The relationship between rotor parameters and performance of a high efficiency type supercharger (Lysholm compressor) was studied. It is necessary that. The cost to repair the Lysholm Compressor Oil Seals is estimated at $ and why does it cost so much to repair the oil seals. The present invention relates to compressors of the rotary screw type in which two or more cooperating rotors mounted within a suitable casing operate to.

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With this arrangement, the pocket P remains in communication with the suction space 74 until the front edge a of the thread Ti reaches the position ai, in which position it has just passed the edge e of the end wall As a comprewsor, centrifugal supercharger produces little boost at low to medium rev.

A clear example of the technology applied by the twin-screw in companies like FordMazdaMercedes and Mercury Marine can also demonstrate the effectiveness of the twin screw. As I have mentioned, part of the energy is wasted through mechanical friction. It will also be evident that lywholm pressure relief passage providing communication between pocket P and the desired zone of low pressure need not necessarily be formed by special configuration of-the end member of the casing but may be formed by special configuration of a part of the casing radially enclosing the rotor.

To understand how it improved efficiency, perhaps we should study how a conventional Roots supercharger waste energy first. They are commonly used to replace piston compressors where large volumes of high-pressure air are needed, either for large industrial applications or to operate high-power air tools such as jackhammers and impact wrenches.

Rotary-screw compressor

For further information please do not hesitate to contact us. When they rotate, air is captured between the screws and the housing while being pushed from the inlet towards the outlet. This development led to a supercharger which was compact and lightweight with increased efficiency for operating conditions of pressure and speed. However, when the demand for compressed air is satisfied or reduced, instead of disconnecting power to the compressor, a device known as a slide valve is activated.


To make this possible, it incorporates step-up gears to multiply rev from crankshaft. This largely reduces pumping loss, but the moving mechanicals still consumes power due to friction.

About Lysholm

If the conventional supercharger used the same large inlet as TVS, the Seal would never happen, and the chamber would bridge between the inlet and outlet thus release all the high pressure at the outlet side.

It is usual for some entrained compressor oil to carry over into the compressed-gas stream downstream of the compressor.

Within industry, a HP rotary-screw compressor is generally considered to be a compact piece of equipment. Weak boost at low to medium rev. W e do not wish to diminish the many clever minds and companies that have played a part in development of current rotary screw compressors.

The illustration shows that ylsholm TVS can use considerably larger air inlet because its 4-lobe design reduces the span of Seal phase to 90 degrees vs degrees on the 3-lobe design. Don’t confuse it with inlet for intercooler, this car is not turbocharged!

Lysholm compressor – Oxford Reference

It is more popular in aftermarket. Lysholm quality assurance, assembly techniques and testing have translated well on US highways as documented with a recent application in which a Lysholm Model compressor logged more thanmiles on a GMC Yukon. For these reasons, supercharging is quite well suited to nowadays heavy sedans, espeically lysho,m mated with automatic transmission. Gas enters at the suction side and moves through the threads as the screws rotate.


The Whipple-manufactured male rotor has three lobes, the female five lobes. The oil is separated from the discharge stream, then cooled, filtered and recycled. Among rotary-screw compressors, there are multiple control schemes, each with differing advantages and disadvantages. Therefore we are going to spend an extra section to discuss about it. The bearings are carried by casing parts 28 and which are suitably secured to the ends of the casing part 14 and which provide the end walls for the casing.

Moreover, it does not hamper the revvability of engine. Compresaor the years, OE development engineers have found these maps essential to matching and optimizing supercharger — engine combinations, and obtaining absolute best performance, economy, and durability from their powertrains.

Unlike a turbocharger which has waste gate to keep boost pressure constant at high rev, centrigual supercharger does not have such device.

About | Lysholm

On the downside, its power delivery is extremely peaky. Lastly but not least, it largely eliminates the ugly noise traditionally associated with Roots-type superchargers. Passage 80 terminates in two ports 82 and 84 located as shown in Fig.

Unlike the Roots type superchargerthe twin-screw exhibits internal compression which is the ability of the device to compress air within the housing as it is moved through the device instead of relying upon resistance to flow downstream of the discharge to establish an increase of pressure.

Our experience with the WK82 actually showed this older profile to be very durable.