CN204729390U - A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder - Google Patents
A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder Download PDFInfo
- Publication number
- CN204729390U CN204729390U CN201520476484.7U CN201520476484U CN204729390U CN 204729390 U CN204729390 U CN 204729390U CN 201520476484 U CN201520476484 U CN 201520476484U CN 204729390 U CN204729390 U CN 204729390U
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- type sealing
- drain pan
- gland
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model relates to a kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder.Its technological scheme is: the profile of guide sleeve (4) is the entirety that large cylinder and small cylinder are formed, and the inwall of guide sleeve (4) has 2 ~ 3 balancing slits (2) equably; The cylindrical of the O type Sealing (3) that guide sleeve (4) is equipped with has arc notch (17), the arc degree of depth of arc notch (17) is 0.5 ~ 0.6, arc radius R of O type Sealing (3) cross section diameter is 1/2 ~ 2/3 of O type Sealing (3) cross section diameter.The end face of the small cylinder of guide sleeve (4) is equipped with the 2nd O type Sealing (6).The cylndrical surface of gland (12) has outer ring drain pan (13), the inwall of gland (12) has interior annular drain pan (11), and the drain path (9) had in the bottom of outer ring drain pan (13) communicates with the oil leak hole (8) on interior annular drain pan (11) and cylinder body (14).The utility model has the advantages that structure is simple, frictional force is little, frequency response is fast, reliability is high, the life-span is long and leakage rate is little.
Description
Technical field
The utility model belongs to varying clearance seal formula oil hydraulic cylinder technical field.Be specifically related to a kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder.
Background technique
One of key element of Hydrauservo System is servo hydraulic cylinder.Because operating mode is special, require that servo hydraulic cylinder frictional force is little, frequency response is high, reliability is high and the life-span is grown, to meet the quiet of Hydrauservo System and the requirement of dynamic characteristic energy.So selecting of the seal form between the piston rod of servo hydraulic cylinder and guide sleeve and material is very important, it be restriction servo hydraulic cylinder fast and the key factor in high frequency response and life-span thereof.
At present, the sealing between the piston rod of servo hydraulic cylinder and guide sleeve is the nonmetallic material ring and the O type rubber ring group all-in-one-piece composite sealing ring that adopt square or rectangular cross-section, and it has good wear resistance and oil resistance, and friction factor is little.But its assembly technology is complicated, easily generates heat when high speed and high frequency sound, affect hydraulic cylinder life.Adopt dynamic and static back guiding device that piston rod is supported on guide sleeve center, avoid piston rod surface to contact with the inner circle of guide sleeve, reduce frictional force with this and increase the service life.But this guide sleeve increases a set of oil supplying device, complex structure adds cost, and increases energy ezpenditure.
Summary of the invention
The utility model is intended to overcome above-mentioned technological deficiency, and object is to provide the pressure adaptive clearance seal guidance system oil hydraulic cylinder that a kind of structure is simple, easy to maintenance, frictional force is little, frequency response is fast, reliability is high, the life-span is long and leakage rate is little.
To achieve these goals, the technical solution adopted in the utility model is: the interior edge face installation of end cap is close in the exterior edge face of gland, the exterior edge face of guide sleeve is close to gland and is installed, and piston is arranged in cylinder body actively, and piston rod is coaxially through guide sleeve, gland and end cap.The profile of guide sleeve is the desk-top entirety of circular cylindrical projection that large cylinder and small cylinder are formed, described guide sleeve be provided with central through bore, the inwall of described central through bore has 2 ~ 3 balancing slits equably.An O type Sealing is equipped with in the cylndrical surface of the large cylinder of guide sleeve, and the cylindrical of an O type Sealing has arc notch, and the end face of the small cylinder of guide sleeve is equipped with the 2nd O type Sealing.Near the cylndrical surface of gland interior edge face, Y type Sealing is housed, outer ring drain pan is had near the cylndrical surface of gland exterior edge face, inwall near gland exterior edge face has interior annular drain pan, drain path is had in the bottom of outer ring drain pan, drain path communicates with interior annular drain pan, and drain path communicates with the oil leak hole on cylinder body.
The arc degree of depth of described arc notch is 0.5 ~ 0.6, arc radius R of an O type Sealing cross section diameter is 1/2 ~ 2/3 of an O type Sealing cross section diameter.
The material of described guide sleeve is aluminum bronze, and the external diameter of the small cylinder of described guide sleeve is 1/2 ~ 2/3 of the large cylinder external diameter of guide sleeve; The length L of the large cylinder of described guide sleeve
1=(0.5 ~ 1) d, the length L of the small cylinder of described guide sleeve
2d, d are diameter of piston rod in=(0.5 ~ 1).
The bottom section shape of described balancing slit is circular arc.
The material of a described O type Sealing is oil resistant rubber.
The material of the 2nd described O type Sealing is oil resistant rubber.
When mounted, " Y " type mouth of Y type Sealing is just to the interior edge face of gland for described Y type Sealing.
The cross-sectional width of described interior annular drain pan is 2 ~ 4mm, and the degree of depth is 1 ~ 2mm; The sectional dimension of outer ring drain pan is identical with interior annular drain pan, and the diameter of drain path is identical with the cross-sectional width of interior annular drain pan.
Owing to adopting technique scheme, the utility model has the following advantages:
1, static-pressure oil chamber of the present utility model is made up of the inwall of the ring surface of the large cylinder of guide sleeve, the small cylindrical surface of guide sleeve, the interior edge face of gland and cylinder body, static-pressure oil chamber is entered in the arc notch that hydraulic oil is directly opened from the cylindrical of an O type Sealing, given up traditional oil supplying device, therefore overall structure is simple, easy to maintenance.
2, the small cylinder of guide sleeve adopts aluminum bronze manufacture, has good resiliently deformable.After pressure oil enters static-pressure oil chamber, pressure raises, and the small cylinder of guide sleeve inwardly shrinks under pressure, the small cylinder gap smaller of piston rod and guide sleeve, can effectively reduce hydraulic oil by gap toward external leakage.
3, the utility model has arc notch at the cylindrical of an O type Sealing, the arc degree of depth of described arc notch is 0.5 ~ 0.6 of an O type Sealing cross section diameter, arc radius R is 1/2 ~ 2/3 of an O type Sealing cross section diameter, the fluid of rod chamber (15) enters static-pressure oil chamber by arc notch and forms the support of annular Dynamic And Static Loads, the sealing between piston rod and guide sleeve can be improved, make this oil hydraulic cylinder frequency response fast and reliability is high and the life-span is long.
4, the central through bore inwall of guide sleeve has 2 ~ 3 balancing slits equably, and the section of balancing slit is circular arc, can reduce friction.
5, the cylndrical surface of gland has outer ring drain pan, and the inwall of gland has interior annular drain pan, has drain path in the bottom of outer ring drain pan, and drain path communicates with interior annular drain pan, and drain path communicates with the oil leak hole on cylinder body.Leak fluid and flow to fuel tank by oil leak hole, effectively can reduce external leakage.
Therefore, the utility model has the advantages that structure is simple, easy to maintenance, frictional force is little, frequency response is fast, reliability is high, the life-span is long and leakage rate is little.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of model utility;
Fig. 2 is the schematic shapes of Sealing (3) in Fig. 1;
Fig. 3 is the close-up schematic view of I in Fig. 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further, not the restriction of the utility model protection domain.
Embodiment 1
A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder.The structure of the present embodiment is as shown in Figure 1: the interior edge face that end cap 10 is close in the exterior edge face of gland 12 is installed, the exterior edge face of guide sleeve 4 is close to gland 12 and is installed, piston 16 is arranged in cylinder body 14 actively, and piston rod 1 is coaxially through guide sleeve 4, gland 12 and end cap 10.The profile of guide sleeve 4 is the desk-top entirety of circular cylindrical projection that large cylinder and small cylinder are formed, described guide sleeve 4 be provided with central through bore, the inwall of described central through bore has 2 ~ 3 balancing slits 2 equably.An O type Sealing 3 is equipped with in the cylndrical surface of the large cylinder of guide sleeve 4, as shown in Figures 2 and 3, the cylindrical of an O type Sealing 3 has arc notch 17, and the end face of the small cylinder of guide sleeve 4 is equipped with the 2nd O type Sealing 6.Near the cylndrical surface of gland 12 interior edge face, Y type Sealing 7 is housed, outer ring drain pan 13 is had near the cylndrical surface of gland 12 exterior edge face, inwall near gland 12 exterior edge face has interior annular drain pan 11, drain path 9 is had in the bottom of outer ring drain pan 13, drain path 9 communicates with interior annular drain pan 11, and drain path 9 communicates with the oil leak hole 8 on cylinder body 14.
The arc degree of depth of described arc notch 17 is 0.5 ~ 0.6, arc radius R of O type Sealing 3 cross section diameter is 1/2 ~ 2/3 of O type Sealing 3 cross section diameter.
The material of described guide sleeve 4 is aluminum bronze, and the external diameter of the small cylinder of described guide sleeve 4 is 1/2 ~ 2/3 of the large cylinder external diameter of guide sleeve 4; The length L of the large cylinder of described guide sleeve 4
1=(0.5 ~ 0.8) d, the length L of the small cylinder of described guide sleeve 4
2d, d are diameter of piston rod in=(0.5 ~ 0.8).
The bottom section shape of described balancing slit 2 is circular arc.
The material of a described O type Sealing 3 is oil resistant rubber.
The material of the 2nd described O type Sealing 6 is oil resistant rubber.
When mounted, " Y " type mouth of Y type Sealing 7 is just to the interior edge face of gland 12 for described Y type Sealing 7.
The cross-sectional width of described interior annular drain pan 11 is 2 ~ 4mm, and the degree of depth is 1 ~ 2mm; The sectional dimension of outer ring drain pan 13 is identical with interior annular drain pan 11, and the diameter of drain path 9 is identical with the cross-sectional width of interior annular drain pan 11.
Embodiment 2
A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder.Except following technical parameter, all the other are with embodiment 1:
The length L of the large cylinder of described guide sleeve 4
1=(0.7 ~ 1) d, the length L of the small cylinder of described guide sleeve 4
2d, d are diameter of piston rod in=(0.7 ~ 1).
This embodiment has the following advantages:
1, the static-pressure oil chamber 5 of this embodiment is made up of the inwall of the ring surface of the large cylinder of guide sleeve 4, the small cylindrical surface of guide sleeve 4, the interior edge face of gland 12 and cylinder body 14, static-pressure oil chamber 5 is entered in the arc notch 17 that hydraulic oil is directly opened from the cylindrical of an O type Sealing 3, given up traditional oil supplying device, therefore overall structure is simple, easy to maintenance.
2, the small cylinder of guide sleeve 4 adopts aluminum bronze manufacture, has good resiliently deformable.After pressure oil enters static-pressure oil chamber 5, pressure raises, and the small cylinder of guide sleeve 4 inwardly shrinks under pressure, and piston rod 1 and the small cylinder gap smaller of guide sleeve 4, can reduce hydraulic oil by gap effectively toward external leakage.
3, this embodiment has arc notch 17 at the cylindrical of an O type Sealing 3, the arc degree of depth of described arc notch 17 is 0.5 ~ 0.6 of O type Sealing 3 cross section diameter, arc radius R is 1/2 ~ 2/3 of O type Sealing 3 cross section diameter, the fluid of rod chamber 15 enters static-pressure oil chamber 5 by arc notch 17 and forms the support of annular Dynamic And Static Loads, the sealing between piston rod and guide sleeve can be improved, make this oil hydraulic cylinder frequency response fast and reliability is high and the life-span is long.
4, the central through bore inwall of guide sleeve 4 has 2 ~ 3 balancing slits 2 equably, and the section of balancing slit 2 is circular arc, can reduce friction.
5, the cylndrical surface of gland 12 has outer ring drain pan 13, the inwall of gland 12 has interior annular drain pan 11, have drain path 9 in the bottom of outer ring drain pan 13, drain path 9 communicates with interior annular drain pan 11, and drain path 9 communicates with the oil leak hole 8 on cylinder body 14.Leak fluid and flow to fuel tank by oil leak hole 8, effectively can reduce external leakage.
Therefore, this embodiment has the advantages that structure is simple, easy to maintenance, frictional force is little, frequency response is fast, reliability is high, the life-span is long and leakage rate is little.
Claims (7)
1. a pressure adaptive clearance seal guidance system oil hydraulic cylinder, it is characterized in that: the interior edge face installation of end cap (10) is close in the exterior edge face of gland (12), the exterior edge face of guide sleeve (4) is close to gland (12) and is installed, piston (16) is arranged in cylinder body (14) actively, and piston rod (1) is coaxially through guide sleeve (4), gland (12) and end cap (10); The profile of guide sleeve (4) is the desk-top entirety of circular cylindrical projection that large cylinder and small cylinder are formed, described guide sleeve (4) be provided with central through bore, the inwall of described central through bore has 2 ~ 3 balancing slits (2) equably; An O type Sealing (3) is equipped with in the cylndrical surface of the large cylinder of guide sleeve (4), the cylindrical of the one O type Sealing (3) has arc notch (17), and the end face of the small cylinder of guide sleeve (4) is equipped with the 2nd O type Sealing (6); Near the cylndrical surface of gland (12) interior edge face, Y type Sealing (7) is housed, outer ring drain pan (13) is had near the cylndrical surface of gland (12) exterior edge face, inwall near gland (12) exterior edge face has interior annular drain pan (11), drain path (9) is had in the bottom of outer ring drain pan (13), drain path (9) communicates with interior annular drain pan (11), and drain path (9) communicates with the oil leak hole (8) on cylinder body (14);
The arc degree of depth of described arc notch (17) is 0.5 ~ 0.6, arc radius R of O type Sealing (3) cross section diameter is 1/2 ~ 2/3 of O type Sealing (3) cross section diameter.
2. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, it is characterized in that the material of described guide sleeve (4) is aluminum bronze, the external diameter of the small cylinder of described guide sleeve (4) is 1/2 ~ 2/3 of the large cylinder external diameter of guide sleeve (4); The length L of the large cylinder of described guide sleeve (4)
1=(0.5 ~ 1) d, the length L of the small cylinder of described guide sleeve (4)
2d, d are diameter of piston rod in=(0.5 ~ 1).
3. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, is characterized in that the bottom section shape of described balancing slit (2) is circular arc.
4. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, is characterized in that the material of a described O type Sealing (3) is oil resistant rubber.
5. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, is characterized in that the material of the 2nd described O type Sealing (6) is oil resistant rubber.
6. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, it is characterized in that described Y type Sealing (7) when mounted, " Y " type mouth of Y type Sealing (7) is just to the interior edge face of gland (12).
7. pressure adaptive clearance seal guidance system oil hydraulic cylinder according to claim 1, it is characterized in that the cross-sectional width of described interior annular drain pan (11) is 2 ~ 4mm, the degree of depth is 1 ~ 2mm; The sectional dimension of outer ring drain pan (13) is identical with interior annular drain pan (11), and the diameter of drain path (9) is identical with the cross-sectional width of interior annular drain pan (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476484.7U CN204729390U (en) | 2015-07-03 | 2015-07-03 | A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476484.7U CN204729390U (en) | 2015-07-03 | 2015-07-03 | A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729390U true CN204729390U (en) | 2015-10-28 |
Family
ID=54387747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520476484.7U Withdrawn - After Issue CN204729390U (en) | 2015-07-03 | 2015-07-03 | A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989696A (en) * | 2015-07-03 | 2015-10-21 | 武汉科技大学 | Variable-gap sealing type hydraulic cylinder of guide system |
-
2015
- 2015-07-03 CN CN201520476484.7U patent/CN204729390U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989696A (en) * | 2015-07-03 | 2015-10-21 | 武汉科技大学 | Variable-gap sealing type hydraulic cylinder of guide system |
| CN104989696B (en) * | 2015-07-03 | 2017-04-12 | 武汉科技大学 | Variable-gap sealing type hydraulic cylinder of guide system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102003491B (en) | Electromagnetic double-cylinder magneto-rheological damper | |
| CN103486268B (en) | Pump dry gas mechanical seal device | |
| US11661990B2 (en) | Formation method for liquid rubber composite nodes with tubular flow channel | |
| US20170211720A1 (en) | Balanced valve element and pressure regulating valve | |
| CN109281891A (en) | A kind of sealing piston of hydraulic cylinder device and hydraulic cylinder that seal clearance is variable | |
| CN204729390U (en) | A kind of pressure adaptive clearance seal guidance system oil hydraulic cylinder | |
| CN104632755B (en) | A kind of heavily loaded servo hydraulic cylinder of anti-bias load | |
| CN104989696B (en) | Variable-gap sealing type hydraulic cylinder of guide system | |
| US20170130850A1 (en) | Valve seat ring and multi-way valve having valve seat ring | |
| CN205841362U (en) | A kind of new type superthin cylinder | |
| CN212616283U (en) | External cooling type sealing box structure | |
| CN204344567U (en) | A kind of without sealing servo-cylinder | |
| CN209977426U (en) | Valve rod sealing structure of floating ball valve | |
| CN204201128U (en) | A kind of valve seat construction of synthetic gas butterfly valve | |
| CN209469643U (en) | A kind of high-speed overload actuator | |
| CN203335377U (en) | Self-adaption loss-free plunger pump shaft sealing device | |
| CN203516830U (en) | High-pressure balanced type three-way control valve | |
| CN208474570U (en) | one-way valve | |
| CN203115162U (en) | Double-piece type inner thread ball valve | |
| CN202971284U (en) | Centrifugal pump shaft | |
| CN107965544B (en) | Adjustable damper | |
| CN206054720U (en) | A kind of inside injection grease seal ring in adjustable sealing gap | |
| CN201909104U (en) | Labyrinth type regulation valve | |
| CN214534581U (en) | Pressure balance type cage type single-seat regulating valve | |
| CN106246910B (en) | A kind of adjustable dense seal of internal injection lubricating grease |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151028 Effective date of abandoning: 20170412 |