CN2104957U

CN2104957U - Wet-type roots vacuum pump with four spiral lines form

Info

Publication number: CN2104957U
Application number: CN 91225388
Authority: CN
Inventors: 陈芝鹤
Original assignee: WANDA CRANE ENGINEERING EQUIPMENT PLANT PINGYANG COUNTY ZHEJIANG PROV
Current assignee: WANDA CRANE ENGINEERING EQUIPMENT PLANT PINGYANG COUNTY ZHEJIANG PROV
Priority date: 1991-09-22
Filing date: 1991-09-22
Publication date: 1992-05-20

Abstract

The utility model relates to the vacuum pump in the fluid machinery and is especially a wet type roots vacuum pump with four spiral line shape. The wet type roots vacuum pump with four spiral line shape is composed of an axle, a front side cover, a front axle bearing seat, a pump body, a back axle bearing seat, a back side cover, a driving tooth wheel, a driven tooth wheel, a driving rotor and a driven rotor. The wet type roots vacuum pump with four spiral line shape is characterized in that the driving rotor and the driven rotor are in the four spiral line shape and the spiral angle is 14 DEG-17 DEG. The driving rotor is meshed with the driven rotor and the pressure angle of the wet type roots vacuum pump with four spiral line shape is 35 DEG-45 DEG. When the wet type roots vacuum pump with four spiral line shape works, the ultimate vacuum reaches to 2.00*10+[4]pa and the pumping rate of speed reaches to 6m+[3]/min. The utility model has the advantages of high efficiency, saved power consumption, long service life and stable operation. The wet type roots vacuum pump with four spiral line shape can be widely used in industries, such as the petroleum, the paper, the chemical engineering, the printing, the cable, the food product, etc.

Description

Wet-type roots vacuum pump with four spiral lines form

The utility model relates to the Roughing pump class of fluid machinery, particularly four leaf zigzag shape wet type Roots pumps.

Roots pump in the past is to make it mutual counterrotating force feed gas by synchromesh gear by two ∞ shape rotors that stagger mutually in casing.Its structure is made up of axle, front side cap, front-end bearing pedestal, the pump housing, rear bearing block, rear side cover, driving gear, driven gear, power rotor and driven rotor.Said rotor is that double leaf spur type or blade are the steel plate welding type, when working rotor turns round, can not form the continuity and the stability of suction, and aspiration procedure is the surge shape, and promptly pumping speed is low, suction frequency discontinuity instability.Therefore reduced the pumping speed rate, effect reduces.The limiting vacuum of the Roots pump of water filling only is about 6.6KPa.Therefore limited its application greatly.

The purpose of this utility model provides a kind of four leaf zigzag shape wet type Roots pumps, improves pumping speed rate and ultimate vacuum greatly.

The utility model is finished as follows: with rotor, promptly power rotor and driven rotor make four leaf zigzag shapes, and the helix angle of its helix is 14 °～17 °, and power rotor and driven rotor intermesh, and its pressure angle is between 35 °～45 °.

The utility model has been compared following advantage with conventional art: 1. owing to have four leaf zigzag shape rotors, improved pumping speed rate and ultimate vacuum, the pumping speed rate reaches 6m ³/ min, limiting vacuum 2.00 * 10 ⁴Pa; 2. the unsettled shortcoming of suction frequency discontinuity and the two lobe rotor that have overcome the double leaf Roots pump force the noise of expanding when compressing the motion of discharge air water; 3. improve effect greatly, long service life, running is steady, and reduces equipment investment relatively and save electricity consumption.

Further specify below in conjunction with accompanying drawing.

Fig. 1 is a general assembly drawing of the present utility model.

Fig. 2 is the crosscut sectional view of Fig. 1.

With reference to Fig. 1, the utility model is made of axle (1), front side cap (2), front-end bearing pedestal (3), the pump housing (4), rear bearing block (5), rear side cover (6), driving gear (7), driven gear (8), power rotor (9) and driven rotor (10).Power rotor (9) and driven rotor (10) are made four leaf zigzag shapes, and the helix angle of helix is 14 °-17 °; Power rotor (9) and driven rotor (10) intermesh, and its pressure angle is 35 °～45 °, and getting its optimum pressure angle is 40 °.Axle (1) is gone up the V belt wheel is installed, drag by motor, make zigzag shape power rotor (9) rotation in the pump chamber, thereby make highi degree of accuracy driving gear (7) transfer driven gear (8) of rotor (9) right-hand member, make itself and driving gear (7) do the constant speed counter-rotating, pump chamber bottom two rotors are constantly produced enlarge separation, cause the continuous compressing and expanding of volume, compression air water or fluid are discharged from outlet, finish vacuum dehydration or force feed fluid.

With reference to Fig. 2, the pump housing (4) inner chamber two four leaf zigzag shapes rotor (9), (10), engagement and space distribution situation.Power rotor (9) waits the speed in reversed direction running with driven rotor (10) work in pump chamber, and the helix angle of blade is 14 °-17 °, keeps engagement rotation all the time, constantly produces vacuum pressure in pump chamber continuously, improves pumping speed rate and pressure.Because four leaf zigzag shape rotor engaged performances are good, solved the interrupted wavy motion that is when aspirating atmosphere or liquid discharge, the continuity of aspiration vacuum can be used air-water mixture when having solved the work running again, and dried humid gas also can aspirate medium.The pumping speed rate reaches 6m ³/ min, limiting vacuum 2.00 * 10 ⁴Pa(150Torr), import cross section mean velocity 11.2m/S, import cross section air mass flow 693.3m ³/ h.

The utility model can be widely used in the vacuum dehydration of industries such as oil, papermaking, chemical industry, printing and dyeing, cable, food, pipeline fluid force feed.

Claims

1, four leaf zigzag shape wet type Roots pumps, form by axle (1), front side cap (2), front-end bearing pedestal (3), the pump housing (4), rear bearing block (5), rear side cover (6), driving gear (7), driven gear (8), power rotor (9) and driven rotor (10), it is characterized in that:

A, power rotor (9) and driven rotor (10) are four leaf zigzag shapes;

The helix angle of B, helix is 14～17 °;

C, power rotor (9) intermesh with driven rotor (10), and pressure angle is 35 °～45 °.

2,, it is characterized in that power rotor (9) and the intermeshing pressure angle of driven rotor (10) are 40 ° according to the said vacuum pump of claim 1.