CN217974567U - Double-pump switching crushing control hydraulic system and excavator - Google Patents
Double-pump switching crushing control hydraulic system and excavator Download PDFInfo
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- CN217974567U CN217974567U CN202221796005.6U CN202221796005U CN217974567U CN 217974567 U CN217974567 U CN 217974567U CN 202221796005 U CN202221796005 U CN 202221796005U CN 217974567 U CN217974567 U CN 217974567U
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Abstract
The application relates to the technical field of excavators, in particular to a double-pump switching crushing control hydraulic system and an excavator, wherein the double-pump switching crushing control hydraulic system is applied to engineering machinery, the engineering machinery comprises a main valve and an auxiliary tool, and the double-pump switching crushing control hydraulic system comprises a first main pump, a second main pump, a pilot pump, a flow combining valve and a switch valve; wherein, the first main pump is connected with the auxiliary tool through the main valve; the second main pump is connected with the auxiliary tool through the flow merging valve; the pilot pump, the switch valve and the flow merging valve are sequentially connected; the outlet ends of the second main pump and the switch valve are connected with the main valve. The application provides a broken control hydraulic system is switched to double pump can be through the selection of single double pump broken mode, and then realize that single pump fuel feeding is broken, double pump confluence fuel feeding is broken, also perhaps under the single pump mode, realizes two single pumps and supply oil broken mode in turn, and the practicality is stronger, can satisfy user's pluralism demand, can effectively prolong the life of pump moreover.
Description
Technical Field
The application relates to the technical field of excavators, in particular to a double-pump switching crushing control hydraulic system and an excavator.
Background
At present, an excavator is widely applied to the fields of mining and the like, and a crushing hydraulic system provided with the excavator only has a single-pump oil supply crushing hammer (as shown in fig. 1, the system comprises a main valve 1', a first main pump 2', a second main pump 3', a pilot pump 4', a crushing control valve 5' and a crushing hammer 6', wherein the structure of the main valve 1' can be referred to a patent document with the application number of 201910455104.4), or is a mode of a double-pump oil supply crushing hammer, which cannot meet diversified requirements of users, and particularly for the mode of the single-pump oil supply crushing hammer, because the crushing operation condition is severe, the service life of the single pump participating in the crushing operation can be greatly shortened.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a broken control hydraulic system and excavator is switched to two pumps, has solved the excavator that exists among the prior art to a certain extent and has only had single pump fuel feeding quartering hammer, perhaps is a mode of two pump fuel feeding quartering hammers, can't satisfy user's pluralism demand, especially to the mode of single pump fuel feeding, can shorten the technical problem of the life of this single pump greatly.
The application provides broken control hydraulic system is switched to double pump is applied to engineering machine tool, engineering machine tool includes the main valve and assists the utensil, its characterized in that, broken control hydraulic system is switched to double pump includes: the system comprises a first main pump, a second main pump, a pilot pump, a flow combining valve and a switch valve;
wherein the first main pump is connected with the auxiliary via the main valve; the second main pump is connected with the auxiliary tool through the flow merging valve;
the pilot pump, the switch valve and the flow combining valve are sequentially connected;
the outlet ends of the second main pump and the switch valve are connected with the main valve;
the oil supply crushing of the single pump and the oil supply crushing of the double pump confluence are realized, or the oil supply crushing of two single pumps alternatively is realized under the single pump oil supply crushing mode.
In the above technical solution, further, the dual-pump switching crushing control hydraulic system further includes a filter, and the pilot pump is connected to the switching valve via the filter.
In any of the above technical solutions, further, the on-off valve is an electromagnetic valve.
In any one of the above technical solutions, further, the dual-pump switching crushing control hydraulic system further includes a controller, and the controller is in communication connection with the first main pump, the second main pump, the pilot pump, and the electromagnetic valve, respectively.
In any one of the above technical solutions, further, the dual-pump switching crushing control hydraulic system further includes an oil storage tank for providing oil to the first main pump, the second main pump, and the pilot pump.
In any of the above technical solutions, further, the pipeline connected to the main valve and the auxiliary device intersects and converges with the pipeline connected to the confluence valve and the auxiliary device to form a whole, so as to form a main connection pipeline.
In any of the above technical solutions, further, a stop valve is disposed on the main connection pipeline.
In any of the above technical solutions, further, the first main pump is composed of a plurality of single pump bodies connected in parallel or in series;
the second main pump is composed of a plurality of single pump bodies which are connected in parallel or in series.
In any of the above technical solutions, further, the auxiliary device is a breaking hammer.
This application still provides an excavator, including the main valve, assist utensil and above-mentioned arbitrary technical scheme the broken control hydraulic system of double pump switching, therefore, have this double pump and switch broken control hydraulic system's whole beneficial technological effect, here, no longer describe repeatedly.
Compared with the prior art, the beneficial effect of this application is:
the application provides a broken control hydraulic system is switched to double pump can be through the selection of the broken mode of single double pump, and then realize that the single pump fuel feeding is broken, the double pump confluence fuel feeding is broken, also perhaps under the single pump mode, realize two single pumps and supply oil broken mode in turn, the practicality is stronger, can satisfy user's pluralism demand, can effectively prolong the life of pump moreover.
The application provides an excavator, including foretell double pump switching crushing control hydraulic system, and then can satisfy the user demand of user's pluralism.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a control hydraulic system for a single pump oil feed demolition hammer provided in the prior art;
fig. 2 is a schematic diagram of a hydraulic system for controlling crushing by switching two pumps according to an embodiment of the present application.
Reference numerals:
1 '-main valve, 2' -first main pump, 3 '-second main pump, 4' -pilot pump, 5 '-crushing control valve, 6' -crushing hammer;
1-a first main pump, 2-a second main pump, 3-a pilot pump, 4-a confluence valve, 5-a filter, 6-a switch valve, 7-a main valve, 8-a breaking hammer, 9-a main connecting pipeline, 10-a stop valve, 11-an oil storage tank and 12-a controller.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
A dual pump switching fragmentation control hydraulic system and excavator according to some embodiments of the present application is described below with reference to fig. 2.
Example one
Referring to fig. 2, an embodiment of the present application provides a dual-pump switching crushing control hydraulic system, which is applied to a construction machine, such as an excavator (hereinafter, the excavator will be described as an example), the excavator includes a main valve 7 and an auxiliary device, and preferably, the auxiliary device is a crushing hammer 8, and the dual-pump switching crushing control hydraulic system will be described as an example hereinafter, and includes: the system comprises a first main pump 1, a second main pump 2, a pilot pump 3, a flow combining valve 4 and a switch valve 6;
wherein the first main pump 1 is connected with a breaking hammer 8 via a main valve 7; the second main pump 2 is connected with a breaking hammer 8 through a confluence valve 4;
the pilot pump 3, the switch valve 6 and the flow converging valve 4 are sequentially connected;
the outlet ends of the second main pump 2 and the switching valve 6 are connected to a main valve 7.
Based on the structure described above, the working principle of the dual-pump switching crushing control hydraulic system provided by the application is as follows:
(1) Dual pump crushing mode:
when the first main pump 1 and the second main pump 2 are normally output, the main valve 7 is moved to the crushing position, the pilot oil output from the pilot pump 3 reaches the on-off valve 6, the on-off valve 6 is opened, a part of the pilot oil output through the on-off valve 6 controls the confluence valve 4 to be opened, and the other part of the pilot oil output through the on-off valve 6 flows into the main valve 7 to drive the main valve 7 and cut off the right-coupled center bypass.
During crushing operation, the first main pump 1 supplies oil to the breaking hammer 8 through the main valve 7, and the second main pump 2 supplies oil to the breaking hammer 8 through the confluence valve 4, so that the function of double-pump confluence oil supply and crushing operation is realized.
During crushing operation, the first main pump 1 and the second main pump 2 work at a relatively small discharge capacity, and at the moment, the efficiency of the pumps is relatively low, which is not beneficial to energy conservation.
(2) Single pump oil supply crushing mode:
a) Crushing work of the first Main Pump 1
The first main pump 1 outputs normally, the main valve 7 moves to the crushing position, and the first main pump 1 supplies oil to the crushing hammer 8 through the main valve 7.
For satisfying the required flow of broken operation, first main pump 1 work is at big discharge capacity this moment to guarantee the required flow of quartering hammer 8 work, the efficiency of pump is relatively high this moment, is favorable to energy-conservation.
The second main pump 2 is in a standby state with the minimum discharge capacity, the right-side central bypass of the main valve 7 is connected with return oil, the confluence valve 4 is in a non-working position, the second main pump 2 does not supply oil to the breaking hammer 8, and oil output to the breaking hammer 8 by the first main pump 1 is ensured not to return oil through the confluence valve 4 and the right-side central bypass of the main valve 7.
b) Second main pump 2 crushing operation
The second main pump 2 outputs normally, the switch valve 6 is opened, the confluence valve 4 is opened, the right-side central bypass of the main valve 7 is cut off, and the second main pump 2 supplies oil to the breaking hammer 8 through the confluence valve 4.
In order to meet the flow required by crushing operation, the second main pump 2 works at large displacement at the moment to ensure the flow required by the work of the crushing hammer 8, and the efficiency of the pump is relatively high at the moment, so that the energy conservation is facilitated.
The first main pump 1 is in a standby state with a minimum displacement, the main valve 7 moves to a non-working position of the breaking hammer 8, the first main pump 1 does not supply oil to the breaking hammer 8, and oil output by the second main pump 2 to the breaking hammer 8 is ensured not to return oil through the right-coupled central bypass of the main valve 7 (for how to cut off the right-coupled central bypass, the process of cutting off the right-coupled central bypass in the double-pump breaking mode can be referred to).
c) When the double-pump alternative oil supply crushing mode is used for crushing, the double-pump crushing mode and the single-pump oil supply crushing mode can be selected according to working condition characteristics, and when the single-pump oil supply crushing mode is selected, the first main pump 1 and the second main pump 2 can be used for performing crushing operation alternately, so that the service life of the whole main pump is prolonged.
It is thus clear that the broken control hydraulic system of double pump switching that this application provided can be through the selection of single double pump broken mode, and then realize that single pump fuel feeding is broken, double pump confluence fuel feeding is broken, also perhaps under the single pump mode, realizes two single pumps and supply oil broken mode in turn, and the practicality is stronger, can satisfy user's pluralism demand, can effectively prolong the life of pump moreover.
Further, preferably, as shown in fig. 2, the first main pump 1 is composed of a plurality of single pump bodies connected in parallel or in series; the second main pump 2 is composed of a plurality of single pump bodies connected in parallel or in series. Can be selected according to actual needs.
In one embodiment of the present application, preferably, as shown in fig. 2, the dual pump switching crushing control hydraulic system further includes a filter 5, and the pilot pump 3 is connected with the switching valve 6 via the filter 5.
In this embodiment, the filter 5 can filter out impurities in the oil, so that clean oil circulates among the components.
In one embodiment of the present application, as shown in fig. 2, the on-off valve 6 is preferably a solenoid valve, which is opened when power is supplied and closed when power is off, and has a high degree of automation and does not need to be operated manually.
In one embodiment of the present application, preferably, as shown in fig. 2, the dual-pump switching crushing control hydraulic system further comprises a controller 12, and the controller 12 is in communication connection with the first main pump 1, the second main pump 2, the pilot pump 3 and the solenoid valve respectively.
In this embodiment, the controller 12 controls the actions of the components of the first main pump 1, the second main pump 2, the pilot pump 3 and the electromagnetic valve, so that the controllability is stronger, and the controller 12 capable of executing the functions is common in the art and will not be described in detail herein.
In one embodiment of the present application, preferably, as shown in fig. 2, the dual-pump switching crushing control hydraulic system further includes a reservoir tank 11 for supplying oil to the first main pump 1, the second main pump 2, and the pilot pump 3.
In this embodiment, the oil may be stored in the oil tank 11, and then the oil may be supplied to the first main pump 1, the second main pump 2, and the pilot pump 3.
In one embodiment of the present application, it is preferable that the lines connected to the main valve 7 and the auxiliary intersect and converge to form a single body with the confluence valve 4 and the lines connected to the auxiliary as shown in fig. 2 to form a total connection line 9, and it is preferable that the junction can be connected by a connection tee.
In this embodiment, can save the pipeline on the one hand, be convenient for arrange, on the other hand the oil inlet of breaker also only has one, and the back is put together in these two ways, conveniently communicates with the oil inlet of breaker.
Further, as shown in fig. 2, a stop valve 10 is preferably disposed on the main connecting pipeline 9, so that functions of oil transportation, stop, regulation and the like can be realized, and controllability is stronger.
In conclusion, the working principle of the double-pump switching crushing control hydraulic system is as follows:
(1) Dual pump crushing mode:
the first main pump 1, the second main pump 2, the main valve 7 and the solenoid valve receive the command sent by the controller 12 at the same time, the first main pump 1 and the second main pump 2 normally output according to the command of the controller 12, the main valve 7 moves to the crushing position according to the command of the controller 12, the pilot oil output by the pilot pump 3 reaches the solenoid valve, the solenoid valve opens, a part of the pilot oil output by the solenoid valve controls the flow combining valve 4 to open, and the other part of the pilot oil output by the solenoid valve flows into the main valve 7, drives the main valve 7, and cuts off the right-coupled central bypass.
During crushing operation, the first main pump 1 supplies oil to the breaking hammer 8 through the main valve 7, and the second main pump 2 supplies oil to the breaking hammer 8 through the confluence valve 4, so that the function of double-pump confluence oil supply and crushing operation is realized.
During crushing operation, the first main pump 1 and the second main pump 2 work at a relatively small displacement, and at the moment, the efficiency of the pumps is relatively low, which is not beneficial to energy conservation.
(2) Single pump oil supply crushing mode:
a) Crushing work of the first Main Pump 1
The first main pump 1 and the main valve 7 simultaneously receive the instruction from the controller 12, the first main pump 1 normally outputs the instruction according to the instruction from the controller 12, the main valve 7 moves to the crushing position according to the instruction from the controller 12, and the first main pump 1 supplies the oil to the crushing hammer 8 through the main valve 7.
For satisfying the required flow of broken operation, first main pump 1 work is at big discharge capacity this moment to guarantee the required flow of quartering hammer 8 work, the efficiency of pump is relatively high this moment, is favorable to energy-conservation.
The second main pump 2 is in a standby state with the minimum discharge capacity, the right-side central bypass of the main valve 7 is connected with return oil, the confluence valve 4 is in a non-working position, the second main pump 2 does not supply oil to the breaking hammer 8, and oil output to the breaking hammer 8 by the first main pump 1 is ensured not to return oil through the confluence valve 4 and the right-side central bypass of the main valve 7.
b) Second main pump 2 crushing operation
The second main pump 2 and the electromagnetic valve receive signals of the controller 12 at the same time, the second main pump 2 normally outputs signals according to instructions of the controller 12, the electromagnetic valve is opened according to instructions of the controller 12, oil enters the confluence valve 4, a valve core of the confluence valve 4 moves to be opened, a right connection central bypass of the main valve 7 is cut off, and the second main pump 2 supplies oil to the breaking hammer 8 through the confluence valve 4.
In order to meet the flow required by crushing operation, the second main pump 2 works at large displacement at the moment to ensure the flow required by the work of the crushing hammer 8, and the efficiency of the pump is relatively high at the moment, so that the energy conservation is facilitated.
The first main pump 1 is in a standby state with the minimum displacement, the main valve 7 moves to a non-working position of the breaking hammer 8, the first main pump 1 does not supply oil to the breaking hammer 8, and oil output to the breaking hammer 8 by the second main pump 2 is ensured not to return oil through a right-connected central bypass of the main valve 7.
c) When the P1 pump and the P2 pump are used for crushing in the mode of alternative oil supply crushing, a double-pump crushing mode and a single-pump oil supply crushing mode can be selected according to the working condition characteristics, and when the single-pump oil supply crushing mode is selected, the first main pump 1 and the second main pump 2 can be used for performing crushing operation alternately, so that the service life of the whole main pump is prolonged.
Based on the foregoing can know, the broken control hydraulic system of double pump switching that this application provided can realize the broken operation of double pump confluence fuel feeding, also can realize the broken operation of single pump fuel feeding, and two pumps work in turn during the broken mode of single pump fuel feeding, can satisfy the pluralism demand of the different operating modes of customer.
Example two
The embodiment of the application further provides an excavator, which comprises the double-pump switching crushing control hydraulic system in any one of the embodiments, so that all beneficial technical effects of the double-pump switching crushing control hydraulic system are achieved, and the detailed description is omitted here.
In one embodiment of the present application, preferably, as shown in fig. 2, the excavator further includes a main valve 7 and an auxiliary, wherein the first main pump 1 is connected with the auxiliary through the main valve 7, the outlet ends of the second main pump 2 and the switch valve 6 are both connected with the main valve 7, and preferably, the auxiliary is a breaking hammer 8.
In this embodiment, the excavator that this application provided can realize the broken operation of double pump confluence fuel feeding, also can realize the broken operation of single pump fuel feeding, and two pumps alternate work under the broken mode of single pump fuel feeding, can satisfy the pluralism demand of the different operating modes of customer.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The utility model provides a broken control hydraulic system is switched to double pump, is applied to engineering machine tool, engineering machine tool includes the main valve and assists the utensil, its characterized in that, broken control hydraulic system is switched to double pump includes: the system comprises a first main pump, a second main pump, a pilot pump, a flow combining valve and a switch valve;
wherein the first main pump is connected with the auxiliary via the main valve; the second main pump is connected with the auxiliary tool through the flow merging valve;
the pilot pump, the switch valve and the flow converging valve are sequentially connected;
the outlet ends of the second main pump and the switch valve are connected with the main valve;
the oil supply crushing of the single pump and the oil supply crushing of the double pump confluence are realized, or the oil supply crushing of two single pumps alternatively is realized under the single pump oil supply crushing mode.
2. The dual pump switching crushing control hydraulic system of claim 1 further comprising a filter, the pilot pump being connected with the switching valve via the filter.
3. The dual pump switching crushing control hydraulic system of claim 1, wherein the switching valve is a solenoid valve.
4. The dual-pump switching crushing control hydraulic system of claim 3, further comprising a controller in communication with the first main pump, the second main pump, the pilot pump, the solenoid valve, respectively.
5. The dual pump switching crushing control hydraulic system of claim 1 further comprising a reservoir tank for providing oil to the first main pump, the second main pump and the pilot pump.
6. The dual-pump switching crushing control hydraulic system according to claim 1, wherein the lines to which the main valve and the auxiliary tool are connected intersect and converge to form a single body with the confluence valve and the auxiliary tool to form a total connection line.
7. The dual pump switching fragmentation control hydraulic system of claim 6 in which a shut-off valve is provided on the main connecting line.
8. The dual pump switching crushing control hydraulic system of claim 1, wherein the first main pump is composed of a plurality of single pump bodies connected in parallel or in series;
the second main pump is composed of a plurality of single pump bodies which are connected in parallel or in series.
9. The dual pump switching crushing control hydraulic system according to any one of claims 1 to 8, characterized in that the accessory is a crushing hammer.
10. An excavator comprising a main valve, an auxiliary and a dual pump switching fragmentation control hydraulic system as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796005.6U CN217974567U (en) | 2022-07-12 | 2022-07-12 | Double-pump switching crushing control hydraulic system and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796005.6U CN217974567U (en) | 2022-07-12 | 2022-07-12 | Double-pump switching crushing control hydraulic system and excavator |
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| CN217974567U true CN217974567U (en) | 2022-12-06 |
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| CN202221796005.6U Active CN217974567U (en) | 2022-07-12 | 2022-07-12 | Double-pump switching crushing control hydraulic system and excavator |
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