realizes the recovery and release of energy through the same set of energy recovery and release unit: when the lifting oil cylinder drives the heavy object to be lowered, the hydraulic pump motor is used as a motor, the motor generator is used as a generator, pressure oil in the second rodless cavity of the lifting oil cylinder flows into the motor to drive the generator to work, and output electric energy is stored in the storage battery; or the pressure oil of the second rodless cavity of the lifting oil cylinder flows into the first rodless cavity of the tilting oil cylinder to drive the tilting oil cylinder to act, and the energy recovery is completed. In the lifting process, the motor generator works in a motor state to draw electric energy from the storage battery, the hydraulic pump motor works in a hydraulic pump state to improve pressure oil for the system, a piston rod of the lifting oil cylinder or a piston rod of the inclined oil cylinder is pushed to extend out to complete the lifting action, and the energy releasing process is carried out at the moment.
Description
Technical Field
The invention relates to a device for integrating potential energy recovery and release of a forklift and a working method.
Background
The forklift is a common lifting tool, is generally driven by an engine or a motor, and has the working principle that the engine or the motor drives a hydraulic pump to generate hydraulic energy, so that a lifting oil cylinder converts the hydraulic energy into gravitational potential energy of goods.
The electric forklift takes a battery as energy, and an electric motor replaces an engine to drive a hydraulic system to work so as to finish the working processes of lifting, descending, transferring, unloading and the like of goods. Because the forklift contains a large amount of potential energy in the process of driving the heavy object to descend, the traditional forklift consumes the part of energy on the throttle valve port, on one hand, a large amount of energy loss is caused, on the other hand, the temperature of the oil liquid is also increased, the service lives of hydraulic elements and the oil liquid are influenced, and the problems of leakage, unstable work and the like are possibly caused. At present, aiming at the research of the potential energy of the forklift, a hydraulic energy accumulator is used for storing pressure oil of a lifting oil cylinder in the process of lowering a heavy object, but the pressure of the energy accumulator is gradually increased along with the increase of the recovered pressure oil, so that the controllability of the heavy object is changed in the process of lowering the heavy object; the other part of research adopts an electric energy recovery mode, and adopts a set of independent hydraulic motor-generator to be connected with a rodless cavity of the lifting oil cylinder; when the lifting oil cylinder drives the heavy object to descend, hydraulic oil in the rodless cavity of the lifting oil cylinder flows into the hydraulic motor to drive the generator to generate electricity, and electric energy is stored in the battery. During lifting or other conditions, the stored electrical energy is released. The energy recovery system and the energy release system of the working method are two different systems, and have the defects of multiple energy conversion, complex system and low efficiency. To simplify the system and improve the energy utilization efficiency, the integration of recovery and release is an important direction of research.
Disclosure of Invention
The invention provides a device for integrating potential energy recovery and release of a forklift and a working method, which overcome the defects in the background technology. One of the technical schemes adopted by the invention for solving the technical problems is as follows:
fork truck potential energy is retrieved and is released integrated device, it includes: the device comprises a tilting oil cylinder, a lifting oil cylinder, a three-position four-way electromagnetic directional valve, a first two-position two-way electromagnetic directional valve, a second two-position two-way electromagnetic directional valve, an energy recovery and release unit, a motor controller and a storage battery, wherein the tilting oil cylinder comprises a first rod cavity and a first rodless cavity; the lifting oil cylinder comprises a second rod cavity and a second rodless cavity, the second rodless cavity is connected with a first two-position two-way electromagnetic directional valve, the first two-position two-way electromagnetic directional valve is connected with the second two-position two-way electromagnetic directional valve and the energy recovery and release unit, and the second two-position two-way electromagnetic directional valve is connected with the energy recovery and release unit.
In a preferred embodiment: the energy recovery and release unit comprises a hydraulic pump motor, a motor generator and a first oil tank, the hydraulic pump motor is connected with the motor generator, the three-position four-way electromagnetic directional valve and the first oil tank, and the motor generator is connected with the motor controller.
In a preferred embodiment: the hydraulic pump motor is arranged coaxially with the motor generator.
In a preferred embodiment: the device also comprises a first one-way valve and a second one-way valve, wherein the inlet of the first one-way valve is connected with the hydraulic pump motor and the outlet of the second one-way valve, and the outlet of the first one-way valve is connected with the three-position four-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve; and the inlet of the second one-way valve is connected with both the first two-position two-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve, and the outlet of the second one-way valve is connected with the hydraulic pump motor.
In a preferred embodiment: the device also comprises a throttle valve which is connected between the first two-position two-way electromagnetic directional valve and the inlet of the second one-way valve.
In a preferred embodiment: the device also comprises an overflow valve and a second oil tank, wherein the inlet of the overflow valve is connected with the hydraulic pump motor, the inlet of the first one-way valve and the outlet of the second one-way valve, and the outlet of the overflow valve is connected with the second oil tank.
In a preferred embodiment: the device still includes oil supplementing check valve and third oil tank, and this oil supplementing check valve import links to each other with the third oil tank, and this oil supplementing check valve export all links to each other with overflow valve import, hydraulic pump motor, first check valve import.
In a preferred embodiment: the two lifting oil cylinders are arranged, and second rodless cavities of the two lifting oil cylinders are connected with the first two-position two-way electromagnetic directional valve.
The second technical scheme adopted by the invention for solving the technical problems is as follows:
the integrated working method for recovering and releasing the potential energy of the forklift, which applies the integrated device for recovering and releasing the potential energy of the forklift, comprises the following steps:
the fork truck has two states when potential energy is retrieved:
when the lifting oil cylinder is driven to drive a heavy object to be lowered, the three-position four-way electromagnetic reversing valve is located at the middle position, the inclined oil cylinder does not work, at the moment, the first two-position two-way electromagnetic reversing valve is electrified, the second two-position two-way electromagnetic reversing valve is not electrified, pressure oil in a second rodless cavity of the lifting oil cylinder flows into the hydraulic pump motor after passing through the first two-position two-way electromagnetic reversing valve, the throttle valve and the second one-way valve, the hydraulic pump motor 11 serves as a motor, the motor generator is in a power generation state, and electric energy is stored in the storage battery through the motor controller; due to the existence of the hydraulic pump motor, the pressure difference between two ends of the throttle valve can be adjusted, so that the accurate control of the descending speed is realized;
alternatively, the first and second electrodes may be,
when the lifting oil cylinder is driven to drive the heavy object to be lowered, the left position or the right position of the three-position four-way electromagnetic directional valve works, the inclined oil cylinder is in a working state, the working pressure of the inclined oil cylinder is lower than the pressure of a second rodless cavity of the lifting oil cylinder, the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are electrified at the moment, and pressure oil in the second rodless cavity of the lifting oil cylinder flows into the first rodless cavity of the inclined oil cylinder after passing through the left positions or the right positions of the first two-position two-way electromagnetic directional valve, the second two-position two-way electromagnetic directional valve and the three-position four-way electromagnetic directional valve, so that the inclined oil cylinder drives the heavy object to be tilted forwards and backwards;
the energy release has two states:
when the lifting oil cylinder is driven to drive the fork to lift, the first two-position two-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve are electrified, energy stored in the storage battery is supplied to the motor generator to enable the motor generator to be in a motor state, the hydraulic pump motor is used as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, the pressure oil enters the second rodless cavity of the lifting oil cylinder through the first one-way valve, the second two-position two-way electromagnetic reversing valve and the first two-position two-way electromagnetic reversing valve to push the lifting oil cylinder to drive the fork to complete lifting action, and recycling of recovered energy is achieved;
alternatively, the first and second electrodes may be,
when the driving tilting oil cylinder works and the lifting oil cylinder does not work, the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are not electrified, the three-position four-way electromagnetic directional valve is electrified and works in the left position or the right position, at the moment, energy stored in the storage battery is supplied to the motor generator to enable the motor generator to be in a motor state, the hydraulic pump motor serves as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, and the pressure oil output by the hydraulic pump flows into a first rodless cavity of the tilting oil cylinder after passing through the first one-way valve and the three-position four-way electromagnetic directional valve to enable the fork to be driven to incline forwards or backwards, so that the recycling of the energy is realized.
Compared with the background technology, the technical scheme has the following advantages:
1. the device integrates the recovery and the release of gravitational potential energy, and realizes the recovery and the release of energy through the same set of energy recovery and release unit: in the process that the lifting oil cylinder drives the heavy object to be lowered, the hydraulic pump motor is used as a motor, the motor generator is used as a generator, pressure oil in the second rodless cavity of the lifting oil cylinder flows into the motor to push the motor to drive the generator to work, and output electric energy is stored in the storage battery to finish energy recovery. In the lifting process, the motor generator works in a motor state to draw electric energy from the storage battery, the hydraulic pump motor works in a hydraulic pump state to improve pressure oil for the system, a piston rod of the lifting oil cylinder is pushed to extend out to complete the lifting action, and the energy releasing process is performed at the moment.
2. On the aspect of energy release, on one hand, the energy can be released through the energy recovery and release unit, and the lifting oil cylinder is continuously pushed to work; on the other hand, when the working pressure of the tilting oil cylinder is lower than the pressure of the second rodless cavity of the lifting oil cylinder, the pressure oil of the second rodless cavity of the lifting oil cylinder can directly flow into the tilting oil cylinder to push the tilting oil cylinder to complete related operations, and at the moment, the pressure oil and the pressure oil are directly utilized, so that energy conversion does not exist, and the efficiency is higher.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a block diagram showing the overall structure of a potential energy recovery and release integrated device of a forklift in a preferred embodiment.
Detailed Description
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" and "fixedly connected" should be interpreted broadly, that is, any connection between the two that is not in a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.
In the claims, the specification and the drawings of the present invention, the terms "including", "having", and variations thereof, are intended to be inclusive and not limiting.
Referring to fig. 1, a preferred embodiment of a device for integrating potential energy recovery and release of a forklift includes a tilting cylinder 1, lifting cylinders 2.1 and 2.2, a three-position four-way electromagnetic directional valve 3, a first two-position two-way electromagnetic directional valve 4, a second two-position two-way electromagnetic directional valve 5, an energy recovery and release unit 20, a motor controller 13 and a storage battery 14.
The tilting oil cylinder 1 comprises a first rod cavity and a first rodless cavity, the three-position four-way electromagnetic directional valve 3 is connected with the first rod cavity, the first rodless cavity, the second two-position two-way electromagnetic directional valve 5 and the energy recovery and release unit 20, the energy recovery and release unit 20 is connected with the motor controller 13, and the motor controller 13 is connected with the storage battery 14; the lifting oil cylinders 2.1 and 2.2 comprise a second rod cavity and a second rodless cavity, the second rodless cavity is connected with the first two-position two-way electromagnetic directional valve 4, the first two-position two-way electromagnetic directional valve 4 is connected with the second two-position two-way electromagnetic directional valve 5 and the energy recovery and release unit 20, and the second two-position two-way electromagnetic directional valve 5 is connected with the energy recovery and release unit 20.
In this embodiment, two lifting cylinders 2.1 and 2.2 are provided, and the second rodless cavities of the two lifting cylinders 2.1 and 2.2 are connected with the first two-position two-way electromagnetic directional valve 4.
In this embodiment, the energy recovery and release unit 20 includes a hydraulic pump motor 11, a motor generator 12, and a first oil tank 15, the hydraulic pump motor 11 is connected to the motor generator 12, the three-position four-way electromagnetic directional valve 3, and the first oil tank 15, and the motor generator 12 is connected to the motor controller 13. Preferably, the hydraulic pump motor 11 is arranged coaxially with the motor generator 12 to reduce friction and improve efficiency.
In this embodiment, the device further comprises a first check valve 6 and a second check valve 7, wherein an inlet of the first check valve 6 is connected with outlets of the hydraulic pump motor 11 and the second check valve 7, and outlets of the first check valve 6 are connected with the three-position four-way electromagnetic directional valve 3 and the second two-position two-way electromagnetic directional valve 5; and the inlet of the second one-way valve 7 is connected with the first two-position two-way electromagnetic directional valve 4 and the second two-position two-way electromagnetic directional valve 5, and the outlet of the second one-way valve 7 is connected with the hydraulic pump motor 11.
In the embodiment, the device further comprises a throttle valve 8, and the throttle valve 8 is connected between the inlets of the first two-position two-way electromagnetic directional valve 4 and the second one-way valve 7.
In this embodiment, the device further includes an overflow valve 9 and a second oil tank 17, an inlet of the overflow valve 9 is connected to the hydraulic pump motor 11, an inlet of the first check valve 6 and an outlet of the second check valve 7, and an outlet of the overflow valve 9 is connected to the second oil tank 17.
In this embodiment, the device further includes an oil supplementing check valve 10 and a third oil tank 16, an inlet of the oil supplementing check valve 10 is connected with the third oil tank 16, and an outlet of the oil supplementing check valve 10 is connected with an inlet of the overflow valve 9, an inlet of the hydraulic pump motor 11 and an inlet of the first check valve 6.
The working method of the potential energy recovery and release integrated device for the forklift comprises the following steps:
the fork truck has two states when potential energy is retrieved:
when an operating handle of the forklift drives the lifting oil cylinders 2.1 and 2.2 to drive a heavy object to be lowered, the three-position four-way electromagnetic directional valve 3 is located at a middle position, the inclined oil cylinder 1 does not work, at the moment, the first two-position two-way electromagnetic directional valve 4 is electrified, the second two-position two-way electromagnetic directional valve 5 is not electrified, pressure oil in a second rodless cavity of the lifting oil cylinders 2.1 and 2.2 flows into the hydraulic pump motor 11 after passing through the first two-position two-way electromagnetic directional valve 4, the throttle valve 8 and the second one-way valve 7, the hydraulic pump motor 11 is used as a motor to drive the motor generator 12 to be in a power generation state, and electric energy is stored in the storage battery 14 through the motor controller 13; due to the existence of the hydraulic pump motor 11, the pressure difference between two ends of the throttle valve 8 can be adjusted, so that the accurate control of the descending speed is realized;
alternatively, the first and second electrodes may be,
when the lifting oil cylinders 2.1 and 2.2 are driven to drive a heavy object to be lowered, the left position or the right position of the three-position four-way electromagnetic directional valve 3 works, the inclined oil cylinder 1 is in a working state, the working pressure of the inclined oil cylinder 1 is lower than the pressure of a second rodless cavity of the lifting oil cylinders 2.1 and 2.2, the first two-position two-way electromagnetic directional valve 4 and the second two-position two-way electromagnetic directional valve 5 are electrified, pressure oil in the second rodless cavity of the lifting oil cylinders 2.1 and 2.2 flows into the first rodless cavity of the inclined oil cylinder 1 after passing through the first two-position two-way electromagnetic directional valve 4, the second two-position two-way electromagnetic directional valve 5 and the left position or the right position of the three-position four-way electromagnetic directional valve 3, and the inclined oil cylinder 1 is promoted to drive the heavy object to be tilted forwards and backwards;
the energy release has two states:
when the lifting oil cylinders 2.1 and 2.2 are driven to drive the fork to lift, the first two-position two-way electromagnetic directional valve 4 and the second two-position two-way electromagnetic directional valve 5 are electrified, energy stored in the storage battery 14 is supplied to the motor generator 12 at the moment so as to enable the motor generator to be in a motor state, the hydraulic pump motor 11 is used as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, the pressure oil enters the second rodless cavities of the lifting oil cylinders 2.1 and 2.2 through the first one-way valve 6, the second two-position two-way electromagnetic directional valve 5 and the first two-position two-way electromagnetic directional valve 4, the lifting oil cylinders 2.1 and 2.2 are pushed to drive the fork to complete lifting action, and recycling of recovered energy is achieved;
alternatively, the first and second electrodes may be,
when the driving tilting cylinder 1 works and the lifting cylinder 2 does not work, the first two-position two-way electromagnetic directional valve 4 and the second two-position two-way electromagnetic directional valve 5 are not electrified, the three-position four-way electromagnetic directional valve 3 is electrified and works in the left position or the right position, at the moment, energy stored in the storage battery 14 is supplied to the motor generator 12 to enable the motor generator to be in a motor state, the hydraulic pump motor 11 serves as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, and the pressure oil output by the hydraulic pump flows into a first rodless cavity of the tilting cylinder 1 after passing through the first one-way valve 6 and the three-position four-way electromagnetic directional valve 3 to drive the fork to tilt forwards or backwards, so that the recycling of the energy is realized.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (9)
1. Fork truck potential energy is retrieved and release integrated device, its characterized in that: it includes: the device comprises a tilting oil cylinder, a lifting oil cylinder, a three-position four-way electromagnetic directional valve, a first two-position two-way electromagnetic directional valve, a second two-position two-way electromagnetic directional valve, an energy recovery and release unit, a motor controller and a storage battery, wherein the tilting oil cylinder comprises a first rod cavity and a first rodless cavity; the lifting oil cylinder comprises a second rod cavity and a second rodless cavity, the second rodless cavity is connected with a first two-position two-way electromagnetic directional valve, the first two-position two-way electromagnetic directional valve is connected with the second two-position two-way electromagnetic directional valve and the energy recovery and release unit, and the second two-position two-way electromagnetic directional valve is connected with the energy recovery and release unit.
2. The integrated forklift potential energy recovery and release device of claim 1, wherein: the energy recovery and release unit comprises a hydraulic pump motor, a motor generator and a first oil tank, the hydraulic pump motor is connected with the motor generator, the three-position four-way electromagnetic directional valve and the first oil tank, and the motor generator is connected with the motor controller.
3. The integrated forklift potential energy recovery and release device of claim 2, wherein: the hydraulic pump motor is arranged coaxially with the motor generator.
4. The integrated forklift potential energy recovery and release device of claim 3, wherein: the device also comprises a first one-way valve and a second one-way valve, wherein the inlet of the first one-way valve is connected with the hydraulic pump motor and the outlet of the second one-way valve, and the outlet of the first one-way valve is connected with the three-position four-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve; and the inlet of the second one-way valve is connected with both the first two-position two-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve, and the outlet of the second one-way valve is connected with the hydraulic pump motor.
5. The integrated forklift potential energy recovery and release device of claim 4, wherein: the device also comprises a throttle valve which is connected between the first two-position two-way electromagnetic directional valve and the inlet of the second one-way valve.
6. The integrated forklift potential energy recovery and release device of claim 5, wherein: the device also comprises an overflow valve and a second oil tank, wherein the inlet of the overflow valve is connected with the hydraulic pump motor, the inlet of the first one-way valve and the outlet of the second one-way valve, and the outlet of the overflow valve is connected with the second oil tank.
7. The integrated forklift potential energy recovery and release device of claim 6, wherein: the device still includes oil supplementing check valve and third oil tank, and this oil supplementing check valve import links to each other with the third oil tank, and this oil supplementing check valve export all links to each other with overflow valve import, hydraulic pump motor, first check valve import.
8. The integrated forklift potential energy recovery and release device of claim 7, wherein: the two lifting oil cylinders are arranged, and second rodless cavities of the two lifting oil cylinders are connected with the first two-position two-way electromagnetic directional valve.
9. An integrated forklift potential energy recovery and release working method applying the integrated forklift potential energy recovery and release device of any one of claims 7 to 8, characterized in that: the method comprises the following steps:
the fork truck has two states when potential energy is retrieved:
when the lifting oil cylinder is driven to drive a heavy object to be lowered, the three-position four-way electromagnetic reversing valve is located at the middle position, the inclined oil cylinder does not work, at the moment, the first two-position two-way electromagnetic reversing valve is electrified, the second two-position two-way electromagnetic reversing valve is not electrified, pressure oil in a second rodless cavity of the lifting oil cylinder flows into the hydraulic pump motor after passing through the first two-position two-way electromagnetic reversing valve, the throttle valve and the second one-way valve, the hydraulic pump motor 11 serves as a motor, the motor generator is in a power generation state, and electric energy is stored in the storage battery through the motor controller; due to the existence of the hydraulic pump motor, the pressure difference between two ends of the throttle valve can be adjusted, so that the accurate control of the descending speed is realized;
alternatively, the first and second electrodes may be,
when the lifting oil cylinder is driven to drive the heavy object to be lowered, the left position or the right position of the three-position four-way electromagnetic directional valve works, the inclined oil cylinder is in a working state, the working pressure of the inclined oil cylinder is lower than the pressure of a second rodless cavity of the lifting oil cylinder, the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are electrified at the moment, and pressure oil in the second rodless cavity of the lifting oil cylinder flows into the first rodless cavity of the inclined oil cylinder after passing through the left positions or the right positions of the first two-position two-way electromagnetic directional valve, the second two-position two-way electromagnetic directional valve and the three-position four-way electromagnetic directional valve, so that the inclined oil cylinder drives the heavy object to be tilted forwards and backwards;
the energy release has two states:
when the lifting oil cylinder is driven to drive the fork to lift, the first two-position two-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve are electrified, energy stored in the storage battery is supplied to the motor generator to enable the motor generator to be in a motor state, the hydraulic pump motor is used as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, the pressure oil enters the second rodless cavity of the lifting oil cylinder through the first one-way valve, the second two-position two-way electromagnetic reversing valve and the first two-position two-way electromagnetic reversing valve to push the lifting oil cylinder to drive the fork to complete lifting action, and recycling of recovered energy is achieved;
alternatively, the first and second electrodes may be,
when the driving tilting oil cylinder works and the lifting oil cylinder does not work, the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are not electrified, the three-position four-way electromagnetic directional valve is electrified and works in the left position or the right position, at the moment, energy stored in the storage battery is supplied to the motor generator to enable the motor generator to be in a motor state, the hydraulic pump motor serves as a hydraulic pump, the hydraulic pump outputs pressure oil outwards, and the pressure oil output by the hydraulic pump flows into a first rodless cavity of the tilting oil cylinder after passing through the first one-way valve and the three-position four-way electromagnetic directional valve to enable the fork to be driven to incline forwards or backwards, so that the recycling of the energy is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110127810.3A CN113148914B (en) | 2021-01-29 | 2021-01-29 | Forklift potential energy recovery and release integrated device and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110127810.3A CN113148914B (en) | 2021-01-29 | 2021-01-29 | Forklift potential energy recovery and release integrated device and working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113148914A true CN113148914A (en) | 2021-07-23 |
| CN113148914B CN113148914B (en) | 2023-12-29 |
Family
ID=76879114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110127810.3A Active CN113148914B (en) | 2021-01-29 | 2021-01-29 | Forklift potential energy recovery and release integrated device and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113148914B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114715818A (en) * | 2022-04-26 | 2022-07-08 | 华侨大学 | Potential energy recovery system of split type electro-hydraulic drive forklift and split type electro-hydraulic drive forklift |
| CN114835059A (en) * | 2022-04-27 | 2022-08-02 | 广东海洋大学 | Simulation optimization system of engineering forklift |
| CN114940467A (en) * | 2022-05-24 | 2022-08-26 | 华侨大学 | Electro-hydraulic compound forklift and driving system, method and device thereof, and storage medium |
| CN117645254B (en) * | 2024-01-30 | 2024-04-26 | 杭叉集团股份有限公司 | Forklift forward energy recovery hydraulic control system and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830750A (en) * | 2006-03-31 | 2006-09-13 | 西安交通大学 | Electric fork track lifting control system possessing energy recovery device |
| CN202609873U (en) * | 2012-03-23 | 2012-12-19 | 三一集团有限公司 | Oil-electricity hybrid motive power stacking machine |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
| CN107420384A (en) * | 2017-09-15 | 2017-12-01 | 太原理工大学 | Lifting device gravitional force P-V storage system |
| US20180023271A1 (en) * | 2014-09-17 | 2018-01-25 | Taiyuan University Of Technology | Variable-speed volume-control direct-drive all-electric hydraulic excavator driving and energy recovery system |
| CN108180188A (en) * | 2018-01-04 | 2018-06-19 | 徐州工业职业技术学院 | A kind of engineering machinery movable arm potential energy recycle and reuse electrohydraulic control system |
| CN214570507U (en) * | 2021-01-29 | 2021-11-02 | 华侨大学 | Device integrating potential energy recovery and release of forklift |
| CN114715818A (en) * | 2022-04-26 | 2022-07-08 | 华侨大学 | Potential energy recovery system of split type electro-hydraulic drive forklift and split type electro-hydraulic drive forklift |
-
2021
- 2021-01-29 CN CN202110127810.3A patent/CN113148914B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830750A (en) * | 2006-03-31 | 2006-09-13 | 西安交通大学 | Electric fork track lifting control system possessing energy recovery device |
| CN202609873U (en) * | 2012-03-23 | 2012-12-19 | 三一集团有限公司 | Oil-electricity hybrid motive power stacking machine |
| US20180023271A1 (en) * | 2014-09-17 | 2018-01-25 | Taiyuan University Of Technology | Variable-speed volume-control direct-drive all-electric hydraulic excavator driving and energy recovery system |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
| CN107420384A (en) * | 2017-09-15 | 2017-12-01 | 太原理工大学 | Lifting device gravitional force P-V storage system |
| CN108180188A (en) * | 2018-01-04 | 2018-06-19 | 徐州工业职业技术学院 | A kind of engineering machinery movable arm potential energy recycle and reuse electrohydraulic control system |
| CN214570507U (en) * | 2021-01-29 | 2021-11-02 | 华侨大学 | Device integrating potential energy recovery and release of forklift |
| CN114715818A (en) * | 2022-04-26 | 2022-07-08 | 华侨大学 | Potential energy recovery system of split type electro-hydraulic drive forklift and split type electro-hydraulic drive forklift |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114715818A (en) * | 2022-04-26 | 2022-07-08 | 华侨大学 | Potential energy recovery system of split type electro-hydraulic drive forklift and split type electro-hydraulic drive forklift |
| CN114835059A (en) * | 2022-04-27 | 2022-08-02 | 广东海洋大学 | Simulation optimization system of engineering forklift |
| CN114940467A (en) * | 2022-05-24 | 2022-08-26 | 华侨大学 | Electro-hydraulic compound forklift and driving system, method and device thereof, and storage medium |
| CN114940467B (en) * | 2022-05-24 | 2023-11-03 | 华侨大学 | Electro-hydraulic composite forklift and driving system, method and device thereof as well as storage medium |
| CN117645254B (en) * | 2024-01-30 | 2024-04-26 | 杭叉集团股份有限公司 | Forklift forward energy recovery hydraulic control system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113148914B (en) | 2023-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113148914A (en) | Forklift potential energy recovery and release integrated device and working method | |
| CN102633213B (en) | Energy regeneration type forklift hydraulic system | |
| CN107420384B (en) | System is used in the storage of lifting device gravitional force P-V | |
| CN102134047B (en) | Energy-saving hydraulic system of electric forklift | |
| CN214570507U (en) | Device integrating potential energy recovery and release of forklift | |
| CN108755794B (en) | Hydraulic excavator based on hydraulic-electric composite drive | |
| CN102587444A (en) | Oil hybrid system for excavator with energy differential recovery | |
| CN103950870B (en) | A kind of forklift hydraulic system of double pump fuel feeding band energy regenerating | |
| CN102616705B (en) | Energy-saving forklift hydraulic system with energy recovery function | |
| CN110700337B (en) | Energy-saving control system and control method for movable arm of excavator | |
| CN102134048A (en) | Hydraulic system of hybrid power forklift | |
| CN108978774B (en) | Series-parallel hybrid power system for excavator | |
| CN112249986A (en) | Energy recovery system based on multi-hydraulic motor-accumulator combined electric forklift | |
| CN107700576A (en) | Hydraulic crawler excavator action potential recycling system | |
| CN208454429U (en) | Bypass type energy regeneration forklift hydraulic system | |
| CN102628465A (en) | Energy recovery type lifting hydraulic system for hoisting and conveying machine | |
| CN114715818B (en) | Separate type electro-hydraulic driven forklift potential energy recovery system and separate type electro-hydraulic driven forklift | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system | |
| CN202542790U (en) | Energy-saving forklift hydraulic system with energy recycling | |
| CN201962039U (en) | Energy-saving hydraulic system of electronic forklift | |
| CN201962038U (en) | Hydraulic system for hybrid power forklift | |
| CN213679680U (en) | Energy recovery system based on multi-hydraulic motor-accumulator combined electric forklift | |
| CN211312642U (en) | Excavator movable arm energy-saving control system | |
| CN210978074U (en) | Energy recycling device | |
| CN202575895U (en) | Energy regeneration type hydraulic system for forklift |
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 |