CN107461518B - Oil return one-way valve - Google Patents
Oil return one-way valve Download PDFInfo
- Publication number
- CN107461518B CN107461518B CN201710763298.5A CN201710763298A CN107461518B CN 107461518 B CN107461518 B CN 107461518B CN 201710763298 A CN201710763298 A CN 201710763298A CN 107461518 B CN107461518 B CN 107461518B
- Authority
- CN
- China
- Prior art keywords
- valve core
- stage valve
- opening
- spring seat
- hydraulic oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003921 oil Substances 0.000 claims abstract description 28
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 22
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses an oil return one-way valve, and belongs to the field of hydraulic systems. The hydraulic oil plugging valve comprises a three-way valve body, wherein a first-stage valve core, a second-stage valve core, a spring and a spring seat are arranged in a channel from an opening A to an opening B of the three-way valve body, the first-stage valve core is provided with a through hole, the second-stage valve core is arranged in the first-stage valve core through hole, the spring is arranged between the second-stage valve core and the spring seat, the distance from the rear end of the first-stage valve core to the spring seat is smaller than the distance from the second-stage valve core to the spring seat, and the first-stage valve core is plugged at an opening C when no hydraulic oil passes through. The hydraulic oil return device is used for a hydraulic system of engineering machinery, and can realize that hydraulic oil passes through the radiator first and then returns to the oil tank, and if the radiator is blocked, the oil return quantity is too large and the like, the hydraulic oil can directly return to the oil tank without passing through the radiator.
Description
Technical Field
The invention belongs to a part of an excavator, and particularly relates to an oil return one-way valve.
Background
Hydraulic excavators are construction machines that rely on an engine to convert fossil fuel into thermal energy and then ultimately to convert the thermal energy into mechanical energy for an implement to accomplish a predetermined earthwork. From the engine to the actuator, the medium of energy transfer is hydraulic oil. During operation, the hydraulic oil is fed from the hydraulic pump to the main control valve, to the executing device, to the main control valve and to the oil tank. When the hydraulic oil returns to the oil tank from the main control valve, the temperature is higher. The higher oil temperature causes a number of problems such as accelerated aging of hydraulic oil, internal leakage of hydraulic components, etc., which not only reduces the performance of the whole machine, but also affects the service life of the whole machine. In order to maintain the oil temperature of the hydraulic oil within a reasonable range, the hydraulic oil passes through the radiator before returning to the oil tank. However, if the radiator is blocked and the oil return amount is too large, the oil return tank is directly used without passing through the radiator. In order to achieve the purpose, the existing excavator adopts an oil return check valve, the structure is mainly composed of two valve assemblies, the adopted structure is complex, and the cost is high.
Disclosure of Invention
The invention aims to provide an oil return one-way valve so as to overcome the defects of complex structure and high use cost caused by the fact that two valve assemblies are adopted for the oil return one-way valve on an excavator in the prior art.
The invention is realized by adopting the following technical scheme:
the oil return check valve comprises a three-way valve body, wherein a first-stage valve core, a second-stage valve core, a spring and a spring seat are arranged in a channel from an opening A to an opening B of the three-way valve body, the first-stage valve core is provided with a through hole, the second-stage valve core is arranged in the first-stage valve core through hole, the spring is arranged between the second-stage valve core and the spring seat, the distance from the rear end of the first-stage valve core to the spring seat is smaller than the distance from the second-stage valve core to the spring seat, and the first-stage valve core is blocked at the opening C when no hydraulic oil passes through.
And the secondary valve core is provided with an orifice.
The spring seat is limited through a clamp spring.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention is convenient to assemble and disassemble, and is extremely convenient to use and maintain no matter the whole machine is assembled;
2) The invention has convenient parameter adjustment, can adjust the precompression force of the spring or the acting area of the secondary valve core to obtain different back pressures according to the back pressure requirements of different models, and can obtain different through-flow rates flowing to the oil tank by adjusting the orifice size of the secondary valve core;
3) The invention has simple structure, fewer parts and low cost, and the application of the product enables the cost of the whole machine to be lower and has more competitive advantage.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1. a three-way valve body; 2. a primary valve core; 3. a secondary valve core; 4. a spring; 5. a spring seat; 6. clamping springs; 7. an orifice.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the oil return one-way valve comprises a three-way valve body 1, wherein a first-stage valve core 2, a second-stage valve core 3, a spring 4 and a spring seat 5 are arranged in a channel from an opening to an opening of the three-way valve body 1A, the first-stage valve core 2 is provided with a through hole, the second-stage valve core 3 is arranged in the through hole of the first-stage valve core 2, the spring 4 is arranged between the second-stage valve core 3 and the spring seat 5, and the distance from the rear end of the first-stage valve core 2 to the spring seat 5 is smaller than the distance from the rear end of the second-stage valve core 3 to the spring seat 5, so that when the flow rate of hydraulic oil reaches a certain value, the first-stage valve core 2 firstly touches the spring seat 5, and then the second-stage valve core 3 is further opened; when no hydraulic oil passes through the three-way valve body 1, the primary valve core 2 is blocked at the C port. An orifice 7 is arranged on the secondary valve core 3, and the orifice 7 is used for passing hydraulic oil flowing to the port B; the spring seat 5 is limited by a clamp spring 6.
When the hydraulic oil flowing in from the oil inlet A is smaller than the set flow Q L/min and smaller, only the primary valve core 2 is opened under the action of hydraulic pressure, and the oil flows to the C through the A port and flows to the radiator.
When the flow rate is increased but still not more than Q L/min, the primary valve core 2 is pushed to the rightmost side and limited by the spring seat 5, and the flow area flowing to the port C reaches the maximum value at the moment and is not changed.
When the flow rate continues to increase and exceeds Q L/min, the flow area flowing to the port C reaches the maximum value at the moment and does not change, the pressure of hydraulic oil continues to increase, the secondary valve core 3 is opened, and a part of oil passes through the throttle orifice 7 of the secondary valve core 3 and then returns to the oil tank through the port B. The smaller the area of the orifice 7 is, the smaller the flow of the oil returning tank directly passing through the port B is under the same pressure; the larger the orifice 7, the greater the flow directly through the port B back to the tank at the same pressure.
Claims (1)
1. The utility model provides an oil return check valve, includes three-way valve body (1), its characterized in that: the three-way valve is characterized in that a first-stage valve core (2), a second-stage valve core (3), a spring (4) and a spring seat (5) are arranged in a channel from an opening A to an opening B of the three-way valve body (1), the spring seat (5) is limited by a clamp spring (6), the first-stage valve core (2) is provided with a through hole, the second-stage valve core (3) is arranged in the through hole of the first-stage valve core (2), the spring (4) is arranged between the second-stage valve core (3) and the spring seat (5), the distance from the rear end of the first-stage valve core (2) to the spring seat (5) is smaller than the distance from the second-stage valve core (3) to the spring seat (5), when no hydraulic oil passes through, the first-stage valve core (2) is blocked at the opening C, an orifice (7) is arranged on the second-stage valve core (3), when the hydraulic oil flowing from the opening A is smaller than a set flow Q L/min, and when the hydraulic oil is smaller, under the action, the hydraulic oil flows to the opening C opening through the opening A; when the flow rate is increased but still not more than Q L/min, the primary valve core (2) is pushed to the rightmost side and limited by the spring seat (5), and the flow area flowing to the port C reaches the maximum value at the moment and is not changed any more; when the flow rate continues to increase and exceeds Q L/min, the flow area flowing to the port C reaches the maximum value at the moment and does not change any more, the pressure of hydraulic oil continues to increase, the secondary valve core (3) is opened, and a part of oil passes through the throttle (7) of the secondary valve core (3) and then returns to the oil tank through the port B; the smaller the area of the orifice (7) is, the smaller the flow of the oil returning tank directly passing through the port B is under the same pressure; the larger the orifice (7), the greater the flow directly through the port B back to the tank at the same pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763298.5A CN107461518B (en) | 2017-08-30 | 2017-08-30 | Oil return one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763298.5A CN107461518B (en) | 2017-08-30 | 2017-08-30 | Oil return one-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107461518A CN107461518A (en) | 2017-12-12 |
| CN107461518B true CN107461518B (en) | 2023-11-21 |
Family
ID=60550835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710763298.5A Active CN107461518B (en) | 2017-08-30 | 2017-08-30 | Oil return one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107461518B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081211B (en) * | 2019-04-28 | 2020-08-18 | 贵州曼格维流体智能科技有限公司 | One-way valve for satellite attitude and orbit control propellant supply system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201748005U (en) * | 2010-06-25 | 2011-02-16 | 徐州徐工挖掘机械有限公司 | Sectional overflow valve |
| CN202024647U (en) * | 2011-01-12 | 2011-11-02 | 广西柳工机械股份有限公司 | Safety valve of radiator |
| CN202165350U (en) * | 2011-01-27 | 2012-03-14 | 天津市友达机电液成套设备有限公司 | Hydraulic system current collector with by-pass function |
| JP2013117293A (en) * | 2011-12-05 | 2013-06-13 | Shimadzu Corp | Flow control valve |
| CN103527545A (en) * | 2013-10-25 | 2014-01-22 | 安徽建筑大学 | Combined hydraulic flow control valve |
| CN105090152A (en) * | 2015-09-11 | 2015-11-25 | 福州大学 | Two-stage double-spring direct relief valve and control method thereof |
| CN205503593U (en) * | 2016-02-02 | 2016-08-24 | 上海朝田实业股份有限公司 | Child formula ultralow pressure overflow valve |
| CN106545537A (en) * | 2015-09-22 | 2017-03-29 | 无锡市德美嘉机械科技有限公司 | A kind of stroking mechanism of hydraulic servo variable pump |
| CN207261731U (en) * | 2017-08-30 | 2018-04-20 | 山东临工工程机械有限公司 | Return check valve |
-
2017
- 2017-08-30 CN CN201710763298.5A patent/CN107461518B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201748005U (en) * | 2010-06-25 | 2011-02-16 | 徐州徐工挖掘机械有限公司 | Sectional overflow valve |
| CN202024647U (en) * | 2011-01-12 | 2011-11-02 | 广西柳工机械股份有限公司 | Safety valve of radiator |
| CN202165350U (en) * | 2011-01-27 | 2012-03-14 | 天津市友达机电液成套设备有限公司 | Hydraulic system current collector with by-pass function |
| JP2013117293A (en) * | 2011-12-05 | 2013-06-13 | Shimadzu Corp | Flow control valve |
| CN103527545A (en) * | 2013-10-25 | 2014-01-22 | 安徽建筑大学 | Combined hydraulic flow control valve |
| CN105090152A (en) * | 2015-09-11 | 2015-11-25 | 福州大学 | Two-stage double-spring direct relief valve and control method thereof |
| CN106545537A (en) * | 2015-09-22 | 2017-03-29 | 无锡市德美嘉机械科技有限公司 | A kind of stroking mechanism of hydraulic servo variable pump |
| CN205503593U (en) * | 2016-02-02 | 2016-08-24 | 上海朝田实业股份有限公司 | Child formula ultralow pressure overflow valve |
| CN207261731U (en) * | 2017-08-30 | 2018-04-20 | 山东临工工程机械有限公司 | Return check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107461518A (en) | 2017-12-12 |
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