CN201420721Y - Leading hydraulic system - Google Patents
Leading hydraulic system Download PDFInfo
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- CN201420721Y CN201420721Y CN2009200029521U CN200920002952U CN201420721Y CN 201420721 Y CN201420721 Y CN 201420721Y CN 2009200029521 U CN2009200029521 U CN 2009200029521U CN 200920002952 U CN200920002952 U CN 200920002952U CN 201420721 Y CN201420721 Y CN 201420721Y
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- guide
- high pressure
- downstream
- supply line
- valve
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Abstract
The utility model discloses a leading hydraulic system, comprising a liquid storage and a leading supply pipe which educes from the liquid storage and forms a liquid path of the leading hydraulic system. A leading pump in the leading supply pipe is disposed downstream the liquid storage. A fluid flow is generated in the leading supply pipe by extracting liquid from the liquid storage. At least onehigh-pressure filter is disposed downstream the leading pump in the leading supply pipe and at least one device provided with a leading valve is disposed downstream the high-pressure filter.
Description
Technical field
The utility model relates generally to a kind of hydraulic system, relates in particular to a kind of guide's hydraulic system.
Background technique
MU hydraulic power such as wheel loader, excavator, bulldozer etc. realizes various tasks, for example promotes, reduction and mobile earth or other material.This machinery is equipped with the hydraulic system of using hydraulic fluid usually, so that can handle the operating unit in the implement system, for example coupling arrangement, scraper bowl etc.Operating unit in the implement system is usually by the hydraulic actuator that is subjected to actuator valve control Driven by Hydraulic Cylinder for example.Actuator valve can be operated by the facility pilot valve in guide's hydraulic system under the control of mechanical operation member.
This machinery usually is used in the rugged environment, for example the building site.During normal running or in the maintenance period, dust, earth and other chip can enter pilot system and pollute by the various passages hydraulic fluid of Sealing or outlet for example.Some member of guide's hydraulic system, for example facility pilot valve, reduction valve etc. are especially responsive for pollutant.For example, the typical facility pilot valve in guide's hydraulic system has less fluid passage, and than the easier dirt in the hydraulic fluid or the adverse effect of chip of being subjected to of actuator valve.The inefficacy of the valve that causes owing to the pollution of hydraulic fluid may cause whole guide's hydraulic system to break down, and may cause adverse effect to implement system.The possibility of result is that quite long machinery is stopped work and increase maintain/repair cost.
Be typically provided with thick filtering net cheaply in guide's supply line,, and can realize that certain protection is to make it not contaminated thing influence guide's hydraulic system so that screen out the pollutant in the hydraulic fluid.But, because thick filtering net is for filtering dirt and chip only partly effectively, so hydraulic fluid may be still contaminated cheaply.In addition, because the high fluid pressure filter capacity of thick filtering net is limited cheaply,, often be downstream at sensitive valve so thick filtering net is usually located at the area of low pressure cheaply.Because the fluid that pollutes may flow through sensitive valve before arriving the downstream thick filtering net, so the protection that this thick filtering net provides for valve is limited.
The US patent No.4753158 (" ' 158 patents ") that authorized people such as Hirata on June 28th, 1988 discloses the guide's hydraulic system that is used for the direction of operating control valve.In the system of ' 158 patent, the position control valve with two pilot chamber is arranged on the downstream of oil hydraulic pump, and is arranged to control the hydraulic fluid supply from the oil hydraulic pump to the stroke motor.Guide's hydraulic system comprises pilot valve, flow control valve and the first rodding that is used for fluid is guided into pilot chamber.The system of ' 158 patent is used to reduce the caused impact-level of stroke motor, and the raising serviceability and the operability that are associated with guide's hydraulic system.
Although the system of ' 158 patent is suitable for its desired use, the serviceability of the sensitive components in guide's hydraulic system and operability may have problems.Guide's hydraulic system of ' 158 patent is not recognized the receptance of control valve to pollutant in the hydraulic fluid, and does not disclose any filter plant that is used for the cleaning liquid hydraulic fluid.Lack the suitable filtration to hydraulic fluid, disclosed control valve will be subjected to the adverse effect of pollutant in the hydraulic fluid, and the fault of guide's hydraulic system control valve that may cause owing to this pollutant and shutting down continually.
System and method of the present utility model is intended to improve prior art.
The model utility content
On the one hand, the utility model relates to a kind of guide's hydraulic system.This system comprises cistern and guide's supply line, and this guide's supply line draws and form the fluid path of guide's hydraulic system from this cistern.Pioneer pump is arranged on the downstream of cistern in guide's supply line, and is configured to extract out fluid and generates fluid stream from cistern in guide's supply line.At least one high pressure filter is arranged on the downstream of pioneer pump in guide's supply line.At least one facility pilot valve is arranged on the downstream of this at least one high pressure filter.
On the other hand, the utility model member of relating to a kind of guide's of protection hydraulic system is avoided the method for pollutant effect.This method comprises utilizes pioneer pump to extract fluid out and generate fluid stream guide's supply line from cistern, and this pioneer pump is arranged at the downstream of cistern in guide's supply line.This method comprises that priority of use leads at least one the high pressure filter filtered fluid that is arranged at pilot fluid pump downstream in the supply line, and prevents that by this at least one high pressure filter pollutant from arriving the member of guide's hydraulic system.
Description of drawings
Fig. 1 is the schematic representation of exemplary disclosed machinery;
Fig. 2 is the schematic representation of exemplary disclosed guide's hydraulic system that is used for the machinery of Fig. 1.
Embodiment
Fig. 1 illustrates guide's hydraulic system of the present utility model and can be applicable to wherein exemplary mechanical 10.Machinery 10 can be solid mechanical or mobile machine, and it carries out the operation with some types that are associated such as industry such as mining industry, building, agricultural, transportation or any other known industry.For example, machinery 10 can be wheel loader, bulldozer, excavator, non-highway machinery etc.Machinery 10 can comprise the cockpit that power source 12, cooling fan 20, implement system 28 and operating table 22 for example seal.
Power source 12 can comprise the motor (not shown), and this motor can be for example natural gas engine or conspicuous any other motor of those skilled in the art of petrol engine, diesel engine, gaseous propellant engine for example.Power source 12 also can be embodied as the power source of other form, for example fuel cell, energy storage device or any other suitable power source.
Cooling fan 20 can be driven indirectly by power source 12.Particularly, cooling fan 20 can comprise a plurality of blades and the hydraulic pressure cooling fan motor 24 that is associated with the power source 12 of machinery 10.Can utilize the fluid drives cooling fan motor 24 by oil hydraulic pump pressurization, so that fan blade extracts or push air by power source 12 or the heat exchanger (not shown) that is associated with power source 12, described oil hydraulic pump is driven by power source 12.The flow of the pressure fluid by cooling fan motor 24 can be corresponding with the rotating speed of cooling fan 20.
Operating table 22 can be positioned in the middle of power source 12 and the implement system 28.Operating table 22 can comprise steering system, and this steering system has the control mechanism of turning to, for example deflecting roller (not shown) or arrangement of levers (being used for operating handle turns to).Operating table 22 also can comprise for example controlling rod of at least one control apparatus 26, so that the operator can control various members.For example, control apparatus 26 can make the operator can handle the member of implement system 28 via the control valve in guide's hydraulic system.
Fig. 2 illustrates the exemplary hydraulic system 100 that is used for machinery 10.This hydraulic system 100 can comprise other system and the member that implement system 28, steering system 170, guide's hydraulic system 130 and prior art are known.Guide's hydraulic system 130 can be inserted between at least one control apparatus 26 and implement system 28 in the operating table 22.The operator can be communicated with implement system 28 via guide's hydraulic system 130 effectively.
Guide's hydraulic system 130 can comprise the cistern 122 that is configured to store and provide to pilot system hydraulic fluid.This fluid can for example be specific hydraulic fluid or any other suitable fluid.In exemplary hydraulic system 100, cistern 122 also can be directly used in implement system 28, and can be used for steering system 170 indirectly by guide's hydraulic system 130.In certain embodiments, cistern 122 also can be directly used in for example braking system of steering system 170 and/or other system.For example, the steering system 170 of some wheel loaders and braking system are directly supplied with by the cistern identical with implement system 28.Also can imagine, hydraulic system 100 alternatively comprises the cistern of a plurality of separation/independently, and wherein each cistern is exclusively used in special-purpose.
In some machineries, cistern 122 can comprise the recirculation circuit 120 that is associated.For example, recirculation circuit 120 can comprise low pressure pump 126 and at the filter 124 in this low pressure pump downstream.In one embodiment, recirculation circuit 120 can be arranged in the cistern 122 fully.In another embodiment, it is outside and adjacent with this cistern 122 that recirculation circuit 120 can suitably be arranged on cistern 122.Low pressure pump 126 can be volute pump, gear pump or any other suitable low pressure pump.Filter 124 can be low-pressure filter, middle press filtration device or any other suitable filter.Recirculation filtration circuit 120 optionally or is continuously extracted fluid out from cistern 122, make this fluid by filter 124, and make this fluid return cistern 122.
Guide's hydraulic system 130 can comprise guide's supply line 131, and this guide's supply line draws and form the fluid path of guide's hydraulic system 130 from cistern 122.Various members can be associated with guide's supply line 131.For example, guide's hydraulic system 130 can be included in the pioneer pump 132 that is arranged on cistern 122 downstreams in guide's supply line 131.Pioneer pump 132 can be configured to extract fluid out from cistern 122, and generates fluid stream in guide's supply line 131.Pioneer pump 132 can be a high-pressure service pump, its can by from cistern 122, extract fluid out, this fluid and force this fluid to generate fluid stream by guide's supply line 131 in guide's supply line 131 pressurizes.Near the pioneer pump 132 hydraulic pressure can be up to 180 crust or higher.Pioneer pump 132 can for example be a constant flow pump, for example gear pump, radial piston pump, axial piston pump, rotary vane pump etc.Pioneer pump 132 can also for example be variable-displacement pump, for example swash plate operated pump.
Pressure fluid in guide's supply line 131 can be conducted through at least one high pressure filter 134 that for example is positioned at pioneer pump 132 downstreams.High pressure filter 134 can for example be the column filter cell, and it has the band pleated media that is used to catch pollutant.Filter 134 can be included in from less than the mesh size in 5 microns to 30 microns the scope.Also can imagine high pressure filter in order to other type that realizes filtration efficiency.High pressure filter 134 is applicable to clinging to or higher hydrodynamic pressures up to 180.In one embodiment, at least one high pressure filter 134 can comprise the parallel a plurality of high pressure filters that connect and be arranged at pioneer pump 132 downstreams in guide's supply line 131.In another embodiment, at least one high pressure filter 134 can comprise a plurality of high pressure filters that are connected in series and are arranged on pioneer pump 132 downstreams in guide's supply line 131.
In the downstream of high pressure filter 134, at least one reduction valve can be set, described reduction valve is included in fan control and the braking fill valve (filling-valve) 160.In certain embodiments, valve 160 can comprise a plurality of reduction valve.For example, valve 160 can comprise the reduction valve 161 that is connected to steering system 170 via pipeline 162.The hydrodynamic pressure that reduction valve 161 may command are associated with steering system 170.Valve 160 also can comprise the reduction valve 163 that is connected with at least one facility pilot valve 140 via pipeline 165.The hydrodynamic pressure that reduction valve 163 may command are associated with facility pilot valve 140.In the downstream of fan control and braking fill valve 160, can be provided for driving the oil hydraulic motor 136 of load 137.As shown in Figure 1, motor 136 can be a cooling fan motor 24, and load 137 can be a cooling fan 20.Pilot system 130 can further comprise cooler 138, and this cooler is positioned at the downstream of oil hydraulic motor 136, and is configured to reduce the temperature of hydraulic fluid.Cooler 138 can comprise the outlet that is connected to cistern 122 by pipeline 164.
As shown in Figure 2, implement system 28 can comprise the facility supply line 128 of drawing from a cistern, and this cistern can be the cistern 122 in as shown in Figure 2 the pilot system 130.Cistern can also be the independent cistern that is exclusively used in implement system 28.Implement system pump 152 can be arranged in facility supply line 128, and filter 154 can be positioned at the downstream of this implement system pump 152 and be positioned at the upstream of actuator valve 156.According to valve 156 is low pressure valve or high pressure valve, and filter 154 can be low-pressure filter or the high pressure filter with suitable efficient.Implement system 28 also can comprise oil hydraulic cylinder 34, and this oil hydraulic cylinder is configured to scalable to handle described arm 30.Oil hydraulic cylinder 34 can be the linear double-acting hydraulic cylinder that briefly shows in Fig. 2.Oil hydraulic cylinder 34 can be for example be connected to actuator valve 156 via the pipeline 157-hydraulic pressure of suitable supply and return pipeline-for example briefly show in Fig. 2, and is subjected to this actuator valve 156 controls.
Industrial usability
Disclosed guide's hydraulic system 130 can be used for having any machinery of hydraulic system, hydraulic fluid is offered the member of various hydraulic controls.Guide's hydraulic system 130 can be used for rugged environment, and pollutant can enter hydraulic system and contaminated liquid hydraulic fluid under this environment, causes sensitive components-for example facility pilot valve and reduction valve-inefficacy or damage.Disclosed guide's hydraulic system can provide improved filter efficiency, protects sensitive valve better, and resists environmental pollution better.In machinery 10, use this guide's hydraulic system 130 can reduce idle cost and maintenance cost greatly.
As shown in Figure 2, guide's hydraulic system 130 can comprise cistern 122 in guide's supply line 131.Cistern 122 can be used for storing fluid and fluid is supplied with various systems and member.For example, cistern 122 can be served guide's hydraulic system 130 and/or implement system 28 and/or various other mechanical system.Guide's hydraulic system 130 can comprise the pioneer pump 132 that is positioned at cistern 122 downstreams.Pioneer pump 132 can be extracted fluid out from cistern 122, and generates fluid stream in guide's supply line 132.At least one high pressure filter 134 can be set in the downstream of pioneer pump 132, and it can be used for the pollutant in the purge fluid flow, thus protection downstream member for example facility pilot valve 140, reduction valve 161 and 163 etc.Can be connected in series or walk abreast and connect a plurality of high pressure filters 134 to improve filter efficiency.High pressure filter 134 can be kept up to 180 crust or higher hydraulic pressure.High pressure filter 134 can be the high efficiency particulate air filter that has from less than 5 microns to 30 microns mesh size.
Cleaning fluid from high pressure filter 134 can flow through various pilot system members, for example fan control and braking fill valve 160, and this fill valve can comprise reduction valve 161 and 163.The pressure that reduction valve 161 may command are associated with downstream steering system 170, this steering system can be used for controlling the movement direction of machinery 10.The pressure that reduction valve 163 may command are associated with downstream facility pilot valve 140.After by fan control and braking fill valve 160, hydraulic fluid can be introduced to oil hydraulic motor 136 and cooler 138.Oil hydraulic motor 136 can be used for driving and this motor 136 machineries or the relevant load 137 of electricity.In one embodiment and with reference to Fig. 1, motor 136 can be a cooling fan motor 24, load 137 can be the cooling fan 20 that is driven by motor 24.Cooling fan 20 can with power source 12 for example motor be associated, to reduce the temperature of this motor.Cooler 138 can be positioned at the downstream of oil hydraulic motor 136, and can be used for reducing the temperature from the fluid of motor 24.The fluid that leaves the outlet of cooler 138 can return cistern 122 via pipeline 164.
The flow of hydraulic fluid of leaving fan control and braking fill valve 160 also can be introduced at least one facility pilot valve 140 in reduction valve 163 downstreams.The regulated fluid that can be used for facility pilot valve 140 flows and pressure, to control the actuator valve 156 in the implement system 28 of other downstream member-for example.The facility pilot valve 140 for example person of being operated is operated via coupling arrangement 141 and control apparatus 26, but and hydraulic machine or the operation of electric liquid ground.Facility pilot valve 140 also can be related with downstream actuator 156 hydraulic pressure in the implement system 28.When the operator handled control apparatus 26, facility pilot valve 140 can activated so that the valve element is displaced to the precalculated position.By opening or closing fluid passage, facility pilot valve 140 can regulate fluids flow and pressure, thus control downstream actuator valve 156.Therefore, actuator valve 156 can be displaced to the precalculated position by facility pilot valve 140, and can regulate arrives and leave the flow of pressurized of the fluid chamber of oil hydraulic cylinder 34, so that this oil hydraulic cylinder stretches and withdrawal.The various operating units that oil hydraulic cylinder 34 can be used for controlling machinery 10 are the operating unit of arm 30, scraper bowl 32, scoop or any other type for example.
By at least one is efficient, that high pressure filter is positioned at pioneer pump downstream and the sensitive components upstream of facility pilot valve for example, disclosed guide's hydraulic system can be by preventing that pollutant in the hydraulic fluid from arriving sensitive components more effective protection is provided.Therefore, disclosed guide's hydraulic system can significantly reduce idle cost and maintenance cost.Should point out that term " prevents from " should make literal interpretation at this, but not absolute idealization, its implication is as far as possible reasonably near target from the strategy.Those skilled in the art will appreciate that it is unpractical that the pollutant that prevents utterly in the hydraulic fluid arrives responsive guide's hydraulic system member.But disclosed exemplary embodiment for example is provided with at least one high pressure filter to guarantee the filter result improvement and these members are realized better protection by the upstream at these members in the literary composition, can solve the pollution problem that is associated with sensitive components substantially.
Those skilled in the art will be clear that, can make various modifications and variations to disclosed guide's hydraulic system.Those skilled in the art will be clear that other embodiment of guide's hydraulic system from the description of the disclosed embodiments and practice.Specification and example should only be considered to exemplary, and true scope of the present utility model is defined by the following claims.
Claims (14)
1. guide's hydraulic system is characterized in that, this system comprises:
Cistern;
Guide's supply line, this guide's supply line draws and forms the fluid path of this guide's hydraulic system from cistern;
Pioneer pump, this pioneer pump is arranged on the downstream of this cistern in this guide's supply line, and is configured to extract out fluid and generates fluid stream from this cistern in this guide's supply line;
At least one high pressure filter, this at least one high pressure filter are arranged on the downstream of this pioneer pump in this guide's supply line; And
At least one facility pilot valve, this at least one facility pilot valve is arranged on the downstream of this at least one high pressure filter.
2. according to the system of claim 1, it is characterized in that described at least one high pressure filter comprises parallel connect and a plurality of high pressure filters be arranged on described pioneer pump downstream in described guide's supply line.
3. according to the system of claim 1, it is characterized in that described at least one high pressure filter comprises a plurality of high pressure filters that are connected in series and be arranged on described pioneer pump downstream in described guide's supply line.
4. according to the system of claim 1, it is characterized in that this system also comprises the recirculation circuit that is associated with described cistern, described recirculation circuit comprises low pressure pump and is positioned at the filter in described low pressure pump downstream.
5. according to the system of claim 1, it is characterized in that this system also comprises at least one reduction valve that is arranged on described at least one high pressure filter downstream.
6. according to the system of claim 1, it is characterized in that described pioneer pump is the fixed displacement high-pressure service pump.
7. according to the system of claim 1, it is characterized in that described pioneer pump is to become the discharge capacity high-pressure service pump.
8. according to the system of claim 1, it is characterized in that described at least one facility pilot valve is one of hydraulic machine valve and electro hydraulic valve.
9. according to the system of claim 1, it is characterized in that described at least one high pressure filter has less than the mesh size in 5 microns to 30 microns the scope.
10. according to the system of claim 1, it is characterized in that this system also comprises oil hydraulic motor, this oil hydraulic motor is arranged on described at least one high pressure filter downstream, and is used to drive load.
11. the system according to claim 10 is characterized in that, described oil hydraulic motor is the cooling fan motor, and described load is a cooling fan.
12. the system according to claim 1 is characterized in that, this system also comprises the cooler that is arranged on described at least one high pressure filter downstream.
13. a machinery that comprises hydraulic system is characterized in that, this machinery comprises:
At least one oil hydraulic cylinder;
Be used to that described at least one oil hydraulic cylinder is stretched and at least one actuator valve of withdrawal; And
Guide's hydraulic system comprises:
Cistern;
Guide's supply line, this guide's supply line draws and forms the fluid path of this guide's hydraulic system from cistern;
Pioneer pump, this pioneer pump is arranged on the downstream of this cistern in this guide's supply line, and is configured to extract out fluid and generates fluid stream from this cistern in this guide's supply line;
At least one high pressure filter, this at least one high pressure filter are arranged on the downstream of this pioneer pump in this guide's supply line;
At least one facility pilot valve, this at least one facility pilot valve is arranged on the downstream of this at least one high pressure filter; And
At least one reduction valve, this at least one reduction valve is arranged on the downstream of this at least one high pressure filter.
14. the machinery according to claim 13 is characterized in that, this machinery is wheel loader.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US675608P | 2008-01-30 | 2008-01-30 | |
| US61/006,756 | 2008-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201420721Y true CN201420721Y (en) | 2010-03-10 |
Family
ID=41807373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200029521U Expired - Fee Related CN201420721Y (en) | 2008-01-30 | 2009-02-01 | Leading hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201420721Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226347A (en) * | 2011-04-21 | 2011-10-26 | 江苏中机矿山设备有限公司 | Novel power transmission system for backhoe loaders for coal mining |
| CN103362899A (en) * | 2012-04-10 | 2013-10-23 | 斗山工程机械（山东）有限公司 | Pilot, heat dissipation and integration hydraulic system and loading machine |
| CN109882473A (en) * | 2019-03-19 | 2019-06-14 | 首钢集团有限公司 | A kind of hydraulic system pollution balance control method |
-
2009
- 2009-02-01 CN CN2009200029521U patent/CN201420721Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226347A (en) * | 2011-04-21 | 2011-10-26 | 江苏中机矿山设备有限公司 | Novel power transmission system for backhoe loaders for coal mining |
| CN103362899A (en) * | 2012-04-10 | 2013-10-23 | 斗山工程机械（山东）有限公司 | Pilot, heat dissipation and integration hydraulic system and loading machine |
| CN103362899B (en) * | 2012-04-10 | 2016-10-19 | 斗山工程机械（山东）有限公司 | Guide, heat radiation integrated hydraulic system and loader |
| CN109882473A (en) * | 2019-03-19 | 2019-06-14 | 首钢集团有限公司 | A kind of hydraulic system pollution balance control method |
| CN109882473B (en) * | 2019-03-19 | 2020-06-19 | 首钢集团有限公司 | Pollution balance control method for hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20140201 |