CN201539442U

CN201539442U - Pump cover of large-flow air circulating pump

Info

Publication number: CN201539442U
Application number: CN2009202690468U
Authority: CN
Inventors: 陈建伟
Original assignee: ZHEJIANG GREENCO INDUSTRY Co Ltd
Current assignee: ZHEJIANG GREENCO INDUSTRY Co Ltd
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2010-08-04
Anticipated expiration: 2019-11-20

Abstract

The utility model provides a pump cover of a large-flow air circulating pump, which solves the technical problems of the existing pump cover that as the depth and width at all parts of air flow passages of pump cover are both same, namely, the sectional areas of all parts on the air flow passages are the same, pressure in discharge is low, and the vacuum degree is low and the like. The pump cover of the large-flow air circulating pump is in disk shape and used for connecting a groove which is arranged at the center of the inner end face of the pump body and used for axially fixing the motor shaft end, the periphery of the inner end face is provided with an air flow passage which is in opening ring shape and concave towards the direction of the outer end face, and two ends of the air flow passage are respectively an air inlet and an air outlet; and the pump cover is characterized in that: the depth concaving towards the direction of the outer end face on the air flow passage becomes narrower from the air inlet to the air outlet. For the pump cover, under the condition that the air inhaling amount is fixed, when the temperature is not changed, according to the condition that the pressure of the air and the volume of the air form inverse ratio, as the depth of the air outlet becomes narrower, and the volume becomes smaller, the pressure of discharged air is increased, and the vacuum degree is high.

Description

The pump cover of large-flow gas ring pump

Technical field

The utility model relates to a kind of compression ring pump, particularly relates to a kind of pump cover of compression ring pump, belongs to the pump field.

Background technique

The compression ring pump is the equipment of the jet-propelled principle of a kind of momentum, also be referred to as crosswind road blower fan, vortex type air pump, regenerative pump, ring drums blower fan or gas ring type compressor etc., it can use as vacuum pump separately, also can be separately use every field such as pneumatic transport system, vacuum lifting and clamping system, wrapping machine, Sewage Plant are ventilated, packed/bottled/bulking system, soil conditioning, foam-formed system that it is widely used in as blower.

With single-stage compression ring pump is example, single-stage compression ring pump is mainly by the pump housing, pump cover and constitute by the impeller of driven by motor, enclosed annular gas runner of the common formation of the inwall of the pump housing and pump cover, impeller is installed in this gas flow, and has an intakeport and a relief opening that is used to be connected outlet pipe that is used to connect sucking pipe on the end face of the pump housing, ambient atmos arrives in the gas flow through intakeport from sucking pipe, rotary blade is given the speed of gas that enters on sense of rotation, centrifugal force on the blade outwards quickens and boost pressure gas simultaneously, impels gas to discharge through outlet pipe from the relief opening of the pump housing.

Has open annular gas runner respectively on the end face of the pump cover and the pump housing, promptly form enclosed annular gas runner after both corresponding end-faces is tightly connected, be illustrated in figure 2 as existing pump cover 1 ', everywhere depth B of the gas flow 1b ' of pump cover ' and width C ' all be the same, be that everywhere sectional area is identical on the gas flow, cause the air pressure when discharging little like this, degree of vacuum is low.In addition, in order to alleviate the weight of pump cover, so during fabrication, make that the wall thickness of gas flow is thinner, but because the outer surface of formation gas flow is the surface of protruding most on the pump cover, after its wall thickness attenuation, can reduce mechanical strength greatly, when particularly the compression ring pump vertically being placed, the outer surface of corresponding gas flow is out of shape because of supporting fragility on the pump cover, cause air-flow to have some setbacks, noise is big.

Summary of the invention

The utility model provides a kind of and has had the pump cover that different sectional areas improves the large-flow gas ring pump of gas head pressure everywhere by the gas flow that makes pump cover.

The purpose of this utility model can realize by following technical proposal: the pump cover of large-flow gas ring pump, be disc, its interior edge face center that is used to connect the pump housing is shaped on the groove that is used for the axial restraint motor shaft end, the perimembranous of interior edge face is provided with ring-type and the recessed gas flow of outside end face direction that is opening, the two ends of gas flow are respectively suction port and air outlet, it is characterized in that the degree of depth that outside end face direction is recessed on the described gas flow is gradually shallow to the air outlet direction by suction port.

The pump cover of the utility model large-flow gas ring pump, an end that connects the pump housing on the pump cover is an interior edge face, the center of interior edge face is shaped on groove, the output axle head of motor by bearing fixing in this groove, the perimembranous of interior edge face has the annular gas runner that is opening, after entering the gas process impeller rotation pressurization of gas flow suction port, gas flow wall along annular transition, locate up to the air outlet, discharge through the outlet pipe that communicates with the relief opening of the pump housing at last, because the degree of depth that outside end face is recessed on the gas flow is gradually shallow to the air outlet direction by suction port, be that suction port is dark, the air outlet is shallow, according to the Bo Yier law, PV=constant (volume V, pressure P), promptly under the certain situation of gettering quantity, when temperature-resistant, the pressure of gas and the volume of gas are inversely proportional to, the degree of depth of air outlet shoals and makes the gas volume at air outlet place diminish, and its pressure of discharging gas will increase so, is applicable to that suction pressure is lower than-working condition of 0.06MPa, suction can reach-and more than the 450mmHg, the working vacuum scope is 0～0.05MPa.

In the pump cover of above-mentioned large-flow gas ring pump, the degree of depth of described suction port is 1.4 times～2 times of the degree of depth of air outlet.Can choose different depth scales according to actual suction pressure.

In the pump cover of above-mentioned large-flow gas ring pump, the sectional shape of described gas flow is the U font of round-corner transition.Make the inwall rounding off everywhere of gas flow, help reducing the pressure loss of gas, reduce noise.

In the pump cover of above-mentioned large-flow gas ring pump, the exterior edge face of described pump cover is provided with the supporting frame of making one with it, and the supporting surface of this supporting frame is positioned at the outermost end of pump cover.When vertical placement pump cover, the supporting surface of supporting frame contacts with placed mesa, and avoids the outer surface of corresponding gas flow on the pump cover directly to contact with placed mesa, can prevent the gas flow distortion, guarantees airflow smooth, and noise is little.

In the pump cover of above-mentioned large-flow gas ring pump, described supporting frame is the cylindrical shape dunnage concentric with pump cover.Form a straight supporting surface by the cylindrical shape dunnage, make barycentre steadiness, can avoid causing that the exterior edge face of pump cover is deep mixed causedly vertically puts jiggly situation and take place because of the gas flow degree of depth everywhere is different.

In the pump cover of above-mentioned large-flow gas ring pump, blocking-up place corresponding to suction port and air outlet on the exterior edge face of described pump cover is fixed with stiffener.Concentrate for fear of stress, generally make pump cover wall thickness everywhere even, therefore the part of corresponding gas flow is the ring-type of outwards protruding gradually on the exterior edge face of pump cover, the two ends of annular convex (being corresponding to the blocking-up place two ends of suction port and air outlet on the exterior edge face of pump cover) are protruded distance and are differed bigger, and the mechanical strength at protruding place is relatively poor, after between the two ends of protuberance stiffener being set, can increase its mechanical strength greatly.

Compared with prior art, the pump cover of this large-flow gas ring pump has the following advantages:

1, the degree of depth of gas flow is gradually shallow to the air outlet direction by suction port on this pump cover, make under the certain situation of gettering quantity, when temperature-resistant, be inversely proportional to according to the pressure of gas and the volume of gas, because of the degree of depth of air outlet shoals, and make its smaller volume, its pressure of discharging gas will increase so, the degree of vacuum height, the pumping speed scope is wide;

2, the outer side surface of this pump cover also is provided with the supporting frame of making one with it, and the supporting surface of supporting frame is positioned at the outermost end of pump cover, not only can increase the intensity of pump cover, and utilize supporting frame to support pump cover, pump cover is put steadily, can also avoid the gas flow distortion, guarantee airflow smooth, noise is little.

Description of drawings

Fig. 1 is the sectional structure schematic representation of the pump cover of the utility model large-flow gas ring pump;

Fig. 2 is the sectional structure schematic representation of existing compression ring pump pump cover;

Fig. 3 is a schematic perspective view of the utility model large-flow gas ring pump pump cover;

Fig. 4 is another schematic perspective view of the utility model large-flow gas ring pump pump cover.

Among the figure, 1 pump cover; The 1a groove; The 1b gas flow; The 1c suction port; The 1d air outlet; The 1e mounting hole; 2 supporting frames; 3 stiffeners; 4 radiating fin; The degree of depth of B gas flow; 1 ' existing pump cover; The gas flow of the existing pump cover of 1b '; B ' existing pump covers the degree of depth of gas flow; C ' existing pump covers the width of gas flow.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

The pump cover of this large-flow gas ring pump, as shown in Figure 3 and Figure 4, be disc, the exterior edge face of pump cover 1 is provided with some radiating fin 4, the interior edge face edge of pump cover 1 is evenly distributed with a plurality of mounting hole 1e by circumference, the interior edge face of the pump housing also has corresponding mounting hole, pass mounting hole on the pump cover 1 and the pump housing simultaneously by screw, adopt the nut check screw again, just the pump cover 1 and the pump housing can be coupled together, the interior edge face center of pump cover 1 is shaped on groove 1a, motor shaft end can be by bearing fixing in this groove 1a, thereby prevent that motor shaft from moving axially, the interior edge face perimembranous of pump cover 1 has ring-type and the recessed gas flow 1b of outside end face direction that is opening, gas flow 1b disconnects at its opening, the one end is suction port 1c, the other end is air outlet 1d, as shown in Figure 1, the recessed depth B of outside end face direction is shoaled to air outlet 1d direction gradually by suction port 1c on the gas flow, when reality is made, the degree of depth of desirable suction port 1c is 1.4 times～2 times of the degree of depth of air outlet 1d, evidence, after adopting such gas flow, can increase the discharge pressure of gas greatly, thereby obtain higher suction, generally can reach-more than the 450mmHg, the working vacuum scope is 0---0.05Mpa is applicable to that suction pressure is lower than-working condition of 0.06MPa.

In order to make airflow smooth pass through gas flow, reduce noise, the sectional shape of gas flow 1b can be made the U font of round-corner transition, also can be made into semicircle certainly.

Concentrate for fear of stress, generally make pump cover wall thickness everywhere even, but so, the gas flow of corresponding interior edge face partly is the ring-type curved surface that outwards protrudes gradually on the exterior edge face of pump cover 1, if the direct supporting surface during as vertical placement pump cover with this ring-type curved surface, it is not steady that pump cover 1 is placed, even topple over, so also a supporting frame 2 of making one with it should be set on the exterior edge face of pump cover 1, as shown in Figure 4, supporting frame 2 is the cylindrical shape dunnage concentric with pump cover 1, and the supporting surface of dunnage is positioned at the outermost end of pump cover 1, when reality is made, the pairing outer surface in bosom (being the suction port place) that should make supporting surface protrude from gas flow 1b slightly is advisable, the concrete structure of supporting frame 2 also has a lot, as square, oval-shaped dunnage also can be independently lattice framings etc. of mutually concordant several of supporting surface; In addition, the distance that outwards protrude at the two ends of the annular convex on the pump cover exterior edge face differs bigger, and the mechanical strength at protruding place is relatively poor, therefore also can be connected by stiffener 3 between the two ends of protuberance, increases its mechanical strength.

Claims

1. the pump cover of large-flow gas ring pump, be disc, its interior edge face center that is used to connect the pump housing is shaped on the groove (1a) that is used for the axial restraint motor shaft end, the perimembranous of interior edge face is provided with ring-type and the recessed gas flow (1b) of outside end face direction that is opening, the two ends of gas flow (1b) are respectively suction port (1c) and air outlet (1d), it is characterized in that it is gradually shallow to air outlet (1d) direction by suction port (1c) that described gas flow (1b) is gone up the recessed degree of depth (B) of outside end face direction.

2. the pump cover of large-flow gas ring pump according to claim 1 is characterized in that, the degree of depth of described suction port (1c) is 1.4 times～2 times of the degree of depth of air outlet (1d).

3. the pump cover of large-flow gas ring pump according to claim 1 is characterized in that, the sectional shape of described gas flow (1b) is the U font of round-corner transition.

4. according to the pump cover of arbitrary described large-flow gas ring pump of claim 1-3, it is characterized in that the exterior edge face of described pump cover (1) is provided with the supporting frame (2) of making one with it, and the supporting surface of this supporting frame (2) is positioned at the outermost end of pump cover.

5. the pump cover of large-flow gas ring pump according to claim 4 is characterized in that, described supporting frame (2) is the cylindrical shape dunnage concentric with pump cover (1).

6. the pump cover of large-flow gas ring pump according to claim 4 is characterized in that, blocking-up place corresponding to suction port (1c) and air outlet (1d) on the exterior edge face of described pump cover (1) is fixed with stiffener (3).