CN107761804A - The hydraulic crawler excavator power source system of more pressure ranks - Google Patents
The hydraulic crawler excavator power source system of more pressure ranks Download PDFInfo
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- CN107761804A CN107761804A CN201710965407.1A CN201710965407A CN107761804A CN 107761804 A CN107761804 A CN 107761804A CN 201710965407 A CN201710965407 A CN 201710965407A CN 107761804 A CN107761804 A CN 107761804A
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- hydraulic pump
- hydraulic
- pressure
- pump
- quantitative
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of hydraulic crawler excavator power source system of more pressure ranks, including hydraulic crawler excavator power source and its hydraulic crawler excavator execution system control loop, the hydraulic crawler excavator power source are that quantitative hydraulic pump A oil-out connects with volume adjustable hydraulic pump A oil inlet；Quantitative hydraulic pump B oil-out connects with volume adjustable hydraulic pump B oil inlet；Prime mover specified rate hydraulic pump and volume adjustable hydraulic pump provide motive power；Hydraulic accumulator, pressure sensor, overflow valve are connected with the oil-out of quantitative hydraulic pump；Check valve is located at the both ends of volume adjustable hydraulic pump；Low tension loop control valve oil inlet connects with quantitative hydraulic pump oil-out；The oil-out of low tension loop control valve connects with hydraulic crawler excavator low tension loop；The system is regulated and controled by the classification of constant displacement pump and variable pump, realizes the control of the rank of hydraulic system at least four, has the rotating speed for improving hydraulic pump, pressure, and then improve the advantage of hydraulic pump works efficiency.
Description
Technical field
The invention belongs to hydraulic power system technical field, and in particular to one kind can be applied to positive flow or minus flow, more
The hydraulic crawler excavator power source system of pressure rank output.
Background technology
In engineering application, hydraulic pump is a kind of Hydraulic Elements that power is provided for hydraulic system, and its function is by original
The mechanical energy of motivation is converted into the pressure energy of liquid, and what output flow was adjusted as needed is referred to as variable pump, and flow can not be adjusted
Section is referred to as constant displacement pump, and hydraulic pump has high rotating speed hydraulic pump, high pressure hydraulic pump, high efficiency hydraulic pump, and is born with good
Carry the hydraulic pump of adaptability.
At present, the rated pressure of big flow Variable plunger pump reaches 45MPa even more highs, and gross efficiency is in the model that largely works
Reach more than 85% in enclosing.In order to further improve the power density of hydraulic pump, the development trend of hydraulic pump be can bear it is higher
Pressure and Geng Gao rotating speed.But further adherence pressure grade is held by pump configuration, parts intensity and crucial friction pair
The restriction of loading capability, the difficulty for being difficult to overcome technically be present.The rotating speed of hydraulic pump is improved, by pump under normal fuel injection pressure
The limitation of inlet port cavitation pressure, only improved from structure technically also restrained.Further to improve pump pressure,
Rotating speed and efficiency techniques difficulty are larger, and cost also can be very high.
The content of the invention
It is an object of the invention to provide one kind under low-load pressure efficient operation, or under high rotating speed, high pressure
The hydraulic crawler excavator power source system of more pressure ranks of efficiency operation.
Therefore, the present invention is provided with the approach of being correspondingly improved, the constant displacement pump that use can change rotating speed replaces variable pump, will be single
The mode of pump output high pressure is changed to the pressure using double pump grading control pump, it is not necessary to which pump can be realized by changing existing pump configuration
High speed and high pressure grade, and can meet simultaneously high-low pressure load the needs of, realize hydraulic pump small size, the work(of big flow
Energy.
To achieve these goals, the technical scheme is that a kind of hydraulic crawler excavator power source system of more pressure ranks
System, including hydraulic crawler excavator power source and its hydraulic crawler excavator execution system control loop, the hydraulic crawler excavator power source contain
There are quantitative hydraulic pump A, quantitative hydraulic pump B, volume adjustable hydraulic pump A, volume adjustable hydraulic pump B, prime mover A, prime mover B, check valve, hydraulic pressure
Accumulator, pressure sensor, low tension loop control valve and overflow valve；It is characterized in that：
The oil-out of the quantitative hydraulic pump A connects with the oil inlet of the volume adjustable hydraulic pump A；The quantitative hydraulic pump B's goes out
Hydraulic fluid port connects with the oil inlet of the volume adjustable hydraulic pump B；The oil-out of the volume adjustable hydraulic pump A and hydraulic crawler excavator execution system
Control loop left end oil inlet connects；The oil-out of the volume adjustable hydraulic pump B is right with hydraulic crawler excavator execution system control loop
Hold oil inlet connection；Prime mover A specified rate hydraulic pump A and quantitative hydraulic pump B provide motive power；Prime mover B is to change
Measure hydraulic pump A and volume adjustable hydraulic pump A and motive power is provided；The hydraulic accumulator, pressure sensor, overflow valve and quantitative hydraulic pump
Oil-out be connected；The check valve is located at the both ends of volume adjustable hydraulic pump；The low tension loop control valve oil inlet is with quantifying
Hydraulic pump oil-out connects；The oil-out of the low tension loop control valve connects with hydraulic crawler excavator low tension loop；
The power source is provided with single hydraulic pump works either two hydraulic pumps while the both of which that works, and works as load pressure
It is relatively low, while require that hydraulic pressure revolution speed is low, independently it is operated using quantitative hydraulic pump A and quantitative hydraulic pump B, passes through check valve
Quantitative hydraulic pump A and quantitative hydraulic pump B output pressure are directly supplied to excavator execution system control loop；When load is pressed
Power is high, while when requiring that hydraulic pressure revolution speed is high, quantitative hydraulic pump A and volume adjustable hydraulic pump A is connected, quantitative hydraulic pump B and variable liquid
Press pump B is connected, and four hydraulic pumps are worked simultaneously, and excess energy is stored in hydraulic accumulator caused by system, is passed by pressure
Sensor determines the storage or release of energy；No matter loop is high-voltage load or low-voltage load, and quantitative hydraulic pump exports unnecessary
Pressure is exported to low tension loop by low tension loop control valve and utilized；The overflow valve is loop protection.
Further it is technically characterized in that：Power source in the hydraulic crawler excavator system can realize that multiple pressure stages are other
Output, by controlling the size of four hydraulic pressure pump output pressures, system can realize the output of at least four different pressures ranks；Institute
It can be that inverted flux control loop, positive flow control loop or inlet and outlet are independent to state hydraulic crawler excavator execution system control loop
Control loop, when using minus flow variable pump for inverted flux control loop, when using positive flow for positive flow control loop
Variable pump；The hydraulic pump can be controlled driving simultaneously by same prime mover, also can control driving by respective prime mover；The original
Motivation is one kind in motor, internal combustion engine and flywheelless engine.
The hydraulic crawler excavator power source system for a kind of more pressure ranks that the invention described above is provided, with prior art phase
Than the system has following features：
It is the high speed and high pressure grade that pump is achieved that on it need not change existing pump architecture basics first, and can expires simultaneously
The demand of sufficient high-low pressure load, can realize hydraulic pump small size, the function of big flow.
Second is that constant displacement pump can work independently applied to low tension loop, can also be pushed back with variable pump while job applications in height
Road, the restriction loss of valve port is reduced, improve the output pressure and output speed of pump.
3rd is that the excess pressure that constant displacement pump exports can be supplied in low tension loop, meets load request.
4th is that power resource loop is provided with accumulator, and hydraulic pump can be exported to unnecessary energy and carry out storage recycling,
Reduce system heat generation, increase the time of machine continuous firing, alleviate the problem of fuel tank long term high temperature is easy to aging.
Brief description of the drawings
The structural representation of the hydraulic crawler excavator power source system of the more pressure ranks of Fig. 1 present invention.
The single prime mover of Fig. 2 present invention controls the system structure diagram of four hydraulic pumps.
The single prime mover of Fig. 3 present invention controls the system structure diagram of constant displacement pump and variable pump simultaneously.
In figure：1：Quantitative hydraulic pump A, 2：Quantitative hydraulic pump B, 3：Volume adjustable hydraulic pump A, 4：Volume adjustable hydraulic pump B, 5：Prime mover
A、6：Prime mover B, 7：Check valve, 8：Hydraulic accumulator, 9：Pressure sensor, 10：Low tension loop control valve, 11：Overflow valve,
12：Travel motor control valve, 13：Running motor, 14：Bucket, 15：Bucket hydraulic cylinder, 16：Boom control valves, 17：It is dynamic
Arm hydraulic cylinder, 18：Arm control valve, 19：Dipper hydraulic cylinder, 20：Rotary motor control valve, 21：Rotary motor.
Specific embodiment
The embodiment of the present invention is made further instructions below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, a kind of hydraulic crawler excavator power source system of more pressure ranks, including hydraulic crawler excavator power source, liquid
Press excavator execution system control loop, the hydraulic crawler excavator execution system control loop include travel motor control valve 12,
Running motor 13, bucket 14, bucket hydraulic cylinder 15, boom control valves 16, boom cylinder 17, arm control valve 18,
Dipper hydraulic cylinder 19, rotary motor control valve 20, rotary motor 21, it is characterised in that：The hydraulic crawler excavator power source includes
Quantitative hydraulic pump A1, quantitative hydraulic pump B2, volume adjustable hydraulic pump A3, volume adjustable hydraulic pump B4, prime mover A5, prime mover B6, check valve
7th, hydraulic accumulator 8, pressure sensor 9, low tension loop control valve 10, overflow valve 11, the oil-out of the quantitative hydraulic pump A1
Connected with the oil inlet of the volume adjustable hydraulic pump A3；The oil-out of the quantitative hydraulic pump B2 enters with the volume adjustable hydraulic pump B4's
Hydraulic fluid port connects；The oil-out of the volume adjustable hydraulic pump A3 connects with hydraulic crawler excavator execution system control loop left end oil inlet；
The oil-out of the volume adjustable hydraulic pump B4 connects with hydraulic crawler excavator execution system control loop right-hand member oil inlet；Described prime mover
A5 specified rate hydraulic pump A1 and quantitative hydraulic pump B2 provide motive power；Prime mover B6 is to volume adjustable hydraulic pump A3 and variable delivery hydraulic
Pump A4 provides motive power；The hydraulic accumulator 8, pressure sensor 9, overflow valve 11 are connected with the oil-out of quantitative hydraulic pump
It is logical；The check valve 7 is located at the both ends of volume adjustable hydraulic pump；The oil inlet of low tension loop control valve 10 and quantitative hydraulic pump are fuel-displaced
Mouth connection；The oil-out of the low tension loop control valve 10 connects with hydraulic crawler excavator low tension loop.
When loop load is low pressure, quantitative hydraulic pump A1 and quantitative hydraulic pump B2 pass through original according to actual loading needs
The driving of motivation 5 exports identical or different pressure, realizes the output of two ranks；Quantitative hydraulic pump A1 and quantitative hydraulic pump B2
Oil-out connected with check valve 7, the pressure of output can be supplied directly into excavator execution system control loop, quantitative hydraulic pump
The excess pressure of A1 and quantitative hydraulic pump B2 outputs can be exported to low tension loop by low tension loop control valve 10, dug for driving
The low pressure executive component dug in machine hydraulic system, improve capacity usage ratio；When loop load is high pressure, it is necessary to quantitative hydraulic pump
A1 and quantitative hydraulic pump B2 and volume adjustable hydraulic pump A3 and volume adjustable hydraulic pump B4 are worked simultaneously, and variable delivery hydraulic is driven by prime mover 6
Pump A3 and volume adjustable hydraulic pump B4 exports identical or different pressure, so as to realize four other outputs of pressure stage, the pressure of output
Excavator execution system control loop is supplied to by volume adjustable hydraulic pump A3 and volume adjustable hydraulic pump B4 oil-out；Produced in loop
Excess energy be stored in hydraulic accumulator 8, pass through pressure sensor 9 determine energy storage or release；The overflow valve
11 mainly play loop protection.
In the above-described embodiments, the power source in excavator hydraulic system can realize the other output of multiple pressure stages, pass through
The size of four hydraulic pressure pump output pressures is controlled, system can realize the output of four different pressures ranks.
In the above-described embodiments, hydraulic crawler excavator execution system control loop is inverted flux control loop, is made in power source
Volume adjustable hydraulic pump is minus flow variable pump.
In the above-described embodiments, quantitative hydraulic pump controls driving simultaneously by same prime mover, and volume adjustable hydraulic pump is by another
Prime mover controls driving simultaneously.
In the above-described embodiments, prime mover is internal combustion engine.
Embodiment 2
As shown in Figure 2, each Hydraulic Elements connected mode of excavator system and operation principle are similar to Example 1, and difference is
Power source prime mover 5 drives quantitative hydraulic pump A1, quantitative hydraulic pump B2, volume adjustable hydraulic pump A3, volume adjustable hydraulic pump B4 tetra- respectively
Individual hydraulic pump, according to the needs of actual loading, four hydraulic pumps can each determine the pressure of output circuit, same to can be achieved four
The other output of pressure stage, the installing space of hydraulic system can be reduced.
In the above-described embodiments, the power source in excavator hydraulic system can realize the other output of multiple pressure stages, pass through
The size of four hydraulic pressure pump output pressures is controlled, system can realize the output of four different pressures ranks.
In the above-described embodiments, hydraulic crawler excavator execution system control loop is positive flow control loop, is made in power source
Volume adjustable hydraulic pump is positive flow variable pump.
In the above-described embodiments, quantitative hydraulic pump and volume adjustable hydraulic pump all control driving simultaneously by same prime mover.Upper
State in embodiment, prime mover is internal combustion engine.
Embodiment 3
As shown in Figure 3, each Hydraulic Elements connected mode of excavator system and operation principle are similar to Example 1, and difference is
Power source it is left it is half of in prime mover 5 drive quantitative hydraulic pump A1 and volume adjustable hydraulic pump A3, power source it is right it is half of in prime mover 6
Quantitative hydraulic pump B2 and volume adjustable hydraulic pump B4 is driven, also can realize four other outputs of pressure stage according to the needs of actual loading.
In the above-described embodiments, the power source in excavator hydraulic system can realize the other output of multiple pressure stages, pass through
The size of four hydraulic pressure pump output pressures is controlled, system can realize the output of four different pressures ranks.
In the above-described embodiments, hydraulic crawler excavator execution system control loop is inverted flux control loop, is made in power source
Volume adjustable hydraulic pump is minus flow variable pump.
In the above-described embodiments, left half of quantitative hydraulic pump A1 and volume adjustable hydraulic pump A3 is right by same prime mover driven
Half of quantitative hydraulic pump B1 and volume adjustable hydraulic pump B3 are by same prime mover driven.
In the above-described embodiments, prime mover is motor.
Claims (5)
1. a kind of hydraulic crawler excavator power source system of more pressure ranks, including hydraulic crawler excavator power source and its hydraulic crawler excavator
Execution system control loop, the hydraulic crawler excavator power source contain quantitative hydraulic pump A（1）, quantitative hydraulic pump B（2）, variable liquid
Press pump A（3）, volume adjustable hydraulic pump B（4）, prime mover A（5）, prime mover B（6）, check valve（7）, hydraulic accumulator（8）, pressure pass
Sensor（9）, low tension loop control valve（10）And overflow valve（11）；It is characterized in that：
The quantitative hydraulic pump A（1）Oil-out and the volume adjustable hydraulic pump A（3）Oil inlet connection；The quantitative hydraulic pump
B（2）Oil-out and the volume adjustable hydraulic pump B（4）Oil inlet connection；The volume adjustable hydraulic pump A（3）Oil-out and hydraulic pressure
Excavator execution system control loop left end oil inlet connects；The volume adjustable hydraulic pump B（4）Oil-out held with hydraulic crawler excavator
Row system control loop right-hand member oil inlet connects；Prime mover A（5）Specified rate hydraulic pump A（1）And quantitative hydraulic pump B（2）Carry
For motive power；Prime mover B（6）Give volume adjustable hydraulic pump A（3）And volume adjustable hydraulic pump A（4）Motive power is provided；The hydraulic pressure stores
Can device（8）, pressure sensor（9）, overflow valve（11）It is connected with the oil-out of quantitative hydraulic pump；The check valve（7）It is located at
The both ends of volume adjustable hydraulic pump；The low tension loop control valve（10）Oil inlet connects with quantitative hydraulic pump oil-out；The low pressure
Circuit controls valve（10）Oil-out connected with hydraulic crawler excavator low tension loop；
The power source is provided with single hydraulic pump works either two hydraulic pumps while the both of which that works, and works as load pressure
It is relatively low, while require that hydraulic pressure revolution speed is low, using quantitative hydraulic pump A（1）With quantitative hydraulic pump B（2）Independently it is operated, passes through
Check valve（7）Directly by quantitative hydraulic pump A（1）With quantitative hydraulic pump B（2）Output pressure be supplied to excavator execution system control
Loop processed；When load pressure is high, while requires that hydraulic pressure revolution speed is high, quantitative hydraulic pump A（1）With volume adjustable hydraulic pump A（3）Connect
It is logical, quantitative hydraulic pump B（2）With volume adjustable hydraulic pump B（4）Connect, four hydraulic pumps are worked simultaneously, and excess energy caused by system is stored up
Hydraulic accumulator be present（8）In, pass through pressure sensor（9）Determine the storage or release of energy；No matter loop is high-voltage load
Or low-voltage load, the excess pressure of quantitative hydraulic pump output pass through low tension loop control valve（10）Output is sharp to low tension loop
With；The overflow valve（11）It is loop protection.
2. the hydraulic crawler excavator power source system of more pressure ranks according to claim 1, it is characterised in that：The hydraulic pressure
Excavator power source includes the output of at least four different pressures ranks, and is controlled by four hydraulic pressure pump output pressure sizes.
3. the hydraulic crawler excavator power source system of more pressure ranks according to claim 1, it is characterised in that：The hydraulic pressure
Excavator execution system control loop be inverted flux control loop, positive flow control loop or inlet and outlet individual control loop,
Minus flow variable pump is used when for inverted flux control loop, positive flow variable is used when for positive flow control loop
Pump.
4. the hydraulic crawler excavator power source system of more pressure ranks according to claim 1, it is characterised in that：The hydraulic pressure
Pump can be controlled driving simultaneously by same prime mover or be controlled by respective prime mover and driven.
5. the hydraulic crawler excavator power source system of more pressure ranks according to claim 1, it is characterised in that：It is described former dynamic
Machine is one kind in motor, internal combustion engine and flywheelless engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965407.1A CN107761804B (en) | 2017-10-17 | 2017-10-17 | Multi-pressure-level hydraulic excavator power source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965407.1A CN107761804B (en) | 2017-10-17 | 2017-10-17 | Multi-pressure-level hydraulic excavator power source system |
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| Publication Number | Publication Date |
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| CN107761804A true CN107761804A (en) | 2018-03-06 |
| CN107761804B CN107761804B (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710965407.1A Active CN107761804B (en) | 2017-10-17 | 2017-10-17 | Multi-pressure-level hydraulic excavator power source system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644091A (en) * | 2018-06-19 | 2018-10-12 | 姚长水 | A kind of device and its flow rate adjusting method of adjustable quantitative hydraulic pump flow |
| CN109058195A (en) * | 2018-10-30 | 2018-12-21 | 徐工集团工程机械有限公司 | The hydraulic control system for equipment of speedily carrying out rescue work and equipment of speedily carrying out rescue work |
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| CN105839689A (en) * | 2016-04-26 | 2016-08-10 | 华侨大学 | Multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and control method |
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2017
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| WO1996006988A1 (en) * | 1994-08-30 | 1996-03-07 | Komatsu Ltd. | Hydraulic circuit for boom cylinder of hydraulic shovel |
| JP4624203B2 (en) * | 2005-07-22 | 2011-02-02 | カヤバ工業株式会社 | Hydraulic control device for construction machinery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644091A (en) * | 2018-06-19 | 2018-10-12 | 姚长水 | A kind of device and its flow rate adjusting method of adjustable quantitative hydraulic pump flow |
| CN109058195A (en) * | 2018-10-30 | 2018-12-21 | 徐工集团工程机械有限公司 | The hydraulic control system for equipment of speedily carrying out rescue work and equipment of speedily carrying out rescue work |
| CN109058195B (en) * | 2018-10-30 | 2024-04-30 | 江苏徐工工程机械研究院有限公司 | Hydraulic control system of rescue equipment and rescue equipment |
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| Publication number | Publication date |
|---|---|
| CN107761804B (en) | 2020-03-27 |
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