CN203176069U - Flexible unloading hydraulic system - Google Patents
Flexible unloading hydraulic system Download PDFInfo
- Publication number
- CN203176069U CN203176069U CN 201320140454 CN201320140454U CN203176069U CN 203176069 U CN203176069 U CN 203176069U CN 201320140454 CN201320140454 CN 201320140454 CN 201320140454 U CN201320140454 U CN 201320140454U CN 203176069 U CN203176069 U CN 203176069U
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- China
- Prior art keywords
- valve
- unloading
- flexible
- hydraulic system
- oil
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Abstract
The utility model discloses a flexible unloading hydraulic system. The flexible unloading hydraulic system comprises a main cylinder, an oil tank, a motor, an oil pump, a pressure control mechanism, a pressing oil line, an unloading oil line and a return stroke oil line. The unloading oil line comprises an electromagnetic valve, a throttling valve set and an unloading valve, wherein the electromagnetic valve is used for opening the unloading valve to conduct unloading, and the throttling valve set is connected with the unloading valve so as to adjust backpressure of the unloading valve, control the opening speed of the unloading valve, and then conduct flexible unloading. Therefore, the flexible unloading hydraulic system is small in impact, simple in structure and wide in range of application.
Description
Technical field
The utility model relates to a kind of hydraulic system, relates in particular to a kind of hydraulic system of flexible off-load.
Background technique
At present, the off-load of oil hydraulic cylinder mainly adopts liquid-filling valve or Proportional valve to carry out off-load.Big valve core was opened after the small valve core off-load was adopted in the liquid-filling valve off-load, reached the purpose of master cylinder off-load, opened big valve core again after opening small valve core by hydraulic coupling, and the aperture of spool is determined by Fabrication parameter during work, and is uncontrollable during work; Hydraulic system is impacted big, and the working life of element is all influential.And adopt Proportional valve to carry out off-load, the pressure unloading curve can be set, but hardware cost is very high, and Environmental Conditions is had relatively high expectations, particularly the turbidity test of hydraulic oil are required high, inapplicable under the not high enough occasion of cleanliness of hydraulic oil degree, influenced the using scope of product.
The model utility content
Technical problem to be solved in the utility model just provides the hydraulic system of a kind of flexible off-load simple in structure, that using scope is wide.
For solving the problems of the technologies described above, the utility model adopts following technological scheme, a kind of hydraulic system of flexible off-load, comprise master cylinder, fuel tank, motor, oil pump, pressure control mechanism, compacting oil circuit, off-load oil circuit and backhaul oil circuit, it is characterized in that: described off-load oil circuit comprises solenoid valve, throttle valve group and unloading valve, described solenoid valve is used for opening described unloading valve and carries out off-load, described throttle valve group links to each other with described unloading valve, regulate the back pressure pressure of described unloading valve, control the speed that described unloading valve is opened.
Preferably, described unloading valve comprises valve body, valve pocket, spool, described valve body comprises oil suction chamber and goes out oil pocket, described spool is located in the described valve pocket, and is pressed in the described valve body by spring and gland, and described valve body is provided with the conical bore that is communicated with described oil suction chamber, described spool end is provided with conus portion, described spool is along its axial-movement, and described conus portion opens and closes described conical bore, forms narrow ring runner between the sidewall of described spool and the described valve pocket.
Described spool comprises the tapering of extending from described conus portion along its axial direction and is located at the columnar portion of top, described tapering that described ring runner is formed jointly by the inwall of described valve pocket and the outer wall of described tapering and described columnar portion.
Preferably, described spool comprises the tapering along its axial direction extension from described conus portion, and described ring runner is formed jointly by inwall and the described tapering of described valve pocket.
Preferably, it is characterized in that: the cone angle in described tapering is 10 °-60 °.
Preferably, described throttle valve group comprises first throttle valve and second throttle valve, and described first throttle valve is connected with described unloading valve, and described second throttle valve links to each other with described solenoid valve.
Preferably, described pressure control mechanism is used for regulating the input pressure of described compacting oil circuit and the input pressure of described backhaul oil circuit, and described pressure control mechanism comprises system pressure valve and remote power feeding system pressure valve.
Preferably, described compacting oil circuit comprises oil-feed path and way to cycle oil, described oil-feed path comprises solenoid valve and cartridge valve, described cartridge valve is opened under the effect of described solenoid valve, medium flows into the epicoele of described master cylinder by described cartridge valve, medium promotes the actuator movement in the master cylinder, and the medium in the cavity of resorption of described master cylinder flows back to described fuel tank by way to cycle oil.
Preferably, described way to cycle oil comprises cartridge valve, cartridge valve, solenoid valve and solenoid valve, and described solenoid valve is used for the keying of the described cartridge valve of control, and described solenoid valve is used for the keying of the described cartridge valve of control.
Preferably, described backhaul oil circuit comprises in-line and liquid-filling valve, described in-line comprises solenoid valve and cartridge valve, described cartridge valve is opened under the effect of described solenoid valve, medium flows into the cavity of resorption of described master cylinder by described cartridge valve, medium promotes the actuator movement in the described master cylinder, and the medium in the epicoele of described master cylinder flows back to described fuel tank by liquid-filling valve.
The hydraulic system of a kind of flexible off-load of the utility model, in the off-load oil circuit, add solenoid valve, throttle valve group and unloading valve, described solenoid valve is used for opening described unloading valve and carries out off-load, described throttle valve group is used for regulating back pressure pressure in described unloading valve off-load process, control the speed that described unloading valve is opened, realize flexible off-load, oil circuit is simple, and is applied widely.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the hydraulic system schematic representation of a kind of flexible off-load of the utility model embodiment;
Fig. 2 be the utility model embodiment the structural representation of unloading valve;
Fig. 3 is A place enlarged view among Fig. 2.
Embodiment
As shown in Figure 1 to Figure 3, a kind of hydraulic system of flexible off-load, comprise master cylinder 32, fuel tank 2, motor 3, oil pump 1, pressure control mechanism, compacting oil circuit, off-load oil circuit and the described off-load oil circuit of backhaul oil circuit comprise solenoid valve 23, throttle valve group and unloading valve 21, described solenoid valve 23 is used for opening described unloading valve 21 and carries out off-load, described throttle valve group links to each other with described unloading valve, regulates the back pressure pressure of described unloading valve 21, controls the speed that described unloading valve 21 is opened.
Described unloading valve 21 comprises valve body 211, valve pocket 212, spool 213, described valve body comprises oil suction chamber 214 and goes out oil pocket 215, described spool 213 is located in the described valve pocket 212, and be pressed in the described valve body 211 by spring 219 and gland 220, described valve body is provided with the conical bore 217 that is communicated with described oil suction chamber 214, described spool 213 ends are provided with conus portion 216, described spool 213 is along its axial-movement, described conus portion 216 opens and closes described conical bore 217, forms narrow ring runner 218 between the sidewall of described spool 213 and the described valve pocket 212.The cone angle of described conus portion 216 is 10 °-60 °.
First embodiment of this programme ring runner 218: described spool 213 comprises the tapering 2131 of extending from described conus portion 216 along its axial direction and is located at the columnar portion 2132 of 2131 tops, described tapering that described ring runner is formed jointly by the inwall of described valve pocket 212 and the outer wall of described tapering 2131 and described columnar portion 2132.
Second embodiment of this programme ring runner 218: described spool 213 comprises the tapering 2131 along its axial direction extension from described conus portion 216, and described ring runner is formed jointly by inwall and the described tapering 2131 of described valve pocket 212.
Among the embodiment of above-mentioned two different ring runners 218, the shape difference of described spool 213, the sectional area of formed ring runner 218 is also unequal, the variable quantity of the sectional area of ring runner is exactly the speed that represents off-load speed, can the purpose that difform spool 213 is adjusted the off-load speed of described unloading valve 21 need be set according to reality, adapt to different user demands.Among above-mentioned two embodiments, the cone angle in described tapering 2131 is α, 10 °≤α≤60 °
Because will form described ring runner 218 between the sidewall of described spool 213 and described valve pocket 212, described spool 213 is longer than the spool of unloading valve in the prior art, so that the sidewall of spool 213 will have enough spaces for described ring runner 218 is set.Because spool is in movement process, the sectional area of ring runner becomes more big along with the aperture (move distance) of the spool 213 of unloading valve 21 is more long.Like this, the corresponding lengthening of control stroke of long spool 213, just big for regulated quantity in the off-load process, just can effectively eliminate or reduce off-load and impact.
When off-load begins, the described unloading valve of solenoid valve 23 controls is opened, hydraulic oil oil flows back to fuel tank by throttle valve 22,24, preset the aperture of described throttle valve 22 and described throttle valve 24 earlier, when solenoid valve has just been opened, the spool 213 of lotus valve 21 is mobile backward under interior pressure effect, owing to be subjected to the effect of throttling, movement velocity is slower, if fruit finds that off-load speed is fast this moment, can regulate the aperture of throttle valve 22, throttle valve 24, the aperture of described throttle valve 22, throttle valve 24 is diminished, also can transfer slowly otherwise cross.Adopt two throttle valve transfer back pressures, it is big that the scope that can regulate becomes, and the difficulty of manual tune reduces.
Described pressure control mechanism is used for regulating the input pressure of described compacting oil circuit and the input pressure of described backhaul oil circuit, and described pressure control mechanism comprises system pressure valve 4 and remote power feeding system pressure valve 5.
Described compacting oil circuit comprises oil-feed path and way to cycle oil, described oil-feed path comprises solenoid valve 19 and cartridge valve 14, described motor 2 drives described oil pump 1 and produces highly pressurised liquid, under the common regulating action of described system pressure valve 4 and remote power feeding system pressure valve 5, produce the hydraulic oil of required oil pressure, described cartridge valve 14 is opened under the effect of described solenoid valve 19, medium flows into the epicoele of described master cylinder 32 by described cartridge valve 14, medium promotes the actuator movement in the described master cylinder 32, it is descending that executive component drives slide block 31, suppress, the medium in the cavity of resorption of described master cylinder 32 flows back to described fuel tank 2 by way to cycle oil.Concrete, described way to cycle oil comprises cartridge valve 11, cartridge valve 12, solenoid valve 16 and solenoid valve 17, and described solenoid valve 16 is used for the keying of the described cartridge valve 11 of control, and described solenoid valve 17 is used for the keying of the described cartridge valve 12 of control.Hydraulic oil is got back to fuel tank 2 by described cartridge valve 11 and described cartridge valve 12.
Described backhaul oil circuit comprises in-line and liquid-filling valve 33, described in-line comprises solenoid valve 18 and cartridge valve 13, described cartridge valve 13 is opened under the effect of described solenoid valve 18, medium flows into the cavity of resorption of described master cylinder 32 by described cartridge valve 13, medium promotes the actuator movement in the described master cylinder 32, and the medium in the epicoele of described master cylinder 32 flows back to described fuel tank 2 by liquid-filling valve 33.Finish a work cycle.
Claims (10)
1. the hydraulic system of a flexible off-load, comprise master cylinder (32), fuel tank (2), motor (3), oil pump (1), pressure control mechanism, compacting oil circuit, off-load oil circuit and backhaul oil circuit, it is characterized in that: described off-load oil circuit comprises solenoid valve (23), throttle valve group and unloading valve (21), described solenoid valve (23) is used for opening described unloading valve (21) and carries out off-load, described throttle valve group links to each other with described unloading valve, regulate the back pressure pressure of described unloading valve (21), control the speed that described unloading valve (21) is opened.
2. the hydraulic system of a kind of flexible off-load according to claim 1, it is characterized in that: described unloading valve (21) comprises valve body (211), valve pocket (212), spool (213), described valve body (211) comprises oil suction chamber (214) and goes out oil pocket (215), described spool (213) is located in the described valve pocket (212), and be pressed in the described valve body (211) by spring (219) and gland 220, described valve body is provided with the conical bore (217) that is communicated with described oil suction chamber (214), described spool (213) end is provided with conus portion (216), described spool (213) is along its axial-movement, described conus portion (216) opens and closes described conical bore (217), forms narrow ring runner (218) between the sidewall of described spool (213) and the described valve pocket (212).
3. the hydraulic system of a kind of flexible off-load according to claim 2, it is characterized in that: described spool (213) comprises the tapering (2131) of extending from described conus portion (216) along its axial direction and is located at the columnar portion (2132) of top, described tapering (2131) that described ring runner is formed jointly by the inwall of described valve pocket (212) and the outer wall of described tapering (2131) and described columnar portion (2132).
4. the hydraulic system of a kind of flexible off-load according to claim 2, it is characterized in that: described spool (213) comprises the tapering (2131) along its axial direction extension from described conus portion (216), and described ring runner is formed jointly by inwall and described tapering (2131) of described valve pocket (212).
5. according to the hydraulic system of claim 3 or 4 described a kind of flexible off-loads, it is characterized in that: the cone angle of described tapering (2131) is 10 °-60 °.
6. the hydraulic system of a kind of flexible off-load according to claim 1, it is characterized in that: described throttle valve group comprises first throttle valve (22) and second throttle valve (24), described first throttle valve (22) is connected with described unloading valve (21), and described second throttle valve (24) links to each other with described solenoid valve (23).
7. the hydraulic system of a kind of flexible off-load according to claim 1, it is characterized in that: described pressure control mechanism is used for regulating the input pressure of described compacting oil circuit and the input pressure of described backhaul oil circuit, and described pressure control mechanism comprises system pressure valve (4) and remote power feeding system pressure valve (5).
8. the hydraulic system of a kind of flexible off-load according to claim 1, it is characterized in that: described compacting oil circuit comprises oil-feed path and way to cycle oil, described oil-feed path comprises solenoid valve (19) and cartridge valve (14), described cartridge valve (14) is opened under the effect of described solenoid valve (19), medium flows into the epicoele of described master cylinder (32) by described cartridge valve (14), medium promotes the actuator movement in the described master cylinder (32), and the medium in the cavity of resorption of described master cylinder (32) flows back to described fuel tank (2) by way to cycle oil.
9. the hydraulic system of a kind of flexible off-load according to claim 8, it is characterized in that: described way to cycle oil comprises cartridge valve (11), cartridge valve (12), solenoid valve (16) and solenoid valve (17), described solenoid valve (16) is used for the keying of the described cartridge valve of control (11), and described solenoid valve (17) is used for the keying of the described cartridge valve of control (12).
10. the hydraulic system of a kind of flexible off-load according to claim 1, it is characterized in that: described backhaul oil circuit comprises in-line and liquid-filling valve (33), described in-line comprises solenoid valve (18) and cartridge valve (13), described cartridge valve (13) is opened under the effect of described solenoid valve (18), medium flows into the cavity of resorption of described master cylinder (32) by described cartridge valve (13), medium promotes the actuator movement in the described master cylinder (32), and the medium in the epicoele of described master cylinder (32) flows back to described fuel tank (2) by liquid-filling valve (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320140454 CN203176069U (en) | 2013-03-26 | 2013-03-26 | Flexible unloading hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320140454 CN203176069U (en) | 2013-03-26 | 2013-03-26 | Flexible unloading hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176069U true CN203176069U (en) | 2013-09-04 |
Family
ID=49072772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320140454 Withdrawn - After Issue CN203176069U (en) | 2013-03-26 | 2013-03-26 | Flexible unloading hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195773A (en) * | 2013-03-26 | 2013-07-10 | 湖州机床厂有限公司 | Flexible unloading hydraulic system |
| CN107364062A (en) * | 2017-09-08 | 2017-11-21 | 泉州市世创机械制造有限公司 | A kind of EVA injectors hydraulic control system |
-
2013
- 2013-03-26 CN CN 201320140454 patent/CN203176069U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195773A (en) * | 2013-03-26 | 2013-07-10 | 湖州机床厂有限公司 | Flexible unloading hydraulic system |
| CN103195773B (en) * | 2013-03-26 | 2015-12-23 | 湖州机床厂有限公司 | A kind of hydraulic system of flexible off-load |
| CN107364062A (en) * | 2017-09-08 | 2017-11-21 | 泉州市世创机械制造有限公司 | A kind of EVA injectors hydraulic control system |
| CN107364062B (en) * | 2017-09-08 | 2023-12-29 | 泉州市世创机械制造有限公司 | EVA injection machine hydraulic control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |