CN1125822A - Vane pump - Google Patents

Abstract

The vane pump for the substance that has very low flowabilit and is easily damaged is composed of casing, circular cylinder rotary in casing and eccentric rotor in circular cylinder. The outer end of rotor vane is close to inner wall of cylinder. When rotor rotates, the cylinder rotates too in same diffection, so eliminating the friction between outer end of vane and inner wall of cylinder.

Description

Vane pump

The present invention relates to a kind of vane pump, it is used under pressure perfusion has very lazy flow and does not think ruined material.

The vane pump of prior art comprises that a shell, one are contained in cylinder in the shell, one and are contained in the rotor on the cylinder, a plurality of being installed on the rotor so that the blade that can radially move prejudicially.During rotor rotation, slide along the inwall of cylinder in the end of blade.Because along the Volume Changes of the inwall of cylinder, the pump chamber that limited between adjacent blades, fluid sucks and discharges to exhaust port from the suction port that forms at shell and cylinder.

In this vane pump, during blade rotation, slide on the inwall of fixing cylinder in their end.Can wear and tear in the end of blade, pumpable material is damaged in the interior perimeter surface of cylinder and the slide part office between the blade tip sometimes.Therefore, this vane pump can not be used under pressure perfusion and not wish ruined material such as cream, jam, beans sauce and laver etc.

The purpose of this invention is to provide a kind of vane pump, it can be used to irritate Wang under pressure has low flowability and does not wish ruined material.

According to the present invention, this vane pump comprises a shell that has suction port and exhaust port; A cylinder that is contained in the described shell and has the through hole of placing at a plurality of angled intervals; One prejudicially and be rotatably installed in rotor in the described cylinder, and a plurality of being installed on the described rotor so that the blade that can radially move, it is characterized in that described cylinder rotates along same direction together with described rotor, the outer end of described blade is close on the inwall of described cylinder.

When rotor rotation, pumpable material transmits under owing to the pressure that the Volume Changes between adjacent blades produces in pump chamber.In this case, cylinder can rotate with rotor, and the outer end of blade is owing to centrifugal force abuts against on the cylinder at this moment.Owing between blade and cylinder, do not produce slip, therefore can eliminate the wearing and tearing of blade tip.Like this, the material between blade and cylinder inner wall will can not destroy.

Below, from the detailed description of reference accompanying drawing, other characteristics of the present invention and purpose will become more obvious.

Fig. 1 is the vertical positive view according to vane pump of the present invention; And

Fig. 2 is the vertical side sectional view according to vane pump of the present invention.

Embodiments of the invention are described below with reference to accompanying drawings.

As shown in the figure, shell 1 is arranged on the both sides of vane pump, and suction port 2 and exhaust port 3 are arranged on it.Rotor 4 and cylinder 5 are housed in the shell 1.

One of the annular slab 6 of cylinder 5 from be contained in shell 1 is stretched out.Keep tube 7 to stretch out, and be rotatably installed in the shell 1 by the bearing 8 of any kind from the other end of annular slab 6.Like this, cylinder 5 just can rotate in shell 1.

Cylinder 5 has a plurality of through holes 9, and these through holes are along the circumferential direction placed equably at interval.When cylinder 5 rotated, through hole 9 was communicated with suction port 2 and exhaust port 3 one by one.

Rotor 4 is fixed on the end of input shaft 10, and this input shaft is arranged in the shell 1 prejudicially with respect to cylinder 5.The outer surface of rotor 4 contacts with the inwall of cylinder 5 partly, and this contact position is between suction port 2 and exhaust port 3, and between two adjacent through holes 9.Like this, when rotor 4 rotates, keep the off-centre of itself and cylinder 5 always.

As shown in Figure 2, the front end of shell 1 is sealed by protecgulum 11.The front end of cylinder 5 contacts with the airtight pane 12 that is arranged on protecgulum 11 inboards.Rotor 4 is contained between annular slab 6 and the airtight pane 12, so that do eccentric rotation with respect to cylinder 5.

A plurality of radial slit 13 are arranged, its being predetermined at interval along the circumferential direction on rotor 4.In each slit 13, be inserted with a blade 14, so that make the radial motion of blade along rotor 4.

Each blade 14 has certain height, and its outer end is contacted with the inwall of cylinder 5, and its inner ring 15 interior with being arranged on rotor 4 contacts, so that concentric with cylinder 5.Equally, the two ends of blade 14 also respectively with the end face sliding contact of the end face and the airtight pane 12 of annular slab 6.Blade 14 rotates with rotor 4.

As shown in Figure 1, have at least the outer end of a blade 14a to be embedded in the groove 16 that forms on the inwall of cylinder 5.Like this, when rotor 4 rotated, cylinder 5 rotated with rotor by blade 14a.

Under groove 16 was located at condition in the inwall of the cylinder 5 between the adjacent through hole 9, the outer end of each blade 14 abutted in cylinder 5 all the time on the inwall between the through hole 9.As shown in Figure 1, the pump chamber 17 that is limited between the adjacent blades 14 communicates with corresponding through hole 9.

As shown in Figure 2,, can an internal gear 18 be set, fix a gear 19, thereby the part of gear 19 is meshed with internal gear 18 in the hub portion of rotor 4 at the inwall that keeps tube as the device that rotor 4 and cylinder 5 are rotated together along same direction.Like this, the rotation of rotor 4 can be delivered on the cylinder 5 by the engagement of gear 18 and gear 19.

In operation, when the input shaft 10 that connects with motor rotated rotor 4, because centrifugal action, the outer end of blade 14 was near the inwall of cylinder 5.In addition, cylinder 5 rotates along same direction together together with rotor 4.

Because rotor 4 is with respect to cylinder 5 eccentric rotary, therefore when cylinder 5 rotations, between adjacent blades 14, and the volume of the pump chamber 17 that limits between the periphery of the inwall of cylinder 5 and rotor 4 will change with the rotation of cylinder 5.When each pump chamber 17 is connected with suction port 2 by through hole 9, will suck pumpable material from suction port 2.When each pump chamber is connected with exhaust port 3 by through hole 9, described material will be discharged from.

Because rotor 4 and cylinder 5 rotate together along same direction, the end of blade 14 abuts in the same position on cylinder 5 inwalls always, thereby does not produce mutual slip between them.Therefore, can under pressure, pour into material, and can not damage at this position.

Like this, having the easy again ruined any material of very low flowability such as cream, jam, beans sauce etc. can transmit under pressure.In addition, on the inwall of the outer end of blade 14 and cylinder 5, can not wear and tear yet.

Claims (1)

1. a vane pump comprises a shell that has suction port and exhaust port; A cylinder that is contained in the described shell and has the through hole of placing at a plurality of angled intervals; One prejudicially and be rotatably installed in rotor in the described cylinder, and a plurality of being installed on the described rotor so that the blade that can radially move, it is characterized in that described cylinder rotates along same direction together with described rotor, the outer end of described blade is close on the inwall of described cylinder.

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