CN213419528U - Plastic piston for energy accumulator and start-stop energy accumulator - Google Patents
Plastic piston for energy accumulator and start-stop energy accumulator Download PDFInfo
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- CN213419528U CN213419528U CN202022219328.6U CN202022219328U CN213419528U CN 213419528 U CN213419528 U CN 213419528U CN 202022219328 U CN202022219328 U CN 202022219328U CN 213419528 U CN213419528 U CN 213419528U
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Abstract
The utility model relates to a plastic piston for energy storage ware and open and stop energy storage ware. The plastic piston comprises a plastic piston body provided with a sealing ring, wherein the piston body comprises a piston skirt part, a diameter reduction part and a piston top, the diameter reduction part is connected with the piston top, a cavity structure is arranged inside the piston, a spring guide element is arranged in the cavity structure, the spring guide element and the piston top are integrally injection-molded, and the spring guide element is located in the diameter reduction part. Plastics piston total light in weight, preparation cost are low for the energy storage ware, when the piston carries out reciprocating motion in the energy storage ware is inside, noiselessness and metal debris's production.
Description
Technical Field
The utility model relates to a hydraulic pressure auxiliary component field, concretely relates to plastic piston for energy storage ware and open and stop the energy storage ware.
Background
The piston type energy accumulator belongs to one of hydraulic isolation type energy accumulators, is an important auxiliary element in a hydraulic system, and has very obvious effects on aspects of assisting a power supply, absorbing pulsation, reducing noise, emergently powering a source, absorbing hydraulic impact and the like.
The piston type energy accumulator structure mainly comprises three main bodies, namely a piston, a cylinder barrel and an end cover (an oil port end and an exhaust end), wherein an oil side connecting flange and an air side connecting port are fixed at two ends of the cylinder barrel. The oil side connecting flange is provided with an oil hole, and the gas side connecting port is provided with an exhaust nozzle. The piston is made of cast iron, forged steel, cast steel or aluminum alloy and has one non-return valve in one end, two shaft sleeves of different widths and one sealing ring for sealing. However, the piston for the accumulator made of metal has the following problems mainly in the working process:
(1) during the reciprocating motion of the metal piston, metal scraps can be generated by the friction between the metal piston and the spring;
(2) the metal piston and the spring contact with each other and reciprocate, so that relatively large noise is generated;
(3) the metal piston, especially the aluminum piston, has higher preparation cost;
(4) when the metal piston and the spring reciprocate in the cylinder barrel, the guidance performance between the piston and the spring is poor, and the spring cannot obtain stable displacement stress;
(5) the metal piston has high weight, and when reciprocating motion is carried out in the cylinder barrel, two shaft sleeves are required to provide guidance and abrasion resistance;
(6) the piston type energy accumulator using the metal piston has poor working stability and short service life.
Disclosure of Invention
In order to improve guidance quality between used piston of piston energy storage ware and the spring, reduce the gross weight of piston, reduce the preparation cost, when avoiding the piston at cylinder body reciprocating motion, produce noise and metal piece, the utility model provides a set up spring guide element in diameter reduction portion and with the integrative injection moulding's in piston top plastic piston and use plastic piston opens and stops the energy storage ware.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: the utility model provides a plastic piston for energy storage ware, is including the plastic piston body that is equipped with the sealing washer, the piston body includes piston skirt portion, diameter reduction portion, piston top, diameter reduction portion is connected with the piston top, the inside cavity structure that is of piston, be equipped with spring guide element in the cavity structure, spring guide element with the integrative injection moulding in piston top, spring guide element is located diameter reduction portion.
Further, the difference between the inner diameter of the piston body and the inner diameter of the diameter reduction part is 3.37-4.42 mm.
Furthermore, an annular bulge is integrally arranged on the piston skirt, and the annular thickness of the annular bulge is 0.25-0.5 mm. Wherein, the annular bulge plays a guiding and anti-wear role in the reciprocating motion process of the plastic piston.
Preferably, a bezier curved surface is connected between the piston crown and the reduced diameter portion.
Further, the top of the piston is provided with an annular groove, and the sealing ring is arranged in the annular groove.
Preferably, the piston crown is provided with a dome-like structure and a disc surface integrally provided with the dome-like structure. The design of the dome-shaped structure can optimize the distribution of force and eliminate stress concentration.
Preferably, the disc surface is divergently provided with a plurality of banner structures by taking a round point as a center. The arrangement of the scroll structure can increase the overall rigidity of the plastic piston.
Preferably, the plastic piston is made of nylon 46. When the material of the plastic piston is nylon 46, the service life of the plastic piston is best, and the high temperature resistance, the low temperature resistance and the impact resistance are best.
The utility model also provides a start and stop energy storage ware, including energy storage ware aluminium system shell, foretell arbitrary plastic piston, end cover, big spring, little spring, plastic piston sets up inside aluminium system shell, and inside big spring was located to the little spring housing, spring guide element on big spring, little spring one end and the plastic piston is connected fixedly, the other end with the end cover is connected fixedly, the end cover passes through the screw connection with aluminium system shell and fixes.
Compared with the prior art, the utility model have following advantage and effect:
1. plastic piston through set up the diameter reduction portion that the diameter is less than the piston body, be fixed in inside the cyclic annular indentation structure that diameter reduction portion formed spring one end. Since the annular setback has a uniform wall thickness and a smaller diameter, a better guiding action of the spring and a better displacement force are provided.
2. Plastic piston through with spring guide element and piston top bottom an organic whole injection moulding. Compared with the traditional metal piston, because the spring guide element is made of plastic materials, when the piston and the spring do reciprocating motion in the cylinder barrel, no metal debris is generated, no friction noise between metal and metal occurs, and the whole reciprocating motion is stable, mild and free of noise pollution.
3. Plastic piston gross weight is lighter, and when the piston carried out reciprocating motion in the energy storage ware cylinder, an annular arch (being equivalent to current bearing) through integrative setting can realize leading and wear-resisting to the piston. Compared with the existing metal piston which needs two shaft sleeves, the method reduces the assembly procedures and reduces the production cost.
4. Use plastic piston open and stop the energy storage ware, all improve to some extent in the aspect of job stabilization nature, life, energy storage performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic sectional structure view of a plastic piston for an energy accumulator according to the present invention.
Fig. 2 is a top view of the plastic piston for an accumulator according to the present invention.
Fig. 3 is a cross-sectional view of the start/stop accumulator according to the present invention.
Fig. 4 is the utility model discloses open and stop components of a whole that can function independently structural schematic of energy storage ware.
Description of reference numerals: 1. a plastic piston body; 2. a piston skirt; 3. a piston top; 4. a diameter reducing part; 5. a spring guide element; 6. an annular groove; 7. a dome-like structure; 8. a disc surface; 9. an annular projection; 10. a banner structure; 11. an aluminum housing; 12. an end cap; 13. a screw; 14. a large spring; 15. a small spring.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention.
Example 1: as shown in fig. 1, a plastic piston for an energy accumulator comprises a plastic piston body 1, wherein the piston body 1 comprises a piston top 3, a diameter reduction part 4 and a piston skirt part 2, the piston top 3 is connected with the diameter reduction part 4, a cavity structure is arranged inside the piston body 1, a spring guide element 5 is arranged in the cavity structure, the spring guide element 5 and the piston top 3 are integrally injection-molded, and the spring guide element 5 is arranged in an annular retraction structure formed by the diameter reduction part 4.
When the plastic piston described in this embodiment 1 reciprocates inside the energy accumulator, one end of the spring is connected to the spring guide member 5 disposed inside the diameter reducing portion, and the other end is connected to the end cap. Since the diameter reduction 4 has a uniform wall thickness and a smaller diameter, a better guiding action and displacement force are provided for the reciprocating movement of the spring.
In addition, in the embodiment 1, the spring guide member 5 is integrally injection-molded with the piston top 3, and when the piston and the spring reciprocate, the piston has no noise pollution and no metal debris compared with a metal piston.
As shown in fig. 1, an annular groove 6 is formed in the piston top 3, and a sealing ring is arranged in the annular groove 6 and used for sealing the piston body 1 in the reciprocating process.
Specifically, in the present embodiment 1, the difference between the inner diameter of the piston body 1 and the inner diameter of the diameter reduced portion 4 can be limited to be 3.37-4.42mm, and preferably 3.5 mm.
Further, as shown in fig. 1, an annular protrusion 9 is integrally formed on the piston skirt 2, and the annular protrusion 9 has a circumferential thickness of 0.25-0.5 mm. Wherein the annular protrusion 9 plays a role of guiding and resisting abrasion when the piston reciprocates. In this embodiment 1, since the piston body is made of plastic material, the overall weight is light, and therefore, the annular protrusion 9 is integrally formed, i.e., the two shaft sleeves with different widths in the metal piston can be replaced.
Example 2:
as shown in fig. 1 to 2, a plastic piston for an energy accumulator differs from embodiment 1 in that a bezier arc curved surface 16 is connected between the diameter reduced portion 4 and the piston crown portion 3, a dome-shaped structure 7 and a disc surface 8 integrally provided with the dome-shaped structure 7 are provided on the piston crown portion 3, and a plurality of spoke structures 10 are divergently provided on the disc surface 8 with a circular point as a center. The Bessel arc curved surface 16 is arranged to be beneficial to optimizing the displacement force when the piston reciprocates; the provision of the plurality of banner structures 10 may be used to increase the rigidity of the plastic piston.
Further, in the present embodiment 1 and embodiment 2, the material of the plastic piston is nylon 46. Wherein, the nylon 46 is polyamide 46 fiber with 60 percent of reinforced glass fiber, has higher crystallinity and abrasion rate, and can normally work at 150 ℃.
Example 3:
as shown in fig. 3 and 4, a start-stop energy accumulator includes an energy accumulator aluminum housing 11, and a plastic piston 1, an end cap 12, a large spring 14, and a small spring 15 described in embodiment 1 or embodiment 2, where the plastic piston is disposed inside the aluminum housing 11, the small spring 15 is sleeved inside the large spring 14, one end of the large spring 14 and one end of the small spring 15 are fixedly connected to a spring guide element 5 on the plastic piston, the other end of the large spring 14 and the other end of the small spring are fixedly connected to the end cap 12, and the end cap 12 is fixedly connected to the aluminum housing 11 by a screw 13.
The quality and performance of the plastic pistons for energy accumulators according to example 1 and example 2 and of the energy accumulator according to example 3 were analyzed by experiments as follows:
(1) and (3) cyclic durability test:
a) performing oil flushing, pressure maintaining and oil discharging circulation on a special rack by using 12 energy accumulator products;
b) the circulation frequency is 74 ten thousands times, and pollutants are applied to an oil tank of the rack at different stages of circulation to simulate the environment of the energy accumulator applied to the actual whole vehicle;
c) the energy accumulator product is required to have no function failure after 74 ten thousand cycles are completed;
d) after the operation is finished, the energy accumulator is dismantled, and the plastic piston in the energy accumulator is checked, so that the energy accumulator cannot be cracked or damaged.
(2) Static thermal environment experiment:
a) installing 6 energy accumulator products on a special tool and placing the special tool in a high-temperature environment temperature box; b) respectively pumping 3100KPA pressure oil into 6 energy accumulators through a special tool to form a pressure maintaining state;
b) setting the environment temperature box to 150 ℃, and preserving heat and pressure for 500 hours;
c) after the experiment is finished, the energy accumulator product cannot fail in function;
d) after the operation is finished, the energy accumulator is dismantled, and the plastic piston in the energy accumulator is checked, so that the energy accumulator cannot be cracked or damaged.
(3) Thermal shock test
a) Placing 6 energy accumulator products in an environment temperature box at minus 10 ℃ until the products are stable;
b) filling hot oil at 110 ℃ into the energy accumulator for 5 seconds, maintaining the pressure for 3 seconds, and continuing for 20 times;
c) repeating the steps a and b for 8 times;
d) the energy accumulator is required not to be blocked in each oil charging and discharging stage;
e) after the experiment is finished, the energy accumulator product cannot fail in function.
(4) Cold shock test
(a) Continuously using 2100Kpa hot oil at 110 ℃ to fill oil, maintain pressure and discharge oil for half an hour for 6 energy accumulator products;
b) spraying cold water at 2 +/-2 ℃ at the flow rate of 30 +/-18 l/mi for 60 seconds;
c) repeating the steps a and b for 8 times;
d) the energy accumulator is required not to be blocked in each oil charging and discharging stage;
d) after the experiment is finished, the energy accumulator product cannot fail in function.
To sum up, the utility model discloses a circulation endurance test, static hot environment experiment, thermal shock experiment, cold shock experiment have verified the reliability of plastic piston and energy storage ware. Through analysis experiment result, explain plastic piston and energy storage ware have life cycle length, long service life, resistant high low temperature, shock-resistant characteristics.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The utility model provides a plastic piston for energy storage ware, is including plastic piston body (1) that is equipped with the sealing washer, a serial communication port, piston body (1) is including piston skirt portion (2), diameter reduction portion (4), piston top (3), diameter reduction portion (4) are connected with piston top (3), the inside cavity structure that is of piston, be equipped with spring guide element (5) in the cavity structure, spring guide element (5) with piston top (3) an organic whole injection moulding, spring guide element (5) are located diameter reduction portion (4).
2. A plastic piston for an accumulator according to claim 1, characterized in that the difference between the inner diameter of the piston body (1) and the inner diameter of the diameter reduction (4) is 3.37-4.42 mm.
3. The plastic piston for an accumulator according to claim 1, characterized in that the piston skirt (2) is integrally provided with an annular protrusion (9), and the annular protrusion (9) has a circumferential thickness of 0.25-0.5 mm.
4. A plastic piston for an energy accumulator according to claim 2, characterized in that a bezier curve (16) is connected between the piston crown (3) and the diameter reduction (4).
5. A plastic piston for an energy accumulator according to claim 1 or 4, characterized in that the piston crown (3) is provided with an annular groove (6), the sealing ring being arranged in the annular groove (6).
6. A plastic piston for an energy accumulator according to claim 1, characterized in that the piston crown (3) is provided with a dome-like structure (7) and a disc surface (8) which is provided integrally with the dome-like structure (7).
7. A plastic piston for an accumulator according to claim 6, characterized in that the disc surface (8) is divergently provided with a plurality of spoke structures (10) centered around a circular point.
8. The plastic piston for an accumulator of claim 1, wherein the material of the plastic piston is nylon 46.
9. The utility model provides a start and stop energy storage ware, its characterized in that includes energy storage ware aluminium shell (11), any plastic piston, end cover (12), big spring (14), little spring (15) of claims 1 to 8, plastic piston sets up in aluminium shell (11) inside, and inside big spring (14) were located to little spring (15) cover, big spring (14), little spring (15) one end and the spring guide element (5) on the plastic piston are connected fixedly, the other end with end cover (12) are connected fixedly, end cover (12) are connected fixedly through screw (13) with aluminium shell (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022219328.6U CN213419528U (en) | 2020-09-30 | 2020-09-30 | Plastic piston for energy accumulator and start-stop energy accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022219328.6U CN213419528U (en) | 2020-09-30 | 2020-09-30 | Plastic piston for energy accumulator and start-stop energy accumulator |
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| Publication Number | Publication Date |
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| CN213419528U true CN213419528U (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022219328.6U Active CN213419528U (en) | 2020-09-30 | 2020-09-30 | Plastic piston for energy accumulator and start-stop energy accumulator |
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| CN (1) | CN213419528U (en) |
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