Fan impeller shaft sleeve oil seal sealing device

Abstract

The utility model provides a fan impeller shaft sleeve oil seal sealing device which comprises an oil seal seat sleeved on an impeller shaft sleeve and an oil seal seat fixing plate fixed on a fan volute, and a framework oil seal sleeved on the impeller shaft sleeve is arranged between the oil seal seat and the oil seal seat fixing plate. The oil seal seat and the oil seal seat fixing plate are fixed through a fixing screw rod; the tail gas fan of the heating medium station is modified, the sealing device is added on the premise that the fan is not replaced to solve the problems of condensate and gas leakage, and cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan impeller shaft sleeve oil seal technology field especially a fan impeller shaft sleeve oil seal sealing device. BACKGROUND

[0002] The heat medium station tail gas fan is not suitable for conveying the gas with condensate because of the gap between the volute and the impeller shaft sleeve without sealing device, and the motor shaft is directly connected to the middle of the impeller, and the blowback small impeller is designed, so that the online modification has no space to implement, and the condensate and gas cannot be completely treated under the premise of not disassembling and modifying, which causes environmental pollution and leads to unqualified environmental protection inspection. Considering the current situation of the equipment, the cost of replacing the fan to solve the problem will be high, and in order to save the cost, the sealing device needs to be added to solve the problem of condensate and gas leakage under the premise of not replacing the fan. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the problem that the existing heat medium station tail gas fan is not suitable for conveying the gas with condensate, and proposes a fan impeller shaft sleeve oil seal sealing device, which is used for modifying the heat medium station tail gas fan, and solving the problem of condensate and gas leakage by adding a sealing device under the premise of not replacing the fan, thereby saving the cost.

[0004] In order to achieve the above purpose, the following technical scheme is proposed:

[0005] A fan impeller shaft sleeve oil seal sealing device, comprising an oil seal seat sleeved on the impeller shaft sleeve and an oil seal seat fixing plate fixed on the fan volute, a skeleton oil seal sleeved on the impeller shaft sleeve is arranged between the oil seal seat and the oil seal seat fixing plate, and the oil seal seat and the oil seal seat fixing plate are fixed through a fixing screw.

[0006] The fixing screw can adjust the pressure on the oil seal seat to ensure the effectiveness of the sealing, and the condensate generated by the fan tail gas has a lubricating effect on the oil seal sealing surface, so that the service life of the oil seal can be prolonged without adding lubricating medium. If the oil seal needs to be replaced due to wear and tear, the new oil seal can be easily installed in the oil seal seat by cutting the old oil seal in half and tightening the fixing bolt.

[0007] Preferably, the oil seal seat fixing plate and the fan volute are welded and fixed, and a ring of welding layers is arranged at the welding seam.

[0008] The oil seal seat fixing plate is fixed with the fan volute by welding, in order to avoid tail gas leakage, full welding is performed at the welding seam of the oil seal seat fixing plate and the fan volute, and a welding layer is obtained.

[0009] Preferably, the main body of the oil seal seat is a circular disc, and the inner ring of the oil seal seat is coaxially arranged with the main body and has a diameter slightly larger than the outer diameter of the impeller shaft sleeve.

[0010] The main body of the oil seal seat is a circular disc, the diameter of the inner ring of the oil seal seat is slightly larger than the outer diameter of the impeller shaft sleeve, and the difference between the diameter of the inner ring of the oil seal seat and the outer diameter of the impeller shaft sleeve is between 1 mm and 3 mm.

[0011] Preferably, the oil seal seat is provided with a ring groove for clamping the skeleton oil seal, the ring groove is coaxially arranged with the inner ring of the oil seal seat, the inner diameter of the ring groove is the same as the outer diameter of the skeleton oil seal, and the depth of the ring groove is between one half and two thirds of the thickness of the oil seal seat.

[0012] The oil seal seat is provided with a ring groove, the ring groove is used for clamping the skeleton oil seal, the inner ring of the oil seal seat is coaxially arranged with the ring groove, the outer diameter of the skeleton oil seal is the same as the inner diameter of the ring groove, and the depth of the ring groove is between one half of the thickness of the oil seal seat and two thirds of the thickness of the oil seal seat.

[0013] Preferably, the oil seal seat is provided with a plurality of bolt holes, the oil seal fixing plate is provided with a plurality of threaded holes corresponding to the positions of the bolt holes, and the fixing screw rod is threadedly connected with the threaded holes of the oil seal fixing plate through the bolt holes of the oil seal seat.

[0014] Preferably, the bolt holes are uniformly distributed on the oil seal seat along the axis of the oil seal seat.

[0015] Preferably, the main body of the skeleton oil seal is a ring body, the inner diameter of the ring body is the same as the outer diameter of the impeller shaft sleeve, the inner wall of the skeleton oil seal has a sealing lip outward, and the skeleton oil seal has a skirt on the outer side.

[0016] The skeleton oil seal body is in the shape of a ring body, the inner diameter of the skeleton oil seal is consistent with the outer diameter of the impeller shaft sleeve, the inner wall of the skeleton oil seal is externally provided with an extended sealing lip, and the outer lateral wall of the skeleton oil seal is provided with a skirt which is perpendicular to the ring body.

[0017] Preferably, the thickness of the sealing lip gradually decreases from inside to outside, and the end of the skirt is provided with a row of stoppers extending towards the impeller shaft sleeve.

[0018] The thickness of the sealing lip gradually decreases from the inner wall of the skeleton oil seal to the outside, and the excess condensate generated by the fan tail gas is shovelled towards the ring body, so that the excess condensate is prevented from overflowing from the oil seal sealing surface of the skeleton oil seal and the impeller shaft sleeve.

[0019] The utility model discloses the fixed screw can adjust the pressure to the oil seal seat to guarantee the effectiveness of sealing, and the condensate generated by the fan tail gas has the lubricating effect on the oil seal sealing surface, so the service life of the oil seal can be prolonged without adding lubricating medium. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall device structure diagram of the utility model.

[0021] Figure 2 It is the oil seal seat structure schematic view of the utility model.

[0022] Among them: 1, oil seal seat, 2, skeleton oil seal, 3, impeller shaft sleeve, 4, fixed screw, 5, oil seal seat fixed plate, 6, inner ring, 7, ring groove, 8, bolt hole. DETAILED DESCRIPTION

[0023] Example 1:

[0024] The embodiment provides a fan impeller shaft sleeve oil seal sealing device, referring to Figure 1 , including oil seal seat 1, skeleton oil seal 2, fixed screw 4 and oil seal seat fixed plate 5, the oil seal seat fixed plate 5 is fixed on the fan volute, the oil seal seat 1 is set on the impeller shaft sleeve 3, the skeleton oil seal 2 is clamped between the oil seal seat 1 and the oil seal seat fixed plate 5, and the skeleton oil seal 2 is set on the impeller shaft sleeve 3, and the fixed screw 4 is used for fixing the oil seal seat 1 and the oil seal seat fixed plate 5 and adjusting the compression force of the skeleton oil seal 2.

[0025] The fixed screw rod can adjust the pressure on the oil seal seat to ensure the effectiveness of the sealing, and the condensate generated by the fan tail gas has a lubricating effect on the oil seal sealing surface, so that the service life of the oil seal can be prolonged without adding lubricating medium.

[0026] The main body shape of the oil seal seat 1 is a circular disc, the diameter of the inner ring 6 of the oil seal seat 1 is slightly larger than the outer diameter of the impeller shaft sleeve 3, and the difference between the diameter of the inner ring 6 of the oil seal seat 1 and the outer diameter of the impeller shaft sleeve 3 is between 1mm and 3mm.

[0027] The main body shape of the skeleton oil seal 2 is a ring body, the inner diameter of the skeleton oil seal 2 is consistent with the outer diameter of the impeller shaft sleeve 3, the inner wall of the skeleton oil seal 2 is provided with an extended sealing lip, and the outer side wall of the skeleton oil seal 2 has a skirt which is perpendicular to the ring body.

[0028] Reference Figure 2 The oil seal seat 1 is provided with a plurality of bolt holes 8, the oil seal seat fixing plate 5 is provided with a plurality of threaded holes at positions corresponding to the bolt holes 8, and the fixed screw rod 4 is first threaded through the bolt holes 8 of the oil seal seat 1 and then threadedly connected with the threaded holes of the oil seal seat fixing plate 5. The position of the oil seal seat 1 and the compression force of the skeleton oil seal 2 are adjusted by adjusting the distance between the fixed screw rod 4 and the threaded holes.

[0029] The plurality of bolt holes 8 are axially symmetrical along the axis of the oil seal seat 1 and are evenly distributed on the oil seal seat 1.

[0030] Embodiment 2:

[0031] The oil seal seat fixing plate 5 is structurally optimized based on embodiment 1, and a fan impeller shaft sleeve oil seal sealing device is provided, which refers to Figure 1 , comprising an oil seal seat 1, a skeleton oil seal 2, a fixed screw rod 4 and an oil seal seat fixing plate 5, the oil seal seat fixing plate 5 is fixed on the fan volute, the oil seal seat 1 is sleeved on the impeller shaft sleeve 3, the skeleton oil seal 2 is clamped between the oil seal seat 1 and the oil seal seat fixing plate 5, and the skeleton oil seal 2 is sleeved on the impeller shaft sleeve 3, and the fixed screw rod 4 is used for fixing the oil seal seat 1 and the oil seal seat fixing plate 5 and adjusting the compression force of the skeleton oil seal 2.

[0032] The fixed screw rod can adjust the pressure on the oil seal seat to ensure the effectiveness of the sealing, and the condensate generated by the tail gas of the fan has a lubricating effect on the sealing surface of the oil seal, so the service life of the oil seal can be prolonged without adding lubricating medium.

[0033] The oil seal seat fixing plate 5 is fixed with the fan volute by welding, in order to avoid tail gas leakage, the welding seam between the oil seal seat fixing plate 5 and the fan volute is full-welded to eliminate leakage, and a welding layer is obtained. The original fan impeller shaft sleeve outer ring reinforcing plate, i.e. the oil seal seat fixing plate 5 of the utility model, is spot-welded on the fan volute, and tail gas is also easy to leak in the gap, so a full-welding machine is also needed to eliminate the leakage of the gap. Since the original fan motor is provided with a fan cooling wheel, and the temperature of the conveyed tail gas is not very high, the original fan motor with the fan cooling wheel is cancelled, so as to leave enough space for replacement and adjustment of the skeleton oil seal 2 and operation of the oil seal seat 1.

[0034] The main body of the oil seal seat 1 is a circular disc, the inner ring 6 of the oil seal seat 1 has a diameter slightly larger than the outer diameter of the impeller shaft sleeve 3, and the difference between the diameter of the inner ring 6 of the oil seal seat 1 and the outer diameter of the impeller shaft sleeve 3 is between 1 mm and 3 mm. The purpose of such a setting is to facilitate the sleeving of the oil seal seat 1 without scratching the impeller shaft sleeve 3, and to avoid increasing the additional friction force on the impeller shaft sleeve 3 after installation.

[0035] The main body of the oil seal seat 1 is a circular disc, the inner ring 6 of the oil seal seat 1 has a diameter slightly larger than the outer diameter of the impeller shaft sleeve 3, and the difference between the diameter of the inner ring 6 of the oil seal seat 1 and the outer diameter of the impeller shaft sleeve 3 is between 1 mm and 3 mm. The purpose of such a setting is to facilitate the sleeving of the oil seal seat 1 without scratching the impeller shaft sleeve 3, and to avoid increasing the additional friction force on the impeller shaft sleeve 3 after installation.

[0036] Reference Figure 2 The oil seal seat 1 is provided with a plurality of bolt holes 8, the oil seal fixing plate 5 is provided with a plurality of threaded holes at positions corresponding to the bolt holes 8, and the fixed screw rod 4 passes through the bolt hole 8 of the oil seal seat 1 first, and then is screwed with the threaded hole of the oil seal fixing plate 5. The position of the oil seal seat 1 and the pressing force on the skeleton oil seal 2 are adjusted by adjusting the distance between the fixed screw rod 4 and the threaded hole.

[0037] The plurality of bolt holes 8 are axially symmetrical along the axis of the oil seal seat 1 and are evenly distributed on the oil seal seat 1.

[0038] Embodiment 3:

[0039] This embodiment optimizes the structure of the oil seal seat 1 based on embodiment 2, and proposes a fan impeller shaft sleeve oil seal sealing device, which refers to Figure 1, including oil seal seat 1, skeleton oil seal 2, fixed screw rod 4 and oil seal seat fixed plate 5, the oil seal seat fixed plate 5 is fixed on the fan volute, the oil seal seat 1 is set on the impeller shaft sleeve 3, the skeleton oil seal 2 is clamped between the oil seal seat 1 and the oil seal seat fixed plate 5, and the skeleton oil seal 2 is set on the impeller shaft sleeve 3, and the fixed screw rod 4 is used to fix the oil seal seat 1 and the oil seal seat fixed plate 5 and adjust the compression force of the skeleton oil seal 2.

[0040] The fixed screw rod of the utility model can adjust the pressure on the oil seal seat to ensure the effectiveness of sealing, and the condensate generated by the fan tail gas has a lubricating effect on the oil seal sealing surface, so that the service life of the oil seal can be prolonged without adding lubricating medium. If the oil seal needs to be replaced due to wear and tear in the later period, the new oil seal can be conveniently installed in the oil seal seat by cutting open and pressing the fixed bolt, so that the oil seal can be quickly replaced.

[0041] The oil seal seat fixed plate 5 of the utility model is fixed with the fan volute by welding, in order to avoid tail gas leakage, the weld joint between the oil seal seat fixed plate 5 and the fan volute is fully welded to eliminate leakage, and a welding layer is obtained. The original fan impeller shaft sleeve outer ring reinforcing plate, i.e. the oil seal seat fixed plate 5 of the utility model, is spot welded on the fan volute, and the tail gas is also easy to leak in the gap, so a welding machine is also needed to fully weld the gap to eliminate leakage. Since the original fan motor is provided with a wind cooling wheel, and the temperature of the conveyed tail gas is not very high, the original fan motor with the wind cooling wheel is cancelled, so as to leave enough space for the replacement of the skeleton oil seal 2 and the operation of adjusting the oil seal seat 1.

[0042] The main body of the oil seal seat 1 is a circular disc, the inner ring 6 of the oil seal seat 1 has a diameter slightly larger than the outer diameter of the impeller shaft sleeve 3, and the difference between the diameter of the inner ring 6 of the oil seal seat 1 and the outer diameter of the impeller shaft sleeve 3 is between 1 mm and 3 mm. The purpose of the utility model is to facilitate the sleeve connection of the oil seal seat 1 without scratching the impeller shaft sleeve 3, and to avoid increasing the additional friction force on the impeller shaft sleeve 3 after installation.

[0043] Reference Figure 2 The oil seal seat 1 is provided with a ring groove 7, the ring groove 7 is used for clamping the skeleton oil seal 2, the inner ring 6 of the oil seal seat 1 is coaxially arranged with the ring groove 7, the outer diameter of the skeleton oil seal 2 is the same as the inner diameter of the ring groove 7, and the depth of the ring groove 7 is between one half of the thickness of the oil seal seat 1 and two thirds of the thickness of the oil seal seat 1. The purpose of the utility model is to reduce the influence of the self-weight deviation of the skeleton oil seal 2 on the eccentric wear of the impeller shaft sleeve 3 and increase the structural strength.

[0044] The utility model discloses a skeleton oil seal 2 main part appearance is ring body, the inner diameter of skeleton oil seal 2 is identical with the outer diameter of impeller shaft sleeve 3, and the inner wall of skeleton oil seal 2 is outwardly provided with the extended sealing lip, and the outer lateral wall of skeleton oil seal 2 has a skirt which is perpendicular to the ring body.

[0045] Reference Figure 2 The utility model discloses a oil seal seat 1 is equipped with a plurality of bolt hole 8, oil seal seat fixed plate 5 is equipped with a plurality of screw hole on the position of corresponding bolt hole 8, and fixed screw rod 4 first passes through the bolt hole 8 of oil seal seat 1, and then is connected with the screw thread of oil seal seat fixed plate 5 Screw thread. The position of oil seal seat 1 and the compression force of skeleton oil seal 2 are adjusted by adjusting the distance between fixed screw rod 4 and screw hole.

[0046] The plurality of bolt hole 8 of the utility model is axially symmetrical along the axis of oil seal seat 1 and is evenly distributed on oil seal seat 1.

[0047] Example 4:

[0048] This embodiment is based on the structure optimization of example 3 to skeleton oil seal 2, and a fan impeller shaft sleeve oil seal sealing device is provided, and reference Figure 1 , including oil seal seat 1, skeleton oil seal 2, fixed screw rod 4 and oil seal seat fixed plate 5, the oil seal seat fixed plate 5 is fixed on the fan volute, the oil seal seat 1 is set on the impeller shaft sleeve 3, the skeleton oil seal 2 is clamped between the oil seal seat 1 and the oil seal seat fixed plate 5, and the skeleton oil seal 2 is set on the impeller shaft sleeve 3, and the fixed screw rod 4 is used for fixing the oil seal seat 1 and the oil seal seat fixed plate 5 and adjusting the compression force of the skeleton oil seal 2.

[0049] The utility model fixed screw rod can adjust the pressure to oil seal seat to guarantee the effectiveness of sealing, considering that the condensate generated by the tail gas of fan has lubricating effect on the oil seal sealing surface, so it is not necessary to add lubricating medium, and the service life of oil seal can be prolonged. If the oil seal needs to be replaced due to wear and tear in the later period, in order to facilitate operation, only the new oil seal needs to be cut open and installed in the oil seal seat, and the fixed bolt can be compressed to quickly replace.

[0050] The oil seal seat fixed plate 5 of the utility model is fixed together with the fan volute by welding, in order to avoid tail gas leakage, the welding seam between the oil seal seat fixed plate 5 and the fan volute is full welding, and a welding layer is obtained. The original fan impeller shaft sleeve outer ring reinforcing plate, i.e. the oil seal seat fixed plate 5 of the utility model, is spot welded on the fan volute, and the tail gas is also easy to leak in the gap, so a full welding is also needed to be carried out on the gap by using a welding machine. Since the original fan motor is provided with a wind cooling wheel, and considering that the temperature of the conveyed tail gas is not very high, the original fan motor with the wind cooling wheel is cancelled, so as to leave enough space for the replacement of the skeleton oil seal 2 and the operation of adjusting the oil seal seat 1.

[0051] The main body shape of the oil seal seat 1 is a circular disc, the diameter of the inner ring 6 of the oil seal seat 1 is slightly larger than the outer diameter of the impeller shaft sleeve 3, and the difference between the diameter of the inner ring 6 of the oil seal seat 1 and the outer diameter of the impeller shaft sleeve 3 is between 1 mm and 3 mm.

[0052] Reference Figure 2 The oil seal seat 1 is provided with a ring groove 7, the ring groove 7 is used for clamping the skeleton oil seal 2, the inner ring 6 of the oil seal seat 1 is coaxially arranged with the ring groove 7, the outer diameter of the skeleton oil seal 2 is the same as the inner diameter of the ring groove 7, and the depth of the ring groove 7 ranges from one half of the thickness of the oil seal seat 1 to two thirds of the thickness of the oil seal seat 1.

[0053] The main body shape of the skeleton oil seal 2 is a ring body, the inner diameter of the skeleton oil seal 2 is consistent with the outer diameter of the impeller shaft sleeve 3, the inner wall of the skeleton oil seal 2 is outwardly provided with an extended sealing lip, and the outer side wall of the skeleton oil seal 2 has a skirt which is perpendicular to the ring body.

[0054] The thickness of the sealing lip gradually decreases from the inner wall of the skeleton oil seal 2 outwardly, excess condensate generated by the fan tail gas is shovelled to the ring body, and the excess condensate is prevented from overflowing from the oil seal sealing surface of the skeleton oil seal 2 and the impeller shaft sleeve 3, the skirt end of the utility model extends to the impeller shaft sleeve 3 and has a row of blocks which are perpendicular to the skirt, the contact area with the oil seal fixing plate 5 is increased, and the excess condensate is prevented from overflowing from the contact surface of the oil seal fixing plate 5 and the skeleton oil seal 2.

[0055] Reference Figure 2 The oil seal seat 1 is provided with a plurality of bolt holes 8, the oil seal fixing plate 5 is provided with a plurality of threaded holes at positions corresponding to the bolt holes 8, the fixing screw 4 is first threaded through the bolt hole 8 of the oil seal seat 1, and then is screwed with the threaded hole of the oil seal fixing plate 5. The position of the oil seal seat 1 and the compression force of the skeleton oil seal 2 are adjusted by adjusting the distance between the fixing screw 4 and the threaded hole.

[0056] The plurality of bolt holes 8 are axially symmetrical along the axis of the oil seal seat 1 and are evenly distributed on the oil seal seat 1.

Claims

1. A sealing device for an oil seal on a fan impeller shaft sleeve, characterized in that, The oil seal seat (1) and the oil seal seat fixing plate (5) are fixed by the fixing screw (4).

2. The fan impeller shaft oil seal assembly of claim 1, wherein, The oil seal seat fixing plate (5) and the fan volute are welded, and a welding layer is arranged at the welding seam.

3. The fan impeller shaft oil seal sealing device according to claim 1 or 2, characterized in that, The main body of the oil seal seat (1) is a circular disc, and the inner ring (6) of the oil seal seat (1) has a diameter that is 1-3 mm larger than the outer diameter of the impeller shaft sleeve (3).

4. The fan impeller shaft oil seal assembly of claim 3, wherein: The oil seal seat (1) is provided with a ring groove (7) for accommodating the skeleton oil seal (2), the ring groove (7) is coaxially arranged with the inner ring (6) of the oil seal seat (1), the inner diameter of the ring groove (7) is the same as the outer diameter of the skeleton oil seal (2), and the depth of the ring groove (7) is between one-half and two-thirds of the thickness of the oil seal seat (1).

5. The fan impeller shaft oil seal assembly of claim 3 wherein, The oil seal seat (1) is provided with a plurality of bolt holes (8), the oil seal seat fixing plate (5) is provided with a plurality of threaded holes corresponding to the positions of the bolt holes (8), and the fixing screw (4) is threadedly connected with the threaded holes of the oil seal seat fixing plate (5) through the bolt holes (8) of the oil seal seat (1).

6. A fan impeller shaft oil seal assembly as claimed in claim 5, wherein, The bolt holes (8) are uniformly distributed along the axis of the oil seal seat (1).

7. A fan impeller shaft oil seal assembly according to any one of claims 4 to 6, wherein the seal assembly further comprises a seal retainer. The main body of the skeleton oil seal (2) is a ring body, the inner diameter of the skeleton oil seal (2) is the same as the outer diameter of the impeller shaft sleeve (3), the inner wall of the skeleton oil seal (2) has a sealing lip outwardly, and the outer side of the skeleton oil seal (2) has a skirt.

8. The fan impeller shaft oil seal assembly of claim 7, wherein: The thickness of the sealing lip gradually decreases from inside to outside, and the end of the skirt extends a stopper towards the impeller shaft sleeve (3).

Images