CN217761544U - Accumulator charging system and engineering machinery - Google Patents
Accumulator charging system and engineering machinery Download PDFInfo
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- CN217761544U CN217761544U CN202221994388.8U CN202221994388U CN217761544U CN 217761544 U CN217761544 U CN 217761544U CN 202221994388 U CN202221994388 U CN 202221994388U CN 217761544 U CN217761544 U CN 217761544U
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Abstract
The utility model provides an energy storage ware filling system and engineering machine tool, wherein, energy storage ware filling system includes hydraulic oil source, energy storage ware, auto-change over device, pressure measurement device and controlling means. The switching device is suitable for enabling the hydraulic oil source to be communicated with the energy accumulator or enabling the hydraulic oil source to be isolated from the energy accumulator; the pressure measuring device is suitable for measuring the oil pressure in the accumulator; the control device is connected with the switching device and the pressure measuring device. When the pressure in the energy accumulator is smaller than the preset value, the control device controls the switching device to enable the hydraulic oil source to be communicated with the energy accumulator, and then the energy accumulator is charged. When the pressure in the energy accumulator is larger than the preset value, the control device controls the switching device to enable the hydraulic oil source to be separated from the energy accumulator, and therefore the energy accumulator is not filled with liquid. The structure can control the state of the switching device through the control device according to the real-time pressure in the energy accumulator, and the energy accumulator can be accurately charged.
Description
Technical Field
The utility model relates to a braking hydraulic system technical field, concretely relates to energy storage ware charging system and engineering machine tool.
Background
The safety and stability of the brake system are always one of the most important signs in the development and application of the wheel excavator. The brake system of the wheel type excavator mainly comprises hydraulic components such as a brake valve, an energy accumulator, a check valve group, a charging valve, a gear pump and the like. The charging principle of the brake charging system in the prior art is shown in fig. 1, and the brake charging system comprises a pressure compensator 1', a check valve 2' and a pilot control 3'. The working principle is as follows: hydraulic oil enters from the port P, one path of hydraulic oil flows into the port S1 and the port S2 through the check valve flow 2' to charge the accumulator, and the other path of hydraulic oil flows into the pilot port on the right side of the pressure compensator 1' to push the valve core in the pressure compensator 1' to throttle the flow of the hydraulic oil. The pilot control 3' controls hydraulic oil to be charged into the energy accumulator under the control of the pressure at the position of the one-way valve 2' and the pressure of the spring at the right pilot position of the pilot control 3'. Specifically, when the pressure at the check valve 2' is smaller than the preset value, the hydraulic oil flows into the accumulator through the check valve 2', and when the pressure at the check valve 2' is greater than the preset value, the ports P and N in fig. 1 are communicated, and the hydraulic oil flows back to the oil tank.
However, in the liquid charging system, after a period of use, the spring of the pilot control 3 'and the check valve 2' are worn, the pressure at the S1 and the S2 is rapidly reduced, and the pressure in the accumulator cannot be accurately reflected, so that the accumulator is frequently in a liquid charging state.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the present invention is to overcome the defect that after the hydraulic component of the brake charging system in the prior art is worn and worn for a period of time, the pressure in the energy accumulator can not be accurately reflected, so that the energy accumulator is frequently in a charging state, thereby providing an energy accumulator charging system and an engineering machine.
In order to solve the problem, the utility model provides an energy storage ware charging system, including hydraulic oil source, energy storage ware, auto-change over device, ressure measurement device and controlling means. The switching device is connected with both the hydraulic oil source and the energy accumulator and is suitable for communicating the hydraulic oil source with the energy accumulator or isolating the hydraulic oil source from the energy accumulator; the pressure measuring device is suitable for measuring the oil pressure in the accumulator; the control device is connected with the switching device and the pressure measuring device.
Optionally, the switching device is a reversing valve, an oil inlet of the reversing valve is communicated with the hydraulic oil source through a first pipeline, a first working oil port of the reversing valve is communicated with an inlet of the energy accumulator through a second pipeline, and a second working oil port of the reversing valve is communicated with an external oil tank through a third pipeline.
Optionally, the accumulator charging system further comprises a one-way flow structure, the one-way flow structure is arranged on the second pipeline, and the one-way flow structure is suitable for enabling hydraulic oil to flow from the reversing valve to the accumulator in a one-way mode.
Optionally, a pressure measuring device is disposed on the second conduit between the one-way flow structure and the accumulator.
Optionally, the one-way flow structure is a one-way valve.
Optionally, the accumulator comprises a first accumulator and a second accumulator, the second conduit comprises a first branch conduit and a second branch conduit, the first branch conduit communicates with the inlet of the first accumulator, and the second branch conduit communicates with the inlet of the second accumulator.
Optionally, the number of the pressure measuring devices is two, and the two pressure measuring devices are respectively arranged on the first branch pipeline and the second branch pipeline.
Optionally, the number of the one-way flow structures is two, and the two one-way flow structures are respectively arranged on the first branch pipeline and the second branch pipeline.
Optionally, the accumulator charging system further comprises a valve block, and the accumulator and the reversing valve are both disposed on the valve block.
The utility model also provides an engineering machine tool, including foretell energy storage ware charging system.
The utility model has the advantages of it is following:
1. utilize the technical scheme of the utility model. The pressure measuring device can accurately measure the pressure in the energy accumulator. When the pressure in the energy accumulator is smaller than the preset value, the control device controls the switching device to enable the hydraulic oil source to be communicated with the energy accumulator, and then the energy accumulator is charged. When the pressure in the energy accumulator is larger than the preset value, the control device controls the switching device to enable the hydraulic oil source to be separated from the energy accumulator, and therefore the energy accumulator is not filled with liquid. The structure can control the state of the switching device through the control device according to the real-time pressure in the energy accumulator, so that the energy accumulator can be accurately charged, and the condition that the energy accumulator is frequently charged due to abrasion of a hydraulic element is avoided. Therefore the technical scheme of the utility model the hydraulic component who has solved the brake fluid filling system among the prior art uses the back of wearing and tearing for a period, and the pressure in the accurate reflection energy storage ware leads to the energy storage ware frequently to be in the defect of liquid filling state.
2. The reversing valve can be reliably switched to enable the oil to be communicated with the energy accumulator or the oil tank, and meanwhile the control device controls the reversing valve to be powered on or powered off according to the measuring structure of the pressure sensor.
3. The one-way valve prevents the hydraulic oil from flowing back from the energy accumulator, and the effect of maintaining pressure is achieved.
4. The energy accumulator and the reversing valve are integrally installed on the same valve block, so that the structure is compact and the cost is low.
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 illustrates a hydraulic schematic of a prior art brake accumulator pet charging system;
FIG. 2 illustrates a hydraulic schematic of the accumulator charging system of the present invention; and
fig. 3 shows a schematic assembly of the accumulator, the switching device and the valve block of the accumulator charging system of fig. 1.
Description of reference numerals:
1. a first pipeline; 2. a second pipeline; 21. a first branch line; 22. a second branch pipe; 3. a third pipeline; 10. an accumulator; 11. a first accumulator; 12. a second accumulator; 20. a switching device; 30. a pressure measuring device; 40. a control device; 50. a one-way flow structure; 60. and a valve block.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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 should 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 present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 2, the accumulator charging system of the present embodiment includes a hydraulic oil source, an accumulator 10, a switching device 20, a pressure measuring device 30, and a control device 40. Wherein the switching device 20 is connected to both the hydraulic oil source and the accumulator 10, the switching device 20 being adapted to communicate the hydraulic oil source with the accumulator 10 or to isolate the hydraulic oil source from the accumulator 10. The pressure measuring device 30 is adapted to measure the oil pressure in the accumulator 10. The control device 40 is connected to both the switching device 20 and the pressure measuring device 30.
The technical scheme of the embodiment is utilized. The pressure measuring device 30 can accurately measure the pressure in the accumulator 10. When the pressure in the accumulator 10 is smaller than the predetermined value, the control device 40 controls the switching device 20 to communicate the hydraulic oil source with the accumulator 10, thereby charging the accumulator 10. When the pressure in the accumulator 10 is greater than the preset value, the control device 40 controls the switching device 20 such that the hydraulic oil source is blocked from the accumulator 10, so that the accumulator 10 is not charged. The above structure can control the state of the switching device 20 through the control device 40 according to the real-time pressure in the accumulator 10, so as to realize accurate charging of the accumulator 10, and avoid frequent charging of the accumulator caused by abrasion of hydraulic elements. Therefore, the technical scheme of the embodiment overcomes the defect that the pressure in the energy accumulator cannot be accurately reflected after the hydraulic element of the brake charging system in the prior art is worn for a period of time, so that the energy accumulator is frequently in a charging state.
It should be noted that the pressure measuring device 30 in the present embodiment is preferably a pressure sensor, which can accurately reflect the real-time pressure in the accumulator 10 and transmit the pressure value in the accumulator 10 to the control device 40. Further, the accumulator 10 has a normal pressure range L1 to L2, and when the pressure sensor detects that the pressure in the accumulator 10 is less than L1, it indicates that the pressure in the accumulator 10 is low and it is necessary to charge the accumulator. When the pressure sensor detects that the pressure in the accumulator 10 reaches L2, it indicates that the accumulator 10 is full, and the filling needs to be stopped. The control device 40 controls the state of the switching device 20 according to the detection value of the pressure sensor.
Further, the pressure sensor may be provided within the accumulator 10, or on an inlet line of the accumulator 10.
As shown in fig. 2, in the technical solution of the present embodiment, the switching device 20 is a directional control valve, and the directional control valve is a two-position three-way directional control valve, which includes an oil inlet and two working oil ports. Furthermore, an oil inlet of the reversing valve is communicated with a hydraulic oil source through a first pipeline 1, a first working oil port of the reversing valve is communicated with an inlet of the energy accumulator 10 through a second pipeline 2, and a second working oil port of the reversing valve is communicated with an external oil tank through a third pipeline 3.
As can be seen from fig. 2, the direction valve includes a left position and a right position, and when the direction valve is in the left position, the oil inlet is communicated with the external oil tank (i.e., the N node in fig. 1), and the accumulator 10 is not charged. When the reversing valve is in the right position, the oil inlet is communicated with the energy accumulator 10, and the energy accumulator 10 can be filled with liquid at the moment.
Preferably, the reversing valve is a solenoid reversing valve, and the control device 40 can control the power on and power off of the solenoid reversing valve. As will be appreciated by those skilled in the art in conjunction with fig. 2, when it is desired to charge the accumulator 10, the control device 40 controls the solenoid directional valve to be energized and causes the directional valve to be in the right position. When the accumulator 10 is not required to be charged, the control device 40 controls the solenoid valve to be de-energized, and the reversing valve moves to the left position under the action of the spring.
In addition, when a control signal from the pressure sensor or control device 40 fails, the directional control valve is continuously energized and the oil pump continues to charge the accumulator 10. Therefore, an overflow valve (not shown in the figure) needs to be arranged between the oil pump and the reversing valve to ensure that the pressure in the accumulator 10 is always lower than the overflow pressure, and the pressure of the overflow valve needs to be lower than the safe working pressure of the accumulator 10.
Of course, the switching device 20 may be another hydraulic component with a switching function, such as a three-way joint.
As shown in fig. 2, in the solution of the present embodiment, the accumulator charging system further includes a one-way flow structure 50, the one-way flow structure 50 is disposed on the second pipe 2, and the one-way flow structure 50 is adapted to enable one-way flow of the hydraulic oil from the direction changing valve to the accumulator 10.
Specifically, the one-way flow structure 50 is preferably a one-way valve, which can ensure one-way flow of the hydraulic oil from the direction changing valve to the accumulator 10 and prevent the hydraulic oil in the accumulator 10 from flowing backwards, i.e., play a role in maintaining the pressure in the accumulator 10.
At the same time, since the oil outlet line of the non-return valve is connected to the inlet of the accumulator 10, the pressure measuring device 30 is arranged on the second line 2 and between the non-return flow structure 50 and the accumulator 10, i.e. the pressure sensor is able to directly measure the pressure in the accumulator 10.
As shown in fig. 2, in the solution of the present embodiment, the accumulator 10 includes a first accumulator 11 and a second accumulator 12, the second pipeline 2 includes a first branch pipeline 21 and a second branch pipeline 22, the first branch pipeline 21 is communicated with an inlet of the first accumulator 11, and the second branch pipeline 22 is communicated with an inlet of the second accumulator 10.
As can be seen from fig. 2, after the hydraulic oil flows out from the second pipeline 2, the hydraulic oil is divided into two paths, one path of hydraulic oil flows into the first accumulator 11 from the first branch pipeline 21, and the other path of hydraulic oil flows into the second accumulator 12 from the second branch pipeline 22, that is, the first accumulator 11 and the second accumulator 12 are respectively charged with hydraulic oil.
Preferably, the above-mentioned check valves are provided in two, one check valve being provided on the first branch line 21 and the other check valve being provided on the second branch line 22.
As shown in fig. 2, in the solution of the present embodiment, there are two pressure measurement devices 30, and the two pressure measurement devices 30 are respectively disposed on the first branch pipeline 21 and the second branch pipeline 22. That is, two pressure sensors are provided, one of which is used to measure the pressure of the first accumulator 11 and the other of which is used to measure the pressure of the second accumulator 12.
Based on the above configuration, the control device logic of the control device 40 is:
1. after the machine starts, the oil pump can input pressure oil to a port P of the accumulator charging system at once, at the moment, the two pressure sensors respectively monitor the oil pressure of the two accumulators 10, and the control device 40 can analyze and monitor the pressure conditions in the two accumulators 10 at once;
2. when the pressure signal is maintained between L1 and L2, the electromagnetic directional valve is continuously de-energized, the electromagnetic directional valve is in a left position, and oil pumped by the oil pump directly returns to the oil tank through the N port;
3. when the pressure in any accumulator 10 is lower than L1, it indicates that the pressure in the accumulator 10 is relatively low, and liquid needs to be filled, at this time, the control device 40 controls the electromagnetic directional valve to be energized, the electromagnetic directional valve is switched to the right position, and the pressure oil pumped by the oil pump flows into the accumulator 10.
4. When the pressure in the accumulator 10 reaches L2, indicating that the accumulator 10 is full, the control device 40 controls the solenoid valve to lose power and stop charging.
As shown in fig. 3, in the solution of the present embodiment, the accumulator charging system further includes a valve block 60, and both the accumulator 10 and the direction valve are disposed on the valve block 60. Specifically, in the present embodiment, the accumulator 10 and the reversing valve are integrated on the same valve block, so that the occupied volume of the accumulator charging system is greatly reduced, and the structure is simpler than that of the charging hydraulic system in the prior art.
Further, the first accumulator 11 and the second accumulator 12 are installed on the upper surface of the valve block 60, and the direction change valve is installed on the lower surface of the valve block 60. The side of the valve block 60 is provided with a plurality of oil ports.
The accumulator charging system in this embodiment is applied to a braking system, and two nodes BR1 and BR2 shown in fig. 2 are nodes leading to a brake. Of course, those skilled in the art will appreciate that other accumulators in the work machine may also be configured with the charging system of the present embodiment.
The embodiment also provides a construction machine comprising the energy accumulator charging system. Preferably, the work machine is a wheel excavator.
According to the above, the present patent application has the following advantages:
1. the solenoid valve controls whether to fill liquid or not, the logic is simple and convenient, and the implementation is convenient;
2. the pressure sensor can monitor the pressure in the accumulator to avoid frequent liquid filling faults;
3. the controller directly judges the pressure value in the energy accumulator monitored by the pressure sensor to determine whether to charge the liquid;
4. the integrated design of multiple parts reduces the number of parts, facilitates arrangement and reduces cost.
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. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (10)
1. An accumulator charging system, comprising:
a source of hydraulic oil;
an accumulator;
the switching device is connected with the hydraulic oil source and the energy accumulator and is suitable for enabling the hydraulic oil source to be communicated with the energy accumulator or enabling the hydraulic oil source to be isolated from the energy accumulator;
a pressure measurement device adapted to measure an oil pressure within the accumulator;
and the control device is connected with the switching device and the pressure measuring device.
2. The accumulator charging system according to claim 1, wherein the switching device is a directional valve, the directional valve has an oil inlet connected to the hydraulic oil source through a first line, the directional valve has a first working oil port connected to the accumulator inlet through a second line, and the directional valve has a second working oil port connected to an external oil tank through a third line.
3. The accumulator charging system of claim 2, further comprising a one-way flow structure disposed on the second line, the one-way flow structure adapted to provide one-way flow of hydraulic oil from the selector valve to the accumulator.
4. The accumulator charging system of claim 3, wherein the pressure measurement device is disposed on the second line between the one-way flow structure and the accumulator.
5. The accumulator charging system of claim 3, wherein the one-way flow structure is a one-way valve.
6. The accumulator charging system according to any one of claims 3 to 5, wherein the accumulator comprises a first accumulator and a second accumulator, the second conduit comprising a first branch conduit and a second branch conduit, the first branch conduit communicating with an inlet of the first accumulator and the second branch conduit communicating with an inlet of the second accumulator.
7. The accumulator charging system according to claim 6, wherein there are two pressure measuring devices, the two pressure measuring devices being disposed on the first branch line and the second branch line, respectively.
8. The accumulator charging system according to claim 6, wherein there are two of the one-way flow structures, and wherein two of the one-way flow structures are disposed on the first branch line and the second branch line, respectively.
9. The accumulator charging system according to any one of claims 2 to 5, further comprising a valve block, the accumulator and the reversing valve both being disposed on the valve block.
10. A working machine comprising an accumulator charging system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221994388.8U CN217761544U (en) | 2022-07-29 | 2022-07-29 | Accumulator charging system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221994388.8U CN217761544U (en) | 2022-07-29 | 2022-07-29 | Accumulator charging system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217761544U true CN217761544U (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221994388.8U Active CN217761544U (en) | 2022-07-29 | 2022-07-29 | Accumulator charging system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217761544U (en) |
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2022
- 2022-07-29 CN CN202221994388.8U patent/CN217761544U/en active Active
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