Follow-up oil block lock ring anti-drop structure

Abstract

The application discloses a follow-up oil baffle locking ring anti-dropping structure, which comprises a static outer oil baffle, a follow-up inner oil baffle and an oil baffle locking ring. The static outer oil baffle is in clearance fit with the follow-up inner oil baffle, the oil baffle locking ring is fastened with the follow-up inner oil baffle through locking screw teeth and is in sealing fit with the static outer oil baffle. A sliding groove is formed in the static outer oil baffle, a convex part embedded in the sliding groove is arranged on the oil baffle locking ring, a plurality of first magnets which are inclined and arranged in a ring array are arranged on the end face of the convex part, a plurality of second magnets are arranged on the groove bottom face of the sliding groove, each second magnet corresponds to each first magnet, and the second magnets and the corresponding first magnets are arranged in parallel spacing and opposite polarity, so that the oil baffle locking ring is given a thrust in the opposite direction of the rotation direction, and the locking screw teeth of the oil baffle locking ring and the follow-up inner oil baffle always keep the locking state. The above structure makes the overall structure of the oil baffle more stable and improves the sealing performance of the oil baffle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil baffle sealing, in particular to a follow-up oil baffle locking ring anti-falling structure. BACKGROUND

[0002] The oil baffle is installed on the bearing bush to prevent the leakage of lubricating oil and prevent foreign matter from entering the bearing interior to contaminate the lubricating oil. In the actual production process of a steam turbine, the middle split bolt of the floating oil baffle of the bearing bush may fall off during long-term operation, resulting in large vibration of the unit, cutting off of the bearing bush temperature out-of-limit line, etc.

[0003] In the existing structure, the follow-up inner oil baffle rotates together with the shaft through the locking ring, while the static outer oil baffle is generally installed on the cylinder body and is stationary, preventing the leakage of oil. After the equipment is operated, the follow-up inner oil baffle operates together with the rotor, and when the locking ring rubs against the static outer oil baffle, if the friction force is greater than the locking force of the locking screw, the locking ring will loosen and fall off, or even separate from the overall structure of the oil baffle. The fallen locking ring will rub against the rotor, and at the same time, the overall structure of the oil baffle is damaged, which reduces the sealing performance of the oil baffle, causes the leakage of lubricating oil or the water content in the bearing box exceeds the standard, and seriously affects the safe and stable operation of the equipment. SUMMARY

[0004] Based on the above problems, the purpose of the present application is to provide a follow-up oil baffle locking ring anti-falling structure to solve the problem that the follow-up inner oil baffle and its locking ring operate together with the rotor for a long time and are prone to serious friction, resulting in loosening or even falling off of the locking screw, damage to the overall structure of the oil baffle, and reduction in the sealing performance of the oil baffle.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] A follow-up oil baffle locking ring anti-falling structure, comprising a static outer oil baffle, a follow-up inner oil baffle and an oil baffle locking ring, the static outer oil baffle is gap-fitted with the follow-up inner oil baffle, the oil baffle locking ring is fastened with the follow-up inner oil baffle through locking screws and is sealingly fitted with the static outer oil baffle, wherein the static outer oil baffle is provided with a sliding groove, the oil baffle locking ring is provided with a protrusion embedded in the sliding groove, the end face of the protrusion is provided with a plurality of first magnets arranged in an inclined and annular array, the bottom surface of the sliding groove is provided with a plurality of second magnets, each second magnet corresponds to each first magnet, and the second magnets and the corresponding first magnets are arranged in parallel with the same polarity, thereby giving the oil baffle locking ring a thrust in the opposite direction of its rotation direction, so that the locking screw of the oil baffle locking ring and the follow-up inner oil baffle always remain in a locked state.

[0007] In particular, the first magnets are fixed at an inclination angle of 35° with respect to the normal of the end face of the protrusion.

[0008] Particularly, the first magnet and the second magnet repel each other only in the front face, and the back face is not interfered.

[0009] Particularly, the first magnet and the second magnet are boron-iron magnets.

[0010] Particularly, the inner ring surface of the convex part is embedded with the first sealing ring in frictional contact with the groove wall of the sliding groove.

[0011] Particularly, the bearing box and the rotor passing through the bearing box are further included, the stationary outer oil baffle is fixed on the bearing box, and the second sealing ring is embedded on the contact surface of the stationary outer oil baffle and the bearing box, and the follow-up inner oil baffle is fixed on the rotor, and the third sealing ring is embedded on the contact surface of the follow-up inner oil baffle and the rotor.

[0012] In summary, the beneficial effects of the present application are that the follow-up oil baffle locking ring anti-falling structure increases the magnetic repulsion force between the stationary outer oil baffle and the oil baffle locking ring, and forms a thrust force in the opposite direction of the rotor rotation direction on the oil baffle locking ring, thereby effectively preventing the oil baffle locking ring from falling off the follow-up inner oil baffle, making the oil baffle overall structure more stable, improving the oil baffle sealing performance, and ensuring the safe and stable operation of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional view of the follow-up oil baffle locking ring anti-falling structure provided by the embodiment of the present application;

[0014] Figure 2 is an exploded view of the structure of the stationary outer oil baffle, the follow-up inner oil baffle and the oil baffle locking ring in the follow-up oil baffle locking ring anti-falling structure provided by the embodiment of the present application;

[0015] Figure 3 is a schematic diagram of the arrangement of the first magnet and the second magnet in the follow-up oil baffle locking ring anti-falling structure provided by the embodiment of the present application. DETAILED DESCRIPTION

[0016] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar parts or parts having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0017] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] In the description of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0019] The technical scheme of the present application will be further illustrated by specific embodiments in conjunction with the drawings.

[0020] Please refer to Figure 1 and Figure 2 The preferred embodiment provides a follow-up oil baffle locking ring anti-dropping structure, which comprises a bearing box 1, a rotor 2, a stationary outer oil baffle 3, a follow-up inner oil baffle 4 and an oil baffle locking ring 5. The rotor 2 passes through the bearing box 1, the stationary outer oil baffle 3 is fixed on the bearing box 1, the follow-up inner oil baffle 4 is fixed on the rotor 2, the stationary outer oil baffle 3 and the follow-up inner oil baffle 4 are in clearance fit, and the oil baffle locking ring 5 is fastened with the follow-up inner oil baffle 4 through a locking thread 6 and is in sealing fit with the stationary outer oil baffle 3.

[0021] In particular, a sliding groove 7 is formed on the stationary outer oil baffle 3, a protrusion 8 embedded in the sliding groove 7 is arranged on the oil baffle locking ring 5, a plurality of first magnets 9 inclined and arranged in a ring array are arranged on the end face of the protrusion 8, and a plurality of second magnets 10 are arranged on the groove bottom face of the sliding groove 7. Each second magnet 10 corresponds to each first magnet 9, and the second magnet 10 and the corresponding first magnet 9 are arranged in parallel with the same polarity, thereby giving the oil baffle locking ring 5 a thrust opposite to the rotation direction of the oil baffle locking ring 5, so that the locking thread 6 of the oil baffle locking ring 5 and the follow-up inner oil baffle 4 always remain in a locked state.

[0022] Among them, the first magnet 9 and the second magnet 10 are preferably ferroboron magnets, and the first magnet 9 is fixed at an inclination angle of about 35° with the normal line of the end face of the protrusion 8, such as Figure 3As shown, the angle can meet the repulsive force of the magnetic push on the oil baffle locking ring 5, and does not affect the rotation of the oil baffle locking ring 5 with the rotor 2 and the follow-up inner oil baffle 4. The specific inclination angle value can be fine-tuned, as long as the resulting thrust has a component in the opposite direction of the rotor 2 rotation direction.

[0023] It should be noted that the first magnet 9 and the second magnet 10 have a suitable axial spacing, and only the front surface repels each other, and the back surface magnetic pole has no interference, thereby forming a thrust in the opposite direction of the rotor 2 rotation direction, ensuring the locking of the locking screw 6.

[0024] In addition, the inner circle surface of the convex part 8 is embedded with the first sealing ring 11 in friction contact with the groove wall of the sliding groove 7, the contact surface of the stationary outer oil baffle 3 and the bearing box 1 is embedded with the second sealing ring 12, and the contact surface of the follow-up inner oil baffle 4 and the rotor 2 is embedded with the third sealing ring 13, which fully guarantees the sealing performance of the overall structure.

[0025] In summary, the above-mentioned follow-up oil baffle locking ring anti-disengagement structure increases the magnetic repulsion force between the stationary outer oil baffle and the oil baffle locking ring, forming a thrust in the opposite direction of the rotor rotation direction, thereby effectively preventing the oil baffle locking ring from disengaging from the follow-up inner oil baffle, making the oil baffle overall structure more stable, improving the oil baffle sealing performance, and ensuring the safe and stable operation of the unit.

[0026] The above examples only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above examples. Without departing from the spirit and scope of the present application, various changes and modifications can be made, and these changes and modifications fall within the scope of the claimed application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A follower oil baffle locking ring anti-detachment structure, comprising a stationary outer oil baffle, a follower inner oil baffle, and an oil baffle locking ring, wherein the stationary outer oil baffle and the follower inner oil baffle are clearance-fitted, and the oil baffle locking ring is fastened to the follower inner oil baffle by locking threads and has a sealing fit with the stationary outer oil baffle, characterized in that, The stationary outer oil baffle has a groove, and the oil baffle locking ring has a protrusion that is embedded in the groove. Several first magnets are arranged in an inclined, circular array on the end face of the protrusion, and several second magnets are arranged on the bottom surface of the groove. Each second magnet corresponds to each first magnet, and the second magnets are parallel to and spaced apart from their corresponding first magnets, with the same polarity. This provides a thrust to the oil baffle locking ring in the opposite direction of its rotation, so that the locking threads of the oil baffle locking ring and the following inner oil baffle are always locked. The first magnets and the second magnets only repel each other from the front, and the magnetic poles on the back have no interference.

2. The anti-detachment structure of the follow-up oil baffle locking ring according to claim 1, characterized in that: The first magnet is fixed at a 35° angle to the normal of the end face of the protrusion.

3. The anti-detachment structure of the follow-up oil baffle locking ring according to claim 1, characterized in that: The first magnet and the second magnet are neodymium iron boron magnets.

4. The anti-detachment structure of the follow-up oil baffle locking ring according to claim 1, characterized in that: The inner ring surface of the protrusion is fitted with a first sealing ring that rubs against the groove wall of the slide.

5. The anti-detachment structure of the follow-up oil baffle locking ring according to claim 1, characterized in that: It also includes a bearing housing and a rotor passing through the bearing housing. The stationary outer oil baffle is fixed to the bearing housing, and a second sealing ring is installed on the contact surface between the stationary outer oil baffle and the bearing housing. The follower inner oil baffle is fixed to the rotor, and a third sealing ring is installed on the contact surface between the follower inner oil baffle and the rotor.

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