CN201858150U

CN201858150U - Overlapping seal type Roots fan

Info

Publication number: CN201858150U
Application number: CN201020619580XU
Authority: CN
Inventors: 仇学莲; 韩春玉; 牛玉升; 杨德波; 管凯
Original assignee: SHANDONG ZHANGHUANG MACHINERY INDUSTRIAL Co Ltd
Current assignee: SHANDONG ZHANGHUANG MACHINERY INDUSTRIAL Co Ltd
Priority date: 2010-11-23
Filing date: 2010-11-23
Publication date: 2011-06-08
Anticipated expiration: 2020-11-23

Abstract

The utility model provides an overlapping seal type Roots fan comprising a fan body, wherein the right side of a compression cavity body of the fan body is respectively provided with a supporting lateral plate and an auxiliary oil tank; the right parts of a main shaft and an auxiliary shaft of the fan body are respectively arranged in the supporting lateral plate and the auxiliary oil tank, and are also respectively located on a main bearing and an auxiliary bearing of the supporting lateral plate; a main sealing sleeve and an auxiliary sealing sleeve which are in close fit with the supporting lateral plate are respectively arranged in the supporting lateral plate; a main shaft sleeve in close fit with the main shaft is arranged on the main shaft, and an auxiliary shaft sleeve in close fit with the auxiliary shaft is arranged on the auxiliary shaft; the main shaft sleeve is arranged in the main sealing sleeve and is in rotary matching with the main sealing sleeve, and the auxiliary shaft sleeve is arranged in the auxiliary sealing sleeve and is in rotary matching with the auxiliary sealing sleeve; the main shaft sleeve and the auxiliary shaft sleeve are respectively provided with at least one ring groove; and expansion rings are respectively arranged in the ring grooves and are respectively in contact with the main sealing sleeve and the auxiliary sealing sleeve. The overlapping seal type Roots fan can solve the problem in the prior art that the leakage of compressed air and lubricating oil can be easily caused due to unreasonable sealing structure.

Description

Lap seal formula roots blower

Technical field

The utility model relates to the industrial fan technical field, specifically a kind of lap seal formula roots blower.

Background technique

The roots blower of industrial extensive use, between its compression chamber and the drop tank support side plate is installed, the right part of its main shaft and auxilliary axle is installed in respectively on the bearing of support side plate, and be provided with in the drop tank, offer pollutant exhaust hole on the bottom of support side plate, make the lubricant oil in the drop tank if when the matching gap of main shaft and auxilliary axle is leaked, can discharge respectively, badly influence the quality of air feed to prevent it from entering in the compression chamber from pollutant exhaust hole.For preventing the leakage of lubricant oil, the tradition roots blower generally adopts the mode of on main shaft and auxilliary axle oil sealing being installed respectively, but, because due to the Manufacturing material of oil sealing, its existence is subjected to external factor to influence fatal shortcoming big, that working life is short, palpus is often changed, therefore, a lot of troubles have been brought to Maintenance and Repair work.

Moreover, roots blower is when operation, owing to be in high pressure conditions after the air in its compression chamber is compressed, then be in atmospheric pressure state owing to be provided with pollutant exhaust hole in it on the support side plate, and traditional roots blower generally adopts is the labyrinth seal form, that is: main shaft and auxilliary axle respectively with support side plate between the seal form that matches, so the pressurized air in the compression chamber is easy to leak by the matching gap of this labyrinth seal.Thus, it can't guarantee the normal operating pressure in the compression chamber, has had a strong impact on the working efficiency and the air feed quality of roots blower.

The utility model content

The purpose of this utility model provides a kind of lap seal formula roots blower, and it is unreasonable and cause the problem of pressurized air and oil leak easily that it can solve sealing configuration that prior art exists.

The purpose of this utility model is achieved through the following technical solutions: lap seal formula roots blower, it comprises the body of roots blower, the compression chamber right side of body is respectively equipped with support side plate and drop tank, the main shaft of body and auxilliary axle right part are separately positioned in support side plate and the drop tank, and be installed in respectively on the main bearing and auxilliary bearing of support side plate, be separately installed with primary seal cover close-fitting in the support side plate and assist stuffing box gland with it, collar bush close-fitting with it is installed on main shaft, on the auxilliary axle close-fitting auxilliary axle sleeve with it is installed, collar bush is arranged on to rotate in the primary seal cover and with it and cooperates, auxilliary axle sleeve is arranged on to rotate in the auxilliary stuffing box gland and with it and cooperates, offer at least one annular groove respectively on collar bush and the auxilliary axle sleeve, piston ring is set respectively in the annular groove, and piston ring contacts with primary seal cover and auxilliary stuffing box gland respectively.

For further realizing the purpose of this utility model, also can finish by the following technical programs: described annular groove is respectively first groove, second groove, the 3rd groove, the 4th groove, the 5th groove and the 6th groove, first groove and second groove are opened in respectively on the left part position of collar bush, and the 3rd groove is opened on the middle right part position of collar bush; The 4th groove and the 5th groove are opened in respectively on the left part position of auxilliary axle sleeve, and the 6th groove is opened on the middle right part position of auxilliary axle sleeve; Described piston ring is respectively first piston ring, second piston ring, the 3rd piston ring, the 4th piston ring, the 5th piston ring and the 6th piston ring, first piston ring, second piston ring and the 3rd piston ring are installed in respectively in first groove, second groove and the 3rd groove, the 4th piston ring, the 5th piston ring and the 6th piston ring are installed in respectively in the 4th groove, the 5th groove and the 6th groove, first piston ring, second piston ring and the 3rd piston ring contact with the primary seal cover respectively, and the 4th piston ring, the 5th piston ring and the 6th piston ring contact with auxilliary stuffing box gland respectively.

The beneficial effect that the utility model can produce: because of being separately installed with primary seal cover close-fitting in the support side plate and assisting stuffing box gland with it, collar bush close-fitting with it is installed on main shaft, on the auxilliary axle close-fitting auxilliary axle sleeve with it is installed, collar bush is arranged on to rotate in the primary seal cover and with it and cooperates, auxilliary axle sleeve is arranged on to rotate in the auxilliary stuffing box gland and with it and cooperates, offer at least one annular groove respectively on collar bush and the auxilliary axle sleeve, piston ring is set respectively in the annular groove, piston ring contacts with primary seal cover and auxilliary stuffing box gland respectively, so, it can either prevent effectively that the interior pressurized air of compression chamber is to the support side plate internal leakage, can effectively prevent lubricant oil again respectively along main shaft and the internal leakage of auxilliary axial compression cavity, so fundamentally guaranteed the working efficiency and the air feed quality of roots blower.

Cause first groove and second groove are opened in respectively on the left part position of collar bush, first piston ring, second piston ring are installed in respectively in first groove and second groove, and, the 4th groove and the 5th groove are opened in respectively on the left part position of auxilliary axle sleeve, the 4th piston ring, the 5th piston ring are installed in respectively in the 4th groove and the 5th groove, so it has formed the lap seal form respectively on collar bush and auxilliary axle sleeve, it can guarantee further that the pressurized air in the compression chamber is not revealed.

Because of the 3rd groove is opened on the middle right part position of collar bush, the 3rd piston ring is installed in the 3rd groove, and, the 6th groove is opened on the middle right part position of auxilliary axle sleeve, the 6th piston ring is installed in the 6th groove, so it has formed oil seal respectively on collar bush and auxilliary axle sleeve, it can guarantee that the lubricant oil in the drop tank is not leaked.

The utlity model has and to prevent effectively that pressurized air from leaking, can effectively prevent again the remarkable advantage of oil leak, and having the evident characteristic that the external factor of not being subjected to influences, working life is long, need not often change, extensive use can produce good social, economic benefit.

Description of drawings

Fig. 1 is a plan structure schematic representation of the present utility model;

Fig. 2 is the partial enlarged drawing I among Fig. 1, the primary seal cover 11 and the auxilliary stuffing box gland 11a that install respectively in the main signal support side plate 2, collar bush 12 is installed on the main shaft 4, auxilliary axle sleeve 12a is installed on the auxilliary axle 5, the form that primary seal cover 11 and auxilliary stuffing box gland 11a match with collar bush 12 and auxilliary axle sleeve 12a respectively, and offer annular groove respectively on signal collar bush 12 and the auxilliary axle sleeve 12a, the structural type of piston ring is set respectively in the annular groove.

Embodiment

Lap seal formula roots blower of the present utility model, it comprises the body of roots blower, compression chamber 1 right side of body is respectively equipped with support side plate 2 and drop tank 3, the main shaft 4 of body and auxilliary axle 5 right parts are separately positioned in support side plate 2 and the drop tank 3, and be installed in respectively on the main bearing 4a and auxilliary bearing 5a of support side plate 2, be separately installed with primary seal cover 11 close-fitting and auxilliary stuffing box gland 11a in the support side plate 2 with it, collar bush 12 close-fitting with it is installed on main shaft 4, on the auxilliary axle 5 close-fitting auxilliary axle sleeve 12a with it is installed, collar bush 12 is arranged on to rotate in the primary seal cover 11 and with it and cooperates, auxilliary axle sleeve 12a is arranged on to rotate in the auxilliary stuffing box gland 11a and with it and cooperates, offer at least one annular groove respectively on collar bush 12 and the auxilliary axle sleeve 12a, piston ring is set respectively in the annular groove, and piston ring contacts with primary seal cover 11 and auxilliary stuffing box gland 11a respectively.Described annular groove is respectively first groove, second groove, the 3rd groove, the 4th groove, the 5th groove and the 6th groove, first groove and second groove are opened in respectively on the left part position of collar bush 12, and the 3rd groove is opened on the middle right part position of collar bush 12; The 4th groove and the 5th groove are opened in respectively on the left part position of auxilliary axle sleeve 12a, and the 6th groove is opened on the middle right part position of auxilliary axle sleeve 12a; Described piston ring is respectively first piston ring 21, second piston ring 22, the 3rd piston ring 23, the 4th piston ring 24, the 5th piston ring 25 and the 6th piston ring 26, first piston ring, 21 second piston rings 22 and the 3rd piston ring 23 are installed in first groove respectively, in second groove and the 3rd groove, the 4th piston ring 24, the 5th piston ring 25 and the 6th piston ring 26 are installed in the 4th groove respectively, in the 5th groove and the 6th groove, first piston ring 21, second piston ring 22 and the 3rd piston ring 23 contact the 4th piston ring 24 with primary seal cover 11 respectively, the 5th piston ring 25 and the 6th piston ring 26 contact with auxilliary stuffing box gland 11a respectively.

During making, process various component by above-mentioned requirements, first groove and second groove are opened in respectively on the left part position of collar bush 12, the 3rd groove is opened on the middle right part position of collar bush 12, first piston ring 21, second piston ring 22 are installed in respectively in first groove, second groove, and the 3rd piston ring 23 is installed in the 3rd groove; The 4th groove and the 5th groove are opened in respectively on the left part position of auxilliary axle sleeve 12a, the 6th groove is opened on the middle right part position of auxilliary axle sleeve 12a, the 4th piston ring 24, the 5th piston ring 25 are installed in respectively in the 4th groove, the 5th groove, the 6th piston ring 26 is installed in the 6th groove, then, by support side plate 2 primary seal cover 11 and auxilliary stuffing box gland 11a are cooperated respectively and be installed in collar bush 12 and auxilliary axle sleeve 12a and go up and get final product.

The utility model also can be taked only to offer first groove on the left part position of collar bush 12, on the left part position of auxilliary axle sleeve 12a, only offer the form of the 4th groove, first piston ring 21, the 4th piston ring 24 are installed in respectively in first groove, the 4th groove, and it also can realize preventing the purpose of pressurized air leakage.

The utility model is by above-mentioned sealing oil, the mode of gas and structural type, substitute traditional labyrinth seal and prevented compressed-air actuated leakage, and substituted the leakage that traditional oil sealing prevents lubricant oil, it has fundamentally solved the easy appearance leakage pressurized air of traditional roots blower existence and the problem of lubricant oil, and have the external factor of not being subjected to and influence, working life is longer, the evident characteristic that need not often change, it has not only guaranteed the working efficiency and the air feed quality of roots blower, and need not often carry out Maintenance and Repair, so saved lot of manpower and material resources, made operating cost reduce greatly.

First pollutant exhaust hole of offering respectively on the support side plate 2 of the present utility model 31 and second pollutant exhaust hole 32 are known technology.

Technological scheme described in the utility model is not limited only to the mode of execution of present embodiment record, can also have other mode of execution to finish the technical solution of the utility model.

The technology that the utility model is not described in detail, shape, structure partly are known technology.

Claims

1. lap seal formula roots blower, it comprises the body of roots blower, the compression chamber of body (1) right side is respectively equipped with support side plate (2) and drop tank (3), the main shaft of body (4) and auxilliary axle (5) right part are separately positioned in support side plate (2) and the drop tank (3), and be installed in respectively on the main bearing (4a) and auxilliary bearing (5a) of support side plate (2), it is characterized in that: be separately installed with primary seal cover close-fitting (11) and auxilliary stuffing box gland (11a) in the support side plate (2) with it, collar bush close-fitting with it (12) is installed on the main shaft (4), on the auxilliary axle (5) close-fitting auxilliary axle sleeve (12a) with it is installed, collar bush (12) is arranged on to rotate in the primary seal cover (11) and with it and cooperates, auxilliary axle sleeve (12a) is arranged on to rotate in the auxilliary stuffing box gland (11a) and with it and cooperates, offer at least one annular groove respectively on collar bush (12) and the auxilliary axle sleeve (12a), piston ring is set respectively in the annular groove, and piston ring contacts with primary seal cover (11) and auxilliary stuffing box gland (11a) respectively.

2. lap seal formula roots blower according to claim 1, it is characterized in that: described annular groove is respectively first groove, second groove, the 3rd groove, the 4th groove, the 5th groove and the 6th groove, first groove and second groove are opened in respectively on the left part position of collar bush (12), and the 3rd groove is opened on the middle right part position of collar bush (12); The 4th groove and the 5th groove are opened in respectively on the left part position of auxilliary axle sleeve (12a), and the 6th groove is opened on the middle right part position of auxilliary axle sleeve (12a); Described piston ring is respectively first piston ring (21), second piston ring (22), the 3rd piston ring (23), the 4th piston ring (24), the 5th piston ring (25) and the 6th piston ring (26), first piston ring (21) second piston rings (22) and the 3rd piston ring (23) are installed in first groove respectively, in second groove and the 3rd groove, the 4th piston ring (24), the 5th piston ring (25) and the 6th piston ring (26) are installed in the 4th groove respectively, in the 5th groove and the 6th groove, first piston ring (21), second piston ring (22) and the 3rd piston ring (23) contact with primary seal cover (11) respectively, the 4th piston ring (24), the 5th piston ring (25) and the 6th piston ring (26) contact with auxilliary stuffing box gland (11a) respectively.