CN220700895U - Hydraulic system of narrow-gauge crawler carrier vehicle - Google Patents
Hydraulic system of narrow-gauge crawler carrier vehicle Download PDFInfo
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- CN220700895U CN220700895U CN202322460393.1U CN202322460393U CN220700895U CN 220700895 U CN220700895 U CN 220700895U CN 202322460393 U CN202322460393 U CN 202322460393U CN 220700895 U CN220700895 U CN 220700895U
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- 238000004804 winding Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- 238000013519 translation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
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- 230000002457 bidirectional effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 238000011217 control strategy Methods 0.000 description 1
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Abstract
A hydraulic system of a narrow-gauge crawler carrier vehicle comprises a walking hydraulic unit, a lifting hydraulic unit, a rescue hydraulic unit and a cooling hydraulic unit; the hydraulic pump also comprises a main hydraulic pump and an auxiliary hydraulic pump; the main hydraulic pump is connected with the traveling hydraulic unit to drive the vehicle to travel, is connected with the lifting hydraulic unit to drive the vehicle to lift, and is connected with the rescue system to drive the quick rope retraction and release; the auxiliary hydraulic pump is connected with the cooling hydraulic unit to provide cooling for hydraulic oil return, is connected with the traveling hydraulic unit to switch between a high-speed traveling state and a low-speed traveling state, and is connected with the rescue hydraulic unit to drive the rescue hydraulic unit to hoist and rescue. The hydraulic control system of the narrow-gauge crawler carrier vehicle can drive the vehicle to walk on a complex mountain road, and hydraulic power output is provided for hoisting and rescuing winch to meet the requirements of mountain construction rescuing function. The main hydraulic pump and the auxiliary hydraulic pump are reasonably designed through a hydraulic system, and hydraulic power output is distributed for walking, lifting and rescuing winch under different working conditions.
Description
Technical Field
The utility model relates to the field of engineering mountain transportation and rescue equipment, in particular to a hydraulic system of a narrow-gauge crawler carrier vehicle.
Background
In the application field of construction engineering and rescue, the narrow-gauge crawler carrier is widely applied because the narrow-gauge crawler carrier can adapt to the walking of complex mountain road conditions and can take lifting, hoisting and rescue into consideration. In practical application, the narrow-gauge crawler carrier vehicle has a severe working condition and needs a large output power in rescue operation, so that the internal combustion engine is matched with the hydraulic control system, and has the advantages of high endurance, high reliability and large output power, and is still a better solution.
By searching, the technical literature of hydraulic systems of construction rescue vehicles such as related crawler vehicles and the like is disclosed in the prior art. For example, the utility model patent publication with publication number "CN109249848A" entitled "carrier vehicle hydraulic system and carrier vehicle". The hydraulic system comprises a jacking system for overturning the overturning frame and a translation system for translating the sliding frame, wherein the translation system comprises a translation oil cylinder, the translation oil cylinder is arranged between the sliding frame and the overturning frame, the sliding frame is connected with the overturning frame in a sliding mode, and the sliding frame can be driven to slide along the overturning frame by lifting and shrinking of the translation oil cylinder. The hydraulic system provided in the comparison document enables the transport vehicle to have the overturning and translating functions, but corresponding solutions are not provided for application conditions such as mountain walking, lifting, rescue and the like.
For example, the utility model patent publication with publication number of CN113942390A named as hydraulic system of integral self-propelled molten iron transport vehicle. The hydraulic system comprises a walking hydraulic system, a steering hydraulic system, a lifting hydraulic system, an oil supplementing system, a capping hydraulic system and an emergency system which are all connected with an engine of the transport vehicle. The traveling hydraulic system is used for driving the transport vehicle to travel; the steering hydraulic system is used for driving the steering of the transport vehicle; the lifting hydraulic system is used for driving the transport vehicle to lift; the oil supplementing system is used for supplementing oil to the steering hydraulic system, and the loss of hydraulic oil causes the problem of steering deviation; the capping hydraulic system is used for driving a cap body on the transport vehicle; the emergency system is used for providing emergency power or electric power guarantee. The hydraulic system technical scheme related in the comparison document meets the requirement of molten iron transportation of iron and steel enterprises, provides emergency guarantee for the fault of the transportation vehicle, and does not relate to a hydraulic control system of the narrow-gauge crawler transportation vehicle.
For example, the utility model patent with publication number of CN216767904U entitled "transport vehicle and hydraulic system thereof". A transport vehicle and a hydraulic system thereof are disclosed. The transport vehicle comprises a rear door and a rear door oil cylinder for driving the rear door to open and close, wherein the rear door oil cylinder comprises two cavities. The hydraulic system comprises an oil tank, a hydraulic pump, a first reversing valve and a bidirectional hydraulic lock. The oil tank is filled with hydraulic oil; the hydraulic pump is communicated with the oil tank to pump out hydraulic oil and provide the hydraulic oil for the back door oil cylinder; the first reversing valve is arranged at the downstream of the hydraulic pump; the first reversing valve is a three-position four-way electromagnetic valve with a Y-shaped median function; the first working oil port and the second working oil port of the first reversing valve are respectively communicated with the two cavities; the bidirectional hydraulic lock is arranged between the first reversing valve and the back door cylinder; the two-way hydraulic lock comprises two hydraulic control check valves which are arranged in parallel, and the two hydraulic control check valves are respectively arranged corresponding to the first working oil port and the second working oil port so as to lock the back door oil cylinder when no pressure exists in the back door oil cylinder. The comparison document ensures that no matter whether hydraulic oil is leaked outwards or leaked inwards through reasonable design of the hydraulic system, the rear door can not be opened all the time, and the rear door is always in a closed state in driving. Similar to the above reference, the hydraulic control system of the narrow-gauge crawler is also not involved.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a hydraulic system of a narrow-gauge crawler carrier vehicle, which comprises a walking hydraulic unit, a lifting hydraulic unit, a rescue hydraulic unit and a cooling hydraulic unit; the hydraulic pump also comprises a main hydraulic pump and an auxiliary hydraulic pump;
the main hydraulic pump is connected with the traveling hydraulic unit to drive the vehicle to travel, is connected with the lifting hydraulic unit to drive the vehicle to lift, and is connected with the rescue system to drive the quick rope retraction and release;
the auxiliary hydraulic pump is connected with the cooling hydraulic unit to provide cooling for hydraulic oil return, is connected with the traveling hydraulic unit to switch between a high-speed traveling state and a low-speed traveling state, and is connected with the rescue hydraulic unit to drive the rescue hydraulic unit to hoist and rescue.
Further, the main hydraulic pump includes a first main pump and a second main pump, and a first main pump pilot inlet 91G and a second main pump pilot inlet 92G are communicated; an oil outlet 91P of the first main pump is communicated with a pilot inlet 91G of the first main pump and a pilot inlet 92G of the second main pump through a one-way valve I; the second main pump oil outlet 92P communicates with the first main pump pilot inlet 91G and the second main pump pilot inlet 92G via a second check valve.
Further, the auxiliary hydraulic pump communicates with the primary pump first pilot inlet 91G and the secondary pump second pilot inlet 92G.
Further, a shuttle valve is further connected between the auxiliary hydraulic pump and the first pilot inlet 91G and between the auxiliary hydraulic pump and the second pilot inlet 92G, and the shuttle valve is further connected with a first check valve and a second check valve.
Further, an oil inlet of the overlapped sequence valve is connected to a rear road connected with the auxiliary hydraulic pump and the shuttle valve, and the overlapped sequence valve is set with a pilot pressure threshold value.
Further, the oil outlets of the overlapped sequence valves are connected with a cooling fan in the cooling hydraulic unit through a cooling system reversing valve.
Further, a single-way stable flow dividing valve is connected between the oil outlet of the overlapped sequence valve and the reversing valve of the cooling system, the oil outlet 8A of the single-way stable flow dividing valve is connected with the cooling fan, and the single-way stable flow dividing valve is provided with a flow threshold of the cooling system.
Further, the main hydraulic pump is respectively connected with the lifting hydraulic unit and the rescue hydraulic unit through lifting rescue reversing valves; the first oil outlet 91P and the second oil outlet 92P of the main pump are both connected with the oil inlet 15P of the lifting rescue reversing valve, the working oil port 15A of the lifting rescue reversing valve is connected with the lifting hydraulic unit, and the working oil port 15B of the lifting rescue reversing valve is connected with the rescue hydraulic unit.
Further, the oil outlet of the overlapped sequence valve is connected with the oil inlet 15P of the hoisting and rescue reversing valve through the rescue hoisting reversing valve.
Further, the oil outlet 8B of the single-way stable flow dividing valve is connected with a traveling hydraulic unit through a high-low speed traveling reversing valve.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. the hydraulic control system of the narrow-gauge crawler carrier vehicle can drive the vehicle to walk on a complex mountain road, and hydraulic power output is provided for hoisting and rescuing winch to meet the requirements of mountain construction rescuing function.
2. The main hydraulic pump and the auxiliary hydraulic pump are reasonably designed through a hydraulic system, and hydraulic power output is distributed for walking, lifting and rescuing winch under different working conditions.
Drawings
Fig. 1: schematic diagram of the hydraulic system of the narrow-gauge crawler carrier.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, a hydraulic system of a narrow-gauge crawler carrier vehicle comprises a walking hydraulic unit, a lifting hydraulic unit, a rescue hydraulic unit and a cooling hydraulic unit; the hydraulic pump also comprises a main hydraulic pump 9 and an auxiliary hydraulic pump 1; the main hydraulic pump 9 is connected with the traveling hydraulic unit to drive the vehicle to travel, is connected with the lifting hydraulic unit to drive the vehicle to lift, and is connected with the rescue system to drive the quick rope retraction and release; the auxiliary hydraulic pump 1 is connected with the cooling hydraulic unit to provide cooling for hydraulic oil return, is connected with the traveling hydraulic unit to switch between a high-speed traveling state and a low-speed traveling state, and is connected with the rescue hydraulic unit to drive the winch rescue.
In this embodiment, the main hydraulic pump 9 has a high hydraulic power output, and is mainly used for driving a vehicle to walk, driving the vehicle to hoist and construct, and realizing rapid retraction of the rescue cable in a space-borne state when the rescue hoist is required. The auxiliary hydraulic pump 1 can provide hydraulic power output for the high-speed running of the vehicle in the running working condition, provide hoisting power output when the rescue hoisting is loaded, and provide hydraulic power output for a cooling system of a hydraulic circuit of the whole vehicle.
The main hydraulic pump 9 comprises a first main pump 91 and a second main pump 92, wherein a first pilot inlet 91G of the first main pump is communicated with a second pilot inlet 92G of the second main pump; an oil outlet 91P of the first main pump is communicated with a pilot inlet 91G of the first main pump and a pilot inlet 92G of the second main pump through a first check valve 29; the second main pump oil outlet 92P communicates with the first main pump pilot inlet 91G and the second main pump pilot inlet 92G via the second check valve 30.
In the present embodiment, the first and second main pumps 91 and 92 drive the both-side crawler belts, respectively, to drive the vehicle to walk, and provide differential control in walking to realize steering of the vehicle. The first and second main pumps 91 and 92 adopt an electric proportion constant power control strategy, the first and second check valves 29 and 30 enable oil outlets and pilot inlets of the first and second main pumps 91 and 92 to be communicated, the first and second main pumps 91 and 92 take highest pressures for control, and the first and second main pumps 91 and 92 enable power control curves to be consistent as much as possible under the condition of power priority control. The valve 1DT and the valve 2DT are DC24V proportional valves and are used for performing electric proportional constant power control on the first main pump 91 and the second main pump 92.
The auxiliary hydraulic pump 1 communicates with a primary pump pilot inlet 91G and a secondary pump pilot inlet 92G. So that the auxiliary hydraulic pump 1 supplies the pilot pressure to the main pump.
A shuttle valve 11 is further connected between the auxiliary hydraulic pump 1 and the first and second pilot inlets 91G and 92G, and the shuttle valve 11 is further connected with a first check valve 29 and a second check valve 30. The shuttle valve 11, in cooperation with the check valve one 29 and the check valve two 30, can realize that the pilot pressure for normally regulating the speed of the main pump one 91 or the main pump two 92 is provided by the auxiliary hydraulic pump 1 when the non-working pilot control pressure of the main pump one 91 or the main pump two 92 is lower than the control pressure. When the operating pilot control pressure of the first main pump 91 or the second main pump 92 is higher than that of the auxiliary hydraulic pump 1, the first main pump 91 or the second main pump 92 itself provides the pilot pressure for normal speed regulation.
In the present embodiment, the first main pump oil outlet 91P and the second main pump oil outlet 92P are connected to the electromagnetic spill valve 14 via the first check valve 29 and the second check valve 30, and the output port of the electromagnetic spill valve 14 is connected to the cooler 10. When the vehicle is started in an idle state, the electromagnetic valve 3DT in the electromagnetic relief valve 14 is electrified, and oil flows to the cooler 10 through the electromagnetic relief valve 14, so that the vehicle is started without load. The electromagnetic valve 3DT in other working conditions is not electrified and is used as a system safety valve.
And an oil inlet of the superposition type sequence valve 4 is connected to a rear road where the auxiliary hydraulic pump 1 and the shuttle valve 11 are connected, and the superposition type sequence valve 4 is set with a pilot pressure threshold value. The superimposed sequence valve 4 ensures that the auxiliary hydraulic pump 1 can supply a pilot pressure not greater than a certain pilot pressure threshold value, which in this embodiment is set to 3Mpa. The pilot oil passage of the auxiliary hydraulic pump 1 is connected to the shuttle valve 11, and when the vehicle is started, the pressure of the auxiliary hydraulic pump 1 is higher than that of the main hydraulic pump, and the shuttle valve 11 is positioned at the left position to communicate the auxiliary hydraulic pump 1 with the primary pump primary pilot inlet 91G and the secondary pump secondary pilot inlet 92G to provide pilot pressure. When the vehicle starts and the hydraulic power output is stable, the main hydraulic pressure is greater than the auxiliary hydraulic pump 1, and the shuttle valve 11 is located at the right position to disconnect the pilot pressure communication of the auxiliary hydraulic pump 1. The first check valve 29, the second check valve 30 and the shuttle valve 11 are also connected with a pressure sensor 13.
The oil outlet of the superposition sequence valve 4 is connected with a cooling fan 101 in the cooling hydraulic unit through a cooling system reversing valve 22. The cooling system reversing valve 22 is a two-position four-way electromagnetic reversing valve, and the electromagnetic valve 8DT is not electrified when the cooling system is required to work, and the auxiliary hydraulic pump 1 and the cooling fan 101 are connected to provide air cooling for the cooler 10. And after the electromagnetic valve 8DT is powered, the oil outlet of the auxiliary hydraulic pump 1 is communicated with the return oil tank, and the cooling system does not work at the moment. In the embodiment, the output port of the auxiliary hydraulic pump 1 is connected with a check valve III 2 and a superposition overflow valve 3.
A single-way stable flow dividing valve 8 is connected between the oil outlet of the superposition type sequence valve 4 and the reversing valve 22 of the cooling system, the oil outlet 8A of the single-way stable flow dividing valve 8 is connected with a cooling fan 101, and the single-way stable flow dividing valve 8 is provided with a flow threshold of the cooling system. One of the purposes of the one-way stabilizing diverter valve 8 is to cause the auxiliary hydraulic pump 1 to provide the cooling hydraulic unit with a flow of oil that is no greater than the flow threshold of the cooling system, preventing the cooling hydraulic unit from overrunning. Specifically, when the pressure of the oil output by the auxiliary hydraulic pump 1 is smaller than the flow threshold of the cooling system, the cooling hydraulic unit can be directly driven; the oil outlet 8A has a flow output to the cooling hydraulic unit that is constantly equal to the cooling system flow threshold when it is greater than the cooling system flow threshold. In the present embodiment, the cooling system flow rate threshold is set to 18L.
In the embodiment, the oil outlet 8B of the one-way stable shunt valve 8 is connected with a traveling hydraulic unit through a high-low speed traveling reversing valve 21. When the high-low speed traveling state needs to be switched, the output pressure of the auxiliary hydraulic pump 1 needs to be higher than the flow threshold of the cooling system, and the redundant output pressure of the auxiliary hydraulic pump 1 is used for switching the high-low speed traveling state. The high-low speed traveling reversing valve 21 is a two-position four-way electromagnetic reversing valve, and when the electromagnetic valve 7DT is powered on, the output oil way of the auxiliary hydraulic pump 1 is communicated with the traveling hydraulic unit, so that the high-speed traveling of the vehicle is realized. When the electromagnetic valve 7DT is not powered, the output oil way of the auxiliary hydraulic pump 1 flows back to the return oil tank. In the embodiment, the oil outlet 8B of the one-way stable flow dividing valve 8 is also connected with a plug-in overflow valve 20 and a second shock-resistant pressure gauge 19.
The main hydraulic pump 9 is respectively connected with a lifting hydraulic unit and a rescue hydraulic unit through a lifting rescue reversing valve 15; the first oil outlet 91P and the second oil outlet 92P of the main pump are both connected with the oil inlet 15P of the lifting rescue reversing valve, the working oil port 15A of the lifting rescue reversing valve is connected with the lifting hydraulic unit, and the working oil port 15B of the lifting rescue reversing valve is connected with the rescue hydraulic unit. The lifting rescue reversing valve 15 is a three-position four-way electromagnetic reversing valve, when the electromagnetic valve 9DT is powered on, the output oil ways of the first main pump 91 and the second main pump 92 are communicated to the rescue hoisting hydraulic unit, and at the moment, the rescue hoisting hydraulic unit is in a working state so as to control the quick rope winding and unwinding during the driving rescue. When the solenoid valve 10DT is powered on, the output oil paths of the first main pump 91 and the second main pump 92 are communicated with the lifting hydraulic unit, and the lifting hydraulic unit is in an operable state at this time. When the electromagnetic valve 9DT and the electromagnetic valve 10DT are not powered, the hoisting hydraulic unit and the rescue hoisting unit are in a main pump driving non-working state. Specifically, the lifting and rescuing reversing valve 15 is connected with a rescuing winch hydraulic unit through the winch winding and unwinding reversing valve 7. The winch winding and unwinding reversing valve 7 is a three-position four-way electromagnetic reversing valve, when the winch is in the working condition of winding and unwinding ropes rapidly during winch rescue, the electromagnetic valve 9DT and the electromagnetic valve 5 DT/the electromagnetic valve 6DT are electrified, the output oil ways of the first main pump 91 and the second main pump 92 are communicated with the rescue winch hydraulic unit, and the rescue winch hydraulic unit is driven to realize that the electromagnetic valve 5 DT/the electromagnetic valve 6DT for winding and unwinding ropes rapidly is a rope winding and unwinding direction control electromagnetic valve. In the present embodiment, the first and second main pumps 91 and 92 are also connected with a check valve four 12. In this embodiment, the lifting and rescuing reversing valve working oil port 15B is connected with an overflow valve 16.
And an oil outlet of the overlapped sequence valve 4 is connected with an oil inlet 15P of the hoisting and rescue reversing valve through the rescue hoisting reversing valve 5. The rescue winch reversing valve 5 is a two-position four-way electromagnetic reversing valve, and when the rescue winch reversing valve is in a winch rescue loading working condition, the connection between the main hydraulic pump and the rescue winch hydraulic unit oil way should be disconnected, and the auxiliary hydraulic pump 1 and the rescue winch hydraulic unit oil way are communicated. The hydraulic system specifically comprises an electromagnetic valve 9DT and an electromagnetic valve 10DT which are not electrified, and the electromagnetic valve 4DT is communicated with an oil way of the auxiliary hydraulic pump 1 and the rescue winch hydraulic unit, so that the auxiliary hydraulic pump 1 drives the rescue winch hydraulic unit to realize winch rescue under a loading state. In the embodiment, the rescue winch reversing valve 5 and the winch winding and unwinding reversing valve 7 are also connected with a one-way valve five 6.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a narrow gauge crawler belt car hydraulic system which characterized in that: the hydraulic system comprises a walking hydraulic unit, a lifting hydraulic unit, a rescue hydraulic unit and a cooling hydraulic unit; the hydraulic system also comprises a main hydraulic pump (9) and an auxiliary hydraulic pump (1);
the main hydraulic pump (9) is connected with the traveling hydraulic unit to drive the vehicle to travel, is connected with the lifting hydraulic unit to drive the vehicle to lift, and is connected with the rescue hydraulic unit to drive the quick rope retraction;
the auxiliary hydraulic pump (1) is connected with the cooling hydraulic unit to provide cooling for hydraulic oil return, is connected with the walking hydraulic unit to switch between a high-speed walking state and a low-speed walking state, and is connected with the rescue hydraulic unit to drive the winch rescue.
2. The narrow gauge crawler hydraulic system of claim 1, wherein: the main hydraulic pump (9) comprises a first main pump (91) and a second main pump (92), and a first pilot inlet 91G of the main pump is communicated with a second pilot inlet 92G of the main pump; an oil outlet 91P of the first main pump is communicated with a pilot inlet 91G of the first main pump and a pilot inlet 92G of the second main pump through a one-way valve (29); the second main pump oil outlet 92P communicates with the first main pump pilot inlet 91G and the second main pump pilot inlet 92G through the second check valve (30).
3. The narrow gauge crawler hydraulic system of claim 2, wherein: the auxiliary hydraulic pump (1) is communicated with a primary pilot inlet 91G and a secondary pilot inlet 92G of the main pump.
4. The narrow gauge crawler hydraulic system of claim 3, wherein: and a shuttle valve (11) is further connected between the auxiliary hydraulic pump (1) and the first pilot inlet 91G and between the auxiliary hydraulic pump and the second pilot inlet 92G, and the shuttle valve (11) is further connected with a first check valve (29) and a second check valve (30).
5. The narrow gauge crawler hydraulic system of claim 4, wherein: and an oil inlet of the superposition type sequence valve (4) is connected to a rear road connected with the auxiliary hydraulic pump (1) and the shuttle valve (11), and the superposition type sequence valve (4) is provided with a pilot pressure threshold value.
6. The narrow gauge crawler hydraulic system of claim 5, wherein: and an oil outlet of the overlapped sequence valve (4) is connected with a cooling fan (101) in the cooling hydraulic unit through a cooling system reversing valve (22).
7. The narrow gauge crawler hydraulic system of claim 6, wherein: a single-way stable flow dividing valve (8) is connected between the oil outlet of the superposition type sequence valve (4) and the reversing valve (22) of the cooling system, the oil outlet 8A of the single-way stable flow dividing valve (8) is connected with the cooling fan (101), and the single-way stable flow dividing valve (8) is provided with a flow threshold of the cooling system.
8. The narrow gauge crawler hydraulic system of claim 7, wherein: the main hydraulic pump (9) is respectively connected with a lifting hydraulic unit and a rescue hydraulic unit through a lifting rescue reversing valve (15); the first oil outlet 91P and the second oil outlet 92P of the main pump are both connected with the oil inlet 15P of the lifting rescue reversing valve, the working oil port 15A of the lifting rescue reversing valve is connected with the lifting hydraulic unit, and the working oil port 15B of the lifting rescue reversing valve is connected with the rescue hydraulic unit.
9. The narrow gauge crawler hydraulic system of claim 8, wherein: an oil outlet of the overlapped sequence valve (4) is connected with an oil inlet 15P of the hoisting and rescue reversing valve through a rescue hoisting reversing valve (5).
10. The narrow gauge crawler hydraulic system of claim 7, wherein: the oil outlet 8B of the single-way stable flow dividing valve (8) is connected with a traveling hydraulic unit through a high-low speed traveling reversing valve (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322460393.1U CN220700895U (en) | 2023-09-11 | 2023-09-11 | Hydraulic system of narrow-gauge crawler carrier vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322460393.1U CN220700895U (en) | 2023-09-11 | 2023-09-11 | Hydraulic system of narrow-gauge crawler carrier vehicle |
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| CN220700895U true CN220700895U (en) | 2024-04-02 |
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| CN202322460393.1U Active CN220700895U (en) | 2023-09-11 | 2023-09-11 | Hydraulic system of narrow-gauge crawler carrier vehicle |
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