阅读说明：本技术 一种缠绕式蓄能器 (Wound form energy storage ware ) 是由 张劲 于 2018-06-27 设计创作，主要内容包括：本发明公开了一种缠绕式蓄能器,包括蓄能器筒体,设置在筒体内的活塞,设置在筒体上方的气盖,以及设置在筒体下方的端盖；所述活塞将筒体分隔为上方的气腔和下方的油腔,所述气盖设有与气腔相通的气口,所述端盖设有与油腔相通的油口；所述活塞在油腔和气腔压力波动作用下在筒体内自由滑动,其初始压力来源于气腔内充入的有预定压力的惰性气体；所述气盖的上方设有上锁母,且所述气盖通过所述上锁母与筒体上方连接,所述气口上还设有充气阀。该蓄能器结构简单,加工方便,密封性能好,无工艺难点,安装设置便捷,可推广使用。(The invention discloses a wound energy accumulator, which comprises an energy accumulator cylinder, a piston arranged in the cylinder, an air cover arranged above the cylinder and an end cover arranged below the cylinder, wherein the piston is arranged in the cylinder; the piston divides the cylinder into an upper air cavity and a lower oil cavity, the air cover is provided with an air port communicated with the air cavity, and the end cover is provided with an oil port communicated with the oil cavity; the piston freely slides in the cylinder under the pressure fluctuation of the oil cavity and the air cavity, and the initial pressure of the piston is derived from the inert gas with preset pressure filled in the air cavity; the top of gas lid is equipped with the lock mother, just the gas lid passes through lock mother is connected with the barrel top, still be equipped with the inflation valve on the gas port. The energy accumulator has the advantages of simple structure, convenient processing, good sealing performance, no process difficulty, convenient installation and setting and popularization and application.)

1. A winding type energy accumulator comprises an energy accumulator cylinder (1), a piston (2), an air cover (3) and an end cover (4); an air cavity (5) and an oil cavity (6) are arranged in the cylinder body (1), an air port (31) communicated with the air cavity is formed in the air cover (3), and an oil port (41) communicated with the oil cavity is formed in the end cover (4); the air cover is characterized in that an upper locking nut (32) is arranged above the air cover (3), the air cover is connected with the upper part of the cylinder body through the upper locking nut, and an inflation valve (33) is further arranged on the air port (31); a lower lock nut (42) is arranged below the end cover (4), the end cover is connected with the barrel through the lower lock nut, and a circle of belleville spring (43) around the oil port is further arranged on the end cover; an upper reinforcing sleeve (11) matched with the upper lock nut (32) and a lower reinforcing sleeve (12) matched with the lower lock nut (42) are sleeved outside the cylinder body (1); a high carbon fiber winding layer is arranged on the cylinder body between the upper reinforcing sleeve (11) and the lower reinforcing sleeve (12); a supporting ring (23) and two-way sealing pieces (24) at two sides of the supporting ring are arranged between the piston (2) and the cylinder body (1), and the outer sides of the two-way sealing pieces between the piston and the cylinder body are respectively provided with a one-way Y-shaped sealing piece (25); the inner wall of the barrel body (1) is provided with three symmetrical buses, and the three buses are subjected to laser surface treatment and hardening; the air cavity (5) is connected with a pressure gauge; one side, close to the piston, of the end cover (4) is provided with an annular groove (44), and a sealing ring (45) is arranged in the annular groove; a boss (46) for preventing the sealing ring (45) from being punched out is further arranged on the inner wall of the opening of the annular groove (44); a circle of oil storage cavity (21) is arranged between one side of the piston (2) close to the air cover (3) and the cylinder, and a through-channel hole (22) used for communicating the air cavity is formed in the oil storage cavity.

2. A wound accumulator according to claim 1, characterized in that the upper and lower reinforcement sleeves (11, 12) are screwed to the cylinder (1).

3. A wound accumulator according to claim 1, characterized in that the cylinder (1) is a thin-walled aluminium alloy cylinder.

4. A wound accumulator according to any one of claims 1-3, characterized in that the cross-sections of the gas cover (3) and the end cover (4) are elliptical.

5. A wound accumulator according to claim 4, wherein the Y-shaped seal is of PTFE, Cu or stainless steel spring material.

Technical Field

The invention relates to an energy accumulator, in particular to a wound energy accumulator.

Background

The piston accumulator is a common isolated hydraulic capacity storage device in a hydraulic system, and has the functions of stabilizing system pressure, storing energy in the system and releasing the energy again when needed. The working principle is as follows: the piston separates the cylinder barrel into two parts, the upper part is filled with gas with certain pressure in advance, and the lower part is communicated with the hydraulic oil circuit through an oil port. When the system oil pressure rises, the hydraulic oil pushes the piston to move upwards to compress gas, the gas pressure rises, and after the gas pressure is balanced with the system oil pressure, the piston stops moving, and the accumulator finishes a liquid filling stage; when the oil pressure of the system is reduced, the gas pressure is higher than the oil pressure, the gas pushes the piston to move downwards, the energy accumulator supplements oil to the system through the oil port, the pressure of the system is maintained, and the energy accumulator finishes the liquid discharging stage. The pressure of oil in the accumulator changes as long as the system pressure changes, the piston moves along with the system pressure according to the force balance principle, and the accumulator repeatedly fills and discharges liquid so as to achieve the effect of storing and releasing hydraulic energy. A problem often encountered with piston accumulators during use is gas leakage. Gas leakage can be classified into external leakage of sealing structures such as end caps, inflation valves, and the like, and internal leakage of piston sealing structures. Currently, there are mature control techniques and methods for the control and inspection of external leaks, and no effective control techniques for internal leaks.

The gas permeability is higher than the liquid permeability, so the difficulty of sealing the gas is higher than that of sealing the hydraulic oil. When the energy accumulator is in a working state and the pressure fluctuates, the gas in the gas cavity leaks to the oil cavity; when the energy accumulator is in a standby state for a long time, the gas in the gas cavity can slowly leak to the oil cavity. The pressure of the air cavity is reduced due to the two kinds of leakage, so that the energy accumulator needs to be frequently inflated and supplemented with pressure, the gas pressure supplementing period is shortened, the use cost is increased, the reliability of the system is reduced, and the normal use of the piston type energy accumulator is influenced.

Disclosure of Invention

The invention aims to solve the technical problems and provides a winding type energy accumulator which is simple in structure, convenient to process, good in sealing performance, free of process difficulty, convenient to install and set and capable of being popularized and used.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a winding type energy accumulator comprises an energy accumulator cylinder, a piston, an air cover and an end cover; an air cavity and an oil cavity are arranged in the cylinder body, an air port communicated with the air cavity is arranged on the air cover, and an oil port communicated with the oil cavity is arranged on the end cover; the piston freely slides in the cylinder under the pressure fluctuation of the oil cavity and the air cavity, and the initial pressure of the piston is derived from the inert gas with preset pressure filled in the air cavity; an upper locking nut is arranged above the air cover, the air cover is connected with the upper part of the cylinder body through the upper locking nut, and an inflation valve is further arranged on the air port; a lower lock nut is arranged below the end cover, the end cover is connected with the barrel through the lower lock nut, and a circle of belleville spring wound around the oil port is further arranged on the end cover; an upper reinforcing sleeve matched with the upper locking nut and a lower reinforcing sleeve matched with the lower locking nut are sleeved outside the cylinder body; a high carbon fiber winding layer is arranged on the cylinder body between the upper reinforcing sleeve and the lower reinforcing sleeve; a supporting ring and two-way sealing pieces at two sides of the supporting ring are arranged between the piston and the cylinder, and a one-way Y-shaped sealing piece is arranged at the outer side of each two-way sealing piece between the piston and the cylinder; the inner wall of the cylinder body is provided with three symmetrical buses, and the three buses are subjected to laser surface treatment and hardening; the air cavity is connected with a pressure gauge; one side of the end cover, which is close to the piston, is provided with an annular groove, and a sealing ring is arranged in the annular groove; a boss for preventing the sealing ring from being punched out is further arranged on the inner wall of the opening of the annular groove; a circle of oil storage cavity is arranged between one side of the piston, which is close to the air cover, and the cylinder, and a through-channel hole for communicating the air cavity is formed in the oil storage cavity.

Preferably, the upper reinforcing sleeve and the lower reinforcing sleeve are in threaded connection with the cylinder body.

Preferably, the cylinder is a thin-wall aluminum alloy cylinder.

Preferably, the cross sections of the air cover and the end cover are both oval structures.

Preferably, the Y-shaped sealing element is made of polytetrafluoroethylene, copper and stainless steel spring materials.

Compared with the prior art, the invention has the following beneficial effects:

(1) the reinforcing sleeve is arranged at the thread part, so that the reinforcing sleeve can ensure that the energy accumulator does not deform during a pressure test and can prolong the fatigue life of the energy accumulator; and the design of the piston energy accumulator and the gland mode of the locking nut are adopted, so that the device is particularly suitable for the difficulty of assembling and disassembling the stainless steel threads.

(2) According to the invention, the thin-wall aluminum alloy cylinder is adopted to replace the traditional thick-wall alloy steel shell, the weight of the whole product is greatly reduced, and the high-carbon fiber winding layer is wound outside the cylinder, so that the bearing capacity of the product can be greatly improved, and the weight and the manufacturing cost of the product are reduced; moreover, the high-carbon fiber winding layer has the characteristics of light weight and corrosion resistance, so that the manufactured energy accumulator has the characteristics of high pressure resistance, corrosion resistance and light weight; in addition, the cylinder body adopts laser high-energy beams to carry out laser surface treatment and hardening along three symmetrical buses on the inner wall of the energy accumulator, so that the service life can be prolonged by more than 3 times, and the cylinder body has the advantage of long service life.

(3) The energy accumulator has the advantages that the moving stroke of the piston is larger, the allowable pressure fluctuation is larger, the butterfly spring is arranged at the bottom of the oil cavity, the energy accumulator can adapt to the working condition with frequent action, the butterfly spring can repeatedly deform to play a buffering role, the impact is reduced, the huge impact energy generated by the piston during unloading of a system can be absorbed by the butterfly spring, the use safety of the energy accumulator is ensured, and the service life of the energy accumulator is prolonged.

(4) The piston energy storage device can utilize the hydraulic oil in the oil storage cavity to seal the gas in the air cavity, so that the sealing performance of the piston energy storage device is improved; in addition, the Y-shaped sealing element made of the materials of polytetrafluoroethylene, bronze and stainless steel spring is adopted, the sealing effect is good, the problem of internal leakage of the piston type energy accumulator is solved, the gas pressure supplementing period is prolonged, the use cost is reduced, and frequent maintenance is not needed; in addition, the boss is arranged on the inner wall of the opening of the annular groove, so that the sealing ring can be effectively prevented from being punched out of the groove due to the action of external force, and the reliability and the stability of the whole energy accumulator are improved.

(5) The invention has simple structure, convenient processing, no process difficulty, convenient installation and setting and popularization and application.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

The purpose of this embodiment is to provide a wound accumulator, as shown in fig. 1, the accumulator includes an accumulator cylinder 1 made of thin-wall aluminum alloy, a piston 2 disposed in the cylinder, an air cap 3 disposed above the cylinder, and an end cap 4 disposed below the cylinder; the sections of the air cover 3 and the end cover 4 are both of an elliptical structure; the piston 2 divides the cylinder body 1 into an upper air cavity 5 and a lower oil cavity 6, the air cover 3 is provided with an air port 31 communicated with the air cavity, and the end cover 4 is provided with an oil port 41 communicated with the oil cavity; the piston 2 slides freely in the cylinder 1 under the pressure fluctuation of the oil chamber 6 and the air chamber 5, and the initial pressure of the piston is derived from the inert gas filled in the air chamber 5 and having the preset pressure. The air chamber 5 is connected with a pressure gauge.

An upper locking nut 32 is arranged above the air cover 3, the air cover is connected with the upper part of the cylinder body through the upper locking nut, and an inflation valve 33 is further arranged on the air port 31; a lower lock nut 42 is arranged below the end cover 4, the end cover is connected with the cylinder body through the lower lock nut, and a circle of belleville spring 43 wound around the oil port is further arranged on the end cover; an upper reinforcing sleeve 11 matched with the upper locking nut 32 and a lower reinforcing sleeve 12 matched with the lower locking nut 42 are sleeved outside the barrel 1; and a high carbon fiber winding layer is arranged on the cylinder body between the upper reinforcing sleeve 11 and the lower reinforcing sleeve 12. An annular groove 44 is arranged on one side of the end cover 4 close to the piston, and a sealing ring 45 is arranged in the annular groove. The inner wall of the opening of the annular groove 44 is also provided with a boss 46 for preventing the sealing ring 45 from being punched out.

A supporting ring 3 and two-way sealing pieces at two sides of the supporting ring are arranged between the piston 2 and the cylinder 1, and a one-way Y-shaped sealing piece is arranged at the outer side of each two-way sealing piece between the piston and the cylinder. The upper reinforcing sleeve 11 and the lower reinforcing sleeve 12 are in threaded connection with the cylinder body 1. The Y-shaped sealing element is made of polytetrafluoroethylene, copper and stainless steel springs. A circle of oil storage cavity 21 is arranged between one side of the piston 2 close to the air cover 3 and the cylinder body, and a communication hole 22 for communicating the air cavity is formed in the oil storage cavity.

The inner wall of the barrel body 1 is provided with three symmetrical buses, and the three buses are subjected to laser surface treatment and hardening.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.