CN1114765C - Generalized PCD digital hydraulic valve - Google Patents
Generalized PCD digital hydraulic valve Download PDFInfo
- Publication number
- CN1114765C CN1114765C CN 00105285 CN00105285A CN1114765C CN 1114765 C CN1114765 C CN 1114765C CN 00105285 CN00105285 CN 00105285 CN 00105285 A CN00105285 A CN 00105285A CN 1114765 C CN1114765 C CN 1114765C
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- flow control
- valve
- valve body
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- passage
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Abstract
The present invention relates to generalized PCM hydraulic digital valve. A reversal valve and two sets of flow control valves are arranged in a valve body, wherein each set of flow control valves has a plurality of flow control valves with the same structure; the valve body of each flow control valve is respectively provided with thin-walled throttling holes with different sizes; the throttling area uses linear binary codes between valves in low positions, and uses non-linear codes between valves in high positions; a valve core is driven by ordinary switching electromagnets, and are just in a turning on state and a turning off state. The flow quantity and the flow direction are controlled by controlling the combined state of turning on and off each electromagnet. The resolution and the maximum flow quality of the valves can be set according to the requirements. The present invention has the advantages of high reliability, broad speed regulating range, insensitivity of medium pollution, and simple structure.
Description
Technical field
The present invention relates to gate valve or guiding valve, is a kind of when valve events, changes the device of flow in the path.
Background technique
In the background technique field, with the present invention the most approaching be servovalve or Proportional valve, servovalve or Proportional valve are analog valves, although present technology comparative maturity, but because servovalve or Proportional valve complex structure, the machining accuracy height of spool and valve pocket, and need drive unit such as high-performance electromagnet, so the price height, contamination resistance is poor.And big flow servovalve and Proportional valve price are very expensive, and this uses general engineering is non-remunerative, especially to the high-volume hydraulic control system.
The objective of the invention is to design a kind of size and Orientation that can control fluid, speed-regulating range width, the generalized PCD digital hydraulic valve that contamination resistance is strong.
Summary of the invention
In order to achieve the above object, the technical solution used in the present invention is that it comprises:
Changeover valve core is housed in valve body, the two ends of changeover valve core link to each other through the switch electromagnet of changeover valve core spring with the driving changeover valve core that is contained in the valve body both sides respectively, have the passage that is communicated with high pressure oil on the corresponding valve body of changeover valve core, two passages that are communicated with oil hydraulic cylinder, two passages that can be respectively be communicated with the throttle orifice of two groups of flow control valves on the valve body, two passages that are communicated with throttle orifice are by another channel connection;
Two groups of flow control valves also are housed in valve body, every group has 3 flow control valves that structure is identical, one end of flow control spool is equipped with the flow control spool spring with the snap ring location, the other end of flow control spool links to each other with the switch electromagnet of the driving flow control spool that is contained in the valve body side, have on the flow control spool cylndrical surface annular pass and with the center spool channel connection, two groups of flow controllers with different big or small thin-walled throttle hole area are screwed into respectively on the valve body by screw thread, two groups of throttle orifices respectively with valve body on two channel connections.
The advantage that the present invention has is: two states is only opened and closed to spool by the regular tap solenoid actuated.Realize the control of flow size and Orientation by the switch combination state of controlling each electromagnet, the resolution of valve and peak rate of flow can be set up as required.Owing to adopted switch control, so its reliability height, speed-regulating range width, insensitive to medium pollution, and simple in structure, easy processing, cost are low, do not need A/D converter, can directly realize digital control.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the hydraulic servo control system principle schematic of the present invention and composition thereof.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.As shown in Figure 1 and Figure 2, the present invention includes: changeover valve core 3 is housed in valve body 1, the two ends of changeover valve core 3 link to each other through the switch electromagnet 4 of changeover valve core spring 2 with the driving changeover valve core that is contained in valve body 1 both sides respectively, have the passage P that is communicated with high pressure oil on the changeover valve core 3 corresponding valve bodies 1, two passage A, B being communicated with oil hydraulic cylinder, the channel C, the D that can be respectively be communicated with the throttle orifice of two groups of flow control valves on the valve body 1, two channel C that are communicated with throttle orifice, D are communicated with by passage E.Two groups of flow control valves also are housed in valve body 1, every group has 3 flow control valves that structure is identical, one end of flow control spool 7 is equipped with the flow control spool spring 5 with snap ring 6 location, the other end of flow control spool 7 links to each other with the switch electromagnet 8 of the driving flow control spool that is contained in valve body 1 side, have annular pass F on flow control spool 7 cylndrical surface and be communicated with center spool passage G, one group of flow controller 9 with different big or small thin-walled throttle hole area, 10,11 and another the group flow controller 12,13,14 are screwed on the valve body 1 by screw thread respectively, and two groups of throttle orifices are communicated with channel C and passage D in the valve body 1 respectively.
Different its throttle hole area of big or small thin-walled throttle orifice adopt linearity and non-uniform encoding, promptly adopt linear binary coding between the low level valve, adopt non-uniform encoding between high-order valve.
The moving direction of valve V control oil hydraulic cylinder, the discharge flow rate of valve V0～V5 and corresponding orifices controls oil hydraulic cylinder thereof.The on off state of valve V0～V5 decides according to hydraulic cylinder piston and target location.Be provided with the throttle orifice of different sizes in the valve of the present invention, each throttle hole area does not become the multiple relation, and it adopts linearity and non-uniform encoding, and promptly the area relationship between the low level valve becomes the multiple relation, as binary coding; Area between the high-order valve does not become the multiple relation, as the quaternary or octal system.Such as adopting six flow control valves that structure is identical, S0: S1: S2: S3: S4: S5=2 among the figure
0: 2
1: 2
2: 2
3: 2
5: 2
8The orifice size of such broad sense PCM Pulse Code Modulation valve maximum is 303S0, and the control flow rate scope is big.
Working principle of the present invention is: when switch electromagnet above driving changeover valve core 34 is charged, changeover valve core 3 moves down, passage P and passage A connect, channel B and passage D connect, high pressure oil flows to passage A from passage P and enters oil hydraulic cylinder, the oil that oil hydraulic cylinder is discharged arrives passage D through channel B, hole E communication passage C and passage D, the oil that oil hydraulic cylinder is discharged through channel C or passage D to flow controller 9 with thin-walled aperture, if drive the switch electromagnet 8 of flow control spool of a certain position when charged, then the annular pass F of flow control spool 7 communicates with C or D through this throttle orifice, otherwise this level control valve core closing passage F and channel C or D, make passage F and channel C or D obstructed, the oil that flows through throttle orifice is through passage F, passage G, passage H and passage T flow back to fuel tank.Move when driving on the changeover valve core 3, passage P and channel B are connected, and passage A and channel C are connected.High pressure oil flows to channel B from passage P and enters oil hydraulic cylinder, the oil that oil hydraulic cylinder is discharged through passage A to channel C, the flow controller 9 of oil that flows out from channel C or passage D through having the thin-walled aperture to the process of fuel tank with above identical.When the switch electromagnet 4 that drives selector valve was not charged, changeover valve core 3 was in meta under the effect of spring, and passage P, passage A, channel B, channel C or D are not connected, the oil hydraulic cylinder stop motion.
Claims (2)
1. generalized PCD digital hydraulic valve is characterized in that it comprises:
1) changeover valve core [3] is housed in valve body [1], the two ends of changeover valve core [3] link to each other through the switch electromagnet [4] of changeover valve core spring [2] with the driving changeover valve core that is contained in valve body [1] both sides respectively, have the passage [P] that is communicated with high pressure oil on the corresponding valve body of changeover valve core [3] [1], two passages [A], [B] that are communicated with oil hydraulic cylinder, two passages [C], [D] that can be communicated with the throttle orifice of the last two groups of flow control valves of valve body [1] respectively, two passages that are communicated with throttle orifice [C], [D] are communicated with by another passage [E];
2) two groups of flow control valves also are housed in valve body [1], every group has 3 flow control valves that structure is identical, one end of flow control spool [7] is equipped with the flow control spool spring [5] with snap ring [6] location, the other end of flow control spool [7] links to each other with the switch electromagnet [8] of the driving flow control spool that is contained in valve body [1] side, have annular pass [F] on flow control spool [7] cylndrical surface and be communicated with center spool passage [G], two groups of flow controllers with different big or small thin-walled throttle hole area are screwed into respectively on the valve body [1] by screw thread, and two groups of throttle orifices are communicated with two passages [C] or [D] in the valve body [1] respectively.
2. generalized PCD digital hydraulic valve according to claim 1, it is characterized in that: its throttle hole area of different big or small thin-walled throttle orifices adopts linearity and non-uniform encoding, promptly between the low level valve, adopt linear binary coding, between high-order valve, adopt non-uniform encoding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105285 CN1114765C (en) | 2000-04-19 | 2000-04-19 | Generalized PCD digital hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105285 CN1114765C (en) | 2000-04-19 | 2000-04-19 | Generalized PCD digital hydraulic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266953A CN1266953A (en) | 2000-09-20 |
| CN1114765C true CN1114765C (en) | 2003-07-16 |
Family
ID=4577659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00105285 Expired - Fee Related CN1114765C (en) | 2000-04-19 | 2000-04-19 | Generalized PCD digital hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1114765C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437408C (en) * | 2006-01-19 | 2008-11-26 | 北京化工大学 | Flow control system and control method in mixed mode of pulse code modulation and pulse width modulation |
| CN102890513B (en) * | 2012-10-11 | 2015-08-19 | 曹兵 | Digital differential control system for gas-liquid flow |
-
2000
- 2000-04-19 CN CN 00105285 patent/CN1114765C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1266953A (en) | 2000-09-20 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |