Mechanical protection shaft end face oil seal

Abstract

The utility model provides a mechanical protection shaft end face oil seal, and belongs to the technical field of oil seals. The mechanical protection shaft end face oil seal comprises an annular shell and a sealing ring. The inner diameter of a circular ring of the circular-ring-shaped shell is in interference fit with a protective shaft of mechanical equipment, the inner edge of the circular ring of the circular-ring-shaped shell is bent towards the first side of the circular-ring-shaped shell to form a groove, a plurality of protrusions are arranged on the first side of the circular-ring-shaped shell, and the height of the protrusions is the preset height. The sealing ring comprises a connecting part and a lip part, the connecting part is arranged in the groove to connect the sealing ring with the annular shell, and the protrusions are located on one side of the lip part. According to the mechanical protection shaft end face oil seal, the phenomenon that when the mechanical protection shaft end face oil seal rotates at a high speed, the lip of the sealing ring collides between the annular shell and the protection shaft, and noise is generated can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal technical field especially relates to a mechanical protection shaft end surface oil seal. BACKGROUND

[0002] Oil seal is widely used in mechanical equipment because of its excellent sealing performance. First, as a closed sealing element, oil seal is essential in mechanical equipment, especially in parts that need lubricating oil to reduce friction and wear. It can ensure that lubricating oil does not leak, avoiding waste of oil and damage to the machine. Second, oil seal not only prevents lubricating oil from leaking, but also prevents dust, sand and other substances from entering the mechanical equipment, causing internal wear and damage to the machine, thereby shortening the service life of the mechanical equipment.

[0003] The mechanical equipment protection shaft end surface oil seal is arranged on the protection shaft of the mechanical equipment. The existing mechanical equipment end surface protection shaft includes a circular metal shell and a sealing ring arranged on one side of the circular metal shell. The sealing ring is fixedly connected with the metal shell. The sealing ring includes a connecting part connected with the circular metal shell and a lip part connected with the connecting part. After the mechanical equipment protection shaft end surface oil seal is connected with the protection shaft, the sealing ring lip part abuts against the protection shaft and forms a seal.

[0004] When the existing mechanical equipment protection shaft oil seal is used, one end of the lip part is connected with the connecting part, and the other end abutting against the protection shaft is a free end. Under the driving action of the high-speed rotation of the protection shaft, the mechanical equipment protection shaft oil seal also rotates, and at the same time, the free end of the lip part swings while rotating at high speed, collides back and forth between the protection shaft and the circular metal shell, producing a large noise. And with the long-time impact, the mechanical equipment protection shaft and the oil seal will be greatly damaged, affecting the service life of the mechanical equipment. SUMMARY

[0005] An object of the utility model is to solve the problem that the lip part of the sealing ring continuously collides back and forth between the protection shaft and the circular metal shell during use of the existing mechanical equipment protection shaft oil seal, producing a large noise and causing damage to the mechanical equipment.

[0006] In particular, the embodiments of the present application provide a mechanical equipment protection shaft end surface oil seal, comprising:

[0007] A circular shell, the circular inner diameter of the circular shell is interference connected with the protection shaft of the mechanical equipment, the circular inner edge of the circular shell is bent towards the first side of the circular shell and forms a groove, a plurality of protrusions are arranged on the first side of the circular shell, and the height of the protrusions is a preset height; and

[0008] The sealing ring comprises a connecting portion and a lip portion connected with the connecting portion, the connecting portion is arranged in the groove to connect the sealing ring with the annular shell, and a plurality of protrusions are arranged on one side of the lip portion.

[0009] Further, the outer edge of the annular shell is bent towards the first side to form a shielding portion, so that after the annular shell is mounted on the mechanical equipment protection shaft, an installation cavity is formed between the annular shell and the mechanical equipment.

[0010] Further, the protrusions are stamped on the annular shell.

[0011] Further, the plurality of protrusions are uniformly arranged along the circumference of the annular shell.

[0012] Further, the annular shell has a vertical portion perpendicular to the axis of the protection shaft, a guide portion is arranged between the vertical portion and the shielding portion, the guide portion is arranged at an obtuse angle with the vertical portion, and the guide portion is used for guiding the adhering objects adhered to the second side of the annular shell, the second side being the back side of the first side.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. A plurality of protrusions are arranged on the first side of the mechanical protection shaft end surface oil seal, and the plurality of protrusions are arranged on one side of the sealing ring lip portion, so that when the mechanical protection shaft end surface oil seal rotates at high speed, the air pressure on one side of the lip portion close to the annular shell is reduced, the free end of the lip portion tends to move towards one side close to the annular shell, the free end of the lip portion is prevented from swinging and impacting between the protection shaft and the annular shell, noise is avoided, and the height of the protrusions is set to a preset height, so that the sealing effect of the sealing ring is ensured.

[0015] 2. The protrusions are stamped on the annular shell, the production process and production cost of the mechanical protection shaft end surface oil seal are reduced, the overall quality of the mechanical protection shaft end surface oil seal is not increased, the burden of the protection shaft during rotation is avoided, and the power consumption of the mechanical equipment is increased.

[0016] 3. The protrusions are uniformly arranged along the circumference of the annular shell, so that the change of air flow rate is more uniform, the mechanical protection shaft end surface oil seal is prevented from vibrating due to uneven air flow rate during rotation, noise is avoided, and the connection firmness between the mechanical protection shaft end surface oil seal and the protection shaft is affected.

[0017] 4. The guide portion is arranged, dust and sand adhered to the second side of the mechanical protection shaft end surface oil seal are guided when being thrown out under the action of centrifugal force, and the dust and sand are prevented from entering the mechanical equipment to cause damage to the mechanical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Figure 1 is a structural diagram of a first side of a mechanical equipment protection shaft end face oil seal according to an embodiment of the present application;

[0019] Fig. 2 Figure 2 is a structural diagram of a second side of a mechanical equipment protection shaft end face oil seal according to an embodiment of the present application;

[0020] Fig. 3 Figure 3 is a sectional view of a mechanical equipment protection shaft end face oil seal according to an embodiment of the present application;

[0021] Fig. 4 Figure 4 is an exploded view of a sectional view of a mechanical equipment protection shaft end face oil seal according to an embodiment of the present application.

[0022] In the drawings:

[0023] 100 - mechanical protection shaft end face oil seal; 1 - circular ring-shaped shell; 2 - groove; 3 - shielding part; 4 - protrusion; 5 - sealing ring; 51 - connecting part; 52 - lip part; 6 - guide part; 7 - vertical part. DETAILED DESCRIPTION

[0024] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, and not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0026] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] As Figs. 1 to 4As shown, the mechanical protection shaft end face oil seal 100 of the utility model includes a circular ring shell 1 and a sealing ring 5. The center of the circular ring shell 1 is provided with a circular ring through hole, and the circular ring inner diameter of the circular ring through hole is in interference connection with a protection shaft (not shown) of a mechanical equipment. The circular ring inner edge of the circular ring shell 1 is bent to the first side of the circular ring shell 1 and forms a groove 2. A plurality of protrusions 4 are arranged on the first side of the circular ring shell 1, and the height of the protrusions 4 is a preset height. The sealing ring 5 includes a connecting part 51 and a lip part 52 connected with the connecting part 51, the connecting part 51 is arranged in the groove 2 to connect the sealing ring 5 with the circular ring shell 1, and the plurality of protrusions 4 are located on one side of the lip part 52.

[0028] The mechanical equipment is provided with a mounting hole for mounting the protection shaft, and after the protection shaft is mounted in the mounting hole, a gap exists between the protection shaft and the mounting hole. After the mechanical protection shaft end face oil seal 100 of the utility model is mounted on the protection shaft, the lip part 52 of the sealing ring 5 blocks the gap, and when oil extends from the gap between the mounting hole and the protection shaft, the oil is prevented from flowing out under the blocking of the lip part 52.

[0029] When the mechanical equipment starts and the protection shaft rotates, the oil seal is driven to rotate. Taking the air in the mounting cavity as a reference system, since the plurality of protrusions 4 are arranged on the first side of the circular ring shell 1, the air located outside the edge of the circular ring shell 1 in the mounting cavity flows across the plurality of protrusions 4, which is equivalent to extending the distance of air flow. In the case that the angular velocity of the protection shaft rotation is unchanged, the time for the air rotating shaft to move one circle is a certain value. In the case that the time of air flow is unchanged, the distance of air movement is extended, which is equivalent to accelerating the speed of air flow. Since the plurality of protrusions 4 are located on one side of the lip part 52, the speed of air flow on the side of the lip part 52 close to the circular ring shell 1 is accelerated. According to the relationship between air pressure and air flow rate, the air pressure on the side of the lip part 52 close to the circular ring shell 1 is small, and the air pressure on the side far away from the circular ring shell 1 is large. Under the action of atmospheric pressure, the free end of the lip part 52 has a tendency to move towards the side close to the circular ring shell 1. Therefore, the lip part 52 will not swing back and forth between the protection shaft and the circular ring shell 1, thereby generating noise and causing damage to the mechanical equipment. At the same time, in order to prevent the lip part 52 from being separated from the protection shaft and unable to form a sealing effect on the oil, the height of the protrusion 4 is set to a preset height. Specifically, the height of the protrusion 4 can be reasonably determined through experimental method under the condition that the protection shaft rotates at a specific angle.

[0030] In one embodiment, the edge of the circular ring shell 1 is bent to the first side to form a blocking part 3, so that after the circular ring shell 1 is mounted on the protection shaft of the mechanical equipment, a mounting cavity is formed between the circular ring shell 1 and the mechanical equipment. By arranging the blocking part, dust and sand from the outside are prevented from entering the mounting cavity of the circular ring shell 1 and adhering to the gap between the protection shaft and the mechanical equipment.

[0031] The material of the annular shell 1 can be metal material or non-metal material such as plastic. Preferably, metal material should be used. On the one hand, the protective shaft generates a lot of heat when rotating at high speed, and when plastic is used, it is easy to melt under the action of high temperature. On the other hand, metal material has good heat conduction performance, which can quickly conduct the heat generated by the high-speed rotation of the protective shaft, avoid affecting the heat dissipation of the mechanical equipment due to the setting of the mechanical protective shaft end face oil seal 100, and make the performance of the mechanical equipment better.

[0032] In one embodiment, the protrusion 4 is fixed on the first side of the annular shell 1 by welding. In another embodiment, the protrusion 4 is formed by stamping the annular shell 1. By stamping the annular shell 1, the protrusion 4 is formed on the first side of the annular shell 1. Compared with fixing the protrusion 4 on the first side of the annular shell 1 by welding, forming the protrusion 4 on the first side of the annular shell 1 by stamping has two advantages. First, by stamping instead of welding, the process complexity is reduced, production is facilitated, and production cost is reduced. Second, without additional welding, production materials are reduced, and production cost is also reduced. Finally, forming the protrusion 4 by additional welding increases the weight of the mechanical protective shaft end face oil seal 100, increases the burden of the rotating shaft when rotating, and increases the power consumption of the mechanical equipment when running. By stamping the protrusion 4, the weight of the mechanical protective shaft end face oil seal 100 does not change, and does not cause the loss of the mechanical equipment when running.

[0033] The setting method of the protrusion 4 on the first side of the annular shell 1 includes various methods. In one embodiment, the protrusion 4 is arranged at any position of the annular shell 1, and different protrusions 4 have different distances from the center of the annular shell 1. In another embodiment, a plurality of protrusions 4 are uniformly arranged along the circumference of the annular shell 1, so that the change of air flow rate is more uniform, avoiding vibration and noise of the mechanical protective shaft end face oil seal 100 during rotation due to uneven air flow rate, and affecting the connection firmness between the mechanical protective shaft end face oil seal 100 and the protective shaft.

[0034] In one embodiment, the circular ring-shaped shell 1 has a vertical part 7 perpendicular to the axis of the protection shaft, and a guide part 6 is arranged between the vertical part 7 and the shielding part 5, the guide part 6 is arranged at an obtuse angle with the vertical part 7, for guiding the adhering objects adhering to the second side of the circular ring-shaped shell 1, the second side is the back side of the first side. The second side of the mechanical protection shaft end face oil seal 100 is the side exposed to the outside, so the second side of the mechanical protection shaft end face oil seal 100 is easy to adhere to more dust and sand. By arranging the guide part 6, when the mechanical protection shaft end face oil seal 100 rotates at high speed, under the action of centrifugal force, with the guidance of the guide part 6, the dust and sand are thrown to the side of the mechanical protection shaft end face oil seal 100, avoiding the dust and sand entering the internal part of the mechanical equipment, causing damage to the mechanical equipment.

[0035] The above-mentioned embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A mechanical guard shaft end face oil seal characterized by, The application relates to a sealing ring and a circular ring-shaped shell. The circular ring-shaped shell is connected with a protective shaft of a mechanical device in an interference fit, the inner edge of the circular ring-shaped shell is bent towards the first side of the circular ring-shaped shell and forms a groove, a plurality of protrusions are arranged on the first side of the circular ring-shaped shell, and the height of the protrusions is a preset height. The sealing ring comprises a connecting part and a lip part connected with the connecting part, the connecting part is arranged in the groove to connect the sealing ring with the circular ring-shaped shell, and a plurality of protrusions are arranged on one side of the lip part.

2. The mechanically protected shaft end face oil seal of claim 1, wherein, The outer edge of the circular ring-shaped shell is bent towards the first side to form a shielding part, so that an installation cavity is formed between the circular ring-shaped shell and the mechanical device after the circular ring-shaped shell is installed on the protective shaft of the mechanical device.

3. The mechanically protected shaft end face oil seal of claim 1 wherein, The protrusions are formed by stamping the circular ring-shaped shell.

4. The mechanically protected shaft end face oil seal of claim 1 wherein, The protrusions are uniformly arranged along the circumference of the circular ring-shaped shell.

5. The mechanically protected shaft end face oil seal of claim 2 wherein, The circular ring-shaped shell has a vertical part perpendicular to the axis of the protective shaft, a guide part is arranged between the vertical part and the shielding part, the guide part is arranged at an obtuse angle with the vertical part, and the guide part is used for leading out attachments attached to the second side of the circular ring-shaped shell, the second side is the back side of the first side.

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