CN214534642U - Low-noise valve core sleeve - Google Patents
Low-noise valve core sleeve Download PDFInfo
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- CN214534642U CN214534642U CN202023164692.3U CN202023164692U CN214534642U CN 214534642 U CN214534642 U CN 214534642U CN 202023164692 U CN202023164692 U CN 202023164692U CN 214534642 U CN214534642 U CN 214534642U
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Abstract
The utility model relates to a low noise case cover belongs to hydraulic drive spare technical field. The valve core sleeve comprises a valve core and a valve sleeve sleeved outside the valve core, wherein the excircle of the valve core is provided with a middle subsection ring groove, and two sides of the middle subsection ring groove are respectively provided with a front flow channel switching groove and a rear flow channel switching groove which are circumferentially distributed; the valve sleeve is provided with a plurality of groups of flow channel switching holes which are axially distributed at intervals, the flow channel switching holes adjacent to the transmission output end are positioned in the annular groove and comprise six pairs of switching through holes which are uniformly distributed in the circumferential direction; the axial position of the valve core corresponding to the valve sleeve switching perforation is provided with three paired inner extension switching grooves and outer extension switching grooves which are uniformly distributed in the circumferential direction; the widths of the inner extension switching groove and the outer extension switching groove are equal and larger than the diameter of the switching through hole, and the distance between the inner extension switching groove and the outer extension switching groove is matched with the distance between the adjacent switching through holes. The test shows, compare with prior art, adopt the utility model discloses a full hydraulic steering ware during operation, the noise obviously reduces, consequently very is suitable for the higher occasion of environmental protection requirement.
Description
Technical Field
The utility model relates to a case cover, especially a low noise case cover belong to hydraulic drive spare technical field.
Background
The valve core sleeve is formed by combining a valve core and a valve sleeve sleeved outside the valve core sleeve, is a core component of a full hydraulic steering gear (the typical structure of the valve core sleeve is disclosed in Chinese patent literature with application number 201110195256.9 and name full hydraulic steering gear), and is used for switching oil ways as required to realize required steering operation. For a long time, the traditional valve core sleeve structure is shown in fig. 1 to 3 and is formed by combining a valve core 2 with one end for transmission input and the other end for transmission output and a valve sleeve 1 sleeved outside the valve core 2, wherein the excircle of the valve core 2 is provided with a middle subsection ring groove 2-1, and two sides of the middle subsection ring groove 2-1 are respectively provided with a front flow channel switching groove 2-2 and a rear flow channel switching groove 2-3 which are circumferentially distributed; the valve sleeve 1 is provided with a plurality of groups of flow channel switching holes which are distributed at intervals in the axial direction, wherein the flow channel switching holes adjacent to the transmission output end are composed of six switching through holes 1-1 which are uniformly distributed in the circumferential direction.
With the gradual popularization and application of original engineering vehicles such as forklifts in the industries of indoor storage, medicine, food and the like, the hydraulic steering operation is lighter and more flexible through miniaturization, and the requirement on noise is increasingly strict. The traditional valve core sleeve is difficult to meet the requirement of noise index.
Disclosure of Invention
The utility model aims to provide a: aiming at the problem that the noise in the prior art is difficult to reach the standard, the low-noise valve core sleeve is provided through structural improvement, so that the noise is reduced on the premise of ensuring the use performance, and the requirement of the expanded industry is met.
In order to achieve the above purpose, the utility model discloses the basic technical scheme of low noise case cover is: the valve comprises a valve core and a valve sleeve, wherein one end of the valve core is used for transmission input, the other end of the valve core is used for transmission output, the valve sleeve is sleeved outside the valve core, a middle subsection ring groove is formed in the excircle of the valve core, and a front flow channel switching groove and a rear flow channel switching groove which are circumferentially distributed are formed in two sides of the middle subsection ring groove respectively; the valve sleeve is provided with a plurality of groups of flow channel switching holes which are axially distributed at intervals, the flow channel switching holes adjacent to the transmission output end are positioned in the annular groove and comprise six pairs of switching through holes which are uniformly distributed in the circumferential direction; the axial position of the valve core corresponding to the valve sleeve switching perforation is provided with three paired inner extension switching grooves and three paired outer extension switching grooves which are uniformly distributed in the circumferential direction; the width of the inner extension switching groove is equal to that of the outer extension switching groove, and the width of the inner extension switching groove is larger than the diameter of the switching through hole, and the distance between the inner extension switching groove and the outer extension switching groove is matched with the distance between the adjacent switching through holes.
The above technical scheme of the utility model is based on the deep analysis research of applicant to prior art. Research and tests show that six independent switching through holes uniformly distributed in the circumferential direction of a valve sleeve in the prior art respectively correspond to corresponding oil switching grooves in a valve core, and the connecting and communicating part of a flow passage formed by the holes and the grooves is not in smooth transition, so that high-pressure hydraulic oil flows through the valve sleeve easily to generate squeal due to pressure impact, and the noise is high. And six pairs of switching perforations embedded in the ring grooves are changed, the oil inlets are communicated through the ring grooves, high-pressure oil is uniformly distributed on the valve sleeve, noise is effectively inhibited, and the original single holes are changed into paired switching perforations matched with paired oil switching grooves, so that the paired oil switching grooves are respectively communicated with the oil inlets and the oil return of the high-pressure hydraulic oil, a smooth oil return channel is formed, and the noise is obviously reduced.
The utility model discloses further perfection is, the middle part runner groove that the middle section annular of case excircle was worn through circumference and is distributed, preceding runner switching groove staggers with the angular position in middle part runner groove with back runner switching groove.
The utility model discloses further perfect is, the width that interior extension switched groove and epitaxial switched groove equals.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a schematic view of the valve housing of fig. 1.
Fig. 3 is a sectional view B-B of fig. 2.
Fig. 4 is a schematic structural view of a valve sleeve according to an embodiment of the present invention.
Fig. 5 is a sectional view a-a of fig. 4.
Fig. 6 is a schematic view of a new structure of a valve according to an embodiment of the present invention.
Fig. 7 is a cross-sectional view taken along line C-C of fig. 6.
Detailed Description
Example one
The low-noise valve core sleeve of the embodiment basically comprises a valve core 2 with a left end transmission input and a right end transmission output and a valve sleeve 1 sleeved outside the valve core 2, and is shown in figure 1.
As shown in fig. 4 and 5, the valve sleeve 1 has six sets of flow channel switching holes distributed at intervals in the axial direction, the flow channel switching holes adjacent to the transmission output end are located in the annular grooves 1-2, and each of the flow channel switching holes 1-1 ' includes six pairs of circumferentially and uniformly distributed switching through holes 1-1 ', and the aperture of each of the switching through holes 1-1 ' is 0.9 mm.
As shown in figures 6 and 7, the valve core 2 is provided with a middle subsection ring groove 2-1 penetrating through a middle runner groove 2-4 distributed circumferentially on the outer circle, a front runner switching groove 2-2 and a rear runner switching groove 2-3 distributed circumferentially are respectively arranged on two sides of the middle subsection ring groove 2-1, and the angular positions of the front runner switching groove 2-2 and the rear runner switching groove 2-3 and the middle runner groove 2-4 are staggered. The axial position of the valve core 2, which corresponds to the switching perforation 1-1 'of the valve sleeve 1 and is adjacent to the flow channel switching hole of the transmission output end, is provided with three paired inner-extending switching grooves 2-5 and an outer-extending switching groove 2-5' which are uniformly distributed in the circumferential direction; the widths of the inner extension switching grooves 2-5 and the outer extension switching grooves 2-5 ' are equal and are 3mm, the widths are larger than the diameters of the switching through holes by 0.9mm, and the distance between the inner extension switching grooves 2-5 and the outer extension switching grooves 2-5 ' is matched with the distance between the adjacent switching through holes 1-1 '.
Tests show that compared with the prior art, when the full hydraulic steering gear works, the noise is obviously reduced, so that the full hydraulic steering gear is very suitable for occasions with higher environmental protection requirements.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (3)
1. A low-noise valve core sleeve comprises a valve core and a valve sleeve, wherein one end of the valve core is used for transmission input, the other end of the valve core is used for transmission output, and the valve sleeve is sleeved outside the valve core; the outer circle of the valve core is provided with a middle subsection ring groove, and both sides of the middle subsection ring groove are respectively provided with a front flow channel switching groove and a rear flow channel switching groove which are circumferentially distributed; the method is characterized in that: the valve sleeve is provided with a plurality of groups of flow channel switching holes which are axially distributed at intervals, the flow channel switching holes adjacent to the transmission output end are positioned in the annular groove and comprise six pairs of switching through holes which are uniformly distributed in the circumferential direction; the axial position of the valve core corresponding to the valve sleeve switching perforation is provided with three paired inner extension switching grooves and three paired outer extension switching grooves which are uniformly distributed in the circumferential direction; the width of the inner extension switching groove and the width of the outer extension switching groove are larger than the diameter of the switching through hole, and the distance between the inner extension switching groove and the outer extension switching groove is matched with the distance between the adjacent switching through holes.
2. The low noise spool sleeve of claim 1, wherein: the middle subsection ring groove of the valve core excircle penetrates through the middle runner groove which is circumferentially distributed, and the angular positions of the front runner switching groove and the rear runner switching groove are staggered with the angular positions of the middle runner groove.
3. The low noise spool sleeve of claim 2, wherein: the widths of the inner extension switching groove and the outer extension switching groove are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023164692.3U CN214534642U (en) | 2020-12-25 | 2020-12-25 | Low-noise valve core sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023164692.3U CN214534642U (en) | 2020-12-25 | 2020-12-25 | Low-noise valve core sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214534642U true CN214534642U (en) | 2021-10-29 |
Family
ID=78296365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023164692.3U Active CN214534642U (en) | 2020-12-25 | 2020-12-25 | Low-noise valve core sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214534642U (en) |
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2020
- 2020-12-25 CN CN202023164692.3U patent/CN214534642U/en active Active
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