CN216199511U - System pressure simulation system of hydraulic pump, matching detection system and engineering machinery - Google Patents
System pressure simulation system of hydraulic pump, matching detection system and engineering machinery Download PDFInfo
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- CN216199511U CN216199511U CN202122587148.8U CN202122587148U CN216199511U CN 216199511 U CN216199511 U CN 216199511U CN 202122587148 U CN202122587148 U CN 202122587148U CN 216199511 U CN216199511 U CN 216199511U
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Abstract
The utility model provides a system pressure simulation system of a hydraulic pump, a matching detection system and engineering machinery. The simulation system of the structure simulates the load change of the excavator through the change of the system pressure, the output power of the hydraulic pump automatically changes along with the system pressure, when the output power of the hydraulic pump is larger than the output power of the engine, the engine can stall or stop, whether the engine stalls or stops is observed through observing the rotating speed of the engine or observing the running condition of the engine on a display screen on engineering machinery, and whether the output power of the hydraulic pump under each system pressure is matched with the power of the engine with a specific model is detected. If the engine has no speed drop or stop phenomenon under the pressure of each system, the output power of the hydraulic pump is matched with the engine with a specific model; otherwise, the output power of the hydraulic pump is not matched with the engine of a specific model.
Description
Technical Field
The utility model relates to the technical field of power detection of hydraulic pumps, in particular to a system pressure simulation system of a hydraulic pump, a matching detection system and engineering machinery.
Background
In the field of engineering machinery, such as an excavator, a hydraulic pump, an engine, a reversing valve and a hydraulic oil tank are arranged on the excavator, an output shaft of the engine is connected with an output shaft of the hydraulic pump, the reversing valve is connected with the hydraulic pump, the hydraulic pump is connected with an execution mechanism, when the hydraulic pump works, the engine drives the hydraulic pump to rotate, and the hydraulic pump sucks oil from the hydraulic oil tank and conveys the oil to the execution mechanism. The system pressure depends on the load, the system pressure is different under different loads, and the output power of the hydraulic pump is changed along with the system pressure. Under different loads and system pressures, the output power of the pump needs to be matched with the power of the engine to ensure that the power of the engine is fully utilized and prevent the output power of the pump from exceeding the power of the engine to cause the stall or stop of the engine.
Most excavators do not have a matching detection system for the model of the engine and the pump, and the output power of the pump can only obtain the value of a fixed point, and whether the output power of the pump is matched with the engine power or not cannot be detected under the condition of different system pressures.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to overcome the defect that it is impossible to detect whether the output power of the pump matches the engine power at different system pressures in the prior art.
Therefore, the utility model provides a system pressure simulation system of a hydraulic pump, which comprises a flow control valve; the hydraulic control system comprises an oil inlet pipeline, a first oil return pipeline and a pressure detection device, wherein an oil inlet of a flow control valve is connected with an oil outlet of a hydraulic pump through the oil inlet pipeline, the first oil return pipeline is connected with an oil return port of the flow control valve, and the flow control valve adjusts the opening degree of the flow control valve to control the oil pressure on the oil inlet pipeline; the pressure detection device is arranged on the oil inlet pipeline and used for detecting the oil pressure on the oil inlet pipeline.
Optionally, the system pressure simulation system of the hydraulic pump further includes a control device, the pressure detection device and the flow control valve are electrically connected to the control device, and the control device starts to control the opening of the flow control valve according to a detection signal of the pressure detection device.
Optionally, in the system pressure simulation system of the hydraulic pump, the pressure detection device is a trigger device of the control device.
Optionally, in the system pressure simulation system of the hydraulic pump, the flow control valve is a proportional solenoid valve or an electrically controlled throttle valve.
Optionally, the system pressure simulation system of the hydraulic pump further includes a directional control valve, an oil outlet of the directional control valve is connected to an oil inlet of the flow control valve through the oil inlet pipeline, and a first oil inlet of the directional control valve is adapted to be connected to an oil outlet of the hydraulic pump.
Optionally, the system pressure simulation system of the hydraulic pump further includes a first hydraulic oil tank and a second oil return line; an oil outlet of the first oil return pipeline is connected with a second oil inlet of the direction control valve; and the second oil return pipeline is connected with an oil return port of the directional control valve and the first hydraulic oil tank.
The utility model provides a matching detection system, which comprises a system pressure simulation system of the hydraulic pump.
Optionally, the matching detection system further comprises
A second hydraulic tank;
the oil suction port of the hydraulic pump is connected with the second hydraulic oil tank; the oil outlet of the hydraulic pump is connected with the oil inlet pipeline;
and the output shaft of the engine is connected with the output shaft of the hydraulic pump.
Optionally, in the above matching detection system, the hydraulic pump is a variable displacement pump.
The utility model provides a construction machine comprising the matching detection system described in any one of the above.
The technical scheme of the utility model has the following advantages:
1. the system pressure simulation system of the hydraulic pump provided by the utility model controls the oil pressure on the oil inlet pipeline by controlling the opening of the flow control valve, and the oil pressure on the oil inlet pipeline can be displayed and observed in real time through the pressure detection device. In order to observe whether the output power of a pump is matched with the power of an engine under different pressures, a flow control valve is operated to change the opening degree from small to large and then from large to small, so that the flow of hydraulic oil in the flow control valve changes from small to large and then from large to small, the flow of the hydraulic oil changes to change the system pressure from large to small and then from small to large, two cycles of each system pressure are realized, the load change of an excavator is simulated through the change of the system pressure, the output power of a hydraulic pump automatically changes along with the system pressure, and whether the engine is decelerated or stopped is observed through observing the rotating speed of the engine or observing the running condition of the engine on a display screen on engineering machinery, so that whether the output power of the hydraulic pump under each system pressure is matched with the power of the engine of a specific model is detected. If the engine has no speed drop or stop phenomenon under each system pressure, the output power of the hydraulic pump is matched with the engine of a specific model, and the power of the engine can be fully utilized. If the engine is in a speed drop or stop state under the pressure of each system, the output power of the hydraulic pump is not matched with that of the engine of a specific model.
2. The system pressure simulation system of the hydraulic pump provided by the utility model has the advantages that the flow control valve is a proportional electromagnetic valve, the proportional electromagnetic valve can continuously and proportionally control the pressure, flow or direction of oil flow in a remote way according to an electric signal input by the controller, the proportional electromagnetic valve has pressure compensation performance, and the output pressure and flow can not be influenced by load change.
3. According to the system pressure simulation system of the hydraulic pump, the directional control valve is the reversing valve so as to realize communication and directional control of the oil ports, and the reversing valve is installed on the excavator so as to realize communication and control of the oil paths of the actuating mechanisms.
4. The system pressure simulation system of the hydraulic pump further comprises a first hydraulic oil tank and a second oil return pipeline; the hydraulic oil flows through the first oil return pipeline, the reversing valve and the second oil return pipeline in sequence and is recycled to the first hydraulic oil tank, so that the cyclic recycling of the hydraulic oil is realized.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a matching detection system provided in embodiment 2 of the present invention;
FIG. 2 is a graph of power performance of a hydraulic pump;
fig. 3 is a graph showing the output flow rate of the hydraulic pump.
Description of reference numerals:
1-a flow control valve; 21-oil inlet pipeline; 22-a first oil return line; 23-a second return line; 24-an oil outlet pipeline; 25-an oil suction line; 3-a pressure detection device; 4-a control device; 5-a directional control valve; 6-a first hydraulic tank; 7-a hydraulic pump; 8-a second hydraulic oil tank.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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, but 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 invention. 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 invention, it should 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a system pressure simulation system of a hydraulic pump, referring to fig. 1, which includes a flow control valve 1, an oil inlet pipeline 21, a first oil return pipeline 22, and a pressure detection device 3. An oil inlet of the flow control valve is connected with an oil outlet of the hydraulic pump through an oil inlet pipeline, a first oil return pipeline is connected with an oil return port of the flow control valve, and the opening of the flow control valve 1 is adjusted to control the oil pressure on the oil inlet pipeline 21; the pressure detection device 3 is arranged on the oil inlet pipeline 21, and the pressure detection device 3 is used for detecting the oil pressure on the oil inlet pipeline 21.
The system pressure analog system of the hydraulic pump of this structure, during the use, will advance oil pipe way 21 and connect the oil-out of hydraulic pump 7, the 7 output shafts of engine output shaft hydraulic pump, there is hydraulic oil output to advancing oil pipe way 21 in the hydraulic pump 7 when, pressure measurement device 3 detects pressure signal, the change of flow control valve aperture size, pressure in advancing oil pipe way 21, hydraulic pump 7's system pressure is the inverse ratio with flow 1's aperture and flow promptly, the aperture size through controlling flow control valve controls the oil pressure on advancing the oil pipe way, advance the oil pressure on the oil pipe way and pass through pressure measurement device and can show the observation in real time. In order to observe whether the output power of the pump is matched with the engine power under different pressure conditions, the flow control valve 1 is operated to change the opening degree from small to large and then from large to small, so that the flow rate of the hydraulic oil in the flow control valve 1 changes from large to small and then from small to large, and fig. 3 is a graph showing the change of the output flow rate of the hydraulic pump 7 along with time; the hydraulic oil flow changes to change the system pressure from large to small and then from small to large, so that two cycles of the system pressure are realized, the change of the excavator load is simulated through the change of the system pressure, the output power of the hydraulic pump 7 automatically changes along with the system pressure, and fig. 2 is a power performance curve diagram of the hydraulic pump. When the output power of the hydraulic pump 7 is greater than the output power of the engine, the engine may stall or stop, and whether the engine stalls or stops is observed by observing the engine speed or observing the operating condition of the engine on a display screen on the engineering machinery, so as to detect whether the output power of the hydraulic pump 7 under each system pressure matches with the power of the engine of a specific model. If the engine has no speed drop or stop phenomenon under each system pressure, the output power of the hydraulic pump 7 is matched with the engine of a specific model, and the power of the engine can be fully utilized. If the engine is in a stall or stop state under each system pressure, the output power of the hydraulic pump 7 is not matched with that of the engine of a specific model.
It is also possible to operate the flow control valve 1 such that the opening degree thereof changes from large to small and then from small to large, so that the hydraulic oil flow rate in the flow control valve 1 changes from small to large and then from large to small, as long as one cycle of the hydraulic oil flow rate from small to large or from large to small can be completed to detect whether the output power of the hydraulic pump 7 at each system pressure matches the engine power of a specific model.
Furthermore, the system pressure simulation system of the hydraulic pump further comprises a control device, the control device 4 is electrically connected with the pressure detection device 3 and the flow control valve 1, and the control device 4 starts to control the opening of the flow control valve 1 according to a detection signal of the pressure detection device 3. The pressure detection device 3 is a trigger device of the control device, when the pressure detection device 3 detects a pressure signal, the pressure signal is transmitted to the control device 4, and the control device 4 receives the pressure signal and then controls the opening of the flow control valve 1 to change.
Optionally, the flow control valve 1 is a proportional solenoid valve or an electrically controlled throttle valve, the pressure detection device 3 is a pressure sensor, the control device 4 is a controller, and the controller is an existing conventional controller. For example, the flow control valve 1 is a proportional solenoid valve, the pressure sensor detects a pressure signal and transmits the pressure signal to the controller, the proportional solenoid valve can continuously and proportionally control the pressure, flow rate or direction of the oil flow at a remote distance according to an electric signal input by the controller, and the proportional solenoid valve has a pressure compensation performance, and the output pressure and flow rate can be free from the influence of load variation. The pressure detection means 3 may also be a pressure detector.
Referring to fig. 1, the system pressure simulation system of the hydraulic pump further includes a directional control valve 5, an oil outlet of the directional control valve 5 is connected to an oil inlet of the flow control valve 1 through an oil inlet pipeline 21, and a first oil inlet of the directional control valve 5 is adapted to be connected to an oil outlet of the hydraulic pump 7. Optionally, the engineering machine is an excavator, the directional control valve 5 is a reversing valve, for example, a three-position six-way reversing valve, so as to achieve communication and directional control of the plurality of oil ports, and the three-position six-way reversing valve is mounted on the excavator, so as to achieve communication and control of the plurality of execution mechanism oil paths.
Further, the system pressure simulation system of the hydraulic pump further comprises a first hydraulic oil tank 6 and a second oil return pipeline 23; an oil outlet of the first oil return pipeline 22 is connected with a second oil inlet of the reversing valve; the second oil return pipeline 23 is connected with an oil return port of the reversing valve and the first hydraulic oil tank 6. The hydraulic oil flows through the first oil return pipeline 22, the reversing valve and the second oil return pipeline 23 in sequence and is recycled to the first hydraulic oil tank 6, so that the hydraulic oil is recycled.
Example 2
The present embodiment provides a matching detection system including the system pressure simulation system of the hydraulic pump in embodiment 1, the second hydraulic tank 8, the hydraulic pump 7, and the engine (not shown in the figure). An oil suction port of the hydraulic pump 7 is connected with the second hydraulic oil tank 8; the oil outlet of the hydraulic pump 7 is connected with the oil inlet pipeline 21. The output shaft of the engine is connected to the output shaft of the hydraulic pump 7.
Further, the matching detection system further comprises an oil outlet pipe 24 and an oil suction pipe 25. Two ends of the oil outlet pipeline 24 are respectively connected with an oil outlet of the hydraulic pump 7 and an oil inlet of the reversing valve, and two ends of the oil suction pipeline 25 are respectively connected with an oil suction port of the second hydraulic oil tank 8 and an oil suction port of the hydraulic pump 7. The hydraulic pump 7 is a variable displacement pump, and the flow rate thereof is adjustable.
The hydraulic pump 7, the second hydraulic oil tank 8, the oil outlet pipeline 24, the reversing valve, the second oil return pipeline 23 and the first hydraulic oil tank 6 are all arranged on the excavator, the auxiliary pipeline of the excavator is connected with each actuating mechanism, the actuating mechanism at the front end of the auxiliary pipeline is removed, the oil inlet pipeline 21, the flow control valve 1, the first oil return pipeline 22 and the control device are connected on the auxiliary pipeline, the engine runs to drive the hydraulic pump 7 to rotate, the hydraulic pump 7 sucks oil from the second hydraulic oil tank 8 to form pressure oil which is output to the reversing valve through the oil outlet pipeline 24, after the reversing valve is opened, the hydraulic oil flows to the oil inlet pipeline 21, the pressure sensor detects pressure signals and transmits the pressure signals to the controller, the controller controls the opening of the proportional electromagnetic valve to gradually increase or gradually decrease so as to control the hydraulic oil flow in the proportional electromagnetic valve and the system pressure to gradually change so as to observe whether the engine is decelerated or stopped under each system pressure, to detect whether the output power of the hydraulic pump 7 matches a specific model of engine at each system pressure.
Example 3
The present embodiment provides a construction machine including the matching detection system of embodiment 2.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. A system pressure simulation system of a hydraulic pump is characterized by comprising
A flow control valve (1);
the hydraulic control system comprises an oil inlet pipeline (21) and a first oil return pipeline (22), wherein an oil inlet of the flow control valve (1) is connected with an oil outlet of a hydraulic pump (7) through the oil inlet pipeline (21), the first oil return pipeline (22) is connected with an oil return port of the flow control valve (1), and the flow control valve (1) adjusts the opening degree of the flow control valve to control the oil pressure on the oil inlet pipeline (21);
and the pressure detection device (3) is arranged on the oil inlet pipeline (21) and is used for detecting the oil pressure on the oil inlet pipeline (21).
2. The system pressure simulation system of a hydraulic pump according to claim 1, further comprising a control device (4), wherein the pressure detection device (3) and the flow control valve (1) are electrically connected to the control device (4), and the control device (4) starts to control the opening of the flow control valve (1) according to a detection signal of the pressure detection device (3).
3. The system pressure simulation system of a hydraulic pump according to claim 2, characterized in that the pressure detection means (3) is a triggering means of the control means.
4. System pressure simulation system of a hydraulic pump according to any of claims 1-3, characterized in that the flow control valve (1) is a proportional solenoid valve or an electrically controlled throttle valve.
5. The system pressure simulation system of a hydraulic pump according to any one of claims 1-3, further comprising a directional control valve (5), wherein an oil outlet of the directional control valve (5) is connected to an oil inlet of the flow control valve (1) through the oil inlet line (21), and a first oil inlet of the directional control valve (5) is adapted to be connected to an oil outlet of a hydraulic pump (7).
6. The system pressure simulation system of a hydraulic pump according to claim 5, further comprising a first hydraulic oil tank (6) and a second return line (23); an oil outlet of the first oil return pipeline (22) is connected with a second oil inlet of the directional control valve (5); and the second oil return pipeline (23) is connected with an oil return port of the directional control valve (5) and the first hydraulic oil tank (6).
7. A matching detection system, characterized by a system pressure simulation system including the hydraulic pump of any one of claims 1 to 6.
8. The match detection system of claim 7, further comprising
A second hydraulic tank (8);
the oil suction port of the hydraulic pump (7) is connected with the second hydraulic oil tank (8); an oil outlet of the hydraulic pump (7) is connected with the oil inlet pipeline (21);
and the output shaft of the engine is connected with the output shaft of the hydraulic pump (7).
9. The match detection system according to claim 8, characterized in that the hydraulic pump (7) is a variable pump.
10. A working machine, characterized in that it comprises a matching detection system according to any of claims 7-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122587148.8U CN216199511U (en) | 2021-10-26 | 2021-10-26 | System pressure simulation system of hydraulic pump, matching detection system and engineering machinery |
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| CN202122587148.8U CN216199511U (en) | 2021-10-26 | 2021-10-26 | System pressure simulation system of hydraulic pump, matching detection system and engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309363A (en) * | 2023-11-30 | 2023-12-29 | 广东智能无人系统研究院(南沙) | Full sea depth hydraulic simulation test system and method based on water-based working medium |
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2021
- 2021-10-26 CN CN202122587148.8U patent/CN216199511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309363A (en) * | 2023-11-30 | 2023-12-29 | 广东智能无人系统研究院(南沙) | Full sea depth hydraulic simulation test system and method based on water-based working medium |
| CN117309363B (en) * | 2023-11-30 | 2024-03-19 | 广东智能无人系统研究院(南沙) | Full sea depth hydraulic simulation test system and method based on water-based working medium |
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