CN218377110U - Hydraulic system for recovering potential energy and engineering machinery - Google Patents
Hydraulic system for recovering potential energy and engineering machinery Download PDFInfo
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- CN218377110U CN218377110U CN202222396046.2U CN202222396046U CN218377110U CN 218377110 U CN218377110 U CN 218377110U CN 202222396046 U CN202222396046 U CN 202222396046U CN 218377110 U CN218377110 U CN 218377110U
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Abstract
The utility model relates to an engineering machine tool technical field, concretely relates to hydraulic system and engineering machine tool of retrieving potential energy. A potential energy recuperation hydraulic system comprising: a drive motor having a first output shaft; the oil pump is connected with the first output shaft; the oil cylinder is provided with a rodless cavity and a rod cavity; the first reversing valve is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port; the hydraulic actuating element is communicated with the oil return port; and the transmission mechanism is connected with the first output shaft and the hydraulic actuating element. The utility model discloses connect hydraulic actuator at the oil return opening of first switching-over valve, hydraulic oil flows into hydraulic actuator through the oil return opening of first switching-over valve, and hydraulic actuator passes through drive mechanism and drives first output shaft rotatory, provides positive load for driving motor, has realized potential energy recycle, and the potential energy recovery process of having effectively solved among the prior art electric excavator's moving part is loaded down with trivial details and retrieve the problem that the structure is complicated for it is more simple direct to retrieve the mode.
Description
Technical Field
The utility model relates to an engineering machine tool technical field, concretely relates to hydraulic system and engineering machine tool of retrieving potential energy.
Background
A pure electric excavator in an electric excavator is mainly provided with energy supplied by a power battery, construction cost is reduced, waste discharge can be reduced, moving parts such as a movable arm and an arm on the electric excavator move under the control of a hydraulic system, a motor arranged on the electric excavator drives a main pump, hydraulic oil flow direction in a hydraulic circuit is controlled, the electric excavator works frequently when working, the moving parts can release a large amount of potential energy when descending, and in order to improve energy utilization rate, the potential energy released in the descending process of the moving parts can be recycled.
At present, potential energy recycling of an electric excavator is generally completed through a hydraulic loop when a moving part descends, hydraulic oil is pushed through the descending of the moving part and drives a generator to generate electricity, the potential energy of the moving part is converted into electric energy to be stored, however, a large number of structures are additionally arranged in the process of converting the potential energy into the electric energy to complete energy conversion, and the problems of complicated recycling process and complicated recycling structure exist in the subsequent working process.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the loaded down with trivial details and complicated defect of recovery structure of potential energy recovery process of electric excavator's moving part among the prior art to a hydraulic system and engineering machine tool of retrieving potential energy are provided.
In order to solve the above problem, the utility model provides a retrieve hydraulic system of potential energy, include: a drive motor having a first output shaft; the oil pump is connected with the first output shaft; the oil cylinder is provided with a rodless cavity and a rod cavity; the first reversing valve is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port, the oil inlet is communicated with an oil outlet of the oil pump, the first working oil port is communicated with the rodless cavity, and the second working oil port is communicated with the rod cavity; the hydraulic actuating element is communicated with the oil return port; and the transmission mechanism is connected with the first output shaft and the hydraulic actuating element, and the hydraulic actuating element drives the first output shaft to act through the transmission mechanism.
Optionally, the transmission mechanism includes a driving gear and a driven gear that are engaged with each other, the driving gear is connected to the hydraulic actuator, and the driven gear is sleeved on the first output shaft and rotates together with the first output shaft.
Optionally, the transmission mechanism further comprises a clutch, and the driving gear is connected with the hydraulic actuator through the clutch.
Optionally, the hydraulic actuator is a hydraulic motor, the hydraulic motor is provided with a second output shaft, the second output shaft is connected with the transmission mechanism, an oil inlet and an oil return port of the hydraulic motor are connected, the hydraulic system further comprises a hydraulic oil tank, and an oil outlet and an oil return port of the hydraulic motor are respectively communicated with the hydraulic oil tank.
Optionally, the hydraulic system further includes a check valve for making the oil return port conduct to the hydraulic oil tank in one direction, and the check valve is connected in parallel with the hydraulic motor.
Optionally, the hydraulic system further includes a second direction valve, the second direction valve is disposed between the oil return port and the hydraulic actuator, and the second direction valve has an open state for communicating the oil return port with the hydraulic actuator and a closed state for blocking the oil return port from the hydraulic actuator.
Optionally, the second reversing valve is an electromagnetic reversing valve, and the hydraulic system further includes a controller electrically connected to the electromagnetic reversing valve and the driving motor.
Optionally, the cylinder includes at least one of a boom cylinder and an arm cylinder.
Optionally, the number of the oil pumps is at least one, and/or the number of the oil cylinders is at least one.
The utility model also provides an engineering machine tool, it includes: the hydraulic system described above.
The utility model has the advantages of it is following:
1. the hydraulic actuating element is connected to an oil return port of the first reversing valve, the driving motor drives the oil pump to input hydraulic oil into a rod cavity or a rodless cavity in the oil cylinder, the hydraulic oil flowing out of the rodless cavity or the rod cavity of the oil cylinder flows into the hydraulic actuating element through an oil return port of the first reversing valve, the hydraulic actuating element can be driven to move, the hydraulic actuating element drives the first output shaft to rotate through the transmission mechanism, a positive load is provided for the driving motor, electric energy required by the driving motor for driving the oil pump is reduced, electric energy consumption of the motor is reduced, an energy-saving effect is achieved, potential energy recycling is achieved, the problems that the potential energy recycling process of moving parts of the electric excavator in the prior art is complicated and the recycling structure is complex are effectively solved, and the recycling mode is simpler and more direct.
2. The transmission mechanism further comprises a clutch, the driving gear is connected with the hydraulic execution element through the clutch, when the driving motor works, the driven gear rotates to further drive the driving gear to rotate, the driving gear cannot drive the hydraulic execution element to move through the clutch, the situation that the driving motor drives the hydraulic execution element to move when the oil pump works can be avoided, and one-way transmission power is achieved.
3. The hydraulic actuator is hydraulic motor, and hydraulic motor can convert the absorbed potential energy of hydraulic oil into mechanical energy and transmit for the second output shaft for the energy only need carry out once and change and can carry out recycle, makes the recovery process simple swift more.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic diagram of a hydraulic system according to an embodiment of the present invention.
Description of the reference numerals:
10. a drive motor; 21. an oil pump; 22. an oil cylinder; 23. a first direction changing valve; 31. a driving gear; 32. a driven gear; 33. a hydraulic motor; 34. a one-way valve; 35. a second directional control valve; 36. a controller; 37. a clutch; 40. a filter; 50. and a hydraulic oil tank.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the hydraulic system for recovering potential energy of the present embodiment includes: the hydraulic control system comprises a driving motor 10, an oil pump 21, an oil cylinder 22, a first reversing valve 23, a hydraulic actuating element and a transmission mechanism, wherein the driving motor 10 is provided with a first output shaft; the oil pump 21 is connected with the first output shaft; the oil cylinder is provided with a rodless cavity and a rod cavity; the first reversing valve 23 is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port, the oil inlet is communicated with an oil outlet of the oil pump 21, the first working oil port is communicated with the rodless cavity, and the second working oil port is communicated with the rod cavity; the hydraulic actuating element is communicated with the oil return port; the transmission mechanism is connected with the first output shaft and connected with the hydraulic execution element, and the hydraulic execution element drives the first output shaft to rotate through the transmission mechanism.
By applying the hydraulic system for recovering potential energy of the embodiment, the oil return port of the first reversing valve 23 is connected with the hydraulic execution element, the driving motor 10 drives the oil pump 21 to input hydraulic oil into the rod cavity or the rodless cavity in the oil cylinder 22, the hydraulic oil flowing out of the rodless cavity or the rod cavity of the oil cylinder 22 flows into the hydraulic execution element through the oil return port of the first reversing valve 23, the hydraulic execution element can be driven to move, the hydraulic execution element drives the first output shaft to rotate through the transmission mechanism, a positive load is provided for the driving motor 10, the electric energy required by the driving motor 10 for driving the oil pump 21 is reduced, the electric energy consumption of the motor is reduced, an energy-saving effect is achieved, potential energy recovery and utilization are realized, the problems that the potential energy recovery process of the moving part of the electric excavator in the prior art is complicated and the recovery structure is complex are effectively solved, and the potential energy recovery mode is simpler and more direct.
In this embodiment, drive mechanism includes intermeshing's driving gear and driven gear, and the driving gear is connected with hydraulic actuator, and the driven gear cover is established on first output shaft and is rotated with first output shaft is together, and simple structure and transmission are reliable, and the replaceability of gear is good simultaneously for the later maintenance process is more convenient. It will be appreciated that, as an alternative embodiment, the transmission may be a worm and worm transmission, or may be other transmission forms such as a pulley transmission, a chain transmission, etc.
Specifically, the driven gear 32 is sleeved on the first output shaft and rotates together with the first output shaft.
Preferably, the driving gear 31 and the driven gear 32 are both helical gears, and the helical gears have better transmission effect and more reliable structure. It will be appreciated that the drive gear 31 and the driven gear 32 may also be spur gears.
In this embodiment, drive mechanism still includes clutch 37, and driving gear 31 passes through clutch 37 and is connected with hydraulic actuator, and when need not to retrieve the potential energy, driving motor 10 alone works, and first output shaft drives driven gear 32 rotatory and then drives driving gear 31 rotatory, and driving gear 31 can't drive hydraulic actuator through clutch 37 and move this moment, can avoid driving motor 10 alone to drive oil pump 21 during operation influence hydraulic actuator, realizes one-way transmission power. Preferably, the clutch 37 is a one-way clutch, which does not need to be controlled, simplifying control of the hydraulic system. It will be appreciated that, as an alternative embodiment, the clutch may be an electromagnetic clutch, a friction clutch, or the like, in which case the clutch 37 has an engaged state and a disengaged state, the hydraulic actuator transmits power to the drive gear 31 when the clutch 37 is in the engaged state, and the hydraulic actuator cannot transmit power to the drive gear 31 and the drive gear 31 cannot transmit power to the hydraulic actuator when the clutch 37 is in the disengaged state.
Specifically, the oil cylinders include an arm cylinder and a boom cylinder, when an arm of the electric excavator is retracted or a boom descends, the hydraulic actuator may actively drive the driving gear 31 to rotate through the one-way clutch, and then drive the first output shaft of the driving motor 10 to rotate, when the arm of the electric excavator is extended or the boom ascends, the first output shaft of the driving motor 10 drives the driving gear 31 to rotate, and the driving gear 31 does not affect the hydraulic actuator through the one-way clutch 37, so that the hydraulic actuator can realize one-way transmission.
In this embodiment, the hydraulic actuator is hydraulic motor 33, hydraulic motor 33 has the second output shaft, the second output shaft is connected with drive mechanism, hydraulic motor 33's oil inlet and oil return opening are connected, hydraulic system still includes hydraulic tank 50, hydraulic motor 33's oil-out, the oil return opening communicates with hydraulic tank 50 respectively, hydraulic motor 33 can be turned into mechanical energy with the absorbed potential energy of hydraulic oil and transmits for first output shaft, make the energy only need carry out once conversion and can carry out recycle, make the recovery process simple swift more. It will be appreciated that, as an alternative embodiment, the hydraulic actuator is a hydraulic cylinder, in which case the transmission mechanism is a rack and pinion mechanism or the like.
In this embodiment, the hydraulic system further includes a check valve 34 for making the oil return port conduct to the hydraulic oil tank 50 in one direction, the check valve 34 is connected in parallel with the hydraulic motor 33, and when hydraulic oil cannot pass through the hydraulic motor 33, the hydraulic oil can enter the hydraulic oil tank 50 through the check valve 34, so that the pressure of the hydraulic circuit is not too large, and the hydraulic circuit is effectively protected. It will be appreciated that, as an alternative embodiment, a relief valve may be used instead of the check valve 34.
In this embodiment, the hydraulic system further includes a second direction valve 35, the second direction valve 35 is disposed between the oil return port and the hydraulic actuator, the second direction valve 35 has an open state for communicating the oil return port with the hydraulic actuator and a closed state for blocking the oil return port from the hydraulic actuator, and when the potential energy does not need to be recovered, the second direction valve 35 is in the closed state, so as to prevent the hydraulic oil from entering the hydraulic motor 33 and causing energy waste.
In this embodiment, the second directional valve 35 is an electromagnetic directional valve, the hydraulic system further includes a controller 36, the controller 36 is electrically connected to the electromagnetic directional valve and the driving motor 10, when the arm is retracted or the boom is lowered, the driving motor 10 gives a signal to the controller 36, and the controller 36 switches the second directional valve 35 to an open state, so that the communication and the blocking of the hydraulic oil circuit are automatically controlled. It is understood that, as an alternative embodiment, the second direction valve 35 may also be a direct-acting solenoid valve, and may also be a valve body in other forms such as a pneumatic direction valve or a hydraulic direction valve.
In this embodiment, the oil cylinder 22 includes at least one of a boom oil cylinder and an arm oil cylinder, both of the boom oil cylinder and the arm oil cylinder may implement potential energy recovery, and the specific number of the boom oil cylinder and the arm oil cylinder may vary according to different models. It should be noted that the hydraulic system for recovering potential energy is not limited to the boom cylinder and the arm cylinder, and other cylinders on the electric excavator or other engineering machines that can recover potential energy may be used.
Specifically, as shown in fig. 1, when the first directional valve 23 is a three-position four-way directional valve and the oil cylinder 22 is two boom cylinders connected in parallel, and the boom descends, the three-position four-way directional valve is located at the left position to supply oil to the rod chamber of the boom cylinder, and the hydraulic oil in the rodless chamber flows out and enters the hydraulic motor 33; when the movable arm ascends, the three-position four-way reversing valve is positioned at the right position, oil is supplied to the rodless cavity, and hydraulic oil in the rod cavity flows out and enters the hydraulic oil tank 50. When the oil cylinder 22 is a bucket rod oil cylinder and the bucket rod is internally received, the three-position four-way reversing valve is positioned at the right position, oil is supplied to a rodless cavity of the bucket rod oil cylinder, and hydraulic oil in a rod cavity flows out; when the bucket rod is unfolded, the three-position four-way reversing valve is located at the left position, oil is supplied to a rod cavity of the bucket rod oil cylinder, and hydraulic oil in a rodless cavity flows out. It should be noted that the three-position, four-way reversing valve is only used as an example for one specific embodiment, and the type of the specific valve can be changed according to the needs. Here, "left" refers to a position in a direction indicated by "left" in fig. 1, and "right" refers to a position in a direction indicated by "right" in fig. 1.
In the present embodiment, the number of the oil pumps 21 is at least one, the number of the cylinders is at least one, the numbers of the oil pumps 21 and the cylinders can be changed as needed, and the hydraulic system for recovering potential energy can be applied to hydraulic circuits of various structures.
In this embodiment, the hydraulic system further includes a filter 40, the filter 40 is disposed between the oil return port and the hydraulic oil tank 50, the hydraulic oil flows into the hydraulic oil tank 50 after being filtered by the filter 40, so as to effectively filter impurities in the hydraulic oil path and prevent contaminants from entering the hydraulic oil tank 50.
The following describes the manner of use of the hydraulic system for recovering potential energy according to the present embodiment:
when the arm of the electric excavator is retracted or the movable arm descends, the first reversing valve 23 corresponding to the arm and the movable arm is in a corresponding working state at the moment, and the second reversing valve 35 is in an opening state; the driving motor 10 drives the oil pump 21 to supply oil, and hydraulic oil enters one cavity of the oil cylinder 22 through an oil inlet of the first reversing valve 23; along with the movement of the moving part of the electric excavator, hydraulic oil in the other cavity of the oil cylinder 22 flows into the hydraulic motor 33 through an oil return port of the first reversing valve 23; the second output shaft of the hydraulic motor 33 drives the driving gear 31 to rotate, and the driving gear 31 drives the driven gear 32 on the first output shaft to rotate, so that the potential energy recovery process is completed.
The utility model also provides an engineering machine tool, it includes: the hydraulic system is described above.
In this embodiment, the engineering machine is an electric excavator, an electric crane, an electric rotary drilling rig, or the like.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1. an oil return port of the first reversing valve 23 is connected with a hydraulic execution element, when an arm of the electric excavator is retracted or a movable arm of the electric excavator descends, the driving motor 10 drives the oil pump 21 to input hydraulic oil to the oil cylinder 22, the hydraulic oil in the oil cylinder 22 is output and drives the hydraulic execution element to move, the hydraulic execution element drives the first output shaft to rotate through the transmission mechanism, a positive load is provided for the driving motor 10, electric energy required by the driving motor 10 to drive the oil pump 21 is reduced, the purpose of reducing electric energy consumption is achieved, energy saving and potential energy recycling are further achieved, and a recycling mode is simpler and more direct.
2. The potential energy of the descending of the movable arm or the inward contraction of the arm drives the hydraulic motor 33 to rotate through hydraulic oil, the potential energy of the descending of the movable arm or the inward contraction of the arm can be converted into mechanical energy to be transmitted to the first output shaft, the energy can be recycled only through once conversion, and the recycling process is simple and rapid.
3. A second reversing valve 35 is arranged between the oil return port and the hydraulic actuator, and signals are given to a controller 36 through the driving motor 10, so that the communication and the blockage of a hydraulic oil loop are automatically controlled.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A hydraulic system for recovering potential energy, comprising:
a drive motor (10) having a first output shaft;
an oil pump (21) connected to the first output shaft;
a cylinder (22) having a rodless chamber and a rod chamber;
the first reversing valve (23) is provided with an oil inlet, an oil return port, a first working oil port and a second working oil port, the oil inlet is communicated with an oil outlet of the oil pump (21), the first working oil port is communicated with the rodless cavity, and the second working oil port is communicated with the rod cavity;
the hydraulic actuating element is communicated with the oil return port;
and the transmission mechanism is connected with the first output shaft and the hydraulic execution element, and the hydraulic execution element drives the first output shaft to act through the transmission mechanism.
2. The hydraulic system of claim 1, wherein the transmission mechanism comprises a driving gear (31) and a driven gear (32) which are engaged with each other, the driving gear (31) is connected with the hydraulic actuator, and the driven gear (32) is sleeved on the first output shaft and rotates together with the first output shaft.
3. The hydraulic system of claim 2, wherein the transmission further comprises a clutch (37), and the drive gear (31) is connected to the hydraulic actuator via the clutch (37).
4. The hydraulic system according to any one of claims 1 to 3, characterized in that the hydraulic actuator is a hydraulic motor (33), the hydraulic motor (33) has a second output shaft, the second output shaft is connected with the transmission mechanism, an oil inlet of the hydraulic motor (33) is connected with the oil return port, the hydraulic system further comprises a hydraulic oil tank (50), and the oil outlet and the oil return port of the hydraulic motor (33) are respectively communicated with the hydraulic oil tank (50).
5. Hydraulic system according to claim 4, characterised in that it further comprises a one-way valve (34) for one-way communication of the return port to the hydraulic reservoir (50), which one-way valve (34) is arranged in parallel with the hydraulic motor (33).
6. A hydraulic system according to any one of claims 1-3, characterized in that the hydraulic system further comprises a second direction valve (35), the second direction valve (35) being arranged between the oil return and the hydraulic actuator, the second direction valve (35) having an open state communicating the oil return with the hydraulic actuator and a closed state blocking the oil return with the hydraulic actuator.
7. The hydraulic system of claim 6, wherein the second directional valve (35) is a solenoid directional valve, the hydraulic system further comprising a controller (36), the controller (36) being electrically connected to the solenoid directional valve and the drive motor (10).
8. The hydraulic system of any one of claims 1-3, wherein the cylinder (22) comprises at least one of a boom cylinder and an arm cylinder.
9. A hydraulic system according to any one of claims 1-3, characterized in that the number of oil pumps (21) is at least one and/or the number of cylinders (22) is at least one.
10. A work machine, comprising: the hydraulic system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396046.2U CN218377110U (en) | 2022-09-08 | 2022-09-08 | Hydraulic system for recovering potential energy and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396046.2U CN218377110U (en) | 2022-09-08 | 2022-09-08 | Hydraulic system for recovering potential energy and engineering machinery |
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| Publication Number | Publication Date |
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| CN218377110U true CN218377110U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222396046.2U Active CN218377110U (en) | 2022-09-08 | 2022-09-08 | Hydraulic system for recovering potential energy and engineering machinery |
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| CN (1) | CN218377110U (en) |
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