A new type of air seal oil seal

Abstract

The present application relates to the technical fields of seal, and discloses a novel air seal type oil seal, which comprises a slag conveyor guide wheel device, the slag conveyor guide wheel device comprises a guide wheel rotating shaft, a guide wheel outer oil seal, a guide wheel bearing, a guide wheel shell and a slag conveyor chain, characterized in that the air seal type oil seal is fixed on the guide wheel rotating shaft, and the air seal type oil seal is connected with the guide wheel shell; the air seal type oil seal comprises a first oil seal main body and a second oil seal main body; a sealing air cavity is arranged in the first oil seal main body, an air inlet is formed in the first end surface of the first oil seal main body, and the air inlet is communicated with the sealing air cavity; an annular groove is formed in the second end surface of the first oil seal main body, and an annular sealing air nozzle is arranged on the annular groove; and an oil seal cavity is formed in the inner wall of the second oil seal main body. The present application can avoid the abrasion of the oil seal lip and prevent the slag water from entering the middle bearing of the guide wheel, thereby causing the bearing damage.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, and in particular to a novel gas-sealed oil seal. Background Technology

[0002] An oil seal is a common term for general sealing components; simply put, it's a seal for lubricating oil. It's a mechanical component used to seal grease, isolating lubricated parts from power-generating parts in transmission systems to prevent lubricating oil leakage.

[0003] The working environment of the guide wheel of the slag remover is slag and water. The ash and slag particles in the slag and water are large, which will cause wear on the lip of the traditional skeleton oil seal over a long period of time. A gap will appear between the oil seal lip and the guide wheel shaft, and the slag and water will enter the intermediate bearing of the guide wheel, causing damage to the bearing. Summary of the Invention

[0004] This invention provides a novel air-sealed oil seal that prevents slag and water from entering the intermediate bearing of the guide wheel and causing bearing damage by avoiding wear on the oil seal lip.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a novel air-sealed oil seal, including a slag remover guide wheel device, wherein the slag remover guide wheel device includes a guide wheel shaft, an outer guide wheel oil seal, a guide wheel bearing, a guide wheel housing, and a slag remover chain, wherein the air-sealed oil seal is fixed on the guide wheel shaft, and the air-sealed oil seal is connected to the guide wheel housing;

[0006] The gas-sealed oil seal includes a first oil seal body and a second oil seal body;

[0007] The first oil seal body has a sealing air chamber inside, and an air inlet is opened on the first end face of the first oil seal body, which is connected to the sealing air chamber; an annular groove is opened on the second end face of the first oil seal body, and an annular sealing air nozzle is provided on the annular groove.

[0008] The inner wall of the second oil seal body has an oil seal cavity.

[0009] In one embodiment, a first lip is provided at one end of the inner wall of the first oil seal body, and the first lip is close to the first end face.

[0010] In one embodiment, the first lip is clearance-fitted with the guide wheel shaft.

[0011] In one embodiment, the annular sealing air nozzle is obliquely disposed on the inner wall of the annular groove, the inlet of the annular sealing air nozzle is close to the second end face, and the outlet of the annular sealing air nozzle is close to the first end face.

[0012] In one embodiment, the radial distance from the annular sealing nozzle to the guide wheel shaft is greater than the radial distance from the inner wall of the first oil seal body to the guide wheel shaft.

[0013] In one embodiment, the oil seal cavity is a hemispherical annular groove.

[0014] In one embodiment, a second lip and a third lip are respectively provided at both ends of the opening of the oil seal cavity, and the second lip and the third lip are provided on the inner wall of the second oil seal body.

[0015] In one embodiment, the second lip and the third lip are interference-fitted with the guide wheel shaft.

[0016] In one embodiment, the first lip is used to secure the dustproof lip.

[0017] In one embodiment, the second lip and the third lip are used to fix the sealing lip.

[0018] The technical effects of this invention are as follows: Sealing air is introduced through the air inlet, flows through the sealing air chamber, and is discharged from the sealing air nozzle to the annular groove. The sealing air in the annular groove is discharged from the first lip. When the sealing air is blown out along the first lip, it effectively isolates the slag and water near the first lip from the guide wheel bearing, preventing wear on the oil seal lip and thus preventing slag and water from entering the guide wheel intermediate bearing and causing bearing damage. The second oil seal body achieves another seal, further preventing slag and water from entering the guide wheel intermediate bearing and causing bearing damage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the novel gas-sealed oil seal provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a conventional slag removal machine guide wheel device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the first oil seal body provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the second oil seal body provided in an embodiment of the present invention;

[0024] The components include: 1. Guide wheel shaft; 2. Guide wheel outer oil seal; 3. Guide wheel bearing; 4. Guide wheel housing; 5. Slag remover chain; 6. Guide wheel inner air-sealed oil seal; 7. Air-sealed oil seal; 10. First oil seal body; 11. First end face; 12. Air inlet; 13. Sealed air cavity; 14. Second end face; 15. Annular groove; 16. Annular sealing air nozzle; 17. First lip; 20. Second oil seal body; 21. Oil seal cavity; 22. Second lip; 23. Third lip. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection 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 application based on the specific circumstances.

[0029] The working environment of the slag remover guide wheel is slag-water. The large particle size of the slag in the slag-water causes wear on the lip of the traditional skeleton oil seal over time, creating a gap between the oil seal lip and the guide wheel shaft 1. Slag-water can then enter the intermediate bearing of the guide wheel, causing bearing damage. The existing slag remover guide wheel structure diagram is shown below. Figure 2 As shown, the ash particles in the slag water will wear down the oil seal lip.

[0030] like Figure 1-3As shown, this embodiment discloses a novel air-sealed oil seal 7, including a slag remover guide wheel device. The slag remover guide wheel device includes a guide wheel shaft 1, a guide wheel outer oil seal 2, a guide wheel bearing 3, a guide wheel housing 4, and a slag remover chain 5. The air-sealed oil seal 7 is fixed on the guide wheel shaft 1, and the air-sealed oil seal 7 is connected to the guide wheel housing 4.

[0031] The gas-sealed oil seal 7 includes a first oil seal body 10 and a second oil seal body 20;

[0032] The first oil seal body 10 has a sealing air chamber 13 inside, and an air inlet 12 is opened on the first end face 11 of the first oil seal body 10, which is connected to the sealing air chamber 13; an annular groove 15 is opened on the second end face 14 of the first oil seal body 10, and an annular sealing air nozzle 16 is provided on the annular groove 15.

[0033] The inner wall of the second oil seal body 20 is provided with an oil seal cavity 21.

[0034] It is understandable that in the above embodiments, the existing slag removal machine guide wheel device, under prolonged wear from slag and water, is prone to developing a gap between the air-sealed oil seal 76 inside the guide wheel and the guide wheel shaft 1, causing the slag and water to come into contact with the guide wheel bearing 3. The ash particles in the slag and water will cause wear to the guide wheel bearing 3, leading to damage. To avoid wear caused by prolonged contact between the air-sealed oil seal 76 inside the guide wheel and the slag and water, and thus to prevent a gap from appearing between the air-sealed oil seal 76 inside the guide wheel and the guide wheel shaft 1, the air-sealed oil seal 76 inside the guide wheel is replaced with a new type of air-sealed oil seal 7.

[0035] The first body of the air-sealed oil seal 7 is used to blow out slag and water, preventing them from entering the annular groove 15, thus achieving the first layer of protection. The second oil seal body 20 is used for sealing, preventing slag and water from passing through the air-sealed oil seal 7 and wearing the guide wheel bearing 3, thus achieving the second layer of protection. It should be noted that the air inlet 12 is installed on the inner side of the guide wheel, and the sealing air is introduced from the air inlet 12 to the sealing air nozzle through a pipe, effectively isolating the slag and water from the bearing. The pipe can be a stainless steel pipe, or the sealing air cavity 13 can be designed as a pipe for conveying sealing air.

[0036] like Figure 1-3 As shown, in some specific embodiments, a first lip 17 is provided at one end of the inner wall of the first oil seal body 10, and the first lip 17 is close to the first end face 11. The first lip 17 is used to fix the dustproof lip.

[0037] It is understood that in the above embodiment, the first lip 17 of the first oil seal body 10 is fixed with a dustproof lip, which serves to prevent dust, impurities and other external contaminants from entering the guide wheel bearing 3.

[0038] It should be noted that the first lip 17 can be designed as a wedge shape according to actual sealing needs, and the dust lip is a flexible elastomer, which can still maintain a stable sealing effect under the influence of mechanical vibration and pressure changes of the sealing fluid.

[0039] In some specific embodiments, the first lip 17 is clearance-fitted with the guide wheel shaft 1.

[0040] It is understood that in the above embodiment, there is a gap between the first lip 17 and the guide wheel shaft 1, and a gap between the dustproof lip and the guide wheel shaft 1. The sealing air can be discharged through this gap to blow away the slag and water that flow into the vicinity of the first oil seal body 10, so as to avoid the ash particles in the slag and water from wearing away the dustproof lip on the first lip 17.

[0041] It is important to note that the annular sealing air nozzle 16 is a rigid, open annular groove. The size and direction of the opening of the annular sealing air nozzle 16 are controlled within a suitable range to ensure the direction and pressure of the sealing air. The magnitude of the sealing air ejected by the annular sealing air nozzle 16 affects the ability to prevent slag and water from entering the annular groove 15, and the magnitude of the sealing air depends on the speed at which the slag and water flow in.

[0042] A preset slag and water inflow velocity matrix V0 is set, where V0 = (V1, V2, V3, V4), where V1 is the first preset slag and water inflow velocity, V2 is the second preset slag and water inflow velocity, V3 is the third preset slag and water inflow velocity, and V4 is the fourth preset slag and water inflow velocity, where V1 < V2 < V3 < V4.

[0043] A preset sealing air velocity matrix G0 is set, and G0 = (G1, G2, G3, G4), where G1 is the first preset sealing air velocity, G2 is the second preset sealing air velocity, G3 is the third preset sealing air velocity, G4 is the fourth preset sealing air velocity, and G1 < G2 < G3 < G4.

[0044] The sealing air velocity G is set according to the relationship between the slag and water inflow velocity V and the preset slag and water inflow velocities:

[0045] When V < V1, the first preset sealing wind speed G1 is selected as the sealing wind speed G;

[0046] When V1≤V<V2, the second preset sealing wind speed G2 is selected as the sealing wind speed G;

[0047] When V2≤V<V3, the third preset sealing wind speed G3 is selected as the sealing wind speed G;

[0048] When V3≤V<V4, the fourth preset sealing wind speed G4 is selected as the sealing wind speed G.

[0049] It is understood that in the above embodiments, the sealing air speed G is set according to the relationship between the slag and water inflow speed V and each preset slag and water inflow speed, so as to avoid the air speed being too low and unable to blow out the slag and water; and to avoid the air speed being too high and damaging the dustproof lip, causing one side of the dustproof lip to tilt.

[0050] It should be noted that the above preferred embodiments are only one specific implementation method proposed in this application. Those skilled in the art can select other preset slag and water inflow velocity matrix V0 and preset sealing air velocity matrix G0 according to the actual situation, which does not affect the protection scope of this application.

[0051] For example, if the scraper speed of the slag remover is 0.7-3 m / min during normal operation, its slag-water velocity is also within the range of 0.7-3 m / min. The sealing air velocity should be slightly greater than the slag-water inflow velocity. Assume that a preset slag-water inflow velocity matrix V0 is set in advance, and V0 = (1 m / min, 1.5 m / min, 2 m / min, 3 m / min), where 1 m / min is the first preset slag-water inflow velocity, 1.5 m / min is the second preset slag-water inflow velocity, 2 m / min is the third preset slag-water inflow velocity, and 3 m / min is the fourth preset slag-water inflow velocity, where 1 m / min < 1.5 m / min < 2 m / min < 3 m / min;

[0052] A preset sealing air velocity matrix G0 is set, where G0 = (1.1 m / min, 1.6 m / min, 2.1 m / min, 3.1 m / min), where 1.1 m / min is the first preset sealing air velocity, 1.6 m / min is the second preset sealing air velocity, 2.1 m / min is the third preset sealing air velocity, and 3.1 m / min is the fourth preset sealing air velocity, and 1.1 m / min < 1.6 m / min < 2.1 m / min < 3.1 m / min.

[0053] The sealing air velocity G is set according to the relationship between the slag and water inflow velocity V and the preset slag and water inflow velocities:

[0054] When V < 1 m / min, the first preset sealing air velocity of 1.1 m / min is selected as the sealing air velocity G;

[0055] When 1 m / min ≤ V < 1.5 m / min, the second preset sealing air velocity of 1.6 m / min is selected as the sealing air velocity G;

[0056] When 1.5 m / min ≤ V < 2 m / min, the third preset sealing air velocity of 2.1 m / min is selected as the sealing air velocity G;

[0057] When 2.1 m / min ≤ V < 3 m / min, the fourth preset sealing wind speed of 3.1 m / min is selected as the sealing wind speed G.

[0058] In some specific embodiments, the annular sealing air nozzle 16 is obliquely disposed on the inner wall of the annular groove 15, the inlet of the annular sealing air nozzle 16 is close to the second end face 14, and the outlet of the annular sealing air nozzle 16 is close to the first end face 11.

[0059] It is understood that in the above embodiments, the annular sealing air nozzle 16 is inclinedly disposed on the inner wall of the annular groove 15, and the inclination angle can be set according to actual needs, while the inclination direction remains unchanged. It should be noted that the size of the included angle between the annular sealing air nozzle 16 and the annular groove 15 affects the air outlet direction. The optimal air outlet direction is when the air outlet direction of the annular sealing air nozzle 16 is directly opposite the gap between the guide wheel shaft 1 and the first lip 17.

[0060] In some specific embodiments, the radial distance from the annular sealing air nozzle 16 to the guide wheel shaft 1 is greater than the radial distance from the inner wall of the first oil seal body 10 to the guide wheel shaft 1.

[0061] It is understood that in the above embodiments, the length of the annular sealing air nozzle 16 is within a certain range, which can both avoid the annular sealing air nozzle 16 from contacting the guide wheel shaft 1 and allow the sprayed sealing air to flow out from the gap between the dustproof lip and the guide wheel shaft 1. The radial distance from the annular sealing air nozzle 16 to the guide wheel shaft 1 is greater than the radial distance from the inner wall of the first oil seal body 10 to the guide wheel shaft 1, that is, the radial distance from the annular sealing air nozzle 16 to the guide wheel shaft 1 is greater than the radial distance from the first lip 17 to the guide wheel shaft 1.

[0062] like Figure 1 , 2 As shown in Figures 4 and 5, in some specific embodiments, the oil seal cavity 21 is a hemispherical annular groove 15.

[0063] It is understood that the shape of the oil seal cavity 21 in the above embodiments is not uniquely determined. The main function of the oil seal cavity 21 is to seal oil internally and prevent dust externally. Using a hemispherical annular groove 15 can maximize the storage of oil.

[0064] In some specific embodiments, a second lip 22 and a third lip 23 are respectively provided at both ends of the opening of the oil seal cavity 21. The second lip 22 and the third lip 23 are located on the inner wall of the second oil seal body 20. The second lip 22 and the third lip 23 are interference-fitted with the guide wheel shaft 1. The second lip 22 and the third lip 23 are used to fix the sealing lip.

[0065] It is understandable that in the above embodiment, the second lip 22 with the fixed sealing lip and the third lip 23 are interference-fitted with the guide wheel shaft 1, which acts as a second protective wall for the bearing, ensuring that sludge and water cannot enter the bearing.

[0066] The novel air-sealed oil seal provided by this invention introduces sealing air through the air inlet, allowing the sealing air to flow through the sealing air chamber and exit from the sealing air nozzle into the annular groove. The sealing air in the annular groove exits from the first lip. As the sealing air blows out along the first lip, it effectively isolates the slag and water near the first lip from the guide wheel bearing, preventing wear on the oil seal lip and thus preventing slag and water from entering the intermediate bearing of the guide wheel and causing bearing damage. The second lip, which is fixed to the second oil seal body, and the third lip are interference-fitted with the guide wheel shaft, act as a second protective wall for the bearing, ensuring that slag and water cannot enter the bearing.

[0067] The novel gas-sealed oil seal provided by this invention has a multi-seal structure in which the first oil seal body and the second oil seal body realize a multi-seal structure, which can improve the sealing performance, better protect the oil seal itself, and extend the service life of the oil seal.

[0068] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages does not have to be sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0069] It will be understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas-sealed oil seal, comprising a guide wheel device for a slag remover, wherein the guide wheel device comprises a guide wheel shaft, an outer oil seal for the guide wheel, a guide wheel bearing, a guide wheel housing, and a chain for the slag remover, characterized in that, The gas-sealed oil seal is fixed on the guide wheel shaft, and the gas-sealed oil seal is connected to the guide wheel housing; The gas-sealed oil seal includes a first oil seal body and a second oil seal body; The first oil seal body has a sealing air chamber inside, and an air inlet is opened on the first end face of the first oil seal body, which is connected to the sealing air chamber; an annular groove is opened on the second end face of the first oil seal body, and an annular sealing air nozzle is provided on the annular groove. The inner wall of the second oil seal body is provided with an oil seal cavity; The first oil seal body has a first lip at one end of its inner wall, and the first lip is close to the first end face; The first lip is clearance-fitted with the guide wheel shaft; The annular sealing air nozzle is inclinedly disposed on the inner wall of the annular groove, the inlet of the annular sealing air nozzle is close to the second end face, and the outlet of the annular sealing air nozzle is close to the first end face. The radial distance from the annular sealing nozzle to the guide wheel shaft is greater than the radial distance from the inner wall of the first oil seal body to the guide wheel shaft; The oil seal cavity is a hemispherical annular groove; The oil seal cavity opening is provided with a second lip and a third lip at both ends, and the second lip and the third lip are located on the inner wall of the second oil seal body.

2. The gas-sealed oil seal according to claim 1, characterized in that, The second lip and the third lip are interference-fitted with the guide wheel shaft.

3. The gas-sealed oil seal according to claim 1, characterized in that, The first lip is used to secure the dustproof lip.

4. The gas-sealed oil seal according to claim 1, characterized in that, The second lip and the third lip are used to fix the sealing lip.

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