CN111152838A - Hydraulic integrated control device for mine car steering system and box body lifting system - Google Patents
Hydraulic integrated control device for mine car steering system and box body lifting system Download PDFInfo
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- CN111152838A CN111152838A CN201811326255.1A CN201811326255A CN111152838A CN 111152838 A CN111152838 A CN 111152838A CN 201811326255 A CN201811326255 A CN 201811326255A CN 111152838 A CN111152838 A CN 111152838A
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- oil
- lifting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
- B62D5/063—Pump driven by vehicle engine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
- B60P1/162—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms the hydraulic system itself
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
Abstract
The invention discloses a hydraulic integrated control device for a steering system and a box body lifting system of a mine car. According to the invention, pumps with different flow rates can be selected according to the rotating speed of the engine, so that unnecessary power loss is effectively saved; meanwhile, the control system can comprehensively control the steering gear and the lifting oil cylinder, can ensure the normal work of the steering gear and the lifting oil cylinder, and avoids potential safety hazards such as failure of the steering gear, too fast return stroke of the lifting oil cylinder and the like under emergency conditions.
Description
Technical Field
The invention relates to the technical field of mine car control, in particular to a hydraulic integrated control device for a mine car steering system and a box body lifting system.
Background
The mine car is mainly suitable for engineering tunneling, construction and simple matching and high-efficiency slag-tapping transportation equipment for metallurgy, mines, coal mines, railways, highway tunnels, hydraulic culverts, underground mine drifts, military culverts and the like. With the rapid development of national economy, the leap and leap of mining enterprises is pulled, and particularly in recent years, large and medium-sized mining enterprises such as bamboo shoots in spring after rain are more and more. The demand for mine cars, the primary carrying equipment in the mining industry, is also increasing.
The existing steering gear of the mine car is mainly driven by a high-flow pump, mainly because when the mine car is at a lower speed, higher hydraulic pressure is required to drive the steering; however, when the rotation speed of the engine of the mine car is in a high state, the control of the steering gear can be completed only by low hydraulic pressure, and a large amount of unnecessary power loss is caused by continuously using a large-flow pump, so that the operation cost is increased.
In addition, the lifting operation of the box body of the existing mine car is controlled by an independent lifting hydraulic system, so that the energy consumption is high, and the return speed cannot be controlled by the existing lifting hydraulic system, so that the efficiency is low.
Therefore, it is necessary to develop a hydraulic system combining steering and lifting.
Disclosure of Invention
The invention aims to provide a hydraulic integrated control device of a bogie system and a box body lifting system of a mine car, which can select pumps with different flow rates according to the rotating speed of an engine, thereby effectively saving unnecessary power loss; meanwhile, the control system can comprehensively control the steering gear and the lifting oil cylinder, can ensure the normal work of the steering gear and the lifting oil cylinder, and avoids potential safety hazards such as failure of the steering gear, too fast return stroke of the lifting oil cylinder and the like under emergency conditions.
In order to achieve the purpose, the invention has the advantages that:
the hydraulic integrated control device for the bogie system and the box body lifting system of the mine car comprises a large-flow pump, a small-flow pump, a reversing valve, a lifting confluence valve, a steering gear, a balance valve group, a lifting oil cylinder, an oil tank and a motor for driving the large-flow pump and the small-flow pump;
the reversing valve is provided with an oil inlet P, P1 and an oil outlet A, B, C, the lifting flow-combining valve is provided with an oil inlet E, D, an oil outlet T1 and an oil port F, G, the balance valve group is provided with oil ports P2 and H and oil outlets T2 and T3, and the steering gear is provided with an oil inlet J and an internal shunting oil return port T4;
the oil inlet P, P1 is respectively connected with the outlet of the large-flow pump and the outlet of the small-flow pump; the oil outlet A, B, C is respectively connected with the oil inlet J, the oil inlet D and the oil inlet E, the oil port F is connected with the oil inlet J, the oil port G is connected with the oil port P2 and the oil outlet T1, the oil outlets T1, T2, T3 and T4 are connected to an oil tank, and the oil port H is an oil inlet and an oil outlet of the lifting oil cylinder;
the reversing valve is connected with a switching oil path for receiving a rotating speed signal of an engine, when the engine is in a low-speed state, the oil inlet P is connected with the oil outlet A, B, the oil inlet P1 is connected with the oil outlet C, when the engine is in a high-speed state, the oil inlet P is connected with the oil outlet C, and the oil inlet P1 is connected with the oil outlet B;
the lifting confluence valve is provided with an upper position and a lower position, the oil inlet D is connected with the oil port F in the lower position, the oil inlet E is connected with the oil port G, the oil inlet E and the oil inlet D are converged and output to the oil port P2 from the oil port G in the upper position, the confluence of the oil inlet E and the oil inlet D is also connected with the oil port F, and a first adjustable throttle valve is arranged on a liquid path connected with the oil port F;
the balance valve group is provided with a left, a middle and a right three positions, and when the balance valve group is in the middle position, the oil port P2 is connected to the oil outlet T3; when the lifting oil cylinder is in a left position, the oil port H is connected with the oil outlet T2 and the oil port P2 to form a lifting oil cylinder oil return liquid path, and a first hydraulic lock and a second adjustable throttle valve are arranged on the lifting oil cylinder oil return liquid path to form lifting oil cylinder oil return primary control; and when the lifting oil cylinder is in a right position, the oil port P2 is connected with the oil port H to form an oil inlet liquid path of the lifting oil cylinder.
The specific working principle of the invention is as follows:
the diverter is internally provided with the internal branch port T4, however, when the engine is in a high-speed state, the branch port T4 cannot meet the liquid discharge requirement, the problems of abnormal sound, shaking and the like are caused, unnecessary power loss is caused, and therefore, the diverter needs to be provided with a function of selecting a pump according to the rotating speed.
When the engine is in a low-speed state, the large-flow pump supplies oil to the steering gear through the PAJ liquid path and the PBDFJ liquid path, the small-flow pump supplies oil to the lifting oil cylinder through the P1CEG, and at the moment, if the lifting oil cylinder does not need to act, oil of the small-flow pump returns to the oil tank through the GP2T 3;
when the engine is in a high-speed state, the large-flow pump supplies oil to the lifting oil cylinder through PCEG, the small-flow pump supplies oil to the steering gear through P1BDF, and at the moment, if the lifting oil cylinder does not need to act, oil of the large-flow pump returns to the oil tank through GP2T 3;
the lifting oil cylinder controls oil inlet and outlet through the balance valve group, when the oil does not need to act, the oil returns to the oil cylinder through P2T3 at the middle position, and when the oil needs to enter, the oil enters the oil cylinder through P2H at the right position; when oil needs to be discharged, oil is discharged through the HP2GT1 and the HT2 at the left position, and a first hydraulic lock and a second adjustable throttle valve are arranged on an oil return liquid path of the lifting oil cylinder to form lifting oil cylinder oil return primary control;
when the lifting oil cylinder is heavy in load or needs to be quickly lifted, the lifting confluence valve is adjusted to be at an upper position, the large-flow pump and the small-flow pump are converged in the lifting confluence valve and supply oil to the lifting oil cylinder through the oil port G together, and meanwhile, the converged oil can flow out from the oil port F through the first adjustable throttle valve to supply oil to the steering gear continuously;
when the system stops working, oil in the steering gear enters the upper position of the lifting confluence valve through the oil port F and returns to the oil tank through the oil outlet T1 and an oil outlet T3 in the middle position of the balance valve group.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the output of the large-flow pump and the small-flow pump is controlled by the reversing valve, the large-flow pump supplies oil to the steering gear at low speed, and the small-flow pump supplies oil to the steering gear at high speed, so that the stable requirement of the steering gear on the oil flow can be well solved, the power can be saved, the heat is reduced, the steering of the steering gear is more stable, and the abnormal problems of abnormal sound, shaking and the like caused by liquid discharge due to too much oil which is directly supplied by the large-flow pump and generated at high speed due to shunting of the steering gear can not be met;
2. according to the invention, the oil inlet and outlet and the stop operation of the lifting oil cylinder are controlled through the balance valve group, the oil port H of the balance valve group timely enables the oil inlet of the lifting oil cylinder to be the oil outlet of the lifting oil cylinder, the balance valve group ensures the working safety of the lifting oil cylinder, the oil port H is sealed in the middle position, the lifting oil cylinder can be kept in a static state under the emergency conditions of oil pipe burst, pump failure and the like, the lifting oil cylinder can not fall back quickly and the like, and the potential safety hazard is avoided;
3. when the balance valve group is in the left position, oil in the lifting oil cylinder passes through the first hydraulic lock and the second adjustable throttle valve to finish oil outlet operation, the first hydraulic lock and the second adjustable throttle valve can control the oil outlet speed of the lifting oil cylinder, the over-high or over-low return speed of the lifting oil cylinder is avoided, the first-high and second-low return speed is realized, and potential safety hazards are avoided;
4. when the lifting oil cylinder works, the branch of the confluence of the large-flow pump and the small-flow pump supplies oil to the steering gear through the first adjustable throttle valve, so that the steering action is prevented from losing during lifting, the steering system does not fail in the unloading process, a sudden emergency state is treated, and the driving safety is ensured;
further improvements of the invention are put into the following:
furthermore, a second hydraulic lock is arranged between the oil port G and the oil outlet T1 to form secondary control of oil return of the lifting oil cylinder.
By adopting the scheme, in the oil return process of the lifting oil cylinder, the second-stage control is performed on the oil return through the second hydraulic lock arranged on the liquid path GT1, the condition that the oil return speed of the lifting oil cylinder is too high is avoided, and the driving safety is ensured.
Further, the hydraulic oil storage device comprises a spring type energy storage device, wherein the spring type energy storage device is provided with an oil port J1, and an oil port J1 is arranged on a liquid path connecting the oil port F and the main oil inlet J.
By adopting the scheme, the spring type energy accumulator charges energy when the oil supply hydraulic pressure of the steering gear is high, and supplies oil (when the lifting oil cylinder works) when the oil supply hydraulic pressure of the steering gear is low, so that the effect of stabilizing the flow is achieved, and the normal work of the steering gear is ensured; in addition, when emergency such as pump failure and pipeline damage occurs, the spring type energy accumulator can ensure that the steering gear can normally run for a certain period, and the driving safety degree is improved.
When the system stops working, high-pressure oil in the spring type energy accumulator enters the upper position of the lifting confluence valve through the oil port F and returns to the oil tank through the oil outlet T1 and the oil outlet T3 in the middle position of the balance valve group.
Further, lift hydro-cylinder tip is equipped with gravity sensor, and gravity sensor with balanced valves electricity is connected, when gravity sensor detected lifting pressure and is greater than the setting value scope, gravity sensor control balanced valves adjusts to meso position and left position in proper order, the cooperation control of first hydraulic pressure lock, the adjustable choke valve of second and second hydraulic pressure lock the shake of lift hydro-cylinder.
Through adopting above-mentioned scheme, when lifting cylinder promotion box during operation, internal pressure continuously reduces, there is corresponding relation between hydro-cylinder top power and the lifting angle, detect hydro-cylinder top power through gravity sensor, if exceed the settlement error, then probably the adhesion has a large amount of earth or heavy object etc. on the box, gravity sensor can control the balanced valves and adjust to meso position and left position in proper order this moment, will control lifting cylinder and keep, later control lifting cylinder oil return, first hydraulic pressure lock on the oil return liquid way, form the turbulent flow under the cooperation of the adjustable choke valve of second and second hydraulic pressure lock, lead to the shake of piston and box, thereby shake out heavy object and earth.
The system safety valve is characterized by further comprising a system safety valve, wherein an inlet of the system safety valve is respectively connected with an outlet of the large-flow pump and an outlet of the small-flow pump, a check valve is further arranged between the outlet of the small-flow pump and the inlet of the system safety valve, and an outlet of the system safety valve is connected with the oil tank to form primary pressure relief protection.
By adopting the scheme, the system safety valve can release pressure for a liquid path when the pressure of the pump is overlarge, and the system safety is ensured.
The steering gear safety valve further comprises a steering gear safety valve, wherein the inlet of the steering gear safety valve is connected with the oil inlet liquid path of the steering gear, and the outlet of the steering gear safety valve is connected with an oil tank to form secondary pressure relief protection.
By adopting the scheme, the safety valve of the steering gear can release pressure for the liquid path when the oil supply pressure of the steering gear is overlarge, and the working safety of the steering gear is ensured.
Furthermore, the reversing valve further comprises a rotating speed signal converter, and the reversing valve receives an engine ECU signal through the rotating speed signal converter.
Further, a return filter is further arranged on the oil tank, the return filter is provided with an oil inlet K1 and an oil outlet K2, the oil outlet T3 or T4 is connected with the oil inlet K1, and the oil outlet K2 is connected with the oil tank.
By adopting the scheme, the return filter can filter return oil, so that cleanness of oil in the oil tank is ensured; one of the oil outlets T3 or T4 is selected to be connected with K1, and the oil outlet T3 or T4 is mainly used for supplying oil to a steering gear by a large-flow pump, and when a small-flow pump does not perform action, the oil in an oil tank can be filtered online in real time, so that the whole tank of oil is clean, and other loops can be directly connected with an oil return port without passing through a filter element to effectively reduce oil return pressure.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of a in fig. 1.
Fig. 3 is a partially enlarged schematic view of b in fig. 1.
Fig. 4 is a schematic lifting diagram of an embodiment of the present invention.
Shown in the figure:
1. a high-flow pump; 2. a small flow pump; 3. a diverter valve; 4. lifting the confluence valve; 5. a diverter; 6. a balancing valve bank; 7. lifting the oil cylinder; 8. an oil tank; 9. a first adjustable throttle valve; 10. a first hydraulic lock; 11. a second adjustable throttle valve; 12. a second hydraulic lock; 13. a spring-loaded accumulator; 14. a system safety valve; 15. a one-way valve; 16. a diverter safety valve; 17. returning to the filter; 18. a rotational speed signal converter; 19. a motor; A. and (5) lifting the angle.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of a in fig. 1.
Fig. 3 is a partially enlarged schematic view of b in fig. 1.
Fig. 4 is a schematic lifting diagram of an embodiment of the present invention.
As shown in fig. 1 to 4, the hydraulic integrated control device for a bogie system and a box body lifting system of a mine car provided by the embodiment comprises a large-flow pump 1, a small-flow pump 2, a reversing valve 3, a lifting confluence valve 4, a steering gear 5, a balance valve group 6, a lifting oil cylinder 7, an oil tank 8 and a motor 19 for driving the large-flow pump 1 and the small-flow pump 2.
The displacement of the large-flow pump 1 is not less than 40CC, and the displacement of the small-flow pump 2 is not more than 20 CC.
The reversing valve 3 is provided with an oil inlet P, P1 and an oil outlet A, B, C.
The lifting flow-merging valve 4 is provided with an oil inlet E, D, an oil port F, T1 and an oil port G.
The balancing valve group 6 is provided with an oil port P2, oil outlets T2, T3 and an oil port H.
The diverter 5 is provided with an oil inlet J and an internal diverter return T4.
The outlet of the large flow pump 1 is connected with an oil inlet P, and the outlet of the small flow pump 2 is connected with an oil inlet P1; the oil outlet A, B, C is respectively connected with the oil inlet J, the oil inlet D and the oil inlet E, the oil port F is connected with the oil inlet J, the oil port G is connected with the oil port P2 and the oil port T1, the oil outlets T1, T2, T3 and T4 are connected to the oil tank 8, and the oil port H is an oil inlet and outlet of the lifting oil cylinder 7.
The reversing valve 3 receives an engine speed signal to switch an oil way, when the engine is in a low-speed state, an oil inlet P is connected with an oil outlet A, B, an oil inlet P1 is connected with an oil outlet C, when the engine is in a high-speed state, the oil inlet P is connected with the oil outlet C, and an oil inlet P1 is connected with an oil outlet B;
the lifting confluence valve 4 is provided with an upper position and a lower position, an oil inlet D is connected with an oil port F in the lower position, an oil inlet E is connected with an oil port G, the oil inlet E and the oil inlet D are converged in the upper position and supply oil to the lifting oil cylinder 7 through the oil port G, the converged oil can flow out from the oil port F through a first adjustable throttle valve 11 and continue to supply oil to the steering gear 5, and a first adjustable throttle valve 9 is arranged on a liquid path where the converged oil port F is connected;
the balance valve group 6 is provided with a left, middle and right three positions, and when the balance valve group is in the middle position, the oil port P2 is connected to the oil outlet T3; when the lifting oil cylinder 7 is in a left position, the oil port H is connected with the oil outlet T2 and the oil port P2 to form an oil return liquid path of the lifting oil cylinder 7, and a first hydraulic lock 10 and a second adjustable throttle valve 11 are arranged on the oil return liquid path of the lifting oil cylinder 7 to form oil return primary control of the lifting oil cylinder 7; and when the lifting oil cylinder 7 is in the right position, the oil port P2 is connected with the oil port H to form an oil inlet path of the lifting oil cylinder 7.
The specific working principle of the invention is as follows:
when the engine is in a low-speed state, the large-flow pump 1 supplies oil to the steering gear 5 through an PAJ liquid path and a PBDFJ liquid path, the small-flow pump 2 supplies oil to the lifting oil cylinder 7 through P1CEG, and at the moment, if the lifting oil cylinder 7 does not need to act, oil of the small-flow pump 2 returns to the oil tank 8 through GP2T 3;
when the engine is in a high-speed state, the large-flow pump 1 supplies oil to the lifting oil cylinder 7 through PCEG, the small-flow pump 2 supplies oil to the steering gear 5 through P1BDF, and at the moment, if the lifting oil cylinder 7 does not need to act, oil of the large-flow pump 1 returns to the oil tank 8 through GP2T 3;
the lifting oil cylinder 7 is controlled to enter and exit oil through the balance valve group 6, when the oil does not need to act, the oil returns to the oil tank 8 through the P2T3 at the middle position, and when the oil needs to enter, the oil enters the lifting oil cylinder 7 through the P2H at the right position; when oil needs to be discharged, oil is discharged through the left HP2GT1 and the HT2, and a first hydraulic lock 10 and a second adjustable throttle valve 11 are arranged on an oil return liquid path of the lifting oil cylinder 7 to form oil return primary control of the lifting oil cylinder 7;
when the lifting oil cylinder 7 is heavy in load or needs to be quickly lifted, the lifting confluence valve 4 is adjusted to be at an upper position, the large flow pump 1 and the small flow pump 2 are converged in the lifting confluence valve 4 and supply oil to the lifting oil cylinder 7 together through the oil port G, and meanwhile, the converged oil can flow out of the oil port F through the first adjustable throttle valve 9 to supply oil to the steering gear 5 continuously;
when the system stops working, oil in the steering gear 5 enters the upper position of the lifting confluence valve 4 through the oil port F and returns to the oil tank 8 through the oil outlet T1 and the oil outlet T3 in the middle position of the balance valve group 6.
Furthermore, in the present embodiment, a second hydraulic lock 12 is disposed between the oil port G and the oil outlet T1 to form a second-level control of oil return of the lift cylinder 7.
In the oil return process of the lifting oil cylinder 7, the second hydraulic lock 12 is arranged on the liquid path GT1 to perform secondary control on the oil return, so that the over-high oil return speed of the lifting oil cylinder 7 is avoided, and the driving safety is ensured.
Further, the present embodiment is further provided with a spring type energy accumulator 13, the spring type energy accumulator 13 is provided with an oil port J1, and the oil port J1 is arranged on a liquid path connecting the oil port F and the main oil inlet J.
The spring type energy accumulator 13 charges energy when the oil supply hydraulic pressure of the steering gear 5 is high, and supplies oil (when the lifting oil cylinder works) when the oil supply hydraulic pressure of the steering gear 5 is low, so that the effect of stabilizing the flow is achieved, and the normal work of the steering gear 5 is ensured; in addition, when emergency such as pump failure and pipeline damage occurs, the spring type energy accumulator 13 can ensure that the steering gear 5 can normally run for a certain period, and the driving safety degree is improved.
When the system stops working, high-pressure oil in the spring type accumulator 13 enters the upper position of the lifting confluence valve 4 through the oil port F and returns to the oil tank 8 through the oil outlet T1 and the oil outlet T3 in the middle position of the balance valve group 6.
Furthermore, a gravity sensor (not shown in the figure) is arranged at the end of the lifting oil cylinder 7 and is electrically connected with the balance valve group 6, when the gravity sensor detects that the lifting pressure is larger than a set value range, the gravity sensor controls the balance valve group 6 to be adjusted to the middle position and the left position in sequence, and the first hydraulic lock 10, the second adjustable throttle valve 11 and the second hydraulic lock 12 are matched to control the lifting oil cylinder 7 to shake.
When the lifting oil cylinder 7 lifts the box body to work, the internal pressure is continuously reduced, a corresponding relation exists between the top end force of the oil cylinder and the lifting angle, the top end force of the oil cylinder is detected through the gravity sensor, if the top end force exceeds a set error, a large amount of soil or heavy objects and the like are possibly adhered to the box body, the gravity sensor can control the balance valve group 6 to be sequentially adjusted to a middle position and a left position at the moment, the lifting oil cylinder 7 is controlled to be kept, oil return of the lifting oil cylinder 7 is controlled later, turbulent flow is formed under the cooperation of the first hydraulic lock 10, the second adjustable throttle valve 11 and the second hydraulic lock 12 on an oil return liquid path, and the piston and the box body are shaken, so.
As shown in fig. 4, when a heavy object (such as clay) in the tank cannot be discharged, and under the condition of a certain lifting angle a, when the gravity sensor receives a range in which the lifting pressure is greater than a set value, the balance valve group 6 is controlled to be sequentially switched to the middle position and the left position, then the lifting oil cylinder 7 flows back under the action of the weight of the tank, a turbulent flow is formed under the cooperation of the first hydraulic lock 10, the second adjustable throttle valve 11 and the second hydraulic lock 12 on the oil return liquid path, and the lifting oil cylinder 7 is controlled to shake to discharge the heavy object.
Further, the present embodiment is further provided with a system safety valve 14, an inlet of the system safety valve 14 is connected to an outlet of the large flow pump 1 and an outlet of the small flow pump 2, respectively, a check valve 15 is further disposed between the outlet of the small flow pump 2 and the inlet of the system safety valve 14, and an outlet of the system safety valve 14 is connected to the oil tank 8 to form a primary pressure relief protection.
The system safety valve 14 can release pressure for a liquid path when the pressure of the pump is overlarge, and the system safety is ensured.
Further, this embodiment still is equipped with steering gear relief valve 16, and steering gear relief valve 16 import is connected with the oil feed liquid way of steering gear 5, and the export is connected with oil tank 8 and is constituted second grade pressure release protection.
The diverter safety valve 16 can release pressure for a liquid path when the oil supply pressure of the diverter 5 is too high, and the working safety of the diverter 5 is ensured.
Further, the present embodiment is also provided with a rotational speed signal converter 18, and the selector valve 3 receives an engine ECU signal through the rotational speed signal converter 18, thereby switching the oil passages according to the engine rotational speed.
Further, the oil tank 8 is also provided with a return filter 17, the return filter 17 is provided with an oil inlet K1 and an oil outlet K2, the oil outlet T3 or T4 is connected with the oil inlet K1, and the oil outlet K2 is connected with the oil tank 8.
The return filter 17 can filter return oil, so that cleanness of oil in the oil tank 8 is guaranteed; one of the oil outlets T3 or T4 is selected to be connected with K1, and the oil outlet T3 or T4 is mainly used for supplying oil to the steering gear 5 by the large-flow pump 1, and when the small-flow pump 2 does not perform any action, the oil in the oil tank 8 can be filtered online in real time, so that the whole tank of oil is clean, other loops can be directly connected with the oil return port, the oil return pressure is effectively reduced without a filter element, and the system is further ensured not to be in system failure caused by oil pollution.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. The hydraulic integrated control device for the bogie system and the box body lifting system of the mine car is characterized by comprising a large-flow pump, a small-flow pump, a reversing valve, a lifting confluence valve, a steering gear, a balance valve group, a lifting oil cylinder, an oil tank and a motor for driving the large-flow pump and the small-flow pump;
the reversing valve is provided with an oil inlet P, P1 and an oil outlet A, B, C, the lifting flow-combining valve is provided with an oil inlet E, D, an oil outlet T1 and an oil port F, G, the balance valve group is provided with oil ports P2 and H and oil outlets T2 and T3, and the steering gear is provided with an oil inlet J and an internal shunting oil return port T4;
the oil inlet P, P1 is respectively connected with the outlet of the large-flow pump and the outlet of the small-flow pump; the oil outlet A, B, C is respectively connected with the oil inlet J, the oil inlet D and the oil inlet E, the oil port F is connected with the oil inlet J, the oil port G is connected with the oil port P2 and the oil outlet T1, the oil outlets T1, T2, T3 and T4 are connected to an oil tank, and the oil port H is an oil inlet and an oil outlet of the lifting oil cylinder;
the reversing valve is connected with a switching oil path for receiving a rotating speed signal of an engine, when the engine is in a low-speed state, the oil inlet P is connected with the oil outlet A, B, the oil inlet P1 is connected with the oil outlet C, when the engine is in a high-speed state, the oil inlet P is connected with the oil outlet C, and the oil inlet P1 is connected with the oil outlet B;
the lifting confluence valve is provided with an upper position and a lower position, the oil inlet D is connected with the oil port F in the lower position, the oil inlet E is connected with the oil port G, the oil inlet E and the oil inlet D are converged and output to the oil port P2 from the oil port G in the upper position, the confluence of the oil inlet E and the oil inlet D is also connected with the oil port F, and a first adjustable throttle valve is arranged on a liquid path connected with the oil port F;
the balance valve group is provided with a left, a middle and a right three positions, and when the balance valve group is in the middle position, the oil port P2 is connected to the oil outlet T3; when the lifting oil cylinder is in a left position, the oil port H is connected with the oil outlet T2 and the oil port P2 to form a lifting oil cylinder oil return liquid path, and a first hydraulic lock and a second adjustable throttle valve are arranged on the lifting oil cylinder oil return liquid path to form lifting oil cylinder oil return primary control; and when the lifting oil cylinder is in a right position, the oil port P2 is connected with the oil port H to form an oil inlet liquid path of the lifting oil cylinder.
2. The hydraulic integrated control device for the bogie and box body lifting system of the mine car as claimed in claim 1, wherein a second hydraulic lock is arranged between the oil port G and the oil outlet T1 to form a secondary control of oil return of the lifting cylinder.
3. The hydraulic integrated control device for the bogie and box lifting system of the mine car as claimed in claim 1, further comprising a spring-type accumulator, wherein the spring-type accumulator is provided with an oil port J1, and the oil port J1 is arranged on a liquid path connecting the oil port F and the oil port J.
4. The hydraulic integrated control device for a steering system and a box body lifting system of a mine car as claimed in claim 2, wherein a gravity sensor is arranged at the end part of the lifting cylinder and electrically connected with the balancing valve group, when the gravity sensor detects that the lifting pressure is greater than a set value range, the gravity sensor controls the balancing valve group to be sequentially adjusted to a middle position and a left position, and the first hydraulic lock, the second adjustable throttle valve and the second hydraulic lock are matched to control the lifting cylinder to shake.
5. The hydraulic integrated control device for the steering system and the box body lifting system of the mine car as claimed in claim 1, further comprising a system safety valve, wherein an inlet of the system safety valve is connected with an outlet of the large-flow pump and an outlet of the small-flow pump respectively, a check valve is further arranged between the outlet of the small-flow pump and the inlet of the system safety valve, and an outlet of the system safety valve is connected with an oil tank to form a first-stage pressure relief protection.
6. The hydraulic integrated control device for the steering system and the box body lifting system of the mine car as claimed in claim 1, further comprising a diverter safety valve, wherein an inlet of the diverter safety valve is connected with an oil inlet path of the diverter, and an outlet of the diverter safety valve is connected with an oil tank to form secondary pressure relief protection.
7. The integrated hydraulic control system for a steering system and a tank lifting system of a mining vehicle as claimed in claim 1, further comprising a speed signal converter, and wherein the directional control valve receives engine ECU signals via the speed signal converter.
8. The hydraulic integrated control device for the bogie and box body lifting system of the mine car as claimed in any one of claims 1 to 7, wherein the oil tank is further provided with a return filter, the return filter is provided with an oil inlet K1 and an oil outlet K2, the oil outlet T3 or T4 is connected with the oil inlet K1, and the oil outlet K2 is connected with the oil tank.
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| CN201811326255.1A CN111152838B (en) | 2018-11-08 | 2018-11-08 | Hydraulic integrated control device for mine car steering system and box lifting system |
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| CN201811326255.1A CN111152838B (en) | 2018-11-08 | 2018-11-08 | Hydraulic integrated control device for mine car steering system and box lifting system |
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Address after: 225000 No.8 Weichai Avenue, Hanjiang Automobile Industrial Park, Yangzhou City, Jiangsu Province Applicant after: Weichai (Yangzhou) Special Vehicle Co.,Ltd. Address before: 225000 No.8 Weichai Avenue, Hanjiang Automobile Industrial Park, Yangzhou City, Jiangsu Province Applicant before: YANGZHOU SHENGDA SPECIAL VEHICLES Co.,Ltd. |
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