Fan grease injection shaft seal device

Abstract

The utility model relates to the technical field of fan manufacturing especially is concerned on a kind of fan grease injection shaft seal device, it includes sealing body, the sealing body is installed on the shell by first fixed bolt, multiple beef tallow packing are installed in the sealing body, the sealing body is also equipped with the compacting mechanism that the beef tallow packing is compacted to it on.Being installed when the shaft seal device, sealing body is installed to shell first, then install beef tallow packing, finally compacting mechanism is installed to sealing body, realize the fixation of beef tallow packing;Further make the dismounting of shaft seal device more convenient, and the setting of beef tallow packing makes the sealing effect of shaft seal better effect.

Description

Technical Field

[0001] This utility model relates to the technical field of fan manufacturing, and in particular to a fan grease injection shaft seal device. Background Technology

[0002] During operation, centrifugal fans require varying levels of sealing performance depending on the composition of the medium passing through them. External leakage at the shaft seal is common during operation, leading to environmental pollution. Existing induced draft fan shaft seals generally employ packing seals, labyrinth seals, or combined shaft seals. However, when the gas medium passing through the fan contains dust or water, these seals typically suffer from limited effectiveness and inconvenient disassembly and replacement. Utility Model Content

[0003] To improve the sealing effect of the shaft seal and facilitate disassembly and assembly, this application provides a grease injection shaft seal device for a fan.

[0004] This application provides a grease injection shaft seal device for a fan, which adopts the following technical solution: A fan grease injection shaft seal device includes a sealing body, which is mounted on a housing by a first fixing bolt. Multiple tallow packings are installed inside the sealing body, and a clamping mechanism for pressing the tallow packings is also installed on the sealing body.

[0005] By adopting the above technical solution, when installing the shaft seal device, the sealing body is first installed on the machine housing, then the grease packing is installed, and finally the clamping mechanism is installed on the sealing body to fix the grease packing; thus, the disassembly and assembly of the shaft seal device is more convenient, and the setting of the grease packing makes the sealing effect of the shaft seal better.

[0006] Optionally, the clamping mechanism includes an inner pressure cover and an outer pressure cover. The inner pressure cover is installed on the sealing body at one end near the housing by a second fixing bolt, and the outer pressure cover is installed on the sealing body at one end away from the housing by a third fixing bolt.

[0007] By adopting the above technical solution, if all the tallow packing is pressed on the outside, when there are many tallow packings, the outer tallow packings will be subjected to greater force, while the inner tallow packings will be subjected to less force. After tightening the bolts, they will loosen after a short time, thus affecting the sealing effect. However, by using inner and outer pressure caps to fix the tallow packings, the force on all the tallow packings is more even, reducing the probability of the tallow packings loosening.

[0008] Optionally, the first fixing bolt, the second fixing bolt, and the third fixing bolt are arranged alternately and at intervals.

[0009] By adopting the above technical solution, the staggered arrangement of the first fixing bolt, the second fixing bolt, and the third fixing bolt makes the installation and disassembly of the sealing body, the inner pressure cover, and the outer pressure cover more convenient. Furthermore, the staggered arrangement makes the force on the entire device more uniform, resulting in better sealing performance of the entire device.

[0010] Optionally, there is a gap between the inner pressure cap and the sealing body, and there is also a gap between the outer pressure cap and the sealing body.

[0011] By adopting the above technical solution, the gap between the inner and outer pressure caps and the sealing body allows for space between the inner and outer pressure caps and the sealing body when the packing is tightened, facilitating subsequent tightening.

[0012] Optionally, two mounting grooves are provided on the side wall of the sealing body, and grease nipples are installed in both mounting grooves. A sealing spacer ring is also installed in the sealing body, and a boss is integrally formed on the inner side wall of the sealing body.

[0013] By adopting the above technical solution, the installation groove and grease nipple enable the injection of lubricating oil into the sealing body, and the sealing spacer reduces the overflow of lubricating oil into the sealing body; the boss ensures that the sealing spacer will not affect the oil injection effect due to movement.

[0014] Optionally, an annular groove is formed on the peripheral sidewall of the sealing spacer, a plurality of first connecting grooves are formed on the bottom wall of the annular groove, and a plurality of second connecting grooves are formed on the sidewall of the sealing spacer, the plurality of second connecting grooves being connected to the plurality of first connecting grooves respectively.

[0015] By adopting the above technical solution, when oil is injected, the lubricating oil enters the mounting groove through the grease nipple, then enters the annular groove through the mounting groove, and then enters the sealing body through the first connecting groove and the second connecting groove. The setting of multiple first connecting grooves and multiple second connecting grooves facilitates the lubricating oil to overflow evenly from the circumference during oil injection, and can replenish oil around the grease packing, effectively improving the service life and sealing effect of the grease packing.

[0016] Optionally, the grease fitting includes a mounting body, one end of which has an external thread, and the mounting groove has an internal thread. The mounting body is threadedly connected to the mounting groove. The mounting body has a first oil inlet groove and a second oil inlet groove inside. A spring is fixedly connected to the bottom wall of the first oil inlet groove, and a check ball is fixedly connected to the other end of the spring.

[0017] By adopting the above technical solution, when adding lubricating oil, the nozzle of the grease gun is placed on the grease nipple. The high-pressure lubricating oil generated by the grease gun drives the check ball to slide, thereby allowing the lubricating oil to enter the first oil inlet groove. At the same time, the spring setting reduces the probability of lubricating oil backflow.

[0018] In summary, this application includes the following beneficial technical effects: 1. When installing the seal, first install the part closest to the housing, then install the sealing ring and grease packing in sequence, press the inner pressure cap to tighten this part, then install the seal body onto the housing, then install the outer grease packing, and finally install the outer pressure cap. This structure facilitates the replacement of the grease packing, facilitates the improvement of sealing performance through oil lubrication, and is easy to disassemble and assemble. Field use has verified that it has a good sealing effect. 2. If all the tallow packing is tightened on the outside, when there are many tallow packings, the outer tallow packings will be under greater stress, while the inner tallow packings will be under less stress. After tightening the bolts, they will loosen soon, thus affecting the sealing effect. However, by using inner and outer pressure caps to fix the tallow packings, the stress on all the tallow packings is more even, reducing the probability of the tallow packings loosening. 3. The staggered arrangement of the first, second, and third fixing bolts makes the installation and disassembly of the sealing body, inner pressure cover, and outer pressure cover more convenient, and the staggered arrangement makes the stress on the entire device more uniform, resulting in better sealing performance of the entire device. 4. The gaps between the inner and outer pressure caps and the sealing body allow for space between the inner and outer pressure caps and the sealing body when the packing is tightened, facilitating subsequent tightening. 5. The installation groove and grease nipple enable the injection of lubricating oil into the sealing body, and the sealing spacer reduces the overflow of lubricating oil into the sealing body; the boss ensures that the sealing spacer will not affect the oil injection effect due to movement. 6. The design of multiple first connecting grooves and multiple second connecting grooves facilitates the even overflow of lubricating oil from the circumference during oil filling, ensuring that oil can be replenished around the tallow packing, effectively improving the service life and sealing effect of the tallow packing. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the fan grease injection shaft seal device in an embodiment of this application; Figure 2 This is a side view of the fan grease injection shaft seal device in an embodiment of this application; Figure 3 This is a schematic diagram of the sealing spacer structure in an embodiment of this application; Figure 4 This is a diagram showing the installation position of the grease nipple in an embodiment of this application; Figure 5 This is a cross-sectional view of the grease nipple in an embodiment of this application.

[0020] Reference numerals: 1. Housing; 2. Sealing body; 21. Mounting groove; 3. First fixing bolt; 4. Clamping mechanism; 41. Inner pressure cover; 42. Outer pressure cover; 43. Second fixing bolt; 44. Third fixing bolt; 5. Butter packing; 6. Sealing spacer ring; 61. Annular groove; 62. First connecting groove; 63. Second connecting groove; 7. Grease nipple; 71. Mounting body; 711. First oil inlet groove; 712. Second oil inlet groove; 72. Spring; 73. Check ball; 8. Boss. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0022] This application discloses a fan grease injection shaft seal device.

[0023] refer to Figure 1 The fan grease injection shaft seal device includes a sealing body 2, which is mounted on the housing 1 by multiple first fixing bolts 3. Multiple tallow packings 5 ​​are installed inside the sealing body 2, and a pressing mechanism 4 is also installed on the sealing body 2 to press the tallow packings 5.

[0024] When installing the shaft seal device, first install the sealing body 2 onto the housing 1, then install the hemp packing 5, and finally install the clamping mechanism 4 onto the sealing body 2 to fix the hemp packing 5; this makes the installation and removal of the shaft seal device more convenient, and the setting of the hemp packing 5 makes the sealing effect of the shaft seal better.

[0025] refer to Figure 1 and Figure 2 The pressing mechanism 4 includes an inner pressure cover 41 and an outer pressure cover 42. The inner pressure cover 41 is installed on the end of the sealing body 2 near the housing 1 by a plurality of second fixing bolts 43, and the outer pressure cover 42 is installed on the end of the sealing body 2 away from the housing 1 by a plurality of third fixing bolts 44. The plurality of first fixing bolts 3, the plurality of second fixing bolts 43 and the plurality of third fixing bolts 44 are arranged alternately and at intervals.

[0026] If all the packing is tightened on the outside, when there are many tallow packings 5, the outermost tallow packings 5 ​​will be under greater force, while the innermost tallow packings 5 ​​will be under less force. After tightening the bolts, they will loosen soon, thus affecting the sealing effect. However, by using an inner pressure cap 41 and an outer pressure cap 42 to fix the tallow packings 5, the force on all the tallow packings 5 ​​is more even, reducing the probability of the tallow packings 5 ​​loosening. Furthermore, the staggered arrangement of the first fixing bolt 3, the second fixing bolt 43, and the third fixing bolt 44 makes the installation and removal of the sealing body 2, the inner pressure cap 41, and the outer pressure cap 42 more convenient, and the staggered arrangement makes the force on the entire device more even, resulting in better sealing performance of the entire device.

[0027] There is a large gap between the inner pressure cap 41 and the sealing body 2, and there is also a large gap between the outer pressure cap 42 and the sealing body 2. The gap between the inner pressure cap 41 and the outer pressure cap 42 and the sealing body 2 allows for space between the inner pressure cap 41 and the outer pressure cap 42 and the sealing body 2 when the packing is tightened, which facilitates subsequent tightening.

[0028] refer to Figure 1 and Figure 3 The sealing body 2 is also equipped with a sealing ring 6. The inner sidewall of the sealing body 2 is integrally formed with a boss 8. The circumferential sidewall of the sealing ring 6 is provided with an annular groove 61. The bottom wall of the annular groove 61 is provided with a plurality of first connecting grooves 62. The sidewall of the sealing ring 6 is provided with a plurality of second connecting grooves 63. The plurality of second connecting grooves 63 are respectively connected to the plurality of first connecting grooves 62.

[0029] The sealing spacer 6 reduces the overflow of lubricating oil in the sealing body 2; the boss 8 ensures that the sealing spacer 6 will not affect the oil injection effect due to displacement; when oil is injected, the lubricating oil enters the annular groove 61, and then enters the sealing body 2 through the first connecting groove 62 and the second connecting groove 63; the multiple first connecting grooves 62 and multiple second connecting grooves 63 facilitate the lubricating oil to overflow evenly from the circumference during oil injection, replenishing oil around the tallow packing 5, effectively improving the service life and sealing effect of the tallow packing 5.

[0030] refer to Figure 4 and Figure 5 Two mounting grooves 21 are provided on the side wall of the sealing body 2. The two mounting grooves 21 are symmetrically arranged and each of them is equipped with a grease nipple 7. The grease nipple 7 includes a mounting body 71. One end of the mounting body 71 is provided with an external thread, and the mounting groove 21 is provided with an internal thread. The mounting body 71 is threadedly connected to the mounting groove 21. The mounting body 71 is provided with a first oil inlet groove 711 and a second oil inlet groove 712. The diameter of the first oil inlet groove 711 is larger than the diameter of the second oil inlet groove 712. A spring 72 is fixedly connected to the bottom wall of the first oil inlet groove 711, and a check ball 73 is fixedly connected to the other end of the spring 72.

[0031] When adding lubricating oil, the nozzle of the grease gun is placed on the grease nipple 7. The high-pressure lubricating oil generated by the grease gun causes the check ball 73 to slide, thereby allowing the lubricating oil to enter the first oil inlet groove 711. At the same time, the spring 72 reduces the probability of lubricating oil backflow.

[0032] The implementation principle of the fan grease injection shaft seal device in this application embodiment is as follows: During the seal installation, first install the part near the housing 1, then install the sealing ring 6 and the grease packing 5 in sequence, press the part with the inner pressure cover 41, then install the sealing body 2 onto the housing 1, then install the outer grease packing 5, and finally install the outer pressure cover 42. This structure facilitates the replacement of the grease packing 5, facilitates the improvement of sealing performance through oil lubrication, and is easy to disassemble and assemble. Through field use verification, it has a good sealing effect.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fan grease injection shaft seal device, characterized in that, Includes a sealing body (2), which is mounted on the housing (1) by a first fixing bolt (3). Multiple tallow packings (5) are installed inside the sealing body (2), and a pressing mechanism (4) is also installed on the sealing body (2) to press the tallow packings (5).

2. The fan grease injection shaft seal device according to claim 1, characterized in that, The pressing mechanism (4) includes an inner pressure cover (41) and an outer pressure cover (42). The inner pressure cover (41) is installed on the sealing body (2) near the housing (1) by a second fixing bolt (43). The outer pressure cover (42) is installed on the sealing body (2) away from the housing (1) by a third fixing bolt (44).

3. The fan grease injection shaft seal device according to claim 2, characterized in that, The first fixing bolt (3), the second fixing bolt (43) and the third fixing bolt (44) are arranged alternately.

4. The fan grease injection shaft seal device according to claim 2, characterized in that, There is a gap between the inner pressure cap (41) and the sealing body (2), and there is also a gap between the outer pressure cap (42) and the sealing body (2).

5. The fan grease injection shaft seal device according to claim 1, characterized in that, The sealing body (2) has two mounting grooves (21) on its side wall, and each of the two mounting grooves (21) is fitted with a grease nipple (7). The sealing body (2) is also fitted with a sealing spacer (6). The inner side wall of the sealing body (2) is integrally formed with a boss (8).

6. The fan grease injection shaft seal device according to claim 5, characterized in that, The sealing ring (6) has an annular groove (61) on its peripheral sidewall, and a plurality of first connecting grooves (62) on the bottom wall of the annular groove (61). The sealing ring (6) has a plurality of second connecting grooves (63) on its sidewall, and the plurality of second connecting grooves (63) are respectively connected to the plurality of first connecting grooves (62).

7. The fan grease injection shaft seal device according to claim 6, characterized in that, The grease fitting (7) includes a mounting body (71), one end of which is provided with an external thread, and the mounting groove (21) is provided with an internal thread. The mounting body (71) is connected to the mounting groove (21) by a thread. The mounting body (71) is provided with a first oil inlet groove (711) and a second oil inlet groove (712). A spring (72) is fixedly connected to the bottom wall of the first oil inlet groove (711), and a check ball (73) is fixedly connected to the other end of the spring (72).

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