High-wear-resistant alloy part of hydraulic spring operating mechanism and wear-resistant alloy

Abstract

The invention discloses a high-wear-resistance alloy part of a hydraulic spring operating mechanism. The high-wear-resistance alloy part comprises a high-wear-resistance alloy energy storage piston cylinder and a high-wear-resistance alloy working cylinder. Meanwhile, the invention discloses a wear-resistant alloy for the key component of the hydraulic spring operating mechanism and a preparation method of the high-wear-resistant alloy component of the hydraulic spring operating mechanism. The high-wear-resistance alloy energy storage cylinder and the high-wear-resistance alloy working cylinder have six advantages that 1, the mechanical strength is improved; 2, high wear resistance; 3, the self-lubricating property is realized; 4, the thermal expansion coefficient is basically consistent with that of the piston rod; 5, an excellent vibration absorption function is achieved; and 6, the manufacturing process of key parts is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of hydraulic spring operating mechanism cylinder body machining technology, and in particular to a high wear-resistant alloy component and wear-resistant alloy for a hydraulic spring operating mechanism. Background Technology

[0002] Hydraulic spring operating mechanisms are an important component of high-voltage switches in power systems, mainly composed of energy storage elements, control elements, actuators, and auxiliary elements.

[0003] The actuator is the opening / closing piston rod, which performs work under the action of oil pressure in the piston cylinder, thereby driving the high-voltage switch to perform the closing or opening action. Similarly, the energy storage piston rod in the energy storage element performs work under the action of oil pressure in the energy storage cylinder to achieve the purpose of releasing the energy storage spring. Chinese invention patent application number CN201710018385.8 discloses a hydraulic cylinder, its manufacturing method, and a device using the hydraulic cylinder. The hydraulic cylinder includes an outer cavity and an inner cavity located inside the outer cavity. Both the inner and outer cavities are made of aluminum alloy. However, when this aluminum alloy was applied to an actual hydraulic spring operating mechanism, it was found that: the energy storage cylinder and the energy storage piston rod, and the piston cylinder and the opening / closing piston rod, caused scratches on the inner wall of the cylinder due to reciprocating friction; the energy storage cylinder and piston cylinder had low mechanical strength, making them prone to deformation and cracking; the different materials of the energy storage cylinder and the energy storage piston rod, and the piston cylinder and the opening / closing piston rod, resulted in significant differences in their coefficients of thermal expansion, leading to large deformations in harsh environments, reducing sealing performance, and causing oil leaks; furthermore, significant noise was generated during repeated operation. All these factors combined resulted in a very short service life for the energy storage cylinder and piston cylinder.

[0004] Due to the above-mentioned problems, the storage cylinder and piston cylinder are prone to damage, which shortens the normal service life of the hydraulic spring operating mechanism. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a high wear-resistant alloy component for a hydraulic spring operating mechanism. The high wear-resistant alloy energy storage cylinder and the high wear-resistant alloy working cylinder reduce the frictional resistance of the friction surface during relative motion, absorb vibration energy, and self-lubricate the friction surface.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A high wear-resistant alloy component for a hydraulic spring operating mechanism includes:

[0008] The high wear-resistant alloy energy storage cylinder is sleeved on the energy storage piston rod of the hydraulic spring operating mechanism and slides in cooperation with the energy storage piston rod. The energy storage piston rod slides and rubs against the inner wall of the high wear-resistant alloy energy storage cylinder through the wear-resistant ring.

[0009] The high wear-resistant alloy working cylinder is sleeved on the opening / closing piston rod of the hydraulic spring operating mechanism and slides in cooperation with the opening / closing piston rod. The opening / closing piston rod slides and rubs against the inner wall of the high wear-resistant alloy working cylinder through the wear-resistant ring.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] High wear-resistant alloy energy storage cylinders and high wear-resistant alloy working cylinders have six major advantages: 1. Improved mechanical strength; 2. High wear resistance; 3. Self-lubricating properties; 4. Thermal expansion coefficient is basically the same as that of the piston rod; 5. Excellent vibration absorption function; 6. Greatly simplified manufacturing process of key components.

[0012] More preferably, the high wear-resistant alloy energy storage cylinder and the high wear-resistant alloy working cylinder have the same matrix, which includes ferrite and graphite. The ferrite and graphite are fused together, and the graphite is distributed in a spherical shape inside the ferrite and on the friction surface. The graphite located on the friction surface of the ferrite is used to adsorb the lubricating oil in the high wear-resistant alloy energy storage cylinder and the high wear-resistant alloy working cylinder.

[0013] By adopting the above technical solution, the combination of graphite and ferrite can effectively absorb vibration energy, and the spherical graphite can better wet the friction surface, reduce frictional resistance, and enable the high wear-resistant alloy energy storage cylinder and the high wear-resistant alloy working cylinder to have good self-lubricating properties, thereby improving the dynamic sealing effect and high wear resistance between the high wear-resistant alloy energy storage cylinder and the energy storage piston rod, and between the high wear-resistant alloy working cylinder and the opening / closing piston rod.

[0014] This invention also discloses a wear-resistant alloy for a high wear-resistant alloy component of a hydraulic spring operating mechanism. The wear-resistant alloy is formed by crystallization and solidification of ductile iron in a water-cooled crystallizer. The components and mass percentages of the wear-resistant alloy are as follows:

[0015] Ferrite, 91.8%–93.76%.

[0016] Graphite, 3.1%–3.6%

[0017] Silicon, 2.9%–3.6%.

[0018] Copper, 0.2%–0.8%.

[0019] Tin, 0.01% to 0.06%.

[0020] Magnesium, 0.03%–0.06%.

[0021] Manganese, ≤0.4%.

[0022] Sulfur, ≤0.03%.

[0023] Phosphorus, ≤0.07%.

[0024] A further preferred embodiment is that the components and mass percentages of the wear-resistant alloy are: ferrite, 91.8%.

[0025] Graphite, 3.6.

[0026] Silicon, 3.6%.

[0027] Copper, 0.8%.

[0028] Tin, 0.06%.

[0029] Magnesium, 0.06%.

[0030] Manganese, 0.4%.

[0031] Sulfur, 0.03%.

[0032] Phosphorus, 0.07%.

[0033] Further optimization resulted in the following composition and mass percentage of the wear-resistant alloy: ferrite, 93.79%.

[0034] Graphite, 3.1%.

[0035] Silicon, 2.9%.

[0036] Copper, 0.2%.

[0037] Tin, 0.01%.

[0038] Magnesium, 0.03%.

[0039] Manganese, 0.4%.

[0040] Sulfur, 0.03%.

[0041] Phosphorus, 0.07%.

[0042] By adopting the above technical solution, the graphite in the wear-resistant alloy not only absorbs the vibration energy generated during the relative movement of the high wear-resistant alloy energy storage cylinder and energy storage piston rod, and the high wear-resistant alloy working cylinder and opening / closing piston rod, but also plays a role in lubricating the friction surfaces between the contact surfaces and reducing frictional resistance, giving the wear-resistant alloy self-lubricating properties. The mechanical strength of ferrite is strengthened by silicon solid solution, and the tensile strength of the wear-resistant alloy is not only well strengthened by copper and tin composite, but also the solidification structure is refined, the fluidity of molten iron is improved, and defects such as cold shut and incomplete casting are reduced. Ultimately, the forming quality of the high wear-resistant alloy energy storage cylinder and the high wear-resistant alloy working cylinder is optimized, thereby improving the service life of the hydraulic spring operating mechanism. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0044] Figure 2This is a partial structural schematic diagram of the wear-resistant alloy in Example 1.

[0045] Reference numerals in the attached diagram: 1-Working cylinder; 2-Storage cylinder; 3-Opening / closing piston rod; 4-Storage piston rod; 5-Ferrite; 6-Graphite; 7-Double anti-wear ring. Detailed Implementation

[0046] The following is in conjunction with the appendix Figures 1-2 The present invention will be further described in detail in Examples 1 and 2.

[0047] Example 1

[0048] A high wear-resistant alloy component for a hydraulic spring operating mechanism, such as Figure 1 As shown, it includes:

[0049] A high-wear-resistant alloy energy storage cylinder 2 is sleeved on the energy storage piston rod of the hydraulic spring operating mechanism and slides in cooperation with the energy storage piston rod 4. The energy storage piston rod 4 slides and rubs against the inner wall of the high-wear-resistant alloy energy storage cylinder 2 through a wear-resistant ring. It should be noted that the wear-resistant ring in this application is the double anti-wear ring 7 involved in patent application number 202510596087.1.

[0050] The high wear-resistant alloy working cylinder 1 is sleeved on the opening / closing piston rod 3 of the hydraulic spring operating mechanism and slides in cooperation with the opening / closing piston rod 3. The opening / closing piston rod 3 slides and rubs against the inner wall of the high wear-resistant alloy working cylinder 1 through the wear-resistant ring.

[0051] The high wear-resistant alloy energy storage cylinder 2 and the high wear-resistant alloy working cylinder 1 have six major advantages: 1. Improved mechanical strength; 2. High wear resistance; 3. Self-lubricating properties; 4. Thermal expansion coefficient is basically consistent with that of the piston rod; 5. Excellent vibration absorption function; 6. Greatly simplified manufacturing process of key components.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the high wear-resistant alloy energy storage cylinder 2 and the high wear-resistant alloy working cylinder 1 have the same base, including ferrite 5 and graphite 6. Ferrite 5 and graphite 6 are fused together. Graphite 6 is distributed in a spherical shape inside the ferrite 5 and on the friction surface. The graphite 6 located on the friction surface of the ferrite 5 is used to adsorb the lubricating oil in the high wear-resistant alloy energy storage cylinder 2 and the high wear-resistant alloy working cylinder 1.

[0053] The combination of graphite 6 and ferrite 5 can effectively absorb vibration energy. The spherical graphite 6 can better wet the friction surface and reduce frictional resistance, giving the high wear-resistant alloy energy storage cylinder 2 and the high wear-resistant alloy working cylinder 1 good self-lubricating properties. This improves the dynamic sealing effect and high wear resistance between the high wear-resistant alloy energy storage cylinder 2 and the energy storage piston rod 4, and between the high wear-resistant alloy working cylinder 1 and the opening / closing piston rod 3.

[0054] Example 2

[0055] This invention also discloses a wear-resistant alloy for a high wear-resistant alloy component of a hydraulic spring operating mechanism. The wear-resistant alloy is formed by crystallization and solidification of ductile iron in a water-cooled crystallizer. The components and mass percentages of the wear-resistant alloy are as follows: ferrite 5, 91.8%–93.76%; graphite 6, 3.1%–3.6%; silicon, 2.9%–3.6%; copper, 0.2%–0.8%; tin, 0.01%–0.06%; magnesium, 0.03%–0.06%; manganese, ≤0.4%; sulfur, ≤0.03%; phosphorus, ≤0.07%.

[0056] Specifically, in this embodiment, the components and mass percentages of the wear-resistant alloy are as follows: ferrite 5, 91.8%; graphite 6, 3.6%; silicon, 3.6%; copper, 0.8%; tin, 0.06%; magnesium, 0.06%; manganese, 0.4%; sulfur, 0.03%; and phosphorus, 0.07%.

[0057] Specifically, in this embodiment, the components and mass percentages of the wear-resistant alloy are as follows: ferrite 5, 93.79%; graphite 6, 3.1%; silicon, 2.9%; copper, 0.2%; tin, 0.01%; magnesium, 0.03%; manganese, 0.4%; sulfur, 0.03%; and phosphorus, 0.07%.

[0058] Specifically, in this embodiment, the components and mass percentages of the wear-resistant alloy are as follows: Ferrite 5, 92.78%; Graphite 6, 3.35%; Silicon, 2.9%; Copper, 0.2%; Tin, 0.01%; Magnesium, 0.03%; Manganese, 0.4%; Sulfur, 0.03%; Phosphorus, 0.07%.

[0059] The wear-resistant alloy contains graphite 6, which not only absorbs the vibration energy generated during the relative movement of the high wear-resistant alloy energy storage cylinder 2 and the energy storage piston rod 4, and the high wear-resistant alloy working cylinder 1 and the opening / closing piston rod 3, but also lubricates the contact surfaces to reduce frictional resistance, giving the wear-resistant alloy self-lubricating properties. The mechanical strength of the ferrite 5 is strengthened by silicon solid solution, and the copper-tin composite not only effectively strengthens the tensile strength of the wear-resistant alloy, but also refines the solidification structure, improves the fluidity of the molten iron, and reduces defects such as cold shuts and incomplete casting. Ultimately, this optimizes the forming quality of the high wear-resistant alloy energy storage cylinder 2 and the high wear-resistant alloy working cylinder 1, thereby improving the service life of the hydraulic spring operating mechanism.

[0060] 1. Improved mechanical strength; 2. High wear resistance; 3. Self-lubricating properties; 4. Thermal expansion coefficient basically consistent with piston rod; 5. Excellent vibration absorption function; 6. Greatly simplified manufacturing process of key components.

[0061] Combining Embodiment 1 and Embodiment 2, the energy storage piston cylinder and the working cylinder base of the hydraulic spring operating mechanism are made of high wear-resistant alloy to obtain high wear-resistant alloy energy storage cylinder 2 and energy storage piston cylinder 4. The performance and advantages of the two are analyzed as follows:

[0062] 1. Improved mechanical strength: High-wear-resistant alloys replace the aluminum alloy matrix used in traditional hydraulic spring operating mechanisms. Compared to aluminum alloys, high-wear-resistant alloys offer significantly improved mechanical properties, avoiding common usage risks such as deformation and cylinder cracking.

[0063] 2. High wear resistance: The high wear-resistant alloy material itself possesses superior wear resistance. The inner walls of the high wear-resistant alloy working cylinder 1 and the high wear-resistant alloy energy storage cylinder 2 are formed directly by precision machining of the high wear-resistant alloy. The inner wall of the cylinder contacts the non-metallic wear-resistant ring (double anti-wear ring 7) installed on the piston rod to form a dynamic friction pair, avoiding direct metal-to-metal contact between the piston rod and the inner wall of the cylinder. After tens of thousands of opening and closing life tests, measurements of the inner wall dimensions of the cylinder showed that the inner wall dimensions remained essentially unchanged, maintaining a good sealing effect.

[0064] 3. Self-lubricating property: The high wear-resistant alloy used in the matrix contains micro-spherical graphite. Graphite itself has strong lubricating properties. When there is a lack of grease between the double anti-wear rings 7 between the energy storage piston rod 4 and the high wear-resistant alloy energy storage cylinder 2, and between the double anti-wear rings 7 between the high wear-resistant alloy working cylinder 1 and the opening / closing piston rod 3, the graphite on the inner surface of the cylinder barrels of the high wear-resistant alloy working cylinder 1 and the high wear-resistant alloy energy storage cylinder 2 will play an important lubricating role. This not only ensures the wear resistance of the inner wall of the cylinder, but also prevents the friction between the piston rod and the cylinder barrel from increasing under the condition of lack of grease, avoiding unnecessary heat generation and ensuring the working efficiency of the mechanism.

[0065] 4. The coefficient of thermal expansion of the piston rod is basically the same as that of the piston rod. The high wear-resistant alloy used in the matrix and the material used to prepare the piston rod are both iron-based materials, and their coefficients of thermal expansion remain basically the same. When the ambient temperature changes, the radial dimensions of the opening / closing piston rod 3 and the high wear-resistant alloy working cylinder 1, and the energy storage piston rod 4 and the high wear-resistant alloy energy storage cylinder 2 change in the same way, ensuring that the fit clearance between them remains unchanged, thereby ensuring the sealing effect and dynamic friction effect.

[0066] 5. It has excellent vibration absorption function. The high wear-resistant alloy used in the base has better vibration absorption characteristics than the aluminum alloy material used in traditional hydraulic spring operating mechanisms. This characteristic is very necessary for hydraulic spring operating mechanisms because the action characteristics of hydraulic spring operating mechanisms are similar to metal-on-metal impact. When the high-speed moving piston rod hits the stop mechanism, it stops moving immediately. If the impact energy generated at this moment cannot be absorbed and suppressed by the base, it will have adverse consequences if it is transmitted to other parts of the mechanism or to high-voltage switch components.

[0067] 6. The manufacturing process of key components is greatly simplified. The inner walls of the high-wear-resistant alloy working cylinder 1 and the high-wear-resistant alloy energy storage cylinder 2 are formed directly by precision machining of the high-wear-resistant alloy. Compared with the aluminum alloy material used in traditional hydraulic spring operating mechanisms, the chrome plating process on the inner walls of the high-wear-resistant alloy working cylinder 1 and the high-wear-resistant alloy energy storage cylinder 2 is eliminated. Traditional metal inner surface electroplating is very time-consuming, thus greatly shortening the workpiece turnaround time and processing time, and avoiding the adhesion risk when electroplating different materials. Furthermore, if the working cylinder 1 and the energy storage cylinder 2 made of aluminum alloy operate in environments with large temperature differences, the difference in thermal expansion coefficients between aluminum alloy and metallic chromium can damage the adhesion of the chrome plating layer formed on the aluminum alloy surface, leading to the risk of plating peeling. However, the inner walls of the high-wear-resistant alloy working cylinder 1 and the high-wear-resistant alloy energy storage cylinder 2 do not have an electroplated layer, eliminating the defect of plating peeling and improving the reliability and service life of the mechanism.

[0068] This specific embodiment is merely an explanation of the invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of protection of this invention, they are protected by patent law.

Claims

1. A high wear-resistant alloy component for a hydraulic spring operating mechanism, characterized in that, include: A high wear-resistant alloy energy storage cylinder (2) is sleeved on the energy storage piston rod of the hydraulic spring operating mechanism and slides in cooperation with the energy storage piston rod (4). The energy storage piston rod (4) slides and rubs against the inner wall of the high wear-resistant alloy energy storage cylinder (2) through a wear-resistant ring. A high wear-resistant alloy working cylinder (1) is sleeved on the opening / closing piston rod (3) of the hydraulic spring operating mechanism and slides in cooperation with the opening / closing piston rod (3). The opening / closing piston rod (3) slides and rubs against the inner wall of the high wear-resistant alloy working cylinder (1) through a wear-resistant ring.

2. The high wear-resistant alloy component of the hydraulic spring operating mechanism according to claim 1, characterized in that, The high wear-resistant alloy energy storage cylinder (2) has the same base as the high wear-resistant alloy working cylinder (1). The base includes ferrite (5) and graphite (6). The ferrite (5) and the graphite (6) are fused together. The graphite (6) is distributed in a spherical shape inside the ferrite (5) and on the friction surface. The graphite located on the friction surface of the ferrite (5) is used to adsorb the lubricating oil in the high wear-resistant alloy energy storage cylinder (2) and the high wear-resistant alloy working cylinder (1).

3. A wear-resistant alloy for a high wear-resistant alloy component in the hydraulic spring operating mechanism of claim 1, characterized in that, Includes the following components and their mass percentages: Ferrite, 91.8%–93.76%; Graphite, 3.1%–3.6%; Silicon, 2.9%–3.6%; Copper, 0.2%–0.8%; Tin, 0.01% to 0.06%; Magnesium, 0.03%–0.06%; Manganese, ≤0.4%; Sulfur, ≤0.03%; Phosphorus, ≤0.07%.

4. The wear-resistant alloy of the high wear-resistant alloy component of the hydraulic spring operating mechanism according to claim 3, characterized in that, Includes the following components and their mass percentages: Ferrite, 91.8%; Graphite, 3.6; Silicon, 3.6%; Copper, 0.8%; Tin, 0.06%; Magnesium, 0.06%; Manganese, 0.4%; Sulfur, 0.03%; Phosphorus, 0.07%.

5. The wear-resistant alloy of the high wear-resistant alloy component of the hydraulic spring operating mechanism according to claim 3, characterized in that, Includes the following components and their mass percentages: Ferrite, 93.79%; Graphite, 3.1%; Silicon, 2.9%; Copper, 0.2%; Tin, 0.01%; Magnesium, 0.03%; Manganese, 0.4%; Sulfur, 0.03%; Phosphorus, 0.07%.

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