CN217354964U - Energy-saving hydraulic system of multi-stage cylinder control horizontal telescopic arm hydraulic pump - Google Patents
Energy-saving hydraulic system of multi-stage cylinder control horizontal telescopic arm hydraulic pump Download PDFInfo
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- CN217354964U CN217354964U CN202221132296.9U CN202221132296U CN217354964U CN 217354964 U CN217354964 U CN 217354964U CN 202221132296 U CN202221132296 U CN 202221132296U CN 217354964 U CN217354964 U CN 217354964U
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Abstract
The utility model discloses an energy-conserving hydraulic system of horizontal flexible arm hydraulic pump of multistage cylinder control, hydraulic tank connects the oil absorption mouth of variable pump, and the oil-out of variable pump connects the front end of pressing the oil filter, and the tail end of pressing the oil filter connects the oil inlet of multiple unit valve, and the working port of multiple unit valve connects the locking valves, and the locking valves connects multistage hydraulic cylinder, is provided with the pressure measuring point on the pipeline between multiple unit valve and the locking valves, and the pressure measuring point sets up the pressure measuring device; the multi-way valve and the locking valve group are connected with an overflow valve group in a shunting manner, an oil return port of the overflow valve group and an oil return port of the multi-way valve are connected to an oil return main pipeline in parallel, the oil return main pipeline is connected with an inlet of a cooler, an outlet of the cooler is connected with an inlet of an oil return filter, and the tail end of the oil return filter is connected to a hydraulic oil tank. The utility model discloses a variable pump and the multistage pneumatic cylinder of the flexible arm of system component control level of arranging with it, the consumption of the to a great extent reduction energy under the operating condition who guarantees reliably stably.
Description
Technical Field
The utility model relates to a multistage pneumatic cylinder propulsion system technical field especially relates to an energy-conserving hydraulic system of multistage jar control horizontal flexible arm hydraulic pump.
Background
When a hydraulic system works, energy loss on power often exists, so that the total efficiency of the system is reduced; moreover, the lost energy part can be converted into heat energy under the action of energy conservation, so that the temperature of hydraulic oil is increased, the oil is deteriorated, and finally, the hydraulic equipment can be possibly broken down. The multistage hydraulic cylinder has long working stroke, and can be installed at a short distance when not working, so that the multistage hydraulic cylinder is suitable for occasions with limited installation distance and long working stroke requirements. The control mode of the multi-stage hydraulic cylinder is mostly open system control. When the working propelling speed and the push-pull force of the horizontal telescopic arm of the multi-stage hydraulic cylinder are required to be fixed, the flow demand of the propelling working condition of the multi-stage hydraulic cylinder is high, the working pressure of the multi-stage hydraulic cylinder is high in the retracting working condition, and the consumed power of the hydraulic pump is the product of the flow and the pressure, so that when the fixed-displacement pump is selected to rotate at a fixed speed to provide a power source for a system, the power consumption is high. In summary, when designing a hydraulic system, in addition to meeting the use requirement, it should be fully considered how to reduce the power loss of the system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy-conserving hydraulic system of flexible arm hydraulic pump of multistage jar control level, through the multistage hydraulic cylinder of the flexible arm of the system component control level of variable pump and collocation with it, guaranteeing to a great extent the consumption that reduces the energy under reliable stable operating condition.
In order to achieve the above object, the utility model provides a following scheme:
an energy-saving hydraulic system for a multi-cylinder controlled horizontal telescopic boom hydraulic pump, the system comprising: the hydraulic oil tank is connected with an oil suction port of the variable pump, an oil outlet of the variable pump is connected with the front end of the oil pressing filter, the tail end of the oil pressing filter is connected with an oil inlet of a multi-way valve, a working port of the multi-way valve is connected with a locking valve set, the locking valve set is connected with the multi-stage hydraulic cylinder, a pipeline between the multi-way valve and the locking valve set is provided with a pressure measuring point, and the pressure measuring point is provided with the pressure measuring device; the hydraulic oil tank is characterized in that an overflow valve group is connected with the multi-way valve and the locking valve group in a shunting manner, an oil return port of the overflow valve group and an oil return port of the multi-way valve are connected to an oil return main pipeline in parallel, the oil return main pipeline is connected with an inlet of a cooler, an outlet of the cooler is connected with an inlet of an oil return filter, and the tail end of the oil return filter is connected to the hydraulic oil tank.
Further, the variable pump is a load-sensitive variable pump, a constant-power variable pump or an electric proportional control variable pump.
Furthermore, the multi-way valve is a load-sensitive multi-way valve, a switch valve or a proportional valve, and the multi-way valve is matched with the variable pump for model selection.
Further, the pressure measuring device is a shock-proof pressure gauge or a pressure sensor.
Further, the variable pump is connected with a driving motor.
Furthermore, the multi-way valve is provided with two working ports, the two working ports are correspondingly connected with two locking valve groups, the two locking valve groups are correspondingly connected with two multi-stage hydraulic cylinders, and the pressure measuring points are two groups.
Further, the two groups of pressure measuring points are connected to a shuttle valve, and the shuttle valve is connected to a pressure measuring device and used for carrying out combined pressure measurement on the working pressures of the two multi-stage hydraulic cylinders.
Furthermore, a liquid level meter is arranged in the hydraulic oil tank.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the utility model provides an energy-conserving hydraulic system of horizontal flexible arm hydraulic pump of multistage cylinder control, improve the horizontal flexible arm of traditional fixed-displacement pump control into the multistage pneumatic cylinder of the horizontal flexible arm of variable pump and system component control that matches with it, switch the control signal of the multi-channel valve when the multistage pneumatic cylinder switches operating condition and can realize the stable speed operation of horizontal flexible arm; the control to multistage pneumatic cylinder rationally chooses for use the variable pump can guarantee to a great extent that reliable stable operating condition reduces the consumption of the energy, has also satisfied the requirement of building energy-concerving and environment-protective type society simultaneously, has improved economic nature and practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 inventive labor.
Fig. 1 is a schematic structural view of an energy-saving hydraulic system of a multi-stage cylinder control horizontal telescopic boom hydraulic pump according to an embodiment of the present invention;
reference numerals are as follows: 1. a hydraulic oil tank; 2. a drive motor; 3. a variable displacement pump; 4. pressing oil filter; 5. a multi-way valve; 6. a shuttle valve; 7. a locking valve group; 8. a multi-stage hydraulic cylinder; 9. pressure measuring points; 10. a pressure measuring device; 11. an overflow valve bank; 12. a cooler; 13. an oil return filter; 14. a liquid level meter.
Detailed Description
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.
The utility model aims at providing an energy-conserving hydraulic system of flexible arm hydraulic pump of multistage jar control level, the multistage pneumatic cylinder of the flexible arm of system component control level through variable pump and collocation with it, the consumption of the to a great extent reduction energy under the operating condition who guarantees reliably stable.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, an embodiment of the present invention provides an energy-saving hydraulic system of a multi-stage cylinder control horizontal telescopic boom hydraulic pump, including a hydraulic oil tank 1, a variable pump 3, a pressure oil filter 4, a multi-stage hydraulic cylinder 8, a cooler 12, an oil return filter 13 and a pressure measuring device 10, where the hydraulic oil tank 1 is connected to an oil suction port of the variable pump 3, an oil outlet of the variable pump 3 is connected to a front end of the pressure oil filter 4, a tail end of the pressure oil filter 4 is connected to an oil inlet (port) of a multi-way valve 5, a working port of the multi-way valve 5 is connected to a locking valve set 7, the locking valve set 7 is connected to the multi-stage hydraulic cylinder 8, a pressure measuring point 9 is provided on a pipeline between the multi-way valve 5 and the locking valve set 7, and the pressure measuring point 9 is provided on the pressure measuring device 10; the multi-way valve 5 with the shut of locking valves 7 is connected with overflow valves 11, the oil return port (T mouth) of overflow valves 11 and the oil return port (R mouth) of multi-way valve 5 connect in parallel to the total pipeline of oil return, the total pipeline of oil return and the access connection of cooler 12, the export of cooler 12 and the access connection of oil return filter 13, the tail end of oil return filter 13 is connected to hydraulic tank 1.
The variable pump 3 is a load-sensitive variable pump, a constant-power variable pump or an electric proportional control variable pump. The multi-way valve 5 is a load-sensitive multi-way valve, a switch valve or a proportional valve, and the multi-way valve is matched with the variable pump for model selection and matched for use according to the working condition of the telescopic arm multi-stage cylinder. In one embodiment, a load-sensitive variable pump is taken as an example and is matched with a load-sensitive multi-way valve for use, the running speed of an execution element can be adjusted in a stepless manner by controlling the current value of the load-sensitive multi-way valve, the working pressure of the execution element is completely matched with the pressure provided by the load-sensitive pump, and the waste phenomenon is basically avoided; in another embodiment, taking an electric proportional variable pump as an example, the pump can control the displacement by adjusting the control current, and find a curve of the known current and the pump displacement of the open type pump sample, the open type pump is driven by an engine (or a motor), and the flow of the open type system can be controlled by the engine (or the motor) revolution and the pump displacement curve, so as to achieve the purpose of accurately controlling the flow rate of the pipeline. The variable pump 3 is connected with a driving motor 2.
The pressure oil filter 4 can provide guarantee for the system is clean, and the filter core needs to be changed regularly in order to guarantee that hydraulic oil is pollution-free.
The pressure measuring device 10 is a shock-proof pressure gauge or a pressure sensor. The range of the pressure gauge is selected according to the system pressure and is used for detecting the system pressure.
The cooler 12 can provide guarantee for system heat dissipation, and the type of the radiator needs to be selected according to working parameters such as heat dissipation equivalent power, ideal oil temperature, environment temperature difference, system flow and the like.
The overflow valve group 11 protects the multi-stage hydraulic cylinders etc. by preventing the system from overpressure, while at the same time protecting the mechanical structure from excessive push-pull forces.
The multi-way valve 5 is provided with two working ports (an opening A and an opening B), the two working ports are correspondingly connected with two locking valve groups 7, the two locking valve groups 7 are correspondingly connected with two multi-stage hydraulic cylinders 8, and the pressure measuring points 9 are two groups. The two sets of pressure measuring points 9 are connected to the shuttle valve 6, and the shuttle valve 6 is connected to a pressure measuring device 10 for carrying out combined pressure measurement on the working pressures of the two multi-stage hydraulic cylinders 8.
A liquid level meter 14 is arranged in the hydraulic oil tank 1. The liquid level meter 14 detects the oil consumption and oil storage capacity of the hydraulic system, and prevents the variable displacement pump 3 from being damaged due to too low hydraulic oil level.
The hydraulic oil tank 1 is reasonably selected by the oil consumption of the system; the driving motor 2 can be selected after reasonable calculation according to the system power P (Q x delta P) and is used for providing power for the hydraulic system; the variable pump 3 is subjected to model selection after calculation by system thrust and the propelling speed of the telescopic arm, and is used for converting mechanical energy into hydraulic energy; the pressure oil filter 4 and the return oil filter 13 are selected after calculation according to the flow and pressure of the system, and the functions of the filters are basic guarantee for system cleaning; the multi-way valve 5 is used for matching the flow and the pressure of the hydraulic pump according to the flow and the pressure required by the execution element; the shuttle valve 6 is used for measuring and combining the working pressures of the two telescopic cylinders; the multi-stage hydraulic cylinder 8 is selected according to the thrust required by machinery, and is used for converting hydraulic energy into mechanical energy to achieve the purpose of use; the pressure measuring point 9 and the pressure measuring device 10 are used for measuring the pressure of an actuating element of the hydraulic system, and can be matched with an electric program to prevent the structure from being damaged due to overpressure of the system; the overflow valve group 11 is used for preventing a heavy object from being pushed in a no-load manner, preventing the structure from being damaged due to misoperation and playing a safety role; the cooler 12 cools the system to prevent the hydraulic oil from being over-stable and excessively low in viscosity to damage hydraulic components.
In the embodiment, a telescopic boom is cooperatively operated by two 40t hydraulic multi-stage oil cylinders, the two multi-stage oil cylinders do not operate simultaneously, and the working process is as follows: the working flow of the 40t multistage cylinder 1 extending → the 40t multistage cylinder 2 retracting → the 40t multistage cylinder 1 extending is one cycle.
Firstly, when a quantitative pump is selected by controlling a horizontal telescopic arm multi-stage cylinder, calculating:
the parameters of the horizontal telescopic arm loop multi-stage oil cylinder are as follows:
push-pull force 40t multistage hydraulic cylinder: 280X 235-3000/200X 125-3000;
the fastest running speed of the horizontal telescopic arm meets 1.5m/min, namely 25 mm/s;
the oil cylinder pressure calculation formula is as follows: p is F/S;
the formula for calculating the flow of the oil cylinder is as follows: q ═ S · v;
the hydraulic pump power calculation formula: n is PQ/60 eta;
wherein: p is the pressure of the oil cylinder;
f is thrust;
s is the stressed sectional area of the oil cylinder;
q is the flow rate of the oil cylinder;
n-hydraulic pump power;
v is the telescopic speed of the oil cylinder;
eta-total power of the hydraulic pump;
1) first stage extension of 40t multi-stage hydraulic cylinder
The calculated working pressure was: 6.8MPa, the flow rate is as follows: 93L/min.
2) Second stage extension of 40t multi-stage hydraulic cylinder
The calculated working pressure was: 13MPa, flow rate: 47L/min.
3)40t multistage hydraulic cylinder second stage retraction
The calculated working pressure was: 22MPa, flow rate: 29L/min.
4)40t multistage hydraulic cylinder first stage retraction
The calculated working pressure was: 23MPa, flow rate: 28L/min.
When the control pump selects the fixed displacement pump, the motor power is calculated as follows:
the maximum working pressure P of the system is 23MPa, and the required hydraulic pump provides the working pressure of 25MPa by considering the pressure loss of 2 MPa. The maximum flow of the system is 93L/min; assuming a pump efficiency of 0.9 and a pump volumetric efficiency of 0.92, the power required was calculated to be 46.7 kw.
Second, when the variable displacement pump is selected by the horizontal telescopic arm multi-stage cylinder control
1) First stage extension of 40t multi-stage hydraulic cylinder
The calculated working pressure was: 6.8MPa, the flow rate is as follows: 93L/min, and considering the pressure loss of the system to be 2MPa, the required input power of the hydraulic pump is 13.6 kw.
2) Second-stage extension of 40t multi-stage hydraulic cylinder
The calculated working pressure was: 13MPa, flow rate: and 47L/min, and considering the pressure loss of the system to be 2MPa, the required input power of the hydraulic pump is 14.1 kw.
3)40t multistage hydraulic cylinder second stage retraction
The calculated working pressure was: 22MPa, flow rate: 29L/min, and considering the pressure loss of the system to be 2MPa, the required input power of the hydraulic pump is 12.8 kw.
4)40t multistage hydraulic cylinder first stage retraction
The calculated working pressure was: 23MPa, flow rate: 28L/min, and considering the pressure loss of the system to be 2MPa, the required input power of the hydraulic pump is 13 kw.
In comparison with the embodiment, when the variable pump is selected as the hydraulic pump controlled by the horizontal telescopic arm multi-stage cylinder, the required power of the hydraulic pump is 14.1kw at most, and is reduced by 70% compared with 46.7kw, and the energy consumption is greatly reduced.
The utility model provides an energy-conserving hydraulic system of horizontal flexible arm hydraulic pump of multistage cylinder control, improve the horizontal flexible arm of traditional fixed-displacement pump control into the multistage pneumatic cylinder of the horizontal flexible arm of variable pump and system component control that matches with it, switch the control signal of the multi-channel valve when the multistage pneumatic cylinder switches operating condition and can realize the stable speed operation of horizontal flexible arm; the control to multistage pneumatic cylinder rationally chooses for use the variable pump can guarantee to a great extent that reliable stable operating condition reduces the consumption of the energy, has also satisfied the requirement of building energy-concerving and environment-protective type society simultaneously, has improved economic nature and practicality.
The principle and the implementation of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides an energy-conserving hydraulic system of flexible arm hydraulic pump of multistage cylinder control level which characterized in that includes: the hydraulic oil tank is connected with an oil suction port of the variable pump, an oil outlet of the variable pump is connected with the front end of the oil pressing filter, the tail end of the oil pressing filter is connected with an oil inlet of a multi-way valve, a working port of the multi-way valve is connected with a locking valve set, the locking valve set is connected with the multi-stage hydraulic cylinder, a pipeline between the multi-way valve and the locking valve set is provided with a pressure measuring point, and the pressure measuring point is provided with the pressure measuring device; the multi-way valve and the locking valve group are connected with an overflow valve group in a shunting manner, an oil return port of the overflow valve group and an oil return port of the multi-way valve are connected to an oil return main pipeline in parallel, the oil return main pipeline is connected with an inlet of a cooler, an outlet of the cooler is connected with an inlet of an oil return filter, and the tail end of the oil return filter is connected to the hydraulic oil tank.
2. The energy-saving hydraulic system of a multi-cylinder control horizontal telescopic boom hydraulic pump according to claim 1, characterized in that the variable pump is a load sensitive variable pump, a constant power variable pump or an electric proportional control variable pump.
3. The energy-saving hydraulic system of a hydraulic pump with a multi-stage cylinder controlling a horizontal telescopic boom of claim 1, wherein the multi-way valve is a load-sensitive multi-way valve, a switch valve or a proportional valve, and the multi-way valve is matched and selected with the variable displacement pump.
4. The energy-saving hydraulic system of a hydraulic pump with a multi-stage cylinder control horizontal telescopic boom according to claim 1, wherein the pressure measuring device is a shock-proof pressure gauge or a pressure sensor.
5. The energy saving hydraulic system of a hydraulic pump with a multi-cylinder control horizontal telescopic boom of claim 1, wherein a driving motor is connected to the variable displacement pump.
6. The energy-saving hydraulic system of a hydraulic pump with a multi-stage cylinder control horizontal telescopic boom of claim 1, wherein the multi-way valve is provided with two working ports, two locking valve sets are correspondingly connected to the two multi-stage hydraulic cylinders, and the pressure measuring points are divided into two groups.
7. The energy saving hydraulic system of a multi-stage cylinder controlled horizontal telescopic boom hydraulic pump according to claim 6, wherein two sets of pressure measuring points are connected to a shuttle valve connected to a pressure measuring device for combined pressure measurement of the working pressures of two multi-stage hydraulic cylinders.
8. The energy-saving hydraulic system of a hydraulic pump with a multi-stage cylinder controlled horizontal telescopic boom according to claim 1, characterized in that a liquid level meter is arranged in the hydraulic oil tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221132296.9U CN217354964U (en) | 2022-05-11 | 2022-05-11 | Energy-saving hydraulic system of multi-stage cylinder control horizontal telescopic arm hydraulic pump |
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| CN202221132296.9U CN217354964U (en) | 2022-05-11 | 2022-05-11 | Energy-saving hydraulic system of multi-stage cylinder control horizontal telescopic arm hydraulic pump |
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