CN209687843U - Hydraulic oil-returning filtration system and two-wheel flute milling machine - Google Patents
Hydraulic oil-returning filtration system and two-wheel flute milling machine Download PDFInfo
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- CN209687843U CN209687843U CN201920127999.4U CN201920127999U CN209687843U CN 209687843 U CN209687843 U CN 209687843U CN 201920127999 U CN201920127999 U CN 201920127999U CN 209687843 U CN209687843 U CN 209687843U
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Abstract
The utility model relates to a kind of hydraulic oil-returning filtration system and two-wheel flute milling machines.Wherein, hydraulic oil-returning filtration system includes: oil return line, for the hydraulic oil in hydraulic system to be led back fuel tank；First filter is set to the oil return line, for filtering mixed granule foreign in the hydraulic oil in the oil return line；And second filter, it is set to the oil return line, for filtering mixed water in the hydraulic oil in the oil return line.The combination of first filter and the second filter in the utility model oil return line, for filtering out mixed particulate pollutant and moisture in the hydraulic oil in oil return line, to guarantee the cleannes of hydraulic oil, hydraulic system pollution is avoided, time and cost needed for reducing maintenance.
Description
Technical field
The utility model relates to engineering machinery field more particularly to a kind of hydraulic oil-returning filtration system and two-wheel flute milling machines.
Background technique
Two-wheel flute milling machine is construction of diaphragm wall equipment.When milling rock, it is broken to generate a large amount of rocks in slot for milling wheel
Bits, clast and soil, water are mixed to form mud, and slush pump is by bottom slurry transportation at surface mud screening filter device
Reason.
Due to driving milling wheel and slush pump hydraulic motor, for correction correction oil cylinder and conveying hydraulic oil it is hydraulic
Sebific duct all works in slurry environment, and mud is possible to enter hydraulic oil because of abrasion or aging in the hydralic hose course of work
And entire hydraulic system is polluted, hydraulic system pollution will cause Hydraulic Elements damage, functional fault, or even safety accident occurs.
Since mud pressure is less than hydraulic oil inlet pipe pressure and is greater than oil return pipe pressure, usual mud, which penetrates into, to be occurred hydraulic
On oil return line.
Utility model content
One of purpose of the utility model is to propose a kind of hydraulic oil-returning filtration system and two-wheel flute milling machine, for delaying
The problem of being mixed into impurity in solution hydraulic oil-returning.
Some embodiments provide a kind of hydraulic oil-returning filtration systems comprising:
Oil return line, for the hydraulic oil in hydraulic system to be led back fuel tank；
First filter is set to the oil return line, for filtering in the hydraulic oil in the oil return line mixed
Grain impurity；And
Second filter is set to the oil return line, for filtering mixed water in the hydraulic oil in the oil return line.
In some embodiments, the first filter and second filter series connection are set to the oil return line.
In some embodiments, the first filter includes:
First filter core, for filtering mixed granule foreign in the hydraulic oil in the oil return line；And
First differential pressure transmitter device is connected to the input terminal and output end of first filter core, for according to first filter
The input terminal of core and the pressure difference size of output end, judge whether first filter core blocks, and issue jam signal.
In some embodiments, the first filter includes the first by-passing valve, is connected in parallel with first filter core, is used
It is opened in first filter core blocking, so that the hydraulic oil in the oil return line flows to institute by first by-passing valve
State fuel tank.
In some embodiments, hydraulic oil-returning filtration system includes controller, is electrically connected first differential pressure transmitter device, is used
In the jam signal for receiving the first differential pressure transmitter device sending, and for cutting off the oil of the partial act in the hydraulic system
Road.
In some embodiments, hydraulic oil-returning filtration system includes temperature sensor, is set to the oil return line, electrical connection
The controller, the temperature sensor are used to detect the temperature of hydraulic oil in the oil return line, and to the controller
Send temperature signal；The controller is used to receive the jam signal of the first differential pressure transmitter device sending, and receives
Temperature signal not less than in the case where setting value, cut off the partial act oil circuit in the hydraulic system.
In some embodiments, second filter includes:
Second filter core, for filtering mixed water in the hydraulic oil in the oil return line；And
Second differential pressure transmitter device is connected to the input terminal and output end of second filter core, for according to second filter
The input terminal of core and the pressure difference size of output end, judge whether second filter core blocks, and issue jam signal.
In some embodiments, second filter includes the second by-passing valve, is connected in parallel with second filter core, is used
It is opened in second filter core blocking, so that the hydraulic oil in the oil return line flows to institute by second by-passing valve
State fuel tank.
In some embodiments, hydraulic oil-returning filtration system includes controller, is electrically connected second differential pressure transmitter device, is used
In the jam signal for receiving the second differential pressure transmitter device sending, and for cutting off the oil of the partial act in the hydraulic system
Road.
In some embodiments, hydraulic oil-returning filtration system includes temperature sensor, is set to the oil return line, electrical connection
The controller, the temperature sensor are used to detect the temperature of hydraulic oil in the oil return line, and to the controller
Send temperature signal；The controller is used to receive the jam signal of the second differential pressure transmitter device sending, and receives
Temperature signal not less than in the case where setting value, cut off the partial act oil circuit in the hydraulic system.
Some embodiments provide a kind of two-wheel flute milling machines comprising hydraulic system, fuel tank and such as above-mentioned hydraulic oil-returning
Filtration system.
In some embodiments, two-wheel flute milling machine includes controller, for controlling the partial act in the hydraulic system
The on-off of oil circuit.
Based on the above-mentioned technical proposal, the utility model at least has the advantages that
In some embodiments, in oil return line first filter and the second filter combination, for filtering out oil return
Mixed particulate pollutant and moisture in hydraulic oil in pipeline avoid hydraulic system pollution to guarantee the cleannes of hydraulic oil,
Time and cost needed for reducing maintenance.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is the schematic illustration for the hydraulic oil-returning filtration system that some embodiments of the utility model provide.
Numbering in the drawing explanation:
1- oil return line；
2- first filter；The first filter core of 21-；The first differential pressure transmitter device of 22-；The first by-passing valve of 23-；
The second filter of 3-；The second filter core of 31-；The second differential pressure transmitter device of 32-；The second by-passing valve of 33-；
4- controller；
5- temperature sensor；
6- hydraulic system；
7- fuel tank；
8- hydraulic pump.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, the technical solution in embodiment is carried out it is clear, complete
Ground description.Obviously, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.
Based on the embodiments of the present invention, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this is practical
The limitation of novel protected range.
As shown in Figure 1, the schematic diagram of the hydraulic oil-returning filtration system provided for some embodiments.
In some embodiments, hydraulic oil-returning filtration system includes oil return line 1, and oil return line 1 is used for hydraulic system 6
In hydraulic oil lead back fuel tank 7.
In some embodiments, hydraulic oil-returning filtration system includes first filter 2, oil return line 1 is set to, for filtering
Mixed granule foreign in hydraulic oil in oil return line 1.
In some embodiments, hydraulic oil-returning filtration system includes the second filter 3, oil return line 1 is set to, for filtering
Mixed water in hydraulic oil in oil return line 1.
In some embodiments, first filter 2 is combined with the second filter 3, mixed in hydraulic oil for filtering out
Particulate pollutant and moisture avoid hydraulic system pollution to guarantee the cleannes of hydraulic oil, the time needed for reducing maintenance and at
This.
In some embodiments, first filter 2 and the series connection of the second filter 3 are set to oil return line 1.Optionally, edge is returned
The flow direction of hydraulic oil in oil pipe line 1, first filter 2 are set to the upstream of the second filter 3.
In some embodiments, first filter 2 includes the first filter core 21, and the first filter core 21 is for filtering oil return line 1
Mixed granule foreign in interior hydraulic oil.Optionally, the first filter core 21 includes removing particle filtering filter core.
In some embodiments, first filter 2 includes the first differential pressure transmitter device 22.First differential pressure transmitter device 22 is connected to
The input terminal and output end of first filter core 21, for sentencing according to the input terminal of the first filter core 21 and the pressure difference size of output end
Whether disconnected first filter core 21 blocks, and in the case where the blocking of the first filter core 21, issues jam signal, dirty to occur in hydraulic oil
When dye can and alarm, prompt operator check and overhaul, reduce property loss.
In some embodiments, first filter 2 includes the first by-passing valve 23.First by-passing valve 23 and the first filter core 21 are simultaneously
Connection connection, for being opened in the blocking of the first filter core 21, so that the hydraulic oil in oil return line 1 is flowed to by the first by-passing valve 23
Fuel tank 7.
In some embodiments, first filter 2 includes the first pipeline and the second pipeline in parallel, and the first filter core 21 is set to
First pipeline, the first by-passing valve 23 are set to the second pipeline.Liquid in the unplugged situation of the first filter core 21, in oil return line 1
Pressure oil enters the first pipeline, after filtering by the first filter core 21, flows out first filter 2.The case where the first filter core 21 blocks
Under, the first by-passing valve 23 is opened, and the hydraulic oil in oil return line 1 flows out first filter 2 by the second pipeline.
In some embodiments, hydraulic oil-returning filtration system includes controller 4.Controller 4 is electrically connected the first differential pressure signaling
Device 22, the jam signal that the first filter core of expression 21 for receiving the sending of the first differential pressure transmitter device 22 blocks.And controller 4 is used for
In the jam signal that the first filter core of expression 21 for receiving the sending of the first differential pressure transmitter device 22 blocks, the hydraulic system is cut off
Partial act oil circuit in 6.
In some implementations, the first by-passing valve 23 is configured to the pressure difference of input terminal and output end in the first filter core 21
Size automatically opens after reaching pressure differential resetting value.
In some implementations, the pressure differential resetting value of the first by-passing valve 23 is omited than the pressure differential resetting value of the first differential pressure transmitter device 22
Greatly.Such as: the pressure difference at 21 both ends of the first filter core reaches 2bar, and the first differential pressure transmitter device 22 issues jam signal, when the first filter core
When the pressure difference at 21 both ends continues to increase to 3bar, the first by-passing valve 23 is automatically opened, and the hydraulic oil in oil return line 1 passes through second
Pipeline flows out first filter 2.
Certainly, controller 4 can also be electrically connected the first by-passing valve 23, receive the first differential pressure transmitter device 22 hair in controller 4
When the signal that the first filter core of expression 21 out blocks, the first by-passing valve 23 of control is opened.
In some embodiments, hydraulic oil-returning filtration system includes temperature sensor 5.Temperature sensor 5 is set to oil return pipe
Road 1, and it is electrically connected controller 4.Temperature sensor 5 is used to detect the temperature of hydraulic oil in oil return line 1, and to controller 4
Send temperature signal.Controller 4 is used to receive the jam signal of the first differential pressure transmitter device 22 sending, and receives temperature biography
For the temperature signal that sensor 5 issues not less than in the case where desired temperature, output signal cuts off the part working oil of hydraulic system 6
Road, and alarm to the blocking that operator issues the first filter core 21, remind replacement filter core in time.
When pressure difference value at 21 both ends of the first filter core reaches the set pressure differential value of the first by-passing valve 23, the first by-passing valve
23 open, and the hydraulic oil in oil return line 1 flows out first filter 2 by the second pipeline.
Controller 4 is used to receive the jam signal of the first differential pressure transmitter device 22 sending, and receives temperature sensor 5
In the case that the temperature signal of sending is lower than desired temperature, the case where being judged as false alarm caused by the temperature of hydraulic oil is low,
The working oil path of hydraulic system 6 will not be cut off, keeps hydraulic system 6 to work normally, for preventing the wrong report of first filter 2
It is alert, the service life of the first filter core 21 is extended, maintenance cost is reduced.
In some embodiments, when equipment just starts, the hydraulic fluid temperature in hydraulic system 6 is lower, and viscosity is larger, leads to
The front and back pressure difference of first filter core 21 is larger when crossing first filter 2, and the first differential pressure transmitter device 22 issues blocking alarm signal to control
Device 4 processed.Meanwhile temperature signal is also transmitted to controller 4 in real time by temperature sensor 5, controller 4 receives blocking alarm signal
It is made the following judgment with after temperature signal according to internal preset program:
The temperature signal that controller 4 receives the alarm signal of the sending of first filter 2 and temperature sensor 5 issues, and
Temperature signal shows that the oil temperature of hydraulic oil is greater than or equal to temperature difference setting value, such as: 45 DEG C, the output control signal of controller 4 is cut
The working oil path of disconnected hydraulic system 6；The alarm signal and temperature sensor 5 of the sending of first filter 2 are received in controller 4
The temperature signal of sending, and temperature signal shows that the oil temperature of hydraulic oil is lower than desired temperature, such as: 45 DEG C, control is not exported
Signal, hydraulic system 6 work on, and prevent false alarm.
When rigid starting device, the temperature of hydraulic oil is low, and the first differential pressure transmitter device 22 can issue alarm signal, but be at this time
The front and back pressure difference of the first filter core 21 is caused to increase since hydraulic oil viscosity is low, not filter core blocks, and is false alarm, such as according to the report
Alert signal will cause filter core waste to replace filter core, and maintenance cost increases, and therefore, the disclosure also has and prevents false alarm
Effect.
In some embodiments, after the first by-passing valve 23 is opened, the second filtering is entered by the hydraulic oil of first filter 2
Device 3, by the second further filtering of filter 3, to prevent the hydraulic oil for being mixed into pollutant to be directly entered fuel tank 7.
In some embodiments, the second filter 3 includes the second filter core 31, and the second filter core 31 is for filtering oil return line 1
Mixed water in interior hydraulic oil.
Optionally, the second filter core 31 includes water suction filter core.
In some embodiments, the second filter 3 includes the second differential pressure transmitter device 32, and the second differential pressure transmitter device 32 is connected to
The input terminal and output end of second filter core 31, for sentencing according to the input terminal of the second filter core 31 and the pressure difference size of output end
Whether disconnected second filter core 31 blocks, and in the case where the blocking of the second filter core 31, issues jam signal, dirty to occur in hydraulic oil
When dye can and alarm, prompt operator check and overhaul, reduce property loss.
In some embodiments, the second filter 3 includes the second by-passing valve 33, and the second by-passing valve 33 and the second filter core 31 are simultaneously
Connection connection, for being opened in the blocking of the second filter core 31, so that the hydraulic oil in oil return line 1 is flowed to by the second by-passing valve 33
Fuel tank 7.
In some embodiments, the second filter 3 includes third pipeline and the 4th pipeline in parallel, and the second filter core 31 is set to
Third pipeline, the second by-passing valve 33 is in the 4th pipeline.It is hydraulic in oil return line 1 in the unplugged situation of the second filter core 31
Oil enters third pipeline, after filtering by the second filter core 31, flows out the second filter 3.In the case where the blocking of the second filter core 31,
Second by-passing valve 33 is opened, and the hydraulic oil in oil return line 1 flows out the second filter 3 by the 4th pipeline.
In some embodiments, hydraulic oil-returning filtration system includes controller 4, and controller 4 is electrically connected the second differential pressure signaling
Device 32, the jam signal that the second filter core of expression 31 for receiving the sending of the second differential pressure transmitter device 32 blocks, and for receiving
When the jam signal that the second filter core of expression 31 issued to the second differential pressure transmitter device 32 blocks, the part work of hydraulic system 6 is cut off
Make oil circuit.
In some implementations, the pressure differential resetting value of the second by-passing valve 33 is omited than the pressure differential resetting value of the second differential pressure transmitter device 32
Greatly.Such as: the pressure difference at 31 both ends of the second filter core reaches 2bar, and the second differential pressure transmitter device 32 issues jam signal, when the second filter core
When the pressure difference at 31 both ends continues to increase to 3bar, the second by-passing valve 33 is automatically opened, and the hydraulic oil in oil return line 1 passes through the 4th
Pipeline flows out the second filter 3.
Certainly, controller 4 can also be electrically connected the second by-passing valve 33, indicate for issuing in the second differential pressure transmitter device 32
When the jam signal of two filter cores 31 blocking, the second by-passing valve 33 of control is opened.
In some embodiments, hydraulic oil-returning filtration system includes temperature sensor 5, and temperature sensor 5 is set to oil return pipe
Road 1 is electrically connected controller 4, and temperature sensor 5 is used to detect the temperature of the hydraulic oil in oil return line 1, and sends out to controller 4
Send temperature signal；Controller 4 is used to receive the jam signal of the second differential pressure transmitter device 32 sending, and receives temperature sensing
The temperature signal that device 5 issues cuts off the part working oil path of hydraulic system 6 not less than in the case where desired temperature.
Controller 4 is used to receive the jam signal of the second differential pressure transmitter device 32 sending, and receives temperature sensor 5
In the case that the temperature signal of sending is lower than desired temperature, the case where being judged as false alarm caused by the oil temperature of hydraulic oil is low,
The working oil path of hydraulic system 6 will not be cut off, keeps hydraulic system 6 to work normally, for preventing the wrong report of the second filter 3
It is alert, extend the service life of the second filter core 31, reduces maintenance cost.
In some embodiments, when equipment just starts, the hydraulic fluid temperature of hydraulic system 6 is lower, and viscosity is larger, passes through
The front and back pressure difference of second filter core 31 is larger when the second filter 3, and the second differential pressure transmitter device 32 issues blocking alarm signal to control
Device 4.Meanwhile temperature signal is also transmitted to controller 4 in real time by temperature sensor 5, controller 4 receive blocking alarm signal and
It is made the following judgment after temperature signal according to internal preset program:
Controller 4 receives the blocking alarm signal and temperature that the second filter core of expression 31 of the second filter 3 sending blocks
The temperature signal that sensor 5 issues, and temperature signal indicates that the oil temperature of hydraulic oil is greater than or equal to desired temperature, such as: 45
DEG C, the part working oil path of output control signal cut hydraulic system 6；Controller 4 receives the expression the of the second filter 3 sending
The temperature signal that the blocking alarm signal and temperature sensor 5 of two filter cores 31 blocking issue, and temperature signal indicates hydraulic oil
Oil temperature be lower than desired temperature, such as: 45 DEG C, do not export control signal, hydraulic system 6 continues to keep work, prevents from reporting by mistake
It is alert.
When rigid starting device, the temperature of hydraulic oil is low, and the second differential pressure transmitter device 32 can issue alarm signal, but be at this time
The front and back pressure difference of the second filter core 31 is caused to increase since hydraulic oil viscosity is low, not filter core blocks, and is false alarm, such as according to the report
Alert signal will cause filter core waste to replace filter core, and maintenance cost increases.Therefore, the disclosure, which also has, prevents false alarm
Effect.
In some embodiments, first filter 2 and the second filter 3, and the first filtering are arranged in series in oil return line 1
Device 2 is set to the upstream of the second filter 3, and the hydraulic oil in oil return line 1 is introduced into first filter 2 and carries out first time filtering,
Most of granule foreign is filtered out by the first filter core 21 in hydraulic oil.Optionally, filtration ratio β >=1000 of the first filter core 21, i.e.,
Before filtering and filtered impurities amounts of particles ratio is more than or equal to 1000.
The moisture ability in filter element filtering hydraulic oil due to removing particle is very low, is filtered by first filter 2 hydraulic
Granule foreign is largely removed in oil, but still has most moisture to pass through first filter 2, therefore, the first mistake in hydraulic oil
The downstream of filter 2 is equipped with the second filter 3, and the second filter core 31 selects water imbibition filter core, when hydraulic oil flows through the second filter core 31, mistake
Filter remaining a small amount of particle impurity and remaining moisture.
The pollution that can effectively solve the emulsion reaction and solid particle of hydraulic oil by twice filtering, extends making for hydraulic oil
Use the service life.
In some embodiments, when pollutant increases suddenly, first filter 2 blocks 23 horse back of the first by-passing valve after alarm
Be opened, hydraulic oil flows through first filter 2 by the first by-passing valve 23, subsequent second filter 3 remain to play stop it is miscellaneous
Matter enters the effect of hydraulic oil container, the serious consequence generated after avoiding hydraulic oil container from polluting.
Controller in above-mentioned each embodiment is same controller.
Some embodiments provide a kind of two-wheel flute milling machines comprising hydraulic system 6, fuel tank 7 and above-mentioned hydraulic oil-returning
Filtration system.
In some embodiments, two-wheel flute milling machine includes controller 4, for controlling the part working oil in hydraulic system 6
The on-off on road.
Controller in above-mentioned each embodiment is same controller.The controller and hydraulic oil-returning of two-wheel flute milling machine filter
The controller of system is same controller.
In some embodiments, filter is in conjunction with differential pressure transmitter device, when work before differential pressure transmitter device monitors filter core
Alarm signal can be issued to controller when pressure difference is more than setting value afterwards, and controller receives signal and sends control signals to hydraulic pressure system
System automatically cuts off equipment hydraulic circuit, prevents from polluting further diffusion；Controller sends operation for alarm signal simultaneously
Room prompts filter core blocking, and operator stops operation after receiving prompting message and checks filter, is confirmed whether to have mud contamination simultaneously
Replace filter core.When solving blocking sending alarm signal, operator cuts off the oil circuit of equipment not in time, and by-passing valve is opened,
Contaminated hydraulic oil can be directly entered the problem of hydraulic oil container makes hydraulic system break down quickly.
In some embodiments, two-wheel flute milling machine includes hydraulic pump 8, and hydraulic pump 8 drives the hydraulic oil in fuel tank 7 to enter liquid
Pressure system 6.
In some embodiments, the import of first filter 2 is connected to the oil return opening of hydraulic system 6, first filter 2
Outlet is connected to the entrance of the second filter 3, and the outlet of the second filter 3 is connected to fuel tank 7.
Sending alarm signal arrives after first differential pressure transmitter device 22 and/or the second differential pressure transmitter device 32 monitor plugged filter
Controller 4.Temperature sensor 5 is mounted on the entrance of first filter 2, and temperature sensor 5 issues temperature letter to controller 4
Number.Controller 4 receives the signal of the first differential pressure transmitter device 22 and/or the second differential pressure transmitter device 32 and the letter of temperature sensor 5
Number and output a control signal to hydraulic system 6, the start and stop work of control system.
The combination of disclosure first filter 2 and the second filter 3, substantially increases the cleannes of hydraulic oil, avoids oil
Case 7 pollutes caused by bypassing because of filter core, and has the function of automatically cutting off oil circuit, and hydraulic system is avoided further to pollute,
Reduce system failure degree, maintenance time and cost；Also have the function of to prevent low temperature false alarm, avoids hydraulic filter core too early more
Waste caused by changing, system reliability greatly improve.
Above-mentioned each embodiment is not limited to setting first filter 2 and the second filter 3, other mistakes can also be arranged certainly
Filter.
In the description of the present invention, it should be understood that being limited using the words such as " first ", " second ", " third "
Determine components, it is only for convenient for distinguishing to above-mentioned parts, there is no Stated otherwise such as, there is no special for above-mentioned word
Meaning, therefore should not be understood as the limitation to scope of protection of the utility model.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.In addition, it is clearly negate in the case where, the technical characteristic of one of embodiment can also valuably with its
He be combined with each other at one or more embodiments.
Claims (12)
1. a kind of hydraulic oil-returning filtration system characterized by comprising
Oil return line (1), for the hydraulic oil in hydraulic system (6) to be led back fuel tank (7)；
First filter (2) is set to the oil return line (1), is mixed into for filtering in the hydraulic oil in the oil return line (1)
Granule foreign；And
Second filter (3) is set to the oil return line (1), is mixed into for filtering in the hydraulic oil in the oil return line (1)
Water.
2. hydraulic oil-returning filtration system as described in claim 1, which is characterized in that the first filter (2) and described
Tow filtrator (3) series connection is set to the oil return line (1).
3. hydraulic oil-returning filtration system as described in claim 1, which is characterized in that the first filter (2) includes:
First filter core (21), for filtering mixed granule foreign in the hydraulic oil in the oil return line (1)；And
First differential pressure transmitter device (22) is connected to the input terminal and output end of first filter core (21), for according to described the
The input terminal of one filter core (21) and the pressure difference size of output end, judge whether first filter core (21) blocks, and issue stifled
Fill in signal.
4. hydraulic oil-returning filtration system as claimed in claim 3, which is characterized in that the first filter (2) includes first
By-passing valve (23) is connected in parallel with first filter core (21), for opening in first filter core (21) blocking, so that institute
The hydraulic oil stated in oil return line (1) flows to the fuel tank (7) by first by-passing valve (23).
5. hydraulic oil-returning filtration system as claimed in claim 3, which is characterized in that including controller (4), be electrically connected described the
One differential pressure transmitter device (22), the jam signal issued for receiving first differential pressure transmitter device (22), and it is described for cutting off
Partial act oil circuit in hydraulic system (6).
6. hydraulic oil-returning filtration system as claimed in claim 5, which is characterized in that including temperature sensor (5), be set to described
Oil return line (1) is electrically connected the controller (4), and the temperature sensor (5) is for detecting in the oil return line (1)
The temperature of hydraulic oil, and temperature signal is sent to the controller (4)；The controller (4) is for receiving described first
The jam signal that differential pressure transmitter device (22) issues, and the temperature signal received is not less than in the case where setting value, described in cutting
Partial act oil circuit in hydraulic system (6).
7. hydraulic oil-returning filtration system as described in claim 1, which is characterized in that second filter (3) includes:
Second filter core (31), for filtering mixed water in the hydraulic oil in the oil return line (1)；And
Second differential pressure transmitter device (32) is connected to the input terminal and output end of second filter core (31), for according to described the
The input terminal of two filter cores (31) and the pressure difference size of output end, judge whether second filter core (31) blocks, and issue stifled
Fill in signal.
8. hydraulic oil-returning filtration system as claimed in claim 7, which is characterized in that second filter (3) includes second
By-passing valve (33) is connected in parallel with second filter core (31), for opening in second filter core (31) blocking, so that institute
The hydraulic oil stated in oil return line (1) flows to the fuel tank (7) by second by-passing valve (33).
9. hydraulic oil-returning filtration system as claimed in claim 7, which is characterized in that including controller (4), be electrically connected described the
Two differential pressure transmitter devices (32), the jam signal issued for receiving second differential pressure transmitter device (32), and it is described for cutting off
Partial act oil circuit in hydraulic system (6).
10. hydraulic oil-returning filtration system as claimed in claim 9, which is characterized in that including temperature sensor (5), be set to institute
Oil return line (1) is stated, is electrically connected the controller (4), the temperature sensor (5) is for detecting in the oil return line (1)
Hydraulic oil temperature, and to the controller (4) send temperature signal；The controller (4) is used to receive described the
The jam signal that two differential pressure transmitter devices (32) issue, and the temperature signal received cuts off institute not less than in the case where setting value
State the partial act oil circuit in hydraulic system (6).
11. a kind of two-wheel flute milling machine, which is characterized in that including hydraulic system (6), fuel tank (7) and as claim 1~10 is any
Hydraulic oil-returning filtration system described in.
12. two-wheel flute milling machine as claimed in claim 11, which is characterized in that described hydraulic for controlling including controller (4)
The on-off of partial act oil circuit in system (6).
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| CN201920127999.4U CN209687843U (en) | 2019-01-24 | 2019-01-24 | Hydraulic oil-returning filtration system and two-wheel flute milling machine |
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| CN201920127999.4U CN209687843U (en) | 2019-01-24 | 2019-01-24 | Hydraulic oil-returning filtration system and two-wheel flute milling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538580A (en) * | 2019-01-24 | 2019-03-29 | 江苏徐工工程机械研究院有限公司 | Hydraulic oil-returning filtration system and two-wheel flute milling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538580A (en) * | 2019-01-24 | 2019-03-29 | 江苏徐工工程机械研究院有限公司 | Hydraulic oil-returning filtration system and two-wheel flute milling machine |
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