CN2504406Y

CN2504406Y - Magnetic driving roots vacuum pump

Info

Publication number: CN2504406Y
Application number: CN 01244533
Authority: CN
Inventors: 胡扬五
Original assignee: Magnetive Drive Equipment Factory Of Wenzhou Industrial Science Research Institu
Current assignee: Magnetive Drive Equipment Factory Of Wenzhou Industrial Science Research Institu
Priority date: 2001-06-25
Filing date: 2001-06-25
Publication date: 2002-08-07
Anticipated expiration: 2011-06-25

Abstract

The utility model relates to a magnetic drive Roots vacuum pump, the utility model is characterized in that a coupling consists of an inner magnetic rotor, an outer magnetic rotor, and a guard sleeve, the guard sleeve is fixed on a pump body and separated the inner magnetic rotor and a pump shaft cover from the outside, the outer magnetic rotor and the inner magnetic rotor are both provided with permanent magnet materials, the linkage between the inner magnetic rotor and the outer magnetic rotor is formed by magnetic coupling, the whole silent-seal power transmission without mechanic dynamic-seal is achieved, the leakage problem of the mechanical seal of the power drive shaft is solved satisfactorily.

Description

Magnetic transmission type Roots pump

The utility model relates to a kind of magnetic transmission type Roots pump.

Roots pump is the most effective intermediate booster pump in the high vacuum unit, it can reach self ultimate vacuum in very short time, and bigger pumping speed arranged in very wide pressure range, but, owing to run up and mechanical wear, make the more fragile leakage of mechanical seal parts of Roots pump power force transmission shaft, especially high vacuum system, the leakage of the mechanical dynamic seal of its power transmission shaft can seriously influence vacuum quality, in modern high-tech field, as electronics industry, material industry, in the working environments such as surface treatment industry, high vacuum system is if existing to leak obviously to influence product quality and up-to-standard rate, and the requirement that solves this leakage problem is very urgent.

The purpose of this utility model is to provide a kind of advantage that can make full use of Roots pump high-speed high-vacuum degree, can overcome the run up Roots pump of the leakage problem that the mechanical wear that produces causes of its mechanical dynamic seal because of power transmission shaft again.

Roots pump of the present utility model is such: coupling is made of interior magnet rotor, outer magnet rotor and separation sleeve, interior magnet rotor and the pump shaft formation linkage structure that is fixedly connected, outer magnet rotor and the motor output shaft formation linkage structure that is fixedly connected, be provided with the separation sleeve of making by non-magnet_conductible material between outer magnet rotor and the interior magnet rotor, separation sleeve is fixed on the pump housing and interior magnet rotor and pump shaft is covered on wherein and is isolated from the outside, be equipped with permanent-magnet material on outer magnet rotor and the interior magnet rotor, constitute interlock by the magnetic force coupling between inside and outside magnet rotor.

Adopt the Roots pump of said structure: make separation sleeve with the non-magnetic material, be installed on the Roots pump pump housing with the static seal mode, interior magnet rotor and ambient atmosphere are separated fully, allow and act on power on the outer magnet rotor and pass separation sleeve by magnetic force and pass to interior magnet rotor, drive the operating rotor operation by interior magnet rotor, thereby realize the full-static sealing transmission of power of no mechanical motive sealing, solved power transmission shaft mechanical seal leakage problem satisfactorily.

To this reality and novel being described further, and provide embodiment below in conjunction with accompanying drawing.

Fig. 1 is the utility model example structure schematic representation;

Fig. 2 is Figure 1A-A sectional view.

Wherein: 1, the pump housing 2, driving gear 3, driven gear 4, rotor first 5, rotor second 6, driving shaft 7, driven shaft 8, filter plate 9, separation sleeve 10, seal ring 11, interior magnet rotor 12, outer magnet rotor 13, hitch 14, motor 15, bulge loop 16, pump shaft 17, output shaft 18, internal magnet bar 19, external magnet bar 20, seal ring.

As shown in Figure 1, motor 14 and Roots pump still adopt the Roots pump that has common motor now, therefore do not do unnecessary explanation here, coupling between them is by interior magnet rotor 11, outer magnet rotor 12 and separation sleeve 9 constitute, interior magnet rotor 11 is made cylindrical body by stainless steel material, the cylindrical body center is provided with the axis hole that cooperates with Roots pump pump shaft 16, periphery radially evenly is provided with several N, the internal magnet bar 18 that S is extremely alternate, internal magnet bar 18 is that the bonding magnetic steel by some same sizes constitutes on cylinder, interior magnet rotor 11 is fixedly mounted on the pump shaft 16, outer magnet rotor 12 is made barrel-shaped by stainless steel material, one end opens wide, bottom center is provided with the axis hole that matches with motor 14 output shafts 17, inboard wall is provided with and internal magnet bar 18 same number of external magnet bars 19, the same N of external magnet bar 19 polarity, S is alternate, also be to adopt bonding the forming of some measure-alike magnet, outer magnet rotor 12 is fixed on the output shaft 17, separation sleeve 9 is equally also made by the non-magnet_conductible material stainless steel, it is barrel-shaped to be shaped as thin-walled, one end opens wide, bucket is along being provided with the horizontal seal ring 20 that turns up, separation sleeve 9 and interior magnet rotor 11 are set in the outer magnet rotor 12 successively, leave the gap between the interior external diameter of separation sleeve 9 and interior magnet rotor 11 and the outer magnet rotor 12, on the pump housing 1, be that the center of circle is provided with a bulge loop 15 with pump shaft 16, bulge loop 15 and the pump housing 1 one, bulge loop 15 is provided with transition plate 8, seal ring 20 on the separation sleeve 9 is close on transition plate 8 planes, motor 14 is fixed on transition plate 8 planes by hitch 13, motor 14 is fixed on the transition plate 8 and with transition plate 8 by hitch 13 and is fixedly mounted on the pump housing 1, hitch 13 is that the both ends open formula is directly barrel-shaped, be set in outside the outer magnet rotor 12, avoid foreign material to enter and damage outer magnet rotor.

Claims

1, a kind of magnetic transmission type Roots pump, comprise the pump housing, rotor, motor and coupling, it is characterized in that: coupling is by interior magnet rotor (11), outer magnet rotor (12) and separation sleeve (9) constitute, interior magnet rotor (11) and pump shaft (16) the formation linkage structure that is fixedly connected, outer magnet rotor (12) and motor (14) output shaft (7) the formation linkage structure that is fixedly connected, be provided with the separation sleeve of making by non-magnet_conductible material (9) between outer magnet rotor (12) and the interior magnet rotor (11), separation sleeve (9) is fixed on that the pump housing (1) is gone up and interior magnet rotor (11) and pump shaft (6) is covered on wherein and is isolated from the outside, be equipped with permanent-magnet material on outer magnet rotor (12) and the interior magnet rotor (11), constitute interlock by the magnetic force coupling between inside and outside magnet rotor.

2, Roots pump according to claim 1, it is characterized in that: interior magnet rotor (11) is the cylindrical body that a center is provided with the axis hole that matches with pump shaft (6), the post radial surface evenly is provided with some N, the magnet strip that S is extremely alternate (18), outer magnet rotor (12) is that a bottom center is provided with axis hole and the unlimited tubbiness member of an end that matches with motor (14) output shaft (17), evenly be provided with and internal magnet bar (18) similar number and N on the position of the last internal magnet bar (18) of corresponding interior magnet rotor (11) on the wall inboard, the external magnet bar (19) that S is extremely alternate, interior magnet rotor (11), separation sleeve (9) concentric locking collar successively is located in the outer magnet rotor (12).

3, Roots pump according to claim 1 and 2 is characterized in that: the pump housing (1) links into an integrated entity by hitch (13) with motor (14).