Shaft forging with wear-resistant structure

Abstract

The utility model relates to the field of shaft forgings, in particular to a shaft forging with a wear-resistant structure. The shaft forging with the wear-resistant structure comprises a shaft body, the inner side of the shaft body is of a hollow structure, and the hollow structure is a cylindrical cavity. Wherein the outer surface of the shaft body is coated with a wear-resistant layer, and the wear resistance of the shaft body can be improved through friction resistance; sealing pieces are arranged at the two ends of the outer side of the shaft body, external impurities can be prevented from entering the shaft body through the sealing pieces, and the surface of the shaft body is protected. According to the shaft forge piece with the wear-resistant structure, the wear-resistant layer composed of the base layer and the composite wear-resistant coating is arranged, the base layer is made of nichrome and is tightly combined with the shaft body through the thermal spraying technology, and the adhesive force between the composite wear-resistant coating and the shaft body is enhanced; the ceramic particles and the metal-based binding phase in the composite wear-resistant coating are reasonably matched, so that the wear resistance of the shaft forgings is remarkably improved, and the service life of the shaft forgings is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of shaft forgings, especially to a shaft forging with wear-resistant structure. BACKGROUND

[0002] Shaft forgings are key components in mechanical transmission systems and are widely used in various mechanical equipment. In actual work processes, shaft forgings often face complex working environments, and wear is one of the important factors affecting their service life and working performance. For example, in some industrial production equipment, shaft forgings need to move relative to other components for a long time, and frequent friction can cause wear on the surface of the shaft forgings, which not only reduces the dimensional accuracy of the shaft but also may cause equipment operation failure, increasing maintenance costs and downtime. Currently, common methods to improve the wear resistance of shaft forgings mainly include selecting materials with high hardness and good wear resistance, and heat treating or surface coating the shaft surface. However, simply selecting high-cost wear-resistant materials can significantly increase production costs, and the comprehensive performance of the materials may not fully meet the actual use requirements. Although conventional heat treatment can improve the hardness of the shaft surface to some extent, it has limited wear protection effect under harsh working conditions such as heavy load and high speed.

[0003] Therefore, it is necessary to provide a new shaft forging with wear-resistant structure to solve the above technical problems. SUMMARY

[0004] To overcome the defects of the prior art, a shaft forging with wear-resistant structure is provided to solve the above problems.

[0005] The shaft forging with wear-resistant structure provided by the utility model comprises a shaft body, the inner side of the shaft body is in a hollow structure, and the hollow structure is a cylindrical cavity, a wear-resistant layer is coated on the outer surface of the shaft body, and the wear-resistant layer can improve the wear resistance of the shaft body through wear resistance, sealing elements are arranged at the two ends of the outer side of the shaft body, and the sealing elements can prevent foreign matter from entering and protect the surface of the shaft body.

[0006] Preferably, the wear-resistant layer comprises a base layer and a composite wear-resistant coating, and the composite wear-resistant coating is coated on the outer surface of the base layer.

[0007] Preferably, the base layer is made of nickel-chromium alloy material.

[0008] Preferably, the composite wear-resistant coating is composed of ceramic particles and a metal-based bonding phase.

[0009] Preferably, the sealing element comprises two sealing rings, the two sealing rings are respectively located at the two ends of the outer side of the shaft body, annular grooves are formed at the two ends of the outer side of the shaft body, and the sealing rings are installed in the annular grooves.

[0010] Preferably, the shaft body has a plurality of oil grooves distributed along the axial direction, and the oil grooves are connected to the annular grooves at both ends of the shaft body.

[0011] Compared with related technologies, the shaft forgings with wear-resistant structures provided by this utility model have the following advantages:

[0012] Beneficial effects:

[0013] This invention features a wear-resistant layer consisting of a base layer and a composite wear-resistant coating. The base layer is made of nickel-chromium alloy and is tightly bonded to the shaft body through a thermal spraying process, which enhances the adhesion between the composite wear-resistant coating and the shaft body. The reasonable combination of ceramic particles and metal matrix binder phase in the composite wear-resistant coating significantly improves the wear resistance of shaft forgings and effectively extends their service life.

[0014] This utility model, through the annular grooves set at both ends of the shaft and the sealing rings installed inside, can prevent external impurities from entering and protect the surface of the shaft. At the same time, the oil groove is connected to the annular groove, ensuring good lubrication conditions and further improving the wear resistance of the shaft. Moreover, the structure is reasonably designed and has good economy and practicality. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of a shaft forging with a wear-resistant structure provided by this utility model;

[0016] Figure 2 for Figure 1 The diagram shows the structure of the wear-resistant layer.

[0017] Figure 3 for Figure 1 The diagram shows the structure of the seal.

[0018] The following are the labels in the diagram: 1. Shaft body; 2. Base layer; 21. Composite wear-resistant coating; 3. Sealing ring; 31. Annular groove; 32. Oil groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] The utility model discloses an axle forging with wear -resisting structure provided in the embodiment, and the axle forging with wear -resisting structure comprises: axle body 1, the inside hollow structure of axle body 1, and the hollow structure is cylindrical cavity, wherein, the outer surface of axle body 1 is coated with wear -resisting layer, and the wear resistance of axle body 1 can be improved through wear resistance, the both ends of the outside of axle body 1 are provided with sealing element, and the surface of axle body 1 can be prevented from entering the outside impurity through sealing element, protection.

[0022] It should be noted that: the inside hollow structure of axle body 1, and the hollow part is cylindrical cavity, hollow structure effectively reduces the material consumption required for manufacturing axle body 1, in some large mechanical equipment, axle body size is larger, adopts hollow structure to can significantly reduce the consumption of steel, brings considerable cost savings. And reduce the overall weight of axle body 1, for high-speed rotating axle parts, lighter weight means lower rotational inertia, so that the axle is more flexible in the process of starting, accelerating and decelerating. The wear -resisting layer coated on the outer surface of axle body 1 is the core structure of improving the wear resistance of axle, and the wear -resisting layer can significantly prolong the service life of axle body 1, reduce the size change and performance decline caused by wear, thereby improving the operation reliability of equipment, reducing equipment maintenance frequency and cost, the sealing element arranged at the both ends of the outside of axle body 1 plays a vital protective role. In actual working environment, dust, impurities and other pollutants often exist around the axle. The sealing element is installed at the both ends of axle body 1, which can effectively prevent these external impurities from entering the cooperation gap between axle body 1 and other components. Once the impurities enter the cooperation gap, in the process of axle rotation, the friction between the surface of axle and other components will be intensified, which will cause the surface of axle 1 to wear more seriously, and affect the normal operation and service life of the axle.

[0023] In the embodiment of the utility model, the wear -resisting layer includes base layer 2 and composite wear -resisting coating 21, and the composite wear -resisting coating 21 is coated on the outer surface of base layer 2, and the base layer 2 is made of nickel chromium alloy material, and the composite wear -resisting coating 21 is composed of ceramic particles and metal-based bonding phase.

[0024] It should be noted that the base layer 2 is tightly combined with the surface of the shaft body 1 through a thermal spraying process, the base layer 2 is made of nickel-chromium alloy material, in actual production, the surface of the shaft body 1 is pretreated to remove oil stains, impurities and the like, then the nickel-chromium alloy powder is heated to a molten state through a thermal spraying equipment, and is sprayed at high speed to the surface of the shaft body 1 to form the base layer 2, the base layer 2 is metallurgically combined with the surface of the shaft body 1, and the combined strength is high. The composite wear-resistant coating 21 is arranged on the outer surface of the base layer 2, the composite wear-resistant coating 21 is composed of ceramic particles and a metal-based bonding phase, the ceramic particles are uniformly dispersed in the metal-based bonding phase. The ceramic particles select tungsten carbide particles, and the metal-based bonding phase selects cobalt-based alloy, the uniformly mixed tungsten carbide particles and cobalt-based alloy powder are sprayed on the surface of the base layer 2 through a plasma spraying process to form the composite wear-resistant coating 21. The two can ensure the wear resistance while improving the impact resistance of the composite wear-resistant coating.

[0025] In the embodiment of the utility model, the sealing element includes two sealing rings 3, and the two sealing rings 3 are located at the two ends of the outer side of the shaft body 1, the two ends of the outer side of the shaft body 1 are provided with annular grooves 31, the sealing rings 3 are installed in the annular grooves 31, and the shaft body 1 is provided with a plurality of oil grooves 32 distributed along the axial direction, and the oil grooves 32 are communicated with the annular grooves 31 at the two ends of the shaft body 1.

[0026] It should be noted that the two ends of the shaft body 1 are provided with annular grooves 31, the sealing rings 3 are installed in the annular grooves 31, the sealing rings 3 are made of rubber material, during installation, the sealing rings 3 are embedded in the annular grooves 31 to ensure that the sealing rings 3 are tightly matched with the annular grooves 31 to play a good sealing effect. The sealing rings 3 can effectively prevent dust, impurities and the like from entering the gap between the shaft body 1 and other components, reduce the wear of the shaft body 1 caused by the friction of impurity particles, and also play a certain sealing effect of lubricating medium to ensure that the shaft body 1 works in a good lubricating environment and further improve the wear resistance of the shaft body 1. The shaft body 1 is provided with a plurality of oil grooves 32 distributed along the axial direction, the oil grooves 32 are communicated with the annular grooves 31 at the two ends of the shaft body 1, in actual use, the lubricating medium enters the annular grooves 31 through the oil inlets at the two ends of the shaft body 1, and then is evenly distributed on the surface of the shaft body 1 through the oil grooves 32 to provide good lubrication for the shaft body 1. The oil grooves 32 can store and transport the lubricating medium, so that the lubricating medium can be evenly distributed on the surface of the shaft body 1 during the rotation of the shaft body 1, a good lubricating film is formed, the friction coefficient between the shaft body 1 and other components is reduced, and the wear is reduced.

[0027] The working principle of the shaft forging with the wear-resistant structure is as follows: the wear-resistant layer is composed of a base layer 2 and a composite wear-resistant coating 21. The base layer 2 is made of nickel-chromium alloy material, and after the surface of the shaft body 1 is pretreated, the molten nickel-chromium alloy powder is sprayed at high speed to the surface of the shaft body, so that a dense base layer metallurgically combined with the surface of the shaft body is formed, and the adhesion between the composite wear-resistant coating and the shaft body is greatly enhanced. The composite wear-resistant coating 21 is composed of tungsten carbide ceramic particles uniformly dispersed in a cobalt-based metal-based bonding phase, and is covered on the surface of the base layer 2 by a plasma spraying process. The high hardness and high wear resistance of the tungsten carbide particles effectively resist external friction, the good toughness and bonding performance of the cobalt-based alloy ensure the integrity and stability of the composite wear-resistant coating, and the wear-resistant performance and impact resistance of the surface of the shaft body 1 are improved, the service life of the shaft body 1 is significantly prolonged, the size change and performance decline caused by wear are reduced, and the equipment operation reliability is improved. The sealing ring 3 made of rubber is installed in the annular groove 31 at the two ends of the outer side of the shaft body 1. When the equipment is running, the sealing ring 3 tightly fits the annular groove 31 to form an effective barrier to prevent external dust, impurities and other pollutants from entering the gap between the shaft body 1 and other components, avoid the impurity particles to aggravate the friction between the surface of the shaft body and other components, and thus reduce the wear of the shaft body 1. At the same time, the sealing ring 3 plays a certain sealing role on the lubricating medium. The oil groove 32 distributed along the axial direction of the shaft body 1 is connected with the annular groove 31 at the two ends, and the lubricating medium enters the annular groove 31 from the oil inlet at the two ends of the shaft body 1, and is uniformly distributed on the surface of the shaft body 1 through the oil groove 32, so that a good lubricating film is formed in the rotating process of the shaft body, the friction coefficient between the shaft body 1 and other components is reduced, the wear is further reduced, the shaft body 1 is ensured to work in a good lubricating environment, and the wear-resistant performance is improved.

[0028] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A shaft forging having a wear resistant structure, characterized by, Include: Shaft body (1); The inner side of the shaft body (1) is a hollow structure, and the hollow structure is a cylindrical cavity; Wherein, the outer surface of the shaft body (1) is coated with a wear-resistant layer, and the wear-resistant layer can improve the wear resistance of the shaft body (1) by resisting friction; The outer side of the shaft body (1) is provided with a sealing element, and the sealing element can prevent foreign matter from entering and protect the surface of the shaft body (1).

2. The shaft forging having a wear resistant structure according to claim 1, characterized by, The wear-resistant layer includes a base layer (2) and a composite wear-resistant coating (21), and the composite wear-resistant coating (21) is coated on the outer surface of the base layer (2).

3. The shaft forging having a wear resistant structure according to claim 2, characterized by, The base layer (2) is made of nickel-chromium alloy material.

4. The shaft forging having a wear resistant structure according to claim 3, characterized by, The composite wear-resistant coating (21) is composed of ceramic particles and metal-based bonding phase.

5. The shaft forging having a wear resistant structure according to claim 4, wherein, The sealing element includes two sealing rings (3), and the two sealing rings (3) are respectively located at the two ends of the outer side of the shaft body (1), the two ends of the outer side of the shaft body (1) are provided with annular grooves (31), and the sealing rings (3) are installed in the annular grooves (31).

6. The shaft forging having a wear resistant structure according to claim 5, wherein, A plurality of oil grooves (32) are arranged on the shaft body (1) and distributed along the axial direction, and the oil grooves (32) are communicated with the annular grooves (31) at both ends of the shaft body (1).

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