CN206655849U - Hydraulic motor drainage pressure control device - Google Patents
Hydraulic motor drainage pressure control device Download PDFInfo
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- CN206655849U CN206655849U CN201720240696.4U CN201720240696U CN206655849U CN 206655849 U CN206655849 U CN 206655849U CN 201720240696 U CN201720240696 U CN 201720240696U CN 206655849 U CN206655849 U CN 206655849U
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Abstract
It the utility model is related to a kind of hydraulic motor drainage pressure control device, including Fuel Tanking Unit (2) and oil-releasing mechanism, Fuel Tanking Unit (2) is provided with the hydraulic fluid port connected with the drain tap of hydraulic motor (1), and for storing the leakage fluid of hydraulic motor (1), oil-releasing mechanism connects with Fuel Tanking Unit (2), and will leak out fluid by oil-releasing mechanism when reaching preparatory condition with the oil pressure in Fuel Tanking Unit (2) discharges.Compared with the passive adaptation form that traditional use meets the sealing of hydraulic motor drainage pressure, control device of the present utility model has active control feature, by oil-releasing mechanism oil pressure in Fuel Tanking Unit can be maintained in tolerance zone, prevent draining high pressure from bringing damage to the shaft end seal of hydraulic motor, allow common outside framework oil seal normal use on hydraulic motor, avoid the installation that is brought using mechanical seal and change difficult and high Cost Problems, the scope of application is wider.
Description
Technical field
It the utility model is related to technical field of engineering machinery, more particularly to a kind of hydraulic motor drainage pressure control device.
Background technology
It is current in the prior art, for the shaft end seal of hydraulic motor, typically using common outside framework oil seal, and axle envelope
Service life influenceed by case drain pressure, the average pressure difference between shell and environmental pressure is 2bar, in normal work
At a temperature of will not persistently be higher than the value, instantaneous pressure peak value threshold limit value is 10bar, and the service life of axle envelope can be with pressure spike
The increase of the value frequency of occurrences and shorten, once drainage pressure is continued above 2bar, outside framework oil seal be able to may be damaged, and then
The Leakage Energy seal failure of hydraulic motor is caused, Leakage Energy, which lets out, may pollute working environment.Operating pressure is higher, bone
The service life of frame oil sealing is shorter.
In addition to common outside framework oil seal, continue to use machinery close under high use condition in some motor drainage pressures
Envelope, its use principle is to rotate against to form sealing surface using two smooth end faces, although this mode can improve horse
Arrive 25bar (relevant with the diameter of axle) up to lasting work drainage pressure allowed band, but service life there is no guarantee that, and installation
It is required that it is higher, difficulty is changed, it is expensive.
To sum up, common outside framework oil seal can not use under the higher particular surroundings of the drainage pressure of hydraulic motor, and machinery is close
Not only cost is high for envelope, it is difficult to change, and the high environment of drainage pressure can only be adapted in certain scope.Either use
Common outside framework oil seal, or be all that hydraulic motor is passively deacclimatized according to the use condition of hydraulic motor using mechanical seal
The change of draining housing pressure, lack active control feature.
It should be noted that the information for being disclosed in the utility model background section is merely intended to increase to this practicality newly
The understanding of the general background of type, and be not construed as recognizing or imply that the information structure has been art technology in any form
Prior art well known to personnel.
Utility model content
The purpose of this utility model is to propose a kind of hydraulic motor drainage pressure control device, makes hydraulic motor casing draining
Pressure is maintained within the scope of the drainage pressure that common outside framework oil seal allows, and can adapt to the use with higher drainage pressure
Environment.
To achieve the above object, the utility model provides a kind of hydraulic motor drainage pressure control device, including oil storage
Device and oil-releasing mechanism, the Fuel Tanking Unit are provided with the hydraulic fluid port connected with the drain tap of hydraulic motor, and for storing the liquid
The leakage fluid of pressure motor, the oil-releasing mechanism connect with the Fuel Tanking Unit, are reached with the oil pressure in the Fuel Tanking Unit
The leakage fluid is discharged by the oil-releasing mechanism during preparatory condition.
Further, the oil-releasing mechanism includes the fluid pressure line connected with fuel tank, and the fluid pressure line is provided with unidirectional
Valve, by the fluid pressure line by the Fuel Tanking Unit when being less than preset value with the oil pressure at least in the Fuel Tanking Unit
Leakage fluid drains into the fuel tank.
Further, the oil-releasing mechanism includes hydraulic pump and the drive device for driving the hydraulic pump operating, institute
The oil inlet for stating hydraulic pump connects with the Fuel Tanking Unit, and the oil-out of the hydraulic pump connects with fuel tank, with the oil storage
When oil pressure in device is more than or equal to preset value by the hydraulic pump by the leakage fluid in the Fuel Tanking Unit extract to
The fuel tank.
Further, the drive device includes motor, and is controlled by the size of current of motor described in control input
The rotating speed of the motor, and then control the rotating speed of the hydraulic pump.
Further, the drive device includes hydraulic drive motor and control valve, the hydraulic drive motor with it is described
Hydraulic pump drive is connected, and the control valve is connected between oil sources and the hydraulic drive motor, to control the oil sources and institute
The break-make that oil circuit is connected between hydraulic drive motor or the oil sources are stated to the output oil amount of the hydraulic drive motor oil transportation, is entered
And control the start and stop of the hydraulic pump or the oil absorption of the hydraulic pump.
Further, in addition to controlling switch, the controlling switch are used to detect the oil pressure in the Fuel Tanking Unit, and root
The opening and closing of the control valve or the aperture of the control valve are controlled according to the size of the oil pressure.
Further, the control valve is reversal valve, and the controlling switch is pressure switch, and the pressure switch being capable of root
The reversal valve commutation is controlled according to the size of the oil pressure.
Further, the control valve is electric proportional reversing valve, and the controlling switch is pressure sensor, and the pressure passes
The oil pressure size detected can be converted into electric signal by sensor, and control the electric proportional reversing valve by the electric signal
Aperture.
Further, the hydraulic pump is constant displacement pump, to control turning for the hydraulic pump by the electric proportional reversing valve
Speed, and then control the oil absorption of the hydraulic pump.
Further, the hydraulic pump is variable pump, to control the row of the hydraulic pump by the electric proportional reversing valve
Size is measured, and then controls the oil absorption of the hydraulic pump.
Based on above-mentioned technical proposal, the utility model is by setting Fuel Tanking Unit and oil-releasing mechanism so that hydraulic motor
Leakage fluid can flow into Fuel Tanking Unit and be stored, and will can let out when the oil pressure in Fuel Tanking Unit reaches preparatory condition
Oil leak liquid is discharged by oil-releasing mechanism, to reach the purpose for reducing oil pressure in Fuel Tanking Unit.Meet hydraulic pressure horse with traditional use
Passive adaptation form up to drainage pressure sealing is compared, and control device of the present utility model has active control feature, as long as storage
Oil pressure in oily device exceedes certain scope, it is possible to is quickly released by oil-releasing mechanism, protects the oil pressure in Fuel Tanking Unit
Hold in tolerance zone, prevent draining high pressure from bringing damage to the shaft end seal of hydraulic motor, not only make common outside framework oil seal
Can on hydraulic motor normal use, avoid using more resistant to pressure the installation that brings of mechanical seal and change difficult and cost
The problems such as high, and go for the use environment with higher drainage pressure, the scope of application is wider.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not form to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the hydraulic principle figure of the utility model hydraulic motor drainage pressure control device one embodiment.
Fig. 2 is the entity structure layout drawing of the utility model hydraulic motor drainage pressure control device one embodiment.
In figure：1st, hydraulic motor；2nd, Fuel Tanking Unit；3rd, check valve；4th, hydraulic pump；5th, shaft coupling；6th, fuel tank；7th, hydraulic pressure drives
Dynamic motor；8th, controlling switch；9th, control valve；10th, oil sources；11st, three-way piece.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in embodiment is carried out clear, complete
Ground describes.Obviously, described embodiment is only part of the embodiment of the present utility model, rather than whole embodiments.
Based on embodiment of the present utility model, institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There is other embodiment, belong to the scope of the utility model protection.
In description of the present utility model, it is to be understood that term " " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " on ", " under ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For the limitation to scope of protection of the utility model.
The higher environment of drainage pressure, mechanical seal can not be adapted to for the common reinforced seal in the presence of prior art
Cost is high, changes the problems such as difficult, and inventor is carefully studied, it was found that a kind of overturn passively adapts to high pressure in the past
The control device of shaft end seal form, the control device, which fundamentally solves common skeleton, can not adapt to higher drainage pressure
Environment and use mechanical seal cost are high, change the problem of difficult.
It is as shown in figure 1, former for the hydraulic control of the utility model hydraulic motor drainage pressure control device one embodiment
Reason figure.In this embodiment, hydraulic motor drainage pressure control device includes Fuel Tanking Unit 2 and oil-releasing mechanism, and Fuel Tanking Unit 2 is set
There is the hydraulic fluid port that the drain tap with hydraulic motor 1 connects, and for collecting and storing the leakage fluid of hydraulic motor 1, oil-releasing mechanism
Connected with Fuel Tanking Unit 2, will leak out fluid by oil-releasing mechanism when reaching preparatory condition with the oil pressure in Fuel Tanking Unit 2 arranges
Go out.
Wherein, Fuel Tanking Unit can be in the oil storage chamber or hydraulic system being arranged in hydraulic system
One interflow module, can also be an independent device for memory leak fluid.The setting of preparatory condition can root
Determined according to being actually needed, such as, preparatory condition can be that oil pressure reaches certain preset value, when oil pressure exceedes the preset value
When, you can leakage fluid is discharged by oil-releasing mechanism.
In the above-described embodiments, by setting Fuel Tanking Unit 2 and oil-releasing mechanism so that the leakage fluid of hydraulic motor 1 can
Stored with flowing into Fuel Tanking Unit 2, and fluid can be will leak out when the oil pressure in Fuel Tanking Unit 2 reaches preparatory condition and led to
Oil-releasing mechanism discharge is crossed, to reach the purpose for reducing oil pressure in Fuel Tanking Unit 2.
Compared with the passive adaptation form that traditional use meets the sealing of hydraulic motor drainage pressure, in above-described embodiment
Control device has active control feature, as long as the oil pressure in Fuel Tanking Unit exceedes certain scope, it is possible to pass through smoke-fume conducting machine
Structure quickly releases, and the oil pressure in Fuel Tanking Unit is maintained in tolerance zone, prevents that draining high pressure is close to the shaft end of hydraulic motor
Envelope brings damage, not only allows common outside framework oil seal normal use on hydraulic motor, avoids using the machinery more resistant to pressure
The installation and change the problems such as difficult and cost is high that band comes, and go for making with higher drainage pressure
It is wider with environment, the scope of application.
Specifically, a kind of specific implementation side as the utility model hydraulic motor drainage pressure control device embodiment
Formula, oil-releasing mechanism include the fluid pressure line connected with fuel tank 6, and fluid pressure line is provided with check valve 3, with least in Fuel Tanking Unit 2
The leakage fluid in Fuel Tanking Unit 2 is drained into by fuel tank 6 by fluid pressure line when interior oil pressure is less than preset value.Wherein, check valve 3
Setting can prevent fluid from flowing back to Fuel Tanking Unit 2 from fuel tank 6.The oil-releasing mechanism of this form is simple in construction, is easy to real
Existing, the restrictive condition of fluid circulation is relatively low, is advantageous to alleviate the oil pressure size in Fuel Tanking Unit 2, avoids oil pressure too greatly to hydraulic pressure
The axle envelope of motor causes to damage.
As another specific implementation of the utility model hydraulic motor drainage pressure control device embodiment, oil extraction
Mechanism includes hydraulic pump 4 and the drive device for driving hydraulic pump 4 to operate, and oil inlet and the Fuel Tanking Unit 2 of hydraulic pump 4 connect
Logical, the oil-out of hydraulic pump 4 connects with fuel tank 6, passes through hydraulic pressure when being more than or equal to preset value with the oil pressure in Fuel Tanking Unit 2
Pump 4 extracts the leakage fluid in Fuel Tanking Unit 2 to fuel tank 6.The oil extraction side extracted by hydraulic pump 4 to leakage fluid
Formula, initiative is stronger, and pressure release is faster.
In the preferred embodiment of the utility model hydraulic motor drainage pressure control device, oil-releasing mechanism both included and oil
The fluid pressure line that case 6 connects, include hydraulic pump 4 and the drive device for driving hydraulic pump 4 to operate again, so in Fuel Tanking Unit
When pressure in 2 is less than preset value, draining can be carried out by fluid pressure line；Pressure in Fuel Tanking Unit 2 is more than or equal to
During preset value, draining is carried out by hydraulic pump 4, draining is more efficient, more reliable.Certainly, in addition to above two oil-releasing mechanism,
Other mechanical structures discharge leakage fluid can also be used.
For drive hydraulic pump 4 operate drive device structure type have it is a variety of, as long as can realize its act on.
For example drive device can include motor, drive hydraulic pump 4 to rotate by the rotation of motor, fluid is will leak out so as to realize
Extract to the purpose in fuel tank 6.Can be come the rotating speed of controlled motor by the size of current of control input motor, and then control liquid
The rotating speed of press pump 4, the control of the oil absorption to hydraulic pump 4 can be realized by the control to the rotating speed of hydraulic pump 4, so that oil storage
Oil pressure cntrol in device 2 is in the range of the shaft end seal of hydraulic motor can be born.
Another specific implementation as drive device in the utility model hydraulic motor drainage pressure control device embodiment
Mode, drive device include hydraulic drive motor 7 and control valve 9, hydraulic drive motor 7 and the drive connection of hydraulic pump 4, preferably
Ground, by shaft coupling 5 hydraulic drive motor 7 can be made to be connected with hydraulic pump 4.Control valve 9 is connected to oil sources 10 and hydraulic-driven horse
Up between 7, with control connected between oil sources 10 and hydraulic drive motor 7 oil circuit break-make or oil sources 10 to hydraulic drive motor
The output oil amount of 7 oil transportations, and then control the start and stop of hydraulic pump 4 or the oil absorption of hydraulic pump 4.
The form of control valve 9 is varied, such as, when control valve 9 is switch valve, can be used for controlling oil sources 10 and liquid
Press the break-make that oil circuit is connected between drive motor 7, during connection oil communication between oil sources 10 and hydraulic drive motor 7, liquid
Press pump 4 starts to rotate, and leakage fluid is extracted in fuel tank 6；Connection oil circuit between oil sources 10 and hydraulic drive motor 7 breaks
When opening, hydraulic pump 4 stops operating, and leakage fluid can flow into fuel tank 6 by fluid pressure line.When control valve 9 is proportional control valve
When, it can be used for controlling oil sources 10 to the output oil amount of the oil transportation of hydraulic drive motor 7, so as to control the rotating speed of hydraulic drive motor 7,
And then the rotating speed of hydraulic pump 4 is controlled, control the oil absorption of hydraulic pump 4.
Further, hydraulic motor drainage pressure control device also includes controlling switch 8, and controlling switch 8, which is used to detect, stores up
Oil pressure in oily device 2, and the opening and closing of control valve 9 or the aperture of control valve 9 are controlled according to the size of oil pressure.Controlled by setting
System switch 8 so that hydraulic pump 4 can automatically turn on, be opened and closed or adjust rotating speed according to the detection signal of controlling switch 8.
In one embodiment of the utility model hydraulic motor drainage pressure control device, control valve 9 is reversal valve, control
System switch 8 is pressure switch, and pressure switch can control reversal valve commutation according to the size of oil pressure.Preferably, control valve 9 is electricity
Magnetic reversal valve, cooperated with pressure switch, control solenoid directional control valve to carry out automatic reverse by pressure switch.
Specifically, one end of controlling switch 8 is connected with Fuel Tanking Unit 2, and the other end is connected with the control terminal of control valve 9.When
When pressure switch detects that the oil pressure in Fuel Tanking Unit 2 is less than preset value, reversal valve is in the first working position, now, oil sources 10
Connection oil circuit between hydraulic drive motor 7 disconnects, and hydraulic pump 4 is in off working state；When pressure switch detects oil storage
When oil pressure in device 2 is more than or equal to preset value, pressure switch sends control signal, reversal valve is commutated to the second work
Position, now, the connection oil communication between oil sources 10 and hydraulic drive motor 7, hydraulic pump 4 is opened, and leakage fluid can pass through liquid
Press pump 4 enters fuel tank 6.
Wherein, the specific constructive form of reversal valve is not construed as limiting, and can be bi-bit bi-pass reversal valve, can also be such as Fig. 1 institutes
It is shown as four two way selected valves.
In addition, control valve 9 can also be electric proportional reversing valve, controlling switch 8 is pressure sensor, and pressure sensor can
The oil pressure size detected is converted into electric signal, and the aperture of electric proportional reversing valve is controlled by electric signal, by adjusting electricity
The aperture of proportional reversing valve, the rotating speed of hydraulic drive motor 7 can be adjusted, and then adjust the rotating speed of hydraulic pump 4, control hydraulic pump
4 oil absorption.
Wherein, hydraulic pump 4 is constant displacement pump, to control the rotating speed of hydraulic pump 4 by electric proportional reversing valve, and then controls hydraulic pressure
The oil absorption of pump 4.
Hydraulic pump 4 can also be variable pump, to control the displacement size of hydraulic pump 4 by electric proportional reversing valve, and then control
The oil absorption of hydraulic pump 4 processed.
Hydraulic motor drainage pressure control device described in above-mentioned each embodiment, can be applied in various needs
On the machine for controlling hydraulic motor drainage pressure, such as excavator etc..As shown in Fig. 2 it is the utility model hydraulic motor draining
The entity structure layout drawing of pressure control device one embodiment, the embodiment is used for two-wheel flute milling machine, under some operating modes,
Hydraulic motor is likely to be at underwater tens meters of depth, and the oil pressure in Fuel Tanking Unit 2 also can be very big, using liquid of the present utility model
Pressure motor drainage pressure control device can be well adapted for the sealing under hyperbaric environment.
Based on the control device in above-mentioned each embodiment, its control flow is：
Oil-releasing mechanism is provided, the oil-releasing mechanism connects with leaking the Fuel Tanking Unit 2 of fluid for storing hydraulic motor 1；
When oil pressure in Fuel Tanking Unit 2 reaches preparatory condition, fluid will leak out by oil-releasing mechanism and discharge.
Further, the flow also includes：Oil-releasing mechanism is connected by the fluid pressure line provided with check valve 3 with fuel tank 6,
At least when the oil pressure of Fuel Tanking Unit 2 is less than preset value, it will leak out fluid and fuel tank 6 drained into by fluid pressure line.
Further, the flow also includes：Hydraulic pump 4 and the drive device for driving hydraulic pump 4 to operate are provided, will
The oil inlet of hydraulic pump 4 connects with Fuel Tanking Unit 2, and the oil-out of hydraulic pump 4 connects with fuel tank 6, big in the oil pressure of Fuel Tanking Unit 2
When preset value, the leakage fluid in Fuel Tanking Unit 2 is extracted to fuel tank 6 by hydraulic pump 4.
Tool with reference to Fig. 1 and Fig. 2 to one embodiment of the utility model hydraulic motor drainage pressure control device
Body structure and the course of work illustrate, it is necessary to which what is illustrated is that the utility model is not limited to the embodiment：
As shown in figure 1, hydraulic motor drainage pressure control device mainly includes：Hydraulic motor 1, Fuel Tanking Unit 2, check valve
3rd, hydraulic pump 4, shaft coupling 5, fuel tank 6, hydraulic drive motor 7, controlling switch 8, control valve 9, oil sources 10 and three-way piece 11, its
In, controlling switch 8 is pressure switch, and control valve 9 is four two electric change valves.
As shown in Fig. 2 in entity structure layout drawing, Fuel Tanking Unit 2, check valve 3, hydraulic pump 4, shaft coupling 5, fuel tank 6,
Hydraulic drive motor 7, controlling switch 8, control valve 9 and oil sources 10 can with integrated installation in a fixing component, check valve 3
Oil-out B can be connected with the oil-out A of hydraulic pump 4 by three-way piece 11 with being connected the pipeline of fuel tank 6.
The drain tap T of hydraulic motor 1 is connected with the T2 mouths of Fuel Tanking Unit 2；The oil inlet A of check valve 3 and Fuel Tanking Unit 2
T1 mouths are connected, and the oil-out B of check valve 3 is connected with fuel tank 6；The oil inlet B of hydraulic pump 4 is connected with the T3 mouths of Fuel Tanking Unit 2, liquid
The oil-out A of press pump 4 is connected with fuel tank 6, and the drain tap T of hydraulic pump 4 is connected with the T4 mouths of Fuel Tanking Unit 2；Hydraulic pump 4 and hydraulic pressure
Drive motor 7 is connected by shaft coupling 5；The oil inlet A of hydraulic drive motor 7 is connected with the B mouths of control valve 9, hydraulic-driven horse
Oil return opening B up to 7 is connected with the T5 mouths of Fuel Tanking Unit 2；One end of controlling switch 8 is connected with Fuel Tanking Unit 2, the other end and control
The control terminal connection of valve 9.
When hydraulic motor 1 operates, leakage fluid flows into Fuel Tanking Unit 2 by T mouths, when controlling switch 8 detects oil storage
When pressure in device 2 is less than preset value, the fluid in Fuel Tanking Unit 2 can flow back to fuel tank 6 by check valve 3；When controlling switch 8
When detecting that the pressure in Fuel Tanking Unit 2 is higher than preset value, controlling switch 8 controls control valve 9 to obtain electric, the pressure from oil sources 10
Oil flows into hydraulic drive motor 7 by control valve 9, and hydraulic drive motor 7 drives hydraulic pump 4 to operate by shaft coupling 5, by oil storage
Leakage Energy liquid pump in device 2 is sent to fuel tank 6, so as to play a part of, by the fluid quick relief in Fuel Tanking Unit 2, ensureing storage
Oil liquid pressure in oily device 2 is within values.When the oil liquid pressure that controlling switch 8 is detected in Fuel Tanking Unit 2 is low
When preset value, the dead electricity of control valve 9, hydraulic pump 4 is set to stop oil suction.
In this embodiment, control valve 9 (four two-way electromagnetic valves) could alternatively be electric proportional reversing valve, controlling switch 8
(pressure switch) could alternatively be pressure sensor, the pressure size arrived according to pressure sensor monitoring, be converted into the magnitude of current, can
The size of current of the electric proportional reversing valve substituted with control, so as to realize the control of the rotating speed to hydraulic drive motor 7, and then control
The rotating speed size of hydraulic pump 4 processed, and then control oil absorption.
In this embodiment, hydraulic pump 4, which can change, makees variable pump, and controlling switch 8 (pressure switch) could alternatively be pressure
Sensor, the pressure size arrived according to pressure sensor monitoring, is converted into the magnitude of current, and the variable pumpage of replacement can be controlled big
It is small, and then realize control of the hydraulic pump 4 to oil absorption.
In this embodiment, hydraulic drive motor 7 can be substituted with motor, be driven by the rotation of direct controlled motor
Hydraulic pump 4, by the change controlled motor rotating speed of input current size, and then control oil absorption.
Pass through the explanation of multiple embodiments to the utility model hydraulic motor drainage pressure control device, it can be seen that this
Utility model hydraulic motor drainage pressure control device embodiment uses Active Control Method, will leak out fluid and passes through oil-releasing mechanism
Discharge, reach the purpose of control Fuel Tanking Unit internal drainage pressure；By the device, not only make common hydraulic motor axle envelope can be with
Normal use, and can avoid changing using the trouble that mechanical seal is brought and high Cost Problems, while can apply in machine
Tool is sealed in unappeasable pressure limit, extends use range.
Finally it should be noted that：Above example is only illustrating the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：Specific embodiment of the present utility model can still be modified or some technical characteristics are equally replaced
Change；Without departing from the spirit of technical solutions of the utility model, it all should cover in the claimed technical scheme of the utility model
Among scope.
Claims (10)
1. a kind of hydraulic motor drainage pressure control device, it is characterised in that described including Fuel Tanking Unit (2) and oil-releasing mechanism
Fuel Tanking Unit (2) is provided with the hydraulic fluid port connected with the drain tap of hydraulic motor (1), and for storing letting out for the hydraulic motor (1)
Oil leak liquid, the oil-releasing mechanism connect with the Fuel Tanking Unit (2), reach default with the oil pressure in the Fuel Tanking Unit (2)
The leakage fluid is discharged by the oil-releasing mechanism during condition.
2. hydraulic motor drainage pressure control device according to claim 1, it is characterised in that the oil-releasing mechanism includes
The fluid pressure line connected with fuel tank (6), the fluid pressure line are provided with check valve (3), with least in the Fuel Tanking Unit (2)
Oil pressure the leakage fluid in the Fuel Tanking Unit (2) is drained into by the fuel tank by the fluid pressure line when being less than preset value
(6)。
3. hydraulic motor drainage pressure control device according to claim 1 or 2, it is characterised in that the oil-releasing mechanism
Including hydraulic pump (4) and the drive device for driving the hydraulic pump (4) to operate, the oil inlet of the hydraulic pump (4) and institute
Fuel Tanking Unit (2) connection is stated, the oil-out of the hydraulic pump (4) connects with fuel tank (6), with the Fuel Tanking Unit (2)
The leakage fluid in the Fuel Tanking Unit (2) is extracted to institute by the hydraulic pump (4) when oil pressure is more than or equal to preset value
State fuel tank (6).
4. hydraulic motor drainage pressure control device according to claim 3, it is characterised in that the drive device includes
Motor, and the rotating speed of the motor is controlled by the size of current of motor described in control input, and then control the hydraulic pump
(4) rotating speed.
5. hydraulic motor drainage pressure control device according to claim 3, it is characterised in that the drive device includes
Hydraulic drive motor (7) and control valve (9), the hydraulic drive motor (7) and the hydraulic pump (4) drive connection, the control
Valve (9) processed is connected between oil sources (10) and the hydraulic drive motor (7), to control the oil sources (10) to be driven with the hydraulic pressure
Connected between dynamic motor (7) oil circuit break-make or output oil amount from the oil sources (10) to the hydraulic drive motor (7) oil transportation,
And then control the start and stop of the hydraulic pump (4) or the oil absorption of the hydraulic pump (4).
6. hydraulic motor drainage pressure control device according to claim 5, it is characterised in that also including controlling switch
(8), the controlling switch (8) is used to detect the oil pressure in the Fuel Tanking Unit (2), and controls institute according to the size of the oil pressure
State the opening and closing of control valve (9) or the aperture of the control valve (9).
7. hydraulic motor drainage pressure control device according to claim 6, it is characterised in that the control valve (9) is
Reversal valve, the controlling switch (8) are pressure switch, and the pressure switch can change according to controlling the size of the oil pressure
Commutated to valve.
8. hydraulic motor drainage pressure control device according to claim 6, it is characterised in that the control valve (9) is
Electric proportional reversing valve, the controlling switch (8) are pressure sensor, the oil pressure size that the pressure sensor will can detect
Electric signal is converted into, and the aperture of the electric proportional reversing valve is controlled by the electric signal.
9. hydraulic motor drainage pressure control device according to claim 8, it is characterised in that the hydraulic pump (4) is
Constant displacement pump, to control the rotating speed of the hydraulic pump (4) by the electric proportional reversing valve, and then control the hydraulic pump (4)
Oil absorption.
10. hydraulic motor drainage pressure control device according to claim 8, it is characterised in that the hydraulic pump (4) is
Variable pump, to control the displacement size of the hydraulic pump (4) by the electric proportional reversing valve, and then control the hydraulic pump
(4) oil absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240696.4U CN206655849U (en) | 2017-03-14 | 2017-03-14 | Hydraulic motor drainage pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240696.4U CN206655849U (en) | 2017-03-14 | 2017-03-14 | Hydraulic motor drainage pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206655849U true CN206655849U (en) | 2017-11-21 |
Family
ID=60316727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720240696.4U Withdrawn - After Issue CN206655849U (en) | 2017-03-14 | 2017-03-14 | Hydraulic motor drainage pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206655849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762874A (en) * | 2017-03-14 | 2017-05-31 | 徐工集团工程机械有限公司 | Hydraulic motor drainage pressure control device and method |
-
2017
- 2017-03-14 CN CN201720240696.4U patent/CN206655849U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762874A (en) * | 2017-03-14 | 2017-05-31 | 徐工集团工程机械有限公司 | Hydraulic motor drainage pressure control device and method |
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