CN214118612U - Hydraulic system for enabling oil cylinder to stably move and reducing hydraulic impact of system - Google Patents
Hydraulic system for enabling oil cylinder to stably move and reducing hydraulic impact of system Download PDFInfo
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- CN214118612U CN214118612U CN202023328870.1U CN202023328870U CN214118612U CN 214118612 U CN214118612 U CN 214118612U CN 202023328870 U CN202023328870 U CN 202023328870U CN 214118612 U CN214118612 U CN 214118612U
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Abstract
A hydraulic system for enabling an oil cylinder to stably move and reducing hydraulic impact of the system comprises a swash plate type axial plunger pump, a motor, an electromagnetic overflow valve, an electro-hydraulic reversing valve, a first oil cylinder and a second oil cylinder; the first oil cylinder and the second oil cylinder are plunger cylinders which are arranged oppositely, and plungers of the first oil cylinder and the second oil cylinder are in rigid connection, so that the plungers of the first oil cylinder and the second oil cylinder can move synchronously; the swash plate type axial plunger pump is connected with the motor by a bell jar coupling; the outlet of the swash plate type axial plunger pump is respectively connected with the inlet of the electromagnetic overflow valve and the inlet of the electro-hydraulic directional valve through pipelines, the first outlet of the electro-hydraulic directional valve is connected with the first oil cylinder through a pipeline, and the second outlet of the electro-hydraulic directional valve is connected with the second oil cylinder through a pipeline; the oil return port of the electro-hydraulic reversing valve, the outlet of the electromagnetic overflow valve, the inlet of the swash plate type axial plunger pump and the oil drain port of the swash plate type axial plunger pump are respectively connected with an oil tank through pipelines.
Description
Technical Field
The utility model relates to an environmental protection equipment, especially a make hydro-cylinder motion steadily reduce hydraulic system that system hydraulic pressure strikes.
Background
With the development of industry, the environmental protection pressure is getting higher and higher, and the treatment mode of the sludge as industrial solid waste is also in urgent need of improvement. As a hydraulic system for controlling the normal work of the hydraulic system, the oil supply scheme of a gear pump (or a constant pressure plunger pump), an energy accumulator and an unloading overflow valve is mainly adopted in the industry at present. The working mode adopts a gear pump (or a constant pressure plunger pump) and an energy accumulator as power sources together, the equipment works intermittently, the energy accumulator is filled with oil at ordinary times, and the gear pump (or the constant pressure plunger pump) is unloaded through an unloading overflow valve. When the oil cylinder acts, the energy accumulator and the gear pump (or the constant pressure plunger pump) supply oil to the oil cylinder together. Because the accumulator discharges oil rapidly when the oil cylinder acts, the oil cylinder belongs to active oil supply, the flow is uncontrollable, the hydraulic impact is great, the noise is great, the environment is influenced, and the service life of a hydraulic element and the reliability of a system are seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a make hydro-cylinder motion steadily reduce hydraulic system that system hydraulic shock, its hydraulic shock is little, and the noise is little, has improved hydraulic component's life and systematic reliability greatly.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a hydraulic system for enabling an oil cylinder to stably move and reducing hydraulic impact of the system comprises a swash plate type axial plunger pump, a motor, an electromagnetic overflow valve, an electro-hydraulic reversing valve, a first oil cylinder and a second oil cylinder; the first oil cylinder and the second oil cylinder are plunger cylinders which are arranged oppositely, and plungers of the first oil cylinder and the second oil cylinder are in rigid connection, so that the plungers of the first oil cylinder and the second oil cylinder can move synchronously;
the swash plate type axial plunger pump is connected with the motor by a bell jar coupling;
the outlet of the swash plate type axial plunger pump is respectively connected with the inlet of the electromagnetic overflow valve and the inlet of the electro-hydraulic directional valve through pipelines, the first outlet of the electro-hydraulic directional valve is connected with the first oil cylinder through a pipeline, and the second outlet of the electro-hydraulic directional valve is connected with the second oil cylinder through a pipeline; the oil return port of the electro-hydraulic reversing valve, the outlet of the electromagnetic overflow valve, the inlet of the swash plate type axial plunger pump and the oil drain port of the swash plate type axial plunger pump are respectively connected with an oil tank through pipelines.
Further, the swash plate type axial plunger pump is a load sensitive swash plate type axial plunger pump.
Further, the swash plate type axial plunger pump comprises a swash plate, a plunger, a cylinder body, a valve plate and a transmission shaft; an inclined angle is formed between the cylinder body and the swash plate; the plungers are uniformly distributed in the cylinder body, and the heads of the plungers are tightly pressed on the swash plate under the action of a spring return mechanism and oil pressure; the transmission shaft drives the cylinder body to rotate through a spline, and the swash plate and the port plate are fixed.
Furthermore, the hydraulic system for enabling the oil cylinder to stably move and reducing hydraulic impact of the system further comprises a PLC control system.
Furthermore, the first oil cylinder and the second oil cylinder are both provided with travel switches and connected with the PLC control system; the electromagnetic overflow valve and the electro-hydraulic reversing valve are both connected to the PLC control system.
Furthermore, the inner diameter range of the first oil cylinder and the second oil cylinder is phi 50 mm-phi 120mm, and the stroke range is 100mm-300 mm.
Further, the power range of the motor is 11KW-250KW, and the installation form is B35, four poles, 380V and 50 Hz.
Furthermore, the displacement range of the swash plate type axial plunger pump is 45ml/r-140ml/r, the rotating direction is clockwise rotation, and the working pressure range is 0-21 MPa.
Furthermore, the working flow range of the electromagnetic overflow valve is 0-250L/min, and the working pressure range is 0-21 MPa.
Furthermore, the working flow range of the electro-hydraulic reversing valve is 0-250L/min, and the working pressure range is 0-21 MPa.
The utility model has the advantages that: the utility model discloses make the hydro-cylinder motion steadily reduce the hydraulic system that system hydraulic pressure strikeed, its hydraulic pressure strikes for a short time, and the noise is little, has improved hydraulic component's life and systematic reliability greatly.
Drawings
Fig. 1 is the structure schematic diagram of the hydraulic system for making the oil cylinder move stably and reducing the hydraulic impact of the system.
Detailed Description
In order to make the technical solution and the advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, the utility model provides a make hydro-cylinder motion steadily reduce hydraulic system that system hydraulic pressure strikeed, including swash plate axial plunger pump 1, motor 2, electromagnetic overflow valve 3, electric liquid switching-over valve 4, first hydro-cylinder 5 and second hydro-cylinder 6. The first oil cylinder 5 and the second oil cylinder 6 are plunger cylinders which are arranged oppositely, and plungers 51 and 61 of the first oil cylinder 5 and the second oil cylinder 6 are rigidly connected, so that the plungers 51 and 61 of the first oil cylinder 5 and the second oil cylinder 6 can move synchronously, and when the plunger of one oil cylinder extends, the plunger of the other oil cylinder retracts; and vice versa.
The swash plate type axial plunger pump 1 is connected with the motor 2 by adopting a bell coupling, and the outlet of the swash plate type axial plunger pump 1 is respectively connected with the inlet of the electromagnetic overflow valve 3 and the inlet of the electro-hydraulic reversing valve 4 through pipelines. The first outlet 41 of the electro-hydraulic directional valve 4 is connected with the first oil cylinder 5 through a pipeline, and the second outlet 42 of the electro-hydraulic directional valve 4 is connected with the second oil cylinder 6 through a pipeline. The oil return port 43 of the electro-hydraulic directional valve 4, the outlet of the electromagnetic overflow valve 3, the inlet of the swash plate type axial plunger pump 1 and the oil drainage port of the swash plate type axial plunger pump 1 are respectively connected with the oil tank 7 through pipelines.
Particularly, the utility model discloses a sensitive system of load is connected to swash plate axial plunger pump 1, for the sensitive swash plate axial plunger pump of load. The swash plate type axial plunger pump 1 includes a swash plate, a plunger, a cylinder block, a port plate, and a transmission shaft. An inclination angle gamma is formed between the cylinder block and the swash plate. The plungers are uniformly distributed in the cylinder body, and the heads of the plungers are tightly pressed on the swash plate under the action of a spring return mechanism and oil pressure. The transmission shaft drives the cylinder body to rotate through a spline, and the swash plate and the port plate are fixed. When the transmission shaft can rotate in the anticlockwise direction (seen from left to right), the plunger not only rotates along with the cylinder body, but also makes reciprocating linear motion in the plunger hole of the cylinder body. When the transmission shaft and the cylinder body rotate once, each plunger finishes sucking and pressing oil once; as the cylinder rotates continuously, the plunger continuously draws oil and presses oil. If the size of the inclination angle gamma of the swash plate is changed, the reciprocating stroke of the plunger can be changed, namely the displacement of the pump can be changed, and the variable swash plate type axial plunger pump is formed; if the direction of the inclined angle of the inclined plate is changed, the direction of sucking and pressing oil can be changed, and the bidirectional variable inclined plate type axial plunger pump can be formed.
The utility model discloses make the hydro-cylinder motion steadily reduce the hydraulic system that system hydraulic pressure strikeed, still include PLC control system, realize automatic control. The first oil cylinder and the second oil cylinder are both provided with travel switches and are connected with the PLC control system. The electromagnetic overflow valve and the electro-hydraulic reversing valve are both connected to the PLC control system. When one of the oil cylinders needs to act, the PLC control system controls the electromagnet of the electromagnetic overflow valve and the No. 1 electromagnet of the electro-hydraulic reversing valve to be electrified so as to control the oil cylinder to reverse. When the oil cylinder moves in place, the travel switch is triggered to be powered on, and the system automatically carries out subsequent actions according to a program. When the other oil cylinder needs to act, the PLC control system controls the electromagnet of the electromagnetic overflow valve and the No. 2 electromagnet of the electro-hydraulic reversing valve to be electrified so as to control the oil cylinder to reverse. When the oil cylinder moves in place, the travel switch is also triggered to be powered on, and the system automatically carries out subsequent actions according to the program. When the two oil cylinders do not need to act, the electromagnet of the electromagnetic overflow valve and the two electromagnets of the electro-hydraulic reversing valve are both de-energized; at the moment, the load-sensitive swash plate type axial plunger pump is unloaded through the electromagnetic overflow valve, and the oil cylinder is in a pressure maintaining state (the middle position of the electro-hydraulic reversing valve can be in an O shape, so that short-term pressure maintaining can be realized).
Furthermore, the inner diameter range of the first oil cylinder 5 and the second oil cylinder 6 is phi 50 mm-phi 120mm, and the stroke range is 100mm-300 mm. The power range of the motor 2 is 11KW-250KW, the installation form is B35, four poles, 380V and 50Hz, and the motor belongs to a three-phase asynchronous alternating current motor according to type division. The displacement range of the swash plate type axial plunger pump 1 is 45ml/r-140ml/r, the rotating direction is clockwise rotation, and the working pressure range is 0-21 MPa. The working flow range of the electromagnetic overflow valve 3 is 0-250L/min, and the working pressure range is 0-21 MPa. The working flow range of the electro-hydraulic reversing valve 4 is 0-250L/min, and the working pressure range is 0-21 MPa.
The electromagnetic overflow valve controls loading and unloading, when the oil cylinder acts, the electromagnetic overflow valve loads, and the swash plate type axial plunger pump sensitive to load supplies oil to the oil cylinder; when the oil cylinder does not act, the electromagnetic overflow valve is unloaded, the load-sensitive inclined disc type axial plunger pump is unloaded through the electromagnetic overflow valve, and oil flows back to the oil tank. The reversing of the oil cylinder is controlled by an electro-hydraulic reversing valve. The swash plate type axial plunger pump sensitive to load is in an unloading state at ordinary times, belongs to passive oil supply, and has small hydraulic impact, so that the hydraulic impact caused by oil discharge of an energy accumulator when an oil cylinder acts in the prior art is avoided.
Since many changes may be made in the above-described embodiments without departing from the scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (10)
1. A hydraulic system for enabling an oil cylinder to stably move and reducing hydraulic impact of the system is characterized by comprising a swash plate type axial plunger pump, a motor, an electromagnetic overflow valve, an electro-hydraulic reversing valve, a first oil cylinder and a second oil cylinder; the first oil cylinder and the second oil cylinder are plunger cylinders which are arranged oppositely, and plungers of the first oil cylinder and the second oil cylinder are in rigid connection, so that the plungers of the first oil cylinder and the second oil cylinder can move synchronously;
the swash plate type axial plunger pump is connected with the motor by a bell jar coupling;
the outlet of the swash plate type axial plunger pump is respectively connected with the inlet of the electromagnetic overflow valve and the inlet of the electro-hydraulic directional valve through pipelines, the first outlet of the electro-hydraulic directional valve is connected with the first oil cylinder through a pipeline, and the second outlet of the electro-hydraulic directional valve is connected with the second oil cylinder through a pipeline; the oil return port of the electro-hydraulic reversing valve, the outlet of the electromagnetic overflow valve, the inlet of the swash plate type axial plunger pump and the oil drain port of the swash plate type axial plunger pump are respectively connected with an oil tank through pipelines.
2. The hydraulic system for stabilizing the movement of the oil cylinder and reducing the hydraulic impact of the system as claimed in claim 1, wherein: the swash plate type axial plunger pump is a load sensitive swash plate type axial plunger pump.
3. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the swash plate type axial plunger pump comprises a swash plate, a plunger, a cylinder body, a valve plate and a transmission shaft; an inclined angle is formed between the cylinder body and the swash plate; the plungers are uniformly distributed in the cylinder body, and the heads of the plungers are tightly pressed on the swash plate under the action of a spring return mechanism and oil pressure; the transmission shaft drives the cylinder body to rotate through a spline, and the swash plate and the port plate are fixed.
4. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the system also comprises a PLC control system.
5. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock of claim 4, wherein: the first oil cylinder and the second oil cylinder are provided with travel switches and connected with the PLC control system; the electromagnetic overflow valve and the electro-hydraulic reversing valve are both connected to the PLC control system.
6. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the inner diameter range of the first oil cylinder and the second oil cylinder is phi 50 mm-phi 120mm, and the stroke range is 100mm-300 mm.
7. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the power range of the motor is 11KW-250KW, and the installation form is B35, four poles, 380V and 50 Hz.
8. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the displacement range of the swash plate type axial plunger pump is 45ml/r-140ml/r, the rotation direction is clockwise rotation, and the working pressure range is 0-21 MPa.
9. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the working flow range of the electromagnetic overflow valve is 0-250L/min, and the working pressure range is 0-21 MPa.
10. The hydraulic system for smoothing cylinder movement and reducing system hydraulic shock according to claim 1 or 2, wherein: the working flow range of the electro-hydraulic reversing valve is 0-250L/min, and the working pressure range is 0-21 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023328870.1U CN214118612U (en) | 2020-12-31 | 2020-12-31 | Hydraulic system for enabling oil cylinder to stably move and reducing hydraulic impact of system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023328870.1U CN214118612U (en) | 2020-12-31 | 2020-12-31 | Hydraulic system for enabling oil cylinder to stably move and reducing hydraulic impact of system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214118612U true CN214118612U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023328870.1U Active CN214118612U (en) | 2020-12-31 | 2020-12-31 | Hydraulic system for enabling oil cylinder to stably move and reducing hydraulic impact of system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214118612U (en) |
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2020
- 2020-12-31 CN CN202023328870.1U patent/CN214118612U/en active Active
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