CN102990302A - Machining method of closed three-elemental impeller with small flow - Google Patents
Machining method of closed three-elemental impeller with small flow Download PDFInfo
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- CN102990302A CN102990302A CN2012105023161A CN201210502316A CN102990302A CN 102990302 A CN102990302 A CN 102990302A CN 2012105023161 A CN2012105023161 A CN 2012105023161A CN 201210502316 A CN201210502316 A CN 201210502316A CN 102990302 A CN102990302 A CN 102990302A
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Abstract
The invention relates to a machining method of a closed three-elemental impeller with a small flow. The machining method comprises the following steps of: 1. mounting an impeller forging on a lathe machining center of a numerically-controlled machine tool, thereby carrying out semi-finishing treatment on the impeller forging; 2. machining a circular groove in an impeller cover and completing the machining of the whole flow channel of an impeller; and 3. welding a circular impeller cover shielding plate on the impeller cover and completing the contour finishing of the impeller cover and an impeller hub, wherein the semi-finishing treatment is performed by clamping the impeller forging on the lathe machining center of the numerically-controlled machine tool and carrying out the lathe machining on the impeller forging; the lathe machining in an axial feeding manner is performed until reaching an air inlet of an impeller blade; the outer contour of the impeller cover is formed by performing the lathe machining in a radial feeding manner; and the allowance of 4 to 6mm is left between the impeller cover and the impeller hub. The method has the characteristics of weldless flow channel forming surface, smooth flow channel, effective reduction in aerodynamic resistance, good aerodynamic performance and aerodynamic efficiency, good machining quality, high impeller strength, good corrosion resistance and the like.
Description
Technical field
What the present invention relates to is a kind of processing method of low discharge enclosed 3 d impeller, belongs to the processing method of Centrufugal compressor impeller.
Background technology
The low discharge 3 d impeller is the acting element of centrifugal compressor, and the characteristics of this impeller are: the inlet vane degreeof tortuosity is large, and the air outlet width is narrower, and wheel hub card and shrouding disc surface of revolution curvature are larger, and the runner deviation is large to the impeller effect of aerodynamic performance.Impeller generally comprises wheel cap, wheel hub and blade three-major-items, when blade mills on wheel cap or wheel hub, is referred to as two large part impellers.Two large part or three-major-items impellers, its parts adopt electric welding, soldering, riveted joint or combination to connect.For the low discharge 3 d impeller, because width of blade is narrow, can't adopt riveted joint and combination thereof; And adopt the electric welding mode, and meeting residual spatter thing in runner, larger on the impact of runner aerodynamic characteristic, but because the air outlet width is narrow, can't carry out reconditioning, and the impeller intensity after welding is low, corrosion-resistant.For the heavy caliber double shrouded wheel, because air inlet and air outlet width are larger, mill cutter head processed and can directly enter and carry out runner processing in the impeller channel, yet for low discharge enclosed 3 d impeller, because this impeller These characteristics can't use heavy caliber double shrouded wheel processing method to process.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and a kind of uniformity that can guarantee processing flow channel and design molded line is provided, can reduce the processing method of the low discharge enclosed 3 d impeller of Impeller Machining man-hour, the crudy that improves impeller and pneumatic efficiency.
The objective of the invention is to realize by following technical solution: this processing method may further comprise the steps: step 1 is: the impeller forging is installed on the turning center of Digit Control Machine Tool, it is carried out semifinishing; Step 2 is: process cannelure at enclosing cover for impeller, and finish the whole runner processing of impeller; Step 3 is: the wheel cap annular cover plate is welded to wheel covers, and finish the profile fine finishining of enclosing cover for impeller and wheel hub.
Step 1 of the present invention, described semifinishing is the turning center that the impeller forging is installed on Digit Control Machine Tool, the impeller forging is carried out turning, wherein axial feed turning is to the impeller blade air inlet, radial feed turning goes out the outline of wheel cap, and will guarantee to measure the spare time of 4 ~ 6mm at wheel cap and hub side.
The present invention is take cover plate radial width B and radial position dimension D as benchmark, cut out wheel cap cover plate part at the semifinishing forging, and from the cover plate B of impeller air inlet A, enclosing cover for impeller and three positions of impeller air inlet C and the orientation finish whole impeller channel roughing, semifinishing and fine finishining.
The present invention welds cover plate and the impeller hub of described enclosing cover for impeller, and its weld penetration is no more than the wheel cap cover sheet thickness; After the cover plate of enclosing cover for impeller and impeller hub welding were finished, clamping carried out finish turning in the turning center of Digit Control Machine Tool to the impeller outer profile again, eliminating welding stress,
Advantage of the present invention and good effect are:
1) the present invention compares with traditional two large parts, three-major-items Impeller Machining technique, and its runner forms no-welding-seam in the face, and the runner smoother can reduce aerodynamic drag effectively;
2) impeller that utilizes the present invention to process, its runner are finished by the processing of numerical control mill system, can meet the requirement of Impeller Design molded line fully, have preferably aeroperformance and pneumatic efficiency;
3) the low discharge enclosed 3 d impeller that adopts omni mill of the present invention method processed to process, its crudy is good, impeller intensity is high, and has good corrosion resistance.
Description of drawings
Fig. 1 is wheel member structural representation of the present invention;
Fig. 2 is impeller hub runner processing schematic diagram of the present invention;
Fig. 3 is one of flow chart of processing method of the present invention;
Fig. 4 be processing method of the present invention flow chart two;
Fig. 5 be processing method of the present invention flow chart three;
Fig. 6 be processing method of the present invention flow chart four;
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.Fig. 1 is the related wheel member figure of processing method of the present invention, and wherein a among Fig. 1 is the impeller hub part that runner has been finished the system of milling, and b is enclosing cover for impeller annular cover plate part.In Fig. 1,11 is the vane rotary center, 50 is impeller hub, and 51 is the impeller air inlet, and 52 is the impeller air outlet, 53 is the impeller hub meridian surface shape, 54 is the enclosing cover for impeller meridian surface shape, and 54a is impeller hub blade and enclosing cover for impeller cover plate contact portion molded line, and 55 is the remaining wheel of impeller hub cover, B is for cutting out impeller hub cover plate radial width, and D is for cutting out impeller hub cover plate radial position size; In Fig. 1 b, 41 is enclosing cover for impeller cover plate and impeller blade contact surface, and 42 and 43 is that the remaining shrouding disc of wheel cap cover plate and impeller hub circumferentially cooperates ring surface.
Fig. 2 is the related impeller hub runner processing schematic diagram of processing method of the present invention, can find out that NC cutting tool can mill system processing to impeller channel in A, B, three positions of C and orientation from Fig. 2 by excavating the wheel cap cover plate at enclosing cover for impeller.For low discharge enclosed 3 d impeller, cover plate radial width B and radial position dimension D are determined, are carried out verification by 3D sculpting software UG and NC Machining Software MAX-5.
Processing method of the present invention may further comprise the steps: step 1 is: the impeller forging is installed on the turning center of Digit Control Machine Tool, it is carried out semifinishing; Step 2 is: process cannelure at enclosing cover for impeller, and finish the whole runner processing of impeller; Step 3 is: the wheel cap annular cover plate is welded to wheel covers, and finish the profile fine finishining of enclosing cover for impeller and wheel hub.
Step 1 of the present invention, described semifinishing is the turning center that the impeller forging is installed on Digit Control Machine Tool, the impeller forging is carried out turning, wherein axial feed turning is to the impeller blade air inlet, radial feed turning goes out the outline of wheel cap, and will guarantee to measure the spare time of 4 ~ 6mm at wheel cap and hub side.
The present invention is take cover plate radial width B and radial position dimension D as benchmark, cut out wheel cap cover plate part at the semifinishing forging, and from the cover plate B of impeller air inlet A, enclosing cover for impeller and three positions of impeller air inlet C and the orientation finish whole impeller channel roughing, semifinishing and fine finishining.
The present invention welds cover plate and the impeller hub of described enclosing cover for impeller, and its weld penetration is no more than the wheel cap cover sheet thickness; After the cover plate of enclosing cover for impeller and impeller hub welding were finished, clamping carried out finish turning in the turning center of Digit Control Machine Tool to the impeller outer profile again, eliminating welding stress,
Can enclosing cover for impeller cannelure width of the present invention and location positioning be related to the system of milling that finish whole distortion runner.Set wheel cap cannelure width and location parameter, utilize three-dimensional solid modeling UG software to finish its moulding, and use MAX-5 software simulation numerical control cutter head machining locus, can judgement finish the omni mill system processing to whole runner; The impeller annular cover plate that shapes is placed on the impeller semifinishing part, welds, welding manner can be selected soldering, electric welding or its combination; At last, welding posterior lobe wheel is carried out fine finishining, so that its appearance and size reaches drawing requirement.
Embodiment:
Fig. 3-Fig. 6 is the flow chart of processing low discharge enclosed 3 d impeller of the present invention, wherein:
As shown in Figure 3, solid forging is installed on the numerical control machining center, forging is carried out turning, axial feed turning is to impeller blade air inlet 51, and radial feed turning goes out the outline of wheel cap, notes guaranteeing allowance 4 ~ 6mm;
According to cover plate radial width B and radial position dimension D, cut out wheel cap cover plate part at the semifinishing forging, as shown in Figure 4; According to method shown in Figure 2, finish whole impeller channel roughing, semifinishing and fine finishining from A, B, three positions of C and orientation, finish this processing step after, the impeller channel size meets Geometrical Tolerance Principle fully.
As shown in Figure 5, cooperate enclosing cover for impeller cover plate and impeller hub, as requested above-mentioned impeller two parts are welded, notice that weld penetration does not surpass the wheel cap cover sheet thickness.
After the welding of enclosing cover for impeller cover plate and impeller hub is finished, eliminate welding stress, clamping carries out finish turning to the impeller outer profile and reaches drawing requirement in the turning center of Digit Control Machine Tool again.
Adopt processing method processing low discharge enclosed 3 d impeller of the present invention, because impeller air inlet and air outlet width are narrow, as impeller outer diameter at 350mm, impeller air outlet width about 6mm, material adopts high-strength stainless steel, be no more than 60 hours its actual process time; Secondly, for double shrouded wheel, the wheel cap stress level is lower, and by overspeed test and carrying out flaw detection, impeller deflection and intensity are finished and satisfied technological requirement; Because impeller is for milling system processing fully, flow channel shape and drawing molded line are in full accord, and runner is smooth, can improve impeller isentropic efficiency 1 ~ 3 percentage point.
Claims (4)
1. the processing method of a low discharge enclosed 3 d impeller, it is characterized in that this processing method may further comprise the steps: step 1 is: the impeller forging is installed on the turning center of Digit Control Machine Tool, it is carried out semifinishing; Step 2 is: process cannelure at enclosing cover for impeller, and finish the whole runner processing of impeller; Step 3 is: the wheel cap annular cover plate is welded to wheel covers, and finish the profile fine finishining of enclosing cover for impeller and wheel hub.
2. the processing method of low discharge enclosed 3 d impeller according to claim 1, it is characterized in that described step 1, described semifinishing is the turning center that the impeller forging is installed on Digit Control Machine Tool, the impeller forging is carried out turning, wherein axial feed turning is to the impeller blade air inlet, radial feed turning goes out the outline of wheel cap, and will guarantee to measure the spare time of 4 ~ 6mm at wheel cap and hub side.
3. the processing method of low discharge enclosed 3 d impeller according to claim 1 and 2, it is characterized in that take cover plate radial width B and radial position dimension D as benchmark, cut out wheel cap cover plate part at the semifinishing forging, and from the cover plate B of impeller air inlet A, enclosing cover for impeller and three positions of impeller air inlet C and the orientation finish whole impeller channel roughing, semifinishing and fine finishining.
4. the processing method of low discharge enclosed 3 d impeller according to claim 3 is characterized in that the cover plate of described enclosing cover for impeller and impeller hub weld, and its weld penetration is no more than the wheel cap cover sheet thickness; After the cover plate of enclosing cover for impeller and impeller hub welding were finished, clamping carried out finish turning in the turning center of Digit Control Machine Tool to the impeller outer profile again.
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| CN201210502316.1A CN102990302B (en) | 2012-11-30 | 2012-11-30 | A kind of processing method of low discharge enclosed 3 d impeller |
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| CN102990302B CN102990302B (en) | 2016-04-13 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381543A (en) * | 2013-07-25 | 2013-11-06 | 贵州永红航空机械有限责任公司 | Method for manufacturing major diameter enclosed impeller |
| CN103551813A (en) * | 2013-11-11 | 2014-02-05 | 中国南方航空工业(集团)有限公司 | Machining method for plasma-sprayed surface of internal annular surface of annular housing |
| CN103586392A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| CN104279186A (en) * | 2014-09-17 | 2015-01-14 | 杭州杭氧透平机械有限公司 | High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method |
| CN105269278A (en) * | 2015-11-19 | 2016-01-27 | 湖北双剑鼓风机股份有限公司 | Machining method for three-dimensional flow impeller |
| CN105563053A (en) * | 2014-11-05 | 2016-05-11 | 沈阳鼓风机集团齿轮压缩机有限公司 | Machining process for ultra-thin 3D integral impeller |
| CN106122083A (en) * | 2016-08-26 | 2016-11-16 | 常州索拉尔熔盐泵阀科技有限公司 | Pump for liquid salts combination type blade wheel |
| CN106216968A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | Dual-gripper air vane enclosing cover and the processing method of wheel disc |
| CN106216967A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller wheel cap |
| CN111037242A (en) * | 2019-12-18 | 2020-04-21 | 沈阳鼓风机集团齿轮压缩机有限公司 | Finish machining method for ternary impeller |
| CN113909814A (en) * | 2021-10-12 | 2022-01-11 | 东方电气集团东方电机有限公司 | Method for machining impeller disc of high-head water pump turbine |
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| EP1854570A1 (en) * | 2005-02-22 | 2007-11-14 | Hitachi Metals Precision, Ltd. | Compressor impeller and method of manufacturing the same |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381543B (en) * | 2013-07-25 | 2015-07-22 | 贵州永红航空机械有限责任公司 | Method for manufacturing major diameter enclosed impeller |
| CN103381543A (en) * | 2013-07-25 | 2013-11-06 | 贵州永红航空机械有限责任公司 | Method for manufacturing major diameter enclosed impeller |
| CN103551813A (en) * | 2013-11-11 | 2014-02-05 | 中国南方航空工业(集团)有限公司 | Machining method for plasma-sprayed surface of internal annular surface of annular housing |
| CN103586392A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| CN103586392B (en) * | 2013-11-15 | 2015-05-27 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| CN104279186A (en) * | 2014-09-17 | 2015-01-14 | 杭州杭氧透平机械有限公司 | High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method |
| CN105563053A (en) * | 2014-11-05 | 2016-05-11 | 沈阳鼓风机集团齿轮压缩机有限公司 | Machining process for ultra-thin 3D integral impeller |
| CN105269278A (en) * | 2015-11-19 | 2016-01-27 | 湖北双剑鼓风机股份有限公司 | Machining method for three-dimensional flow impeller |
| CN105269278B (en) * | 2015-11-19 | 2019-02-19 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller |
| CN106122083A (en) * | 2016-08-26 | 2016-11-16 | 常州索拉尔熔盐泵阀科技有限公司 | Pump for liquid salts combination type blade wheel |
| CN106216968A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | Dual-gripper air vane enclosing cover and the processing method of wheel disc |
| CN106216967A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller wheel cap |
| CN111037242A (en) * | 2019-12-18 | 2020-04-21 | 沈阳鼓风机集团齿轮压缩机有限公司 | Finish machining method for ternary impeller |
| CN113909814A (en) * | 2021-10-12 | 2022-01-11 | 东方电气集团东方电机有限公司 | Method for machining impeller disc of high-head water pump turbine |
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