CN201599248U - Connection structure of compressor impeller and rotor shaft of turbo super charger - Google Patents
Connection structure of compressor impeller and rotor shaft of turbo super charger Download PDFInfo
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- CN201599248U CN201599248U CN2010200554866U CN201020055486U CN201599248U CN 201599248 U CN201599248 U CN 201599248U CN 2010200554866 U CN2010200554866 U CN 2010200554866U CN 201020055486 U CN201020055486 U CN 201020055486U CN 201599248 U CN201599248 U CN 201599248U
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- rotor shaft
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- hole
- compression impellor
- positioning
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Abstract
The utility model discloses a connection structure of a compressor impeller and a rotor shaft of a turbo super charger, which comprises the compressor impeller and the rotor shaft which are in torque transmission relation. A threaded hole is arranged at an inlet end of the compressor impeller; the thread turning direction of the threaded hole is opposite to the rotating direction of the rotor shaft; a positioning hole with a diameter larger than the top diameter of the threaded hole is coaxially arranged at an output end of the compressor impeller; a threaded shaft and a positioning shaft are arranged on the rotor shaft; the threaded shaft matches with the threaded hole of the compressor impeller to form self-locking connection; small interference is formed by the positioning shaft and the impeller positioning hole; a shaft shoulder is arranged at the tail end of the positioning shaft; the lateral surface of the shaft shoulder is closely attached to the end surface of the output end of the compressor impeller; connection threads of the compressor impeller threaded hole and the threaded shaft of the rotor shaft are rectangular or trapezoid single-head, double-head or three-head threads; and a process hole for installing and correcting dynamic balance is arranged on the inlet end surface of the compressor impeller. The connection structure has the advantages that the compressor impeller and the rotor shaft are firmly connected, and the connection structure has reliable torque transmission, large safety margin, deformation of assembly and disassembly, simple processing, low requirements on operation skills and long service life.
Description
Technical fieldThe utility model relates to a kind of turbocharger rotor parts, the linkage structure of particularly a kind of turbosupercharger compression impellor and rotor shaft.
Background techniqueTurbosupercharger is to improve a kind of additional device of gasoline or diesel internal combustion acc power under the constant condition of engine displacement, the exhaust gas-driven turbine that it utilizes the I. C. engine exhaust road to discharge, turbine drives the compression impellor rotation by rotor shaft, the air that the impeller force feed is sent here by the air-strainer pipeline, make it compression and enter engine cylinder, to strengthen the air inflow of engine cylinder by increase air density, strengthen oil inlet quantity subsequently, make motor be issued to the purpose that improves power in the condition that does not increase discharge capacity.
At present, support and interior support were two kinds outside the rotor part supporting form of use for diesel engine turbosupercharger had, outer support rotor is meant arranges compression impellor and turbine between the two bearings of rotor shaft, the interior support is meant that compression impellor and turbine overhang at the two ends of rotor shaft, perhaps are expressed as two bearings and are arranged between compression impellor and the turbine.Turbosupercharger for inner supporting structure, usually the impeller center adopts through hole to take interference fit to be connected with rotor part, compression impellor for high pressure ratio adopts the through-hole structure form because the linear velocity of impeller outer diameter is increased to impeller, it takes turns back of the body stomidium mouth because the centrifugal stress that high rotating speed produces is excessive, and impeller reliability and life-span are sharply reduced the possibility that loses application.Have only the mode that is threaded that adopts from the result of finite Element Intensity Analysis, normally at the additional behind one section solid of rotation that radius is less of the wheel of impeller, as the entity that the screw thread wheel hub is set, realization is threaded with rotor part its mode of execution.Because the structure that adopts wheel to be threaded behind, realize easily on the layout, and designing and calculating is simple, and the position of impeller maximum stress can be adjusted easily and be arranged, thereby can design similar, wheel back structure and thread connecting mode that size is different, but the deficiency of this Placement is the additional behind segment structure of the wheel of impeller increases the impeller axial dimension, and weight increases, and rotary inertia increases, the material that Impeller Machining is removed increases, and manufacture cost increases.Turbosupercharger for outer support rolling bearing structure, compression impellor mainly contains following dual mode with being connected of rotor shaft, the one, be provided with keyway at impeller cylinder endoporus, keyway is arranged in the connection cooperation place of rotor shaft, cooperate the key that protrudes, impeller and rotor shaft transmit the moment of torsion of impeller need of work by the fitting surface of key and keyway; The 2nd, the impeller endoporus is a unthreaded hole, the groove of arranging the ring-type taper on the inlet end face of impeller constitutes the elastic groove structure, the impeller endoporus cooperates cylindrical section to adopt the Placement of interference fit with rotor shaft, after adding thermal expansion with impeller, be enclosed within on the rotor shaft in when assembling, and before suit, cooperate section to carry out sand blast and form coarse hair side rotor shaft, to improve the friction factor that cooperates surface of contact, the moment of torsion that reaches impeller and rotor shaft transmits purpose, the ring-type conical socket makes the entrance point of impeller and rotor shaft form elastic compression, to improve the distribution of contact stress, improve the fastening reliability and the working life of impeller.And use not employing on the pressurized machine of thread connecting mode at based on external supporting structure of more general impeller and rotor shaft at the super-turbocharger of inner supporting structure, one of reason is that the dynamics of outer support rotor axle is relatively more responsive to impeller weight and position of centre of gravity, be subject to bulk simultaneously, the impeller wheel back of the body can not add the additional entities of arranging screw thread; It two is constructive accountings of decades, and compression impellor adopts the structure that is designed to the elastic groove interference fit to become natural industry " design standard "; It three is that to be threaded be complete nonlinear contact problem, and finite element analysis needs the experience accumulation of high theoretical basis and practical proof.
Along with the development of diesel technology, its design and manufacture level also improve constantly.Particularly improving constantly of marine diesel engine reinforcing degree causes the also corresponding raising with rotating speed of pressure of compressed air of turbosupercharger, and the tensile stress that the impeller endoporus bears constantly increases.As keyway Placement simple in structure because contact stress is big, for the turbosupercharger of using this moment of torsion transfer mode without any margin of safety.Have the flexible torque transfer arrangement of entrance point ring-type conical socket though adopt, the applied environment that the magnitude of interference that cooperates by control improves for usage requirement, the fastening reliability of impeller is can be not affected, but this structure impeller need could mount and dismount through heating, technical ability to the operator requires high, easily the impeller burning taking place and causes the situation of scrapping in the installation and removal process, simultaneously, heating can cause impeller hardness to descend, for preventing that impeller from reducing in the course of the work fatigue life, impeller must have enough hardness, therefore, generally installing, after dismantling two to three times, check that impeller hardness does not reach the lowest hardness requirement, just need do to scrap processing, thereby cause customer using cost to increase impeller.
Summary of the inventionPurpose of the present invention is exactly at the deficiencies in the prior art, provides a kind of and is connected firmly, the moment of torsion transmission is reliable, margin of safety big, installation and removal are indeformable, processing is simple, operative skill requires low, the turbosupercharger compression impellor of low cost of manufacture and the linkage structure of rotor shaft.
For achieving the above object, the present invention adopts following technological scheme:
The linkage structure of a kind of turbosupercharger compression impellor and rotor shaft, comprise the compression impellor and the rotor shaft that are mutually permanently connected and form the moment of torsion transitive relation, the entrance point of described compression impellor is provided with tapped hole, the thread rotary orientation of tapped hole is opposite with the rotor shaft sense of rotation, and the outlet end of compression impellor is provided with entrance point tapped hole coaxial line and diameter and pushes up the positioning hole in footpath greater than tapped hole; Described rotor shaft is provided with thread spindle, positioning shaft, and thread spindle cooperates to form when working with the tapped hole of compression impellor and is connected from tightening, and positioning shaft forms slight interference with the positioning hole of compression impellor and cooperates; Described rotor shaft also is provided with the shaft shoulder, and the shaft shoulder is positioned at the positioning shaft end, and the end face of the side of the shaft shoulder and compression impellor outlet end fits tightly.
Make full use of modern finite Element Intensity Analysis means and design application experience in the present invention, solved compression impellor in high speed rotating lower inlet end wheel bore expansion and radial shear principal axes of stress to the bigger problem of distribution gradient, thereby can at the impeller inlet end screw thread be set breakthroughly, and then adopt impeller and the structural type of rotor shaft to be threaded togather.
After adopting as above technological scheme, compression impellor and rotor shaft are achieved a fixed connection by the shaft shoulder of connecting thread, rotor shaft and the exit end face of impeller, the positioning hole of compression impellor cooperates with the slight interference of rotor shaft positioning shaft, realize compression impellor and the coaxial purpose of rotor shaft centering, wherein, slight interference is meant that the matching allowance of positioning hole and positioning shaft is less, and satisfying does not need impeller is heated the assembling that just can finish compression impellor and dismantles the situation that requires; Simultaneously, because compression impellor is opposite with the rotor shaft sense of rotation with the connecting thread direction of rotor shaft, in the turbocharger operation process, there is a kind of more and more tighter trend in compression impellor with being threaded of rotor shaft.So it is connected firmly, the moment of torsion transmission is reliable, installation and removal are indeformable, easy to process, operative skill requires low, low cost of manufacture; Simultaneously,, there is not thermal expansion problem, the back impeller is installed do not cooled off the axial position deviation that causes after the contraction, the actual meridian gap of impeller and design load Percent of contact area height, high conformity because the impeller installation and removal need not heated; In addition, can design the screw-thread fit length of compression impellor and rotor shaft as required, reach impeller and rotor shaft parts working strength required enough margin of safety and working life.
Preferably, be evenly equipped with 8～16 auxiliary holes of setting the diameters and the degree of depth on the end face of compression impellor entrance point in the form of a ring, in the auxiliary hole or closely be connected with balanced column, the tail end of balanced column is lower than the end face of compression impellor entrance point; The setting of the quantity of auxiliary hole, diameter and the degree of depth is determined according to Dimensions, blade quantity, the processing technology level of compression impellor, is principle to improve compression impellor and the moving dynamic balancing calibration operation efficient of rotor part; Whether being connected with balanced column in the auxiliary hole, is to decide according to the dynamic balancing calibration situation of compression impellor and rotor part, when needing, connects one or more balanced column in an auxiliary hole therein, otherwise, do not need balanced column.Auxiliary hole can be unthreaded hole or tapped hole, when auxiliary hole was unthreaded hole structural type, balanced column adopted interference fit with it, and the material coefficient of thermal expansion coefficient of the material of balanced column and compression impellor is approaching, to guarantee that balanced column and compression impellor are connected firmly after the compression impellor operating temperature raises; When auxiliary hole thread pore structure form, balanced column is for forming the screw column that screw threads for fastening connects with it, and the easy accessibility that is threaded is beneficial to and changes the position, auxiliary hole hole that matches with balanced column when balance is calibrated; Simultaneously, another effect that auxiliary hole is set is to use for assembling and dismounting, auxiliary hole transmits bearing pin with the moment of torsion of the tightening tool of compression impellor and cooperates, auxiliary hole adopts the worm structure form, can guarantee that in assembling or unloading process on the inlet end face of compression impellor, screw replaces moment of torsion transmission bearing pin to be connected with thread fiting mode with auxiliary hole to tightening tool by screw in compression, do not have relative movement between the two, can not cause damage and influence impeller working life auxiliary hole; In addition, at needs when increasing the weight of to satisfy requirement for dynamic balance, balanced column is realized in the mode that is threaded with auxiliary hole, it is whole to connect fastening, the adjustable positions of balanced column on the degree of depth of auxiliary hole, the accurate requirement for dynamic balance of easier realization, and being lower than the end face of compression impellor entrance point, the tail end of balanced column makes its end face flat appearance, safe in utilization; Realize assembling or dismounting purpose.
Preferably, auxiliary hole is a kind of in M6, M8, the M10 tapped hole; The screw column of described balanced column for matching with auxiliary hole; The diameter of tapped hole is too small, corresponding the reducing of balanced column diameter that is complementary, and its tightening tool is just little certainly, must bring inconvenient operation and tighten unstable hidden danger; The diameter of tapped hole is excessive, the corresponding increase of balanced column diameter that is complementary, and its quality must strengthen, and is difficult to reach the precision requirement of dynamic balancing calibration.It is consistent with the tail structure of common Cock screw that the afterbody of balanced column is tightened structure, as be applicable to inner hexagon spanner the inner hexagon spanner hole, be applicable to the wabbler screwdriver the cross counter sink, be applicable to the in-line fluting of a word screwdriver etc.; Processing is simple, easy to operate, screw-down torque enough to satisfy, to tighten firmly be principle.
Preferably, auxiliary hole is the tapped hole of M8, and quantity is 12; Can better satisfy the assembly and disassembly moment requirement of impeller, guarantee that auxiliary hole is not damaged, simultaneously, satisfy the counterweight mode requirement that balance adds balanced column, balanced column and auxiliary hole are connected firmly, and can comparatively fast realize the dynamic balancing calibration.
Preferably, the connecting thread of compression impellor tapped hole and rotor shaft thread spindle is a kind of in single head, double end or the triple thread; How many numbers of connecting thread has determined the speed of installation and removal, and join strength is not exerted an influence, but therefore lead angle and self-tightening performance can change, as long as satisfy the self-tightening performance requirement that it is threaded, so installation and removal are quick, high working efficiency.
Preferably, the connecting thread form of the thread spindle of the tapped hole of compression impellor and rotor shaft is a kind of in standard V thread screw or the standard trapezoidal thread; These two kinds of thread forms belong to thread forms commonly used, and machining tool does not have specific (special) requirements, and can satisfy the transmission of torque requirement, can guarantee the self-tightening performance requirement yet, its simple in structure, easy to process, low cost of manufacture.
Preferably, be connected with transitional pore between the tapped hole of compression impellor and the positioning hole, the aperture of transitional pore greater than positioning hole aperture and tapped hole at the bottom of the footpath, be rounding off between transitional pore and positioning hole and the tapped hole and be connected; The setting of transitional pore is beneficial to the working stress of improving compression impellor and distributes, and be rounding off between transitional pore and positioning hole and the tapped hole and be connected, the concentrated hidden danger of the stress of elimination joint, thus guarantee the long working life of compression impellor.
The invention has the beneficial effects as follows that actual meridian gap high conformity, processing and the assembling that compression impellor and rotor shaft are connected firmly, the moment of torsion transmission is reliable, margin of safety is big, installation and removal are indeformable, impeller is installed the no axial position deviation in back, impeller is simple, the operative skill requirement is low, low cost of manufacture, long service life.
Description of drawingsFig. 1 is a structural representation of the present invention;
Fig. 2 is a compression impellor plan view of the present invention;
Fig. 3 is a balanced column structural representation of the present invention;
Fig. 4 is the plan view of Fig. 3 of the present invention;
Fig. 5 is the compression impellor that prior art middle-end of the present invention is worn the groove elastic groove structure of ring-type taper, and 15 is the groove elastic groove of ring-type taper among the figure.
EmbodimentThe present invention is further illustrated below in conjunction with accompanying drawing:
Referring to Fig. 3, Fig. 4, described balanced column 32 is a screw column, and its tail end is provided with inner hexagon spanner hole 321.
At embodiment 1, only need to change the part-structure parameter and can realize following examples 2～6.
All the other structures of present embodiment are identical with embodiment 1, do not repeat them here.
All the other structures of present embodiment are identical with embodiment 1, do not repeat them here.
Embodiment 4 is referring to Fig. 1, and described auxiliary hole 31 is 16 tapped holes that the diameter of thread is M6, by screw-thread fit balanced column 32 (not shown)s is arranged in one or more auxiliary holes 31.
All the other structures of present embodiment are identical with embodiment 1, embodiment 2 or embodiment 3, do not repeat them here.
Embodiment 5 is referring to Fig. 1, and described auxiliary hole 31 is that 8 diameters of thread are M10 tapped hole auxiliary hole 31 is uniform in the form of a ring on the end face of compression impellor 1 entrance point, by screw-thread fit balanced column 32 (not shown)s is arranged in one or more auxiliary holes 31.
All the other structures of present embodiment are identical with embodiment 4, do not repeat them here.
Embodiment 6 is referring to Fig. 1, and described compression impellor 1 tapped hole 11 is standard trapezoidal threads with the connecting thread of rotor shaft 2 thread spindles 21.
All the other structures of present embodiment are identical with any one embodiment among the embodiment 1～5, do not repeat them here.
Though more than combine accompanying drawing and described embodiments of the present invention, but those of ordinary skill in the art can recognize also and make various variations in the scope to claims or modification is feasible that these modifications and variations are interpreted as within scope of the present invention and intention.
Claims (7)
1. the linkage structure of turbosupercharger compression impellor and rotor shaft, comprise the compression impellor (1) and the rotor shaft (2) that are mutually permanently connected and become the moment of torsion transitive relation, it is characterized in that: the entrance point of described compression impellor (1) is provided with tapped hole (11), the thread rotary orientation of tapped hole (11) is opposite with rotor shaft (2) sense of rotation, and the outlet end of compression impellor (1) is provided with entrance point tapped hole (11) coaxial line and diameter and pushes up the positioning hole (12) in footpath greater than tapped hole (11); Described rotor shaft (2) is provided with thread spindle (21), positioning shaft (22), and thread spindle (21) cooperates the formation self-locking to be connected with the tapped hole (11) of compression impellor (1), and positioning shaft (22) forms slight interference with the positioning hole (12) of compression impellor (1) and cooperates; Described rotor shaft (2) also is provided with the shaft shoulder (23), and the shaft shoulder (23) is positioned at positioning shaft (22) end, and the end face (14) of the side of the shaft shoulder (23) and compression impellor (1) outlet end fits tightly.
2. the linkage structure of turbosupercharger compression impellor according to claim 1 and rotor shaft, it is characterized in that: be evenly equipped with 8～16 auxiliary holes (31) of setting the diameter and the degree of depth on the end face of described compression impellor (1) entrance point in the form of a ring, in the auxiliary hole (31) or closely be connected with balanced column (32), the tail end of balanced column (32) is lower than compression impellor (1) entrance point end face.
3. the linkage structure of turbosupercharger compression impellor according to claim 2 and rotor shaft is characterized in that: described auxiliary hole (31) is a kind of in M6, M8, the M10 tapped hole; The screw column of described balanced column (32) for matching with auxiliary hole (31).
4. the linkage structure of turbosupercharger compression impellor according to claim 3 and rotor shaft is characterized in that: described auxiliary hole (31) is the tapped hole of M8, and quantity is 12.
5. the linkage structure of turbosupercharger compression impellor according to claim 1 and 2 and rotor shaft is characterized in that: the connecting thread of described compression impellor (1) tapped hole (11) and rotor shaft (2) thread spindle (21) is a kind of in single head, double end or the triple thread.
6. the linkage structure of turbosupercharger compression impellor according to claim 1 and 2 and rotor shaft is characterized in that: the connecting thread form of described compression impellor (1) tapped hole (11) and rotor shaft (2) thread spindle (21) is a kind of in V thread screw or the trapezoidal thread.
7. the linkage structure of turbosupercharger compression impellor according to claim 1 and 2 and rotor shaft, it is characterized in that: be connected with transitional pore (13) between the tapped hole (11) of described compression impellor (1) and the positioning hole (12), the aperture of transitional pore (13) is greater than positioning hole (12) aperture and footpath, tapped hole (11) end, and transitional pore (13) is rounding off with positioning hole (12) with tapped hole (11) and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200554866U CN201599248U (en) | 2010-01-21 | 2010-01-21 | Connection structure of compressor impeller and rotor shaft of turbo super charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200554866U CN201599248U (en) | 2010-01-21 | 2010-01-21 | Connection structure of compressor impeller and rotor shaft of turbo super charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201599248U true CN201599248U (en) | 2010-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200554866U Expired - Lifetime CN201599248U (en) | 2010-01-21 | 2010-01-21 | Connection structure of compressor impeller and rotor shaft of turbo super charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201599248U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757545A (en) * | 2018-07-06 | 2018-11-06 | 无锡市海星船舶动力有限公司 | The armature spindle that installation rigidized cover is bonded |
| CN110017300A (en) * | 2019-05-16 | 2019-07-16 | 上海优社动力科技有限公司 | A kind of self-locking type Centrufugal compressor impeller structure |
-
2010
- 2010-01-21 CN CN2010200554866U patent/CN201599248U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757545A (en) * | 2018-07-06 | 2018-11-06 | 无锡市海星船舶动力有限公司 | The armature spindle that installation rigidized cover is bonded |
| CN110017300A (en) * | 2019-05-16 | 2019-07-16 | 上海优社动力科技有限公司 | A kind of self-locking type Centrufugal compressor impeller structure |
| CN110017300B (en) * | 2019-05-16 | 2024-01-30 | 上海优社动力科技有限公司 | Self-locking centrifugal compressor impeller structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Mingbao Technology Development Co., Ltd. Assignor: Chongqing Turbo Flow Machinery Manufacturing Co., Ltd. Contract record no.: 2012500000009 Denomination of utility model: Connecting structure for compressor impeller and rotor spindle of turbocharger Granted publication date: 20101006 License type: Exclusive License Record date: 20120307 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
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| CX01 | Expiry of patent term |