CN108930675A - Hydraulic loading system oil inlet protective device - Google Patents
Hydraulic loading system oil inlet protective device Download PDFInfo
- Publication number
- CN108930675A CN108930675A CN201810888586.8A CN201810888586A CN108930675A CN 108930675 A CN108930675 A CN 108930675A CN 201810888586 A CN201810888586 A CN 201810888586A CN 108930675 A CN108930675 A CN 108930675A
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- CN
- China
- Prior art keywords
- oil
- hydraulic
- filter
- valve
- oil outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Abstract
The invention belongs to the technical fields such as fatigue test, and in particular to a kind of hydraulic loading system oil inlet protective device.The hydraulic loading system oil inlet protective device includes fuel tank, hydraulic pump, first filter, the second filter, overflow valve, pressure reducing valve, electrohydraulic servo valve, hydraulic cylinder, cut-off valve group, accumulator, displacement sensor.Gear fatigue experiment loading system fluid pressure line protective device provided by the invention; the setting cut-off valve group, accumulator in oil outlet pipe; in hydraulic pump startup; excessive pressure can partially enter in accumulator; it can prevent instantaneous pressure when hydraulic pump startup from causing impacting with high pressure to hydraulic parts such as electrohydraulic servo valve, oil outlet pipe and hydraulic cylinders, so as to extend the service life of each hydraulic part.
Description
Technical field
The invention belongs to the technical fields such as fatigue test, and in particular to a kind of hydraulic loading system oil inlet protective device.
Background technique
The fatigue life of machine components will directly affect the life cycle of entire engineering goods, continuous with social economy
Development, the continuous promotion of human industryization level, the fatigue test that people treat machine components are increasingly paid attention to.
The fatigue test of machine components (including various mechanical structured members) is widely used in mechanical industry by engineering developme personnel
In, such as the key core components of the heavy-duty machineries such as automobile, lathe, engineering machinery, it requires to carry out fatigue test.
Loading method used in fatigue test is typically all hydraulic loaded because hydraulic loaded stability it is good, can
Handling strong, high reliablity.Traditional hydraulic loading device mainly connects group by consistent lubricant pipe with hydraulic jack by hydraulic pump
When being difficult to realize at, this traditional loading device for the accurate control of load value, and being difficult to long after loading is complete
Between keep steady load.
In existing gear fatigue experiment, when using hydraulic loading system, hydraulic pump can generate height in the moment of starting
The hydraulic oil of the hydraulic oil of pressure, this high pressure can generate high pressure to hydraulic parts such as various control valves, oil outlet pipe and hydraulic cylinders
Impact, it will reduce the service life of each hydraulic part.
Therefore, the high pressure of moment generation of the hydraulic pump in starting how is reduced to various control valves, oil outlet pipe and liquid
The impacting with high pressure that the hydraulic parts such as cylinder pressure generate, extends the service life of each hydraulic part, it is urgently to be resolved to become those skilled in the art
Technical problem.
Summary of the invention
The present invention is directed at least solve the technical problems existing in the prior art, a kind of hydraulic loading system oil inlet is proposed
Protective device can improve the above-mentioned problems of the prior art.
A kind of hydraulic loading system oil inlet protective device is provided to achieve the purpose of the present invention, including it is fuel tank, hydraulic
Pump, first filter, the second filter, overflow valve, pressure reducing valve, electrohydraulic servo valve, hydraulic cylinder, cut-off valve group, accumulator, displacement
Sensor；
The fuel tank has been respectively communicated with oil outlet pipe and oil return line, and the hydraulic pump is described hydraulic by motor drive
Pump is set in the oil outlet pipe, and the oil inlet of the hydraulic pump is connected to the fuel tank, and the oil outlet of the hydraulic pump is connected to institute
The oil inlet of electrohydraulic servo valve is stated, the oil outlet of the electrohydraulic servo valve distinguishes the rod chamber and rodless cavity of the hydraulic cylinder, institute
The oil outlet for stating hydraulic cylinder is connected to the oil return opening of the electrohydraulic servo valve, and the oil outlet of the electrohydraulic servo valve is connected to the oil return
Pipeline；
It is described electro-hydraulic that the first filter, the second filter, the pressure reducing valve are successively set on the hydraulic pump connection
In the oil outlet pipe of servo valve, the oil outlet pipe between the first filter, the second filter is equipped with cut-off valve group, accumulation of energy
Device, the oil inlet of the cut-off valve group are connected to the oil outlet pipe, and the oil outlet of the cut-off valve group is connected to the accumulator；Institute
It states the oil outlet pipe between first filter, the second filter and is equipped with the overflow valve, the oil inlet of the overflow valve is connected to
The oil outlet of oil outlet pipe, the overflow valve is connected to oil return line；
The hydraulic stem of the hydraulic cylinder is equipped with displacement sensor, and institute's displacement sensors are used to detect the effect of hydraulic cylinder
Stroke, the end of the hydraulic stem of the hydraulic cylinder are the power output end of the hydraulic cylinder, for carrying to being loaded object and apply
Lotus.
Preferably, the oil outlet pipe of the hydraulic pump oil outlet is equipped with check valve, and the oil outlet of the hydraulic pump connects
Lead to the oil inlet of the check valve.
Preferably, first oil filter is the oil filter with by-passing valve.
Preferably, second oil filter is high-pressure filter.
Preferably, the oil return line is equipped with water cooler, and the water cooler is used for hydraulic in oil return line
Oil is cooled down.
Preferably, the oil return line is equipped with third oil filter, and the oil outlet of the third oil filter is connected to fuel tank.
Preferably, the oil filter is the oil filter with by-passing valve.
The invention has the following advantages:
Cut-off is arranged in gear fatigue experiment loading system fluid pressure line protective device provided by the invention in oil outlet pipe
Valve group, accumulator, in hydraulic pump startup, excessive pressure can partially enter in accumulator, can prevent hydraulic pump startup
When instantaneous pressure impacting with high pressure is caused to hydraulic parts such as electrohydraulic servo valve, oil outlet pipe and hydraulic cylinders, so as to extend each liquid
The service life of casting die.
Detailed description of the invention
Fig. 1 is the schematic illustration for the hydraulic loading system oil inlet protective device that embodiment of the present invention provides；
Description of symbols:
Hydraulic pump 1, first filter 2, the second filter 3, overflow valve 4, pressure reducing valve 5, electrohydraulic servo valve 6, hydraulic cylinder 7,
Displacement sensor 8, cut-off valve group 9, accumulator 10, water cooler 11, third filter 12, pressure gauge 13.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
It please refers to shown in Fig. 1, Fig. 1 is the principle for the hydraulic loading system oil inlet protective device that embodiment of the present invention provides
Schematic diagram.
As shown in Figure 1, hydraulic loading system oil inlet protective device provided by the invention, including fuel tank, hydraulic pump 1, first
Filter 2, the second filter 3, overflow valve 4, pressure reducing valve 5, electrohydraulic servo valve 6, hydraulic cylinder 7, displacement sensor 8.
The fuel tank has been respectively communicated with oil outlet pipe and oil return line, and the hydraulic pump 1 is described hydraulic by motor drive
Pump 1 is set in the oil outlet pipe, and the oil inlet of the hydraulic pump 1 is connected to the fuel tank, the oil outlet connection of the hydraulic pump 1
The oil inlet of the electrohydraulic servo valve 6, the oil outlet of the electrohydraulic servo valve 6 distinguish the rod chamber of the hydraulic cylinder 7 and without bars
Chamber, the oil outlet of the hydraulic cylinder 7 are connected to the oil return opening of the electrohydraulic servo valve 6, the oil outlet connection of the electrohydraulic servo valve 6
The oil return line.
The first filter 2, the second filter 3, the pressure reducing valve 5 be successively set on the hydraulic pump 1 be connected to it is described
In the oil outlet pipe of electrohydraulic servo valve 6, the oil outlet pipe between the first filter 2, the second filter 3 is equipped with described overflow
Valve 4 is flowed, the oil inlet of the overflow valve 4 is connected to oil outlet pipe, and the oil outlet of the overflow valve 4 is connected to oil return line, overflow valve 4
Pressure excessively high in oil outlet pipe can be drained into oil return line, and then flow back to fuel tank；The power output of the hydraulic cylinder 7
End acts on the load arm of force 40.
In preferred scheme, it is equipped with pressure gauge 13, on the pipeline that overflow valve 4 is connected to oil outlet pipe to detect flowline
The pressure on road.
In preferred scheme, displacement sensor 8 is equipped on the hydraulic stem of hydraulic cylinder 7, for detecting the effect of hydraulic cylinder 7
Stroke.
In preferred scheme, the oil outlet pipe between the first filter 2, the second filter 3 is equipped with cut-off valve group
9, accumulator 10, the oil inlet of the cut-off valve group 9 are connected to the oil outlet pipe, and the oil outlet of the cut-off valve group 9 is connected to institute
State accumulator 10.The setting cut-off valve group 9, accumulator 10 in oil outlet pipe, when hydraulic pump 1 starts, excessive pressure can be with
Part enters in accumulator 10, and instantaneous pressure is to electrohydraulic servo valve 6, oil outlet pipe and hydraulic when can prevent hydraulic pump 1 from starting
The hydraulic parts such as cylinder 7 cause impacting with high pressure, so as to extend the service life of each hydraulic part.
In preferred scheme, the oil outlet pipe of 1 oil outlet of hydraulic pump is equipped with check valve, the hydraulic pump 1
Oil outlet is connected to the oil inlet of the check valve, and check valve can prevent the hydraulic oil in oil outlet pipe from backflow phenomenon occur.
In preferred scheme, first oil filter is the oil filter with by-passing valve.In order to prevent because of the first oil filter
It blocks and hydraulic pump 1 is overloaded or causes filter core broken, in the oil strain channel parallel connection by-passing valve of the first oil filter, or with the
One oil filter parallel connection clogging indicator, if blocking, can with and alarm.
In preferred scheme, second oil filter is high-pressure filter.Because oil outlet pipe pressure is larger, the second oil strain
Device can resist high pressure.
In preferred scheme, the oil return line is equipped with water cooler 11, and the water cooler 11 is used for oil return pipe
Hydraulic oil in road is cooled down, and hydraulic cylinder 7 can generate a large amount of heat in mechanism, so that the temperature liter of hydraulic oil
Height, in order to avoid the temperature for entering hydraulic oil in fuel tank is too high, the water cooler 11 that is arranged on oil return line can be to returning
Hydraulic oil in oil pipe line is cooled down.
In preferred scheme, the oil return line is equipped with third filter 12, the oil outlet of the third filter 12
It is connected to fuel tank.Third filter 12 has biggish through-current capability, the pressure loss small, can be filled into miscellaneous in oil return line
Matter, to prevent impurity from entering fuel tank.
In preferred scheme, the third filter 12 is the oil filter with by-passing valve.In order to prevent because third filters
Device 12 blocks and makes oil return line oil pressure excessive or cause filter core broken, bypasses in the oil strain channel parallel connection of third filter 12
Valve, or with the clogging indicator in parallel of third filter 12, if blocking, can with and alarm.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (7)
1. a kind of hydraulic loading system oil inlet protective device, which is characterized in that including fuel tank, hydraulic pump, first filter, second
Filter, overflow valve, pressure reducing valve, electrohydraulic servo valve, hydraulic cylinder, cut-off valve group, accumulator, displacement sensor；
The fuel tank has been respectively communicated with oil outlet pipe and oil return line, and the hydraulic pump is set by motor drive, the hydraulic pump
In in the oil outlet pipe, the oil inlet of the hydraulic pump is connected to the fuel tank, and the oil outlet of the hydraulic pump is connected to the electricity
The oil inlet of hydraulic servo, the oil outlet of the electrohydraulic servo valve distinguish the rod chamber and rodless cavity of the hydraulic cylinder, the liquid
The oil outlet of cylinder pressure is connected to the oil return opening of the electrohydraulic servo valve, and the oil outlet of the electrohydraulic servo valve is connected to the oil return pipe
Road；
The first filter, the second filter, the pressure reducing valve are successively set on the hydraulic pump and are connected to the electro-hydraulic servo
In the oil outlet pipe of valve, the oil outlet pipe between the first filter, the second filter is equipped with cut-off valve group, accumulator,
The oil inlet of the cut-off valve group is connected to the oil outlet pipe, and the oil outlet of the cut-off valve group is connected to the accumulator；It is described
Oil outlet pipe between first filter, the second filter is equipped with the overflow valve, and the oil inlet of the overflow valve is connected to out
The oil outlet of oil pipe line, the overflow valve is connected to oil return line；
The hydraulic stem of the hydraulic cylinder is equipped with displacement sensor, and institute's displacement sensors are used to detect the effect row of hydraulic cylinder
Journey, the end of the hydraulic stem of the hydraulic cylinder are the power output end of the hydraulic cylinder, for applying load to being loaded object.
2. hydraulic loading system oil inlet protective device according to claim 1, which is characterized in that the hydraulic pump oil outlet
The oil outlet pipe at place is equipped with check valve, and the oil outlet of the hydraulic pump is connected to the oil inlet of the check valve.
3. hydraulic loading system oil inlet protective device according to claim 1, which is characterized in that first oil filter is
Oil filter with by-passing valve.
4. hydraulic loading system oil inlet protective device according to claim 1, which is characterized in that second oil filter is
High-pressure filter.
5. hydraulic loading system oil inlet protective device according to claim 1, which is characterized in that set on the oil return line
There is water cooler, the water cooler is for cooling down the hydraulic oil in oil return line.
6. hydraulic loading system oil inlet protective device according to claim 1, which is characterized in that set on the oil return line
There is third oil filter, the oil outlet of the third oil filter is connected to fuel tank.
7. hydraulic loading system oil inlet protective device according to claim 6, which is characterized in that the oil filter be with
The oil filter of by-passing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810888586.8A CN108930675A (en) | 2018-08-07 | 2018-08-07 | Hydraulic loading system oil inlet protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810888586.8A CN108930675A (en) | 2018-08-07 | 2018-08-07 | Hydraulic loading system oil inlet protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108930675A true CN108930675A (en) | 2018-12-04 |
Family
ID=64444893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810888586.8A Withdrawn CN108930675A (en) | 2018-08-07 | 2018-08-07 | Hydraulic loading system oil inlet protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108930675A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357472A (en) * | 2020-11-17 | 2021-02-12 | 中国矿业大学 | Automatic tensioning device and tensioning control method for electro-hydraulic combined belt conveyor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115488A (en) * | 2018-08-02 | 2019-01-01 | 清华大学 | Gear fatigue experiment loading system fluid pressure line protective device |
-
2018
- 2018-08-07 CN CN201810888586.8A patent/CN108930675A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115488A (en) * | 2018-08-02 | 2019-01-01 | 清华大学 | Gear fatigue experiment loading system fluid pressure line protective device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357472A (en) * | 2020-11-17 | 2021-02-12 | 中国矿业大学 | Automatic tensioning device and tensioning control method for electro-hydraulic combined belt conveyor |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181204 |