CN211288324U - Hydraulic filtering device - Google Patents
Hydraulic filtering device Download PDFInfo
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- CN211288324U CN211288324U CN201921461950.9U CN201921461950U CN211288324U CN 211288324 U CN211288324 U CN 211288324U CN 201921461950 U CN201921461950 U CN 201921461950U CN 211288324 U CN211288324 U CN 211288324U
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Abstract
The utility model relates to a hydraulic pressure filter equipment, it is used for hydraulic system, and this hydraulic pressure filter equipment includes: the oil filter receives pressure oil from an oil tank in a hydraulic system, and an oil outlet of the oil filter is connected with an oil inlet of the oil tank; a first check valve connected in parallel with the oil filter; and the differential pressure signal generator is used for detecting the pressure of the inlet and outlet oil of the oil filter and generating a signal when the differential pressure value is increased to a preset set value. The utility model is used for solve current filtration mode receive hydraulic system work influence big, the poor problem of filtering quality.
Description
Technical Field
The utility model belongs to the technical field of the casting machinery, concretely relates to hydraulic pressure filter equipment.
Background
For a hydraulic system, if the oil cleanliness is not in accordance with the requirement, part abrasion can be caused, noise is generated, and the like are unfavorable for the working of the hydraulic system, and hydraulic elements can be damaged in serious conditions to cause mechanical failure. According to the relevant national materials, more than half of the hydraulic system failures are caused by the fact that the cleanliness of hydraulic oil is not satisfactory. In order to ensure the stability of the hydraulic system during working and protect components, different types of filters can be reasonably selected according to the factors of the hydraulic system, such as the oil cleaning precision, different requirements of different hydraulic elements on the oil cleanliness and the like, so as to ensure the safety and high efficiency of the working process of the hydraulic system.
In a hydraulic system for a casting machine in the market at present, the hydraulic system is generally filtered by adopting two filtering modes, namely an oil suction filter and an oil return filter. The oil suction filter is generally a coarse filter and is arranged at an oil suction port of the oil pump to protect the oil pump and other hydraulic elements so as to avoid sucking polluted impurities; the return oil filter is used for return oil filtration of a hydraulic system, and is used for filtering pollutants generated by metal particles and heart sealing elements in the hydraulic system due to component abrasion, so that oil flowing back to an oil tank is kept clean. However, the working environment of the casting machine is relatively harsh, and the hydraulic system is easily contaminated during the working process, which requires that the cleaning capacity of the hydraulic system for contaminants must be high. The two common modes of oil suction filtration and oil return filtration can not ensure the cleanliness of oil in the working process of the whole hydraulic system, and in addition, the influence of the flow and the pressure on the oil filtration capacity of an oil filter of a main oil way is different due to the fluctuation of the flow and the pressure of the system when different stations work in the working process of a casting machine. Moreover, because the oil filter is arranged in the main oil circuit, when the whole hydraulic system stops working, the hydraulic oil is not filtered any more, but the surrounding environment still pollutes the hydraulic system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydraulic pressure filter equipment for solve current filtration mode receive hydraulic system work to influence big, the poor problem of filtering quality.
In order to solve the technical problem, the utility model provides a following technical scheme solves:
a hydraulic filter arrangement for a hydraulic system, the hydraulic filter arrangement comprising: the oil filter receives pressure oil from an oil tank in the hydraulic system, and an oil outlet of the oil filter is connected with an oil inlet of the oil tank; a first one-way valve in parallel with the oil filter; and the differential pressure signal transmitter is used for detecting the pressure of the inlet and outlet oil of the oil filter and transmitting a signal when the differential pressure value is increased to a preset set value.
The hydraulic filter device as described above further includes: a power source; and the hydraulic pump is driven by the power source and is used for sucking oil in the oil tank and pumping out pressure oil, and the oil inlet of the oil filter is connected with the oil outlet of the hydraulic pump.
In the hydraulic filter device as described above, the oil filter is a high-precision filter.
In the hydraulic filter device as described above, the high-precision filter has a filtration precision selected to be 2 to 5 μm.
The hydraulic filtering device further comprises a second one-way valve and a pressure reducing valve, wherein the second one-way valve is arranged between the oil outlet of the hydraulic pump and the inlet of the pressure reducing valve, and the outlet of the pressure reducing valve is connected with the oil inlet of the oil filter.
The hydraulic filter device as described above further includes a throttle valve connected between an outlet of the pressure reducing valve and an oil inlet of the oil filter.
Compared with the prior art, the utility model discloses an advantage and beneficial effect are: the oil filtering loop in the hydraulic filtering device is independent of the main oil way of the hydraulic system, oil filtering is realized in a self-circulation mode without being influenced by normal work of the hydraulic system, the oil filtering cleanliness is improved, the influence of flow and pressure fluctuation of the system when the hydraulic system works at different stations is avoided, the flow fluctuation is small, and the filtering performance is stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below 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 is a schematic structural diagram of a first embodiment of the hydraulic filtering device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that 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 efforts belong to the protection scope of the present invention.
In order to filter oil in the hydraulic system when the hydraulic system does not work, and improve oil cleanliness and oil filtering performance, as shown in fig. 1, the embodiment relates to a hydraulic filtering device, which is used for the hydraulic system, and the hydraulic filtering device includes: an oil filter 1 which receives pressure oil from an oil tank 2 in a hydraulic system, and an oil outlet of the oil filter 1 is connected with an oil inlet of the oil tank 2; a first check valve 3 connected in parallel with the oil filter 1; and a differential pressure transmitter 4 for detecting the pressure of the inlet/outlet oil of the oil filter 1 and transmitting a signal when the differential pressure value increases to a preset setting value.
For example, in a horizontal knockout molding auxiliary system in a casting machine, typical actions of a horizontal molding line include pushing, pressing a steel bushing, pushing a casting mold, transferring a trolley, transferring a bushing-type steel bushing, and the like, different production lines are composed of different actions, each action is matched with a corresponding valve group, and when different stations work, oil pressure and flow in a main oil path fluctuate.
In order to prevent damage to the oil filter 1 when pressure fluctuations are large, as shown in fig. 1, in the present embodiment, a first check valve 3 is connected in parallel to the oil filter 1. It is possible to integrate the first non return valve 3 inside the oil filter 1, the set pressure of the first non return valve 3 being lower than the maximum pressure that the oil filter 1 can withstand.
In the first embodiment, the hydraulic filtering apparatus of the present embodiment may be separately provided with the power source 5 and the hydraulic pump 6 driven by the power source 5, the power source 5 uses an engine or a motor to drive the hydraulic pump 6, the hydraulic pump 6 sucks the oil in the oil tank 2 and pumps out the pressure oil, the oil inlet of the oil filter 1 is connected to the oil outlet of the hydraulic pump 6, and the oil outlet of the oil filter 1 is connected to the oil inlet of the oil tank 2, in this case, the oil filter circuit of the hydraulic filtering apparatus is completely independent of the main oil circuit of the hydraulic system. In a first embodiment, the hydraulic pump 6 can be selected as a low flow hydraulic pump, for example, a vane pump model PV2R1-4-RRF, the flow rate is 4ml/R, the low flow hydraulic pump has a small flow rate, the flow rate fluctuation in the filtering loop is reduced, and the filtering performance is improved. In the second embodiment, when the space requirement of the hydraulic station is relatively strict, the hydraulic filtering device is not designed with a power source and a hydraulic pump but is shared with the power source and the hydraulic pump in the hydraulic system, the oil filter 1 can receive the pressure oil sent by the hydraulic pump in the hydraulic system from the oil tank 2, namely, the pressure oil is branched to pass through the oil filter 1 before the hydraulic pump of the hydraulic system pumps the pressure oil into the main oil way, and then the pressure oil is filtered by the oil filter 1 and then returns to the oil tank 2, and the oil filtering loop is still independent of the main oil way.
In any embodiment, the oil filter 1 selects a high-precision filter, such as a filter of type B-32, the filtering precision reaches NAS6 grade, and the filtering precision reaches about 3-5 microns, so that the high-precision filtering of the filter is realized, and the oil purity is improved. This oil filter 1 is equipped with independent differential pressure signaling apparatus 4, and when hydraulic system worked, the filter core of oil filter 1 was blockked up because of the pollutant in the interception system makes the filter core gradually, and the pressure of the exit oil of oil filter 1 produced the pressure differential, and when the pressure differential value increased to the preset setting value of differential pressure signaling apparatus 4, differential pressure signaling apparatus 4 sent the signal automatically, and the instruction should wash or change the filter core to operating personnel, ensured hydraulic system safe operation.
In either embodiment, since the hydraulic filtering device is not affected by the main oil circuit of the hydraulic system, the oil in the oil tank 2 is filtered in a self-circulation manner, in order to ensure the continuity of the oil filtering, a second check valve 7 and a pressure reducing valve 8 are arranged between the oil filter 1 and a hydraulic pump (in the first embodiment, the hydraulic pump is a hydraulic pump 6, and in the second embodiment, the hydraulic pump is a raw hydraulic pump in the hydraulic system), the second check valve 7 is arranged between the oil outlet of the hydraulic pump 6 and the inlet of the pressure reducing valve 8, and the outlet of the pressure reducing valve 8 is connected with the oil inlet of the oil filter 1, wherein the set pressure of the second check valve 7 is slightly lower than the set pressure of the overflow valve of the hydraulic system, and the set pressure of the first check valve 3 is higher than the set pressure of the second check valve 7 and lower than the maximum pressure which the oil filter 1 can bear. And a throttle valve (not shown) is provided in series with the oil filter 1 before entering the oil filter 1 in order to ensure flow stability, and specifically, a throttle valve may be provided after the second check valve 7 and the pressure reducing valve 8 are set, the throttle valve being connected between the outlet of the pressure reducing valve 8 and the oil inlet of the oil filter 1.
The oil filtering loop in the hydraulic filtering device is independent of a main oil way of a hydraulic system, self-circulation type filtering is realized without being influenced by normal work of the hydraulic system, the filtering effect of oil in an oil tank 2 is improved, and high-precision oil filtering is realized by selecting the high-precision oil filter 1; the small-flow hydraulic pump 6 is selected, and is not influenced by flow and pressure caused by station change of a hydraulic system, flow fluctuation is small, and filtering performance is stable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. A hydraulic filtering device is used for a hydraulic system, and is characterized in that an oil way of the hydraulic filtering device is parallel to a main oil way of the hydraulic system; the hydraulic filtering device comprises:
a power source;
a hydraulic pump driven by the power source for sucking oil in the oil tank and pumping out pressure oil; an oil inlet of the oil filter is connected with an oil outlet of the hydraulic pump;
an oil filter, an oil inlet of which is communicated with an oil outlet of the hydraulic pump, and an oil outlet of the oil filter is communicated with an oil inlet of the oil tank;
a first one-way valve in parallel with the oil filter;
and the differential pressure signal transmitter is used for detecting the differential pressure value between the oil inlet and the oil outlet of the oil filter and transmitting a signal when the differential pressure value is increased to a preset set value.
2. The hydraulic filter arrangement according to claim 1, wherein the oil filter is a high-precision filter.
3. The hydraulic filter arrangement according to claim 2, wherein the filter precision of the high-precision filter is selected to be 2 to 5 micrometers.
4. The hydraulic filtering device according to claim 3, further comprising a second check valve and a pressure reducing valve, the second check valve being disposed between an oil outlet of the hydraulic pump and an inlet of the pressure reducing valve, an outlet of the pressure reducing valve being connected to an oil inlet of the oil filter.
5. The hydraulic filtering device according to claim 4, further comprising a throttle valve connected between an outlet of the pressure reducing valve and an oil inlet of the oil filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921461950.9U CN211288324U (en) | 2019-09-04 | 2019-09-04 | Hydraulic filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921461950.9U CN211288324U (en) | 2019-09-04 | 2019-09-04 | Hydraulic filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288324U true CN211288324U (en) | 2020-08-18 |
Family
ID=72016326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921461950.9U Active CN211288324U (en) | 2019-09-04 | 2019-09-04 | Hydraulic filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211288324U (en) |
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2019
- 2019-09-04 CN CN201921461950.9U patent/CN211288324U/en active Active
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