CN207093503U - A kind of piston sealing structure for hydraulic cylinder - Google Patents
A kind of piston sealing structure for hydraulic cylinder Download PDFInfo
- Publication number
- CN207093503U CN207093503U CN201720832575.9U CN201720832575U CN207093503U CN 207093503 U CN207093503 U CN 207093503U CN 201720832575 U CN201720832575 U CN 201720832575U CN 207093503 U CN207093503 U CN 207093503U
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- piston
- sealing structure
- hydraulic cylinder
- seal
- cylinder body
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Abstract
The utility model discloses a kind of piston sealing structure for hydraulic cylinder, it includes cylinder body, piston rod and piston, the piston rod can be movably arranged in the cylinder body, the piston is fixed on the piston rod and in the cylinder body, seal assembly is provided between the inwall of the piston and the cylinder body, wherein, the seal assembly includes being arranged at the double acting seal in the middle part of the piston, guide sleeve is may be contained within the both sides of the double acting seal on the piston, the guide sleeve connects with the oil pocket of the piston both sides.The above-mentioned piston sealing structure for hydraulic cylinder is not only simple in structure, and cost is low；And startup pressure is small, energy consumption is low, while coefficient of friction is low, extends the service life of seal.
Description
Technical field
A kind of hydraulic cylinder is the utility model is related to, more particularly, to a kind of piston sealing structure for hydraulic cylinder.
Background technology
Hydraulic jack is that hydraulic energy is changed into mechanical energy, does the hydraulic pressure execution of straight reciprocating motion (or oscillating motion)
Element.Its simple in construction, reliable operation.During with it to realize reciprocating motion, deceleration device can be removed from, and without between transmission
Gap, stable movement, therefore be used widely in various mechanical hydraulic systems.
Refer to shown in Fig. 1, Fig. 1 is the schematic diagram of the existing piston sealing structure for hydraulic cylinder.At present, it is existing
Piston sealing structure for hydraulic cylinder includes cylinder body 10, and piston 11 is provided with the cylinder body 10, and the piston 11 is fixed on
On piston rod 12, two guide rings 13, and the piston are arranged at intervals between the middle part of the piston 11 and the cylinder body 10
Lip-type packing 14 is provided between 11 both ends and the cylinder body 10.
Above-mentioned sealing structure has the disadvantage that in specific application：
1) need two lip-type packings 14 to be used cooperatively, could realize sealing function, cost is higher；
2) two lip-type packings 14 are simultaneously larger using frictional force, and required startup pressure is higher, increases power consumption；
As long as 3) one of them damage of seal just can not normal work, fault rate is higher；
4) guide ring 13 is not direct contacts with fluid, is in dry friction during work, is used in oil-free environment, easily mill
Damage, service life are short.
Utility model content
The purpose of this utility model is to provide a kind of piston sealing structure for hydraulic cylinder, and it is ensureing sealing
Under the premise of, there is the characteristics of cost is low, fault rate is low and service life is long, to solve to be used for the piston of hydraulic cylinder in the prior art
Above mentioned problem existing for sealing structure.
To use following technical scheme up to this purpose, the utility model：
A kind of piston sealing structure for hydraulic cylinder, it includes cylinder body, piston rod and piston, and the piston rod can move
Ground is arranged in the cylinder body, and the piston is fixed on the piston rod and in the cylinder body, the piston with it is described
Seal assembly is provided between the inwall of cylinder body, wherein, the seal assembly includes being arranged at the double acting in the middle part of the piston
Seal, guide sleeve, the guide sleeve and the piston are may be contained within the both sides of the double acting seal on the piston
The oil pocket connection of both sides.
Especially, the double acting seal is installed at the axial centre of the piston.
Especially, the double acting seal uses Glais ring.
Especially, the guide sleeve is the wear-resisting copper sheathing being fixedly welded on piston, and the inwall of the wear-resisting copper sheathing opens up
There is helical oil groove.
The beneficial effects of the utility model are, the piston sealing structure for hydraulic cylinder is not only compared with prior art
Simple in construction, cost is low；And startup pressure is small, energy consumption is low, while coefficient of friction is low, extends the service life of seal.
Brief description of the drawings
Fig. 1 is the schematic diagram of the existing piston sealing structure for hydraulic cylinder；
Fig. 2 is the schematic diagram for the piston sealing structure for hydraulic cylinder that the utility model embodiment 1 provides.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by embodiment.
Refer to shown in Fig. 2, Fig. 2 is the piston seal for hydraulic cylinder that the utility model embodiment 1 provides
The schematic diagram of structure.
In the present embodiment, a kind of piston sealing structure for hydraulic cylinder includes cylinder body 20, piston rod 21 and piston 22, institute
Stating piston rod 21 can movably be arranged in the cylinder body 20, and the piston 22 is fixed on the piston rod 21 and positioned at described
In cylinder body 20, seal assembly is provided between the inwall of the piston 22 and the cylinder body 20, wherein, the seal assembly includes
The Glais ring 23 being arranged at the axial centre of piston 22, it may be contained within the both sides of the Glais ring 23 on the piston 22
Guide sleeve 24, the guide sleeve 24 connect with the oil pocket of the both sides of piston 22.
The guide sleeve 24 is the wear-resisting copper sheathing being fixedly welded on piston 22, and the inwall of the wear-resisting copper sheathing offers spiral shell
Oil groove is revolved, in order to which the fluid in oil pocket enters helical oil groove, reduces friction.
The Glais ring 23 sealed with double acting is centrally located by the above-mentioned piston sealing structure for hydraulic cylinder, guide sleeve
24 are installed on the structure type of the both sides of Glais ring 23, realize sealing function using a sealing ring, cost is relatively low；When using simultaneously
Frictional force is small, and startup pressure is small, reduces energy consumption；And guide sleeve 24 directly contacts with fluid, fluid plays lubrication, prolongs
Long life.
Above example simply elaborates general principle and characteristic of the present utility model, and the utility model is not by above-mentioned example
Limitation, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change and change, these changes
Change and change and both fall within claimed the scope of the utility model.The utility model requires protection scope will by appended right
Ask book and its equivalent thereof.
Claims (4)
1. a kind of piston sealing structure for hydraulic cylinder, it includes cylinder body, piston rod and piston, and the piston rod can be movably
It is arranged in the cylinder body, the piston is fixed on the piston rod and in the cylinder body, the piston and the cylinder
Seal assembly is provided between the inwall of body, it is characterised in that the seal assembly includes being arranged at double in the middle part of the piston
Act on seal, may be contained within guide sleeve in the both sides of the double acting seal on the piston, the guide sleeve with it is described
The oil pocket connection of piston both sides.
2. the piston sealing structure according to claim 1 for hydraulic cylinder, it is characterised in that the double acting seal
It is installed at the axial centre of the piston.
3. the piston sealing structure according to claim 1 or 2 for hydraulic cylinder, it is characterised in that the double acting is close
Sealing uses Glais ring.
4. the piston sealing structure according to claim 1 for hydraulic cylinder, it is characterised in that the guide sleeve is welding
The wear-resisting copper sheathing being fixed on piston, the inwall of the wear-resisting copper sheathing offer helical oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720832575.9U CN207093503U (en) | 2017-07-10 | 2017-07-10 | A kind of piston sealing structure for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720832575.9U CN207093503U (en) | 2017-07-10 | 2017-07-10 | A kind of piston sealing structure for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207093503U true CN207093503U (en) | 2018-03-13 |
Family
ID=61556011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720832575.9U Active CN207093503U (en) | 2017-07-10 | 2017-07-10 | A kind of piston sealing structure for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207093503U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
-
2017
- 2017-07-10 CN CN201720832575.9U patent/CN207093503U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Huishan Yanqiao street Changan 214177 West Street in Jiangsu city of Wuxi province (No. 29 Changjiang Hydraulic Cylinder Factory) Patentee after: Wuxi Changjiang Hydraulic Cylinder Co., Ltd. Address before: Huishan Yanqiao street Changan 214177 West Street in Jiangsu city of Wuxi province (No. 29 Changjiang Hydraulic Cylinder Factory) Patentee before: Wuxi Changjiang Hydraulic Cylinder Factory |
|
| CP01 | Change in the name or title of a patent holder |