CN209469649U - Hydraulic filtering system is polluted without bypass - Google Patents
Hydraulic filtering system is polluted without bypass Download PDFInfo
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- CN209469649U CN209469649U CN201920156751.0U CN201920156751U CN209469649U CN 209469649 U CN209469649 U CN 209469649U CN 201920156751 U CN201920156751 U CN 201920156751U CN 209469649 U CN209469649 U CN 209469649U
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- filter core
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Abstract
The utility model discloses a kind of without bypass pollution hydraulic filtering system, belong to hydraulic system filtration art, including pump and hydraulic system, hydraulic filtering system is located between pump and hydraulic system, hydraulic filtering system includes being sequentially connected the main filter connect, auxiliary filter and reversal valve, wherein main filter connection pump, reversal valve connects hydraulic system, main filter and auxiliary filter include filter core, by-passing valve and pressure difference alarm, main filter connects hydraulic system with the filter core of auxiliary filter, by-passing valve in main filter connects the filter core of auxiliary filter, pressure difference alarm is connected to the both ends of filter core in main filter and auxiliary filter, it can solve when hydraulic oil oil temperature is low or filter core blocks, it bypasses hydraulic oil and is directly entered hydraulic system without filtering, the problem of polluting hydraulic system.
Description
Technical field
Hydraulic filtering system is polluted without bypass the utility model relates to a kind of, belongs to hydraulic system filtration art.
Background technique
The effect of hydraulic filter is to filter the various impurity occurred in hydraulic system, mainly solid particle, main
Component part is filter core, and function more has by-passing valve and alarm；After filter core blocking to a certain extent, alarm can be reported
Alert, section hydraulic oil flows away from by-passing valve.Can all there be filter in the hydraulic system of nearly all equipment, according to making for filter
Oil absorption filter, in-line filter, return filter etc. can be divided into position difference.Wherein in-line filter is typically mounted at
Between pump and hydraulic system, effect is the hydraulic oil of filter pump output, and the pollutant in hydraulic oil is intercepted, and is hydraulic
Element provides clean hydraulic oil, avoids abrasion, the clamping stagnation of the Hydraulic Elements such as valve, motor, guarantees the normal work of Hydraulic Elements,
Increase the service life of Hydraulic Elements.
With the increase of the amount of pollutants of interception, the resistance that hydraulic oil flows through filter core be will increase for filter core in filter,
I.e. the inside and outside differential pressure of filter core increases, can be equipped with bypass in filter in order to guarantee that filter core is not subject to crushing and causes more to pollute
Valve.After the inside and outside differential pressure of filter core reaches a certain level, by-passing valve is opened, and a part of hydraulic oil flows away from by-passing valve, this part
Hydraulic oil is no longer pass through the filtering of filter core, and filter core blocking is more serious, and the hydraulic oil to flow away from by-passing valve is more, with filtered liquid
Pressure oil mixing, enters hydraulic system together.Contain pollutant in the hydraulic oil of bypass, it can be caused after entering Hydraulic Elements
The harm such as abrasion, clamping stagnation, the harm that accurate hydraulic part is subject to are bigger.
The inside and outside differential pressure of filter core also suffers from the influence of hydraulic oil viscosity, and oil temperature is lower, and the viscosity of hydraulic oil is bigger, filter core
Pressure difference is bigger.Therefore, when equipment just starts, hydraulic fluid temperature is lower, and the pressure difference of filter core is larger, with operation hours
Increase, hydraulic fluid temperature gradually increases, and the pressure difference of filter core can be with gradually decreasing.At low ambient temperatures, if
When standby just starting, the pressure difference of filter core is more than the cracking pressure of by-passing valve, and hydraulic oil will be bypassed, be damaged to hydraulic part.
Generally alarm is also will be installed on filter, after the pressure difference of filter core reaches alarm pressure, alarm issues letter
Number, the controller of equipment is usually sent a signal to, signal is shown that over the display, user is known that filter core by controller
Pressure difference it is too big, hydraulic oil will or bypass, and user is according to the filter core in this sighal replacement filter.Due to filter core pressure difference
Be affected by temperature it is larger, even if filter core blocking arrive replacement degree, when oil temperature is low, alarm may also be will call the police, use
The replacement filter core information inaccuracy that family receives.There is also users to replace filter core receiving filter alarm signal not in time
The case where, lead to the hydraulic oil pollution hydraulic part of bypass, hydraulic system serious wear or failure.
Utility model content
Hydraulic filtering system is polluted without bypass the purpose of this utility model is to provide a kind of, solves mistake in the prior art
Filter bypasses the problem of hydraulic oil pollution hydraulic system.
It is described in the utility model to pollute hydraulic filtering system, including pump and hydraulic system, hydraulic filtering system without bypass
Between pump and hydraulic system, hydraulic filtering system includes being sequentially connected the main filter connect, auxiliary filter and reversal valve,
Middle main filter connection pump, reversal valve connect hydraulic system, and main filter and auxiliary filter include filter core, by-passing valve and pressure difference
Alarm, main filter connect hydraulic system with the filter core of auxiliary filter, and the by-passing valve in main filter connects auxiliary filter
Filter core, pressure difference alarm are connected to the both ends of filter core in main filter and auxiliary filter.
Filter core plays a part of to filter hydraulic oil；Bypass valve action is to allow part oil liquid to flow away from it in filter core blocking, is prevented
Only filter core is crushed；In oil liquid bypass, pressure difference alarm can issue alarm signal, the control for controller.
The outside of the reversal valve is also connected with coarse filter, and coarse filter connects hydraulic system.
The main filter includes main filter core, main by-passing valve and main pressure difference alarm, and auxiliary filter includes auxiliary filter core, auxiliary
By-passing valve and auxiliary pressure difference alarm, wherein main by-passing valve connects auxiliary filter core, auxiliary by-passing valve connects reversal valve, main filter core and auxiliary filter core
Hydraulic system is connected, main pressure difference alarm and auxiliary pressure difference alarm are connected to the both ends of main filter core and auxiliary filter core, main pressure difference
Alarm and auxiliary pressure difference alarm are connected with device controller.
The hydraulic system is externally connected to pressure sensor, and pressure sensor connects device controller.
Oil temperature detection sensor is equipped in the hydraulic system, oil temperature detection sensor connects device controller.
The hydraulic oil for pumping output enters hydraulic system after the main filter element filtering in main filter；From bypass in main filter
The hydraulic oil of valve bypass not directly enters hydraulic system, but enters auxiliary filter, after the auxiliary filter element filtering in auxiliary filter
Into hydraulic system；If the hydraulic oil into auxiliary filter is excessive, auxiliary by-passing valve bypasses again in auxiliary filter hydraulic oil stream
To reversal valve, in reversal valve no power, hydraulic oil flows into hydraulic system and requires low position (such as bull-dozer to cleannes
Torque-converters in) or direct oil return box, when reversal valve is powered, hydraulic oil is flowed into coarse filter, after the filtering of coarse filter
Into hydraulic system.
When main filter core chocking-up degree after equipment operation a period of time, oil temperature are high, and in main filter is lighter, whole liquid
Pressure oil enters hydraulic system after the filtering of main filter core.This is normal operating conditions, and equipment most of working time is in this
State.
When equipment has just started, oil temperature is low or main filter core blocks to a certain extent, hydraulic oil warp is had in main filter
Main by-passing valve is bypassed to auxiliary filter, and hydraulic system is entered after auxiliary filter element filtering.This working condition can solve conventional liquid
In pressure system, when hydraulic oil oil temperature is low and when filter core is blocked to a certain degree, without the bypass hydraulic oil pollution hydraulic pressure system of filtering
System problem.Equipment has just started that need replacing with filter core blocking be state in short-term, and the auxiliary filter core working time is short, and the service life is longer than main filter core
It is more.
When equipment has just started, oil temperature is low or the blocking of main filter core is serious, and auxiliary filter core is also blocked to a certain degree, main mistake
The oil liquid that filter is bypassed to auxiliary filter is more, and auxiliary filter core pressure difference is larger, and section hydraulic oil is bypassed to reversal valve through auxiliary by-passing valve,
In reversal valve no power, hydraulic oil flows out in hydraulic system and requires low position or direct oil return box to cleannes,
When this part oil liquid is not excessive, when the system pressure that pressure sensor detects is enough, filter core can be continued to use, and be increased
The service life of filter core；If when the system pressure deficiency that pressure sensor detects, needing user to replace filter core, and carry out hot vehicle, such as
Fruit user needs forced working, can be powered to reversal valve, and the hydraulic oil to reversal valve flows out to coarse filter, through thick mistake
System is entered back into after filter filtering, such situation can only short-term operation.
The utility model compared with prior art, has the following beneficial effects:
(1) it can solve in hydraulic oil oil temperature low (equipment has just started) or filter core blocking, bypass hydraulic oil without filtering
The problem of being directly entered hydraulic system, polluting hydraulic system；
(2) when can solve user and replacing filter core not in time, hydraulic oil pollution hydraulic system problem is bypassed without filtering；
(3) can solve filter can all alarm in several cases, replace filter core to user and indicate indefinite problem；
(4) performance that can give full play to filter core, increases the service life of filter core.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model embodiment；
Fig. 2 is the circuit diagram of the utility model embodiment；
In figure: 1, main filter；2, auxiliary filter；3, reversal valve；4, coarse filter；5, pressure sensor；6, it pumps；7, liquid
Pressure system；11, main by-passing valve；12, main filter core；13, main pressure difference alarm；21, auxiliary filter core；22, auxiliary by-passing valve；23, auxiliary pressure difference
Alarm.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples:
Embodiment 1:
As shown in Figs. 1-2, described in the utility model to pollute hydraulic filtering system, including pump 6 and hydraulic system without bypass
7, hydraulic filtering system is located between pump 6 and hydraulic system 7, and hydraulic filtering system includes being sequentially connected the main filter 1 connect, auxiliary
Filter 2 and reversal valve 3, wherein the connection of main filter 1 pumps 6, and reversal valve 3 connects hydraulic system 7, main filter 1 and auxiliary filtering
Device 2 includes filter core, by-passing valve and pressure difference alarm, and main filter 1 connects hydraulic system 7, main mistake with the filter core of auxiliary filter 2
By-passing valve in filter 1 connects the filter core of auxiliary filter 2, and pressure difference alarm is connected in main filter 1 and auxiliary filter 2
The both ends of filter core.
In order to further illustrate above-described embodiment, the outside of reversal valve 3 is also connected with coarse filter 4, and coarse filter 4 connects
Hydraulic system 7.
In order to further illustrate above-described embodiment, main filter 1 includes main filter core 12, main by-passing valve 11 and the alarm of main pressure difference
Device 13, auxiliary filter 2 includes auxiliary filter core 21, auxiliary by-passing valve 22 and auxiliary pressure difference alarm 23, wherein main by-passing valve 11 connects auxiliary filter
Core 21, auxiliary by-passing valve 22 connect reversal valve 3, and main filter core 12 and auxiliary filter core 21 connect hydraulic system 7, main pressure difference alarm 13 and auxiliary
Pressure difference alarm 23 is connected to the both ends of main filter core 12 and auxiliary filter core 21, main pressure difference alarm 13 and auxiliary pressure difference alarm 23
It is connected with device controller.
In order to further illustrate above-described embodiment, hydraulic system 7 is externally connected to pressure sensor 5, pressure sensor 5
Connect device controller.
In order to further illustrate above-described embodiment, oil temperature detection sensor, oil temperature detection sensor are equipped in hydraulic system 7
Connect device controller.
The working principle of the present embodiment are as follows: the hydraulic oil that pump 6 comes enters main filter 1, by the filtering of main filter core 12
Into hydraulic system 7, if the pressure difference of main filter core 12 is more than the cracking pressure of main by-passing valve 11, section hydraulic oil passes through main bypass
Valve 11 flows away, and main pressure difference alarm 13 can issue alarm signal to device controller at this time.
Enter auxiliary filter 2 by the hydraulic oil that main by-passing valve 11 flows away, enters after the filtering of auxiliary filter core 21 hydraulic
System 7, if the pressure difference of auxiliary filter core 21 is more than the cracking pressure of auxiliary by-passing valve 22, section hydraulic oil is flowed by auxiliary by-passing valve 22
It walks, auxiliary pressure difference alarm 23 can issue alarm signal to device controller at this time.
Enter reversal valve 3 by the hydraulic oil that auxiliary by-passing valve 22 flows away, in 3 no power of reversal valve, reversal valve 3 is in upper
Position, into reversal valve 3 hydraulic oil flow out to hydraulic system 7 cleannes are required with low position, such as the bending moment of bull-dozer
In device or direct oil return box；When reversal valve 3 is powered, reversal valve 3 is in bottom, and the hydraulic oil into reversal valve 3 flows out to
Coarse filter 4, using after the filtering of coarse filter 4 enter hydraulic system 7.
Pressure sensor 5 can detect the pressure of hydraulic system 7, the control for device controller the moment.
Working condition provided by the utility model without bypass pollution hydraulic filtering system can be divided into following 4 kinds:
(1) when hydraulic oil oil temperature is higher, main 12 chocking-up degree of filter core is lighter, the hydraulic oil that pump 6 comes is all by leading
Enter hydraulic system 7 after the filtering of filter core 12, is flowed through in auxiliary filter 2 without hydraulic oil, be at this time normal operating conditions, and set
The standby major part working time is in this state.
(2) low or main filter core 12 blocks seriously in hydraulic oil oil temperature, and when auxiliary filter core 21 does not block, the pressure difference of main filter core 12
More than the cracking pressure of main by-passing valve 11, section hydraulic oil flows away by main by-passing valve 11, and enters auxiliary filter 2, and process is auxiliary
Enter hydraulic system 7 after the filtering of filter core 21, auxiliary by-passing valve 22 is not turned on, flows through in reversal valve 3 without oil liquid.This working condition
Lower main pressure difference alarm 13 can issue alarm, be state in short-term within the working time of equipment.This working condition can solve
Equipment just risen vehicle oil temperature it is lower when, the problem of from hydraulic oil pollution hydraulic system 7 of the filter bypass without filtering；It can be with
When solution user replaces the filter core blocked not in time, from the hydraulic oil pollution hydraulic system 7 without filtering of filter bypass
The problem of.
(3) low or main filter core 12 blocks seriously in hydraulic oil oil temperature, and when auxiliary filter core 21 is also blocked to a certain degree, main filtering
The hydraulic oil that main by-passing valve 11 in device 1 bypasses enters auxiliary filter 2, and since auxiliary filter core 21 also blocks, section hydraulic oil is from auxiliary
By-passing valve 22 flows away, and enters reversal valve 3.In 3 no power of reversal valve, reversal valve 3 is in upper, into the liquid of reversal valve 3
What pressure oil flowed out to hydraulic system 7 requires cleannes low position, such as in the torque-converters of bull-dozer or direct oil return
Case.Such case all blocks for two filter cores or hydraulic oil oil temperature very low state, enough in the pressure that pressure sensor 5 detects
When, equipment still can work, and increase the service life of filter core.
(4) under the same working condition of situation above (3), if pressure sensor 5 detect insufficient pressure when,
Hydraulic shortage of oil in hydraulic system 7, equipment cannot work again, remind user to replace filter core and the hot vehicle of idling, if at equipment
It in the working environment that cannot be shut down, can power to reversal valve 3, reversal valve 3 is in bottom, and the oil liquid into reversal valve 3 flows out
To coarse filter 4, enter hydraulic system 7 after the filtering of coarse filter 4, ensure that system pressure abundance.This state is the state of emergency,
Equipment will be shut down after reaching safety place, and replace filter core.
Hydraulic filtering system is polluted without bypass using the embodiments of the present invention being described in conjunction with the accompanying above, is solved
In the prior art the problem of filter bypass hydraulic oil pollution hydraulic system.But the utility model is not limited to described reality
Mode is applied, these carry out embodiment in the case where not departing from the principles of the present invention and spirit variation is modified, replaced
It changes and deformation is still fallen in the protection scope of the utility model.
Claims (5)
1. a kind of pollute hydraulic filtering system, including pump (6) and hydraulic system (7) without bypass, hydraulic filtering system is located at pump (6)
Between hydraulic system (7), it is characterised in that: the hydraulic filtering system includes being sequentially connected the main filter (1) connect, auxiliary
Filter (2) and reversal valve (3), wherein main filter (1) connection pump (6), reversal valve (3) connect hydraulic system (7), main filtering
Device (1) and auxiliary filter (2) include filter core, by-passing valve and pressure difference alarm, the filter of main filter (1) and auxiliary filter (2)
Core connects hydraulic system (7), and the by-passing valve in main filter (1) connects the filter core of auxiliary filter (2), and pressure difference alarm connects respectively
Connect the both ends of the filter core in main filter (1) and auxiliary filter (2).
2. according to claim 1 pollute hydraulic filtering system without bypass, it is characterised in that: the reversal valve (3)
Outside is also connected with coarse filter (4), and coarse filter (4) connects hydraulic system (7).
3. according to claim 1 pollute hydraulic filtering system without bypass, it is characterised in that: the main filter (1)
Including main filter core (12), main by-passing valve (11) and main pressure difference alarm (13), auxiliary filter (2) includes auxiliary filter core (21), auxiliary side
Port valve (22) and auxiliary pressure difference alarm (23), wherein main by-passing valve (11) connects auxiliary filter core (21), auxiliary by-passing valve (22) connection is changed
To valve (3), main filter core (12) and auxiliary filter core (21) connection hydraulic system (7), main pressure difference alarm (13) and auxiliary pressure difference alarm
(23) both ends of main filter core (12) and auxiliary filter core (21), main pressure difference alarm (13) and auxiliary pressure difference alarm (23) are connected to
It is connected with device controller.
4. according to claim 3 pollute hydraulic filtering system without bypass, it is characterised in that: the hydraulic system (7)
Be externally connected to pressure sensor (5), pressure sensor (5) connect device controller.
5. according to claim 3 or 4 pollute hydraulic filtering system without bypass, it is characterised in that: the hydraulic system
(7) oil temperature detection sensor is equipped in, oil temperature detection sensor connects device controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920156751.0U CN209469649U (en) | 2019-01-29 | 2019-01-29 | Hydraulic filtering system is polluted without bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920156751.0U CN209469649U (en) | 2019-01-29 | 2019-01-29 | Hydraulic filtering system is polluted without bypass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209469649U true CN209469649U (en) | 2019-10-08 |
Family
ID=68094338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920156751.0U Active CN209469649U (en) | 2019-01-29 | 2019-01-29 | Hydraulic filtering system is polluted without bypass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209469649U (en) |
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2019
- 2019-01-29 CN CN201920156751.0U patent/CN209469649U/en active Active
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