CN110469647A - A kind of anti-overspeed hydraulic device for hydrostatic driving vehicle - Google Patents
A kind of anti-overspeed hydraulic device for hydrostatic driving vehicle Download PDFInfo
- Publication number
- CN110469647A CN110469647A CN201910576322.3A CN201910576322A CN110469647A CN 110469647 A CN110469647 A CN 110469647A CN 201910576322 A CN201910576322 A CN 201910576322A CN 110469647 A CN110469647 A CN 110469647A
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- China
- Prior art keywords
- combustion engine
- internal combustion
- fuel tank
- controller
- pump
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention relates to a kind of anti-overspeed hydraulic devices for hydrostatic driving vehicle, the hydrostatic driving vehicle includes internal combustion engine, hydrostatic driving circuit, the hydrostatic driving circuit includes pumping with the electric ratio enclosed of internal combustion engine transmission connection, the anti-overspeed hydraulic device includes controller, hydraulic pump between internal combustion engine and electric ratio enclosed pump is set, proportioning valve, first fuel tank, second fuel tank, the output shaft of the liquid internal combustion engine is connect by the shaft of hydraulic pump with the rotating shaft transmission of electric ratio enclosed pump, first fuel tank is connected by import oil circuit with the hydraulics inlet of hydraulic pump, second fuel tank is connected by exporting oil circuit with the hydraulic output of hydraulic pump, the proportioning valve setting is in outlet oil circuit, the controller is connected with proportioning valve, the electricity ratio enclosed pump drags torque information, and the real-time moment of resistance information of internal combustion engine It is input in controller.Anti- overspeed hydraulic device of the invention, structure is simple, stable and reliable in work, effectively realizes anti-hypervelocity control.
Description
Technical field
The present invention relates to hydrostatic driving vehicular fields, and in particular to a kind of anti-overspeed hydraulic dress for hydrostatic driving vehicle
It sets.
Background technique
The mode of current hydrostatic driving is widely used on the vehicles such as engineering machinery, agricultural machinery, refering to what is shown in Fig. 2,
The internal combustion engine 1 of hydrostatic driving vehicle drives transmission mechanism 3 to rotate by hydrostatic driving circuit 2, and the rotation of transmission mechanism 3, which drives, drives
The rotating shaft transmission connection of the electric ratio enclosed pump 21 in driving wheel 4,1 output shaft of internal combustion engine and hydrostatic driving circuit 2, hydrostatic driving circuit
2 electric proportional hydraulic motor 22 rotation drives transmission mechanism 3.
During descending, refering to what is shown in Fig. 1, vehicle weight mg generates the component Fx for being parallel to road surface, vertical is in road surface
Component Fy；Wherein Fx is consistent with driving direction, after the frictional force Ff (contrary with speed ν at this time) that Fx overcomes Fy to generate,
The trend being accelerated forwardly to make hydrostatic driving vehicle generate.The trend directly causes the electric proportional hydraulic in hydrostatic driving circuit 2
Motor 22 and electric ratio enclosed pump 21 exchange functions, and electric ratio enclosed pumps 21 pairs of applications of internal combustion engines 1 one and drags torque Tf, drags and turn
Torque Tf may directly make internal combustion engine 1 export revolving speed increase, form hypervelocity.
For such situation, the mode of (i.e. driver step on brake traveling) of drive a vehicle in braking is mostly used, currently with reality
Now anti-hypervelocity when slope.But which can make brake(-holder) block sharp wear occur, and then generate the risk of brake failure, cause thing
Therefore.
Summary of the invention
In view of the foregoing deficiencies of prior art, the technical problem to be solved in the present invention is that providing a kind of anti-hypervelocity
Hydraulic device drags torque when can be efficiently against hydrostatic driving vehicle descending, prevents from exceeding the speed limit.
To achieve the above object, the present invention provides a kind of anti-overspeed hydraulic device for hydrostatic driving vehicle, described quiet
Pressure driving vehicle includes internal combustion engine, hydrostatic driving circuit, and the hydrostatic driving circuit includes the electric ratio with internal combustion engine transmission connection
Example enclosed pump, the anti-overspeed hydraulic device include controller, the hydraulic pump being arranged between internal combustion engine and electric ratio enclosed pump,
Proportioning valve, the first fuel tank, the second fuel tank, what the output shaft of the liquid internal combustion engine was pumped by the shaft and electric ratio enclosed of hydraulic pump
Rotating shaft transmission connection, first fuel tank are connected by import oil circuit with the hydraulics inlet of hydraulic pump, and second fuel tank passes through
Outlet oil circuit is connected with the hydraulic output of hydraulic pump, and the proportioning valve setting is in outlet oil circuit, the controller and proportioning valve
It is connected, the electricity ratio enclosed pump drags torque information and the real-time moment of resistance information input of internal combustion engine into controller.
Further, first fuel tank and the second fuel tank are connected by a return oil circuit.
Further, first fuel tank and the second fuel tank can be the fuel tank in hydrostatic driving circuit.
It further, further include one or several load oil circuits, the two-port of the load oil circuit is connected to imported oil
On the road and it is located at proportioning valve both ends, is provided with hydraulic load on the load oil circuit.
It further, further include one or several load oil circuits, the two-port of the load oil circuit is connected to imported oil
On the road and it is located at proportioning valve both ends, is provided with hydraulic load on the load oil circuit.
It further, further include dragging real-time Rotating speed measring mechanism of torque testing agency, internal combustion engine, the real-time torque of internal combustion engine
Testing agency, the controller are turned round in real time with real-time Rotating speed measring mechanism of torque testing agency, internal combustion engine and internal combustion engine is dragged
Square testing agency.
Further, the real-time torque testing agency of the internal combustion engine includes the torque detection being arranged at internal combustion engine output shaft
Element, the torque sensing elements are connected with controller.
Further, the real-time Rotating speed measring mechanism of the internal combustion engine includes the Rotating speed measring being arranged at internal combustion engine output shaft
Element, the Rotating speed measring element are connected with controller.
It is further, described that drag torque testing agency include the be separately positioned on electric ratio enclosed pump two sides oil circuit
One pressure detecting element and second pressure detecting element and the discharge capacity detection member that real time discharge volume is pumped for measuring electric ratio enclosed
Part, the first pressure detecting element, second pressure detecting element and discharge capacity detecting element are all connected with controller.
As described above, anti-overspeed hydraulic device of the present invention, has the advantages that
By the way that controller, hydraulic pump, proportioning valve, the first fuel tank, the second fuel tank is arranged, when hydrostatic driving vehicle descending, control
The real-time moment of resistance information for dragging torque information and internal combustion engine that device processed is pumped according to the electric ratio enclosed of input, comparative analysis
Torque information and real-time moment of resistance information are dragged, when dragging torque excessive, reaches and needs to dragging what torque controlled to want
When asking, controller issues instruction to proportioning valve, controls the open degree of proportioning valve, adjusts the hydraulic pressure in outlet oil circuit extremely with this
A certain required value, and then a moment of resistance is generated at the shaft of hydraulic pump, the moment of resistance is internal for overcoming electric ratio enclosed pump
What combustion engine generated drags torque, to avoid dragging torque that internal combustion engine is pulled to cause to exceed the speed limit, so that hydrostatic driving vehicle is slow
Operation, realizes anti-hypervelocity function.Anti- overspeed hydraulic device of the present invention, structure is simple, and the operation is stable is effective, can be effective
Influence of the support torque in hydrostatic driving circuit to internal combustion engine when ground reduces hydrostatic driving vehicle normal descending, under realizing that vehicle is grown
Anti- hypervelocity control when long slope, abrupt slope.
Detailed description of the invention
Stress diagram when Fig. 1 is hydrostatic driving vehicle descending.
Fig. 2 is the structural schematic diagram of speed control unit of the invention.
Component label instructions
1 internal combustion engine
2 hydrostatic driving circuits
21 electric ratio enclosed pumps
22 electric proportional hydraulic motors
3 transmission mechanisms
4 driving wheels
5 hydraulic pumps
6 controllers
7 proportioning valves
8 first fuel tanks
9 import oil circuits
10 outlet oil circuits
11 second fuel tanks
12 load oil circuits
13 hydraulic loads
14 Rotating speed measring elements
15 torque sensing elements
16 first pressure detecting elements
17 second pressure detecting elements
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that structure, ratio, size etc. that this specification attached drawing is drawn, only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size can be produced not influencing the present invention
Under raw effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can cover.Together
When, the term of cited such as "upper", "lower", "left", "right", " centre " in this specification, it is clear to be merely convenient to narration,
Rather than to limit the scope of the invention, relativeness is altered or modified, under the content of no substantial changes in technology,
When being also considered as the enforceable scope of the present invention.
As shown in Fig. 2, the present invention provides a kind of anti-overspeed hydraulic device for hydrostatic driving vehicle, hydrostatic driving vehicle
Include internal combustion engine 1, transmission mechanism 3 and connect internal combustion engine 1 and transmission mechanism 3 hydrostatic driving circuit 2, hydrostatic driving return
Road 2 includes the electric ratio enclosed pump 21 being sequentially connected with internal combustion engine 1, and anti-overspeed hydraulic device includes controller 6, is arranged in internal combustion
Hydraulic pump 5, proportioning valve 7, the first fuel tank 8, the second fuel tank 11 between machine 1 and electric ratio enclosed pump 21, the output of liquid internal combustion engine 1
Axis is connect by the shaft of hydraulic pump 5 with the rotating shaft transmission of electric ratio enclosed pump 21, and the first fuel tank 8 passes through import oil circuit 9 and liquid
The hydraulics inlet of press pump 5 is connected, and the second fuel tank 11 is connected by exporting oil circuit 10 with the hydraulic output of hydraulic pump 5, and proportioning valve 7 is set
It sets in outlet oil circuit 10, controller 6 is connected with proportioning valve 7, and electric ratio enclosed pump 21 drags torque information and internal combustion engine
1 real-time moment of resistance information input is into controller 6.
The working principle of anti-overspeed hydraulic device of the invention are as follows: when hydrostatic driving normal vehicle operation, proportioning valve 7 is in
Open state, internal combustion engine 1 drive the shaft rotation of hydraulic pump 5, and hydraulic pump 5 drives the hydraulic oil in the first fuel tank 8 via import
Oil circuit 9 enters hydraulic pump 5, then enters the second fuel tank 11 via outlet oil circuit 10.When hydrostatic driving vehicle descending, controller 6
According to the real-time moment of resistance information for dragging torque information and internal combustion engine 1 of the electric ratio enclosed of input pump 21, comparative analysis is dragged
Torque information and real-time moment of resistance information reach the requirement needed to dragging torque to be controlled when dragging torque excessive
When, controller 6 issues instruction to proportioning valve 7, controls the open degree of proportioning valve 7, adjusts the hydraulic pressure in outlet oil circuit 10 with this
Power generates a moment of resistance to a certain required value at the shaft of hydraulic pump 5, and the size of the moment of resistance can be according to specific need
It adjusts, what which was used to that 21 pairs of internal combustion engines 1 of electric ratio enclosed pump to be overcome to generate drags torque, to avoid dragging torque
Internal combustion engine 1 is pulled to cause to exceed the speed limit, so that the slow operation of hydrostatic driving vehicle, realizes anti-hypervelocity function.Wherein, controller 6 can
To select existing a variety of instrument and meters with data collection process and control function, above-mentioned function can be realized.
Anti- overspeed hydraulic device of the present invention, structure is simple, and the operation is stable is effective, can effectively reduce static pressure drive
Influence of the support torque in hydrostatic driving circuit 2 to internal combustion engine 1 when motor-car normal descending, can be to greatly improve vehicle safety superfluous
In the case where remaining, realize speed control when the long lower long slope of vehicle, abrupt slope, fill up anti-hypervelocity when the type vehicle descending operating condition
Blank.
As preferred design, as shown in Fig. 2, in the present embodiment, a return oil circuit (attached to be not shown in the figure) can be used
First fuel tank 8 is connected with the second fuel tank 11, the hydraulic oil of the second fuel tank 11 can be back to the first fuel tank 8, form one
Circulating oil path increases working efficiency.First fuel tank 8 and the second fuel tank 11 can be separately provided, and also can use hydrostatic driving vehicle
The existing fuel tank in hydrostatic driving circuit 2, make full use of original tank equipment, reduce the use of tank equipment.
As preferred design, as shown in Fig. 2, in the present embodiment, one or several can be added according to the actual situation
Oil circuit 12 is loaded, the two-port of load oil circuit 12 is connected on import oil circuit 9 and is located at 7 both ends of proportioning valve, loads on oil circuit 12
It is provided with hydraulic load 13, hydraulic load 13 can be the external equipment of hydraulic-driven.It can according to need, meeting to hydraulic
In the case that the shaft of pump 5 generates desired resistive force square, the section hydraulic oil in import oil circuit 9 is flowed in load oil circuit 12,
For driving hydraulic load 13, the hydraulic power of hydraulic pump 5 is adequately utilized, economic benefits are provided.
As preferred design, as shown in Fig. 2, further including dragging torque testing agency, internal combustion engine real-time in the present embodiment
The real-time torque testing agency of Rotating speed measring mechanism, internal combustion engine, controller 6 and drags the real-time revolving speed of torque testing agency, internal combustion engine
Testing agency and the real-time torque testing agency of internal combustion engine, will be dragged in time with this real-time revolving speed of torque, internal combustion engine and
The real-time output torque of internal combustion engine is input in controller 6, and controller 6 is obtained according to the real-time revolving speed of internal combustion engine and combustion engine mechanical characteristic
It to the real-time moment of resistance of internal combustion engine, is handled by the calculating analysis of controller 6, according to the real-time moment of resistance square of internal combustion engine and drags and turn power
Square, when internal combustion engine also has other loads, while the loading moment for also needing to be loaded according to other, timely adjust proportioning valve
7, the moment of resistance that the satisfaction that 5 shaft of hydraulic pump generates is needed with this adjustment in time.
Preferably, as shown in Fig. 2, in the present embodiment, the real-time torque testing agency of internal combustion engine 1 includes being arranged in internal combustion engine
Torque sensing elements 15 at 1 output shaft, torque sensing elements 15 are connected with controller 6, and torque sensing elements 15 directly measure
To the real-time output torque of internal combustion engine 1.The real-time Rotating speed measring mechanism of internal combustion engine 1 includes being arranged at 1 output shaft of internal combustion engine to turn
Fast detecting element 14, Rotating speed measring element 14 are connected with controller 6, and Rotating speed measring element 14 directly measures the output of internal combustion engine 1
The revolving speed of axis is input in controller 6.Dragging torque testing agency includes being separately positioned on electric ratio enclosed to pump 21 two sides oil circuits
On first pressure detecting element 16 and second pressure detecting element 17 and pump 21 real time discharge volumes for measuring electric ratio enclosed
Discharge capacity detecting element, first pressure detecting element 16, second pressure detecting element 17 and discharge capacity detecting element and controller 6 are all
It is connected.First pressure detecting element 16 and second pressure detecting element 17 measure respectively obtains 21 two sides oil circuits of electric ratio enclosed pump
In pressure P1 and P2, and be input in controller 6, discharge capacity detecting element measures electric ratio enclosed and pumps 21 real time discharge volume Q, and
It is input in controller 6, for controller 6 according to P1, P2 and Q, electric ratio enclosed pump 21 is calculated drags torque information.When
So, torque testing agency, the real-time Rotating speed measring mechanism of internal combustion engine, the real-time torque testing agency of internal combustion engine can also use other
Detection device.
From the foregoing, it will be observed that the anti-overspeed hydraulic device in embodiment, structure is simple, and the operation is stable is effective, can effectively subtract
The influence of the support torque in hydrostatic driving circuit 2, reduces the influence to internal combustion engine 1, prevents when small hydrostatic driving vehicle normal descending
Only exceed the speed limit.The hydraulic power that hydraulic pump 5 can adequately be utilized simultaneously, improves economic benefits, furthermore can use hydrostatic driving vehicle
Fuel tank, simplify structure.Long lower long slope, abrupt slope can be realized in the case where greatly improving hydrostatic driving vehicle safety redundancy
When speed control, fill up the blank of anti-hypervelocity when the type vehicle descending operating condition.
In conclusion invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of anti-overspeed hydraulic device for hydrostatic driving vehicle, the hydrostatic driving vehicle include internal combustion engine (1), static pressure
Driving circuit (2), the hydrostatic driving circuit (2) includes the electric ratio enclosed pump (21) with internal combustion engine (1) transmission connection, special
Sign is: the anti-overspeed hydraulic device includes controller (6), setting between internal combustion engine (1) and electric ratio enclosed pump (21)
Hydraulic pump (5), proportioning valve (7), the first fuel tank (8), the second fuel tank (11), the output shaft of the liquid internal combustion engine (1) passes through liquid
The shaft of press pump (5) is connect with the rotating shaft transmission of electric ratio enclosed pump (21), and first fuel tank (8) passes through import oil circuit (9)
Be connected with the hydraulics inlet of hydraulic pump (5), second fuel tank (11) by outlet oil circuit (10) and hydraulic pump (5) it is hydraulic go out
Mouth is connected, and proportioning valve (7) setting is in outlet oil circuit (10), and the controller (6) is connected with proportioning valve (7), the electricity
Ratio enclosed pump (21) drags torque information and the real-time moment of resistance information input of internal combustion engine (1) in controller (6).
2. anti-overspeed hydraulic device according to claim 1, it is characterised in that: first fuel tank (8) and the second fuel tank
(11) it is connected by a return oil circuit.
3. anti-overspeed hydraulic device according to claim 1, it is characterised in that: first fuel tank (8) and the second fuel tank
It (11) can be the fuel tank of hydrostatic driving circuit (2).
4. anti-overspeed hydraulic device according to claim 1, it is characterised in that: further include one or several load oil circuits
(12), the two-port of load oil circuit (12) is connected on import oil circuit (9) and is located at proportioning valve (7) both ends, the load
Hydraulic load (13) are provided on oil circuit (12).
5. anti-overspeed hydraulic device according to claim 1, it is characterised in that: further include dragging torque testing agency, interior
The real-time Rotating speed measring mechanism of combustion engine, the real-time torque testing agency of internal combustion engine, the controller (6) and drag torque testing agency,
The real-time Rotating speed measring mechanism of internal combustion engine and the real-time torque testing agency of internal combustion engine.
6. anti-overspeed hydraulic device according to claim 5, it is characterised in that: the real-time torque testing agency of internal combustion engine
Including the torque sensing elements (15) at internal combustion engine output shaft, the torque sensing elements (15) and controller (6) phase is arranged in
Even.
7. anti-overspeed hydraulic device according to claim 5, it is characterised in that: the real-time Rotating speed measring mechanism of internal combustion engine
Including the Rotating speed measring element (14) being arranged at internal combustion engine (1) output shaft, the Rotating speed measring element (14) and controller (6)
It is connected.
8. anti-overspeed hydraulic device according to claim 5, it is characterised in that: described to drag torque testing agency including dividing
First pressure detecting element (16) and second pressure detecting element on the oil circuit of (21) two sides She Zhi not be pumped in electric ratio enclosed
(17) and for measuring electric ratio enclosed the discharge capacity detecting element of (21) real time discharge volume, the first pressure detecting element are pumped
(16), second pressure detecting element (17) and discharge capacity detecting element are all connected with controller (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576322.3A CN110469647A (en) | 2019-06-28 | 2019-06-28 | A kind of anti-overspeed hydraulic device for hydrostatic driving vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576322.3A CN110469647A (en) | 2019-06-28 | 2019-06-28 | A kind of anti-overspeed hydraulic device for hydrostatic driving vehicle |
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| Publication Number | Publication Date |
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| CN110469647A true CN110469647A (en) | 2019-11-19 |
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ID=68507479
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910576322.3A Pending CN110469647A (en) | 2019-06-28 | 2019-06-28 | A kind of anti-overspeed hydraulic device for hydrostatic driving vehicle |
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Application publication date: 20191119 |
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