CN212899183U - Piston lubricating and sealing device for piston type energy accumulator - Google Patents
Piston lubricating and sealing device for piston type energy accumulator Download PDFInfo
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- CN212899183U CN212899183U CN202021024020.XU CN202021024020U CN212899183U CN 212899183 U CN212899183 U CN 212899183U CN 202021024020 U CN202021024020 U CN 202021024020U CN 212899183 U CN212899183 U CN 212899183U
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Abstract
The utility model relates to a hydraulic component technical field specifically discloses a piston lubrication sealing device for piston energy storage ware, including the barrel and set up in piston in the barrel, be provided with the oil pocket in the barrel, turn right by a left side and has set gradually first support ring, one-way seal, two way seal and second support ring, be provided with an annular groove between one-way seal and the two way seal, be provided with a check valve between oil pocket and the annular groove. The utility model discloses make the twice of double containment structure's piston accumulator sealed can both exert self advantage and can prolong its life.
Description
Technical Field
The utility model relates to a hydraulic component technical field, in particular to a piston lubrication sealing device for piston accumulator.
Background
The piston accumulator is an energy-storing hydraulic element for storing energy in hydraulic system or absorbing pressure fluctuation in hydraulic system, and is generally composed of a cylinder, a piston, two end covers and a set of seals. The piston divides the cavity in the cylinder of the piston energy accumulator into two volumes which are not communicated with each other, one cavity is communicated with a hydraulic system pipeline through a connector and used for storing and discharging high-pressure hydraulic oil, and the other end is filled with nitrogen with proper pressure. When the redundant pressure oil of the hydraulic system enters the oil cavity of the energy accumulator through the pipeline, the piston is pushed to move towards the air end and compress the nitrogen of the air cavity, and the piston stops moving when the pressure of the redundant pressure oil of the hydraulic system and the nitrogen of the air cavity reach pressure balance. When the hydraulic system needs the pressure oil, the compressed nitrogen pushes the piston to move towards the oil end and discharges the pressure oil to work for the hydraulic system.
Acting as a piston and a seal thereon, it acts to separate the compressed nitrogen from the hydraulic oil. Generally, the piston seal is composed of two sealing rings, lubrication between the two sealing rings is an important influence factor of the service life of the sealing rings, the lubrication and the sealing are a pair of spear shield bodies, the lubrication is good, the sealing is not good, and the sealing is good, and the lubrication is not good. The existing structure is two kinds: one is not lubricated, its advantage is simple in construction, the disadvantage is that the seal ring has a low service life, need frequent aeration and change the seal ring in the life cycle of the energy accumulator; the other is that the air end of the piston is drilled and communicated between two seals (the structure is not suitable for the occasions using two one-way seals), so that the lubricating oil stored in advance in the air end can lubricate the sealing ring.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a piston lubrication sealing device for piston accumulator is provided for the twice of double containment structure's piston accumulator is sealed can both exert self advantage and can prolong its life.
In order to solve the technical problem, the technical scheme of the utility model is that:
the piston lubricating and sealing device for the piston type energy accumulator comprises a cylinder body and a piston arranged in the cylinder body, wherein an oil cavity is formed in the cylinder body, a first supporting ring, a one-way seal, a two-way seal and a second supporting ring are sequentially arranged outside the piston from left to right, an annular groove is formed between the one-way seal and the two-way seal, and a one-way valve is arranged between the oil cavity and the annular groove.
Preferably, the check valve includes a valve cover, a spring, a valve seat, a steel ball and a sealing ring, the valve seat is disposed in the piston, the steel ball is pressed against the valve seat by the spring, the sealing ring is disposed on the outer side of the valve seat, and the valve cover is disposed on the left side of the valve seat.
Preferably, the piston is provided with a screw hole, the valve seat is arranged in the screw hole through threads, and the sealing ring is arranged between the piston and the valve seat.
Preferably, one end of the spring abuts against the valve cover, and the other end of the spring abuts against the steel ball.
Preferably, an air cavity is arranged in the cylinder, the oil cavity is arranged on the left side of the piston, and the air cavity is arranged on the right side of the piston.
Preferably, the annular groove is used for storing lubricating oil, and the lubricating oil is used for communicating the closed volume with the oil cavity through the one-way valve and providing lubrication for the one-way seal and the two-way seal.
Adopt above-mentioned technical scheme, the utility model provides a pair of a piston lubrication sealing device for piston accumulator has following beneficial effect: the annular groove is arranged between the one-way seal and the two-way seal, the one-way valve is arranged between the oil cavity and the annular groove, and lubricating oil is provided for the two seals through micro leakage of the one-way valve to solve the problem that the service lives of the two one-way seals and the two-way seals on the piston are short, so that the two seals of the piston type energy accumulator with the double-seal structure can exert the advantages of the two seals, and the purpose of prolonging the service life of the piston type energy accumulator is achieved; and the piston lubricating and sealing device has a small structure, and does not influence the original design of each part of the piston energy accumulator.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1-a valve cover, 2-a spring, 3-a valve seat, 4-a steel ball, 5-a sealing ring, 6-a piston, 7-a first supporting ring, 8-a one-way seal, 9-a two-way seal, 10-a second supporting ring, 11-an annular groove, 12-a cylinder, 13-an air cavity, 14-an oil cavity and 15-a one-way valve.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
As shown in fig. 1, in the structural schematic diagram of the present invention, the piston lubrication sealing device for a piston accumulator includes a cylinder 12 and a piston 6 disposed in the cylinder 12, an oil chamber 14 is disposed in the cylinder 12, and is characterized in that: the piston 6 is provided with a first support ring 7, a one-way seal 8, a two-way seal 9 and a second support ring 10 in sequence from left to right outside, an annular groove 11 is arranged between the one-way seal 8 and the two-way seal 9, and a one-way valve 15 is arranged between the oil chamber 14 and the annular groove 11. It can be understood that, in order to reduce the friction coefficient between the piston 6 and the cylinder 12 and increase the response frequency of the piston 6, two support rings (i.e. the first support ring 7 and the second support ring 10) are generally provided on the piston 6; in order to solve the problem that the life of twice sealing (being one-way seal 8 and two-way seal 9) is low on the piston 6, the utility model discloses set up an annular groove 11 between the twice sealing of piston 6 (being one-way seal 8 and two-way seal 9), set up a check valve 15 between the oil pocket 14 of piston accumulator and this annular groove 11, provide lubricating oil for twice sealing (being one-way seal 8 and two-way seal 9) through the small seepage of check valve 15 and reach the purpose that prolongs life.
Specifically, the check valve 15 includes a valve cover 1, a spring 2, a valve seat 3, a steel ball 4 and a sealing ring 5, the valve seat 3 is disposed in the piston 6, the steel ball 4 is pressed against the valve seat 3 by the spring 2, the sealing ring 5 is disposed outside the valve seat 3, and the valve cover 1 is disposed on the left side of the valve seat 3; the piston 6 is provided with a screw hole, the valve seat 3 is arranged in the screw hole through threads, and the sealing ring 5 is arranged between the piston and the valve seat 3; one end of the spring 2 props against the valve cover 1, and the other end of the spring 2 props against the steel ball 4; an air cavity 13 and an oil cavity 14 are arranged in the cylinder 12, the oil cavity 14 is arranged on the left side of the piston 6, and the air cavity 13 is arranged on the right side of the piston 6; the annular groove 11 communicates with the oil chamber 14 through the check valve 15. It can be understood that the check valve 15 is composed of a valve cover 1, a spring 2, a valve seat 3, a steel ball 4 and a sealing ring 5, the valve seat 3 is screwed in a screw hole of the piston 6 through threads, the steel ball 4 is pressed on the valve seat 3 all the time through pretightening force provided by the spring 2, the sealing ring 5 is used for ensuring the sealing of a gap between the valve seat 3 and the piston 6, and the valve cover 1 plays a role in preventing looseness of the valve seat 3 and is also a spring seat of the spring 2. Under the condition that a certain pressure exists at the oil end of the piston type energy accumulator, because the steel ball 4 and the valve seat 3 are linear seals between metals, a tiny amount of hydraulic oil (or other media) leaks inevitably, and the tiny amount of leakage is accumulated in a groove between two seals of the piston 6, so that the two seals are lubricated; meanwhile, the pressure of the annular groove 11 is not required to be too high, when the oil pressure in the annular groove 11 is higher than the pressure of the piston accumulator oil chamber 14, the pressure can push the steel ball 4 open, and the pressure can be released.
The utility model has the advantages that the design is reasonable, the structure is unique, and 1, the structure is small and exquisite, and the original design of each part of the piston type energy accumulator is not influenced; 2. the one-way valve 15 is made into a standard part, so that the cost is relatively low; 3. the piston lubricating and sealing device for the piston type energy accumulator can greatly prolong the service life of the piston type energy accumulator and bring corresponding social benefits.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. The utility model provides a piston lubrication sealing device for piston accumulator, includes the barrel and set up in piston in the barrel, the piston left side is the oil pocket in the barrel, its characterized in that: the piston is characterized in that a first support ring, a one-way seal, a two-way seal and a second support ring are sequentially arranged on the outer surface of the piston from left to right, an annular groove is formed between the one-way seal and the two-way seal, and a one-way valve is arranged between the oil cavity and the annular groove.
2. The piston lubrication seal for a piston accumulator according to claim 1, wherein: the check valve comprises a valve cover, a spring, a valve seat, a steel ball and a sealing ring, the valve seat is arranged in the piston, the steel ball is pressed on the valve seat by the spring, the sealing ring is arranged on the outer side of the valve seat, and the valve cover is arranged on the left side of the valve seat.
3. The piston lubrication seal for a piston accumulator according to claim 2, wherein: the piston is provided with a screw hole, the valve seat is arranged in the screw hole through threads, and the sealing ring is arranged between the piston and the valve seat.
4. The piston lubrication seal for a piston accumulator according to claim 2, wherein: one end of the spring props against the valve cover, and the other end of the spring props against the steel ball.
5. The piston lubrication seal for a piston accumulator according to claim 1, wherein: an air cavity is arranged in the cylinder, the oil cavity is arranged on the left side of the piston, and the air cavity is arranged on the right side of the piston.
6. The piston lubrication seal for a piston accumulator according to claim 1, wherein: the annular groove is used for storing lubricating oil, the closed volume is communicated with the oil cavity through the one-way valve, and the lubricating oil is provided for the one-way seal and the two-way seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024020.XU CN212899183U (en) | 2020-06-05 | 2020-06-05 | Piston lubricating and sealing device for piston type energy accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024020.XU CN212899183U (en) | 2020-06-05 | 2020-06-05 | Piston lubricating and sealing device for piston type energy accumulator |
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| Publication Number | Publication Date |
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| CN212899183U true CN212899183U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021024020.XU Active CN212899183U (en) | 2020-06-05 | 2020-06-05 | Piston lubricating and sealing device for piston type energy accumulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883122A (en) * | 2021-09-10 | 2022-01-04 | 无锡欧曼液压科技有限公司 | Novel ultrahigh-pressure clamp oil cylinder |
-
2020
- 2020-06-05 CN CN202021024020.XU patent/CN212899183U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883122A (en) * | 2021-09-10 | 2022-01-04 | 无锡欧曼液压科技有限公司 | Novel ultrahigh-pressure clamp oil cylinder |
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