CN214570507U - Device integrating potential energy recovery and release of forklift - Google Patents
Device integrating potential energy recovery and release of forklift Download PDFInfo
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- CN214570507U CN214570507U CN202120270047.5U CN202120270047U CN214570507U CN 214570507 U CN214570507 U CN 214570507U CN 202120270047 U CN202120270047 U CN 202120270047U CN 214570507 U CN214570507 U CN 214570507U
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Abstract
The utility model discloses a device of fork truck potential energy recovery and release integration, the device with the recovery and the release integration of gravitational potential energy, through same set of energy recuperation and release unit realization energy recovery and release: 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 utility model relates to a device of fork truck potential energy recovery and release integration.
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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device of fork truck potential energy recovery and release integration, it has overcome the not enough that the background art exists. The utility model provides a technical scheme that its technical problem adopted is:
a forklift potential energy recovery and release integrated device comprises: 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.
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, and energy conversion does not exist, so that the effect is high.
Drawings
The present invention will be further explained with reference to the drawings 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, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.
In the claims, the specification and the drawings, unless otherwise expressly limited, to the extent that directional terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" and the like are used, the positional or orientational relationships illustrated in the drawings are based on the positional and orientational relationships illustrated in the drawings and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element so referred to 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 any way.
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 understood in a broad sense, i.e., any connection without displacement relationship or relative rotation relationship between the two, i.e., including non-detachable fixed connection, integrated connection and fixed connection by other devices or elements.
In the claims, the specification and drawings of the present invention, the terms "including", "having" and their variants, if used, 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 the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a device that fork truck potential energy was retrieved and was released integration which 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 device for recovering and releasing potential energy of the forklift as recited in 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 device for recovering and releasing potential energy of the forklift as recited in claim 2, wherein: the hydraulic pump motor is arranged coaxially with the motor generator.
4. The integrated device for recovering and releasing potential energy of the forklift as recited in 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 device for recovering and releasing potential energy of the forklift as recited in 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 device for recovering and releasing potential energy of the forklift as recited in 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 device for recovering and releasing potential energy of the forklift as recited in 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 device for recovering and releasing potential energy of the forklift as recited in 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.
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| CN202120270047.5U CN214570507U (en) | 2021-01-29 | 2021-01-29 | Device integrating potential energy recovery and release of forklift |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148914A (en) * | 2021-01-29 | 2021-07-23 | 华侨大学 | Forklift potential energy recovery and release integrated device and working method |
| 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 |
-
2021
- 2021-01-29 CN CN202120270047.5U patent/CN214570507U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148914A (en) * | 2021-01-29 | 2021-07-23 | 华侨大学 | Forklift potential energy recovery and release integrated device and working method |
| CN113148914B (en) * | 2021-01-29 | 2023-12-29 | 华侨大学 | Forklift potential energy recovery and release integrated device and working method |
| 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 |
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Effective date of registration: 20220817 Address after: Xizhuang Village, Dongyuan Town, Quanzhou Taiwanese Investment Zone, Quanzhou City, Fujian Province, 362000 Patentee after: FUJIAN SOUTHCHINA MACHINERY MANUFACTURE CO.,LTD. Address before: 362000 North China Road, Dongcheng, Fengze District, Quanzhou City, Fujian Province, 269 Patentee before: HUAQIAO University |