JPH06501292A - Improvement of geo rotor pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] gerotor pump The present invention is based on a rotor having n lobes with male lobes as is well known. and a rotor with n+1 lobes in which the male rotor is positioned and engaged. The hollow female rotor relates to a gerotor pump that includes a ring. Both parts are contained inside the pump body.

This creates a series of chambers between the two rotors, which When rotating around an axis.

The volume of the chamber changes between a minimum and a large volume on the inlet side, thus directing the fluid into the chamber through the inlet hole. The opposite is done on the 8th port side, thus pumping the fluid through the outlet hole. extrude from the pool.

One of the considerations in pump design is to avoid any loss in pump efficiency. The aim of the present invention is the leakage of fluid from the high pressure chamber through the working gap of the pump which leads to The aim is to provide improvements in this area.

According to the invention, the female rotor (ring) is cup-shaped and the male rotor is completely located inside the cup. This means that at one axial end of the chamber at the base of the cup, This can substantially reduce leakage. This is because the fluid has a journaled ring. the end across one of the axial end faces of the annulus to reach the void in the pump body that is This is because it cannot flow quickly.

Various embodiments of the invention are described in more detail in the accompanying drawings. put it here: FIG. 1 is an elevation view of the first embodiment.

FIG. 2 is a similar drawing of a second embodiment.

Figure 3 is a sectional view taken along line X-X in Figure 2 or Figure 3 to show a typical arrangement. be.

Referring to FIGS. 1 and 3, the exact number of gerotor pumps is not disclosed in the present invention. Although not critical, in the embodiment illustrated here there are six lobes. It includes a rotor 10 with male lobes.

The rotor is essentially a ring 12 with one (ethically more than one) extra lobe. be accepted into the This results in a rotor as shown as 14 in FIG. A series of defined working chambers are created between the lobes of the ring and the lobes of the ring.

In the rotation of the parts, the rotor rotates around @16 and the ring rotates around axis 18 rotates, and the drive is transmitted to one of these parts by the other among them. And the rotation is done at different speeds. As a result, the work chamber rotates around an axis or As the chamber moves forward, it changes its volume from minimum to maximum as the chamber passes through the inlet hole and as the chamber exits. When passing through the mouth hole, the volume changes from maximum to minimum.

Each chamber extends axially. That is, the lobes meshed in the position shown in Figure 1. It extends along its axial length.

The pump body 20 shown in FIG. 1 is generally cylindrical with inlet and outlet passages 22,24. a cavity having an end wall 26 in the form and on which parts 10 and 12 sit; There is. This end wall is located between the working chamber and the inlet and outlet passages 22, 24 at 28 and 30. A hole is drilled to allow communication between the two.

In accordance with the present invention, ring 12 also has a base wall 36 that is generally flat and parallel to wall 26. It is made as a cup-shaped element. Therefore rotor 10 with male lobes is perfectly acceptable in that cup.

In this particular embodiment of the invention the ring is driven by a drive means 38 which is a protrusion. and the drive means are integrated with the ring 12.36 or a drive hand for drive transmission. There may also be a swivel 40 engaged between the step 38 and the ring.

Possible leakage paths in the pump include the annulus and the end of the rotor adjacent to the flat wall 26. across the surface of the surface, which is generally oriented radially outward, e.g. centrifugal force However, the 8 force effectively leads to a reduction in pressure. normal pump smell The path of such leakage is the gerotor set, i.e. the interlocking parts 1o and 12. Exists at each axis end. However, by making the ring into a cup shape to completely accommodate the rotor, the cup By eliminating holes in the base of the It will be done. As a result, leakage inside the pump is considerably reduced.

The ring is held in position by a retaining ring 56 attached to the body of the pump around the drive means. kept in the correct position.

Figures 2 and 3 show an inlet and outlet passageway, here designated by figure number 40.42. There is the same arrangement of rotor and annulus, giving a working chamber for tying. The pump in Figure 2 is driven It differs from the one in Figure 1 in that it has a driven rotor instead of a driven ring; This is supported by a journal in the body 46, for example with an interference fit with the rotor 10. This is achieved by a drive shaft 44 fixed to the rotor 10. The end of the shaft 44 is between It is spaced from the base 36 of the annulus by a gap 48.

The ring is axially mounted within the body 46 as illustrated in the lower half of FIG. 50 and a circlip 52. As an alternative, a more massive retaining phosphor The gerotor set 54 is a cylindrical cavity that receives the gerotor set as a tight fit therein. It is pressed into the cavity and is used to hold the part in the desired axial position. but The same reduced availability and increased efficiency obtained from the format in Figure 2 as in the format in Figure 1 are obtained from the format in Figure 2. It will be done.

(Insertion method 11s4iΦ8) November 19, 1992

Claims (5)

[Claims] 1. A rotor with a male rope having n ropes and a male rotor inside it. A rotor with a female rope having n+1 ropes positioned and interlocked at Gelow, both parts are contained within a cylindrical cavity within the pump body. In the tarpump, The female rotor or ring is cup-shaped and completely covers the male rotor to reduce leakage. A georotor pump characterized by comprising: 2. In the pump as claimed in claim 1, the ring is driven and the drive is lowered. A georotor pump that is characterized by transmitting power to the rotor. 3. The pump as claimed in claim 1, wherein the rotor is driven and A georotor pump characterized by transmitting the energy to the ring. 4. In the pump claimed in any one of claims 1 to 3, the ring is a retaining ring. A georotarpon characterized by being fixed in position in the cavity of the main body by P. 5. 1 and 3 or 2 and 3 of the accompanying drawings; pump.