Combined oil seal
By using a combined oil seal design, the spring ring provides clamping force to ensure that the first ring fits tightly against the shaft, solving the problem of reduced sealing performance caused by wear of traditional oil seals under high temperature and high pressure environments, and achieving efficient sealing and convenient maintenance.
Patent Information
- Application Number
- CN202520198999.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-08
AI Technical Summary
Traditional oil seals are prone to wear in mechanical equipment operating at high temperatures, high pressures, and high speeds, leading to a decline in sealing performance. After slight wear, they can no longer effectively fit the shaft, resulting in localized damage and rendering them unusable.
The combined oil seal structure includes a first ring and a detachable second ring. The first ring is tightly fitted to the shaft by a spring ring, and the second ring limits the spring ring to ensure a good seal. It is also detachable for easy maintenance.
It improves sealing performance, extends the service life of oil seals, has a simple structure that is easy to maintain, and the design of the spring ring and the ring body ensures that it can still effectively seal after wear, thus improving the reliability of the equipment.
Smart Images
Figure CN223648553U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of this disclosure relate to the field of oil seal technology, and more specifically, to a combined oil seal. Background Technology
[0002] In the field of mechanical engineering, oil seals are crucial components. Their main function is to prevent lubricating oil leakage and to prevent external impurities such as dust and moisture from entering the interior of mechanical equipment, thereby ensuring the normal operation of the equipment and extending its service life. Traditional single-lip or double-lip oil seals can provide a certain sealing effect under normal working conditions. However, with the continuous development of industrial technology, the operating conditions of mechanical equipment are becoming increasingly demanding, placing higher requirements on the performance of oil seals.
[0003] In existing technologies, traditional combination oil seals are prone to accelerated wear and reduced sealing performance in some high-temperature, high-pressure, and high-speed mechanical equipment. When inspecting worn oil seals, it was found that most oil seals could not effectively adhere to the outer surface of the shaft after slight wear, resulting in the problem that the oil seal could not be used if it was partially damaged. Utility Model Content
[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a combined oil seal, which solves the technical problem that most oil seals in related technologies / prior technologies cannot effectively adhere to the outer surface of the shaft after slight wear, resulting in the oil seal becoming unusable as soon as it is partially damaged.
[0005] According to one aspect, at least one embodiment of this disclosure provides a combined oil seal, mounted on a shaft, comprising:
[0006] The first ring body has installation space;
[0007] A spring ring is sleeved on the first ring body and the spring ring is located within the mounting space. The spring ring is used to provide the first ring body to press against the circumferential sidewall of the shaft body.
[0008] The second ring is detachably installed within the installation space and is used to limit the position of the spring coil.
[0009] Optionally, the first ring body has a through groove in the middle, and the first ring body is sleeved on the shaft body through the through groove. The through groove has a reduced diameter section. After the first ring body is sleeved on the outer surface of the shaft body, the reduced diameter section of the through groove slides against the outer surface of the shaft body.
[0010] Optionally, the first ring body has a bending limiting groove, which is V-shaped, rectangular, or U-shaped, and the spring ring is disposed in the bending limiting groove.
[0011] Optional, also includes:
[0012] A protective pad is detachably installed in the bending limiting groove, and the spring ring is installed in the bending limiting groove through the protective pad. The protective pad is a nylon pad or a rubber pad.
[0013] Optionally, the first ring body has a slot located on the side wall of the mounting space away from the bending limiting groove, and further includes:
[0014] A snap-fit protrusion is provided on the second ring body. After the second ring body is installed into the installation space, the snap-fit protrusion snaps into the slot.
[0015] Optionally, the first ring body has a guide slope near the slot, the guide slope being used to guide the snap-fit protrusion into the slot.
[0016] Optionally, the second ring body has a receiving groove with a C-shaped longitudinal section. The receiving groove is used to receive the spring ring. After the second ring body is installed into the installation space, the opening of the receiving groove faces the bending limiting groove.
[0017] Optionally, the opening width of the receiving groove is smaller than the cross-sectional diameter of the spring coil.
[0018] Optionally, the second ring has a plurality of mesh openings, which, when the second ring is compressed, provide deformation space for the second ring.
[0019] Optional, also includes:
[0020] A baffle is disposed on the top surface of the second ring body, and the baffle is used to block the connection between the top surfaces of the first ring body and the second ring body.
[0021] The beneficial effects of the embodiments disclosed herein are as follows:
[0022] In this disclosure, the first ring is directly fitted onto the shaft. When assembling the combined oil seal, the spring ring is first placed within the mounting space of the first ring, and then the second ring is pushed into the mounting space, limiting the movement of the spring ring. The spring ring in this device primarily provides clamping force to the first ring mounted on the shaft, ensuring that the first ring remains tightly against the shaft at all times. Even after prolonged use, if wear occurs at the contact point between the first ring and the shaft, the spring ring can still press the first ring firmly against the outer surface of the shaft. The second ring limits the movement of the spring ring. After the combined oil seal and shaft are installed, the spring ring ensures that the first ring fits tightly against the circumferential sidewall of the shaft, achieving a seal. This device has a simple structure, provides clamping force through the spring ring to ensure a sealing effect, and the second ring can be disassembled relative to the first ring for easy replacement and maintenance. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0024] Figure 1 This is a schematic diagram of the internal structure of the combined oil seal in one embodiment of this disclosure;
[0025] Figure 2 This is a schematic diagram of the structure of the first ring and the spring coil in one embodiment of this disclosure;
[0026] Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle;
[0027] Figure 4 for Figure 1 Enlarged view of a section at point B in the middle;
[0028] Figure 5 This is a schematic diagram of the receiving groove structure in one embodiment of the present disclosure;
[0029] Figure 6 This is a schematic diagram of the second ring structure in one embodiment of the present disclosure;
[0030] Figure 7 This is a schematic diagram of the mesh structure in one embodiment of the present disclosure;
[0031] Figure 8 This is a schematic diagram of the overall structure of the combined oil seal in one embodiment of this disclosure.
[0032] In the diagram: 1. First ring body; 11. Installation space; 101. Through groove; 1011. Reduction section; 102. Bending limiting groove; 103. Slot; 104. Guide slope; 2. Second ring body; 201. Receiving groove; 202. Mesh; 3. Spring ring; 4. Protective pad; 5. Snap-fit protrusion; 6. Stop bar. Detailed Implementation
[0033] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0034] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0035] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0036] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0038] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] like Figures 1-2 As shown, a combined oil seal according to an embodiment of the present disclosure is installed on a shaft and includes a first ring 1 having an installation space 11; a spring ring 3 is sleeved on the first ring 1 and located within the installation space 11, the spring ring 3 being used to provide the first ring 1 with a force pressing against the circumferential sidewall of the shaft; and a second ring 2 detachably disposed within the installation space 11, the second ring 2 being used to limit the spring ring 3.
[0040] For example, such as Figure 1 As shown, when using the combined oil seal, the first ring 1 is directly fitted onto the shaft. During assembly, the spring ring 3 is first fitted into the mounting space 11 of the first ring 1, and then the second ring 2 is pushed into the mounting space 11, whereby the second ring 2 limits the movement of the spring ring 3. The spring ring 3 of this device primarily provides clamping force to the first ring 1 mounted on the shaft, ensuring that the first ring 1 remains tightly against the shaft at all times. Even after prolonged use, if wear occurs at the contact point between the first ring 1 and the shaft, the spring ring 3 can still press the first ring 1 firmly against the outer surface of the shaft. The second ring 2 limits the movement of the spring ring 3.
[0041] Specifically, after the combined oil seal and shaft are installed, the spring ring 3 ensures that the first ring 1 fits tightly against the circumferential sidewall of the shaft, achieving a seal. This device has a simple structure, using the spring ring 3 to provide clamping force to ensure a sealing effect, and the second ring 2 can be disassembled relative to the first ring 1 for easy replacement and maintenance.
[0042] In some examples, the first ring body 1 has a through groove 101 in the middle. The first ring body 1 is sleeved on the shaft body through the through groove 101. The through groove 101 has a reduced diameter section 1011. After the first ring body 1 is sleeved on the outer surface of the shaft body, the reduced diameter section 1011 of the through groove 101 slides against the outer surface of the shaft body.
[0043] For example, such as Figure 2 As shown, the first ring 1 is fitted onto the shaft through a central through groove 101, with a reduced diameter section 1011 sliding against the outer surface of the shaft. The through groove 101, with its reduced diameter section 1011, ensures a tighter contact between the first ring 1 and the shaft. As the shaft rotates, the reduced diameter section 1011 slides on the outer surface of the shaft, further enhancing the sealing effect. The reduced diameter section 1011 increases the sealing contact area, improving sealing performance.
[0044] In some examples, the first ring 1 has a bending limiting groove 102, which is V-shaped, rectangular or U-shaped, and the spring ring 3 is disposed in the bending limiting groove 102.
[0045] For example, such as Figure 3 As shown, the spring coil 3 is positioned within a V-shaped, rectangular, or U-shaped bending limiting groove 102 in the first ring body 1. The bending limiting groove 102 provides better fixation for the spring coil 3. The spring coil 3 stably provides clamping force within the bending limiting groove 102. The specially shaped bending limiting groove 102 prevents the spring coil 3 from shifting, ensuring its stable operation.
[0046] In some examples, a protective pad 4 is also included. The protective pad 4 is detachably disposed in the bending limiting groove 102. The spring ring 3 is disposed in the bending limiting groove 102 through the protective pad 4. The protective pad 4 is a nylon pad or a rubber pad.
[0047] For example, such as Figure 3 As shown, the protective pad 4 is detachably installed within the bending limiting groove 102, and the spring ring 3 is installed within the bending limiting groove 102 via the protective pad 4. The protective pad 4 is a nylon pad or a rubber pad. The addition of the protective pad 4 provides cushioning and protection. It should be noted that after the spring is installed into the bending limiting groove 102, the spring ring 3 is in a stretched state. The stretched spring exerts excessive pressure on the inner wall of the bending limiting groove 102. By adding the protective pad 4, friction and wear between the spring ring 3 and the bending limiting groove 102 are reduced during operation. This extends the service life of the spring ring 3 and the first ring body 1, improving the reliability of the combined oil seal. Specifically, the protective pad 4 can be adhered to or directly placed within the bending limiting groove 102.
[0048] In some examples, the first ring body 1 has a slot 103 located on the side wall of the mounting space 11 away from the bending limiting slot 102, and also includes a snap-fit protrusion 5 disposed on the second ring body 2. After the second ring body 2 is installed into the mounting space 11, the snap-fit protrusion 5 snaps into the slot 103.
[0049] For example, such as Figure 4 As shown, a snap-fit protrusion 5 is provided on the second ring body 2. After the second ring body 2 is installed into the installation space 11, the snap-fit protrusion 5 snaps into the slot 103 of the first ring body 1. The first ring body 1 has a slot 103, and the second ring body 2 has a snap-fit protrusion 5; the two cooperate to achieve a detachable connection. During installation, the snap-fit protrusion 5 of the second ring body 2 is inserted into the slot 103 of the first ring body 1 to complete the installation; during disassembly, the operation is reversed. This facilitates the installation and disassembly of the second ring body 2, and makes maintenance and replacement convenient.
[0050] In some examples, the first ring body 1 has a guide ramp 104 near the slot 103, which guides the snap-fit protrusion 5 into the slot 103.
[0051] For example, such as Figure 5-6 As shown, a guide ramp 104 is provided near the slot 103 on the first ring body 1. When installing the second ring body 2, the guide ramp 104 guides the snap-fit protrusion 5 into the slot 103. The addition of the guide ramp 104 facilitates installation. During installation, the snap-fit protrusion 5 can more easily enter the slot 103 along the guide ramp 104. This improves installation efficiency and reduces installation difficulty.
[0052] In some examples, the second ring 2 has a receiving groove 201 with a C-shaped longitudinal section. The receiving groove 201 is used to receive the spring coil 3. After the second ring 2 is installed into the installation space 11, the opening of the receiving groove 201 faces the bending limiting groove 102.
[0053] For example, such as Figure 5-6 As shown, the second ring 2 has a C-shaped receiving groove 201. After installation, the opening of the receiving groove 201 faces the bending limiting groove 102 to accommodate the spring ring 3. The receiving groove 201 cooperates with the spring ring 3 and the bending limiting groove 102. Part of the spring ring 3 is in the bending limiting groove 102, and part of it is in the receiving groove 201. The two work together to further fix the spring ring 3, ensure its stable operation, improve the sealing effect, and the receiving groove 201 can also prevent the spring ring 3 from being misaligned.
[0054] In some examples, the opening width of the receiving groove 201 is smaller than the cross-sectional diameter of the spring coil 3.
[0055] For example, such as Figure 5 As shown, the opening of the receiving groove 201 is oriented with a width smaller than the cross-sectional diameter of the spring coil 3. The opening of the receiving groove 201 is specially designed to prevent the spring coil 3 from coming out. The spring coil 3 is confined within the receiving groove 201 and the bending limiting groove 102, and will not come out of the opening of the receiving groove 201. This ensures the stable operation of the spring coil 3 and improves the reliability of the combined oil seal.
[0056] In some examples, the second ring body 2 has a number of mesh openings 202, which are used to provide deformation space for the second ring body 2 after it is compressed.
[0057] For example, such as Figure 7 As shown, a plurality of mesh openings 202 are provided on the second ring body 2. When the second ring body 2 is compressed, the mesh openings 202 provide deformation space. The mesh openings 202 on the second ring body 2 increase its elasticity. Under pressure, the second ring body 2 deforms through the mesh openings 202 to adapt to different working conditions. This improves the adaptability of the combined oil seal and ensures sealing performance.
[0058] In some examples, a baffle 6 is also included, which is disposed on the top surface of the second ring body 2 and is used to block the connection between the top surfaces of the first ring body 1 and the second ring body 2.
[0059] For example, such as Figure 8 As shown, a baffle 6 is provided on the top surface of the second ring 2 to seal the connection between the top surfaces of the first ring 1 and the second ring 2. The baffle 6 prevents impurities from entering. External impurities cannot enter the interior through the connection between the top surfaces of the first ring 1 and the second ring 2. This protects the internal structure and extends the service life of the combined oil seal.
[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A combined oil seal, installed on a shaft, characterized in that, include: The first ring body (1) has an installation space (11); A spring ring (3) is fitted onto the first ring body (1) and the spring ring (3) is located in the mounting space (11). The spring ring (3) is used to provide the first ring body (1) to press against the circumferential sidewall of the shaft body. The second ring (2) is detachably disposed within the installation space (11) and is used to limit the spring ring (3).
2. The combined oil seal according to claim 1, characterized in that, The first ring (1) has a through groove (101) in the middle. The first ring (1) is sleeved on the shaft through the through groove (101). The through groove (101) has a reduced diameter section (1011). After the first ring (1) is sleeved on the outer surface of the shaft, the reduced diameter section (1011) of the through groove (101) slides against the outer surface of the shaft.
3. A combined oil seal according to claim 1, characterized in that, The first ring (1) has a bending limiting groove (102), which is V-shaped, rectangular or U-shaped, and the spring ring (3) is disposed in the bending limiting groove (102).
4. A combined oil seal according to claim 3, characterized in that, Also includes: The protective pad (4) is detachably installed in the bending limiting groove (102), and the spring ring (3) is installed in the bending limiting groove (102) through the protective pad (4). The protective pad (4) is a nylon pad or a rubber pad.
5. A combined oil seal according to claim 3, characterized in that, The first ring body (1) has a slot (103) located on the side wall of the mounting space (11) away from the bending limiting groove (102), and further includes: A snap-fit protrusion (5) is provided on the second ring body (2). After the second ring body (2) is installed into the installation space (11), the snap-fit protrusion (5) snaps into the slot (103).
6. A combined oil seal according to claim 5, characterized in that, The first ring body (1) has a guide slope (104) near the slot (103), the guide slope (104) is used to guide the snap-fit protrusion (5) into the slot (103).
7. A combined oil seal according to claim 3, characterized in that, The second ring (2) has a receiving groove (201) with a C-shaped longitudinal section. The receiving groove (201) is used to receive the spring ring (3). After the second ring (2) is installed into the installation space (11), the opening of the receiving groove (201) faces the bending limiting groove (102).
8. A combined oil seal according to claim 7, characterized in that, The opening width of the receiving groove (201) is smaller than the cross-sectional diameter of the spring coil (3).
9. A combined oil seal according to claim 1, characterized in that, The second ring (2) has a plurality of mesh holes (202). After the second ring (2) is compressed, the mesh holes (202) are used to provide deformation space for the second ring (2).
10. A combined oil seal according to claim 1, characterized in that, Also includes: A baffle (6) is provided on the top surface of the second ring body (2). The baffle (6) is used to block the connection between the top surfaces of the first ring body (1) and the second ring body (2).