CN2324339Y

CN2324339Y - Centrifugal oil-sealed gas sealing device for rotation axis

Info

Publication number: CN2324339Y
Application number: CN 98204704
Authority: CN
Inventors: 张德才
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-18
Filing date: 1998-05-18
Publication date: 1999-06-16
Anticipated expiration: 2008-05-18

Abstract

The utility model relates to a centrifugal oil-sealed gas sealing device for a rotation axis. A gas-sealed impeller and an oil-sealed impeller are arranged on the rotation axis, and a gas sealing cavity and an oil sealing cavity are correspondingly formed between a sealing body and the rotation axis which are connoted. The sealing body is fixed in a machine body and is provided with an oil storage chamber and an oil hole which is led to the oil sealing cavity. A cooling water tank is arranged on the sealing body to surround the oil sealing cavity. The utility model has the advantages of reasonable structure, reliable seal, difficult member damage, easy maintenance, etc. The utility model is an ideal device for the gas seal of the rotation axes of various machines under inflammable, explosive and virulent working conditions.

Description

A kind of centrifugal oil-sealed air sealing device of running shaft

The utility model relates to the rotation shaft seal, specifically, is a kind of centrifugal oil-sealed air sealing device that is applicable to the running shaft of the various machineries that do not allow gas leakage.

The leakage of working medium can cause the waste of material in the machinery, influence volumetric efficiency, and befouling environment, inflammable, explosive, hypertoxic, corrosivity, radioactive material leak the safety that jeopardizes the person and equipment, therefore, sealability is to estimate an important indicator of mechanical product quality.At present, the hermetic seal of running shaft is mainly contained packing seal and labyrinth seal, also use mechanical seal on some equipment of having relatively high expectations.Packing seal is by compressing filler, relying on filler closely to contact the purpose that reaches sealing gas with axle.Picture CN2092972U disclosed " shaft sealer " is exactly a kind of typical example, and owing to filler friction, wearing and tearing can produce the gap and leak gas, therefore this packing seal life cycle is short, needs the operator often to safeguard.Labyrinth seal is contactless rotation axis seal structure, and it is progressively to reduce the purpose that gas pressure realizes reducing gas leakage by the labyrinth resistance, can not reach desirable sealing effect.Mechanical seal must have the sparge water cooling, and the lubrication and seal face requires height to sealing surface and assembly precision, vibration equipment, and the bearing play all can influence its sealing effect and working life, so the mechanical seal effect is also unreliable, and the cost height.

Goal of the invention of the present utility model is intended to overcome the deficiency of prior art, and a kind of centrifugal oil-sealed air sealing device is provided, and makes running shaft air tight, reaches 100% sealing, and has advantage fragile, not easy to maintenance.

The technical solution of the utility model includes running shaft, body and seal arrangement, the detailed structure of seal arrangement is that sealing gland impeller and oil sealing impeller are set respectively on running shaft, accordingly, between coupled seal, form gas seal chamber and the oil seal chamber that interconnects, and communicate with atmosphere.Blade wheel structure on the running shaft can be on the adjacent different cross section of running shaft, is evenly distributed to few 3 sealing gland impellers and 3 oil sealing impellers along the running shaft outer surface.Seal divides two-part up and down, sealing upper body and sealing lower body are fixed on respectively in upper machine body and the lower body, the location piece of rotation inhibiting is housed between seal and the body, seal is provided with accumulator and oil hole, pasta communicates with atmosphere, the oilhole that leads to impeller root in the oil seal chamber is arranged at the accumulator bottom, also is provided with bosh around the oil seal chamber on seal, and water intake and water outlet are arranged.On the separating surface of sealing upper body and lower body, sealing gasket is housed, between seal and body, seal ring is housed.

The utlity model has following advantage and effect: (1), sealing gland impeller rotate with the axis and make gas compression in the gas seal chamber, set up a pressurized gas ring, created condition of negative pressure for the oil suction in the accumulator of oil seal chamber, simultaneously, the oil sealing impeller also rotates with the axis, paraxial part forms negative pressure, promptly in accumulator, suck oil, under action of centrifugal force, oil is got rid of to circumference, form a high pressure oil ring, reliably with pressurized gas and atmospheric isolation, gas reached 100% sealing.(2), the pasta of accumulator communicates with atmosphere with gap between the seal by running shaft, the oilhole that leads to impeller root in the oil seal chamber is arranged at the bottom of the chamber, when axle rotates, owing to have pressure reduction, oil to be inhaled in the oil seal chamber, when stopping the rotation before and after the impeller, air pressure before and after the impeller equates, be barometric pressure, oil is just flow back in the accumulator standby by oilhole, divides at the upper-lower seal body and sealing gasket is housed on the face has prevented oily leaking.(3), the running shaft high speed rotating can make impeller and oil drag heating, therefore around oil seal chamber arranged outside bosh, by circulating water heat is taken away, guaranteed that sealing oil does not gasify, between body and seal, seal ring is housed, has prevented leaking outside of cooling water.(4), for convenient for installation and maintenance, seal is divided into up and down two-part, and positioning device is arranged.In a word, the utility model is rational in infrastructure, and sealing is reliable, and member is not fragile, can realize that fault-free turns round continuously, and maintaining is easy.

Accompanying drawing 1 is a main structure schematic representation of the present utility model;

Accompanying drawing 2 is the A-A sectional view of Fig. 1;

Accompanying drawing 3 is sealing upper body structural representation;

Accompanying drawing 4 is sealing lower body structural representation;

Accompanying drawing 5 is the blade wheel structure schematic representation;

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

As Fig. 1, shown in 2, it is the centrifugal oil-sealed air sealing device that is used for a kind of running shaft of gas compressor, on running shaft 5 as shown in Figure 5, evenly arrange 12 sealing gland impellers (8) and oil sealing impeller (9) formation gas seal chamber (10) and oil seal chamber (11) accordingly and between sealing upper body (4) the sealing lower body (3) along the axle outer surface, and be communicated with atmosphere, sealing upper body (4) and sealing lower body (3) are separately fixed in upper machine body (2) and the lower body (1), the location piece (16) of rotation inhibiting is housed between lower body (1) and sealing lower body (3), sealing lower body (3) is provided with accumulator (6), has the oilhole (12) that leads to impeller (9) root in the oil seal chamber (11) to have oil hole (15) and connection at the bottom of the chamber on sealing upper body (4).Shown in Fig. 1,3,4, be positioned at Seal cage (11) outside and water cooling tank (7) be set around sealing upper body (4), sealing lower body (3), on lower body (1), have water intake (13), have water outlet (14) on the upper machine body (2).Shown in Fig. 3,4, on the separating surface of sealing upper body (4) and sealing lower body (3), sealing gasket (18) is housed, between seal (3,4) and body (1,2), seal ring (17) is housed.

Claims

1, a kind of centrifugal oil-sealed air sealing device of running shaft, include running shaft, body and seal arrangement, it is characterized in that described seal arrangement is that sealing gland impeller (8) and oil sealing impeller (9) are set respectively on running shaft, between coupled seal, form gas seal chamber (10) and oil seal chamber (11) accordingly, and be communicated with atmosphere, seal is fixed in the body, seal is provided with accumulator (6) and oil hole (15), the accumulator liquid level communicates with atmosphere, the oilhole (12) that leads to oil seal chamber (11) is arranged at the bottom of the chamber, on seal, be provided with bosh (7), and water intake (13) is arranged around oil seal chamber (11), water outlet (14).

2, according to the centrifugal oil-sealed air sealing device of the described running shaft of claim 1, it is characterized in that described seal is divided into two-part up and down, sealing upper body (4) and sealing lower body (3) are fixed on respectively in upper machine body (2) and the lower body (1), and location piece (16) is housed between seal and body.

3,, it is characterized in that described accumulator (6) is provided in a side of in sealing lower body (3), and be communicated with oil hole (15) on the sealing upper body (4) according to the centrifugal oil-sealed air sealing device of claim 1,2 described running shafts.

4, according to the centrifugal oil-sealed air sealing device of claim 1,2 described running shafts, it is characterized in that described sealing upper body (4) with the sealing lower body (3) separating surface on sealing gasket (18) is housed, between seal (3,4) and the body (1,2) seal ring (17) is housed.

5,, it is characterized in that the described oilhole (12) that leads to oil seal chamber (11) bottom accumulator (6) is the root that leads to impeller (9) according to the centrifugal oil-sealed air sealing device of the described running shaft of claim 1.

6, according to the centrifugal oil-sealed air sealing device of the described running shaft of claim 1, it is characterized in that being provided with respectively on the described running shaft sealing gland impeller (8), oil sealing impeller (9), be on the adjacent different cross section of running shaft (5), be evenly distributed to few 3 sealing gland impellers and 3 oil sealing impellers along the running shaft outer surface.