CN202108799U - Large-flow hydraulic feedback pilot control cartridge proportional throttling valve - Google Patents
Large-flow hydraulic feedback pilot control cartridge proportional throttling valve Download PDFInfo
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- CN202108799U CN202108799U CN2011201846160U CN201120184616U CN202108799U CN 202108799 U CN202108799 U CN 202108799U CN 2011201846160 U CN2011201846160 U CN 2011201846160U CN 201120184616 U CN201120184616 U CN 201120184616U CN 202108799 U CN202108799 U CN 202108799U
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Abstract
The utility model relates to a large-flow hydraulic feedback pilot control cartridge proportional throttling valve, in particular to positive and negative flow large-flow hydraulic feedback pilot control cartridge proportional throttling valve engineering machinery equipment. In the large-flow hydraulic feedback pilot control cartridge proportional throttling valve, the side face of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet; a main valve core is arranged in the axial hole of the main valve sleeve; a No.1 one-way valve is arranged in the axial hole of the main valve core; one end of the main valve core is provided with a crisscross throttling groove; the other end of the main valve core is provided with a slender throttling hole; a pilot valve core is arranged in the axial hole of a pilot valve sleeve; a return spring is arranged between the pilot valve core and a threaded sleeve; one end of a No.2 one-way valve is communicated with a main valve core control cavity; one end of the No.2 one-way valve is communicated with a No.3 pilot valve control port; and one end of the No.2 one-way valve is communicated with a No.1 control port. The large-flow hydraulic feedback pilot control cartridge proportional throttling valve has the advantages of simple structure, instantaneous startup proportional control, high linearity and small hysteresis, and is widely applied to hydraulic control systems in the fields of engineering machinery, machine tool forging, metallurgy, ships and mines.
Description
Technical field
The utility model relates to a kind of high-volume hydraulic feedback guide and controls the plug-in type proportional throttle valve, and particularly big flow, high-power, pilot valve proportional control flow, forward and reverse mobile high-volume hydraulic feedback guide control plug-in type proportional throttle valve engineering mechanical device.
Background technique
At present, what used multiple directional control valve all adopted in the engineering machinery is that valve core of the spool valve adds the structure of casting valve body, owing to receive the influence of system pressure and body strength restriction, 12 millimeters latus rectums of its latus rectum maximum application to two; Can not break through the flow of 25 millimeters latus rectums always, adopt above structure promptly to enable to reach, cost is also quite expensive, and the user can not accept; So till now, the domestic engineering machinery that always can not produce high-power, big flow, for example: 500 horsepowers of bulldozers are as using above structure, and its pressure loss reaches 30 kilograms; Energy consumption is high, and external form is bulky, and it is bigger to take up room; While control section complex structure, rate of fault is high, leaks serious; Action is unstable, impacts greatly, and maintenance is inconvenient.
Summary of the invention
The purpose of the utility model provides a kind of high-volume hydraulic feedback guide and controls the plug-in type proportional throttle valve, and it is that pilot stage adopts the control of hydraulic pilot valve, and amplifier stage adopts servo spool, realizes that hydraulic power amplifies, and main adopts the cartridge valve mode of structure; Increase amplifier stage control and hydraulic flow closed-loop feedback between pilot stage and the main, realize the unlatching of spool ratio, respond rapidly, closed safe is reliable, and the linearity is high, stagnates and encircles little purpose.
The utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve and takes following technological scheme to realize: it is made up of main valve housing, main valve plug, guide's valve pocket, guide's spool and control cover plate, and the side of main valve housing is provided with main valve filler opening and main valve oil outlet, device main valve plug in the axial bore of main valve housing; The number one one-way valve is set in the main valve plug axial bore, and the number one one-way valve is made up of number one valve seat and number one cup head spool, and main valve plug one end is provided with cross throttling groove; The main valve plug the other end is provided with elongated throttle orifice, and elongated throttle orifice one end is communicated with the number one one-way valve, and elongated throttle orifice one end is communicated with the main valve plug control chamber; Control cover plate is arranged on the main valve housing upper end, and the control cover plate end face axial is provided with pilot valve, and pilot valve is made up of guide's valve pocket, guide's spool and swivel nut; In the pilot valve cover axial bore guide's spool is set; Guide's valve pocket one end is provided with swivel nut, between guide's spool and the swivel nut Returnning spring is set, No. second control mouth of number one pilot valve control mouthful connection; No. second pilot valve control mouthful connection main valve plug control chamber; No. three pilot valve control mouthful connection number one control mouth, No. four pilot valve control mouthful connection return opening, the control cover plate side axial is provided with one-way valve No. second; No. second one-way valve one end is provided with screw plug; No. second one-way valve is made up of No. second valve seat and No. second cup head spool, and No. second one-way valve one end is communicated with the main valve plug control chamber, and No. second one-way valve one end is communicated with pilot valve control mouth No. three; No. second one-way valve one end is communicated with number one control mouthful, constitutes big flow, high-power, pilot valve proportional control flow, forward and reverse mobile high-volume hydraulic feedback guide and controls the plug-in type proportional throttle valve.
The working procedure of the utility model is following: when No. second control mouth do not have pressure; Pilot valve is in closed condition; Pressure oil gets into the main valve plug control chamber through the number one one-way valve, because the area of main valve plug control chamber is greater than the area of main valve filler opening, so main valve plug is in closed condition.When No. second control mouth had certain pressure, pilot valve overcame the power of Returnning spring under the effect of pressure; Make guide's spool move down certain distance, the pressure oil of main valve plug control chamber mouthful gets into No. three pilot valve control mouthful through the control of No. second pilot valve, when the pressure that is reduced to the main valve filler opening when pressure can be pushed main valve plug open; Pressure oil just gets into the main valve oil outlet; When the flow that gets into the main valve plug control chamber through elongated throttle orifice was identical with the flow that mouthful gets into No. three pilot valve control mouthful through No. second pilot valve control, main valve plug just was in state of equilibrium, when the pressure of No. second control mouthful continues to increase; Guide's spool continues to overcome the power of Returnning spring; Continuation is mobile, and the flow of controlling mouth through No. second pilot valve control mouthful No. three pilot valve of entering increases, and the pressure of main valve plug control chamber reduces; The opening of main valve plug just increases, and has just realized ratio throttling control flow rate; When No. second control mouth pressure reduces to zero suddenly, and the pressure of main valve oil outlet is when high, and guide's spool resets rapidly; The pressure oil of main valve oil outlet gets into the main valve plug control chamber through number one control mouth through No. second one-way valve, and main valve plug is closed rapidly; Can guarantee the Security operation of equipment like this, realize the unlatching of spool ratio, response rapidly; Closed safe is reliable, and the linearity is high, stagnates and encircles on the little hydraulic control system.
The effect that the utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve is simple in structure, instantaneous unlatching, proportional control; The spool realization is safe and reliable closes and opens; Adopt the hydraulic flow closed-loop feedback, the linearity is high, and the ring that stagnates is little; Control degree and reliability are high, are widely used on the hydraulic control system of engineering machinery, lathe, casting forging, die casting, metallurgy, boats and ships, mine industry.
Description of drawings
The utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve and will combine accompanying drawing to describe in further detail.
Fig. 1 is the structural representation that the utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve.
Fig. 2 is A-A section of structure that the utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve.
Fig. 3 is the hydraulic system structure schematic representation that the utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve.
1 - Main valve inlet 2 - Main valve sleeve 3 - Main valve outlet port? 4 - No. check valve 5 - main spool? 6 - elongated orifice? 7 - main valve control chamber? 8 - No. control port? 9 - No. check valve 10 - screw plug? 11 - No. seat? 12 - II Round Head spool? 13 - control cover? 14 - pilot? 15 - II control port? 16 - threaded sleeve? 17 - return spring? 18 - No. pilot valve control port? 19 - pilot valve cover 20 - pilot spool 21 - II pilot valve control port 22 - Third pilot valve control port? 23 - Fourth pilot valve control port? 24 - oil return port? 25 - No. semicircular head spool 26 - No. seat 27 - Cross-cutting slot.
Embodiment
With reference to Fig. 1, Fig. 2 and Fig. 3, the utility model high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve: it is made up of main valve housing 2, main valve plug 5, guide's valve pocket 19, guide's spool 20 and control cover plate 13, and the side of main valve housing 2 is provided with main valve filler opening 1 and main valve oil outlet 3; Device main valve plug 5 is provided with number one one-way valve 4 in main valve plug 5 axial bores in the axial bore of main valve housing 2, and number one one-way valve 4 is made up of number one valve seat 26 and number one cup head spool 25; Main valve plug 5 one ends are provided with cross throttling groove 27, and main valve plug 5 the other ends are provided with elongated throttle orifice 6, and elongated throttle orifice 6 one ends are communicated with number one one-way valve 4; Elongated throttle orifice 6 one ends are communicated with main valve plug control chamber 7; Control cover plate 13 is arranged on main valve housing 2 upper ends, and control cover plate 13 end face axial are provided with pilot valve 14, and pilot valve 14 is made up of guide's valve pocket 19, guide's spool 20 and swivel nut 16; Device guide spool 20 in guide's valve pocket 19 axial bores; Guide's valve pocket 19 1 ends are provided with swivel nut 16, install Returnning spring 17 between guide's spool 20 and the swivel nut 16, No. second control mouth 15 of number one pilot valve control mouthful 18 connections; No. second pilot valve control mouthful 21 connection main valve plug control chambers 7; No. three pilot valve control mouthful 22 connection number one controls mouthful 8, the No. four pilot valve control mouthful 23 connection return openings 24, control cover plate 13 side axial are provided with one-way valve 9 No. second; No. second one-way valve 9 one ends are provided with screw plug 10; No. second one-way valve 9 is made up of No. second valve seat 11 and No. second cup head spool 12, and No. second one-way valve 9 one ends are communicated with 7, No. the second one-way valve 9 one ends of main valve plug control chamber and are communicated with pilot valve control mouth 22 No. three; No. second one-way valve 9 one end are communicated with number one control mouthfuls 8, constitute big flow, high-power, pilot valve proportional control flow, forward and reverse mobile high-volume hydraulic feedback guide and control the plug-in type proportional throttle valve.
The utility model high-volume hydraulic feedback guide controls the embodiment of plug-in type proportional throttle valve; The working procedure of the utility model is following: when No. second control mouth 15 do not have pressure; Pilot valve 14 is in closed condition; Pressure oil gets into main valve plug control chamber 7 through number one one-way valve 4, because the area of main valve plug control chamber 7 is greater than the area of main valve filler opening 1, so main valve plug 5 is in closed condition.When No. second control mouth 15 had certain pressure, pilot valve 14 overcame the power of Returnning spring 17 under the effect of pressure; Make guide's spool 20 move down certain distance, the pressure oil of main valve plug control chamber 7 gets into No. three pilot valve control mouthfuls 22 through No. second pilot valve control mouthfuls 21, when the pressure that is reduced to main valve filler opening 1 when pressure can be pushed main valve plug 5 open; Pressure oil just gets into main valve oil outlet 3; When the flow that gets into main valve plug control chambers 7 through elongated throttle orifice 6 was identical with the flow that gets into No. three pilot valve control mouthfuls 22 through No. second pilot valve control mouthfuls 21, main valve plug 5 just was in state of equilibrium, when the pressure of No. second control mouthfuls 15 continues to increase; Guide's spool 20 continues to overcome the power of Returnning spring 17; Continuation is mobile, and the flow of controlling mouth 22 through No. second pilot valve control mouthful No. three pilot valve of 21 entering increases, and the pressure of main valve plug control chamber 7 reduces; The opening of main valve plug 5 just increases, and has just realized ratio throttling control flow rate; When No. second control mouthful 15 pressure reduce to zero suddenly, and the pressure of main valve oil outlet 3 is when high, and guide's spool 20 resets rapidly; The pressure oil of main valve oil outlet 3 gets into main valve plug control chambers 7 through number one control mouth 8 through No. second one-way valve 9, and main valve plug 5 is closed rapidly; Can guarantee the Security operation of equipment like this, realize the unlatching of spool ratio, response rapidly; Closed safe is reliable, and the linearity is high, stagnates and encircles on the little hydraulic control system.
Claims (1)
1. a high-volume hydraulic feedback guide controls the plug-in type proportional throttle valve; It is made up of main valve housing (2), main valve plug (5), guide's valve pocket (19), guide's spool (20) and control cover plate (13); The side that it is characterized in that main valve housing (2) is provided with main valve filler opening (1) and main valve oil outlet (3); Device main valve plug (5) is provided with number one one-way valve (4) in main valve plug (5) axial bore in the axial bore of main valve housing (2), and number one one-way valve (4) is made up of number one valve seat (26) and number one cup head spool (25); Main valve plug (5) one ends are provided with cross throttling groove (27); Main valve plug (5) the other end is provided with elongated throttle orifice (6), and elongated throttle orifice (6) one ends are communicated with number one one-way valve (4), and elongated throttle orifice (6) one ends are communicated with main valve plug control chamber (7); Control cover plate (13) is arranged on main valve housing (2) upper end; Control cover plate (13) end face axial is provided with pilot valve (14), and pilot valve (14) is made up of guide's valve pocket (19), guide's spool (20) and swivel nut (16), device guide's spool (20) in guide's valve pocket (19) axial bore; Guide's valve pocket (19) one ends are provided with swivel nut (16); Install Returnning spring (17) between guide's spool (20) and the swivel nut (16), number one pilot valve control mouthful (18) is communicated with No. second control mouthful (15), and No. second pilot valve control mouthful (21) is communicated with main valve plug control chamber (7); No. three pilot valve control mouthful (22) is communicated with number one control mouthful (8); No. four pilot valve control mouthful (23) is communicated with return opening (24), and control cover plate (13) side axial is provided with No. second one-way valve (9), and No. second one-way valve (9) one ends are provided with screw plug (10); No. second one-way valve (9) is made up of No. second valve seat (11) and No. second cup head spool (12); No. second one-way valve (9) one ends are communicated with main valve plug control chamber (7), and No. second one-way valve (9) one ends are communicated with No. three pilot valve control mouthful (22), and No. second one-way valve (9) one ends are communicated with number one control mouthful (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201846160U CN202108799U (en) | 2011-06-02 | 2011-06-02 | Large-flow hydraulic feedback pilot control cartridge proportional throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201846160U CN202108799U (en) | 2011-06-02 | 2011-06-02 | Large-flow hydraulic feedback pilot control cartridge proportional throttling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202108799U true CN202108799U (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201846160U Expired - Fee Related CN202108799U (en) | 2011-06-02 | 2011-06-02 | Large-flow hydraulic feedback pilot control cartridge proportional throttling valve |
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| Country | Link |
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| CN (1) | CN202108799U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162476A (en) * | 2011-06-02 | 2011-08-24 | 山东泰丰液压股份有限公司 | High-flow hydraulic feedback pilot control plug-type proportion throttle valve system |
| CN104595268A (en) * | 2014-12-02 | 2015-05-06 | 武汉船用机械有限责任公司 | Pilot type integrated hydraulic governor control valve |
| CN112412909A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | High-temperature and high-pressure resistant simulation load module |
-
2011
- 2011-06-02 CN CN2011201846160U patent/CN202108799U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162476A (en) * | 2011-06-02 | 2011-08-24 | 山东泰丰液压股份有限公司 | High-flow hydraulic feedback pilot control plug-type proportion throttle valve system |
| CN104595268A (en) * | 2014-12-02 | 2015-05-06 | 武汉船用机械有限责任公司 | Pilot type integrated hydraulic governor control valve |
| CN104595268B (en) * | 2014-12-02 | 2016-08-17 | 武汉船用机械有限责任公司 | A kind of pilot-operated type integrated hydraulic speed regulating control valve |
| CN112412909A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | High-temperature and high-pressure resistant simulation load module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20160602 |