CN203146469U - Pressure impact control valve for hydraulic system - Google Patents
Pressure impact control valve for hydraulic system Download PDFInfo
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- CN203146469U CN203146469U CN 201320156890 CN201320156890U CN203146469U CN 203146469 U CN203146469 U CN 203146469U CN 201320156890 CN201320156890 CN 201320156890 CN 201320156890 U CN201320156890 U CN 201320156890U CN 203146469 U CN203146469 U CN 203146469U
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- main valve
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- pilot
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Abstract
The utility model relates to a pressure impact control valve for a hydraulic system. According to the technical scheme, a main valve seat (2) is installed in a round hole formed in the inner side of the left end of a main valve body (1), a pressure regulating screw (7) is installed at the right end of the main valve body (1) through threads, the right end of an umbrella-shaped main valve core rod (5) is movably installed in a round hole of the pressure regulating screw (7) in a coaxial-line mode, a main valve core (4) is fixedly connected with the left end of the umbrella-shaped main valve core rod (5), a dish-shaped spring (20) is installed in the umbrella-shaped main valve core rod (5), a main valve control oil hole (21) and a main valve oil inlet hole (18) are communicated through an oil channel (19), a guide valve core (15) is installed in a guide valve body (16), and a guide valve first oil inlet hole (17), a guide valve second oil inlet hole (11) and a guide valve control oil hole (14) are formed in the guide valve body (16). The main valve oil inlet hole (18) is communicated with the guide valve control oil hole (14). The pressure impact control valve for the hydraulic system has the advantages of being simple in structure, large in pressure regulating range, high in precision, small in pressure oscillating, good in dynamic performance and high in reliability, and is suitable for being combined with a hydraulic cylinder and a hydraulic pump for use.
Description
Technical field
The utility model belongs to hydraulic system pressure control valve technical field.Especially relate to a kind of hydraulic system compression shock control valve.
Background technique
The pressure peak control valve is the critical elements of hydraulic system, when system pressure surpasses setting pressure, opens overflow, and the protection hydraulic system reduces to impact.The pressure controlled valve that hydraulic system adopts, require to have simple in structure, range of regulation is big, precision is high, the pressure runout is little, dynamic performance good and high reliability features.
What application was more at present is relief valve, common direct-acting overflow valve is by the pre compressed magnitude of adjusting pressuring handle adjusting color screw spring, change the spring pre-compression force, different instruction power is provided, represent the valve core movement of making a concerted effort to drive of hydraulic action and instruction power, regulate valve port opening, form overflow, such valve pressure is subjected to the excess flow variable effect big, and deviation is big; Pilot operated compound relief valve is when oil pressure during greater than the pilot valve command force, and pilot valve is opened, and under the decompression of tiny throttle orifice, the main valve plug two ends form pressure reduction, drive valve core movement, regulate valve port opening, form overflow.Such valve arrangement complexity, damping hole easily stops up, and contamination resistance is poor, and helical spring is yielding, fracture, and it is big to the service behaviour influence of valve to damage the back; Leading type overflow speed of response is slow, sensitivity is low; Because the helical spring vibration causes relief valve pressure runout big; Under heavy duty, high speed and reciprocating operating mode, when oil hydraulic cylinder commutates or stops, easily producing high-pressure peak, common separate unit relief valve can only be controlled a cavity pressure, can not satisfy working condition requirement.According to statistics, the fault of hydraulic system 50% causes owing to hydraulic control valve.
Summary of the invention
The utility model is intended to overcome above-mentioned technological deficiency, purpose provides a kind of hydraulic system compression shock control valve simple in structure, that range of regulation is big, precision is high, the pressure runout is little, dynamic performance good and reliability is high, and this pressure peak control valve is applicable to oil hydraulic cylinder and hydraulic pump combination and uses.
To achieve these goals, the technical solution adopted in the utility model is: described pressure peak control valve is made up of pilot valve and main valve.
Main valve comprises main valve body, main valve seat, main valve plug, umbrella shape main valve core bar, belleville spring, supporting ring, screw press and safety cover.The structure of main valve is: the inboard center of the left end of main valve body has the circular hole that the degree of depth equates with main valve seat thickness; main valve seat is housed in the circular hole; be installed in the right-hand member in the main valve body, screw press is threaded with main valve body the screw press coaxial line, and the main valve body right-hand member is equipped with safety cover.In the circular hole of the movable screw press of packing in the right-hand member coaxial line ground of umbrella shape main valve core bar, main valve plug is fixedlyed connected with the left end of umbrella shape main valve core bar, umbrella shape main valve core bar is equipped with 1 ~ 3 group of belleville spring, the belleville spring left side contacts with the umbrella shape boss right flank of umbrella shape main valve core bar, and the belleville spring right side contacts with supporting ring.
The main valve body bottom has the main valve oil drainage hole near the left end place, and the upper middle position place of main valve body has the main valve oil inlet hole, and the circular hole center that the left end inboard of main valve body is provided with has main valve control oilhole, and main valve control oilhole and main valve oil inlet hole are by the oil duct conducting; Main valve control oilhole communicates with valve seat through-hole, and valve seat through-hole is positioned at the center of main valve seat, main valve control oilhole diameter and valve seat through-hole equal diameters.
Pilot valve comprises pilot valve end cap, pilot valve valve body and pilot valve spool.The structure of pilot valve is: the pilot valve spool places in the pilot valve valve body, and pilot valve valve body left end center has pilot valve first oil inlet hole, and the center of pilot valve end cap has pilot valve second oil inlet hole, has pilot valve control oilhole under place, pilot valve valve axis neutral position.Pilot valve end cap and pilot valve valve body contacting point have first seal groove, and first seal groove is equipped with an O type rubber seal.
Pilot valve is installed on the main valve body, the top of main valve body has second seal groove, and second seal groove is equipped with the 2nd O type rubber seal, and the main valve oil inlet hole is positioned at the center of second seal groove, the main valve oil inlet hole communicates with pilot valve control oilhole, the equal diameters of main valve oil inlet hole and pilot valve control oilhole.
Described pilot valve valve body is the hollow cylinder of left end sealing, and the internal diameter of hollow cylinder is 9 ~ 14mm, and length is 25 ~ 36
Mm; The pilot valve spool is spherical, and diameter equates with the internal diameter of hollow cylinder.
The diameter of described pilot valve first oil inlet hole, pilot valve second oil inlet hole and pilot valve control oilhole is 6 ~ 10 mm, and pilot valve first oil inlet hole, pilot valve second oil inlet hole and the aperture of pilot valve control oilhole in pilot valve are processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
Described main valve body is the hollow cylinder of left end sealing, and the internal diameter of hollow cylinder is 18 ~ 22mm, and length is 80 ~ 100
Mm; The diameter of the main valve oil drainage hole of main valve body is 10 ~ 12mm.
Described valve seat through-hole diameter is 5 ~ 8mm, and the valve seat through-hole aperture that contacts with main valve plug is processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
Described main valve plug is spherical, and diameter is 8 ~ 12mm.
The diameter of described umbrella shape main valve core bar is 6 ~ 10mm, chrome-faced, and chromium coating thickness is 0.01 ~ 0.02mm.
Described disk spring is involutory and superimposed compound mode.
The thickness h of described supporting ring is 10 ~ 15mm, and interior circular diameter d is 10 ~ 14mm, and outside diameter D is 25 ~ 35mm; The cross section of supporting ring is the trapezoidal formation of two symmetries, and trapezoidal sharp angle is 30 ~ 35 °.
Described screw press is made of the square handle of right-hand member, cylindrical body and the middle round bar of left end, and middle round bar length is 30 ~ 40mm; Cylindrical left surface is processed with circular hole concentrically; Begin to be processed with outside thread from cylindrical left end, externally threaded length is 0.6 ~ 0.8 times of cylinder length, is processed with the 3rd seal groove at the place, neutral position of cylindrical body remaining part, and the 3rd seal groove is equipped with the 3rd O type rubber seal.
Owing to adopted technique scheme, the utility model compared with prior art has following good effect:
1, the utility model adopts pilot valve and main valve composite structure, pilot valve first oil inlet hole connects the working connection of hydraulic system, pilot valve second oil inlet hole connects another working connection of hydraulic system, main valve oil drainage hole connected tank, pilot valve is automatically guided to the front end of main valve plug with the high pressure oil in the working connection through passage, and when hydraulic action during greater than belleville spring power, main valve plug is opened, when hydraulic action during less than belleville spring power, the opening between main valve seat and main valve plug is closed; Control the hydraulic fluid pressure peak value by the precompression of regulating belleville spring, the utility model can be controlled the pressure peak of two working connections under high pressure conditions simultaneously, and is simple in structure.
2, the utility model adopts belleville spring that command force is provided, and the belleville spring installation footprint is little, is used in combination conveniently, adopts different quantity and compound mode, can obtain becoming stiffness characteristics and straight line type spring force characteristic curve, the big and precision height of regulation range.
3, adopt the belleville spring of superimposed compound mode in the utility model, can form damping between the belleville spring, reduced the pressure runout of pressure peak control valve, improved dynamic performance.
4, main valve plug front end of the present utility model is not established throttling pore, has improved contamination resistance, and belleville spring long service life, not fragile, so the reliability height.
Therefore, the utlity model has advantage simple in structure, that range of regulation is big, precision is high, the pressure runout is little, dynamic performance good and reliability is high, be applicable to oil hydraulic cylinder and hydraulic pump combination and use.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is the sectional view of supporting ring 6 among Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model being further described, is not the restriction to protection domain.
Embodiment 1
A kind of hydraulic system compression shock control valve.This pressure peak control valve is made up of pilot valve and main valve as shown in Figure 1.
Main valve comprises main valve body 1, main valve seat 2, main valve plug 4, umbrella shape main valve core bar 5, belleville spring 20, supporting ring 6, screw press 7 and safety cover 9.The structure of main valve is: the inboard center of the left end of main valve body 1 has the circular hole that the degree of depth equates with main valve seat 2 thickness; main valve seat 2 is housed in the circular hole; be installed in the right-hand member in the main valve body 1, screw press 7 is threaded with main valve body 1 screw press 7 coaxial lines, and main valve body 1 right-hand member is equipped with safety cover 9.In the circular hole of the movable screw press 7 of packing in the right-hand member coaxial line ground of umbrella shape main valve core bar 5, main valve plug 4 is fixedlyed connected with the left end of umbrella shape main valve core bar 5, umbrella shape main valve core bar 5 is equipped with 1 group of belleville spring 20, belleville spring 20 left sides contact with the umbrella shape boss right flank of umbrella shape main valve core bar 5, and belleville spring 20 right sides contact with supporting ring 6.
Main valve body 1 bottom has main valve oil drainage hole 3 near the left end place, the upper middle position place of main valve body 1 has main valve oil inlet hole 18, the circular hole center that the left end inboard of main valve body 1 is provided with has main valve control oilhole 21, main valve control oilhole 21 and main valve oil inlet hole 18 are by oil duct 19 conductings, main valve control oilhole 21 communicates with valve seat through-hole 22, valve seat through-hole 22 is positioned at the center of main valve seat 2, main valve control oilhole 21 diameters and valve seat through-hole 22 equal diameters.
Pilot valve comprises pilot valve end cap 12, pilot valve valve body 16 and pilot valve spool 15.The structure of pilot valve is: pilot valve spool 15 places in the pilot valve valve body 16, pilot valve valve body 16 left end centers have pilot valve first oil inlet hole 17, the center of pilot valve end cap 12 has pilot valve second oil inlet hole 11, has pilot valve control oilhole 14 under place, pilot valve valve body 16 axis neutral positions.Pilot valve end cap 12 has first seal groove with pilot valve valve body 16 contacting points, and first seal groove is equipped with an O type rubber seal 10.
Pilot valve is installed on the main valve body 1, the top of main valve body 1 has second seal groove, second seal groove is equipped with the 2nd O type rubber seal 13, main valve oil inlet hole 18 is positioned at the center of second seal groove, main valve oil inlet hole 18 communicates with pilot valve control oilhole 14, the equal diameters of main valve oil inlet hole 18 and pilot valve control oilhole 14.
The described pilot valve valve body 16 of present embodiment is the hollow cylinder of left end sealing, and the internal diameter of hollow cylinder is 9 ~ 12mm, and length is 25 ~ 30mm, and pilot valve spool 15 is spherical, and diameter equates with the internal diameter of hollow cylinder.
The diameter of described pilot valve first oil inlet hole 17 of present embodiment, pilot valve second oil inlet hole 11 and pilot valve control oilhole 14 is 6 ~ 8 mm, pilot valve first oil inlet hole 17, pilot valve second oil inlet hole 11 and the aperture of pilot valve control oilhole 14 in pilot valve are processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
The described main valve body 1 of present embodiment is the hollow cylinder of left end sealing, and the internal diameter of hollow cylinder is 18 ~ 20mm, and length is 80 ~ 90mm; The diameter of the main valve oil drainage hole 3 of main valve body 1 is 10 ~ 12mm.
The diameter of the described valve seat through-hole 22 of present embodiment is 5 ~ 7mm, and valve seat through-hole 22 apertures that contact with main valve plug 4 are processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
The described main valve plug 4 of present embodiment is spherical, and diameter is 8 ~ 10mm.
The diameter of the described umbrella shape main valve of present embodiment core bar 5 is 6 ~ 8mm, chrome-faced, and chromium coating thickness is 0.01 ~ 0.02mm.
The described disk spring 20 of present embodiment is involutory and superimposed compound mode.
The described supporting ring 6 of present embodiment as shown in Figure 2, thickness h is 10 ~ 15mm, interior circular diameter d is 10 ~ 14mm, outside diameter D is 25 ~ 35mm; The cross section of supporting ring 6 is the trapezoidal formation of two symmetries, and trapezoidal sharp angle is 30 ~ 35 °.
The described screw press 7 of present embodiment is made of the square handle of right-hand member, cylindrical body and the middle round bar of left end as shown in Figure 1, and middle round bar length is 30 ~ 40mm; Cylindrical left surface is processed with circular hole concentrically; Begin to be processed with outside thread from cylindrical left end, externally threaded length is 0.6 ~ 0.8 times of cylinder length, is processed with the 3rd seal groove at the place, neutral position of cylindrical body remaining part, and the 3rd seal groove is equipped with the 3rd O type rubber seal 8.
Embodiment 2
A kind of hydraulic system compression shock control valve.Except following technical parameter, all the other are with embodiment 1.
Umbrella shape main valve core bar 5 is equipped with 2 ~ 3 groups of belleville springs 20;
The internal diameter of the hollow cylinder of pilot valve valve body 16 is 11 ~ 14mm, and length is 30 ~ 36mm;
The diameter of pilot valve first oil inlet hole 17, pilot valve second oil inlet hole 11 and pilot valve control oilhole 14 is 8 ~ 10 mm;
The internal diameter of the hollow cylinder of main valve body 1 is 20 ~ 22mm, and length is 90 ~ 100mm;
The diameter of valve seat through-hole 22 is 7 ~ 8mm;
The diameter of main valve plug 4 is 10 ~ 12mm;
The diameter of umbrella shape main valve core bar 5 is 8 ~ 10mm.
This embodiment compared with prior art has following good effect:
1, this embodiment adopts pilot valve and main valve composite structure, pilot valve first oil inlet hole 17 connects the working connection of hydraulic system, pilot valve second oil inlet hole 11 connects another working connection of hydraulic system, main valve oil drainage hole 3 connected tanks, pilot valve is automatically guided to the front end of main valve plug 4 with the high pressure oil in the working connection through passage 19, and when hydraulic action during greater than belleville spring power, main valve plug 4 is opened, when hydraulic action during less than belleville spring power, the opening that main valve seat 2 and main valve plug are 4 is closed; Control the hydraulic fluid pressure peak value by the precompression of regulating belleville spring 20, this embodiment can be controlled the pressure peak of two working connections under high pressure conditions simultaneously, and is simple in structure.
2, this embodiment adopts belleville spring 20 that command force is provided, belleville spring 20 installation footprints are little, are used in combination conveniently, adopt different quantity and compound mode, can obtain becoming stiffness characteristics and straight line type spring force characteristic curve, the big and precision height of regulation range.
3, adopt the belleville spring 20 of superimposed compound mode in this embodiment, can form damping between the belleville spring 20, reduced the pressure runout of pressure peak control valve, improved dynamic performance.
4, main valve plug 4 front ends of this embodiment are not established throttling pore, have improved contamination resistance, and belleville spring 20 long service life, not fragile, so the reliability height.
Therefore, the advantage that this specific embodiment has is simple in structure, range of regulation is big, precision is high, the pressure runout is little, dynamic performance good and reliability is high is applicable to and oil hydraulic cylinder and hydraulic pump combination are used.
Claims (10)
1. hydraulic system compression shock control valve is characterized in that described pressure peak control valve is made up of pilot valve and main valve;
Main valve comprises main valve body (1), main valve seat (2), main valve plug (4), umbrella shape main valve core bar (5), belleville spring (20), supporting ring (6), screw press (7) and safety cover (9); The structure of main valve is: the inboard center of the left end of main valve body (1) has the circular hole that the degree of depth equates with main valve seat (2) thickness, main valve seat (2) is housed in the circular hole, be installed in the right-hand member in the main valve body (1) screw press (7) coaxial line, screw press (7) is threaded with main valve body (1), and main valve body (1) right-hand member is equipped with safety cover (9); The right-hand member coaxial line of umbrella shape main valve core bar (5) is packed in the circular hole of screw press (7) versatilely, main valve plug (4) is fixedlyed connected with the left end of umbrella shape main valve core bar (5), umbrella shape main valve core bar (5) is equipped with 1 ~ 3 group of belleville spring (20), belleville spring (20) left side contacts with the umbrella shape boss right flank of umbrella shape main valve core bar (5), and belleville spring (20) right side contacts with supporting ring (6);
Main valve body (1) bottom has main valve oil drainage hole (3) near the left end place, the upper middle position place of main valve body (1) has main valve oil inlet hole (18), the circular hole center that the left end inboard of main valve body (1) is provided with has main valve control oilhole (21), main valve control oilhole (21) and main valve oil inlet hole (18) are by oil duct (19) conducting, main valve control oilhole (21) communicates with valve seat through-hole (22), valve seat through-hole (22) is positioned at the center of main valve seat (2), main valve control oilhole (21) diameter and valve seat through-hole (22) equal diameters;
Pilot valve comprises pilot valve end cap (12), pilot valve valve body (16) and pilot valve spool (15); The structure of pilot valve is: pilot valve spool (15) places in the pilot valve valve body (16), pilot valve valve body (16) left end center has pilot valve first oil inlet hole (17), the center of pilot valve end cap (12) has pilot valve second oil inlet hole (11), has pilot valve control oilhole (14) under place, pilot valve valve body (16) axis neutral position; Pilot valve end cap (12) has first seal groove with pilot valve valve body (16) contacting point, and first seal groove is equipped with an O type rubber seal (10);
Pilot valve is installed on the main valve body (1), the top of main valve body (1) has second seal groove, second seal groove is equipped with the 2nd O type rubber seal (13), main valve oil inlet hole (18) is positioned at the center of second seal groove, main valve oil inlet hole (18) communicates with pilot valve control oilhole (14), the equal diameters of main valve oil inlet hole (18) and pilot valve control oilhole (14).
2. hydraulic system according to claim 1 compression shock control valve, it is characterized in that described pilot valve valve body (16) is the hollow cylinder of left end sealing, the internal diameter of hollow cylinder is 9 ~ 14mm, length is 25 ~ 36mm, pilot valve spool (15) is spherical, and diameter equates with the internal diameter of hollow cylinder.
3. hydraulic system according to claim 1 compression shock control valve, the diameter that it is characterized in that described pilot valve first oil inlet hole (17), pilot valve second oil inlet hole (11) and pilot valve control oilhole (14) is 6 ~ 10 mm, pilot valve first oil inlet hole (17), pilot valve second oil inlet hole (11) and the aperture of pilot valve control oilhole (14) in pilot valve are processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
4. hydraulic system according to claim 1 compression shock control valve is characterized in that described main valve body (1) is left end
The hollow cylinder of sealing, the internal diameter of hollow cylinder is 18 ~ 22mm, length is 80 ~ 100mm; The diameter of the main valve oil drainage hole (3) of main valve body (1) is 10 ~ 12mm.
5. hydraulic system according to claim 1 compression shock control valve is characterized in that described valve seat through-hole (22) diameter is 5 ~ 8mm, and valve seat through-hole (22) aperture that contacts with main valve plug (4) is processed with 45 ° chamfering, and the degree of depth is 1 ~ 2mm.
6. hydraulic system according to claim 1 compression shock control valve is characterized in that described main valve plug (4) for spherical, and diameter is 8 ~ 12mm.
7. hydraulic system according to claim 1 compression shock control valve, the diameter that it is characterized in that described umbrella shape main valve core bar (5) is 6 ~ 10mm, chrome-faced, chromium coating thickness is 0.01 ~ 0.02mm.
8. hydraulic system according to claim 1 compression shock control valve is characterized in that described belleville spring (20) is involutory and superimposed compound mode.
9. hydraulic system according to claim 1 compression shock control valve, the thickness h that it is characterized in that described supporting ring (6) is 10 ~ 15mm, and interior circular diameter d is 10 ~ 14mm, and outside diameter D is 25 ~ 35mm; The cross section of supporting ring (6) is the trapezoidal formation of two symmetries, and trapezoidal sharp angle is 30 ~ 35 °.
10. hydraulic system according to claim 1 compression shock control valve is characterized in that described screw press (7) is made of the square handle of right-hand member, cylindrical body and the middle round bar of left end, and middle round bar length is 30 ~ 40mm; Cylindrical left surface is processed with circular hole concentrically, begin to be processed with outside thread from cylindrical left end, externally threaded length is 0.6 ~ 0.8 times of cylinder length, place, neutral position at the cylindrical body remaining part is processed with the 3rd seal groove, and the 3rd seal groove is equipped with the 3rd O type rubber seal (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156890 CN203146469U (en) | 2013-04-01 | 2013-04-01 | Pressure impact control valve for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156890 CN203146469U (en) | 2013-04-01 | 2013-04-01 | Pressure impact control valve for hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146469U true CN203146469U (en) | 2013-08-21 |
Family
ID=48973995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320156890 Expired - Fee Related CN203146469U (en) | 2013-04-01 | 2013-04-01 | Pressure impact control valve for hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161781A (en) * | 2013-04-01 | 2013-06-19 | 武汉科技大学 | Pressure peak control valve used for hydraulic system |
-
2013
- 2013-04-01 CN CN 201320156890 patent/CN203146469U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161781A (en) * | 2013-04-01 | 2013-06-19 | 武汉科技大学 | Pressure peak control valve used for hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20140401 |