Water-lubricated screw main engine bearing sealing drainage mechanism

Abstract

The utility model relates to the technical field of bearing sealing, and discloses a water-lubricated screw main machine bearing sealing drainage mechanism, which comprises a main shaft, a bearing body, a front bearing seat and a rear bearing seat, the main shaft is arranged at the inner edges of the front bearing seat and the rear bearing seat through the bearing body, a baffle plate assembly is arranged in the front bearing seat, and the baffle plate assembly is arranged in the rear bearing seat. A drainage channel is formed in the inner edge of the front bearing seat, a drainage hole extending to the outer edge of the drainage channel is formed in one end of the drainage channel, a front bearing cover plate is installed at one end of the front bearing seat through a sealing gasket, the baffle assembly comprises a baffle piece, and an annular channel is formed between the baffle piece and the drainage channel. According to the bearing sealing drainage mechanism for the water-lubricated screw main machine, the bearing seat is combined with the baffle assembly, gas-liquid mixtures can be separated conveniently, separated liquid is guided out through a lower face hole of the bearing seat, the bearing sealing drainage mechanism can be suitable for high-humidity working conditions such as a water-lubricated screw machine, emulsification of lubricating oil can be reduced, and the service life of the water-lubricated screw main machine is prolonged. Therefore, the service life of the bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing sealing technical field, concretely is a kind of water lubrication screw host bearing sealing drainage mechanism. BACKGROUND

[0002] Oil injection screw compressor can make discharge gas contain oil, even if after complex post-processing purification, still contain a small amount of lubricating oil, cannot satisfy absolute oil-free demand, and water lubrication screw avoids that compressed air is contaminated by oil from source, can provide pure oil-free compressed air, in the compression process, water vapor in air can condense into liquid water, if these moisture accumulates in equipment, can contact with metal parts, electrochemical corrosion occurs, lead to equipment rust, corrosion, reduce equipment strength and service life, so drainage mechanism is often used, can make it quickly discharge these condensed water, avoid equipment from corrosion.

[0003] In the prior art, the separated liquid of gas-liquid mixture is not convenient to discharge, which can cause the liquid to accumulate inside the bearing seat, resulting in corrosion of the bearing seat due to long-term immersion, affecting the subsequent normal use, and not timely discharge can cause the lubricating oil to emulsify, resulting in a high risk of water entering the bearing. SUMMARY

[0004] The utility model provides a kind of water lubrication screw host bearing sealing drainage mechanism, it can effectively solve the separated liquid of gas-liquid mixture in prior art is not convenient to discharge, which can cause the liquid to accumulate inside the bearing seat, resulting in corrosion of the bearing seat due to long-term immersion, affecting the subsequent normal use, and not timely discharge can cause the lubricating oil to emulsify, resulting in a high risk of water entering the bearing.

[0005] The utility model employs the technical scheme that a kind of water lubrication screw host bearing sealing drainage mechanism, including main shaft, bearing body, front bearing seat and rear bearing seat, the main shaft is installed in front bearing seat and rear bearing seat along place by bearing body, front bearing seat is provided with baffle assembly, drainage channel is set in front bearing seat along place, the drainage hole that extends to outer along place is set in one end of drainage channel, front bearing seat one end is installed front bearing cover plate by sealing pad;

[0006] The baffle assembly includes a baffle piece, and an annular channel is formed between the baffle piece and the drainage channel.

[0007] Preferably, the main shaft is provided with a rear bearing seat near one end of the baffle assembly, a protrusion is fixedly installed on one end of the baffle assembly near the rear bearing seat, a limiting slot is formed on one end of the baffle assembly near the rear bearing seat, and the main shaft and the rear bearing seat are connected by the limiting slot and the protrusion.

[0008] Through the technical scheme, the plug-in structure of the protrusion and the limiting groove realizes quick positioning and fixing of the baffle assembly and the rear bearing seat, ensures coaxiality of the labyrinth ring-shaped channel, and avoids gas-liquid separation efficiency reduction caused by installation deviation.

[0009] Preferably, the inner ring surface of the baffle piece is provided with a clamping groove one, the clamping groove one is embedded with a sealing ring two, and the sealing ring two is in clearance fit with the outer surface of the main shaft.

[0010] Through the technical scheme, the sealing ring two fills the gap between the baffle piece and the main shaft, forms a sealing barrier, blocks liquid water from directly entering the bearing cavity through the gap, at the same time, clearance fit avoids direct friction between the sealing ring two and the main shaft, reduces the risk of wear and tear, and prolongs the service life of the seal.

[0011] Preferably, the drainage channel is an inclined flow guide groove, and the inlet end of the drainage channel is higher than the outlet end.

[0012] Through the technical scheme, the inclined design utilizes gravity to accelerate liquid flow, avoids liquid retention in the drainage channel, and the structure that the inlet end is higher than the outlet end ensures that the separated liquid can be completely drained out, prevents liquid accumulation from corroding the bearing seat, and avoids gas backflow from affecting the separation effect.

[0013] Preferably, the front bearing cover plate is positioned and connected with the front bearing seat through a first pin, the front bearing seat is provided with a second pin at one end, and the second pin fixes the baffle assembly.

[0014] Through the technical scheme, the first pin ensures that the sealing gaskets of the front bearing cover plate and the front bearing seat are uniformly pressed, improves the sealing reliability, the second pin directly fixes the baffle assembly, avoids the baffle from loosening under the impact of gas-liquid, ensures stability of the labyrinth channel structure, and facilitates quick unlocking during disassembly.

[0015] Preferably, the outer ring surface of the baffle piece is provided with a clamping groove two, and the clamping groove two communicates with the drainage channel and the drainage hole.

[0016] Through the technical scheme, when the baffle piece is installed to the front bearing seat, the clamping groove two is aligned with the inlet of the drainage channel, ensures that the separated liquid directly flows into the drainage channel through the clamping groove two, and the liquid is gathered to the drainage hole through the drainage channel for drainage, which can avoid accumulation in the gap between the baffle piece and the bearing seat, and improve the drainage efficiency.

[0017] Preferably, the drainage hole is arranged at the lowest point of the bottom of the front bearing seat, a sealing ring one is arranged between the front bearing cover plate and the main shaft, and the end of the baffle assembly away from the main shaft is provided with a connecting end.

[0018] Through the double sealing formed by the sealing ring one and the sealing ring two, external gas and internal liquid are blocked respectively, and the sealing property of the bearing cavity is improved.

[0019] Compared with the prior art, the water lubrication screw host bearing sealing drainage mechanism has the following beneficial effects:

[0020] 1、The water lubrication screw host bearing sealing drainage mechanism, through the combination of the bearing seat and the baffle assembly, can conveniently separate gas-liquid mixture, and the separated liquid is guided out to the outside through the hole under the bearing seat, which can be applicable to high humidity working conditions, such as water lubrication screw machines, can reduce lubricating oil emulsification, and the risk of bearing water entry, thereby prolonging the service life thereof;

[0021] 2、The water lubrication screw host bearing sealing drainage mechanism forms double sealing through the sealing ring one and the sealing ring two, respectively blocks external gas and internal liquid, improves the sealing property of the bearing cavity, the first pin ensures that the sealing gaskets of the front bearing cover plate and the front bearing seat are uniformly pressed, improves the sealing reliability, and the second pin directly fixes the baffle assembly, avoids loosening of the baffle under the gas-liquid impact, and improves the stability of the sealing channel. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a sectional structure schematic view of the utility model;

[0023] Figure 2 It is a main shaft and front bearing cover plate installation structure schematic view of the utility model;

[0024] Figure 3 It is a baffle assembly three-dimensional structure schematic view of the utility model;

[0025] Figure 4 It is a baffle assembly split structure schematic view of the utility model;

[0026] Figure 5 It is a baffle assembly sectional structure schematic view of the utility model.

[0027] Wherein: 1, main shaft;2, bearing body;3, front bearing seat;4, drainage channel;5, drainage hole;6, front bearing cover plate;7, sealing gasket;8, first pin;9, baffle assembly;901, baffle piece;902, limit groove;903, sealing ring one;904, clamping groove one;905, sealing ring two;906, clamping groove two;907, protruding block;10, connecting end;11, second pin;12, rear bearing seat. DETAILED DESCRIPTION

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: As Figures 1-5 As shown, the present invention provides a water-lubricated screw main machine bearing sealing and drainage mechanism, including a main shaft 1, a bearing body 2, a front bearing seat 3 and a rear bearing seat 12. The main shaft 1 is installed on the inner edge of the front bearing seat 3 and the rear bearing seat 12 through the bearing body 2. A baffle assembly 9 is provided in the front bearing seat 3. A drainage channel 4 is provided on the inner edge of the front bearing seat 3. A drainage hole 5 extending to the outer edge is provided at one end of the drainage channel 4. A front bearing cover plate 6 is installed on one end of the front bearing seat 3 through a sealing gasket 7.

[0030] The baffle assembly 9 includes a baffle member 901, which forms an annular channel with the drainage channel 4.

[0031] Specifically, a rear bearing seat 12 is provided at one end of the main shaft 1 near the baffle assembly 9. A protrusion 907 is fixedly installed at one end of the baffle assembly 9 near the rear bearing seat 12. A limiting groove 902 is opened at one end of the baffle assembly 9 near the rear bearing seat 12. The main shaft 1 and the rear bearing seat 12 are connected by the limiting groove 902 and the protrusion 907. The advantage is that the plug-in structure of the protrusion 907 and the limiting groove 902 realizes the quick positioning and fixing of the baffle assembly 9 and the rear bearing seat 12, ensuring the coaxiality of the labyrinth annular channel and avoiding the decrease in gas-liquid separation efficiency due to installation deviation.

[0032] Specifically, the inner ring surface of the baffle 901 is provided with a groove 904, and a sealing ring 905 is embedded in the groove 904. The sealing ring 905 is in clearance fit with the outer surface of the spindle 1. The advantage is that the sealing ring 905 fills the gap between the baffle 901 and the spindle 1, forming a sealing barrier to prevent liquid water from directly entering the bearing cavity through the gap. At the same time, the clearance fit avoids direct friction between the sealing ring 905 and the spindle 1, reducing the risk of wear and extending the sealing life.

[0033] Specifically, the drainage channel 4 is an inclined guide channel with the inlet end of the drainage channel 4 being higher than the outlet end. The advantage is that the inclined design uses gravity to accelerate the flow of liquid and avoids the liquid from stagnating in the drainage channel 4. The structure with the inlet end higher than the outlet end ensures that the separated liquid can be completely discharged, preventing the accumulated liquid from corroding the bearing seat 3, and at the same time preventing gas backflow from affecting the separation effect.

[0034] Example 2: Figures 2-5 As shown, this is an improvement on the previous embodiment.

[0035] Specifically, the front bearing cover plate 6 is positioned and connected with the front bearing seat 3 through the first pin 8, the front bearing seat 3 is provided with the second pin 11 at one end, and the second pin 11 fixes the baffle assembly 9, and the first pin 8 ensures that the front bearing cover plate 6 and the sealing gasket 7 of the front bearing seat 3 are uniformly pressed, the sealing reliability is improved, the second pin 11 directly fixes the baffle assembly 9, the baffle is prevented from loosening under the impact of gas and liquid, the stability of the labyrinth passage structure is ensured, and the baffle assembly 9 is quickly unlocked during disassembly.

[0036] Specifically, the outer ring surface of the baffle piece 901 is provided with a clamping groove two 906, and the clamping groove two 906 is communicated with the drainage channel 4 and the drainage hole 5, and the clamping groove two 906 is aligned with the inlet of the drainage channel 4 when the baffle piece 901 is installed to the front bearing seat 3, so that the separated liquid directly flows into the drainage channel 4 through the clamping groove two 906, and the liquid is gathered to the drainage hole 5 for drainage through the drainage channel 4, and accumulation in the gap between the baffle piece 901 and the bearing seat 3 is avoided, and the drainage efficiency is improved.

[0037] Specifically, the drainage hole 5 is arranged at the lowest point of the bottom of the front bearing seat 3, the sealing ring one 903 is arranged between the front bearing cover plate 6 and the main shaft 1, and the end, away from the main shaft 1, of the baffle assembly 9 is provided with the connecting end 10, and the double sealing is formed by the sealing ring one 903 and the sealing ring two 905, and the external gas and the internal liquid are blocked respectively, and the sealing property of the bearing cavity is improved.

[0038] Working principle: in use, the plug-in structure of the convex block 907 and the limiting groove 902 realizes the quick positioning and fixing of the baffle assembly 9 and the rear bearing seat 12, ensures the coaxiality of the labyrinth ring channel, avoids the decrease of the gas-liquid separation efficiency caused by the installation deviation, the sealing ring two 905 fills the gap between the baffle piece 901 and the main shaft 1, forms a sealing barrier, blocks the liquid water from directly entering the bearing cavity through the gap, and at the same time, the gap cooperation avoids the contact between the sealing ring two 905 and the main shaft 1

[0039] Direct friction, reduce the risk of wear and tear, prolong the life of the seal, tilt design uses gravity to accelerate liquid flow, avoid liquid retention in the drain passage 4, the structure of the inlet end higher than the outlet end ensures that the separated liquid can be completely discharged, prevents liquid corrosion bearing seat 3, while avoiding gas backflow affecting the separation effect, the first pin 8 ensures that the front bearing cover plate 6 and the sealing gasket 7 of the front bearing seat 3 are uniformly pressed, improves the sealing reliability, the second pin 11 directly fixes the baffle assembly 9, avoids the baffle loosening under the impact of gas and liquid, ensures the stability of the labyrinth passage structure, and facilitates quick unlocking during disassembly, when the baffle piece 901 is installed to the front bearing seat 3, the clamping groove two 906 is aligned with the drain passage 4 inlet, ensures that the separated liquid flows into the drain passage 4 through the clamping groove two 906, and the liquid is gathered to the drain hole 5 through the drain passage 4 and discharged, which can avoid accumulation in the gap between the baffle piece 901 and the bearing seat 3, and improves the drainage efficiency, the double sealing is formed by the sealing ring one 903 and the sealing ring two 905, which blocks the external gas and the internal liquid respectively, and improves the sealing performance of the bearing cavity.

[0040] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A water lubricated screw main shaft bearing sealing drainage mechanism, comprising a main shaft (1), a bearing body (2), a front bearing seat (3) and a rear bearing seat (12), the main shaft (1) is installed in the front bearing seat (3) and the rear bearing seat (12) along the shaft by the bearing body (2), characterized in that: The front bearing seat (3) is provided with a baffle assembly (9), a drainage channel (4) is formed in the front bearing seat (3), one end of the drainage channel (4) is provided with a drainage hole (5) extending to the outer edge, and the front bearing seat (3) is provided with a front bearing cover plate (6) at one end through a sealing gasket (7). The baffle assembly (9) comprises a baffle piece (901), and an annular channel is formed between the baffle piece (901) and the drainage channel (4).

2. A water-lubricated stern tube bearing seal drainage mechanism according to claim 1, characterized in that: The main shaft (1) is provided with a rear bearing seat (12) at one end close to the baffle assembly (9), the baffle assembly (9) is fixedly provided with a protrusion (907) at one end close to the rear bearing seat (12), the baffle assembly (9) is provided with a limiting groove (902) at one end close to the rear bearing seat (12), and the main shaft (1) and the rear bearing seat (12) are connected through the limiting groove (902) and the protrusion (907).

3. A water-lubricated stern tube bearing seal drainage mechanism according to claim 1, characterized in that: An inner annular surface of the baffle piece (901) is provided with a clamping groove (904), a sealing ring (905) is embedded in the clamping groove (904), and the sealing ring (905) is in clearance fit with the outer surface of the main shaft (1).

4. A water-lubricated stern tube bearing seal drainage mechanism according to claim 1, characterized in that: The drainage channel (4) is an inclined flow guide groove, and the inlet end of the drainage channel (4) is higher than the outlet end.

5. A water-lubricated stern tube bearing seal drainage mechanism according to claim 1, characterized in that: The front bearing cover plate (6) is positioned and connected with the front bearing seat (3) through a first pin (8), the front bearing seat (3) is provided with a second pin (11) penetrating one end, and the second pin (11) fixes the baffle assembly (9).

6. A water-lubricated stern tube bearing seal drainage mechanism according to claim 1, characterized in that: An outer annular surface of the baffle piece (901) is provided with a clamping groove (906), and the clamping groove (906) is in communication with the drainage channel (4) and the drainage hole (5).

7. A water-lubricated bearing seal drainage mechanism for a marine propeller shaft as defined in claim 1 wherein: The drainage hole (5) is arranged at the lowest point of the bottom of the front bearing seat (3), a sealing ring (903) is arranged between the front bearing cover plate (6) and the main shaft (1), and the baffle assembly (9) is provided with a connecting end (10) away from the main shaft (1). The drainage hole (5) is arranged at the lowest point of the bottom of the front bearing seat (3), a sealing ring (903) is arranged between the front bearing cover plate (6) and the main shaft (1), and the baffle assembly (9) is provided with a connecting end (10) away from the main shaft (1).

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