CN114215799B - Load-sensitive constant-power hydraulic system for vertical pressing station - Google Patents
Load-sensitive constant-power hydraulic system for vertical pressing station Download PDFInfo
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- CN114215799B CN114215799B CN202210155584.4A CN202210155584A CN114215799B CN 114215799 B CN114215799 B CN 114215799B CN 202210155584 A CN202210155584 A CN 202210155584A CN 114215799 B CN114215799 B CN 114215799B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
Abstract
The load-sensitive constant-power hydraulic system for the vertical compression station comprises a load-sensitive pump, wherein the load-sensitive pump is connected with a load-sensitive valve, a proportional valve is arranged in the load-sensitive valve, an oil outlet end of the proportional valve is connected with the load-sensitive pump through an LS pipeline, the load-sensitive valve is connected with a pressure head oil cylinder through a pressure stabilizing valve, a pressure sensor is further arranged at an oil outlet end of the proportional valve, and the proportional valve and the pressure sensor are connected with a controller. The load-sensitive constant-power hydraulic system for the vertical pressing station realizes the matching of pressure, flow and load through the volume speed regulation with low heat production, realizes closed-loop control through the sensor, operates at constant power, prevents the motor from being overloaded, and can realize stable and uniform action of a pressing head through the pressure stabilizing valve, thereby being safe and reliable.
Description
Technical Field
The invention relates to the technical field of centralized garbage treatment, in particular to a load-sensitive constant-power hydraulic system for a vertical pressing station.
Background
Along with the improvement of the centralized treatment degree of the urban garbage, the garbage treatment capacity is larger and larger, and the treatment capacity and environmental protection requirements of the transfer station are gradually improved. The most abundant products on the market today are the horizontal compression type. The horizontal compression box body has a butt joint port, and the industry problems of leakage, leakage and the like are commonly caused; the horizontal straight-press type transfer station has larger rebound in the compression process, which affects the operation efficiency, and meanwhile, garbage is generally mixed; the horizontal compression technology cannot realize garbage classification transfer, and the vertical compression technology is urgently to be popularized.
The vertical compression technology industry is integrally imported, a pressure head control technology developed independently does not exist, and the localization of the core technology is very important for mastering the core technology of pressure head compression.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provide a load-sensitive constant-power hydraulic system for a vertical compression station, which has good stability, safety and reliability.
The invention is realized by the following technical scheme: the load-sensitive constant-power hydraulic system for the vertical pressure station comprises a load-sensitive pump, wherein the load-sensitive pump is connected with a load-sensitive valve, a proportional valve is arranged in the load-sensitive valve, an oil outlet end of the proportional valve is connected with the load-sensitive pump through an LS (least square) pipeline, the load-sensitive valve is connected with a pressure head oil cylinder through a pressure stabilizing valve, a pressure sensor is further arranged at the oil outlet end of the proportional valve, and the proportional valve and the pressure sensor are connected with a controller.
It further comprises the following steps: the load sensitive valve comprises a proportional valve, an electric control reversing valve, a hydraulic control reversing valve and an adjustable overflow valve.
The electric control reversing valve is a three-position four-way electromagnetic reversing valve, and the hydraulic control reversing valve is a three-position four-way pilot reversing valve.
And two ends of the adjustable overflow valve are respectively connected with the oil outlet end of the load sensitive pump and the oil inlet end of the hydraulic oil tank.
And a back pressure valve is arranged between the load sensitive valve and the hydraulic oil tank.
The invention has the following advantages: the load-sensitive constant-power hydraulic system for the vertical pressure station realizes the matching of pressure, flow and load through the volume speed regulation with low heat production, realizes closed-loop control through a sensor, operates at constant power, prevents a motor from overloading, and can realize stable and uniform action of a pressure head through the pressure stabilizing valve, thereby being safe and reliable.
Drawings
Fig. 1 is a hydraulic schematic of the present invention.
In the figure: 1. the hydraulic control system comprises a load sensitive pump, 2, a load sensitive valve, 2.1, a proportional valve, 2.2, an adjustable overflow valve, 2.3, an electric control reversing valve, 2.4, a hydraulic control reversing valve, 3, a pressure sensor, 4, a pressure stabilizing valve, 5, a pressure head oil cylinder, 6, a back pressure valve, 7 and a hydraulic oil tank.
Detailed Description
The load-sensitive constant-power hydraulic system for the vertical pressure station comprises a load-sensitive pump 1, wherein the load-sensitive pump 1 is connected with a load-sensitive valve 2, a proportional valve 2.1 is arranged in the load-sensitive valve 2, an oil outlet end of the proportional valve 2.1 is connected with the load-sensitive pump 1 through an LS pipeline, the load-sensitive valve 2 is connected with a pressure head oil cylinder 5 through a pressure stabilizing valve 4, a pressure sensor 3 is further arranged at an oil outlet end of the proportional valve 2.1, and the proportional valve 2.1 and the pressure sensor 3 are connected with a controller. And a back pressure valve 6 is arranged between the load sensitive valve 2 and the hydraulic oil tank 7. The load-sensitive constant-power hydraulic system for the vertical pressure station is provided with a load-sensitive pump and a load-sensitive valve, wherein the load-sensitive valve is connected with the load-sensitive pump through an LS (least square) joint, a proportional valve is arranged in the load-sensitive valve, the LS joint is arranged behind the proportional valve, the load-sensitive pump outputs hydraulic oil under the driving of a motor, the hydraulic oil enters the load-sensitive valve and then generates pressure difference behind the valve of the proportional valve, the pressure behind the valve of the proportional valve is fed back to the load-sensitive pump through an LS oil way, and the load-sensitive pump controls the discharge capacity of the pump according to the fed-back pressure value, so that the pressure difference behind the front valve of the proportional valve is kept constant, and the speed of an oil cylinder can be linearly adjusted through an electric proportion; the pressure sensor behind the proportional valve feeds the actual pressure of the oil cylinder back to the load-sensitive pump, constant power control is completed through an electric control program, the corresponding relation between pressure speed and pressure is realized, and the motor is protected to prevent overload; the load sensitive valve is connected with the pressure head oil cylinder, when the hydraulic oil pressure stabilizing device is used, the load sensitive pump outputs hydraulic oil to the pressure head oil cylinder through the load sensitive valve and the pressure stabilizing valve under the driving of the motor, and finally the hydraulic oil returns to the hydraulic oil tank; meanwhile, a back pressure valve is added to ensure that the oil cylinder does not stall when descending, and all hydraulic oil finally returns to the hydraulic oil tank to complete a closed loop of a hydraulic system.
In order to adapt to the specific working condition of the vertical compression station, the idle stroke in the non-compression area accelerates the action of the oil cylinder, the speed is reduced when the oil cylinder contacts with a compressed object so as to improve the compression effect, a pressure sensor is arranged in front of a reversing valve, the pressure at an execution end is fed back to a control system, the control system adjusts the current of a proportional valve according to the oil pressure, the coordination of the speed and the pressure is realized, the hydraulic pump is generally ensured to be in a constant power state, and the reduction of the service life of a motor caused by overload is avoided.
As shown in fig. 1, the load-sensitive constant-power hydraulic system for the vertical pressure station includes a proportional valve 2.1, an electrically controlled directional valve 2.3, a hydraulically controlled directional valve 2.4, and an adjustable overflow valve 2.2. The electric control reversing valve 2.3 is a three-position four-way electromagnetic reversing valve, and the hydraulic control reversing valve 2.4 is a three-position four-way pilot reversing valve. And two ends of the adjustable overflow valve 2.2 are respectively connected with the oil outlet end of the load sensitive pump 1 and the oil inlet end of the hydraulic oil tank 7. According to the technical scheme, the hydraulic pressure head oil cylinder is provided with the electric control reversing valve and the hydraulic control reversing valve, the requirement on the valve power is high due to the fact that the system flow is large, the oil cylinder is reversed, the pilot reversing valve is controlled through the pilot oil way of the electromagnetic reversing valve, the extension and retraction of the pressure head oil cylinder are achieved, and the arranged variable overflow valve can limit and protect the high-pressure oil pressure.
The load-sensitive constant-power hydraulic system for the vertical pressure station has the functions of variable load sensitivity and volume speed regulation, and the pressure and the flow of the system are always matched with the load; closed-loop control is realized through a sensor, the working speed can be adjusted according to the compression compactness of the garbage, constant-power control is basically realized, and the motor is prevented from being overloaded; the balance valve and the backpressure valve ensure stable action of the pressure head, and are safe and reliable.
Claims (3)
1. The utility model provides a vertical pressure station is with sensitive constant power hydraulic system of load which characterized in that: the load-sensitive pump comprises a load-sensitive pump (1), wherein the load-sensitive pump (1) is connected with a load-sensitive valve (2), a proportional valve (2.1) is arranged in the load-sensitive valve (2), the oil outlet end of the proportional valve (2.1) is connected with the load-sensitive pump (1) through an LS pipeline, the load-sensitive valve (2) is connected with a pressure head oil cylinder (5) through a pressure stabilizing valve (4), the oil outlet end of the proportional valve (2.1) is also provided with a pressure sensor (3), and the proportional valve (2.1) and the pressure sensor (3) are connected with a controller;
the load sensitive valve (2) comprises a proportional valve (2.1), an electric control reversing valve (2.3), a hydraulic control reversing valve (2.4) and an adjustable overflow valve (2.2);
the electric control reversing valve (2.3) is a three-position four-way electromagnetic reversing valve, and the hydraulic control reversing valve (2.4) is a three-position four-way pilot reversing valve.
2. The load-sensitive constant-power hydraulic system for the vertical pressure station as claimed in claim 1, wherein: and two ends of the adjustable overflow valve (2.2) are respectively connected with the oil outlet end of the load sensitive pump (1) and the oil inlet end of the hydraulic oil tank (7).
3. The load-sensitive constant-power hydraulic system for the vertical pressure station as claimed in claim 1, wherein: a back pressure valve (6) is arranged between the load sensitive valve (2) and the hydraulic oil tank (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210155584.4A CN114215799B (en) | 2022-02-21 | 2022-02-21 | Load-sensitive constant-power hydraulic system for vertical pressing station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210155584.4A CN114215799B (en) | 2022-02-21 | 2022-02-21 | Load-sensitive constant-power hydraulic system for vertical pressing station |
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| Publication Number | Publication Date |
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| CN114215799A CN114215799A (en) | 2022-03-22 |
| CN114215799B true CN114215799B (en) | 2022-05-10 |
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| CN202210155584.4A Active CN114215799B (en) | 2022-02-21 | 2022-02-21 | Load-sensitive constant-power hydraulic system for vertical pressing station |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986071A (en) * | 1989-06-05 | 1991-01-22 | Komatsu Dresser Company | Fast response load sense control system |
| CN101858368B (en) * | 2010-05-13 | 2013-06-05 | 山东泰丰液压股份有限公司 | Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation |
| CN102434507B (en) * | 2011-11-11 | 2014-07-09 | 中联重科股份有限公司 | Engine machinery and load sensitivity control system and control method thereof |
| CN102734276B (en) * | 2012-06-28 | 2015-07-01 | 三一汽车起重机械有限公司 | Load sensing electric proportion hydraulic control system and engineering machinery |
| CN103032020B (en) * | 2012-12-19 | 2014-11-19 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hydraulic feeding system of full-automatic top drive drilling machine |
| CN103437752B (en) * | 2013-09-12 | 2015-10-21 | 中煤科工集团西安研究院有限公司 | A kind of for the long-range hydraulic control system of coal mine gallery drilling rig |
| CN104314927A (en) * | 2014-10-14 | 2015-01-28 | 浙江三一装备有限公司 | Load-sensitive hydraulic control system and method and engineering machine |
| CN207762060U (en) * | 2017-12-26 | 2018-08-24 | 长沙天盾重工有限责任公司 | A kind of overhead working truck system |
| CN111577697B (en) * | 2020-05-31 | 2022-04-01 | 北京三一智造科技有限公司 | Control method for controlling load sensitive system |
| CN112096671A (en) * | 2020-09-30 | 2020-12-18 | 潍柴动力股份有限公司 | Variable pump and hydraulic system |
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