CN216666058U - Emergency hydraulic system and engineering machinery vehicle - Google Patents
Emergency hydraulic system and engineering machinery vehicle Download PDFInfo
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- CN216666058U CN216666058U CN202123273847.1U CN202123273847U CN216666058U CN 216666058 U CN216666058 U CN 216666058U CN 202123273847 U CN202123273847 U CN 202123273847U CN 216666058 U CN216666058 U CN 216666058U
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Abstract
The utility model relates to an emergency hydraulic system and an engineering mechanical vehicle, wherein the emergency hydraulic system comprises a gas-liquid balance pump, the gas-liquid balance pump comprises a gas inlet N1, a liquid inlet N2 and a liquid outlet N3, the gas inlet N1 is connected with a gas source, the liquid inlet N2 is connected with a fuel tank, the liquid outlet N3 is connected with a steering system and a parking braking system, and the steering system or the parking braking system can be controlled to work by adjusting the pressure of the liquid outlet N3 of the gas-liquid balance pump. The engineering machinery vehicle comprises wheels, a parking braking system, a steering system, a main control oil path and an emergency hydraulic system, wherein the main control oil path is connected with the parking braking system and the steering system, the parking braking system and the steering system are connected with the wheels, the emergency hydraulic system is connected with the parking braking system and the steering system through shuttle valves, and when the main control oil path breaks down, the emergency hydraulic system is used for controlling the parking braking system to brake the wheels and controlling the steering system to work so as to drive the wheels to steer.
Description
Technical Field
The utility model relates to the technical field of engineering machinery vehicles, in particular to an emergency hydraulic system and an engineering machinery vehicle.
Background
The off-highway mining dump truck is an important transportation tool in strip mine mining, and the failure rate of the off-highway mining dump truck is high due to the complex severe working environment condition of the strip mine. When the mining vehicle cannot be started in the operation process, the fault vehicle needs to be hauled to a specified place for repair in order to not influence the continuous operation of the work. Once the vehicle breaks down, the functions of a steering system, service braking, parking braking and the like of the vehicle are all failed, and if the parking braking is locked, the trailer cannot be realized.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the utility model provides an emergency hydraulic system and an engineering mechanical vehicle, and solves the technical problem that a trailer cannot be carried out due to the failure of functions of a steering system, a service brake and a parking brake when a vehicle breaks down in the prior art.
(II) technical scheme
In order to achieve the aim, the utility model provides an emergency hydraulic system and an engineering mechanical vehicle, and the specific technical scheme is as follows:
an emergency hydraulic system for connection to a steering system and a parking brake system, the emergency hydraulic system comprising:
the gas-liquid balance pump comprises a gas inlet N1, a liquid inlet N2 and a liquid outlet N3;
the air inlet N1 is connected with an air source, the liquid inlet N2 is connected with an oil tank, and the liquid outlet N3 is used for being connected with a steering system and a parking braking system.
Further, a check valve is arranged between a liquid outlet N3 of the gas-liquid balance pump and the steering system/parking braking system;
the inlet of the check valve is connected to liquid outlet N3 and the outlet is connected to the steering system/parking brake system.
Further, a pressure gauge is arranged between the check valve and the liquid outlet N3 of the gas-liquid balance pump and used for detecting the outlet pressure of the liquid outlet N3 of the gas-liquid balance pump in real time.
Further, the pressure gauge is a shock-proof pressure gauge.
Further, an oil absorption filter is arranged between the liquid inlet N2 of the gas-liquid balance pump and the oil tank;
the inlet of the oil absorption filter is connected with the oil tank, and the outlet of the oil absorption filter is connected with a liquid inlet N2 of the gas-liquid balance pump.
Further, a pressure regulating filter is arranged between the gas inlet N1 of the gas-liquid balance pump and the gas-liquid, and the pressure regulating filter is used for filtering and pressurizing gas flowing into the gas inlet N1.
A work machine vehicle comprising:
a wheel;
the parking braking system is connected with the wheels and is used for braking the wheels;
the steering system is connected with the wheels, and the wheels can be driven to steer by the operation of the steering system;
the main control oil way is respectively connected with the parking braking system and the steering system;
in the emergency hydraulic system, the emergency hydraulic system is connected with the main control oil way, the steering system and the parking braking system through the shuttle valve;
when the main control oil way breaks down, the emergency hydraulic system is used for controlling the parking braking system to brake the wheels and controlling the steering system to work so as to drive the wheels to steer.
(III) advantageous effects
The emergency hydraulic system and the engineering machinery vehicle effectively overcome the defects of the prior art.
According to the utility model, a gas-liquid balance pump is arranged and comprises a gas inlet N1, a liquid inlet N2 and a liquid outlet N3, wherein the gas inlet N1 is connected with a gas source, the liquid inlet N2 is connected with a fuel tank, and the liquid outlet N3 is connected with a parking braking system and a steering system.
The utility model also provides the engineering machinery vehicle, and the parking braking system and the steering system are separated from the main control oil way by connecting the gas-liquid balance pump of the emergency hydraulic system with the parking braking system and the steering system. When the vehicle needs to be towed due to a fault, the main control oil circuit cannot control the parking braking system and the steering system to work, the pressure of the liquid outlet N3 of the gas-liquid balance pump can be adjusted to enable the pressure of the liquid outlet N3 to be equal to the parking braking release pressure, and the braking of the parking braking system on the wheel is released, so that the vehicle can be conveniently transferred to a designated place. In the process of towing, the outlet pressure of the gas-liquid balance pump is adjusted, and the steering system is controlled to work to drive the wheels to steer so as to adapt to the requirements of the towing vehicles at different road sections.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application, and in which:
FIG. 1 is a hydraulic schematic of a work machine vehicle according to an embodiment;
FIG. 2 is a hydraulic schematic of an emergency hydraulic system in an embodiment;
FIG. 3 is an enlarged view of a portion of the brake actuator shown at A in FIG. 1;
fig. 4 is an enlarged view of a portion of the shuttle valve at B of fig. 1.
[ description of reference ]
1. An emergency hydraulic system;
11. a gas-liquid balance pump; 12. a pressure gauge; 13. a one-way valve; 14. an oil absorption filter; 15. a pressure regulating filter;
2. a gas source; 3. an oil tank; 4. a main control oil way; 5. a shuttle valve;
6. a steering system; 61. a steering cylinder; 62. a steering transition valve group;
7. a parking brake system; 71. a brake valve bank;
72. a parking brake; 721. a rodless cavity; 722. a rod cavity; 723. a piston rod; 724. a pressure spring;
73. a brake pad.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the utility model. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present embodiment and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of protection of the present embodiment.
Referring to fig. 2, according to an embodiment of the present application, an emergency hydraulic system 1, configured to be connected to a steering system 6 and a parking brake system 7, specifically includes a gas-liquid balance pump 11, where the gas-liquid balance pump 11 includes a gas inlet N1, a liquid inlet N2, and a liquid outlet N3. The air inlet N1 is connected with the air source 2, the liquid inlet N2 is connected with the oil tank 3, the liquid outlet N3 is connected with the steering system 6 and the parking braking system 7, and the pressure of the liquid outlet N3 of the gas-liquid balance pump 11 can be adjusted to control the steering system 6 or the parking braking system 7 to work.
The gas-liquid balance pump 11 is also called a gas-liquid booster pump, and is a reciprocating plunger pump using gas as a power source. The pressure of the liquid outlet N3 of the gas-liquid balance pump 11 is related to the gas driving force of the gas inlet N1, the piston rod of the plunger pump is driven by gas to reciprocate, so that the liquid in the oil tank 3 is continuously sucked in from the liquid inlet N2, and is discharged from the liquid outlet N3 after being pressurized. Specifically, in this embodiment, when the vehicle fails and cannot work, the pressure of the liquid outlet N3 of the gas-liquid balance pump 11 can be adjusted by adjusting the inlet pressure of the gas inlet N1 of the gas-liquid balance pump 11, so that the pressure of the liquid outlet N3 is equal to the parking brake release pressure, the brake of the parking brake system 7 on the vehicle is released, and the vehicle with the failure is pulled to a specified position. The operation of the steering system 6 can be controlled by the gas-liquid balance pump 11 to steer the vehicle in the process of towing, so that the requirements of the towing on different road sections can be met.
A pressure regulating filter 15 is further arranged between the gas inlet N1 of the gas-liquid balance pump 11 and the gas source 2, and the pressure regulating filter 15 is used for filtering and pressurizing gas flowing into the gas inlet N1.
The pressure of the gas flowing into the gas inlet N1 of the gas-liquid balance pump 11 is adjusted by the pressure adjusting filter 15, the pressure of the liquid outlet N3 of the gas-liquid balance pump 11 is indirectly adjusted, the pressure of the liquid outlet N3 of the gas-liquid balance pump 11 is made to be equal to the parking brake release pressure, and then the adjustment of the pressure adjusting filter 15 is stopped. The pressure regulating filter 15 is used for filtering the gas flowing into the gas inlet N1 of the gas-liquid balance pump 11 while regulating the pressure, so as to prevent impurities from entering the gas-liquid balance pump 11 to cause blockage, and influence on the service effect and the service life of the gas-liquid balance pump 11.
In this embodiment, a check valve 13 is further disposed at the liquid outlet N3 end of the gas-liquid balance pump 11, the check valve 13 is disposed on a hydraulic line between the liquid outlet N3 of the gas-liquid balance pump 11 and the parking brake system 7 and the steering system 6, an inlet of the check valve 13 is connected to the liquid outlet N3 of the gas-liquid balance pump 11, and an outlet of the check valve is connected to the parking brake system 7 and the steering system 6.
It can be understood that the check valve 13 is a one-way conducting valve, which can ensure that hydraulic oil flows from the liquid outlet N3 of the gas-liquid balance pump 11 to the steering system 6 or the parking and parking brake system 7 in one direction, and prevent the hydraulic oil from flowing back.
In this embodiment, a pressure gauge 12 is further disposed between the check valve 13 and the liquid outlet N3 of the gas-liquid balance pump 11, and the pressure gauge 12 is used for monitoring the outlet pressure of the gas-liquid balance pump 11 in real time.
When a vehicle with a fault needs to be towed, the pressure of a liquid outlet N3 of the gas-liquid balance pump 11 is adjusted to a brake release pressure, real-time observation can be carried out through outlet pressure information displayed by the pressure gauge 12, when the outlet pressure displayed by the pressure gauge 12 is equal to the brake release pressure, the gas-liquid balance pump 11 is controlled to stop running, and the parking brake is released.
As a preferable scheme, the pressure gauge 12 of the present embodiment is preferably a shock-proof pressure gauge 12, and the shock-proof pressure gauge 12 is a pressure gauge 12 with a damping element and a filling liquid installed in a case, and has good shock resistance, excellent applicability to a shock environment, and is suitable for use requirements in severe environments such as mines and tunnels.
Further, an oil absorption filter 14 is further arranged between the one-way valve 13 and the oil tank 3, and the oil absorption filter 14 is used for filtering hydraulic oil absorbed into the gas-liquid balance pump 11, so that impurities are prevented from entering the gas-liquid balance pump 11 to cause blockage, and the service life of the gas-liquid balance pump 11 is prevented from being influenced.
Based on the specific structure of the emergency hydraulic system 1, referring to fig. 1, the embodiment further provides an engineering machinery vehicle, which specifically includes wheels, a parking brake system 7, a steering system 6, a main control oil path 4, and the emergency hydraulic system 1. The main control oil way 4 is connected with the parking braking system 7 and the steering system 6, the parking braking system 7 and the steering system 6 are also connected with wheels, and the emergency hydraulic system 1 is connected with the main control oil way 4, the parking braking system 7 and the steering system 6 through the shuttle valve 5. During normal use, accessible main control oil circuit 4 control parking braking system 7 and the work of a steering system 6, when the vehicle broke down, main control oil circuit 4 can't use, can't carry out the trailer and handle, and the parking braking system 7 and the work of a steering system 6 that accessible emergency hydraulic system 1 control corresponds.
As shown in fig. 1 and 4, an outlet end of the main control oil path 4 is connected with an oil inlet V1 of a shuttle valve 5, an oil outlet of the shuttle valve 5 is respectively connected with a parking braking system 7 and a steering system 6, and the emergency hydraulic system 1 is connected with an oil inlet V2 of the shuttle valve 5. The shuttle valve 5 is used for isolating the main control oil path 4, so that the emergency hydraulic system 1 is relatively independent relative to the main control oil path 4. When the vehicle needs to be towed due to a fault, the main control oil path 4 cannot work, and the parking braking system 7 can be controlled to work through the emergency hydraulic system 1, so that the braking on the wheels is relieved. In the process of towing, the emergency hydraulic system 1 can also be used for controlling the steering system 6 to work, and the steering system 6 drives wheels to steer so as to adapt to the use requirements of a steering road section.
As shown in fig. 3, the parking brake system 7 includes a parking brake valve set 71, a brake pad 73, and a parking brake 72, and the parking brake 72 is connected to the oil outlet of the shuttle valve 5 through the brake valve set 71. The parking brake 72 comprises a parking brake oil cavity and a brake oil cavity, a piston rod 723 is arranged in the parking brake oil cavity, the parking brake oil cavity is divided into a rod cavity 722 and a rodless cavity 721 by the piston rod 723, a pressure spring 724 is arranged in the rodless cavity 721, a brake pad 73 is arranged at the end part of the piston rod 723, and the piston rod 723 can drive the brake pad 73 to be in friction contact with or separate from a wheel when in telescopic motion.
During normal running, a rod cavity 722 of the parking brake oil cavity is filled with high-pressure oil, the high-pressure oil pushes a piston rod 723 to move towards a rodless cavity 721 to drive a brake pad 73 to move towards a direction far away from a wheel, a pressure spring 724 is compressed, and the brake pad 73 is not in contact with the wheel. When parking braking is needed, high-pressure oil in the rod cavity 722 of the parking braking oil cavity is discharged, the compression spring 724 pushes the piston rod 723 to move towards the rod cavity 722, and the brake pad 73 is in friction contact with the wheel to lock the wheel, so that the parking braking is achieved. If the vehicle fails and cannot be started, the gas-liquid balance pump 11 of the emergency hydraulic system 1 is controlled to be started, high-pressure oil is pumped into the rod cavity 722 of the parking brake oil cavity through the gas-liquid balance pump 11, the high-pressure oil pushes the piston rod 723 to move towards the direction of the rodless cavity 721, the brake pad 73 is separated from frictional contact with the wheel, parking brake is released, and the failed vehicle can be transported to a specified position.
In this embodiment, the steering system 6 includes a steering transition valve group 62 and a steering cylinder 61, the steering cylinder 61 is connected to the oil outlet of the shuttle valve 5 through the steering transition valve group 62, and the power output end of the steering cylinder 61 is connected to the wheels. When the vehicle runs normally, the steering oil cylinder 61 can be controlled to stretch out and draw back through the main control oil way 4 so as to drive the wheels to steer. When the main control oil path 4 fails, the gas-liquid balance pump 11 of the emergency hydraulic system 1 pumps hydraulic oil to the corresponding steering oil cylinder 61 to drive corresponding wheels to steer, so as to meet the requirements of trailers in different road sections.
The aforesaid is the concrete structure of emergent hydraulic system 1 of this embodiment and engineering machine tool car, and emergent hydraulic system 1 is independent mutually through shuttle valve 5 and main control oil circuit 4, has low in manufacturing cost, simple structure, and the characteristics of being convenient for adjust. When the vehicle breaks down, the parking brake of trouble vehicle is relieved to the emergent hydraulic system 1 of accessible to shift the trouble vehicle to the assigned position, the trailer in-process, still can turn to through the work of emergent hydraulic system 1 control steering system 6, convenient and fast.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention.
Claims (7)
1. An emergency hydraulic system for connection to a steering system (6) and a parking brake system (7), the emergency hydraulic system comprising:
the gas-liquid balance pump (11) comprises a gas inlet N1, a liquid inlet N2 and a liquid outlet N3;
the air inlet N1 is connected with an air source (2), the liquid inlet N2 is connected with an oil tank (3), and the liquid outlet N3 is respectively connected with the steering system (6) and the parking brake system (7).
2. The emergency hydraulic system according to claim 1, characterized in that a check valve (13) is further arranged between the liquid outlet N3 of the gas-liquid balance pump (11) and the steering system (6)/parking brake system (7);
and the inlet of the one-way valve (13) is connected with the liquid outlet N3 of the gas-liquid balance pump (11), and the outlet of the one-way valve is connected with the steering system (6)/the parking brake system (7).
3. The emergency hydraulic system according to claim 2, wherein a pressure gauge (12) is further arranged between the check valve (13) and the liquid outlet N3 of the gas-liquid balance pump (11), and the pressure gauge (12) is used for detecting the outlet pressure of the liquid outlet N3 of the gas-liquid balance pump (11) in real time.
4. Emergency hydraulic system according to claim 3, characterized in that the pressure gauge (12) is a shock-resistant pressure gauge.
5. The emergency hydraulic system according to claim 1, characterized in that an oil suction filter (14) is arranged between the liquid inlet N2 of the gas-liquid balance pump (11) and the oil tank (3);
the inlet of the oil absorption filter (14) is connected with the oil tank (3), and the outlet of the oil absorption filter is connected with the liquid inlet N2 of the gas-liquid balance pump (11).
6. The emergency hydraulic system according to claim 1, characterized in that a pressure regulating filter (15) is further arranged between the air inlet N1 of the air-liquid balance pump (11) and the air source (2), and the pressure regulating filter (15) is used for filtering and pressurizing air flowing into the air inlet N1.
7. A construction machine vehicle, characterized by comprising:
a wheel;
the parking brake system (7) is connected with the wheels and used for braking the wheels;
the steering system (6) is connected with the wheels, and the steering system (6) can drive the wheels to steer when working;
the main control oil way (4) is respectively connected with the parking braking system (7) and the steering system (6);
the emergency hydraulic system (1) as claimed in any of claims 1 to 6, the emergency hydraulic system (1) being connected to the main control circuit (4), the parking brake system (7) and the steering system (6) by means of a shuttle valve (5);
when the main control oil way (4) breaks down, the emergency hydraulic system (1) is used for controlling the parking braking system (7) to brake the wheels and controlling the steering system (6) to work so as to drive the wheels to steer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123273847.1U CN216666058U (en) | 2021-12-23 | 2021-12-23 | Emergency hydraulic system and engineering machinery vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123273847.1U CN216666058U (en) | 2021-12-23 | 2021-12-23 | Emergency hydraulic system and engineering machinery vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216666058U true CN216666058U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123273847.1U Active CN216666058U (en) | 2021-12-23 | 2021-12-23 | Emergency hydraulic system and engineering machinery vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216666058U (en) |
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2021
- 2021-12-23 CN CN202123273847.1U patent/CN216666058U/en active Active
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