Oil leakage prevention structure for secondary speed reducer of converter

Abstract

The oil leakage prevention structure comprises a shaft sleeve, an oil seal gland, a transparent cover and a bearing seat, an oil seal is arranged between an inner ring of the transparent cover and an outer ring of the shaft sleeve, the shaft sleeve is sleeved on an outer ring of a hub and installed on an inner ring of the oil seal, a first end face of the shaft sleeve abuts against an end face of an inner ring of the bearing, and a second end face of the shaft sleeve is pressed tightly through a shaft end baffle. An inner hole of the oil seal gland is connected with the outer ring of the shaft sleeve in a matched mode. The spigot end face of the oil seal gland tightly presses the oil seal. The transparent cover is fixed to the bearing seat. The third end face of the transparent cover is tightly attached to the end face of the outer ring of the bearing. The fourth end face of the transparent cover is an attaching face of the oil seal gland. An oil collecting groove is formed in the bottom of the oil seal gland, a first oil return hole is formed in the bottom of the transparent cover, a second oil return hole is formed in the bottom of the bearing seat, and the annular groove, the oil collecting groove, the first oil return hole and the second oil return hole are sequentially communicated. The utility model can realize oil collection, oil receiving and oil return, and is simple in structure and convenient to process.

Description

Technical Field

[0001] The utility model relates to the technical field of oil leakage prevention structures, in particular to an oil leakage prevention structure for a secondary reducer of a converter. Background Art

[0002] The converter tilting device is a key equipment in the converter steelmaking production process, among which the secondary reducer is the main component of the converter tilting device. In the actual production process, there is oil leakage at the shaft end of the converter secondary reducer to varying degrees. The oil leakage is mainly because the reducer cannot be effectively cooled during operation, which increases the internal temperature of the reducer and the pressure in the inner cavity of the box gradually increases. The higher the temperature inside the machine, the greater the pressure difference with the outside. Although the oil seal is used to block the inner grease and the outside air, the oil seal and the shaft sleeve are relatively rotating. When the pressure in the inner cavity of the box increases, the lubricating oil may seep out from between the shaft sleeve and the oil seal. The oil leakage part is mainly composed of the secondary large gear hub, bearing, oil seal, oil seal sleeve, oil seal gland, bearing cover, etc. As the reducer is used for a longer time, the amount of oil leakage gradually increases, which not only causes waste of lubricating oil, pollutes the environment, and affects the appearance of the secondary reducer, but also the converter is in a high temperature environment, and the leakage of lubricating oil also has a fire hazard. The existing solutions include changing the oil seal structure or increasing the oil return groove at the stopper end of the cover. Although the oil leakage phenomenon can be improved in the short term, it cannot be completely eliminated. The second solution is to add an oil collecting cover to the outside of the cover. The oil collecting cover is large in size and is not suitable for converters with compact space structures. Therefore, further improvement measures are needed.

[0003] In summary, it is necessary to provide a new type of oil leakage prevention structure to solve the deficiencies of the prior art. Summary of the invention

[0004] According to the technical problems raised above, an oil leakage prevention structure for a converter secondary reducer is provided. The utility model mainly realizes oil collection, oil connection and oil return by setting an annular groove on the shaft sleeve, setting an oil collecting cavity and an oil collecting groove on the oil seal gland, and setting an oil return hole on the transparent cover and the bearing seat. The technical means adopted by the utility model are as follows:

[0005] An anti-leakage structure for a secondary speed reducer of a converter, comprising a shaft sleeve, an oil seal gland, a transparent cover and a bearing seat, an oil seal is arranged between the inner ring of the transparent cover and the outer ring of the shaft sleeve, the shaft sleeve is sleeved on the outer ring of the wheel hub and installed on the inner ring of the oil seal, one end face of the shaft sleeve is close to the inner ring end face of the bearing, and the other end face is pressed by a shaft end baffle, the shaft end baffle is fixed on the wheel hub, the oil seal gland is fixed on the transparent cover, the inner hole of the oil seal gland is matched and connected with the outer ring of the shaft sleeve, the stop end face of the oil seal gland presses the oil seal, the transparent cover is fixed on the bearing seat, one end face of the transparent cover is close to the outer ring end face of the bearing, and the other end face is a fitting surface of the oil seal gland;

[0006] The outer ring of the shaft sleeve is provided with an annular groove, the bottom of the oil seal pressure cover is provided with an oil collecting groove, the bottom of the transparent cover is provided with a first oil return hole, and the bottom of the bearing seat is provided with a second oil return hole. The annular groove is connected with the oil collecting groove, one end of the first oil return hole is connected with the oil collecting groove, and the other end is connected with the second oil return hole, and the second oil return hole is connected with the inside of the secondary reducer housing.

[0007] Furthermore, a U-shaped groove is provided on the end of the second oil return hole close to the first oil return hole, and the U-shaped groove is connected with the first oil return hole to form an oil storage bend.

[0008] Furthermore, the outer ring of the shaft sleeve has a first inclined surface, and the annular groove is provided on the first inclined surface.

[0009] Furthermore, the shaft diameters on both sides of the annular groove are different, and the shaft diameter close to the oil seal side is larger.

[0010] Furthermore, the inner hole of the oil seal gland is provided with a second inclined surface, and the inclination angle of the second inclined surface is the same as the inclination angle of the first inclined surface where the annular groove is located.

[0011] Furthermore, the gap between the outer ring of the sleeve and the oil seal cover constitutes a non-contact sealing structure, and an oil collecting chamber is provided on the oil seal cover near the inside of the oil seal, and the oil collecting chamber is located in the gap, and the annular groove and the oil collecting groove are both connected to the oil collecting chamber.

[0012] Furthermore, the axial position of the annular groove is inside the oil collecting cavity.

[0013] Furthermore, a plurality of bolt holes are opened on the oil seal gland along the circumferential direction, the oil seal gland is fixedly connected to the transparent cover through the plurality of bolt holes and bolts, and the transparent cover is fixed to the bearing seat through bolts.

[0014] Furthermore, an O-ring 1 is provided between the inner ring of the shaft sleeve and the outer ring of the wheel hub, and an O-ring 2 is provided between the stopper of the transparent cover and the inner ring of the bearing seat.

[0015] Furthermore, the shaft end baffle is fixed to the wheel hub by bolts evenly distributed on the circumference, and there is a 1 mm gap between the end surface of the shaft end baffle and the end surface of the wheel hub.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The utility model provides an anti-oil leakage structure for a converter secondary reducer, in which an annular groove is arranged on the shaft sleeve to realize the oil collecting function, and has a simple structure and is convenient for processing.

[0018] 2. The utility model provides an anti-leakage oil structure for the secondary reducer of the converter. An oil collecting chamber and an oil collecting groove are arranged on the oil seal gland. At the same time, oil return holes are arranged on the transparent cover and the bearing seat respectively to realize oil collection and oil return. The structure is simple and the processing is convenient.

[0019] 3. Compared with adding an oil collecting cover on the outside, the utility model has a smaller spatial structure and is easy to manufacture and disassemble.

[0020] 4. The gap between the shaft sleeve and the oil seal gland of the utility model can prevent oil mist from overflowing and external dust from entering.

[0021] 5. The utility model has a U-shaped groove on the end of the second oil return hole close to the first oil return hole, and the U-shaped groove is connected with the first oil return hole to form an oil storage bend. Oil is always stored in the oil storage bend, which can prevent oil mist in the box from dispersing from the oil return hole.

[0022] Based on the above reasons, the utility model can be widely promoted in the fields of converter secondary reducers, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a schematic cross-sectional view of the output end structure of the secondary reducer of the utility model.

[0025] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle X area.

[0026] Figure 3 It is a schematic cross-sectional view of the structure of the shaft sleeve of the utility model.

[0027] Figure 4 for Figure 3 Schematic diagram of a partial enlargement of the middle Y area.

[0028] Figure 5 It is a schematic cross-sectional view of the structure of the oil seal gland of the utility model.

[0029] Figure 6 It is a schematic diagram of the partial structure of the oil seal gland of the utility model.

[0030] Figure 7 It is a schematic cross-sectional view of the structure of the transparent cover of the utility model.

[0031] Figure 8It is a schematic cross-sectional view of the structure of the bearing seat of the utility model.

[0032] Fig. 9 It is a partial structural schematic diagram of the bearing seat of the utility model.

[0033] In the figure: 1. shaft sleeve; 2. oil seal gland; 3. transparent cover; 4. bearing seat; 5. wheel hub; 6. O-ring one; 7. oil seal; 8. O-ring two; 9. bearing; 10. shaft end baffle; 111. annular groove; 112. end face one; 113. end face two; 211. oil collecting groove; 212. bolt hole; 213. oil collecting chamber; 311. end face three; 312. end face four; 313. first oil return hole; 411. second oil return hole; 412. U-shaped groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The utility model provides an anti-leakage oil structure for a converter secondary reducer, and relates to a converter tilting device secondary reducer, specifically an anti-leakage oil structure for a converter tilting device secondary reducer, which is composed of a secondary reducer housing, a shaft sleeve, an oil seal gland, a bearing cover, a bearing seat, etc. It is applied to a converter secondary reducer to solve the problem of oil leakage at the shaft end of the secondary reducer. The anti-leakage oil structure of the utility model is located on the outside of the secondary reducer oil seal, and can collect the oil seeping from the oil seal and return it to the secondary reducer housing through the oil return hole of the bearing seat, so as to prevent the oil from leaking out of the outside of the secondary reducer and eliminate the problem of oil leakage in the secondary reducer.

[0036] like Figure 1As shown, the utility model is an anti-leakage structure for a converter secondary reducer, comprising a sleeve 1, an oil seal gland 2, a transparent cover 3, and a bearing seat 4. An oil seal 7 is arranged between the inner ring of the transparent cover 3 and the outer ring of the sleeve 1. The sleeve 1 is sleeved on the outer ring of the hub 5 and installed on the inner ring of the oil seal 7, the oil seal gland 2 is fixed on the transparent cover 3, the inner hole of the oil seal gland 2 is matched and connected with the outer ring of the sleeve 1, the stop end face of the oil seal gland 2 presses the oil seal 7, the transparent cover 3 is fixed on the bearing seat 4, the bearing seat 4 is installed on the outside of the bearing 9 and fixed on the secondary reducer housing. An annular groove 111 is provided on the inclined surface of the outer ring of the sleeve 1 for receiving and collecting oil. An oil collecting groove 211 is provided at the bottom of the oil seal gland 2, a first oil return hole 313 is provided at the bottom of the transparent cover 3, and a second oil return hole 411 is provided at the bottom of the bearing seat 4. One end of the first oil return hole 313 on the transparent cover 3 is connected to the oil collecting groove 211 at the bottom of the oil seal gland 2 , and the other end is connected to the second oil return hole 411 of the bearing seat 4 .

[0037] The oil leakage prevention structure is based on a basic sealing structure, namely, an O-ring 6 between the outer ring of the hub 5 and the inner ring of the shaft sleeve 1, a double J back-to-back oil seal 7 between the inner ring of the transparent cover 3 and the outer ring of the shaft sleeve 1, and an O-ring 8 between the stopper of the transparent cover 3 and the inner ring of the housing bearing seat 4.

[0038] like Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the gap between the shaft sleeve 1 and the oil seal gland 2 forms a non-contact sealing structure. The oil seeping from the oil seal 7 flows into the annular groove 111 on the shaft sleeve 1, and drips into the oil collecting groove 211 of the oil seal gland 2 by gravity, and then flows back to the interior of the secondary reducer housing through the first oil return hole 313 on the transparent cover 3 and the second oil return hole 411 of the bearing seat 4.

[0039] The shaft diameters on both sides of the annular groove 111 are different, and the shaft diameter on the side close to the oil seal 7 is larger, which is convenient for installing the oil seal 7.

[0040] The left end face 112 of the sleeve 1 is close to the inner ring end face of the bearing 9, and the right end face 113 is pressed by the shaft end baffle 10. The shaft end baffle 10 is fixed to the wheel hub 5 by bolts evenly distributed on the circumference. There is a 1mm gap between the end face of the shaft end baffle 10 and the end face of the wheel hub 5 to ensure that the sleeve 1 is in a pressed state.

[0041] The oil seal gland 2 is fixed to the transparent cover 3 by multiple bolts, and the oil seal 7 is pressed against the end face of the stopper. The inner hole of the oil seal gland 2 is provided with a bevel, and the inclination angle of the bevel is the same as the inclination angle of the bevel of the annular groove 111 of the outer ring of the sleeve 1, so as to ensure the gap between the inner hole of the oil seal gland 2 and the outer ring of the sleeve 1.

[0042] like Figure 2As shown, an oil collecting chamber 213 is provided inside the oil seal cover 2 near the oil seal 7, and the oil collecting chamber 213 is located in the gap. The annular groove 111 and the oil collecting groove 211 are both connected to the oil collecting chamber 213, and the axial position of the annular groove 111 on the sleeve 1 should be inside the oil collecting chamber 213 of the oil seal cover 2.

[0043] like Figure 5 , Figure 6 As shown, the oil collecting groove 211 opened at the bottom of the oil seal gland 2 needs to avoid the bolt engaging hole (bolt hole 212), and the oil seal gland 2 is fixedly connected to the transparent cover 3 through multiple bolt holes 212 and bolts.

[0044] like Figure 1 , Figure 7 As shown, the left end face 311 of the transparent cover 3 is tightly attached to the outer ring end face of the bearing 9, and the right end face 312 is the fitting surface of the oil seal gland 2, that is, the end face 312 is fitted and connected to the end face of the oil seal gland 2, and the first oil return hole 313 opened at the bottom of the transparent cover 3 needs to avoid the bolt fitting hole on the transparent cover 3.

[0045] The transparent cover 3 is fixed to the bearing seat 4 by bolts.

[0046] like Figure 1 , Figure 8 , Fig. 9 As shown, a U-shaped groove 412 is provided on the second oil return hole 411 of the bearing seat 4 near the right end of the first oil return hole 313. The U-shaped groove 412 is connected with the first oil return hole 313 to form an oil storage bend. Oil is always stored in the oil storage bend to prevent the oil mist in the box from escaping from the oil return hole. The second oil return hole 411, the U-shaped groove 412, and the first oil return hole 313 are connected in sequence, and the U-shaped groove 412 is located at the connection between the second oil return hole 411 and the first oil return hole 313. The bottom of the U-shaped groove 412 is lower than the second oil return hole 411.

[0047] The gap between the shaft sleeve 1 and the oil seal gland 2 of the utility model can prevent oil mist from overflowing and external dust from entering.

[0048] The converter tilting device is a key component in the converter steelmaking equipment. It plays a key role in the smooth tilting and accurate positioning of the furnace body. The continuous and stable operation of the converter tilting device is directly related to the production progress of the steelmaking production line. The application of the utility model in the converter tilting device can reduce the frequent maintenance and replacement of the converter and reduce the after-sales maintenance costs.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An oil leakage prevention structure for a converter secondary reducer, characterized in that: The invention comprises a shaft sleeve (1), an oil seal gland (2), a transparent cover (3) and a bearing seat (4); an oil seal (7) is arranged between the inner ring of the transparent cover (3) and the outer ring of the shaft sleeve (1); the shaft sleeve (1) is sleeved on the outer ring of the wheel hub (5) and installed on the inner ring of the oil seal (7); an end face (112) on one side of the shaft sleeve (1) is closely attached to the inner ring end face of the bearing (9); an end face (113) on the other side is pressed by a shaft end baffle (10); the shaft end baffle (112) is tightly attached to the inner ring end face of the bearing (9); 0) is fixed on the wheel hub (5), the oil seal gland (2) is fixed on the transparent cover (3), the inner hole of the oil seal gland (2) is matched and connected with the outer ring of the shaft sleeve (1), the stop end face of the oil seal gland (2) presses the oil seal (7), the transparent cover (3) is fixed on the bearing seat (4), one side end face three (311) of the transparent cover (3) is tightly attached to the outer ring end face of the bearing (9), and the other side end face four (312) is the fitting surface of the oil seal gland (2); The outer ring of the shaft sleeve (1) is provided with an annular groove (111), the bottom of the oil seal gland (2) is provided with an oil collecting groove (211), the bottom of the transparent cover (3) is provided with a first oil return hole (313), and the bottom of the bearing seat (4) is provided with a second oil return hole (411), the annular groove (111) is in communication with the oil collecting groove (211), one end of the first oil return hole (313) is in communication with the oil collecting groove (211), and the other end is in communication with the second oil return hole (411), and the second oil return hole (411) is in communication with the interior of the secondary reducer housing.

2. The oil leakage prevention structure for the converter secondary reducer according to claim 1 is characterized in that: A U-shaped groove (412) is provided on the end of the second oil return hole (411) close to the first oil return hole (313), and the U-shaped groove (412) is connected to the first oil return hole (313) to form an oil storage bend.

3. The oil leakage prevention structure for the converter secondary reducer according to claim 1 is characterized in that: The outer ring of the shaft sleeve (1) has a first inclined surface, and the annular groove (111) is opened on the first inclined surface.

4. The oil leakage prevention structure for the converter secondary reducer according to claim 1 or 3, characterized in that: The shaft diameters on both sides of the annular groove (111) are different, with the shaft diameter on the side close to the oil seal (7) being larger.

5. The oil leakage prevention structure for the converter secondary reducer according to claim 3 is characterized in that: The inner hole of the oil seal gland (2) is provided with a second inclined surface, and the inclination angle of the second inclined surface is the same as the inclination angle of the first inclined surface where the annular groove (111) is located.

6. The oil leakage prevention structure for the converter secondary reducer according to claim 1, characterized in that: The gap between the outer ring of the shaft sleeve (1) and the oil seal gland (2) forms a non-contact sealing structure. An oil collecting chamber (213) is provided inside the oil seal gland (2) near the oil seal (7). The oil collecting chamber (213) is located in the gap. The annular groove (111) and the oil collecting groove (211) are both in communication with the oil collecting chamber (213).

7. The oil leakage prevention structure for the converter secondary reducer according to claim 6 is characterized in that: The annular groove (111) is axially located inside the oil collecting chamber (213).

8. The oil leakage prevention structure for the converter secondary reducer according to claim 1, characterized in that: The oil seal pressure cover (2) is provided with a plurality of bolt holes (212) along a circumferential direction; the oil seal pressure cover (2) is fixedly connected to the transparent cover (3) via the plurality of bolt holes (212) and bolts; and the transparent cover (3) is fixed to the bearing seat (4) via bolts.

9. The oil leakage prevention structure for the converter secondary reducer according to claim 1, characterized in that: An O-ring 1 (6) is provided between the inner ring of the shaft sleeve (1) and the outer ring of the wheel hub (5), and an O-ring 2 (8) is provided between the stopper of the transparent cover (3) and the inner ring of the bearing seat (4).

10. The oil leakage prevention structure for the converter secondary reducer according to claim 1, characterized in that: The shaft end baffle (10) is fixed to the wheel hub (5) by means of bolts evenly distributed on the circumference, and a gap of 1 mm is provided between the end surface of the shaft end baffle (10) and the end surface of the wheel hub (5).

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