Anti-cracking device for high-ferrochrome equal-brittleness roller skin

Abstract

The utility model discloses an anti-cracking device for a high-ferrochrome equal-brittleness roller skin, which comprises connecting and fixing parts axially extending from annular end surfaces at two ends of the roller skin respectively, the connecting and fixing parts are cylindrical, and the outer diameter of each connecting and fixing part is smaller than that of the roller skin; the protective ring sleeves are arranged at the two ends of the roller skin, the protective ring sleeves wrap the outer ring surfaces of the connecting and fixing parts and the side ring surfaces of the connecting and fixing parts, and the toughness of the protective ring sleeves is higher than that of the roller skin. The two ends of the roller skin with concentrated stress are changed to be provided with the connecting and fixing parts, then the connecting and fixing parts are connected with the protective ring sleeve in a sleeved mode, the two ends of the roller skin are reinforced, the toughness of the protective ring sleeve is higher than that of the roller skin, meanwhile, the protective ring sleeve wraps the periphery of the roller skin, and stress deformation is mostly concentrated on the protective ring sleeve instead of the roller skin; if the protective ring sleeve is damaged, the probability of the protective ring sleeve is higher, and only the damaged protective ring sleeve needs to be replaced in time, so that the service life of the roller skin is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to a roller skin anti-cracking device, in particular to a roller skin anti-cracking device for brittle materials such as high-chromium iron. Background Art

[0002] Rollers are a commonly used component in the machinery industry. They are generally composed of a roller skin and a roller liner that are connected to each other. The roller skin and the roller liner are connected and fixed at both ends. The roller liner is connected to a drive device to drive the roller skin to rotate. During use, the roller skin needs to withstand a lot of friction and radial force, and the high-chromium iron material is very easy to wear due to its high hardness and brittleness. Especially at the two ends of the roller skin, due to the fixed connection with the roller liner, stress is concentrated and cracking is prone to occur. Once the end of the roller skin cracks, it is easy to cause the roller skin connection to loosen and further rupture, forming a safety hazard and unable to work normally. Therefore, even if the rest of the position is temporarily intact, it cannot continue to be used and must be replaced in time. High loss causes greater cost pressure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a device for preventing cracking of brittle roller skins such as high-chromium iron, which can effectively protect the roller skin and reduce the use cost.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A device for preventing cracking of brittle roller skins such as high-chromium iron is arranged at both ends of a cylindrical roller skin, and an annular connecting and fixing portion is extended axially from the end surfaces of both ends of the roller skin, and the outer diameter of the connecting and fixing portion is smaller than the outer diameter of the roller skin; a protective ring sleeve with a toughness higher than that of the roller skin is sleeved and fixed on the connecting and fixing portion, and the protective ring sleeve covers the outer ring surface and the side ring surface of the connecting and fixing portion.

[0006] As a preferred technical solution, the protective ring sleeve comprises an outer ring sleeve and a side ring sleeve which are connected to each other, and the outer ring sleeve and the side ring sleeve respectively cover the outer ring surface and the side ring surface of the connecting and fixing part.

[0007] As a preferred technical solution, the connecting and fixing part is centrally symmetrically located in the middle of the annular end surface of the roller skin end, and the inner diameter of the connecting and fixing part is larger than the inner diameter of the roller skin; the protective ring sleeve includes an outer ring sleeve, a side ring sleeve and an inner ring sleeve which are connected to each other in sequence, and the outer ring sleeve, the side ring sleeve and the inner ring sleeve respectively cover the outer ring surface, the side ring surface and the inner ring surface of the connecting and fixing part.

[0008] As a preferred technical solution, the inner diameter of the outer ring sleeve is interference fit with the outer ring surface of the connecting and fixing part, and reinforcing glue is provided between the protective ring sleeve and the connecting and fixing part.

[0009] Due to the adoption of the above technical solution, the two ends of the roller skin where the force was originally concentrated are replaced with connecting and fixing parts, and then the protective ring sleeve is sleeved through the connecting and fixing parts to reinforce the two ends of the roller skin. Since the toughness of the protective ring sleeve is higher than that of the roller skin and the protective ring sleeve is wrapped around the periphery of the roller skin, the stress deformation is more concentrated on the protective ring sleeve rather than the roller skin. If the protective ring sleeve is damaged, the probability of it being damaged is greater. It only needs to be replaced in time, which greatly improves the service life of the roller skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0011] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of the first embodiment of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the second embodiment of the utility model;

[0014] Figure 4 It is a cross-sectional schematic diagram of the second embodiment of the utility model;

[0015] Figure 5 It is a schematic diagram of the overall appearance of the utility model.

[0016] In the figure: 1-roller skin; 2-connecting and fixing part; 3-protective ring sleeve; 4-outer ring surface; 5-side ring surface; 6-outer ring sleeve; 7-side ring sleeve; 8-inner ring sleeve; 9-inner ring surface. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a device for preventing cracking of brittle roller skins such as high-chromium iron is arranged at both ends of a cylindrical roller skin 1, and an annular connecting and fixing portion 2 is axially extended from the end faces of both ends of the roller skin 1, and the outer diameter of the connecting and fixing portion 2 is smaller than the outer diameter of the roller skin 1; a protective ring sleeve 3 with a toughness higher than that of the roller skin 1 is sleeved and fixed on the connecting and fixing portion 2, and the protective ring sleeve 3 covers the outer ring surface 4 and the side ring surface 5 of the connecting and fixing portion 2.

[0019] The two ends of the roller skin 1 where the force was originally concentrated are replaced with connecting and fixing parts 2, and then the protective ring sleeve 3 is sleeved on the connecting and fixing parts 2 to reinforce the two ends of the roller skin 1. Since the toughness of the protective ring sleeve 3 is higher than that of the roller skin 1, and the protective ring sleeve 3 is wrapped around the outer periphery of the roller skin 1, the stress deformation is more concentrated on the protective ring sleeve 3 rather than the roller skin 1. If the protective ring sleeve 3 is damaged, the probability of damage is greater. The damaged protective ring sleeve 3 only needs to be replaced in time, which greatly improves the service life of the roller skin 1.

[0020] Figure 1 and Figure 2 The technical solution of the first embodiment of the utility model is shown. The protective ring sleeve 3 comprises an outer ring sleeve 6 and a side ring sleeve 7 connected to each other, and the outer ring sleeve 6 and the side ring sleeve 7 cover the outer ring surface 4 and the side ring surface 5 of the connecting and fixing part 2 respectively.

[0021] The size of the protective ring sleeve 3 matches the connection fixing part 2. When installed, the protective ring sleeve 3 is sleeved on the connection fixing part 2, and the outer ring sleeve 6 and the side ring sleeve 7 are respectively fitted with the outer ring surface 4 and the side ring surface 5 of the connection fixing part 2. The side of the outer ring sleeve 6 is against the annular end surface, and the protective ring sleeve 3 is tightly connected with the connection fixing part 2 as a whole, with an interference fit. The outer ring sleeve 6 and the side ring sleeve 7 transfer the stress on the surface of the connection fixing part 2 to the protective ring sleeve 3, helping the connection fixing part 2 resist deformation and preventing the connection fixing part 2 from deforming and cracking.

[0022] Figure 3 and Figure 4 The technical solution of the second embodiment of the utility model is shown. The connecting and fixing part 2 is centrally symmetrically located in the middle of the annular end surface of the end of the roller skin 1, and the inner diameter of the connecting and fixing part 2 is larger than the inner diameter of the roller skin 1; the protective ring sleeve 3 includes an outer ring sleeve 6, a side ring sleeve 7 and an inner ring sleeve 8 which are sequentially connected to each other, and the outer ring sleeve 6, the side ring sleeve 7 and the inner ring sleeve 8 respectively cover the outer ring surface 4, the side ring surface 5 and the inner ring surface 9 of the connecting and fixing part 2.

[0023] The inner diameter of the outer ring sleeve 6 is interference fit with the outer ring surface of the connecting and fixing part 2 , and reinforcing glue is provided between the protective ring sleeve 3 and the connecting and fixing part 2 .

[0024] The size of the protective ring sleeve 3 matches the connection and fixing part 2. During installation, the protective ring sleeve 3 is sleeved on the connection and fixing part 2. The outer ring sleeve 6, the side ring sleeve 7 and the inner ring sleeve 8 respectively fit the outer ring surface 4, the side ring surface 5 and the inner ring surface 9 of the connection and fixing part 2. The sides of the outer ring sleeve 6 and the inner ring sleeve 8 respectively abut against the annular end surface. The protective ring sleeve 3 is tightly connected to the connection and fixing part 2 as a whole, and has an interference fit. If necessary, glue reinforcement is performed. The outer ring sleeve 6, the side ring sleeve 7 and the inner ring sleeve 8 transfer the stress on the surface of the connection and fixing part 2 to the protective ring sleeve 3, helping the connection and fixing part 2 to resist deformation and prevent the connection and fixing part 2 from deforming and cracking. The inner ring sleeve 8 also enhances the surface strength of the connection and fixing part 2 and the roller liner, and enhances wear resistance.

[0025] The protective ring sleeve 3 may also adopt other structures that meet the requirements, such as an elastic hoop with an opening at one end, and the opening is connected by bolts.

[0026] When the toughness of the protective sleeve 3 is better than that of the roller skin 1 and it has the corresponding strength and wear resistance, the protective sleeve 3 can effectively absorb stress and protect the roller skin 1, thus achieving a good balance between protection effect and cost. If the protective sleeve 3 is too soft, the protection effect is poor and it is damaged quickly. If the protective sleeve 3 is too hard, it is not only too expensive but also easy to damage the roller skin 1.

[0027] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for preventing cracking of brittle roller skins such as high-chromium iron, which is arranged at both ends of a cylindrical roller skin, and is characterized in that: Annular connecting and fixing parts are respectively extended axially from the end surfaces at both ends of the roller skin, and the outer diameter of the connecting and fixing parts is smaller than the outer diameter of the roller skin; a protective ring sleeve with toughness higher than that of the roller skin is sleeved and fixed on the connecting and fixing parts, and the protective ring sleeve covers the outer ring surface and side ring surface of the connecting and fixing parts.

2. The device for preventing cracking of brittle roller skins such as high chromium iron as claimed in claim 1, characterized in that: The protective ring sleeve comprises an outer ring sleeve and a side ring sleeve which are connected to each other, and the outer ring sleeve and the side ring sleeve respectively cover the outer ring surface and the side ring surface of the connecting and fixing part.

3. The device for preventing cracking of brittle roller skins such as high chromium iron as claimed in claim 1 is characterized in that: The connecting and fixing part is centrally symmetrically located in the middle of the annular end surface of the roller skin end, and the inner diameter of the connecting and fixing part is larger than the inner diameter of the roller skin; the protective ring sleeve comprises an outer ring sleeve, a side ring sleeve and an inner ring sleeve which are connected to each other in sequence, and the outer ring sleeve, the side ring sleeve and the inner ring sleeve respectively cover the outer ring surface, the side ring surface and the inner ring surface of the connecting and fixing part.

4. The device for preventing cracking of brittle roller skins such as high chromium iron as claimed in claim 2 is characterized in that: The inner diameter of the outer ring sleeve is interference-fitted with the outer ring surface of the connecting and fixing part, and reinforcing glue is arranged between the protective ring sleeve and the connecting and fixing part.

Images