CN214945333U - Constant-pressure-maintaining hydraulic system - Google Patents
Constant-pressure-maintaining hydraulic system Download PDFInfo
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- CN214945333U CN214945333U CN202120227615.3U CN202120227615U CN214945333U CN 214945333 U CN214945333 U CN 214945333U CN 202120227615 U CN202120227615 U CN 202120227615U CN 214945333 U CN214945333 U CN 214945333U
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Abstract
The utility model discloses a invariable hydraulic system of pressurize belongs to hydraulic system technical field, including oil tank, variable pump, hydro-cylinder and pressurize oil circuit, the oil inlet of variable pump with the oil tank is connected, the oil-out of variable pump is equipped with first check valve, the export oil circuit of first check valve is connected with the electromagnetic directional valve, the first work hydraulic fluid port of electromagnetic directional valve is connected the rodless chamber of hydro-cylinder, the second work hydraulic fluid port of electromagnetic directional valve is connected the pole chamber that has of hydro-cylinder, the pressurize oil circuit is located first check valve with on the oil circuit between the electromagnetic directional valve, the pressurize oil circuit includes high-pressure energy storage ware and high pressure sensor, the utility model has the advantages of pressurize, stable.
Description
Technical Field
The utility model relates to a hydraulic system technical field specifically is a invariable hydraulic system of pressurize.
Background
The hydraulic system functions to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely a power element, an execution element, a control element, an auxiliary element and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. Hydraulic drive systems have as a primary function the transmission of power and motion. Hydraulic control systems are designed to provide a hydraulic system output that meets specific performance requirements, and are generally referred to as hydraulic drive systems.
Therefore, the person skilled in the relevant art improves this, for example, chinese patent application No. CN211975539U proposes "a hydraulic system with pressure maintaining and stabilizing function", which includes an oil tank, an oil pump, an overflow valve, an oil cylinder, a reversing valve and a pressure stabilizing oil path, although the utility model discloses can satisfy the characteristics of the fluctuation of the buffering compression roller to the fluctuation of the oil path internal volume.
However, the technical scheme in the application document still has the defects that the oil pressure is lost in the process of high-speed movement of the oil cylinder, and the movement of the oil cylinder is unstable.
Based on this, the utility model designs a invariable hydraulic system of pressurize to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic system that pressurize is invariable to solve above-mentioned technical problem.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a constant hydraulic system of pressurize, includes oil tank, variable pump, hydro-cylinder and pressurize oil circuit, the oil inlet of variable pump with the oil tank is connected, the oil-out of variable pump is equipped with first check valve, the export oil circuit of first check valve is connected with the electromagnetic directional valve, the first work hydraulic fluid port of electromagnetic directional valve is connected the rodless chamber of hydro-cylinder, the second work hydraulic fluid port of electromagnetic directional valve is connected the pole chamber that has of hydro-cylinder, the pressurize oil circuit is located first check valve with on the oil circuit between the electromagnetic directional valve, the pressurize oil circuit includes high-pressure energy storage ware and high pressure sensor.
Preferably, a high-pressure filter is further arranged between the oil outlet of the variable displacement pump and the check valve, the high-pressure filter comprises a main filtering oil path, a bypass oil path and a pressure switch, the bypass oil path is connected with the main filtering oil path in parallel, and a second check valve is arranged on the bypass oil path.
Preferably, the lateral wall of oil tank is equipped with the level gauge, the lateral wall bottom of oil tank is equipped with the fuel outlet valve, just the fuel outlet valve is located the below of level gauge.
Preferably, the electromagnetic directional valve is a three-position four-way directional valve.
Preferably, an air filter is arranged at the top of the oil tank and is communicated with the oil in the oil tank.
Preferably, the pressure maintaining oil circuit further comprises a high-pressure gauge, and the high-pressure gauge is located at an oil inlet of the high-pressure accumulator.
Compared with the prior art, the beneficial effects of the utility model are that: the oil pressure maintaining oil way comprises a high-pressure energy accumulator and a high-pressure sensor, oil in the oil tank passes through the variable pump and then passes through the electromagnetic directional valve to drive the oil cylinder to stretch, when the oil pressure of an oil outlet of the variable pump is smaller than a set pressure value of the high-pressure sensor, the oil of the high-pressure energy accumulator flows out and drives the oil cylinder to stretch together with the oil of the variable pump, meanwhile, the power of the variable pump is increased to increase the oil pressure of the oil outlet of the variable pump, when the oil pressure of the oil outlet of the variable pump is larger than the set pressure value of the high-pressure sensor, the oil of the oil outlet of the variable pump supplies oil to the high-pressure energy accumulator, on the other hand, the oil cylinder continues to drive the oil cylinder to stretch through the electromagnetic directional valve, and therefore the oil cylinder stretches stably and has efficacy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic structural diagram of a three-position, four-way reversing valve according to this embodiment;
fig. 3 is a schematic structural diagram of the high pressure filter in this embodiment.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an oil tank; 11. a liquid level meter; 12. an oil drain valve; 13. an air cleaner; 2. a variable displacement pump; 21. a motor; 3. an oil cylinder; 4. a pressure maintaining oil way; 41. a high pressure accumulator; 42. a high pressure sensor; 43. a high pressure gauge; 5. a first check valve; 6. an electromagnetic directional valve; 7. a high pressure filter; 71. a main filtering oil path; 72. a bypass oil path; 721. a second one-way valve; 73. and (6) a pressure switch.
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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a constant pressure maintaining hydraulic system comprises an oil tank 1, a variable pump 2, an oil cylinder 3 and a pressure maintaining oil path 4, wherein an oil inlet of the variable pump 2 is connected with the oil tank 1, an oil outlet of the variable pump 2 is provided with a first one-way valve 5, an outlet oil path of the first one-way valve 5 is connected with an electromagnetic directional valve 6, a first working oil port of the electromagnetic directional valve 6 is connected with a rodless cavity of the oil cylinder 3, a second working oil port of the electromagnetic directional valve 6 is connected with a rod cavity of the oil cylinder 3, the pressure maintaining oil path 4 is arranged on an oil path between the first one-way valve 5 and the electromagnetic directional valve 6, the pressure maintaining oil path 4 comprises a high-pressure energy accumulator 41 and a high-pressure sensor 42, in the embodiment, the electromagnetic directional valve 6 is a three-position four-way directional valve, specifically, a port P of the three-position four-way directional valve is communicated with the outlet of the first one-way valve 5 and the pressure maintaining oil path 4, a port of the three-position four-way directional valve is communicated with the oil tank, a port of the three-position four-way valve is connected with the rod cavity of the oil cylinder 3, the port B of the three-position four-way reversing valve is connected with a rodless cavity of the oil cylinder 3, in the embodiment, a central controller (not marked in the figure) and a motor 21 are further arranged, the output end of the motor 21 is connected with the variable pump 2, and the central controller is respectively and electrically connected with the high-pressure sensor 42, the motor 21 and the electromagnetic reversing valve 6.
Preferably, a high-pressure filter 7 is further arranged between the oil outlet of the variable pump 2 and the check valve, the high-pressure filter 7 comprises a main filtering oil path 71, a bypass oil path 72 and a pressure switch 73, the bypass oil path 72 is connected with the main filtering oil path 71 in parallel, the second check valve 721 is arranged on the bypass oil path 72, the pressure switch 73 is electrically connected with the central controller, the second check valve 721 and the pressure switch 73 are arranged, when the main filtering oil path 71 is blocked, oil cannot reach the first check valve 5 through the main filter 71 due to the fact that the variable pump 2 works, the second check valve 721 is opened at the moment, oil pipe breakage caused by the fact that oil pressure rises all the time is avoided, meanwhile, the pressure switch 73 acts to send a pressure signal to the central controller, and people are reminded of replacing the filter of the main filtering oil path.
Preferably, the lateral wall of oil tank 1 is equipped with level gauge 11, and the lateral wall bottom of oil tank 1 is equipped with fuel outlet valve 12, and fuel outlet valve 12 is located the below of level gauge 11, sets up level gauge 11 and is convenient for observe how much of oil in the oil tank 1, sets up fuel outlet valve 12 and can be convenient for wash oil tank 1 with the whole light of letting off of oil in the oil tank 1.
Preferably, an air filter 13 is arranged at the top of the oil tank 1, the air filter 13 is communicated with the oil in the oil tank 1, and the air filter 13 is arranged to facilitate the oil in the oil tank 1 to be pumped out by the variable displacement pump 2.
Preferably, the pressure maintaining oil path 4 further comprises a high pressure gauge 43, and the high pressure gauge 43 is located at an oil inlet of the high pressure accumulator 41.
One specific application of this embodiment is: when the oil cylinder 3 needs to be extended, the motor 21 is started, the motor 21 drives the variable pump 2 to pump out oil in the oil tank 1, the oil passes through the high-pressure filter 7, then passes through the first one-way valve 5 and then passes through the electromagnetic directional valve 6 to drive the extension of the oil cylinder 3, at first, when the high-pressure sensor 42 detects that the oil pressure at the outlet of the first one-way valve 5 is too small, the oil in the high-pressure energy accumulator 41 continuously drives the extension of the oil cylinder 3 through the electromagnetic directional valve 6, and meanwhile, the rotating speed of the motor 21 is increased to improve the power of the variable pump 2, when the high-pressure sensor 42 detects that the oil pressure at the outlet of the first one-way valve 5 is too large, the oil outlet of the variable pump 2 supplies oil to the high-pressure energy accumulator 41 on one hand, and supplies oil to the electromagnetic directional valve 6 on the other hand, and simultaneously, the rotating speed of the motor 21 is reduced to reduce the power of the variable pump 2.
In summary, the variable pump 2, the electromagnetic directional valve 6, the oil cylinder 3 and the pressure maintaining oil path 4 are arranged, the pressure maintaining oil path 4 includes a high-pressure energy accumulator 41 and a high-pressure sensor 42, oil in the oil tank 1 passes through the variable pump 2 and then passes through the electromagnetic directional valve 6 to drive the oil cylinder 3 to stretch, when the oil pressure of the oil outlet of the variable pump 2 is smaller than the set pressure value of the high-pressure sensor 42, the oil in the high-pressure energy accumulator 41 flows out and drives the oil cylinder 3 to stretch together with the oil in the variable pump 2, and simultaneously, the power of the variable pump 2 is increased to increase the oil pressure of the oil outlet of the variable pump 2, when the oil pressure of the oil outlet of the variable pump 2 is larger than the set pressure value of the high-pressure sensor 42, the oil in the oil outlet of the variable pump 2 supplies oil to the high-pressure energy accumulator 41, and on the other hand, the oil cylinder 3 continues to drive the stretching through the electromagnetic directional valve 6, so that the oil cylinder 3 stretches stably and has the pressure maintaining effect.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a constant hydraulic system of pressurize, its characterized in that, includes oil tank (1), variable pump (2), hydro-cylinder (3) and pressurize oil circuit (4), the oil inlet of variable pump (2) with oil tank (1) is connected, the oil-out of variable pump (2) is equipped with first check valve (5), the export oil circuit of first check valve (5) is connected with solenoid directional valve (6), the first working oil port of solenoid directional valve (6) is connected the rodless chamber of hydro-cylinder (3), the second working oil port of solenoid directional valve (6) is connected the pole chamber that has of hydro-cylinder (3), pressurize oil circuit (4) are located first check valve (5) with on the oil circuit between solenoid directional valve (6), pressurize oil circuit (4) include high pressure accumulator (41) and high pressure sensor (42).
2. The constant dwell pressure hydraulic system of claim 1, wherein: a high-pressure filter (7) is further arranged between an oil outlet of the variable pump (2) and the one-way valve, the high-pressure filter (7) comprises a main filtering oil path (71), a bypass oil path (72) and a pressure switch (73), the bypass oil path (72) is connected with the main filtering oil path (71) in parallel, and a second one-way valve (721) is arranged on the bypass oil path (72).
3. The constant dwell pressure hydraulic system of claim 1, wherein: the lateral wall of oil tank (1) is equipped with level gauge (11), the lateral wall bottom of oil tank (1) is equipped with fuel outlet valve (12), just fuel outlet valve (12) are located the below of level gauge (11).
4. The constant dwell pressure hydraulic system of claim 1, wherein: the electromagnetic directional valve (6) is a three-position four-way directional valve.
5. The constant dwell pressure hydraulic system of claim 1, wherein: the top of oil tank (1) is equipped with air cleaner (13), just air cleaner (13) with the oil intercommunication in the oil tank (1).
6. The constant dwell pressure hydraulic system of claim 1, wherein: the pressure maintaining oil way (4) further comprises a high-pressure gauge (43), and the high-pressure gauge (43) is located at an oil inlet of the high-pressure energy accumulator (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227615.3U CN214945333U (en) | 2021-01-27 | 2021-01-27 | Constant-pressure-maintaining hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227615.3U CN214945333U (en) | 2021-01-27 | 2021-01-27 | Constant-pressure-maintaining hydraulic system |
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| CN214945333U true CN214945333U (en) | 2021-11-30 |
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| CN202120227615.3U Active CN214945333U (en) | 2021-01-27 | 2021-01-27 | Constant-pressure-maintaining hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076116A (en) * | 2022-06-29 | 2022-09-20 | 歌尔股份有限公司 | Pressure maintaining pump, pressure maintaining device and processing equipment |
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- 2021-01-27 CN CN202120227615.3U patent/CN214945333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076116A (en) * | 2022-06-29 | 2022-09-20 | 歌尔股份有限公司 | Pressure maintaining pump, pressure maintaining device and processing equipment |
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