CN212532225U - Energy-saving hydraulic system - Google Patents
Energy-saving hydraulic system Download PDFInfo
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- CN212532225U CN212532225U CN202022097616.9U CN202022097616U CN212532225U CN 212532225 U CN212532225 U CN 212532225U CN 202022097616 U CN202022097616 U CN 202022097616U CN 212532225 U CN212532225 U CN 212532225U
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Abstract
The utility model discloses an energy-conserving hydraulic system for high altitude construction car, including power unit, the execution unit, main hydraulic system, sensing unit and the control unit, power unit includes hydraulic pump and motor, the execution unit is including being used for controlling the flexible hydraulic pressure lift control system who goes up and down with the regulation work platform of cantilever crane and being used for controlling the rotatory hydraulic pressure rotation control system of revolving stage, main hydraulic system includes the stop valve, electric proportion overflow valve and the switching-over valve of connecting each hydraulic system of execution unit, sensing unit is including the long angle sensor who is used for measuring work platform's position and the weighing sensor who is used for measuring work platform loading capacity, the control unit is used for controlling power unit and main hydraulic system work. The utility model discloses a cooperation of each component can be according to high altitude construction car work needs, and control motor speed and overflow pressure value improve energy-conserving effect in order to reach consumption and the loss of hydraulic energy of controlling whole equipment energy.
Description
Technical Field
The utility model relates to the field of hydraulic techniques, especially, relate to an energy-conserving hydraulic system.
Background
The high-altitude operation vehicle is an advanced high-altitude operation machine, can improve the working efficiency, safety and comfortableness of construction personnel in the air, reduces the labor intensity, and is widely applied to the fields of engineering construction, industrial installation, equipment maintenance, factory maintenance, shipbuilding, electric power, municipal administration, airports, communication, gardens and the like. The existing aerial work platform mainly comprises a scissor-type aerial work vehicle, a straight-arm aerial work vehicle and a crank-arm aerial work vehicle, most of power of the existing aerial work platform is driven by hydraulic energy, so that the problem that how to improve the utilization efficiency of the hydraulic energy and effectively control the energy loss and the function of the existing aerial work platform needs to be solved urgently can be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an energy-conserving hydraulic system, it can reduce the loss of hydraulic energy, but the whole energy loss of effective control equipment has good energy-conserving effect simultaneously.
The utility model provides an energy-conserving hydraulic system is applied to the high altitude construction car, and this high altitude construction car includes chassis, revolving stage, cantilever crane and work platform, and its characterized in that, this energy-conserving hydraulic system includes:
the power unit is provided with a hydraulic pump and a motor, an oil suction port of the hydraulic pump is connected with an oil tank, and the motor is connected with the hydraulic pump;
the execution unit comprises a hydraulic lifting control system and a hydraulic rotation control system, the hydraulic lifting control system is connected with the arm support and used for controlling the arm support to stretch so as to adjust the lifting of the operation platform, and the hydraulic rotation control system is connected with the rotary table and used for controlling the rotary table to rotate;
the main hydraulic system is provided with a stop valve, an electric proportional overflow valve and a reversing valve which are connected in sequence, the stop valve is arranged between the hydraulic pump and the electric proportional overflow valve, the reversing valve is arranged between the electric proportional overflow valve and the execution unit, and the reversing valve is provided with more than two hydraulic systems which are respectively connected with the execution unit;
the sensing unit comprises a long-angle sensor and a weighing sensor, the long-angle sensor is arranged on the arm support and used for measuring the position of the operation platform, and the weighing sensor is arranged on the operation platform and used for measuring the load capacity of the operation platform;
and the control unit is connected with the power unit, the main hydraulic system and the sensing unit and is used for receiving the data measured by the sensing unit and calculating to control the power unit and the main hydraulic system to work.
Preferably, the hydraulic lift control system comprises:
the main arm hydraulic control system comprises a main arm oil cylinder;
the leveling hydraulic control system comprises a main leveling oil cylinder and an auxiliary leveling oil cylinder;
the auxiliary arm hydraulic control system comprises an auxiliary arm oil cylinder.
Preferably, the direction valve comprises:
the reversing valve I is arranged between the electric proportional overflow valve and the main arm oil cylinder;
the second reversing valve is arranged between the electric proportional overflow valve and the leveling hydraulic control system;
the reversing valve III is arranged between the electric proportional overflow valve and the hydraulic rotary control system;
and the reversing valve IV is arranged between the electric proportional overflow valve and the auxiliary arm oil cylinder.
Preferably, a first double balance valve is arranged between the rod cavity and the cavity-free rod of the auxiliary leveling cylinder.
Preferably, the hydraulic rotation control system includes a hydraulic motor with a brake and a shuttle valve connected in parallel with the directional valve three.
Preferably, a second double balance valve is arranged between the hydraulic motor and the third reversing valve.
Preferably, the execution unit further comprises a hydraulic floating control system, the hydraulic floating control system is connected with the hydraulic pump through a reversing valve V, and the hydraulic floating control system is used for adjusting the swing of a front axle of the chassis.
Preferably, the main hydraulic system further comprises a pressure reducing valve, and the pressure reducing valve is arranged between the hydraulic pump and the reversing valve V.
Preferably, the main hydraulic system further comprises an overflow valve, and the overflow valve is arranged between the leveling hydraulic control system and an oil return port of the oil tank.
Preferably, the main hydraulic system further comprises an adjustable throttle valve, and the adjustable throttle valve is arranged between the second reversing valve and the electric proportional overflow valve.
The utility model provides a pair of energy-conserving hydraulic system, cooperation through power pack, execution unit, main hydraulic system, sensing unit and the control unit can match corresponding overflow pressure value when carrying out different actions according to the operation demand to reduce the hydraulic pressure energy because the high overflow pressure's of system loss, simultaneously through the rotational speed of the control unit joint control motor, in order to realize reaching energy-conserving effect to the control of whole energy loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an energy-saving hydraulic system according to an embodiment of the present invention;
fig. 2 is a structural diagram of the energy-saving hydraulic system of the embodiment of the invention applied to an overhead working truck;
fig. 3 is a partial enlarged view of a in fig. 2.
The hydraulic control system comprises a power unit 1, a power unit 2, an execution unit 3, a main hydraulic system 4, an oil tank 5, a long angle sensor 6, a weighing sensor 7, a first filter 8, a second filter 11, a hydraulic pump 12, a motor 21, a hydraulic lifting control system 22, a hydraulic rotation control system 23, a hydraulic floating control system 31, a stop valve 32, an electric proportional overflow valve 33, an overflow valve 34, a throttle valve 35, a reversing valve five, a pressure reducing valve 36, a pressure reducing valve 91, a chassis 92, a rotary table 93, a boom support 94, a working platform 211, a main boom cylinder 212, a main leveling cylinder 213, a secondary leveling cylinder 214, a secondary boom cylinder 215, a first double balancing valve 221, a brake 222, a hydraulic motor 223, a shuttle valve 224, a second double balancing valve 231, a left front axle cylinder 232, a right front axle cylinder 361, a first reversing valve 362, a second angle sensor, a weighing sensor 7, a first filter, a second filter, a hydraulic motor 11, a hydraulic motor 223, and a second reversing valve 363, a third reversing valve 364, a fourth reversing valve S, an oil suction port T and an oil return port.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.
It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, and are used for convenience of description and simplification of description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 2, an energy-saving hydraulic system is applied to an aerial work platform, the aerial work platform comprises a chassis 91, a rotary table 92, an arm support 93 and a work platform 94, and the energy-saving hydraulic system comprises:
a power unit 1 having a hydraulic pump 11 and a motor 12, wherein an oil suction port S of the hydraulic pump 11 is connected to the oil tank 4, and the motor 12 is connected to the hydraulic pump 11;
the execution unit 2 comprises a hydraulic lifting control system 21 and a hydraulic rotation control system 22, the hydraulic lifting control system 21 is connected with the arm support 93 and used for controlling the arm support 93 to stretch and retract so as to adjust the lifting of the operation platform 94, and the hydraulic rotation control system 22 is connected with the rotary table 92 and used for controlling the rotary table 92 to rotate;
the main hydraulic system 3 is provided with a stop valve 31, an electric proportional overflow valve 32 and a reversing valve which are sequentially connected, wherein the stop valve 31 is arranged between the hydraulic pump 11 and the electric proportional overflow valve 32, the reversing valve is arranged between the electric proportional overflow valve 32 and the execution unit 2, and the reversing valve is provided with more than two hydraulic systems which are respectively connected with the execution unit 2;
the sensing unit comprises a long angle sensor 5 and a weighing sensor 6, the long angle sensor 5 is arranged on the arm support 93 and used for measuring the position of the operation platform 94, and the weighing sensor 6 is arranged on the operation platform 94 and used for measuring the load capacity of the operation platform 94;
and the control unit is connected with the power unit 1, the main hydraulic system 3 and the sensing unit and is used for receiving data measured by the sensing unit and calculating to control the power unit 1 and the main hydraulic system 3 to work.
The power unit 1 sucks pressure oil from the oil tank 4 mainly through the hydraulic pump 11 and supplies the pressure oil to the main hydraulic system 3, the motor 12 is used for driving the hydraulic pump 11 to work, and the hydraulic pump 11 can be a duplex hydraulic pump in order to control the work and the steering of the aerial work platform.
The execution unit 2 is used for controlling the rotation of the turntable 92 of the aerial work platform and controlling the arm support 93 to ascend and contract so as to adjust the height and the work amplitude of the work platform 94.
The main hydraulic system 3 is arranged between the power unit 1 and the execution unit 2, and two stop valves 31 can be arranged and are respectively connected with two pumps of the hydraulic pump 11; the electric proportional overflow valve 32 is connected between the stop valve 31 and the execution unit 2, and different voltages can be input to the electromagnet of the electric proportional overflow valve 32, so that the generated thrust is changed, and different hydraulic pressures are obtained; the two or more reversing valves are connected between the electric proportional overflow valve 32 and each hydraulic system of the execution unit 2, and are used for connecting the hydraulic pump 11 with oil passages of each hydraulic system to realize communication, cutting off or reversing of hydraulic oil.
Specifically, the hydraulic lift control system 21 may include:
the main arm hydraulic control system comprises a main arm oil cylinder 211 for driving a main arm on the arm support 93 to ascend and contract;
a leveling hydraulic control system including a main leveling cylinder 212 and a sub leveling cylinder 213 for leveling the work platform 94;
and the auxiliary arm hydraulic control system comprises an auxiliary arm oil cylinder 214 for driving the auxiliary arm on the arm support 93 to work.
The direction valve may include:
the first reversing valve 361 is arranged between the electric proportional overflow valve 32 and the main arm oil cylinder 211;
the second reversing valve 362 is arranged between the electric proportional overflow valve 32 and the leveling hydraulic control system;
a third reversing valve 363 which is arranged between the electric proportional overflow valve 32 and the hydraulic rotation control system 22;
and a fourth reversing valve 364 which is arranged between the electric proportional relief valve 32 and the auxiliary arm oil cylinder 214.
The first switching valve 361 and the fourth switching valve 364 can be three-position four-way electro-hydraulic valves, and the second switching valve 362 and the third switching valve 363 can be three-position four-way electromagnetic valves.
The hydraulic rotation control system 22 may include a hydraulic motor 222 with a brake 221 and a shuttle valve 223, the shuttle valve 223 is connected in parallel with the direction change valve 363, and a throttle valve may be disposed between the shuttle valve 223 and the brake 221 to control the flow rate of hydraulic oil on the hydraulic rotation control system 22.
Wherein the long angle sensor 5 in the sensing unit is used for measuring the specific position size of the work platform 94, and the weighing sensor 6 is used for measuring the load capacity on the work platform 94 and sensing the measured data to the control unit.
The control unit is used for receiving the data transmitted by the sensing unit, and transmitting the matched characteristic curve to the controller of the motor 12 and the electric proportional relief valve 32 of the main hydraulic system after program operation.
The working principle of the embodiment is as follows:
when the aerial work platform needs to perform steering operation, assuming that the steering pressure is set to 10MPa, the flow required by the system is small at this time, the control unit transmits a motor characteristic curve with low power and high energy efficiency to the controller of the motor 12 and acts on the motor 12, and simultaneously the control unit transmits a command of 10MPa to the electric proportional relief valve 32, controls one of the hydraulic pumps 11 to be opened through the control unit, and controls the other hydraulic pump 11 to be not acted, at this time, the oil passages of the hydraulic rotation control system 22 in the execution unit 2 are communicated, and the rotary table 92 can be driven to rotate.
When the aerial work platform needs to lift, the control unit transmits a motor characteristic curve with high power and high torque to a controller of the motor 12 through the control unit and acts on the motor 12 after program operation according to data transmitted by the long angle sensor 5 and the weighing sensor 6 in the sensing unit, meanwhile, the control unit transmits pressure to the electric proportional overflow valve 32 (the pressure value can be set to 14Mpa in no-load and 16Mpa in full-load), controls two pumps of the hydraulic pump 11 to be opened through the control unit, at this time, oil passages of the hydraulic lifting control system 21 in the execution unit 2 are communicated, and the arm support 93 can be driven to stretch out and draw back to adjust the lifting of the work platform 94.
It can be seen that, the utility model provides a pair of energy-conserving hydraulic system, through power unit, execution unit, main hydraulic system, sensing unit and the control unit's cooperation, can match corresponding overflow pressure value when carrying out different actions according to the operation demand of difference to reduce hydraulic energy because the loss of the high overflow pressure of system, simultaneously through the rotational speed of the control unit joint control motor, in order to realize reaching energy-conserving effect to the control of whole energy loss.
Further, to facilitate adjustment of the work platform 94 to remain level, a double balancing valve one 215 may be provided between the rod chamber and the chamber-less rod of the secondary leveling cylinder 213.
Further, to facilitate regulating the rotation of the turret 92, a second double balanced valve 224 may be provided between the hydraulic motor 222 and the reversing valve four 364.
In a preferred embodiment, to improve the balance during the traveling of the aerial work platform, the implement unit 2 may further include a hydraulic float control system 23, the hydraulic float control system 23 is connected to the hydraulic pump 11 through a fifth reversing valve 35, and the hydraulic float control system 23 is used for adjusting the swing of a front axle of the chassis 91.
The hydraulic floating control system 23 may include a front axle left oil cylinder 231 and a front axle right oil cylinder 232, the front axle left oil cylinder 231 and the front axle right oil cylinder 232 are both connected with a balance valve, and pressure oil is provided to the left and right oil cylinders of the front axle through the balance valve.
Wherein, the fifth reversing valve 35 can be a two-position three-way electromagnetic valve.
In order to regulate the pressure of the hydraulic floating control system 23, the main hydraulic system 3 may further include a pressure reducing valve 36, and the pressure reducing valve 36 is disposed between the hydraulic pump 11 and the fifth reversing valve 35.
Further, the main hydraulic system 3 may further include a relief valve 33, and the relief valve 33 is disposed between the leveling hydraulic control system and the oil return port T of the oil tank 4.
Further, the main hydraulic system 3 further includes an adjustable throttle valve 34, and the adjustable throttle valve 34 is disposed between the third direction change valve 363 and the electric proportional pressure relief valve 32.
Further, in order to improve the cleanliness of the pressure oil and ensure the normal operation of the main hydraulic system 3, a first filter 7 may be disposed on a pipeline connecting the shutoff valve 31 and the electric proportional relief valve 32.
Similarly, a second filter 8 may be disposed on the return lines of the hydraulic lift control system 21 and the hydraulic rotation control system 22 and the oil tank 4.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. It should be noted that there are infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that various improvements, decorations or changes can be made without departing from the principles of the present invention, and the technical features can be combined in a suitable manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.
Claims (10)
1. An energy-saving hydraulic system applied to an aerial work vehicle, the aerial work vehicle comprises a chassis (91), a rotary table (92), an arm support (93) and a work platform (94), and is characterized by comprising:
a power unit (1) having a hydraulic pump (11) and a motor (12), wherein an oil suction port (S) of the hydraulic pump (11) is connected with an oil tank (4), and the motor (12) is connected with the hydraulic pump (11);
the execution unit (2) comprises a hydraulic lifting control system (21) and a hydraulic rotation control system (22), wherein the hydraulic lifting control system (21) is connected with the arm support (93) and used for controlling the arm support (93) to stretch and retract so as to adjust the lifting of the operation platform (94), and the hydraulic rotation control system (22) is connected with the rotary table (92) and used for controlling the rotary table (92) to rotate;
the main hydraulic system (3) is provided with a stop valve (31), an electric proportional overflow valve (32) and a reversing valve which are sequentially connected, wherein the stop valve (31) is arranged between the hydraulic pump (11) and the electric proportional overflow valve (32), the reversing valve is arranged between the electric proportional overflow valve (32) and the execution unit (2), and the reversing valve is provided with more than two hydraulic systems which are respectively connected with the execution unit (2);
the sensing unit comprises a long angle sensor (5) and a weighing sensor (6), the long angle sensor (5) is arranged on the arm support (93) and used for measuring the position of the operation platform (94), and the weighing sensor (6) is arranged on the operation platform (94) and used for measuring the load capacity of the operation platform (94);
and the control unit is connected with the power unit (1), the main hydraulic system (3) and the sensing unit, and is used for receiving the data measured by the sensing unit to calculate so as to control the power unit (1) and the main hydraulic system (3) to work.
2. The economized hydraulic system according to claim 1, characterized in that said hydraulic lift control system (21) comprises:
a main arm hydraulic control system including a main arm cylinder (211);
a leveling hydraulic control system including a primary leveling cylinder (212) and a secondary leveling cylinder (213);
an auxiliary arm hydraulic control system includes an auxiliary arm cylinder (214).
3. The economized hydraulic system of claim 2, wherein the reversing valve comprises:
the first reversing valve (361) is arranged between the electric proportional overflow valve (32) and the main arm oil cylinder (211);
the second reversing valve (362) is arranged between the electric proportional overflow valve (32) and the leveling hydraulic control system;
a third reversing valve (363) arranged between the electric proportional overflow valve (32) and the hydraulic rotation control system (22);
and the reversing valve IV (364) is arranged between the electric proportional overflow valve (32) and the auxiliary arm oil cylinder (214).
4. The economized hydraulic system of claim 2, characterized in that a double balancing valve one (215) is disposed between the rod chamber and the chamber-less rod of the secondary leveling cylinder (213).
5. The economized hydraulic system of claim 3, wherein the hydraulic rotation control system (22) includes a hydraulic motor (222) with a brake (221) and a shuttle valve (223), the shuttle valve (223) being connected in parallel with the reversing valve three (363).
6. The economized hydraulic system of claim 5, characterized in that a double balanced valve two (224) is provided between the hydraulic motor (222) and the reversing valve three (363).
7. The energy-saving hydraulic system according to claim 1, characterized in that the implement unit (2) further comprises a hydraulic float control system (23), the hydraulic float control system (23) is connected with the hydraulic pump (11) through a reversing valve five (35), and the hydraulic float control system (23) is used for adjusting the swing of a front axle of a chassis (91).
8. The economized hydraulic system according to claim 7, characterized in that the main hydraulic system (3) further comprises a pressure reducing valve (36), the pressure reducing valve (36) being provided between the hydraulic pump (11) and the direction valve five (35).
9. The energy-saving hydraulic system according to claim 2, characterized in that the main hydraulic system (3) further comprises an overflow valve (33), the overflow valve (33) being provided between the leveling hydraulic control system and an oil return (T) of the oil tank (4).
10. The economized hydraulic system according to claim 3, characterized in that the main hydraulic system (3) further comprises an adjustable throttle valve (34), the adjustable throttle valve (34) being provided between the second reversing valve (362) and the electric proportional relief valve (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022097616.9U CN212532225U (en) | 2020-09-22 | 2020-09-22 | Energy-saving hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022097616.9U CN212532225U (en) | 2020-09-22 | 2020-09-22 | Energy-saving hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212532225U true CN212532225U (en) | 2021-02-12 |
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ID=74527110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022097616.9U Expired - Fee Related CN212532225U (en) | 2020-09-22 | 2020-09-22 | Energy-saving hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN212532225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116892545A (en) * | 2023-09-11 | 2023-10-17 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
-
2020
- 2020-09-22 CN CN202022097616.9U patent/CN212532225U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116892545A (en) * | 2023-09-11 | 2023-10-17 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
| CN116892545B (en) * | 2023-09-11 | 2024-05-31 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210212 Termination date: 20210922 |