CN105626554A

CN105626554A - Centrifugal supercharger

Info

Publication number: CN105626554A
Application number: CN201610152867.8A
Authority: CN
Inventors: 石雪松
Original assignee: Beijing Site Turbomachinery Co Ltd
Current assignee: Beijing Site Turbomachinery Co Ltd
Priority date: 2016-03-17
Filing date: 2016-03-17
Publication date: 2016-06-01

Abstract

A centrifugal supercharger comprises a power input shaft, a large gear, a small gear shaft, a shaft sleeve, an impeller, an exhaust wheel, a bearing, a coupler, a volute casing and the like. The centrifugal supercharger is characterized in that the large gear is mounted on the power input shaft and is engaged with the small gear shaft through inclined teeth, and through an inclined gear, mechanical transmission will be more stable and safer; the impeller, the exhaust wheel, the shaft sleeve, a shaft head nut and other parts are mounted on the small gear shaft to form a main component of the centrifugal supercharger, and the main component is a rotor of the centrifugal supercharger; and the exhaust wheel is arranged on the outer side of a sealing device at the contact position of the impeller and the volute casing of the supercharger. A casting structure is adopted in a machine shell, and an X-shaped structural manner is adopted in an upper volute casing body and a lower volute casing body; a stainless steel closed type impeller is adopted as the impeller, a blade manner of a backward bending structure is adopted in blades, the blades are alternative in length, and the number of the blades is 11; and according to the centrifugal supercharger, the working efficiency is greatly improved, the manufacturing and maintaining cost is greatly reduced, the service life of the supercharger is greatly prolonged, and the centrifugal supercharger is unanimously praised.

Description

A kind of centrifugal supercharger

Technical field

The invention belongs to the technical field of supercharger, it is related specifically in chemical technology field with so that the pressure of gas has improved the centrifugal supercharger of later technique.

Background technology

At present, in the middle of petroleum chemical industry, centrifugal supercharger is an important equipment of catalytic unit, for carrying out supercharging to from main air blower main wind out, a main wind part after supercharging is used as the fluidized wind getting device outward, another part enters external warmer riser bottom, returns the lifting wind of revivifier dense bed as catalyzer in external warmer, for counter-current regeneration provides impellent.

The supercharger applied in major part petroleum chemical industry at present comprises power input shaft, power output shaft, impeller, the part composition such as sealing and housing, power input shaft and power output shaft adopt meshed transmission gear, sealing pad is enclosed within power output shaft and is rotatably assorted with it, impeller permanent sleeve is in power output shaft, housing is fixedly connected with sealing pad outside being enclosed within power output shaft, impeller in appeal structure is by titanium alloy inducer and titanium alloy impeller diffuser portion and expensive, and anti-erosion property is poor, cause impeller shorter for work-ing life, the cost of overhaul increases.

How effectively to make the efficiency of supercharger improve, it may also be useful to the time lengthening in life-span, reduce maintenance cost, it is provided that the supercharger of a kind of high efficient and reliable just becomes the target that the art scientific and technical personnel pursue.

Chinese patent CN202065202U discloses one " benzene Fei Er Steam Compressor ", it is characterised in that: this product comprises power input shaft, power output shaft, the impeller being made up of inducer and impeller diffuser portion, Labyrinth seal dish cover and volute; The driving toothed gear of power input shaft told engages with the follower gear in power output shaft; Described Labyrinth seal dish is enclosed within power output shaft and is rotatably assorted with it, and described impeller permanent sleeve is in power output shaft; Described volute is enclosed within power output shaft and outward and is fixedly connected with Labyrinth seal dish cover; Described impeller is integrally formed by stainless steel inducer and stainless steel impeller diffuser portion. Some aspect described in it has much room for improvement in addition, can be more superior by the performance and efficiency improving rear machine.

Chinese patent CN200996384Y discloses one " single-stage cantilever recycle gas compressor ", and it comprises housing and installs impeller within it, and main shaft is connected on plumer block by steady bearing, and one end of main shaft is cantilever end, is plugged in housing; Impeller is arranged on the cantilever end of main shaft, is positioned at outside steady bearing, and links with main shaft; Sealing it is provided with between impeller and steady bearing; Described sealing is followed successively by high-temperature buffer hermetic seal, dry gas seals from impeller to steady bearing; Described steady bearing is a set of.

Though the product of above-mentioned all inventions obtains application in the industrial production, but product some in the leeway that is also improved, especially the working wheel (i.e. impeller) on the major parts of product and rotor and rotor, also has the tightness system of compressor, the research of all many parts such as the shape of machine shell, by the working efficiency of deep research product, the maintenance cost of saving, and work scope all can significantly promote. The to sum up starting point of these our research work just.

Summary of the invention

For the weak point in existing technology, the present invention provides one working range width in the middle of petroleum chemical industry, efficiency height, it may also be useful to the life-span is long, and the centrifugal supercharger that Measuring error cost is lower.

The present invention provides a kind of centrifugal supercharger, and it mainly comprises: power input shaft, master wheel, shaft pinion, axle sleeve, sealing, impeller, exhaust wheel, bearing, shaft coupling, volute etc., it is characterised in that:

(1) master wheel is arranged on power input shaft and is engaged each other by helical teeth with shaft pinion, it may also be useful to twisted spur gear can make mechanical transmission more steadily safety;

(2) part such as impeller, exhaust wheel, axle sleeve and axis head nut is arranged on shaft pinion to form the major parts of centrifugal supercharger and the rotor of centrifugal supercharger;

(3) air draft is had to take turns in the arranged outside of the impeller of supercharger and the tightness system of volute contact position, when centrifugal supercharger works, the gaseous tension of volute inside is than big, gas can produce power outward, but this invention is equipped with air draft wheel in sealing outside, and this air draft wheel can produce to the inside a power when rotated, therefore the power of both sides can be cancelled out each other, make sealing effect better so that the range of application of this invention is broader so that the life-span of sealing element extends;

(4) the machine shell of the centrifugal supercharger of the present invention adopts casting volute, decreases some other operation, and the upper and lower volute of this product adopts X type structure, the efficiency of centrifugal supercharger is very helpful;

(5) what the impeller of the centrifugal supercharger of the present invention adopted is stainless steel trash-type impeller, blade adopts the blade shape of palintrope structure, alternate each 11 of blade length, compared with the unshrouded impeller of other products, the whole efficiency of unit has greatly improved.

The centrifugal supercharger of the present invention is product by constantly putting into practice and study and design on former basis, the everyway of unit careful research and improvement are done so that the life-span of the working efficiency of this product, manufacture and maintenance cost, product is all greatly improved. The centrifugal supercharger of the present invention, in the use procedure of user, is subject to the consistent favorable comment of user, obtains the welcome of users.

Accompanying drawing explanation

Fig. 1 is the front sectional view of the centrifugal supercharger of the present invention, and Fig. 2 is the volute schematic diagram of centrifugal supercharger.

Embodiment

Below in conjunction with the drawings and specific embodiments, the centrifugal supercharger of the present invention is described in further detail.

Fig. 1 is the front sectional view of the centrifugal supercharger of the present invention, as shown in the figure. Centrifugal supercharger comprises air intake cylinder 1, upper volute 2, lower volute 3, shaft end nut 4, impeller 5, seal assembly 6, exhaust wheel 7, bearing 8, shaft pinion 9, power input shaft 10, shaft coupling 11, upper-cover 12, lower support 13. Impeller 5 and air draft wheel 7 are arranged on shaft pinion, impeller makes it fix by shaft end nut 4, being placed on lower support by the shaft pinion installed and have bearings, power input shaft 10 is combined with shaft pinion by a master wheel, upper-cover and lower support is installed.

Fig. 2 is the volute schematic diagram of centrifugal supercharger. It includes volute 2, lower volute 3, bolt 15, upper and lower volute is tight by bolt-connection handle, and together form the main working parts of supercharger with impeller 5, upper volute is equipped with out air port 14, air duct becomes vertical state to air intake cylinder 1 with going out, installed by seal assembly, then centrifugal supercharger civilian dress has been joined.

What the impeller of the centrifugal supercharger of the present invention adopted is the trash-type impeller of palintrope form, each 11 blades of length are alternate to be uniformly distributed, material selection KMN type stainless steel, and blade is become by Milling Process, being integrated with lower wheel disc, upper wheel cap and lower wheel disc adopt and are welded. The centrifugal supercharger of the present invention adopts its working efficiency of trash-type impeller much higher than semiclosed-type impeller efficiency, meanwhile also more can meet the requirement of petroleum chemical industry, can bring bigger benefit to user.

In order to make the sealing better effects if of supercharger, and the longer service life of sealing member, after the seal assembly in the centrifugal supercharger of the present invention portion after the impeller, air draft wheel is installed, when unit is worked by driven by motor, the change of team of impeller high-speed rotary produces the pressure given to the gas on right side, gas can by sealing to outward leakage, meanwhile air draft wheel is also following shaft pinion high speed rotating, gas can be made to produce a pressure to the left, thus these two power are cancelled out each other, the effect of sealing can be made more remarkable, also can ensure the work-ing life of seal assembly simultaneously, thus decrease maintenance cost, because good sealing effect, also the range of application of unit can be made wider, improve the over-all properties of complete machine.

The foregoing is only the preferred embodiments of the present invention, be not limited to the specific form of the structure of the present invention, for a person skilled in the art, the present invention can have multiple change and change. Within the spirit and principles in the present invention all, any amendment of making, equivalent replacement, improvement etc., all should be included within the claims of the present invention.

Claims

1. a centrifugal supercharger, it comprises: power input shaft, master wheel, shaft pinion, axle sleeve, sealing, impeller, exhaust wheel, bearing, shaft coupling, volute etc., it is characterised in that:

(3) air draft is had to take turns in the arranged outside of the impeller of supercharger and the tightness system of volute contact position.

2. by centrifugal supercharger according to claim 1, it is characterised in that said machine shell adopts casting structure, and upper and lower volute adopts X type structure formation.

3., by centrifugal supercharger according to claim 1, it is characterised in that what said impeller adopted is stainless steel trash-type impeller, blade adopts the blade shape of palintrope structure, alternate each 11 of blade length.