CN215762409U - Novel end suction centrifugal pump mouth ring structure - Google Patents

Abstract

The utility model discloses a novel port ring structure of an end-suction centrifugal pump, which relates to the field of centrifugal pumps. The utility model comprises a fixing screw, a washer, a port ring cover and a port ring; Drive, the output end of the pump shaft penetrates the pump cover and extends into the cavity of the pump body, the output end of the pump shaft is supported on the pump cover, and the end of the output end of the pump shaft is sleeved with an impeller; the pump body is provided with an opening near the mouth of the impeller The ring groove is used for accommodating the mouth ring, the mouth ring is sleeved on the mouth of the impeller, and a floating gap is set between the inner diameter of the mouth ring and the outer diameter of the impeller to form a floating seal between the pump body and the impeller; fixing screws and washers cover the mouth ring It is fixed on the pump body, and the mouth ring cover stops at the upper mouth of the mouth ring groove, so that the mouth ring is positioned between the pump body and the mouth ring cover. The utility model increases the flow resistance of the medium by adding the mouth ring and the mouth ring cover device to form a labyrinth seal between the impeller and the pump casing, which is automatically corrected with the pressure change, so as to reduce the leakage of the medium and improve the pump efficiency.

Description

Novel end suction centrifugal pump mouth ring structure

Technical Field

The utility model relates to the field of centrifugal pumps, in particular to a novel end suction centrifugal pump port ring structure.

Background

The existing end suction centrifugal pump structure in the market is shown in figure 3, the radial clearance between an impeller opening ring and a pump body reaches a single side of 0.2mm, the radial clearance between an impeller (8) and the pump body (5) is large, and fluid pressurized by the pump returns to an inlet from the pump outlet area along the clearance between the impeller and the opening ring, so that the leakage amount is large during the operation of the centrifugal pump, and the service efficiency of the pump is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a novel end suction centrifugal pump port ring structure which has the advantages of long service life, stable and reliable structure and small medium leakage.

The purpose of the utility model is achieved by the following technical scheme: the novel end suction centrifugal pump port ring structure comprises a fixing screw, a gasket, a port ring cover and a port ring; the pump cover is fixedly arranged on the pump body, the input end of the pump shaft is driven by a motor, the output end of the pump shaft penetrates through the pump cover and extends into the inner cavity of the pump body, the output end of the pump shaft is supported on the pump cover, and the end part of the output end of the pump shaft is sleeved with an impeller; an opening ring groove is formed in the position, close to the opening of the impeller, of the pump body and used for containing an opening ring, the opening ring is sleeved on the opening of the impeller, and a floating gap is formed between the inner diameter of the opening ring and the outer diameter of the impeller, so that floating type sealing is formed between the pump body and the impeller; the fixing screw and the washer fix the mouth ring cover on the pump body, and the mouth ring cover is stopped at the upper opening of the mouth ring groove, so that the mouth ring is positioned between the pump body and the mouth ring cover.

As a preferable technical scheme, the floating gap is single-edge 0.05 mm.

As a preferable technical scheme, the gap between the mouth ring cover and the mouth ring is 0.05 mm.

As a preferred technical scheme, the mouth ring is made of 40% glass fiber reinforced PPS.

The utility model has the beneficial effects that:

1. the leakage amount of the medium can be reduced, and the pump efficiency is improved;

2. the failure rate is reduced, and the use stability of the pump is improved;

3. the mouth ring is made of PPS and 40 percent GF, has strong corrosion resistance and is very durable;

4. after the mouth ring is worn, the mouth ring is convenient to replace and simple to install.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of a region a in fig. 1.

Fig. 3 is a schematic structural diagram of the prior art.

Description of reference numerals: the pump comprises a fixing screw 1, a gasket 2, a mouth ring cover 3, a mouth ring 4, a pump body 5, a pump shaft 6, a pump cover 7, an impeller 8 and a mouth ring groove 9.

Detailed Description

The utility model will be described in detail below with reference to the following drawings:

example (b): as shown in the attached drawings 1 and 2, the novel end suction centrifugal pump orifice ring structure comprises a fixing screw 1, a gasket 2, an orifice ring cover 3 and an orifice ring 4; the pump cover 7 is fixedly arranged on the pump body 5, the input end of the pump shaft 6 is driven by a motor, the output end of the pump shaft 6 penetrates through the pump cover 7 and extends into the inner cavity of the pump body 5, the output end of the pump shaft 6 is supported on the pump cover 7, and the end part of the output end of the pump shaft 6 is sleeved with an impeller 8; a mouth ring groove 9 is formed in the position, close to the mouth of the impeller 8, of the pump body 5 and used for containing the mouth ring 4, the mouth ring 4 is sleeved on the mouth of the impeller 8, and a floating gap with a single side of 0.05mm is formed between the inner diameter of the mouth ring 4 and the outer diameter of the impeller 8, so that floating type sealing is formed between the pump body 5 and the impeller 8; the fixing screws 1 (preferably cross-recessed pan head screws) and the washer 2 fix the mouth ring cover 3 on the pump body 5, and the mouth ring cover 3 is stopped at the upper opening of the mouth ring groove 9, so that the mouth ring 4 is positioned between the pump body 5 and the mouth ring cover 3.

Preferably, the gap between the mouth ring cover 3 and the mouth ring 4 is 0.05 mm; the mouth ring 4 is made of 40% glass fiber reinforced PPS.

When the device is installed, the mouth ring 4 is firstly placed into the mouth ring groove 9 on the pump body 5, then the mouth ring cover 3 is covered, the mouth ring cover 3 is fixed by the fixing screw 1 and the gasket 2, and then the impeller 8 is sleeved into the mouth ring 4; because the radial clearance of the mouth ring 4 and the impeller 8 is unilateral 0.05mm, the floatability can make the local bigger clearance of the mouth ring of the floating mouth ring and the impeller become the even little annular clearance, the high-pressure liquid forms a layer of liquid film between annular clearance and mouth ring 4, produce the throttle and step down, prevent the high-pressure medium to reveal to the low pressure, strengthen the resistance that the throttle produced simultaneously, improve sealing performance, reduce the leakage rate of centrifugal pump, improve pump efficiency.

The labyrinth seal which is automatically corrected along with the pressure change is formed between the impeller and the pump shell by adding the opening ring and the opening ring cover device, so that the flow resistance of a medium is increased, the aim of reducing the leakage of the medium is fulfilled, and the pump efficiency is improved. The mouth ring also plays the effect that main parts do not receive wearing and tearing on the protection pump, and after the mouth ring wearing and tearing, can repair or change new unsteady mouth ring, resume normal fit-up gap, so not only economy but also easy to overhaul. The stability of pump use is effectively improved, and radial dimension obtains control, makes impeller and the pump body be convenient for install, and water pump efficiency obtains obviously promoting.

It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.

Claims (4)

1. A novel end-suction centrifugal pump mouth ring structure is characterized in that: comprising a fixing screw (1), a washer (2), a mouth ring cover (3) and a mouth ring (4); the pump cover (7) is fixedly mounted on the On the pump body (5), the input end of the pump shaft (6) is driven by the motor, the output end of the pump shaft (6) penetrates the pump cover (7) and extends into the inner cavity of the pump body (5), and the pump shaft (6) outputs The end is supported on the pump cover (7), and the end of the output end of the pump shaft (6) is sleeved with an impeller (8); the pump body (5) is provided with an opening ring groove (9) near the mouth of the impeller (8). It is used to accommodate the mouth ring (4), the mouth ring (4) is sleeved on the mouth of the impeller (8), and a floating gap is set between the inner diameter of the mouth ring (4) and the outer diameter of the impeller (8), so that the pump body (5) and the A floating seal is formed between the impellers (8); the fixing screw (1) and the washer (2) fix the mouth ring cover (3) on the pump body (5), and the mouth ring cover (3) stops at the mouth ring groove ( 9) Close the mouth so that the mouth ring (4) is positioned between the pump body (5) and the mouth ring cover (3). 2 . The novel end-suction centrifugal pump port ring structure according to claim 1 , wherein the floating gap is 0.05mm on one side. 3 . 3. The novel end-suction centrifugal pump mouth ring structure according to claim 1, wherein the gap between the mouth ring cover (3) and the mouth ring (4) is 0.05mm. 4. The novel end-suction centrifugal pump mouth ring structure according to claim 1, wherein the mouth ring (4) is made of 40% glass fiber reinforced PPS.

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