CN218374161U - Power control's aftertreatment regeneration hydraulic means and excavator - Google Patents
Power control's aftertreatment regeneration hydraulic means and excavator Download PDFInfo
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- CN218374161U CN218374161U CN202222757801.5U CN202222757801U CN218374161U CN 218374161 U CN218374161 U CN 218374161U CN 202222757801 U CN202222757801 U CN 202222757801U CN 218374161 U CN218374161 U CN 218374161U
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Abstract
The utility model relates to an excavator technical field specifically discloses a power control's aftertreatment regeneration hydraulic means, including hydraulic pump group, main control unit and regeneration ooff valve, regeneration ooff valve's first hydraulic fluid port and the oil-out intercommunication of assisting the pump, second hydraulic fluid port and oil tank intercommunication, third hydraulic fluid port and bypass stop valve control port intercommunication, regeneration ooff valve switch first hydraulic fluid port and third hydraulic fluid port intercommunication or second hydraulic fluid port and third hydraulic fluid port intercommunication are closed or are opened with control bypass stop valve. The utility model provides a aftertreatment regeneration hydraulic means only needs to take regeneration ooff valve outside excavator hydraulic system, can realize preheating in the manual regeneration system short time of excavator, greatly the cost is reduced. And the valve member required by the regeneration switch valve is a low-pressure valve, the required pipeline is a low-pressure pipeline with a small drift diameter, and the required installation space is small. The utility model also discloses an excavator of having this aftertreatment regeneration hydraulic means has above-mentioned technological effect equally.
Description
Technical Field
The utility model relates to an excavator technical field, more specifically say, relate to a power control's aftertreatment regeneration hydraulic means and excavator.
Background
In recent years, the requirements of environmental protection regulations on the emission of engineering machinery engines are increasingly strict, and the importance of engine exhaust after-treatment systems in excavators is highlighted. The excavator post-processing apparatus is provided with a filter device to remove particulate matter, and if the particulate matter continues to accumulate and clog the filter, problems such as an increase in exhaust pressure occur, and therefore it is necessary to remove the accumulated particulate matter and regenerate the filter.
The regeneration of the filter can be divided into active regeneration and passive regeneration, wherein the active regeneration increases the temperature of the air flow to the ignition temperature of the particles by externally adding energy to burn the complemented particles, and the passive regeneration utilizes the self energy of the diesel engine to burn the particles. The active regeneration is divided into automatic regeneration and manual regeneration. The manual regeneration process requires the equipment to be in a standby state, and the exhaust temperature of the equipment is lower under the standby load, so that the requirement of manual regeneration cannot be met, and the load needs to be additionally increased to increase the exhaust temperature. At present, the following three ways of increasing the exhaust temperature by increasing the load are frequently used, the first is to choose to add an auxiliary hydraulic pump for increasing the load; the second one is that an auxiliary valve is connected in parallel with a main valve of the actuating mechanism, a main oil passage of the auxiliary connection blocks the actuating mechanism, and the auxiliary valve of the auxiliary connection is opened during manual regeneration to suppress pressure to achieve the purpose of increasing load; and the third method is to arrange an adjustable overflow valve between a main pump and an oil tank to increase the load.
However, the above-mentioned several modes all need to additionally increase auxiliary devices, and three modes are mostly arranged in the main oil circuit, and all the required rubber hoses are high-pressure rubber hoses, so the problems of high cost and large required installation space generally exist.
In summary, how to effectively solve the problems of high cost of the manual regeneration technology of the excavator and the like is a problem to be solved by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a power control post-treatment regeneration hydraulic apparatus and excavator, which can effectively solve the problem of high cost of manual regeneration technique of excavator by means of the structural design of the power control post-treatment regeneration hydraulic apparatus and excavator.
In order to achieve the above object, the utility model provides a following technical scheme:
a post-processing regeneration hydraulic device for power control comprises a hydraulic pump set and a main control valve group, wherein the hydraulic pump set comprises a main pump for supplying oil to a main oil way of an excavator, an auxiliary pump for supplying oil to a control system and a power proportional valve for controlling the absorption power of the main pump; the main control valve group includes executor control valve, overflow valve and bypass stop valve, the first end of the meso position runner of executor control valve with the overflow valve intercommunication, the second end passes through bypass stop valve and oil tank intercommunication still include:
and a first oil port of the regeneration switch valve is communicated with an oil outlet of the auxiliary pump, a second oil port of the regeneration switch valve is communicated with an oil tank, a third oil port of the regeneration switch valve is communicated with a control port of the bypass stop valve, and the regeneration switch valve switches the communication between the first oil port and the third oil port or the communication between the second oil port and the third oil port so as to control the bypass stop valve to be closed or opened.
Optionally, in the above post-treatment regeneration hydraulic device, the regeneration on-off valve is an electromagnetic on-off valve.
Optionally, in the above post-treatment regeneration hydraulic apparatus, the electromagnetic switch valve is electrically connected to the controller, so as to realize switching between communication between the first oil port and the third oil port or communication between the second oil port and the third oil port under the control of the controller.
Optionally, the post-treatment regeneration hydraulic device further includes a regeneration switch electrically connected to the controller.
Optionally, in the above post-treatment regeneration hydraulic apparatus, the electromagnetic switch valve is a two-position three-way electromagnetic switch valve.
Optionally, in the above post-treatment regeneration hydraulic apparatus, the electromagnetic switch valve includes a first two-position two-way electromagnetic valve and a second two-position two-way electromagnetic valve connected in parallel, the first oil port is an oil inlet of the first two-position two-way electromagnetic valve and an oil inlet of the second two-position two-way electromagnetic valve, the second oil port is an oil outlet of the first two-position two-way electromagnetic valve, and the third oil port is an oil outlet of the second two-position two-way electromagnetic valve.
Optionally, in the above post-treatment regeneration hydraulic device, the regeneration on-off valve is an electro-proportional pressure reducing valve.
Optionally, in the above post-treatment regeneration hydraulic apparatus, the main pump is a variable displacement plunger pump.
Use the utility model provides an after-treatment regeneration hydraulic means, under the regeneration mode, regeneration ooff valve switches to first hydraulic fluid port and third hydraulic fluid port intercommunication, and regeneration ooff valve opens promptly, and control bypass stop valve closes to the flow of master pump can only overflow to the oil tank through the overflow valve, and system operating pressure sets for pressure for the overflow valve. In the regeneration mode, a certain current value is obtained by the power proportional valve according to the temperature setting requirement and the requirement, the main pump is controlled to consume a certain determined power, the determined load is given to the engine, the exhaust temperature is increased to a preset value, and finally manual regeneration is realized. Under normal operating mode, the regeneration ooff valve switches to second hydraulic fluid port and third hydraulic fluid port intercommunication, and the regeneration ooff valve closes promptly, does not have the oil liquid and passes through the regeneration ooff valve flow direction main valve, does not produce any additional influence to the main valve. The current value of the power proportional valve is in a normal working mode state, and the absorbed power is not influenced by any additional effect. The external regeneration switch valve has no influence on the system, and does not influence the excavator actions such as a movable arm, a bucket rod, a bucket, walking, rotation and the like during normal work.
To sum up, the utility model provides a aftertreatment regeneration hydraulic means only needs to take the regeneration ooff valve outside excavator hydraulic system, can realize preheating in the manual regeneration system short time of excavator, and its make full use of hydraulic excavator hydraulic pump group and main control valves need not additionally to increase other auxiliary pumps, high-pressure valve, only need additionally carry on the regeneration ooff valve can, greatly the cost is reduced. And the valve member required by the regeneration switch valve is a low-pressure valve, the required pipeline is a low-pressure pipeline with a small drift diameter, and the required installation space is extremely small.
In order to achieve the above object, the present invention also provides an excavator, which comprises any one of the above post-treatment regeneration hydraulic devices. Since the above-mentioned hydraulic device for post-treatment regeneration has the above-mentioned technical effects, an excavator having the hydraulic device for post-treatment regeneration should also have corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hydraulic apparatus for post-treatment regeneration according to an embodiment of the present invention;
FIG. 2 is a graph of the approximate relationship between the absorbed power of the main pump and the current value of the power proportional valve;
FIG. 3 is a graph of exhaust temperature versus power absorbed by the main pump.
The drawings are numbered as follows:
1-hydraulic pump set, 2-main control valve set, 3-regeneration switch valve, 11-main pump, 12-auxiliary pump, 13-power proportional valve, 21-overflow valve, 22-actuator control valve, and 23-bypass stop valve.
Detailed Description
The embodiment of the utility model discloses power control's aftertreatment regeneration hydraulic means and excavator to reduce manual regeneration technology cost.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a hydraulic apparatus for post-treatment regeneration according to an embodiment of the present invention.
In a specific embodiment, the utility model provides a power control's aftertreatment regeneration hydraulic means, including hydraulic shovel widely used hydraulic pump group 1, main control valve group 2 and the regeneration ooff valve 3 of peripheral hardware. Namely, the hydraulic pump group 1 and the main control valve group 2 are arranged in a conventional structure of the excavator based on power control. The hydraulic pump group 1 includes a main pump 11, an auxiliary pump 12, and a power proportional valve 13. The main pump 11 is used for supplying oil to a main oil path of the excavator, the auxiliary pump 12 is used for supplying oil to the control system, the power proportional valve 13 controls the main pump 11 to absorb power, and the larger the passing current value is, the larger the power absorbed by the main pump 11 is. The primary pump 11 may be embodied as a variable displacement plunger pump, and the secondary pump 12 may be embodied as a gear pump. The main control valve group 2 comprises an actuator control valve 22, an overflow valve 21 and a bypass stop valve 23, wherein the first end of a middle position flow channel of the actuator control valve 22 is communicated with the overflow valve 21, and the second end of the middle position flow channel is communicated with an oil tank through the bypass stop valve 23. When the system pressure exceeds the set pressure of the relief valve 21, the relief valve 21 is opened, and the hydraulic oil overflows, so that the system pressure does not exceed the set pressure of the relief valve 21 all the time. The actuator control valve 22 controls the movement of the boom, the arm, the bucket, the swing, the travel, and the like, and the actuator control valve 22 has an open center structure in which a flow passage is provided at a middle position. And a bypass stop valve 23 is arranged in the middle flow passage, and when the bypass stop valve 23 is opened, hydraulic oil returns to the oil tank, and the system is unloaded.
In the application, based on the most common excavator hydraulic system (positive flow control and negative flow control) in the existing engineering machinery industry, the manual regeneration of the engine can be completed only by carrying the regeneration switch valve 3 outside the valve. The first oil port of the regeneration switch valve 3 is communicated with the oil outlet of the auxiliary pump 12, the second oil port is communicated with the oil tank, the third oil port is communicated with the control port of the bypass stop valve 23, and the regeneration switch valve 3 switches the first oil port to be communicated with the third oil port or the second oil port to be communicated with the third oil port so as to control the bypass stop valve 23 to be closed or opened.
Use the utility model provides a aftertreatment regeneration hydraulic means, under the regeneration mode, regeneration ooff valve 3 switches to first hydraulic fluid port and third hydraulic fluid port intercommunication, and regeneration ooff valve 3 opens promptly, and control bypass stop valve 23 closes to the flow of main pump 11 can only overflow to the oil tank through overflow valve 21, and system operating pressure sets for pressure for overflow valve 21. In the regeneration mode, according to the temperature setting requirement, the power proportional valve 13 obtains a certain current value according to the requirement, controls the main pump 11 to consume a certain power, gives a certain load to the engine, increases the exhaust temperature to a preset value, and finally realizes manual regeneration. Under the normal operating mode, regeneration ooff valve 3 switches to second hydraulic fluid port and third hydraulic fluid port intercommunication, and regeneration ooff valve 3 closes promptly, does not have the oil liquid and passes through regeneration ooff valve 3 flow direction main valve, does not produce any additional influence to the main valve. The current value of the power proportional valve 13 is in a normal working mode state, and the absorbed power is not affected by any additional effect. The externally connected regeneration switch valve 3 has no influence on the system, and does not influence the excavator actions such as a movable arm, an arm, a bucket, walking, rotation and the like during normal work.
To sum up, the utility model provides a post-processing regeneration hydraulic means only needs to take regeneration ooff valve 3 outside excavator hydraulic system, can realize preheating in the manual regeneration system short time of excavator. The temperature rise of the engine of the excavator and the consumed power of the hydraulic pump are in an approximate linear relationship, and the method comprises the following steps:
ΔT∝P
in the formula, P is consumed power of a hydraulic system;
ΔT the engine temperature rises.
The utility model discloses use 11 absorbed power of main pump as the control objective, control its maximum absorbed power through the current value of control power proportional valve 13. By blocking the middle flow path of the main valve, the displacement of the main pump 11 is maintained at the maximum state under the absorbed power, and the hydraulic oil overflow and the hydraulic oil path pressure are maintained at the overflow pressure. Finally, the excavator is additionally provided with a load in a standby state, and the exhaust temperature is increased. The utility model discloses only realize preheating in the manual regeneration system short time of excavator through 11 powers of control main pump, the control object is power proportional valve 13 current values, is single control object, and is simple controllable.
Furthermore, the utility model provides a post-processing regeneration hydraulic means can realize the stepless regulation and control of excavator manual regeneration system preheating temperature. The approximate relationship between the absorbed power of the main pump 11 and the current value of the power proportional valve 13 is shown in fig. 2. The approximate relationship of the exhaust gas temperature and the power absorbed by the main pump 11 is shown in fig. 3. As shown in fig. 2 to 3, the exhaust temperature and the current value of the power proportional valve 13 are approximately linear. Therefore, each preheating temperature has a specific current value of the power proportional valve 13, and stepless regulation and control of the preheating temperature of the manual regeneration system of the excavator can be realized by adjusting the current value of the power proportional valve 13.
Additionally, the utility model provides a aftertreatment regeneration hydraulic means make full use of hydraulic shovel hydraulic pump package 1 and main control valve group 2, need not additionally to increase other auxiliary pumps, high-pressure valve, only need additionally carry on regeneration ooff valve 3 can, greatly the cost is reduced. And the valve member required by the regeneration switch valve 3 is a low-pressure valve, the required pipeline is a low-pressure pipeline with a small drift diameter, and the required installation space is extremely small. Furthermore, the utility model discloses a load simulation under the hydraulic shovel standby state, through the break-make of regeneration ooff valve 3 control bypass stop valve 23 promptly, when the excavator standby does not have other actions promptly and does not have the load, close bypass stop valve 23, the overflow valve 21 overflow is passed through to main pump 11 flow, and system pressure approximately equals overflow valve 21 settlement pressure, and overflow valve 21 becomes the load of system, has realized the load simulation under the standby state.
In one embodiment, the regenerative switching valve 3 is an electromagnetic switching valve. The electromagnetic switch valve is completely switched on and off before and after receiving the current value, and a valve core is not in a half-open state.
Further, the electromagnetic switch valve is electrically connected with the controller to realize the switching of the communication between the first oil port and the third oil port or the communication between the second oil port and the third oil port under the control of the controller. The controller can automatically control the operation of the electromagnetic opening/closing valve.
Still further, a regeneration switch is included that is electrically connected to the controller. By setting the regeneration switch, when the regeneration switch is turned on, the regeneration mode is entered, the controller receives a signal, and the controller judges that the system enters the regeneration mode. In the regeneration mode, the controller energizes the regeneration solenoid valve, the valve core moves, the first oil port is communicated with the third oil port, the regeneration solenoid valve is opened, and the bypass stop valve 23 is closed. The flow of the main pump 11 can only overflow to the oil tank through the overflow valve 21, and the system working pressure is set for the overflow valve 21. In the regeneration mode, the controller controls the main pump 11 to absorb power at a specific current value to the power proportional valve 13. The controller determines that the system enters a normal operation mode when the regeneration switch is turned off. Under the normal operating mode, regeneration ooff valve 3 has no current value, is in the closed condition, does not accept the parameter that regeneration mode set up, does not influence hydraulic system normal work. Through the setting of regeneration switch, be convenient for relevant personnel to operate.
In one embodiment, the electromagnetic switch valve is a two-position three-way electromagnetic switch valve, and is provided with three oil ports, namely an input port P, an output port X and an oil drainage port T. The input port P, i.e., the first port, is connected to the auxiliary pump 12 to receive the flow and pilot pressure from the auxiliary pump 12, and the output port X, i.e., the third port, is an output port of the regeneration switch valve 3, and is connected to a control oil path of the bypass stop valve 23 of the main control valve group 2 to control the on/off of the control oil path. And the oil drainage port T is a second oil port and is connected with the oil tank. The electromagnetic switch valve with two-position three-way is adopted, the structure is simple, and the switching is convenient.
In one embodiment, the electromagnetic switch valve includes a first two-position two-way electromagnetic valve and a second two-position two-way electromagnetic valve, the first oil port is an oil inlet of the first two-position two-way electromagnetic valve, the second oil port is an oil outlet of the first two-position two-way electromagnetic valve, and the third oil port is an oil outlet of the second two-position two-way electromagnetic valve and an oil inlet of the second two-position two-way electromagnetic valve. Namely, the function of the two-position three-way electromagnetic switch valve is realized through the combination of two-position two-way electromagnetic valves. The first two-position two-way electromagnetic valve is opened, when the second two-position two-way electromagnetic valve is closed, the first oil port is communicated with the third oil port, and the bypass stop valve 23 is closed; the first two-position two-way solenoid valve is closed, and when the second two-position two-way solenoid valve is opened, the second oil port is communicated with the third oil port, and the bypass stop valve 23 is opened.
In one embodiment, the regenerative switching valve 3 is an electro proportional pressure reducing valve. The electric proportional pressure reducing valve can receive the current value of the controller to realize on-off, thereby controlling the on-off of the bypass stop valve 23.
The utility model provides a aftertreatment regeneration hydraulic means is applicable to most hydraulic shovel, and this excavator hydraulic system should contain the main pump 11 that has power proportional valve 13, has the executor switching-over valve that the meso position was provided with the runner, connects the bypass stop valve 23 of meso position runner, the control valve of overflow valve 21. The utility model discloses only need outside excavator hydraulic system take regeneration switch valve 3 can.
The utility model also provides an excavator, this excavator includes arbitrary aftertreatment regeneration hydraulic means in the above-mentioned embodiment based on the power control's that provides in the above-mentioned embodiment aftertreatment regeneration hydraulic means. Since the excavator adopts the post-processing regeneration hydraulic device in the above embodiment, please refer to the above embodiment for the beneficial effects of the excavator.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A post-processing regeneration hydraulic device for power control comprises a hydraulic pump set and a main control valve group, wherein the hydraulic pump set comprises a main pump for supplying oil to a main oil way of an excavator, an auxiliary pump for supplying oil to a control system and a power proportional valve for controlling the absorption power of the main pump; the main control valve group includes executor control valve, overflow valve and bypass stop valve, the first end of well position runner of executor control valve with the overflow valve intercommunication, the second end passes through bypass stop valve and oil tank intercommunication, its characterized in that still includes:
and a first oil port of the regeneration switch valve is communicated with an oil outlet of the auxiliary pump, a second oil port of the regeneration switch valve is communicated with an oil tank, a third oil port of the regeneration switch valve is communicated with a control port of the bypass stop valve, and the regeneration switch valve switches the communication between the first oil port and the third oil port or the communication between the second oil port and the third oil port so as to control the bypass stop valve to be closed or opened.
2. The aftertreatment regeneration hydraulic device of claim 1, wherein the regeneration on-off valve is an electromagnetic on-off valve.
3. The hydraulic post-treatment regeneration device according to claim 2, wherein the electromagnetic switch valve is electrically connected to a controller to switch the communication between the first oil port and the third oil port or the communication between the second oil port and the third oil port under the control of the controller.
4. The aftertreatment regeneration hydraulic device of claim 3, further comprising a regeneration switch electrically connected to the controller.
5. The aftertreatment regeneration hydraulic device of claim 2, wherein the electromagnetic on-off valve is a two-position, three-way electromagnetic on-off valve.
6. The hydraulic device for aftertreatment regeneration of claim 2, wherein the electromagnetic switch valve comprises a first two-position two-way electromagnetic valve and a second two-position two-way electromagnetic valve which are connected in parallel, the first oil port is an oil inlet of the first two-position two-way electromagnetic valve and an oil inlet of the second two-position two-way electromagnetic valve, the second oil port is an oil outlet of the first two-position two-way electromagnetic valve, and the third oil port is an oil outlet of the second two-position two-way electromagnetic valve.
7. The aftertreatment regeneration hydraulic device of claim 1, wherein the regeneration on-off valve is an electro proportional pressure reducing valve.
8. The aftertreatment regeneration hydraulic device of any one of claims 1-7, wherein the main pump is a variable displacement ram pump.
9. An excavator comprising an aftertreatment regenerative hydraulic device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222757801.5U CN218374161U (en) | 2022-10-19 | 2022-10-19 | Power control's aftertreatment regeneration hydraulic means and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222757801.5U CN218374161U (en) | 2022-10-19 | 2022-10-19 | Power control's aftertreatment regeneration hydraulic means and excavator |
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| Publication Number | Publication Date |
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| CN218374161U true CN218374161U (en) | 2023-01-24 |
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| CN202222757801.5U Active CN218374161U (en) | 2022-10-19 | 2022-10-19 | Power control's aftertreatment regeneration hydraulic means and excavator |
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| CN (1) | CN218374161U (en) |
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2022
- 2022-10-19 CN CN202222757801.5U patent/CN218374161U/en active Active
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