CN203685611U - Single-stage high-speed centrifugal compressor capable of achieving serial development - Google Patents
Single-stage high-speed centrifugal compressor capable of achieving serial development Download PDFInfo
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- CN203685611U CN203685611U CN201420023708.4U CN201420023708U CN203685611U CN 203685611 U CN203685611 U CN 203685611U CN 201420023708 U CN201420023708 U CN 201420023708U CN 203685611 U CN203685611 U CN 203685611U
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Abstract
The utility model discloses a single-stage high-speed centrifugal compressor capable of achieving serial development. The single-stage high-speed centrifugal compressor is composed of a centrifugal compressor body, a gearbox, a motor and other auxiliary devices, wherein the centrifugal compressor body, the gearbox, the motor and the other auxiliary devices are fixedly connected together. Due to the fact that the rotating speed, the adjustable inlet guide blade installation angle and the adjustable radial blade diffuser installation angle of the centrifugal compressor are adjusted together, different pressure ratios are achieved through one centrifugal compressor, series development of the centrifugal compressor can be achieved, and it is ensured that the centrifugal compressor has higher efficiency within the wider working condition range.
Description
Technical field
The utility model relates to a kind of single-stage high-speed centrifugal compressor that can realize seriation development, belongs to Compressor Technology field.
Background technique
At present, centrifugal compressor is widely used in the industrial fields such as petrochemical industry, metallurgy, electric power, weaving, electric power, military project.The traditional low speed multiple-stage centrifugal fan also using in operation at present exists the defects such as volume is large, quality heavy, Flow Adjusting Performance is poor, efficiency is low, energy consumption is large, maintenance is inconvenient.Along with the application of three-dimensional flow theory in centrifugal compressor design, single-stage high-speed centrifugal compressor has progressively replaced low speed multistage centrifugal compressor, it has that volume is little, lightweight, efficiency is high, energy saving, property regulation are in extensive range and automatization level high, in industrial field, is with a wide range of applications.
The most important feature of single-stage high-speed centrifugal compressor is that efficiency is high and property regulation scope is wide.Conventionally in the case of the invariablenes turning speed of single-stage high-speed centrifugal compressor and specified pressure ratio constant, flow adjustment range can reach 45%～100%, ensures under most of operating mode, to have higher efficiency simultaneously.Ge great blower production firm all adopts the mode of variable-geometry to carry out Flow-rate adjustment both at home and abroad at present, mainly comprises variable inlet guide vane, adjustable Diffuser and exit butterfly valve adjusting etc.But there is following problem in this regulative mode that becomes how much: 1. cannot, in the situation that ensureing that range of flow is constant, significantly change the pressure ratio of centrifugal compressor, realize easily the seriation development of different pressure ratio products; 2. flow adjustment range is little, is difficult to ensure that compressor all has higher efficiency under different operating conditionss.Therefore, need badly and seek a kind of method that fast realizes centrifugal compressor seriation development, reach the dual purpose that reduces centrifugal compressor cost of production and improve efficiency under the full operating mode of centrifugal compressor.
Model utility content
The purpose of this utility model is to provide a kind of single-stage high-speed centrifugal compressor that can realize seriation development that can overcome above-mentioned technical problem, the utility model is the single-stage high-speed centrifugal compressor that a kind of wide operating range and the convenient seriation of energy will be provided, the shortcoming that existing centrifugal compressor cannot cover larger pressure ratio scope can be solved, the seriation of different pressure ratio centrifugal compressors can also be realized simultaneously.
A kind of single-stage high-speed centrifugal compressor that can realize seriation development of the present utility model, its key is by the variable inlet guide vane established angle of centrifugal compressor rotating speed, centrifugal compressor and adjustable radial vane diffuser established angle three uniting and adjustment, realize different pressure ratios with separate unit centrifugal compressor, can realize the seriation development of centrifugal compressor by these three's uniting and adjustment, ensure that centrifugal compressor has higher efficiency in wider condition range simultaneously.
A kind of single-stage high-speed centrifugal compressor that can realize seriation development of the present utility model is made up of the centrifugal compressor body being fixed together, speedup box, motor and other supplementary equipment, and described centrifugal compressor body is made up of the variable inlet guide vane that can rotate around the shaft, centrifugal impeller, adjustable radial vane diffuser, the spiral case that can rotate around the shaft.
The described variable inlet guide vane that can rotate is around the shaft arranged on the import of described single-stage high-speed centrifugal compressor; The centrifugal impeller of described single-stage high-speed centrifugal compressor adopts half-opened impeller or double shrouded wheel; The described adjustable radial vane diffuser that can rotate is around the shaft arranged on the centrifugal impeller outlet of described single-stage high-speed centrifugal compressor; Described motor is the variable-frequency motor that can realize different rotating speeds.
The variable inlet guide vane established angle of the utility model by centrifugal compressor rotating speed, centrifugal compressor and these three's uniting and adjustment of adjustable radial vane diffuser established angle can realize the seriation development of centrifugal compressor, ensure to have higher efficiency simultaneously and realize energy-conservation in the whole condition range of centrifugal compressor.The utility model has the advantages that: 1. with respect to other products, in identical range of flow, the utility model can make centrifugal compressor operate in different pressure ratio levels; Solve existing centrifugal compressor and cannot cover larger pressure ratio scope and off-design efficiency problem on the low side, utilized single machine to realize different pressure ratios.2. only by centrifugal compressor motor variable-frequency speed-regulating, variable inlet guide vane and adjustable radial vane diffuser, in the seriation development that keeps can realizing under the prerequisite that centrifugal compressor body is constant centrifugal compressor, greatly shorten the R&D cycle of centrifugal compressor, reduced research and development and manufacture cost; 3. by variable inlet guide vane and the uniting and adjustment of adjustable radial vane diffuser, effectively increased centrifugal compressor flow adjustment range, ensured that under most of operating mode, centrifugal compressor has higher efficiency simultaneously; Therefore, the utlity model has stronger use value and realistic meaning.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of a kind of single-stage high-speed centrifugal compressor that can realize seriation development described in the utility model;
Fig. 2 is the variable inlet guide vane structural representation of a kind of single-stage high-speed centrifugal compressor that can realize seriation development described in the utility model;
Fig. 3 is the adjustable radial vane diffuser structural representation of a kind of single-stage high-speed centrifugal compressor that can realize seriation development described in the utility model;
When Fig. 4 is a kind of single-stage high-speed centrifugal compressor charge flow rate variation that can realize seriation development described in the utility model, centrifugal impeller is imported and exported air velocity vector figure;
When Fig. 5 is a kind of single-stage high-speed centrifugal compressor pressure ratio variation that can realize seriation development described in the utility model, centrifugal impeller is imported and exported air velocity vector figure.
In Fig. 1: variable inlet guide vane 1; Variable inlet guide vane running shaft 2; Centrifugal impeller 3; Adjustable radial vane diffuser running shaft 4; Spiral case 5; Adjustable radial vane diffuser 6; Cantilevered axle 7; Speedup box 8; Motor 9;
In Fig. 4: centrifugal impeller inlet air flow absolute velocity C1; Centrifugal impeller inlet air flow relative velocity W1; Centrifugal impeller import peripheral velocity U1; Centrifugal impeller exit flow absolute velocity C2; Centrifugal impeller exit flow relative velocity W2; Centrifugal impeller outlet peripheral velocity U2; Filled arrows is large flow rate working conditions, and hollow arrow is low flow rate condition;
In Fig. 5: centrifugal impeller inlet air flow absolute velocity C1; Centrifugal impeller inlet air flow relative velocity W1; Centrifugal impeller import peripheral velocity U1; Centrifugal impeller exit flow absolute velocity C2; Centrifugal impeller exit flow relative velocity W2; Centrifugal impeller outlet peripheral velocity U2; Filled arrows is low-pressure ratio operating mode, and hollow arrow is high pressure ratio operating mode.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, following examples are to explanation of the present utility model and the utility model is not limited to following examples.
As shown in Figure 1, variable inlet guide vane 1 is connected on housing by variable inlet guide vane running shaft 2, can be around variable inlet guide vane running shaft 2 positive and negative rotations, and its positive and negative direction defines as shown in Figure 2.The mode that centrifugal impeller 3 coordinates by interference fit or Axis Tripod is arranged in cantilevered axle 7.Centrifugal impeller 3 can be around cantilevered axle 7 High Rotation Speeds.Adjustable radial vane diffuser 6 is equipped with in centrifugal impeller 3 outlets, is connected on housing by adjustable radial vane diffuser running shaft 4, can be around the 4 positive and negative direction rotations of adjustable radial vane diffuser running shaft, and its positive and negative direction defines as shown in Figure 3.Other one end of cantilevered axle 7 is connected with speedup box 8.The other end of speedup box 8 and motor 9 connect.Described motor 9 is for realizing the variable-frequency motor of different rotating speeds.
According to Euler formula, centrifugal impeller 3 passes to the energy of unit mass gas and can be determined by following formula (1) while rotation.The energy that gas obtains is higher, and the pressure ratio that can reach is just higher.In formula, C1u, C2u are respectively impeller and import and export the component of air-flow absolute velocity in peripheral velocity direction, as shown in Figure 4.When in actual moving process, flow reduces, the mode regulating by variable-geometry is by adjusting the established angle of variable inlet guide vane 1, change the direction of the absolute air flow speed C1 of centrifugal impeller 3 imports, thereby ensure that centrifugal impeller 3 import relative velocity W1 are still along blades flows.Because flow reduces, the C2u that centrifugal impeller 3 exports has certain increase.Due to C1u, C2u time, increase, can show that by formula (1) air-flow obtains energy and substantially remains unchanged.In addition, centrifugal impeller 3 exports absolute air flow speed C2 direction and changes, and the setting angle of adjustable radial vane diffuser 6 also needs suitable adjustment, to adapt to the direction of incoming flow, ensures to operate in high-efficiency point.So far, realized in the situation that ensureing that pressure ratio is constant, changed flow and ensure that machine operates in efficient district simultaneously.But can find out that traditional method, owing to there is no motor 9, cannot significantly promote pressure ratio, can not realize easily the seriation development of different pressure ratio products.According to formula (1), utilize motor 9 to improve centrifugal impeller 3 rotating speeds and can significantly improve pressure ratio.After centrifugal compressor pressure ratio promotes, by regulating variable inlet guide vane 1 and adjustable radial vane diffuser 6 can realize flow adjustment.Therefore, by centrifugal compressor rotating speed, variable inlet guide vane established angle and adjustable radial vane diffuser established angle three uniting and adjustment, just can realize different pressure ratios with separate unit centrifugal compressor, ensure that centrifugal compressor has higher efficiency in wider condition range simultaneously.
W=C2uU2-C1uU1 formula (1)
Basic functional principle of the present utility model is: centrifugal impeller 3 High Rotation Speeds, and at centrifugal impeller, 3 inlets form low pressure area, and its pressure is lower than external pressure.Under the driving of pressure reduction, gas is inhaled into centrifugal impeller 3 after changing flow angle by variable inlet guide vane 1.Conventionally the aperture of variable inlet guide vane 1 is positive-angle, and air-flow is by producing and just prewhirl after variable inlet guide vane 1.As shown in Figure 5, while variation according to the pressure ratio of centrifugal impeller 3, import and export air velocity vector map analysis known, under same flow, just prewhirling and be conducive to reduce the relative Mach number of centrifugal impeller 3 inlet's blade tips, improve the efficiency of centrifugal impeller 3.The in the situation that of high pressure ratio, effect is particularly evident.In addition, for the gas that contains steam, inlet whirl is conducive to remove the drop in gas, prevents that drop from entering centrifugal impeller 3 and causing structural destruction.Centrifugal impeller 3 High Rotation Speeds do work to low-pressure gas.Under the effect of centrifugal force, High Temperature High Pressure gas is at a high speed discharged by centrifugal impeller 3, enters adjustable radial vane diffuser 6 supercharging of slowing down, and is further pressure energy by the kinetic transformation of air-flow, and the gas of high pressure low speed flows into spiral case 5 and discharges subsequently.Motor 9 drives centrifugal impeller 3 to compress gas by speedup box 8.In the time that user need to promote pressure ratio but ensure that again flow is substantially constant.Now change rotating speed by motor 9, promote the rotating speed of centrifugal impeller 3.Rotating speed increase causes pressure and flow that centrifugal impeller 3 exports all can rise.For keeping the pressure constant flow that reduces, need to reduce the aperture of variable inlet guide vane 1 simultaneously, make its angle be larger on the occasion of, form and just prewhirling and reduce flow.Now, because rotating speed increases, cause centrifugal impeller 3 to export absolute air flow velocity attitude and change, as shown in Figure 4.The air-flow angle that centrifugal impeller 3 exports no longer with the angle automatching of adjustable radial vane diffuser 6, cause inlet incidence angle to increase.Now need to adjust the angle of adjustable radial vane diffuser 6, make it reach optimum angle of attack, ensure operating range and the efficiency of centrifugal compressor.
The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the utility model scope of disclosure; the variation that can expect easily or replacement, all should be encompassed in the protection domain of the utility model claim.
Claims (4)
1. can realize the single-stage high-speed centrifugal compressor of seriation development for one kind, it is characterized in that, comprise: the centrifugal compressor body, speedup box, the motor that are fixed together, described centrifugal compressor body is made up of the variable inlet guide vane that can rotate around the shaft, centrifugal impeller, adjustable radial vane diffuser, the spiral case that can rotate around the shaft;
The described variable inlet guide vane that can rotate is around the shaft arranged on the import of described single-stage high-speed centrifugal compressor; The described adjustable radial vane diffuser that can rotate is around the shaft arranged on the centrifugal impeller outlet of described single-stage high-speed centrifugal compressor.
2. a kind of single-stage high-speed centrifugal compressor that can realize seriation development according to claim 1, is characterized in that, described motor is the variable-frequency motor that can realize different rotating speeds.
3. a kind of single-stage high-speed centrifugal compressor that can realize seriation development according to claim 1, is characterized in that, the centrifugal impeller of described single-stage high-speed centrifugal compressor adopts half-opened impeller.
4. a kind of single-stage high-speed centrifugal compressor that can realize seriation development according to claim 1, is characterized in that, the centrifugal impeller of described single-stage high-speed centrifugal compressor adopts double shrouded wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420023708.4U CN203685611U (en) | 2014-01-15 | 2014-01-15 | Single-stage high-speed centrifugal compressor capable of achieving serial development |
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| CN201420023708.4U CN203685611U (en) | 2014-01-15 | 2014-01-15 | Single-stage high-speed centrifugal compressor capable of achieving serial development |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775353A (en) * | 2014-01-15 | 2014-05-07 | 势加透博（北京）科技有限公司 | Single-stage high-speed centrifugal compressor capable of realizing series development and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775353A (en) * | 2014-01-15 | 2014-05-07 | 势加透博（北京）科技有限公司 | Single-stage high-speed centrifugal compressor capable of realizing series development and method |
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Granted publication date: 20140702 |