CN215672996U - Device for reducing hydraulic impact, hydraulic system and working machine - Google Patents
Device for reducing hydraulic impact, hydraulic system and working machine Download PDFInfo
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- CN215672996U CN215672996U CN202121663406.XU CN202121663406U CN215672996U CN 215672996 U CN215672996 U CN 215672996U CN 202121663406 U CN202121663406 U CN 202121663406U CN 215672996 U CN215672996 U CN 215672996U
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Abstract
The utility model relates to the technical field of hydraulic systems, and provides a device for reducing hydraulic impact, a hydraulic system and an operating machine. The device for reducing hydraulic impact comprises a first oil path, wherein an oil storage cavity and a control valve are arranged on the first oil path, an oil outlet of the oil storage cavity is communicated with an oil inlet of the control valve, and the control valve is used for limiting the outlet pressure of the oil storage cavity. The device for reducing hydraulic impact can continuously play the roles of pressure reduction and energy absorption in a hydraulic system. When the device is installed between the oil inlet of the heat dissipation oil pipe of the air cooler and the oil return port of the main valve, the pressure of hydraulic oil entering the heat dissipation oil pipe can be reduced, and the risk that the heat dissipation oil pipe is exploded by impact is reduced.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to a device for reducing hydraulic impact, a hydraulic system and an operating machine.
Background
Air coolers are used in some hydraulic systems, such as concrete pump trucks, to cool hydraulic oil. Hydraulic oil in the hydraulic system of the concrete pump truck flows back into a heat exchange oil pipe of the air cooler through an oil return opening of the main valve, so that the heat exchange oil pipe of the air cooler bears certain oil return impact pressure. Tests show that the pressure impact between the main valve oil return port and the oil inlet of the heat exchange oil pipe reaches more than 3.5Mpa, and the pressure bearing range of the heat exchange oil pipe is reached. Under long-time impact, the risk that the heat exchange oil pipe is exploded is very high, and the air cooler is easily damaged. Therefore, it is desirable to provide a device capable of reducing hydraulic shock to protect the air cooler.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for reducing hydraulic impact, a hydraulic system and an operating machine, which are used for solving the problem that a heat dissipation oil pipe of an air cooler in the prior art is easy to be exploded under the hydraulic impact of the system.
The utility model provides a device for reducing hydraulic impact, which comprises a first oil path, wherein an oil storage cavity and a control valve are arranged on the first oil path, an oil outlet of the oil storage cavity is communicated with an oil inlet of the control valve, and the control valve is used for limiting the outlet pressure of the oil storage cavity.
According to the device for reducing hydraulic impact provided by the utility model, the first oil path is also provided with a first one-way valve, and an oil outlet of the first one-way valve is communicated with an oil inlet of the oil storage cavity.
The device for reducing hydraulic impact further comprises a second oil path, wherein the first oil path and the second oil path are connected in parallel, and a damping element is arranged on the second oil path.
According to the present invention, there is provided an apparatus for reducing hydraulic shock, wherein the damping member includes a damping hole in a pipe of the second oil passage.
According to the device for reducing the hydraulic impact provided by the utility model, the control valve is one of an overflow valve, a safety valve and a second one-way valve.
The utility model also provides a hydraulic system, which comprises an impact bearing part and any one of the devices for reducing hydraulic impact, wherein an oil outlet of the device for reducing hydraulic impact is connected with an oil inlet pipeline of the impact bearing part.
According to the hydraulic system provided by the utility model, the impact bearing component is a heat dissipation oil pipe in the air cooler.
According to the hydraulic system provided by the utility model, the highest height of the heat dissipation oil pipe is lower than that of the oil storage cavity.
The present invention also provides a working machine comprising any one of the above-described devices for reducing hydraulic shock or any one of the above-described hydraulic systems.
According to the utility model, a working machine is provided, which is a concrete pump truck.
According to the device for reducing hydraulic impact, the hydraulic system and the operation machine, the oil storage cavity and the control valve are arranged, the control valve is used for limiting the outlet pressure of the oil storage cavity, so that a certain amount of hydraulic oil can be collected by the oil storage cavity, and the pressure of the hydraulic oil is buffered in the oil storage cavity. When the pressure in the oil storage cavity exceeds the control pressure of the control valve, the hydraulic oil is released, so that a certain cavity is always reserved in the oil storage cavity, and the device for reducing hydraulic impact always plays the roles of pressure reduction and energy absorption. When the device is installed between the oil inlet of the heat dissipation oil pipe of the air cooler and the oil return port of the main valve, the pressure of hydraulic oil entering the heat dissipation oil pipe can be reduced, and the risk that the heat dissipation oil pipe is exploded by impact is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure of the device for reducing hydraulic shock provided by the present invention;
FIG. 2 is a schematic diagram of a portion of a hydraulic system provided by the present invention;
reference numerals:
10. a first oil passage; 11. An oil storage cavity; 12. A control valve;
13. a first check valve; 20. A second oil passage; 21. A damping element;
100. means for reducing hydraulic shock; 200. And an impact receiving member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The hydraulic shock reducing apparatus and hydraulic system of the present invention will be described with reference to fig. 1 to 2.
The utility model provides a device for reducing hydraulic impact, and as shown in fig. 1, the device for reducing hydraulic impact is a schematic structural diagram. The device for reducing hydraulic shock according to the embodiment of the present invention includes a first oil passage 10. The first oil passage 10 is provided with an oil storage chamber 11 and a control valve 12. An oil outlet of the oil storage cavity 11 is communicated with an oil inlet of the control valve 12, and the control valve 12 is used for limiting the outlet pressure of the oil storage cavity 11. The oil storage cavity 11 is a cavity capable of storing certain hydraulic oil. In order to avoid the injection of the hydraulic oil, the oil storage chamber 11 is usually configured as a closed chamber, such as a closed oil tank or an oil tank.
The device for reducing the hydraulic impact is applied to a hydraulic system, can be installed on a hydraulic oil path of the hydraulic system, and the specific installation position is determined according to the position of a component bearing the hydraulic impact. The oil outlet of the first oil path 10 is connected with the oil inlet of the impact bearing component.
Taking an air cooler in a hydraulic system as an example, the device for reducing hydraulic impact is arranged between an oil return port of a main valve and an oil inlet of the air cooler, and the impact bearing part is a heat dissipation oil pipe in the air cooler. The hydraulic oil flows back from the oil return port of the main valve after being worked by the working device, and enters the heat dissipation oil pipe after passing through the device for reducing hydraulic impact provided by the utility model.
The control valve 12 is used for limiting the outlet pressure of the oil storage cavity 11, and specifically, when the outlet pressure of the oil storage cavity 11 is smaller than the control pressure of the control valve 12, the control valve 12 is closed, and the oil storage cavity 11 is in an energy storage state only when oil is fed but oil is not discharged, so that the oil storage cavity is used for absorbing impact energy of a hydraulic system. Because the oil storage cavity 11 has a certain space, after the high-pressure hydraulic oil enters the oil storage cavity 11, the pressure is reduced, and the high-pressure hydraulic oil is collected in the oil storage cavity 11. When the outlet pressure of the oil storage cavity 11 is greater than the control pressure of the control valve 12, the control valve 12 is opened, part of the hydraulic oil in the oil storage cavity 11 is released, and the control valve 12 is closed again until the pressure in the oil storage cavity 11 is recovered to be lower than the control pressure of the control valve 12. In actual use, the oil storage chamber 11 can be kept in an oil-less state by setting a control pressure of the control valve 12 appropriately.
According to the device for reducing hydraulic impact, the oil storage cavity 11 and the control valve 12 are arranged, the control valve 12 is used for limiting the outlet pressure of the oil storage cavity 11, a certain amount of hydraulic oil can be collected by the oil storage cavity 11, and the pressure of the hydraulic oil is buffered in the oil storage cavity 11. In addition, when the pressure in the oil storage cavity 11 exceeds the control pressure of the control valve 12, the hydraulic oil is released, so that a certain cavity is always reserved in the oil storage cavity 11, and the device for reducing hydraulic impact always plays the roles of reducing pressure and absorbing energy. When the device is installed between the oil inlet of the heat dissipation oil pipe of the air cooler and the oil return port of the main valve, the pressure of hydraulic oil entering the heat dissipation oil pipe can be reduced, and the risk that the heat dissipation oil pipe is exploded by impact is reduced.
Further, in the embodiment of the present invention, the first oil passage 10 is further provided with a first check valve 13. An oil outlet of the first one-way valve 13 is communicated with an oil inlet of the oil storage cavity 11. After a certain amount of hydraulic oil is collected in the oil storage cavity 11, a certain amount of oil pressure is generated in the oil storage cavity 11. During pressure fluctuations in the hydraulic system, there may be situations where the pressure in the reservoir chamber 11 is greater than the system pressure. In this case, the first check valve 13 may prevent the hydraulic oil in the oil storage chamber 11 from flowing backward. Optionally, the cracking pressure of the first check valve 13 is greater than the control pressure of the control valve 12.
The device for reducing hydraulic impact provided by the embodiment of the utility model further comprises a second oil path 20. The first oil passage 10 and the second oil passage 20 are connected in parallel, and the second oil passage 20 is provided with a damping element 21. For example, the oil inlet of the first oil path 10 and the oil inlet of the second oil path 20 are both connected to the main valve oil return port, and the oil outlet of the first oil path 10 and the oil outlet of the second oil path 20 are both connected to the oil inlet of the impact receiving member.
When the hydraulic system oil return pressure is small and smaller than the opening pressure of the first check valve 13, the hydraulic oil returns from the second oil passage 20, and absorbs part of the hydraulic energy through the damping element 21 on the second oil passage 20, so that the oil return impact pressure is reduced. When the hydraulic pump of the hydraulic system is stopped, hydraulic pressure may be returned from the second oil passage 20.
When the hydraulic system oil return pressure is large and is greater than the opening pressure of the first check valve 13, hydraulic oil is returned from the first oil passage 10 and the second oil passage 20 at the same time. The hydraulic oil entering the first oil passage 10 absorbs part of the hydraulic energy through the oil storage cavity 11 to reduce the oil return impact pressure of the first oil passage 10. The hydraulic oil that enters the second oil passage 20 absorbs part of the hydraulic energy through the damping element 21 to reduce the return-oil impact pressure of the second oil passage 20.
The present embodiment can increase the capacity of the apparatus to reduce hydraulic shock by adding one second oil passage 20 with damping. When the oil return pressure is large, so that the damping element 21 greatly restricts the hydraulic flow of the second oil passage 20, most of the hydraulic oil flows to the first oil passage 10, so as to ensure the oil passing amount of the device for reducing hydraulic shock, and simultaneously reduce hydraulic shock through the first oil passage 10.
According to the device for reducing the hydraulic impact provided by the embodiment of the utility model, the first oil path 10 and the second oil path 20 which are connected in parallel are arranged, and the first check valve 13 is arranged on the first oil path 10. So that oil is returned only through the second oil passage 20 when the system pressure is lower than the opening pressure of the first check valve 13. When the system pressure is higher than the opening pressure of the first check valve 13, the hydraulic oil pressures of the first oil passage 10 and the second oil passage 20 are respectively adjusted through the first check valve 13 and the damping element 21, so that the capacity of the device for reducing hydraulic impact is improved, and the oil passing amount of the device is ensured.
In the embodiment of the present invention, the damping element 21 includes a damping hole in the pipe of the second oil passage 20. The orifice is communicated with the second oil passage 20, and the hydraulic oil flowing through the orifice generates pressure drop, so that the outlet pressure of the second oil passage 20 is reduced. The damping element 21 may be a hydraulic damper installed in the pipe of the second oil passage 20, in which a damping hole is provided.
In the embodiment of the present invention, the control valve 12 is one of an overflow valve, a safety valve, and a second check valve. The control valve 12 shown in fig. 1 is a spill valve. The relief valve, the safety valve and the second non return valve are all set to a certain opening pressure, which corresponds to the control pressure of the control valve 12. And opens to release the hydraulic oil when the pressure in the oil storage chamber 11 exceeds the opening pressure of the control valve 12. The control valve 12 may also be used to prevent the oil in the second oil passage 20 from entering the oil storage chamber 11 in the first oil passage 10.
It should be noted that any one of a diaphragm type accumulator, a bladder type accumulator, and a piston type accumulator may be used instead of the oil storage chamber 11 and the control valve 12 in the embodiment of the present invention. The hydraulic shock can be reduced.
The utility model also provides a hydraulic system, which comprises an impact bearing part 200 and the device 100 for reducing hydraulic impact in any embodiment, wherein an oil outlet of the device 100 for reducing hydraulic impact is connected with an oil inlet pipeline of the impact bearing part 200. Fig. 2 is a schematic partial structural diagram of a hydraulic system provided by the present invention.
Specifically, the device 100 for reducing hydraulic shock is installed on a hydraulic oil path of a hydraulic system, and an oil outlet of the first oil path 10 is connected to an oil inlet of a shock-receiving component. The hydraulic shock reducing apparatus 100 is used to reduce the pressure of hydraulic oil entering the shock receiving member 200.
Further, the impact receiving member 200 is a heat radiation oil pipe of an air cooler. Specifically, the air coolers are all mounted on the oil return pipeline. The return oil of the hydraulic system enters the heat dissipation oil pipe of the air cooler through the device 100 for reducing hydraulic impact, so that the risk that the heat dissipation oil pipe is exploded by hydraulic impact can be reduced.
Further, in the embodiment of the present invention, the highest height of the heat dissipation oil pipe is lower than the highest height of the oil storage cavity 11. Therefore, when the pressure in the oil storage cavity 11 is greater than the control pressure of the control valve 12, the hydraulic oil in the oil storage cavity 11 can be discharged smoothly through the control valve 12, so that a certain cavity is kept in the oil storage cavity 11. Optionally, the maximum height of the heat sink oil pipe is lower than the middle of the oil storage cavity 11.
The utility model also provides a working machine which can be a concrete pump truck, an excavator, a crane, a dump truck or a conveyor and the like. The working machine comprises a device for reducing hydraulic shocks as described in any one of the above embodiments or a hydraulic system as described in any one of the above embodiments.
Taking the operation machine as a concrete pump truck as an example, the concrete pump truck realizes the conveying of concrete by using hydraulic pressure. During the heavy-load operation of the concrete pump truck, a hydraulic system of the concrete pump truck generates large load impact and generates a large amount of heat. Therefore, the concrete pump truck is usually provided with an air cooler for cooling the hydraulic oil. According to the utility model, the device 100 for reducing hydraulic impact is arranged at the oil inlet of the heat dissipation oil pipe of the air cooler, so that the pressure of hydraulic oil entering the heat dissipation oil pipe is reduced, and the risk that the heat dissipation oil pipe is impacted and exploded by the pressure of the hydraulic oil is reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The device for reducing hydraulic impact is characterized by comprising a first oil way, wherein an oil storage cavity and a control valve are arranged on the first oil way, an oil outlet of the oil storage cavity is communicated with an oil inlet of the control valve, and the control valve is used for limiting the outlet pressure of the oil storage cavity.
2. The hydraulic shock reducing device according to claim 1, wherein a first check valve is further disposed on the first oil path, and an oil outlet of the first check valve is communicated with an oil inlet of the oil storage cavity.
3. The apparatus of claim 2, further comprising a second oil passage, the first oil passage and the second oil passage being connected in parallel, the second oil passage having a damping element disposed thereon.
4. A device for reducing hydraulic shocks as defined in claim 3, wherein the damping element comprises a damping orifice located in a conduit of the second oil passage.
5. A hydraulic shock reduction apparatus according to claim 1, wherein the control valve is one of a relief valve, a relief valve and a second one-way valve.
6. A hydraulic system, comprising an impact member and a hydraulic shock reducing apparatus according to any one of claims 1 to 5, an oil outlet of said hydraulic shock reducing apparatus being connected to an oil inlet line of said impact member.
7. The hydraulic system of claim 6, wherein the impact-bearing component is a heat sink tubing within the air-cooled vessel.
8. The hydraulic system of claim 7, wherein a maximum height of the heat sink oil pipe is lower than a maximum height of the oil storage cavity.
9. A working machine, characterized in that it comprises a device for reducing hydraulic shocks according to any one of claims 1-5 or a hydraulic system according to any one of claims 6-8.
10. The work machine of claim 9, wherein the work machine is a concrete pump truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663406.XU CN215672996U (en) | 2021-07-21 | 2021-07-21 | Device for reducing hydraulic impact, hydraulic system and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663406.XU CN215672996U (en) | 2021-07-21 | 2021-07-21 | Device for reducing hydraulic impact, hydraulic system and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215672996U true CN215672996U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121663406.XU Active CN215672996U (en) | 2021-07-21 | 2021-07-21 | Device for reducing hydraulic impact, hydraulic system and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215672996U (en) |
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2021
- 2021-07-21 CN CN202121663406.XU patent/CN215672996U/en active Active
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