CN203463397U - Reversing valve component and hydraulic system comprising same - Google Patents
Reversing valve component and hydraulic system comprising same Download PDFInfo
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- CN203463397U CN203463397U CN201320512650.5U CN201320512650U CN203463397U CN 203463397 U CN203463397 U CN 203463397U CN 201320512650 U CN201320512650 U CN 201320512650U CN 203463397 U CN203463397 U CN 203463397U
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- valve
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- control valve
- mouthful
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Abstract
The utility model discloses a reversing valve component, which comprises a reversing valve (30) and a control valve (40); the reversing valve (30) comprises a valve body (31) and a valve plug (32); the valve body (31) is provided with a control port (X2); the valve plug (32) is movably arranged in the valve body (31); the reversing valve component is characterized in that the control valve (40) comprises a valve body (41); the valve body (41) comprises an oil inlet (51), an oil return opening (52) and an oil passage (53); the oil inlet (51) is provided with an oil inlet damping device (55); the oil return opening (52) is communicated with the oil inlet (51); the oil inlet (51) and the control port (X2) is communicated by virtue of the oil passage (53) which can be partially blocked. The utility model further provides a hydraulic system which comprises the reversing valve component. According to the technical scheme, when the reversing valve acts, the hydraulic impact can be reduced, and an ideal response speed can be obtained.
Description
Technical field
The utility model relates to Hydraulic Field, particularly, relates to a kind of reversing valve assembly and the hydraulic system that comprises this reversing valve assembly.
Background technique
When hydraulic system is when for example starting suddenly, commutating, due to jerking of hydrovalve, tend to cause the higher pressure of the instantaneous appearance of internal system, thereby each hydraulic element in system are caused to hydraulic shock.
Be illustrated in figure 1 a kind of hydraulic system, this hydraulic system comprises oil hydraulic pump 10, main control valve 11, executive component 12 and has the selector valve 13 of controlling mouthful X1, oil hydraulic pump 10 is connected with executive component 12 by main control valve 11, main control valve 11 is connected with executive component 12 with the second oil circuit 22 by the first oil circuit 21 respectively, and selector valve 13 is connected in the second oil circuit 22 and the control mouth X1 of selector valve 13 communicates with the first oil circuit 21.
While making pressure hydraulic oil flow through the second oil circuit 22 when main control valve 11 actions, pressure hydraulic oil flows to executive component 12 through selector valve 13, and then by the first oil circuit 21 oil returns.While making pressure hydraulic oil flow through the first oil circuit 21 when main control valve 11 actions, pressure hydraulic oil also acts on the control mouth X1 of selector valve 13 simultaneously, thereby makes selector valve 13 actions, thereby pressure hydraulic oil passes through selector valve 13 oil returns after executive component 12.
When main control valve 13 has just moved and has made pressure hydraulic oil flow through the first oil circuit 21, the control mouth X1 of selector valve 13 impact of hydraulic oil that is also under pressure, thus cause the action of selector valve 13 steady not, and then hydraulic system is impacted.
In order to reduce hydraulic shock, conventionally adopt the mode that damping is set to realize traditionally.For example, for above-mentioned selector valve 13, for shock absorbing, conventionally at a control mouthful X1 place, damping is set.Like this, when system pressure hydraulic oil acts on the spool of selector valve 13 by controlling a mouthful X1, the impact that spool is subject to will be minimized.Yet this set but can cause the slow of spool action, thereby affect the speed of response of selector valve 13.
Therefore,, for selector valve 13, how can either reduce hydraulic shock and can obtain again desirable speed of response and become the technical issues that need to address.
Model utility content
The purpose of this utility model is to provide a kind of reversing valve assembly and comprises the hydraulic system of this reversing valve assembly, and this reversing valve assembly can reduce hydraulic shock and have desirable speed of response when action.
To achieve these goals, the utility model provides a kind of reversing valve assembly, this reversing valve assembly comprises selector valve and control valve, described selector valve comprises having to be controlled the valve body of mouth and is arranged on movably the spool in described valve body, described control valve comprises valve body, and this valve body comprises oiler, the return opening being communicated with this oiler being provided with into oil damping and is communicated with described oiler and the oil duct that can partly end of control mouth.
Preferably, described return opening is provided with oil return damping.
Preferably, the valve body of described control valve has the first valve pocket that communicates with described oiler and return opening and lead to described control mouth, described control valve also comprises: seal bar, the first end of sealing bar is fixed on the valve body of described control valve, and second end contrary with described first end extends and have a sealed department towards described control mouth in described the first valve pocket; Allow fluid only to flow to the described unidirectional valve pocket of controlling mouth, this unidirectional valve pocket is arranged on movably in described the first valve pocket and with the sidewall of described the first valve pocket and keeps sealing, described second end of described seal bar is positioned at described unidirectional valve pocket, and described one-way valve cover has the auxiliary section that can coordinate with described sealed department; And Returnning spring, this Returnning spring is pressed between the valve interior wall of described control valve and described unidirectional valve pocket and described unidirectional valve pocket is applied the active force of controlling mouthful towards described; Described oil duct comprise flow area constant part and depend on described seal bar and unidirectional valve pocket between the flow area variable part of relative position.
Preferably, the constant portion of described flow area comprises the passage that is positioned at the valve body of described control valve and is communicated with described oiler and controls mouthful, is provided with the first damping in this passage; The flow area constant part of described oil duct comprises the passage that is arranged on described seal bar inside; Or the flow area constant part of described oil duct comprises and is arranged on cracking or recess of the sealed department of described seal bar and/or the auxiliary section of described unidirectional valve pocket place.
Preferably, described seal bar comprises: threaded piece, and this threaded piece is connected with the valve body screw thread of described control valve; And rod member, this rod member inserts in described threaded piece and with this threaded piece and is fixedly connected with, and described sealed department is positioned on this rod member.
According on the other hand of the present utility model, a kind of hydraulic system is also provided, this hydraulic system comprises: oil hydraulic pump, main control valve, executive component and reversing valve assembly provided by the utility model, described oil hydraulic pump is connected with described executive component by described main control valve, described main control valve is connected with described executive component with the second oil circuit by the first oil circuit respectively, and the selector valve of described reversing valve assembly is connected in described the second oil circuit and the oiler of described control valve communicates with described the first oil circuit 21.
By technique scheme, utilize into oil damping and can bring into play the effect that buffering hydraulic impacts.Simultaneously, when the spool of selector valve starts to move, larger owing to leading to the flow area of the oil duct of controlling mouthful, thereby can allow the spool of selector valve to start fast to pass through " dead band ", owing to still allowing high pressure liquid force feed to flow to, control mouth subsequently, thereby it is mobile that spool can be continued comparatively reposefully.Therefore, when selector valve moves, can either reduce hydraulic shock and can obtain desirable speed of response again, thereby realize the purpose of this utility model.
Other feature and advantage of the present utility model partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of traditional hydraulic system;
Fig. 2 is according to the schematic diagram of a kind of mode of execution of reversing valve assembly provided by the utility model;
Fig. 3 is the structural representation of the reversing valve assembly shown in Fig. 2;
Fig. 4 be in the reversing valve assembly shown in Fig. 3 when flow area variable part ends completely the structural representation of state;
Fig. 5 is the schematic diagram when sealed department of seal bar and the auxiliary section of unidirectional valve pocket seal completely in the reversing valve assembly shown in Fig. 4;
Fig. 6 to Fig. 8 is for representing the structural representation of the different mode of executions of flow area constant part;
Fig. 9 is for representing the schematic diagram of the another kind of mode of execution of reversing valve assembly provided by the utility model;
Figure 10 is for representing the schematic diagram of a kind of mode of execution of hydraulic system provided by the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
The utility model provides a kind of reversing valve assembly, as shown in the figure, this reversing valve assembly comprises selector valve 30 and control valve 40, selector valve 30 comprises having to be controlled the valve body 31 of mouthful X2 and is arranged on movably the spool 32 in valve body 31, control valve 40 comprises valve body 41, and this valve body 41 comprises the oiler 51 being provided with into oil damping 55, the return opening 52 being communicated with this oiler 51 and is communicated with oiler 51 and the oil duct that can partly end 53 of control mouthful X2.
The oiler 51 of control valve 40 is provided with into oil damping 55, therefore, when having high pressure liquid force feed to flow to the control mouth X2 of selector valve 30 through the oiler of control valve 40, utilizes the damping function into oil damping 55, thereby plays the effect that buffering hydraulic impacts.Simultaneously, control valve 40 has the return opening 52 being communicated with oiler 51, therefore in actual use, utilizes into oil damping 55 and can play dividing potential drop effect, thereby reduce the oil liquid pressure at the control mouth X2 place of selector valve 30, bring into play too the effect that buffering hydraulic impacts.
In addition, control valve 40 also comprises the oil duct that can partly end 53 that is communicated with oiler 51 and controls mouthful X2.Oil duct 53 is part cut-off, and regardless of the working state of control valve 40, oil duct 53 still remains with part flow area, thereby allow high pressure liquid force feed to flow to, controls a mouthful X2.Thereby when spool 32 starts to move, because the flow area of oil duct 53 is larger, thereby can allow spool 32 to start fast to pass through " dead band ", although the flow area of oil duct 53 diminishes gradually subsequently, but control a mouthful X2 owing to still allowing high pressure liquid force feed to flow to, thereby spool 32 can be moved lentamente after starting action, spool 32 can be moved comparatively reposefully.
Therefore, utilize reversing valve assembly provided by the utility model, can obtain desirable actual effect reducing aspect the desirable speed of response of hydraulic shock and acquisition, and then realize the purpose of this utility model.
Preferably, in order to obtain the effect that buffering hydraulic impacts better, as shown in Figure 1, return opening 52 is provided with oil return damping 57.Utilize this oil return damping 57 can realize the effect of dividing potential drop equally, thereby make the oil liquid pressure at control mouth X2 place of selector valve 30 in rational level.
The first valve pocket 43 of valve body 41 is communicated with oiler 51, return opening 52 and a control mouthful X2, and oiler 51 allows high pressure liquid force feeds to enter in the first valve pocket 43, and then by return opening 52 oil returns, also can control a mouthful X2 by the flow direction, to control the action of selector valve 30.
Specifically, the first end 431(of seal bar 43 such as by interference fit, the mode such as be threaded) be fixed on the valve body 41 of control valve 40, second end 432 contrary with first end 431 extends and has a sealed department 433 towards controlling a mouthful X2 in the first valve pocket 42.
The second end 432 of seal bar 43 is positioned at unidirectional valve pocket 44, unidirectional valve pocket 44 has the auxiliary section 441 that can coordinate with sealed department 433, this auxiliary section 441 cooperatively interacts with the sealed department 433 of seal bar 43, thereby makes fluid only from the first valve pocket 42, flow to and control a mouthful X2.
Returnning spring 45 in the first valve pocket 42 is pressed between valve body 41 inwalls and unidirectional valve pocket 44 of control valve 40, thereby unidirectional valve pocket 44 is applied to active force, forces unidirectional valve pocket 44 to be pressed in spool 32 and is positioned near the end face of control mouthful X2.Therefore,, when the spool 32 of selector valve 30 moves, unidirectional valve pocket 44 can move along with the movement of spool 32.
In this Figure of description, illustrated seal bar 43 only plays exemplary effect with the structural type of unidirectional valve pocket 44, and control valve 40 is not limited to this kind of structural type.For example, valve rod can be pressed in the end face of selector valve 30 spools 32 under the effect of spring force, and unidirectional valve pocket 44 is fixed on the valve body 41 of control valve 40.
The flow area of flow area constant part can not be subject to the impact of relative position between seal bar 43 and unidirectional valve pocket 44, irrelevant with the movement of the spool 32 of selector valve 30.Flow area variable part is subject to the impact of relative position between seal bar 43 and unidirectional valve pocket 44.Specifically, when the control mouth X2 of selector valve 30 is not yet controlled used time of doing of hydraulic oil, the gap between seal bar 43 and unidirectional valve pocket 44 is maximum, i.e. the flow area variable part of oil duct 53() flow area in maximum rating.And enter a control mouthful X2 along with controlling hydraulic oil, the spool 32 of selector valve 30 starts to move away from controlling a mouthful X2, thereby unidirectional valve pocket 44 is moved away from seal bar 43, but the sealed department 433 of seal bar 43 is close to each other with the auxiliary section of unidirectional valve pocket 44, thereby the flow area between the two is reduced gradually.When sealing completely between the sealed department 433 of seal bar 43 and the auxiliary section 441 of unidirectional valve pocket 44 (if can complete totally enclosed words), the flow area variable part of oil duct 53 ends completely, as shown in Figure 4 and Figure 5.But, because the flow area constant part of oil duct 53 now still keeps oiler 51 and controls unimpeded between mouthful X2, therefore, still allowing to control hydraulic oil and flow to and control a mouthful X2 by this flow area constant part, the spool 32 that orders about selector valve 30 moves.
The flow area constant part of oil duct 53 can be realized by various structures form.For example, as shown in Figure 3 and Figure 4, the constant portion of described flow area comprises and is positioned at the valve body 41 of control valve 40 and is communicated with oiler 51 and controls the passage 531 of mouthful X2, is provided with the first damping 54 in this passage 531.The impact that act as buffer solution force feed of the first damping 54.
For another example, as shown in Figure 6, the flow area constant part of oil duct 53 comprises the passage 532 that is arranged on described seal bar 43 inside.When sealing completely between the sealed department 433 of seal bar 43 and the auxiliary section 441 of unidirectional valve pocket 44, control hydraulic oil and still can flow to and control a mouthful X2 by passage 532, thereby drive the spool of selector valve slowly to move.
Or, as shown in Figure 7 and Figure 8, the flow area constant part of oil duct 53 comprise be arranged on the sealed department 433 of seal bar 43 and/or 441 places, auxiliary section of unidirectional valve pocket 44 crack 533 or recess 534.That is to say, between the sealed department 433 of seal bar 43 and the auxiliary section 441 of unidirectional valve pocket 44, can not seal completely, the flow area constant part of oil duct 53 and flow area variable part are all to realize by the sealed department 433 of seal bar 43 and the auxiliary section 441 of unidirectional valve pocket 44.When contacting completely between the sealed department 433 of seal bar 43 and the auxiliary section 441 of unidirectional valve pocket 44, the flow area variable part cut-off of oil duct 53, but due to still gapped between sealed department 433 and auxiliary section 441, be above-mentioned cracking or recess, thereby stroke flow area constant part, still allow to control hydraulic oil and crack or recess flows to and controls a mouthful X2 by above-mentioned, thereby drive the slow movement of change-over valve core.
The rod-like members that seal bar 43 can be integrated, but in order to improve the manufacturability of seal bar 43, preferably, as shown in Figure 9, the assembly that seal bar 43 is assembled for a plurality of component, the seal 43 comprises: threaded piece 434, this threaded piece 434 is threaded with the valve body 41 of control valve 40; With rod member 435, this rod member 435 inserts in threaded piece 434 and is fixedly connected with this threaded piece 434.
Because seal bar 43 is assembly, it is all relative more easy therefore to manufacture, assemble and install.
As shown in figure 10, the utility model also provides a kind of hydraulic system that comprises above-mentioned reversing valve assembly, this hydraulic system comprises: oil hydraulic pump 10, main control valve 11, executive component 12 and reversing valve assembly provided by the utility model, oil hydraulic pump 10 is connected with executive component 12 by main control valve 11, main control valve 11 is connected with executive component 12 with the second oil circuit 22 by the first oil circuit 21 respectively, and the selector valve 30 of reversing valve assembly is connected in the second oil circuit 22 and the oiler 51 of control valve 40 communicates with the first oil circuit 21.
In this oil hydraulic circuit, thereby acting as of selector valve 30 controlled the connection direction of the second oil circuit 22 and makes reversing valve assembly play the effect of equilibrium valve because control valve 40 is connected in the first oil circuit 21.
When the high pressure liquid force feed flowing out when the B of main control valve 11 mouth flows to the B mouth of executive component 12, because the oiler 51 of control valve 40 communicates with the first oil circuit 21, so also enter control valve 40.And then can oil return and another part can enter the control mouth X2 of selector valve 30 in the control next part of this control valve 40, thereby the spool 32 that promotes fast and reposefully selector valve 30 moves, so that the second oil circuit 22 allows hydraulic oil to flow to the A mouth of main control valve 11 from the A mouth of executive component 12.
The high pressure liquid force feed flowing out when the A of main control valve 11 mouth flows to the A mouth of executive component 12 through selector valve 30, and then by the B mouth of executive component, flow to the B mouth of main control valve 11, because the hydraulic oil in the first oil circuit 21 is non-high pressure liquid force feed, therefore can not promote the spool action of selector valve 30.
Therefore, be combined with hydraulic system provided by the utility model, can when work, keep the second oil circuit fast and opening and closing stably, thereby obtain good working order.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present utility model, also can carry out combination in any, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (6)
1. reversing valve assembly, this reversing valve assembly comprises selector valve (30) and control valve (40), described selector valve (30) comprises having to be controlled the valve body (31) of mouthful (X2) and is arranged on movably the spool (32) in described valve body (31), it is characterized in that: described control valve (40) comprises valve body (41), this valve body (41) comprises oiler (51), the return opening (52) being communicated with this oiler (51) being provided with into oil damping (55) and is communicated with described oiler (51) and the oil duct that can partly end (53) of control mouthful (X2).
2. reversing valve assembly according to claim 1, is characterized in that, described return opening (52) is provided with oil return damping (57).
3. reversing valve assembly according to claim 1 and 2, is characterized in that, the valve body (41) of described control valve (40) has the first valve pocket (42) that communicates with described oiler (51) and return opening (52) and lead to described control mouthful (X2),
Described control valve (40) also comprises:
Seal bar (43), the first end (431) of sealing bar (43) is fixed on the valve body (41) of described control valve (40), and second end (432) contrary with described first end extends and have a sealed department (433) towards described control mouthful (X2) in described the first valve pocket (42);
Allow fluid only to flow to the described unidirectional valve pocket (44) of controlling mouthful (X2), this unidirectional valve pocket (44) is arranged on movably in described the first valve pocket (42) and with the sidewall of described the first valve pocket (42) and keeps sealing, described second end (432) of described seal bar (43) is positioned at described unidirectional valve pocket (44), and described unidirectional valve pocket (44) has the auxiliary section (441) that can coordinate with described sealed department (433); With
Returnning spring (45), this Returnning spring (45) is pressed in and between valve body (41) inwall of described control valve (40) and described unidirectional valve pocket (44) and to described unidirectional valve pocket (44), applies the active force of controlling mouthful (X2) towards described;
Described oil duct (53) comprise flow area constant part and depend on described seal bar (43) and unidirectional valve pocket (44) between the flow area variable part of relative position.
4. reversing valve assembly according to claim 3, it is characterized in that, the constant portion of described flow area comprises and is positioned at the valve body (41) of described control valve (40) and is communicated with described oiler (51) and controls the passage (531) of mouthful (X2), is provided with the first damping (54) in this passage (531);
The flow area constant part of described oil duct (53) comprises the passage (532) that is arranged on described seal bar (43) inside; Or
The flow area constant part of described oil duct (53) comprises and is arranged on cracking or recess (533,534) that the sealed department (433) of described seal bar (43) and/or the auxiliary section (441) of described unidirectional valve pocket (44) locate.
5. reversing valve assembly according to claim 3, is characterized in that, described seal bar (43) comprising:
Threaded piece (434), this threaded piece (434) is threaded with the valve body (41) of described control valve (40); With
Rod member (435), this rod member (435) inserts in described threaded piece (434) and with this threaded piece (434) and is fixedly connected with, and described sealed department (433) is positioned on this rod member (435).
6. hydraulic system, this hydraulic system comprises: oil hydraulic pump (10), main control valve (11), executive component (12) and according to the reversing valve assembly described in any one in claim 1-5, described oil hydraulic pump (10) is connected with described executive component (12) by described main control valve (11), described main control valve (11) is connected with described executive component (12) with the second oil circuit (22) by the first oil circuit (21) respectively, the selector valve of described reversing valve assembly (30) is connected in described the second oil circuit (22) and the oiler (51) of described control valve (40) communicates with described the first oil circuit 21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320512650.5U CN203463397U (en) | 2013-08-21 | 2013-08-21 | Reversing valve component and hydraulic system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320512650.5U CN203463397U (en) | 2013-08-21 | 2013-08-21 | Reversing valve component and hydraulic system comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203463397U true CN203463397U (en) | 2014-03-05 |
Family
ID=50175764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320512650.5U Withdrawn - After Issue CN203463397U (en) | 2013-08-21 | 2013-08-21 | Reversing valve component and hydraulic system comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203463397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423226A (en) * | 2013-08-21 | 2013-12-04 | 常德中联重科液压有限公司 | Reversing valve assembly and hydraulic system comprising same |
-
2013
- 2013-08-21 CN CN201320512650.5U patent/CN203463397U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423226A (en) * | 2013-08-21 | 2013-12-04 | 常德中联重科液压有限公司 | Reversing valve assembly and hydraulic system comprising same |
| CN103423226B (en) * | 2013-08-21 | 2016-02-24 | 常德中联重科液压有限公司 | Reversing valve assembly and comprise the hydraulic system of this reversing valve assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160224 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160224 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |