CN2223372Y

CN2223372Y - Roots vacuum pump

Info

Publication number: CN2223372Y
Application number: CN 95233039
Authority: CN
Inventors: 陈飞鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-02
Filing date: 1995-01-02
Publication date: 1996-03-27
Anticipated expiration: 2005-01-02

Abstract

The utility model relates to a Roots vacuum pump, which comprises a pump body, a shaft, a front and a back side covers, a front and a back supporting bases, a front and a back bearing chambers, a driving gear, a driven gear, a driving rotor and a driven rotor. The driving rotor and the driven rotor are in the shape of a straight-tooth wire with four leaves, and the leaf tooth angles of the rotors are from 0 DEG to 10 DEG. The pumping speed rate of the utility model reaches to 60m<3>/min, and the final vacuum reaches to 1.4038x 10<5> Pa. The utility model has the advantages of long service life, stable operation, high efficiency, and low power consumption, and can be used for vacuum dewatering and pipeline oil hydraulic pressure transportation in industries such as oilfield industry, paper making industry, chemical industry, printing industry, cable industry, food industry, etc.

Description

A kind of Roots pump

The utility model relates to a kind of fluid varactor machine, specifically a kind of Roots pump.

We know that vacuum pump is various, and existing Roots pump is made up of the pump housing, axle, front and back side cover, antero posterior axis bearing, driving gear and driven gear and power rotor and driven rotor mostly.Power rotor and driven rotor have two blades, and four-bladed is also arranged, and as four leaf zigzag shape wet type Roots pumps, the moving rotor of its principal and subordinate is four leaf spiral forms, and helix angle is 14 °～17 °, intermeshes.But helical rotor in the running, likeness in form line family envelope, could form when the point of contact of line family envelope and axis horizontal are tangent and bleed, cause the error between time and the space, so helical rotor in the running, it is unsaturated to bleed, and in the helical rotor course of working, technical difficulty is big, difficult quality guarantee, reduce the speed of exhaust and the effect of vacuum pump, limited its practicability greatly.

The purpose of this utility model is exactly to have the inertia of company, the Roots pump that pumping speed rate and limiting vacuum are high in order to overcome the deficiency of existing four leaf helix Roots pumps, a kind of rational in infrastructure, rotor easy processing to be provided, aspirating.

For achieving the above object, a kind of Roots pump, it is made up of the pump housing, axle, front and back side cover, front and back supporting base, front and back bearings chamber, lively gear and driven gear and power rotor and driven rotor, it is characterized in that it is four leaf straight-tooth wire that the principal and subordinate moves rotor, and rotor leaf-teeth angle is 0 °～10 °.

The utility model is because the moving rotor of principal and subordinate adopts four leaf straight-tooth wire, when it rotates, form unification in pump chamber, eliminated the error between rotor rotational time and the space with the pump chamber axis horizontal, bleeding has the saturated inertia that connects, and can improve the pumping speed rate and the limiting vacuum of vacuum pump so greatly.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the utility model structural representation,

Fig. 2 is A among Fig. 1-A face cut-away view.

Fig. 1, Fig. 2 also are embodiment's schematic representation.

As can be seen from Figure 1, a kind of Roots pump, it is provided with the pump housing 6, axle 2, front side cap 3, rear side cover 12, preceding supporting base 5, back supporting base 8, fore bearing chamber 4, rear bearing chamber 9, voltage stabilizing silencer box 7, driving gear 10, driven gear 11.Coupling 1 is installed on axle 2, and the coupling of itself and motor is direct-connected, for the utility model provides power.Axle 2 passes pump chamber, by the supporting base 5,8 and bearing chamber 4,9 supportings of both sides before and after the pump housing.Be provided with driving gear 10, driven gear 11, driving gear 10 drive driven gears 11 in the rear end of axle 2, they do reverse constant speed rotation, thereby make the rotor in the pump chamber also do reverse constant speed rotation.The top of the utility model pump housing 6 also is provided with voltage stabilizing silencer box 7 and outlet.Two rotors constantly produce in pump chamber and enlarge separation process, and volume constantly is compressed and expanding, thereby reach air water or fluid is discharged from outlet, make it finish vacuum dehydration or fluid is carried task.Above-mentioned technology belongs to prior art, and this does not describe in detail.

Main improvement of the present utility model is power rotor and driven rotor, as shown in Figure 2, in pump chamber, be provided with two rotors, power rotor 13 and driven rotor 14, they are four leaf straight-tooth wire, rotor leaf-teeth angle is 0 °～10 °, when straight-tooth wire rotor rotates in pump chamber,, make it to form unification with axis horizontal because the rotor leaf is the straight-tooth wire, eliminated the error between rotor rotational time and the space, the rotor rotation has been bled have the inertia of company.And straight-tooth wire rotor is adding man-hour, be under static state, form by the milling cutter cutting, steady quality has improved the dynamically balanced stability of rotor rotation, because reverse constant speed engagement rotation is done in the raising of rotor technology quality, power rotor 13 and driven rotor 14 in pump chamber, remaining good performance, make and continuously produce vacuum pressure in the pump chamber, its pumping speed rate reaches 60m ³/ min, limiting vacuum reaches 1.4038 * 10 ⁵Pa,

Solve existing Roots pump suction and do not connected the deficiency of being used to.The utility model long service life, running are stable, and effect height, power consumptive province can be widely used in the vacuum dehydration and the pipeline fluid force feed of industries such as oil, papermaking, chemical industry, printing and dyeing, cable, food.

Claims

1, a kind of Roots pump, it is made up of the pump housing, axle, front and back side cover, front and back supporting base, front and back bearings chamber, driving gear and driven gear and power rotor and driven rotor, it is characterized in that the moving rotor of principal and subordinate is four leaf straight-tooth wire, rotor leaf-teeth angle is 0 °～10 °.