Welded energy accumulator capable of avoiding high-temperature damage of vibrating plate

Abstract

The utility model discloses a kind of welding type energy accumulators to avoid high-temperature damage of vibrating plate, and the problem of vibrating plate damage caused by welding high temperature in the manufacturing process of traditional welding type energy accumulator is improved.The energy accumulator includes upper cover, lower cover and the vibrating plate clamped therebetween, the upper cover lower outer side is equipped with ring platform, the lower cover upper part includes sleeve section and inner sunken section, sleeve section inner diameter is matched with upper cover outer diameter, inner sunken section is equipped with the positioning groove of accommodating vibrating plate edge sealing ring, ring platform and sleeve section form weld between them.Ring platform lower side and sleeve section upper side are respectively milled with corresponding upper sunken groove and lower sunken groove, form heat insulation heat dissipation channel, prolong heat conduction path, reduce heat transfer, protect vibrating plate from high-temperature damage.Vibrating plate center is equipped with thickened reinforcing part and optional nylon protective sheet, and durability is enhanced.The design effectively improves the sealing property, reliability and service life of energy accumulator, and is suitable for high-pressure hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a welded energy storage device that avoids high-temperature damage to the vibrating plate. Background Technology

[0002] An accumulator is an energy storage device that plays a crucial role in hydraulic systems. It primarily stores high-pressure fluid energy and releases it when needed, providing functions such as pressure stabilization, shock absorption, and energy replenishment. Traditional welded accumulators typically consist of an upper cover, a lower cover, and a vibrating plate sandwiched between them. The vibrating plate is often made of rubber or other flexible elastic materials to effectively separate the gas and liquid chambers and provide vibration damping.

[0003] In the prior art, several patents disclose the design and manufacturing methods of welded accumulators. For example, Chinese patent CN101879655B describes a welding production process for a diaphragm accumulator, which emphasizes controlling the workpiece temperature between 50-60°C during welding to avoid damage to the rubber diaphragm caused by high temperatures. This patent points out that excessively high welding temperatures directly affect the integrity of the diaphragm, but its solution mainly relies on precise temperature monitoring and process optimization, rather than fundamentally avoiding the heat effect from the structure. Similarly, US patent US4265389A discloses a method for welding a diaphragm assembly, in which the diaphragm and the housing are welded together after clamping to ensure assembly accuracy. However, this method still faces the potential risk of damage to the diaphragm edges from the welding heat source, especially the high-temperature zone generated near the welding interface, which may cause material softening or cracking.

[0004] While these existing technologies have optimized the welding process to some extent, welded accumulators still have several significant drawbacks in their manufacturing process. First, the welding operation inevitably generates localized high temperatures, which can affect the edge areas of the vibratory plate through heat conduction. The heat resistance limit of rubber vibratory plates is typically below 150-200°C; exceeding this temperature can lead to edge deformation, aging, embrittlement, or the formation of microcracks, thereby weakening the accumulator's sealing performance and vibration absorption capacity. Second, this thermal damage is not limited to the manufacturing stage and may amplify problems during subsequent use, such as accelerating the fatigue failure of the vibratory plate under high-temperature operating environments, causing system pressure fluctuations, sluggish response, or sudden leaks, affecting the reliability and safety of the hydraulic system.

[0005] These drawbacks not only increase production defect rates and maintenance costs but also pose potential safety hazards, especially in high-pressure hydraulic systems where damage to the vibratory plate could lead to system collapse or explosion. Therefore, there is an urgent need for an accumulator design that can effectively prevent damage to the vibratory plate from the high temperatures of welding, thereby improving product durability, manufacturing efficiency, and overall performance. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a welded accumulator that avoids high-temperature damage to the vibrating plate. By improving the accumulator structure, especially the structure around the vibrating plate, the position of the vibrating plate can be moved away from the weld joint, and the transmission of high welding temperature to the vibrating plate can be reduced, thus preventing high-temperature damage to the vibrating plate.

[0007] To achieve the above objectives, this application discloses a welded accumulator to avoid high-temperature damage to the vibrating plate, comprising an upper cover, a lower cover, and a vibrating plate disposed between the upper and lower covers. The lower part of the upper cover is cylindrical, and an annular platform is provided on the outer side of the lower part of the upper cover. The upper part of the lower cover includes an outer sleeve and an inner recessed section. The inner diameter of the outer sleeve is the same as the outer diameter of the upper cover, and the outer diameter of the outer sleeve is the same as the outer diameter of the annular platform on the upper cover. A positioning groove for accommodating the edge sealing ring of the vibrating plate is provided on the inner recessed section. The lower end face of the upper cover abuts against the vibrating plate. A weld is formed between the lower edge of the annular platform and the upper edge of the outer sleeve. An upper recessed groove is milled at intervals on the lower side of the annular platform, and a lower recessed groove is milled at intervals on the upper side of the outer sleeve. The number and position of the upper and lower recessed grooves correspond one-to-one.

[0008] Furthermore, the vibrating plate is located inside the lower cover, and the vibrating plate divides the interior of the upper and lower covers into a pressure chamber and a hydraulic oil chamber. The top of the upper cover is provided with an air filling / deleting hole communicating with the pressure chamber, and the bottom of the lower cover is provided with a hydraulic oil hole communicating with the hydraulic oil chamber. Furthermore, the positions of the air filling / draining hole and the hydraulic oil hole are provided with internal threads and / or external threads.

[0009] Furthermore, the inflation / deflation port is sealed by a threaded sealing pin.

[0010] Furthermore, the bottom center of the vibrating plate protrudes upwards, and a reinforcing part is provided on the top surface of the protrusion.

[0011] Furthermore, the thickness of the reinforcing part is at least twice the thickness of the vibrating plate body.

[0012] Furthermore, the reinforcing part is configured to have a protective sheet embedded or pasted in it.

[0013] Furthermore, the protective sheet is a nylon sheet. Compared with the prior art, the present invention achieves the following significant beneficial effects through its innovative structural design: Structural insulation effectively protects the vibratory plate: This invention physically separates the welding area from the vibratory plate installation area through an innovative structure where the upper part of the lower cover is divided into an outer sleeve section and an inner recessed section. The weld is located between the outermost ring platform and the outer sleeve section, while the vibratory plate is installed in the positioning groove of the inner recessed section. This design significantly increases the distance from the welding heat source to the edge of the vibratory plate, extends the heat conduction path, and fundamentally avoids direct damage to the vibratory plate from the high temperature of welding.

[0014] A heat dissipation structure is added to block heat transfer: corresponding upper and lower recessed grooves are milled on the welding contact surfaces, namely the ring platform and the outer sleeve section. These grooves form a discontinuous air insulation layer before welding and constitute heat dissipation channels during welding. They not only reduce the direct contact area between metals, effectively hindering heat conduction radially inward, but also increase the surface area in contact with air, accelerating heat dissipation in the welding area. This dual effect ensures that the heat transferred to the inner recessed section is significantly reduced, keeping the operating environment temperature of the vibrating plate far below the damage threshold of its material.

[0015] Enhanced product reliability and lifespan: By avoiding potential thermal damage to the vibratory plate during manufacturing, the vibratory plate is ensured to be in optimal performance condition upon leaving the factory. This directly improves the sealing performance and fatigue resistance of the accumulator, enabling it to remain stable and reliable under long-term high-pressure and high-frequency operating environments. This effectively extends the overall lifespan of the accumulator and reduces the risk of hydraulic system failures caused by accumulator failure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the energy storage device of this utility model.

[0018] Figure 2 This is a schematic cross-sectional view of the energy storage device of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the top cover of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the lower cover of this utility model.

[0021] In the diagram: 1. Top cover; 11. Ring platform; 12. Pressure chamber; 2. Bottom cover; 21. Outer sleeve section; 22. Inner recessed section; 23. Positioning groove; 24. Hydraulic oil tank; 3. Vibration plate; 31. Edge sealing ring; 32. Reinforcing part; 4. Air filling / deleting hole; 5. Hydraulic oil hole; 6. Upper recessed groove; 7. Lower recessed groove; 8. Sealing nail; 9. Weld. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4 This utility model provides a welded accumulator that avoids high-temperature damage to the vibrating plate, including an upper cover 1, a lower cover 2, and a vibrating plate 3 clamped and installed between the upper cover 1 and the lower cover 2.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, the upper cover 1 is bowl-shaped overall, with a cylindrical structure at the bottom for easy connection with the lower cover 2. An outwardly protruding annular platform 11 is integrally formed on the outer side of the lower part of the upper cover 1. This platform 11 provides a solid base for welding operations.

[0025] The structure of the lower cover 2 is one of the core innovations of this utility model. Its upper part is designed as a double-layered structure, including an outer sleeve 21 and an inner recessed section 22. The outer sleeve 21 is a cylindrical ring whose inner diameter matches the outer diameter of the cylindrical lower part of the upper cover 1, allowing the upper cover 1 to be inserted and initially positioned. The outer diameter of the outer sleeve 21 is the same as the outer diameter of the upper ring platform 11 of the upper cover 1, enabling a smooth and continuous outer surface to be formed after welding.

[0026] The recessed section 22 is located inside the outer section 21, and its top surface is lower than that of the outer section 21, forming a recessed area. An annular positioning groove 23 is machined on the top surface of the recessed section 22. The edge of the vibrating plate 3 has an integrally formed edge sealing ring 31, which is precisely embedded in the positioning groove 23, thereby achieving precise positioning and reliable sealing of the vibrating plate 3.

[0027] During assembly, the vibrating plate 3 is first placed on the inner recessed section 22 of the lower cover 2. Then, the upper cover 1 is inserted into the lower cover 2, and the lower end face of the upper cover 1 presses tightly against the sealing ring 31 of the vibrating plate 3, creating initial sealing pressure. At this time, the lower edge of the annular platform 11 of the upper cover 1 abuts against the upper edge of the outer sleeve section 21 of the lower cover 2, forming a weld joint 9. Welding operations such as laser welding or argon arc welding are performed at this joint, firmly welding the annular platform 11 and the outer sleeve section 21 together to form a permanent sealed outer shell.

[0028] To further prevent the enormous heat generated during welding from being transferred inwards, this invention also incorporates a special heat-insulating structure. For example... Figure 3-4 As shown, multiple recessed grooves 6 are formed on the lower surface of the ring platform 11 by milling or other machining methods, spaced apart along the circumference. Correspondingly, recessed grooves 7, corresponding in number and position to the recessed grooves 6, are also machined on the upper surface of the outer sleeve section 21 of the lower cover 2. When the upper cover 1 and the lower cover 2 are closed, these grooves together form a series of discontinuous gaps or air cavities at the welding interface. These gaps effectively reduce the heat conduction area between the metals and constitute thermal resistance, greatly hindering the conduction of heat from the weld to the inner recessed section 22. At the same time, these grooves also increase the surface area of ​​the welding area, which is conducive to the rapid dissipation of heat into the surrounding air, playing an auxiliary role in heat dissipation.

[0029] With the above structure, most of the high temperature generated at the welding point is confined to the outermost ring platform 11 and the outer sleeve section 21, and is effectively blocked and dissipated by the sinking structure. Only a very small amount of heat can be transferred to the inner sinking section 22, thereby ensuring that the vibrating plate 3 and its sealing ring 31 installed in the positioning groove 23 are always within a safe temperature range, and completely avoiding high temperature damage.

[0030] In this embodiment, the vibrating plate 3 serves as the core functional component, dividing the internal space of the accumulator into two independent chambers, upper and lower. The space inside the upper cover 1 forms the pressure chamber 12, used to store high-pressure gases such as nitrogen. A charging / draining hole 4 is located at the center of the top of the upper cover 1, communicating with the pressure chamber 12 for charging or depressurizing the accumulator. The charging / draining hole 4 may have internal threads, which are sealed by a sealing pin 7 with corresponding external threads and a sealing ring to ensure the airtightness of the pressure chamber 12.

[0031] The space inside the lower cover 2 constitutes the hydraulic oil reservoir 24. A hydraulic oil hole 5 is provided at the center of the bottom of the lower cover 2 for connecting to the external hydraulic system pipeline. This hydraulic oil hole 5 can also be provided with internal or external threads to accommodate different interface standards and facilitate integration with the hydraulic system.

[0032] To improve the durability of the vibratory plate 3, particularly at its central position opposite the hydraulic oil hole 5, several design optimizations have been implemented. The bottom central region of the vibratory plate 3 protrudes upwards, and a thickened reinforcing portion 32 is provided on the top surface of the protrusion. The thickness of this reinforcing portion 32 is preferably twice or more the thickness of the vibratory plate 3 body to enhance its resistance to hydraulic oil impact and wear. As a more preferred embodiment, the reinforcing portion 32 can also be laminated with a high-strength, wear-resistant protective sheet, such as a nylon sheet, by embedding or bonding. This protective sheet can effectively prevent the sharp edges of the hydraulic oil hole 5 from causing wear or puncture to the vibratory plate 3 during reciprocating motion, thereby significantly extending the service life of the vibratory plate 3.

[0033] The working principle of this invention is as follows: When the external hydraulic system pressure increases, hydraulic oil enters the hydraulic oil chamber 24 through the hydraulic oil hole 5, pushing the vibrating plate 3 upward and compressing the gas in the pressure chamber 12, thereby storing energy in the form of gas potential energy. When the system pressure decreases, the high-pressure gas in the pressure chamber 12 expands, pushing the vibrating plate 3 downward and squeezing the hydraulic oil back into the system, releasing energy and playing a role in stabilizing pressure or supplementing flow.

[0034] In summary, this utility model, through its ingenious structural design, separates the welding area from the vibratory plate installation area and adds a highly efficient heat dissipation and insulation structure, fundamentally solving the technical problem that the vibratory plate is easily damaged by high temperatures during the manufacturing process of traditional welded accumulators, and significantly improving the reliability, production efficiency and service life of the product.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a specific implementation of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A welded accumulator to avoid high-temperature damage to the vibrating plate, comprising an upper cover (1), a lower cover (2), and a vibrating plate (3) disposed between the upper cover (1) and the lower cover (2), characterized in that: The lower part of the cover body of the upper cover (1) is cylindrical, and an annular platform (11) is provided on the outer side of the lower part of the upper cover. The upper part of the cover body of the lower cover (2) includes an outer sleeve section (21) and an inner recessed section (22). The inner diameter of the outer sleeve section (21) is the same as the outer diameter of the upper cover (1), and the outer diameter of the outer sleeve section (21) is the same as the outer diameter of the annular platform on the upper cover (1). The inner recessed section (22) is provided with a positioning groove (23) for accommodating the edge sealing ring (31) of the vibration plate (3). The lower end face of the upper cover (1) abuts against the vibration plate (3). There is a weld between the lower edge of the annular platform (11) and the upper edge of the outer sleeve section (21). The lower side of the annular platform (11) is milled with an upper recessed groove (6) spaced apart, and the upper side of the outer sleeve section (21) is milled with a lower recessed groove (7) spaced apart. The number and position of the upper recessed groove (6) and the lower recessed groove (7) correspond one-to-one.

2. The welded accumulator according to claim 1, which avoids high-temperature damage to the vibrating plate, is characterized in that: The vibrating plate (3) is located inside the lower cover (2), and the vibrating plate (3) divides the interior of the upper cover (1) and the lower cover (2) into a pressure chamber (12) and a hydraulic oil chamber (24). The top of the upper cover (1) is provided with an air filling and emptying hole (4) that communicates with the pressure chamber (12), and the bottom of the lower cover (2) is provided with a hydraulic oil hole (5) that communicates with the hydraulic oil chamber (24).

3. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 2, characterized in that: The air inlet / outlet (4) and hydraulic oil inlet (5) are provided with internal and / or external threads.

4. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 3, characterized in that: The venting hole (4) is sealed by a threaded sealing pin.

5. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 1, characterized in that: The bottom center of the vibrating plate (3) protrudes upward, and a reinforcing part (32) is provided on the top surface of the protrusion.

6. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 5, characterized in that: The thickness of the reinforcing part (32) is at least twice the thickness of the vibrating plate (3) body.

7. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 5, characterized in that: The reinforcing part (32) is configured to have a protective sheet embedded or pasted in it.

8. A welded accumulator for avoiding high-temperature damage to the vibrating plate according to claim 7, characterized in that: The protective sheet is made of nylon.

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