Framework oil seal with adjustable sealing gap

Abstract

The utility model relates to the technical field of framework oil seals, in particular to a framework oil seal with an adjustable sealing gap, which comprises an oil seal main body, the oil seal main body is provided with an adjusting mechanism, the adjusting mechanism comprises an inner arc-shaped groove, the inner arc-shaped groove is arranged on the inner wall of the oil seal main body, and an elastic lip is arranged on the inner wall of the oil seal main body; the elastic rope is arranged on the outer side of the elastic lip in a surrounding mode. Through the elastic rope in the adjusting mechanism, the locking force of the elastic lip can be dynamically adjusted according to the actual change conditions (such as manufacturing errors, thermal expansion and abrasion) of the shaft diameter, so that adaptation to different shaft diameters is realized, the sealing performance is always stable and reliable, the problem of oil leakage or sealing failure caused by the change of the shaft diameter is avoided, and the service life of the sealing device is prolonged. The self-adaptive capacity of the oil seal is improved, frequent replacement caused by the fact that a traditional oil seal cannot adapt to shaft diameter changes is reduced, and the applicability of the framework oil seal is improved.

Description

Technical Field

[0001] This utility model relates to the field of skeleton oil seal technology, specifically an adjustable sealing gap skeleton oil seal. Background Technology

[0002] A skeleton oil seal is a commonly used component for sealing rotating shafts. Its sealing principle involves the synergistic action of multiple key components to prevent lubricating oil leakage and prevent external impurities from entering. In the installed state, the inner diameter of the skeleton oil seal is slightly smaller than the shaft diameter, forming a certain interference fit. Under the action of a spring, the sealing lip applies radial pressure to the shaft, forming a sealing contact zone. During operation, a very thin oil film is formed between the sealing lip and the shaft. This oil film has fluid lubrication characteristics, which can prevent lubricating oil leakage and reduce friction and wear.

[0003] In practical applications, due to manufacturing errors, thermal expansion, wear, and other factors, the shaft diameter often varies within a certain range. Existing skeleton oil seals, with their fixed dimensions and limited deformation, cannot adapt to such shaft diameter variations, leading to decreased sealing performance and consequently affecting the reliability and service life of the equipment. Taking common rubber rings as an example, if the inner diameter is too small compared to the shaft diameter, it is prone to tearing during installation; if the inner diameter is too large compared to the shaft diameter, oil leakage is likely to occur during use. It is evident that the structural characteristics of skeleton oil seals limit their compatibility to a single range of shaft diameters, lacking self-adaptability. This results in poor applicability under various complex working conditions, requiring frequent replacement of oil seals of different sizes to fit shafts of different diameters, thus demonstrating poor applicability.

[0004] In view of this, we propose an adjustable sealing gap skeleton oil seal. Utility Model Content

[0005] The purpose of this utility model is to provide an adjustable sealing gap skeleton oil seal, which solves the problem that existing skeleton oil seals, due to their fixed size and limited deformation, cannot adapt to changes in shaft diameter caused by manufacturing errors, thermal expansion or wear, resulting in decreased sealing performance and poor applicability.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable sealing gap skeleton oil seal includes an oil seal body with an adjustment mechanism. The adjustment mechanism includes: an inner arc-shaped groove on the inner wall of the oil seal body, and an elastic lip on the inner wall of the oil seal body; an elastic rope wrapped around the outer side of the elastic lip, one end of the elastic rope being fixedly connected to a first connecting block, and the other end of the elastic rope being fixedly connected to a second connecting block. A first fastening bolt is threaded onto the inner wall of the first connecting block, and a second fastening bolt is threaded onto the inner wall of the second connecting block. The first fastening bolt passes through the inner arc-shaped groove. The oil seal body also includes a reinforcing mechanism for supplementing and reinforcing the gap caused by the inner arc-shaped groove.

[0008] Preferably, the oil seal body is provided with a connector, and the connector is provided with a through hole.

[0009] Preferably, the reinforcing mechanism includes an outer arc-shaped groove, which is disposed on the outer wall of the oil seal body. The outer arc-shaped groove is located outside the inner arc-shaped groove. An internal thread groove is provided on the inner wall of the outer arc-shaped groove. A semi-circular ring is inserted into the inner wall of the outer arc-shaped groove, and an outer positioning groove is provided on the semi-circular ring.

[0010] Preferably, the elastic rope is made of oil-resistant rubber material, and the elastic lip is made of wear-resistant and high-temperature-resistant rubber material.

[0011] Preferably, the first fastening bolt and the second fastening bolt are connected to the first connecting block and the second connecting block by a threaded engagement, and the thread is a fine thread.

[0012] Preferably, limit blocks are provided at both ends of the inner arc-shaped groove to limit the movement range of the first connecting block and the second connecting block within the inner arc-shaped groove.

[0013] Preferably, an anti-loosening washer is provided between the outer arc groove and the semi-circular ring contact surface to prevent the bolts from loosening due to vibration and affecting the structural stability.

[0014] By employing the above technical solution, this utility model provides an adjustable sealing gap skeleton oil seal. It possesses at least the following beneficial effects:

[0015] 1. This utility model, through the adjustment mechanism, can dynamically adjust the locking force of the elastic lip according to the actual changes in shaft diameter (such as manufacturing errors, thermal expansion, wear, etc.), thereby achieving adaptation to different shaft diameters, ensuring that the sealing performance is always stable and reliable, avoiding oil leakage or seal failure caused by changes in shaft diameter, improving the self-adaptability of the oil seal, reducing the frequent replacement of traditional oil seals due to their inability to adapt to changes in shaft diameter, and improving the applicability of the skeleton oil seal.

[0016] 2. This utility model incorporates a reinforcing mechanism. The semi-circular ring in the reinforcing mechanism is fastened to the threaded bolt in the outer arc groove through the outer positioning groove. This effectively compensates for the localized weakening of the oil seal body caused by the opening of the inner arc groove, further enhancing the overall structural stability and durability of the oil seal. During the entire adjustment process, the fine thread structure ensures the fine-tuning accuracy of the elastic rope tension. The anti-loosening washer effectively prevents the loosening of fastening components caused by long-term vibration, ensuring long-lasting and reliable sealing performance. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the reinforcing mechanism in this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the oil seal body in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Oil seal body; 2. Connector; 3. Adjustment mechanism; 31. Inner arc groove; 32. Elastic lip; 33. Elastic rope; 34. First connecting block; 35. First fastening bolt; 36. Second connecting block; 37. Second fastening bolt; 4. Reinforcing mechanism; 41. Outer arc groove; 42. Inner thread groove; 43. Semi-circular ring; 44. Outer positioning groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4As shown, this utility model provides a technical solution: an adjustable sealing gap skeleton oil seal, including an oil seal body 1, an adjustment mechanism 3 provided on the oil seal body 1, the adjustment mechanism 3 including: an inner arc-shaped groove 31, the inner arc-shaped groove 31 being provided on the inner wall of the oil seal body 1, an elastic lip 32 being provided on the inner wall of the oil seal body 1; an elastic rope 33, the elastic rope 33 being arranged around the outer side of the elastic lip 32, one end of the elastic rope 33 being fixedly connected to a first connecting block 34, and the other end of the elastic rope 33 being fixedly connected to... There is a second connecting block 36. A first fastening bolt 35 is threaded onto the inner wall of the first connecting block 34, and a second fastening bolt 37 is threaded onto the inner wall of the second connecting block 36. The first fastening bolt 35 passes through the inner arc-shaped groove 31. Pulling the first fastening bolt 35 and the second fastening bolt 37 respectively drives the first connecting block 34 and the second connecting block 36, causing the first connecting block 34 and the second connecting block 36 to pull the two ends of the elastic rope 33, adjusting the degree of locking of the elastic rope 33 to the elastic lip 32, and rotating the first... The fastening bolt 35 and the first connecting block 34 abut against and fix the inner and outer sides of the inner arc groove 31. Similarly, rotating the second fastening bolt 37 and the second connecting block 36 abuts against and fixes the inner and outer sides of the inner arc groove 31. The radial pressure of the elastic lip 32, controlled by the tension of the elastic rope 33, can be adjusted, so that the clamping force of the elastic lip 32 on the rotating shaft can be dynamically adjusted. Through this structural design, the locking force of the elastic lip 32 can be adjusted in time according to the actual changes in the shaft diameter, such as dimensional fluctuations caused by manufacturing errors, thermal expansion and contraction, and wear, so as to maintain a stable and reliable sealing effect and avoid oil leakage or sealing failure caused by changes in shaft diameter. At the same time, it avoids frequent replacement of oil seals of different sizes, improves the applicability of the skeleton oil seal, reduces maintenance costs, and improves the continuous working capacity and reliability of the equipment. The oil seal body 1 is provided with a reinforcing mechanism 4, which is used to supplement and reinforce the gap caused by the inner arc groove 31, so as to prevent the gap caused by the inner arc groove 31 from affecting the structural strength of the oil seal body 1.

[0025] The oil seal body 1 is provided with a connector 2, and the connector 2 is provided with a through hole for bolts to pass through for fixing.

[0026] The reinforcing mechanism 4 includes an outer arc-shaped groove 41, which is located on the outer wall of the oil seal body 1. The outer arc-shaped groove 41 is located outside the inner arc-shaped groove 31. An inner thread groove 42 is provided on the inner wall of the outer arc-shaped groove 41. A semi-circular ring 43 is inserted into the inner wall of the outer arc-shaped groove 41. An outer positioning groove 44 is provided on the semi-circular ring 43. The outer positioning groove 44 is fastened to the inner thread groove 42 by bolts, so that the semi-circular ring 43 and the outer arc-shaped groove 41 are fixed to each other.

[0027] The elastic rope 33 is made of oil-resistant rubber to improve its service life and tensile properties in lubricated environments. The elastic lip 32 is made of wear-resistant and high-temperature resistant rubber to meet the sealing requirements under high-speed rotation and high-temperature conditions. The first fastening bolt 35 and the second fastening bolt 37 are connected to the first connecting block 34 and the second connecting block 36 by threaded engagement, and the thread is a fine thread to achieve fine adjustment of the tension of the elastic rope 33. Limiting blocks are provided at both ends of the inner arc groove 31 to limit the movement range of the first connecting block 34 and the second connecting block 36 within the inner arc groove 31. Anti-loosening washers are provided between the contact surfaces of the outer arc groove 41 and the semi-circular ring 43 to prevent bolt loosening due to vibration from affecting structural stability.

[0028] In use, the adjustable sealing gap skeleton oil seal of this utility model is first installed and fixed to the target equipment through the through hole on the connector 2, ensuring that the oil seal body 1 is reliably positioned outside the rotating shaft. After installation, the first fastening bolt 35 and the second fastening bolt 37 are initially adjusted to moderately tighten the elastic rope 33, and the elastic lip 32 applies basic radial pressure to the rotating shaft. During equipment operation, if the shaft diameter is detected to change due to thermal expansion and contraction, wear, or other reasons, the first fastening bolt 35 and the second fastening bolt 37 can be rotated to drive the first connecting block 34 and the second connecting block 36 to move along the inner arc groove 31, thereby tightening or loosening the elastic rope 33, realizing dynamic adjustment of the pressing force of the elastic lip 32, and maintaining stable sealing performance. After adjustment, the first fastening bolt 35 and the second fastening bolt 37 are rotated to make them abut against the inner and outer sides of the inner arc groove 31 and fix them to prevent loosening after adjustment.

[0029] In addition, the semi-circular ring 43 in the strengthening mechanism 4 is fastened to the outer positioning groove 44 and the inner thread groove 42 of the outer arc groove 41 by bolts, which effectively compensates for the local strength weakening of the oil seal body 1 caused by the opening of the inner arc groove 31, and further improves the overall structural stability and durability of the oil seal. During the entire adjustment process, the fine thread structure ensures the fine adjustment accuracy of the tension of the elastic rope 33, and the setting of the anti-loosening washer effectively prevents the loosening of fastening parts caused by long-term vibration, ensuring the long-lasting and reliable sealing performance.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable sealing gap skeleton oil seal, comprising an oil seal body (1), characterized in that: An adjustment mechanism (3) is provided on the oil seal body (1), and the adjustment mechanism (3) includes: An inner arc groove (31) is provided on the inner wall of the oil seal body (1), and an elastic lip (32) is provided on the inner wall of the oil seal body (1). An elastic rope (33) is arranged around the outside of the elastic lip (32). One end of the elastic rope (33) is fixedly connected to a first connecting block (34), and the other end of the elastic rope (33) is fixedly connected to a second connecting block (36). A first fastening bolt (35) is threaded on the inner wall of the first connecting block (34), and a second fastening bolt (37) is threaded on the inner wall of the second connecting block (36). The first fastening bolt (35) passes through the inner arc groove (31). The oil seal body (1) is provided with a reinforcing mechanism (4) for supplementing and reinforcing the gap caused by the inner arc groove (31).

2. The adjustable sealing gap skeleton oil seal according to claim 1, characterized in that: The oil seal body (1) is provided with a connector (2), and the connector (2) is provided with a through hole.

3. The adjustable sealing gap skeleton oil seal according to claim 1, characterized in that: The reinforcing mechanism (4) includes an outer arc groove (41), which is located on the outer wall of the oil seal body (1). The outer arc groove (41) is located outside the inner arc groove (31). An inner thread groove (42) is provided on the inner wall of the outer arc groove (41). A semi-circular ring (43) is inserted into the inner wall of the outer arc groove (41). An outer positioning groove (44) is provided on the semi-circular ring (43).

4. The adjustable sealing gap skeleton oil seal according to claim 1, characterized in that: The elastic rope (33) is made of oil-resistant rubber material, and the elastic lip (32) is made of wear-resistant and high-temperature resistant rubber material.

5. The adjustable sealing gap skeleton oil seal according to claim 1, characterized in that: The first fastening bolt (35) and the second fastening bolt (37) are connected to the first connecting block (34) and the second connecting block (36) by thread engagement, and the thread is a fine thread.

6. The adjustable sealing gap skeleton oil seal according to claim 1, characterized in that: Limiting blocks are provided at both ends of the inner arc groove (31) to limit the movement range of the first connecting block (34) and the second connecting block (36) within the inner arc groove (31).

7. The adjustable sealing gap skeleton oil seal according to claim 3, characterized in that: An anti-loosening washer is provided between the contact surface of the outer arc groove (41) and the semi-circular ring (43) to prevent the bolts from loosening due to vibration and affecting the structural stability.

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