DE2700226C2

DE2700226C2 - Rotary piston blower or vacuum pump

Info

Publication number: DE2700226C2
Application number: DE19772700226
Authority: DE
Inventors: Klaus 6332 Ehringshausen Rumpf
Original assignee: Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
Current assignee: RUMPF, KLAUS, 6332 EHRINGSHAUSEN, DE
Priority date: 1977-01-05
Filing date: 1977-01-05
Publication date: 1985-04-04
Also published as: DE2700226A1

Description

27 OO 22627 OO 226

muß nach unten zum Auslaß der Pumpe abfließen.must drain down to the outlet of the pump.

In F i g. 3 hat das Wellenende die Bezeichnung 20. Der nur teilweise gezeichnete Drehkolben 21 hat eine verhältnismäßig tiefe Ringnut 22, in welcher die von einer mit der Wand 23 des Lagerschildes fest verbundenen Abweisbuchse 24 getragenen Dichtungsringe 25 nach außen spannend geführt werden. Die Abweisbuchse 24 ist so gestaltet, daß sie mit der Wand 23 eine Rinne 26 bildet, in der sich Kondensat sammeln kann. Zwischen der Sitzfläche der Dichtungsringe 25 und der Seitenfläehe des Drehkolbens hat die Ringnut im Drehkolben 21 eine konische Erweiterung 27 nach außen, die dafür sorgt, daß bei Drehung der Drehkolben eventuell eindringendes Kondensat nsch außen fortgeschleudert wird.In Fig. 3, the shaft end has the designation 20. The only partially drawn rotary piston 21 has a relatively deep annular groove 22 in which the one firmly connected to the wall 23 of the end shield Abweisbuchse 24 borne sealing rings 25 are guided to the outside exciting. The deflector sleeve 24 is designed so that it forms a channel 26 with the wall 23 in which condensate can collect. Between the seat surface of the sealing rings 25 and the side surface of the rotary piston, the annular groove in the rotary piston 21 has a conical widening 27 to the outside, which for this ensures that when the rotary piston rotates, it may penetrate Condensate is thrown away outside.

For this purpose 3 sheets of drawings

2020th

2525th

3030th

3535

4040

5555

Claims

27 OO 226

ning line to the gearbox housing is provided

Claim: a Roots blower as shown in AT-PS1 96 541 is, an overpressure is created on a labyrinth seal

Rotary piston blower or vacuum pump with two devices applied and thus generates a gas flow that

parallel-axis, in one of the bearing shields on the side 5 prevents oil from entering the pump chamber,

Borrowed limited housing cavity without contact. In these known pumps, the aim is to prevent

revolving rotary lobes, which are shafted on both sides, that oil from the gear chambers into the head chamber

ends are stored in bearings, which can be found in the. One has relied on you to

Bearing shields are located, with the shaft ends in processing measures that prevent the overflow of the lubricant

Prevent housing chambers filled with lubricant from getting out of the bearing chambers into the working area

protrude and at shaft penetration points between the should also fulfill the purpose that is required in the pump chamber.

Bearing and the rotary lobe side surfaces each falling condensate at the upper step into the lubricant

Seals are arranged to prevent open spaces.

indicates that around the Welienenden (4, 5, The invention has the task

10, 11) placed around in the rotary piston side faces ring 15 to indicate a device which is suitable

Grooves (17) are provided, which is on their outside, condensates or other accruing in the scoop space

circumferential walls towards the end shields (6, 12), liquids that have penetrated from the shaft through-holes

niche and keep it safely away in the bearings in the bearing shields.

holding deflector bushings (16 or 24) protrude, for this purpose it is proposed according to the invention that to through the shaft ends on the inner surfaces of the end shields into the rotary piston side surface end Liquid proportions are provided in the annular grooves (17) chen annular grooves, which are guided on their eye are conical ßenkreiswandwand to the end shields

expand and into the one held in the end shields

_% ID sockets protrude through which on the inside

25 surfaces of the end shield running down liquid fractions

are passed into the ring grooves.

The invention relates to rotary piston blowers or -va- The down on the inner surfaces of the end shields-

In this way, liquid pumps in line with the preamble of the patent are the

Saying. Lateral surfaces of the piston fed so that they through the

With pumps of this type, a centrifugal force protrudes on one side.

Shaft end over the La ^ mountCJ to accommodate one of those points down to the outlet port of the pump

Drive coupling or drive, washer out, and flow off without being in the area of the shaft

the other side protrudes two willows to get to the reception points.

me of the gears guaranteeing synchronization. In the following, the

beyond the end shield. The invention is described in more detail on both sides with reference to the drawings.

Cover provided, the housing chambers for the on-It shows

take the bearing or form gears. This Exactly- F i g. 1 shows a horizontal longitudinal section <l urch a

sekammem are up to a certain height with rotary piston blower along two rotary pistons,

Filled lubricant, which in a suitable manner, for. B. Fi g. 2 shows a longitudinal section through its bearing point for

a rotary piston by means of centrifugal disks, the bearings or gears 40,

and on the other hand mostly a bearing point for a rotary piston with or labyrinth seals on a step into the shaft seal in an annular groove of the piston by splash rings Fig. 3,
Working spaces located between the end shields According to FIG. 1 are located in the housing 1, the two of the pump is prevented. Rotary pistons 2 and 3. Their shaft ends 4 and S are mounted on one side in the bearing plate 6 because of the high speed of such machines 45 and wear and the associated load on the lubricating groove nor the synchronous gears 7 and 8. The oil-filled tel is It is important that this before the admixture of the gear housing is through the tub-like ceiling! Foreign substances are protected. 9 formed. The shaft end 4 penetrates the cover 9 to prevent the penetration of foreign substances, in particular to accommodate a drive coupling (not shown), of condensates, from the housing cavity or so on the other hand, the shaft ends 10 and suction chamber in the gearbox and the bearing housing to 11 in the end shield 12 stored in the housing closure, the oil supply for the right shafts is in the bearing shields between the kel 13 and the rolling bearings are kept for the passage into the pump chamber.

Oil seals attached These bring the after- F i g. 2 shows part of the rotary piston 2. of the Welteil with it that they wear out very quickly and a ss lenendes 10 and the wall of the end shield 12. The require high technical effort. One is therefore sealing rings 14 sit in a socket IS and seal went over to this, the shaft bushings with against the bore of the end shield 12 from. The non-contact Equip labyrinth seals. The white bush 16 protrudes into the annular groove 17 of the rotary piston 2 Although they have a repellent effect, they are not included and are provided with a deflecting edge 18. Here absolutely tight. Especially when venting the vacuum 50 through and through the conical outer wall 15 'of the ring pumps arise between the two sides of this groove 17, an annular chamber is formed in the Seals pressure differences, which try to compensate for the running down on the wall of the end shield 12, whereby liquids are entrained can collect de condensate without the possibility of has the ability to get to the sealing rings 14. If in US-PS 34 01 868 a Roots pump 65 rotate the rotary lobes, the condensate is through the described in which for the interception of the oil between centrifugal force over the incline of the annular groove to the outside see the gear housing and the pump chamber of the forced and can so, even with a larger condensation pump a splash ring on the shaft and a return flow, do not get to the sealing rings and