CN211116584U

CN211116584U - Roots blower for special gas

Info

Publication number: CN211116584U
Application number: CN201922198420.6U
Authority: CN
Inventors: 沈杰
Original assignee: Yixing Fuxi Machinery Co ltd
Current assignee: Yixing Fuxi Machinery Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-07-28
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a roots fan for special gas relates to roots fan field, including the fan main part, the inside of fan main part is provided with the transmission shaft, and the outside of transmission shaft is connected with the impeller, the one end of transmission shaft is connected with the gear, and the outside of gear is connected with the gear box, one side of transmission shaft is connected with the driven shaft, the one end of transmission shaft and driven shaft all is connected with the primary shaft, and the other end of transmission shaft and driven shaft all is connected with the secondary bearing, one side of primary shaft is connected with tooth side single mechanical seal. The utility model discloses a single mechanical seal of first bearing, second bearing, tooth side, drive side single mechanical seal that set up has realized having set up high life's single mechanical seal at the bearing surface, and the lubricating oil cooling lubrication from the area in the single mechanical seal use oil tank of special design, and it has used special alloy material, and holistic life extension can guarantee completely that gear oil can not reveal to fan gas phase end.

Description

Roots blower for special gas

Technical Field

The utility model relates to a roots's fan field specifically is a roots's fan for special gas.

Background

The Roots blower is a positive displacement blower, the end face of the impeller, front and back end covers of the blower, the principle is to utilize two blade-shaped rotors to make relative motion in the cylinder to compress and transport the rotary compressor of the gas, this blower is simple in construction, it is convenient to make, apply to oxygenation of aquaculture, sewage treatment aeration, cement transport extensively, is more suitable for the gas transport and pressurization system of the low pressure occasion, can also be used as the vacuum pump, etc..

The existing Roots blower adopts labyrinth seal and filler combined seal, and the labyrinth seal directly causes partial leakage of gas in a blower cavity; the packing combined seal has trace leakage, and long-time use can be worn and torn, and the later stage of revealing can be increaseed, and some ordinary roots fans have also adopted single mechanical seal, has only done the isolation of oil gas, and when sealing the damage, special gas can directly get into the cavity that oil tank or partial lubricating oil got into the fan.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the sealing effect of the existing Roots blower is poor, the Roots blower for special gas is provided.

In order to achieve the above object, the utility model provides a following technical scheme: a Roots blower for special gas comprises a blower main body, wherein a transmission shaft is arranged inside the blower main body, an impeller is connected to the outer side of the transmission shaft, a gear is connected to one end of the transmission shaft, a gear box is connected to the outer side of the gear, a driven shaft is connected to one side of the transmission shaft, first bearings are connected to one ends of the transmission shaft and the driven shaft, second bearings are connected to the other ends of the transmission shaft and the driven shaft, a tooth-side single mechanical seal is connected to one side of the first bearings, a polytetrafluoroethylene seal is connected to one side of the tooth-side single mechanical seal, a transmission-side single mechanical seal is connected to one side of the second bearings, a transmission side cover is connected to one side of the blower main body, a bearing gland is connected to the inner side of the transmission side cover, a driven side cover is connected to one side of the blower, and one side that the inside bottom of fan main part is located the second bearing is connected with the bearing oil tank, the outside of bearing oil tank is connected with the chock plug, and the top of bearing oil tank is connected with the oil tank and ventilates the lid, the one end of second bearing is connected with the nut for the bearing, and one side of the nut for the bearing is connected with the nut packing ring for the bearing, the inside of gear box is provided with the gear oil tank gasket.

Preferably, the number of the gears is two, wherein one side of one gear is connected with a driven shaft, and the outer side of the driven shaft is connected with an impeller.

Preferably, one side of the gear is connected with a shaft sleeve for the gear, one side of the shaft sleeve for the gear is connected with a nut washer for the gear, one side of the nut washer for the gear is connected with a nut for the gear, and one side of the plug head is connected with an oil mirror.

Preferably, one side of drive side single mechanical seal is connected with the tetrafluoro seal, the outside of transmission shaft is connected with the TC oil blanket, and the inside of transmission shaft is provided with the single-end circular key.

Preferably, a shaft sleeve is connected to one side of the second bearing, which is positioned on the outer side of the transmission shaft.

Preferably, an oil tank vent cover is connected to the top end of the gear box, and an oil pumping disc is connected to one end of the driven shaft.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a first bearing, second bearing, tooth side single mechanical seal, transmission side single mechanical seal that set up have realized setting up the single mechanical seal of long-life at the bearing surface, and the single mechanical seal of special design uses the lubricating oil cooling lubrication of taking certainly in the oil tank, and it has used special alloy material, and holistic life extension can guarantee completely that gear oil can not reveal to fan gas phase end;

2. the utility model realizes better sealing effect at the cavity end by arranging the PTFE seal through the arranged PTFE seal, and the PTFE seal has the advantages of corrosion resistance cavity, long wear-resisting service life and sealing the gas of the cavity;

3. the utility model discloses a set up return line, realized when high pressure output, the sealed trace that can produce of tetrafluoro is revealed, utilizes the entrance of the gaseous recovery fan that return line design revealed the trace, has guaranteed that gaseous not leak outward.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a top cross-sectional view of the present invention.

In the figure: 1. a fan main body; 2. an impeller; 3. a drive shaft; 4. a driven shaft; 5. a drive side cover; 6. a passive side cover; 7. a first bearing; 8. a second bearing; 9. mechanical sealing of the tooth side single machine; 10. the transmission side is mechanically sealed; 11. sealing with tetrafluoro; 12. a bearing gland; 13. TC oil seal; 14. a gear; 15. a nut washer for the gear; 16. a nut for a gear; 17. a shaft sleeve for a gear; 18. a gear case; 19. a shaft sleeve; 20. a return line; 21. a single-ended round key; 22. a plug head; 23. an oil mirror; 24. a vent cover of the oil tank; 25. a bearing oil tank; 26. a gear oil tank gasket; 27. an oil pumping disc; 28. a nut for a bearing; 29. a nut washer for a bearing; 30. bearing oil tank gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a roots blower for special gas includes a blower main body 1, a transmission shaft 3 is disposed inside the blower main body 1, an impeller 2 is connected to an outer side of the transmission shaft 3, a gear 14 is connected to one end of the transmission shaft 3, a gear box 18 is connected to an outer side of the gear 14, a driven shaft 4 is connected to one side of the transmission shaft 3, a first bearing 7 is connected to one end of each of the transmission shaft 3 and the driven shaft 4, a second bearing 8 is connected to the other end of each of the transmission shaft 3 and the driven shaft 4, a gear-side single mechanical seal 9 is connected to one side of the first bearing 7, a teflon seal 11 is connected to one side of the gear-side single mechanical seal 9, a transmission-side single mechanical seal 10 is connected to one side of the second bearing 8, a transmission-side cover 5 is connected to one side of the blower main body 1, a bearing gland 12 is connected to an, the inside top of fan main part 1 is provided with return line 20, and one side that the inside bottom of fan main part 1 is located second bearing 8 is connected with bearing oil tank 25, and the outside of bearing oil tank 25 is connected with chock plug 22, and the top of bearing oil tank 25 is connected with oil tank vent cap 24, and the one end of second bearing 8 is connected with nut 28 for the bearing, and one side of nut 28 for the bearing is connected with nut packing ring 29 for the bearing, and the inside of gear box 18 is provided with gear oil tank gasket 26.

The utility model discloses a single mechanical seal of primary shaft bearing 7, secondary shaft bearing 8, tooth side single mechanical seal 9, transmission side single mechanical seal 10 that set up have realized having set up high life's single mechanical seal at the bearing surface, and the lubricating oil cooling lubrication from the area in the single mechanical seal of special design uses the oil tank, and it has used special alloy material, holistic life extension can guarantee completely that gear oil can not reveal to fan-driven gas phase end.

Please refer to fig. 2 and fig. 3, the number of the gears 14 is two, wherein one side of one gear 14 is connected to the driven shaft 4, the outer side of the driven shaft 4 is connected to the impellers 2, the number of the impellers 2 is two, and the two impellers 2 are three-bladed impellers.

Referring to fig. 1 and 3, one side of the gear 14 is connected to a gear bushing 17, one side of the gear bushing 17 is connected to a gear nut washer 15, one side of the gear nut washer 15 is connected to a gear nut 16, one side of the plug 22 is connected to an oil mirror 23, and the gear bushing 17, the gear nut washer 15 and the gear nut 16 are all used for ensuring that the gear 14 can normally operate.

Referring to fig. 1 and 3, one side of the single mechanical seal 10 on the transmission side is connected with a tetrafluoro seal 11, the outer side of the transmission shaft 3 is connected with a TC oil seal 13, and a single-end round key 21 is arranged inside the transmission shaft 3, so that different materials, such as slightly corrosive gas, can be adopted at the flow passage part of the fan according to different gas properties: the overflowing part of the fan adopts a stainless steel coating; slightly corrosive gases contain particulate matter: the over-current part of the fan adopts a titanium tungsten coating; medium (heavy) etching gas: the overflowing part of the fan is made of a stainless steel material; explosive gas: the exterior of the dynamic impeller of the fan adopts a special rubber material coating.

Please refer to fig. 3, one side of the second bearing 8 is located outside the transmission shaft 3 and is connected with a shaft sleeve 19, and the shaft sleeve 19 can ensure the normal operation process of the bearing and the integrity of the device.

Referring to fig. 3, the top end of the gear box 18 is connected to a tank vent cover 24, one end of the driven shaft 4 is connected to an oil pumping disc 27, and the tank vent cover 24 is movably connected to the gear box 18.

The working principle is as follows: when in use, the device is required to be connected with a motor and an external power supply, the external power supply provides electric energy for the device to ensure that the device can normally operate, an output shaft of the motor is connected with a transmission shaft 3, the transmission shaft 3 drives one group of impellers 2 to rotate in the rotating process, a gear 14 at one end of the transmission shaft 3 drives the other group of gears 14 meshed with the transmission shaft to rotate, the other group of gears 14 can drive a driven shaft 4 to rotate, the driven shaft 4 drives the impellers 2 at the outer side of the driven shaft to rotate in the rotating process, the two groups of impellers 2 and the two impellers rotate in opposite directions, and because the clearances among the impellers, the impellers and a casing, and the impellers and a wallboard are extremely small, the air inlet forms a vacuum state, air enters an air inlet cavity under the action of atmospheric pressure, then, two blades of each impeller, the wallboard and the casing form a sealed cavity, and the air in the air, the exhaust chamber is constantly brought to by the sealed chamber that two blades formed, again because the impeller in the exhaust chamber is intermeshing, thereby extrude the air between two blades, operation that does not stop like this, the air is constantly from the air inlet and is carried the gas outlet, and when needs lubricate the bearing, then need add lubricating oil to the bearing, first bearing 7 and second bearing 8 have all set up the single mechanical seal of high life, the single mechanical seal uses the lubricating oil cooling lubrication from taking in the bearing oil tank 25, can guarantee completely that lubricating oil can not reveal to wind-driven machine gas phase end, and the tetrafluoro seal 11 that sets up, realized at the cavity end, better sealed effect has been reached, the anticorrosive chamber of tetrafluoro seal, long wear-resisting life, gas to the cavity has been sealed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a roots's fan for special gas, includes fan main part (1), its characterized in that: the fan is characterized in that a transmission shaft (3) is arranged inside the fan main body (1), an impeller (2) is connected to the outer side of the transmission shaft (3), a gear (14) is connected to one end of the transmission shaft (3), a gear box (18) is connected to the outer side of the gear (14), a driven shaft (4) is connected to one side of the transmission shaft (3), a first bearing (7) is connected to one end of each of the transmission shaft (3) and the driven shaft (4), a second bearing (8) is connected to the other end of each of the transmission shaft (3) and the driven shaft (4), a gear side single mechanical seal (9) is connected to one side of the first bearing (7), a tetrafluoro seal (11) is connected to one side of the gear side single mechanical seal (9), a transmission side single mechanical seal (10) is connected to one side of the second bearing (8), and a transmission side cover (5), and the inboard of transmission side cap (5) is connected with bearing gland (12), one side that transmission side cap (5) were kept away from in fan main part (1) is connected with passive side cap (6), the inside top of fan main part (1) is provided with return line (20), and one side that the inside bottom of fan main part (1) is located second bearing (8) is connected with bearing oil tank (25), the outside of bearing oil tank (25) is connected with chock plug (22), and the top of bearing oil tank (25) is connected with oil tank vent cap (24), the one end of second bearing (8) is connected with nut (28) for the bearing, and one side of nut (28) for the bearing is connected with nut packing ring (29) for the bearing, the inside of gear box (18) is provided with gear oil tank packing piece (26).

2. A roots blower for a special gas as set forth in claim 1, wherein: the number of the gears (14) is two, one side of one group of the gears (14) is connected with a driven shaft (4), and the outer side of the driven shaft (4) is connected with an impeller (2).

3. A roots blower for a special gas as set forth in claim 1, wherein: one side of gear (14) is connected with axle sleeve (17) for the gear, and one side of axle sleeve (17) for the gear is connected with nut packing ring (15) for the gear, one side of nut packing ring (15) for the gear is connected with nut (16) for the gear, one side of chock plug (22) is connected with oil mirror (23).

4. A roots blower for a special gas as set forth in claim 1, wherein: one side of transmission side single mechanical seal (10) is connected with tetrafluoro seal (11), the outside of transmission shaft (3) is connected with TC oil blanket (13), and the inside of transmission shaft (3) is provided with single-end circular key (21).

5. A roots blower for a special gas as set forth in claim 1, wherein: one side of the second bearing (8) is positioned at the outer side of the transmission shaft (3) and is connected with a shaft sleeve (19).

6. A roots blower for a special gas as set forth in claim 1, wherein: an oil tank vent cover (24) is connected to the top end of the gear box (18), and an oil pumping disc (27) is connected to one end of the driven shaft (4).