CN114083396A - Turbine rotor blade tip grinding adapter clamp and mounting method thereof - Google Patents
Turbine rotor blade tip grinding adapter clamp and mounting method thereof Download PDFInfo
- Publication number
- CN114083396A CN114083396A CN202010857598.1A CN202010857598A CN114083396A CN 114083396 A CN114083396 A CN 114083396A CN 202010857598 A CN202010857598 A CN 202010857598A CN 114083396 A CN114083396 A CN 114083396A
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- Prior art keywords
- adapter
- blade tip
- sleeve
- flange
- turbine rotor
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
- B23P21/004—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control the units passing two or more work-stations whilst being composed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The adapter fixture for the turbine rotor blade tip grinding and the mounting method thereof are provided, so that the high-pressure turbine rotor can be mounted on turbine rotor blade tip grinding equipment for grinding. The turbine rotor comprises a drum shaft at the front end and a rear shaft neck at the rear end, wherein the rear shaft neck is provided with an external thread part and an end face clamping groove at the rear end; the front end clamp is connected with the drum shaft and provides a front cylindrical surface clamped by the clamp of the blade tip grinding equipment; the rear end clamp comprises a switching shaft sleeve, a front flange and a pressed end face, wherein the switching shaft sleeve comprises a connecting ring, the front flange is arranged at the rear end of the connecting ring, the pressed end face is arranged at the rear end of the connecting ring, and the connecting ring is used for being sleeved on the peripheral surface of the rear shaft neck and is in interference fit with the peripheral surface of the rear shaft neck; the adapter ring comprises a rear cylindrical surface clamped by a clamp of the blade tip grinding equipment, and an end tooth and a rear flange which are arranged at the front end, the rear flange is connected with the front flange through a fastener, and the end tooth is aligned with and meshed with the end surface clamping groove so as to enable the adapter ring to stop rotating in the circumferential direction; the pressing nut is sleeved on the external thread part at the rear end of the rear shaft neck and is in threaded connection with the external thread part to press the adapter sleeve tightly.
Description
Technical Field
The invention relates to a transition fixture for connecting a turbine rotor to a turbine rotor tip grinding apparatus.
Background
The high-pressure turbine rotor is an important component of an aircraft engine, the blade size of the high-pressure turbine rotor directly influences the performance of the aircraft engine rotor, and in order to guarantee the blade tip size, the high-pressure turbine rotor needs to be ground on high-speed blade tip grinding equipment after being assembled, so that the diameter of the blade and the blade tip jumping are guaranteed. The sizes of the front end of a drum shaft and the rear end of a rear shaft neck of a model high-pressure turbine rotor cannot meet the requirement of being directly installed on a hydraulic clamp of high-speed blade tip grinding equipment, and blade tip grinding clamps are required to be installed at the front end of the drum shaft and the rear end of the rear shaft neck and can be installed on the hydraulic clamp of the high-speed blade tip grinding equipment. The outer diameter of the rear journal exceeds the maximum diameter which can be satisfied by the hydraulic clamp of the equipment, the rear end of the rear journal is free of bolt holes, and after the blade tip grinding clamp is installed, on the premise that axial fixation is guaranteed, the clamp and the rear journal do not rotate circumferentially in work.
Disclosure of Invention
The invention aims to provide a turbine rotor blade tip grinding adapter fixture, so that a high-pressure turbine rotor can be mounted on turbine rotor blade tip grinding equipment for grinding.
In one embodiment of the turbine rotor blade tip grinding adapter fixture, the turbine rotor comprises a front drum shaft and a rear journal, the rear journal being provided with an external threaded portion and an end face slot at its rear end; the front end clamp is connected with the drum shaft and provides a front cylindrical surface clamped by the clamp of the blade tip grinding equipment; the rear end clamp comprises a switching shaft sleeve which comprises a connecting ring, a front flange arranged at the rear end of the connecting ring and a pressed end face at the rear end of the connecting ring, and the connecting ring is sleeved on the outer peripheral surface of the rear shaft neck and is in interference fit with the outer peripheral surface of the rear shaft neck; the rear end of the blade tip grinding device is provided with a clamping groove, and the clamping groove is provided with a rear cylindrical surface; the rear end clamp comprises a compression nut which is sleeved on an external thread part at the rear end of the rear shaft neck, is in threaded connection and is pressed on the pressed end face so as to compress the switching shaft sleeve.
In an embodiment of the turbine rotor blade tip grinding and transferring clamp, a front end of the front end clamp is connected to a front end lifting appliance, and a rear end of the adapter ring of the rear end clamp is connected to a rear end lifting appliance.
In one embodiment of the turbine rotor blade tip grinding adapter fixture, the front flange and the rear flange are in surface-to-surface contact and are connected in a spigot manner and then are fastened by a fastener.
In an embodiment of the method of installing a turbine rotor blade tip mill adapter fixture,
providing the turbine rotor blade tip grinding adapter fixture;
heating the adapter sleeve, and keeping the temperature for a certain time to ensure that the adapter sleeve can be in clearance fit with the rear shaft neck;
mounting the adapter sleeve on the rear journal and determining a circumferential mounting angle of the adapter sleeve;
installing the compression nut to compress the adapter sleeve;
after the adapter sleeve returns to the room temperature, the compression nut is screwed again;
in the process of mounting the adapter ring on the adapter shaft sleeve, aligning the end teeth on the adapter ring and the clamping grooves of the rear shaft neck at the same time, and connecting the front flange and the rear flange by using bolts to fix the adapter ring on the adapter shaft sleeve;
connecting the nose clip to the drum shaft.
In one embodiment of the installation method, an angular positioning element is selected before installing the adapter sleeve on the rear journal, the angular positioning element having an elongated portion, and the angular positioning element is installed on the front flange of the adapter sleeve;
and under the condition that the elongated part of the angular positioning piece can be aligned with the end face clamping groove of the rear journal, the switching shaft sleeve is installed on the rear journal, and therefore the circumferential installation angle of the switching shaft sleeve is determined.
In one embodiment of the installation method, locating pins are provided on the front flange and locating pin holes are provided on the rear flange; and in the process of mounting the adapter ring on the adapter shaft sleeve, the positioning pin and the positioning pin hole are aligned, and the end teeth on the adapter ring and the clamping groove of the rear shaft neck are aligned at the same time.
Through interference fit, the tooth's socket aligns the compressing tightly of connecting and clamp bolt, even if rear end anchor clamps are split type structural design, also can guarantee to have spacingly between rear end anchor clamps and the turbine rotor, guarantees can not produce relative motion or rotation, has guaranteed the safety of apex mill in-process part. The turbine rotor blade tip grinding datum is rotated to the structure that the rear end clamp can be matched with blade tip grinding equipment, so that rotor assemblies of different models and sizes can be mounted on the high-speed blade tip grinding equipment, a hydraulic clamp of the equipment does not need to be customized, and the cost is saved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the installation of a turbine rotor blade tip mill adapter fixture.
FIG. 2 is a schematic view of the back end clip mounted to the back journal.
FIG. 3 is a rear end view of the adaptor sleeve of the rear end clamp mounted to the rear journal.
Fig. 4 is a right end view of the adaptor sleeve.
Fig. 5 is a half sectional view of the adaptor sleeve.
Fig. 6 is a half sectional view of the adapter ring.
Fig. 7 is a left end view of the adapter ring.
Figure 8 is a cross-sectional view of an angular positioning element.
Figure 9 is a front view of the angular positioning element.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
Fig. 1 shows a turbine rotor, in particular a high-pressure turbine rotor, comprising a drum shaft 11 and an aft journal 12. The blank portion between the drum shaft 11 and the rear journal 12 is omitted. The turbine rotor blade tip grinding and adapting clamp comprises a front end clamp 3 and a rear end clamp 2. The front end of the drum shaft 11 is connected to the front end jig 3. The rear end of the rear journal 12 is connected to the rear end jig 2.
As shown in fig. 2, the rear journal 12 is provided at its rear end with a male screw portion 121 and an end surface catching groove 122. The rear end clamp 2 comprises an adapter sleeve 21, an adapter ring 22 and a compression nut 23.
Referring to fig. 4 and 5, the adaptor sleeve 21 includes a connecting ring 210, a front flange 322 disposed at a rear end of the connecting ring 210, and a pressed end surface 212 at a rear end of the connecting ring 210, wherein the connecting ring 210 is adapted to be fitted over an outer circumferential surface of the rear journal 12 with interference.
With reference to both fig. 6 and 7, adapter ring 22 includes a rear cylindrical surface 220 that provides for gripping by clamp 42 of the tip sharpening apparatus, and an end tooth 222 and a rear flange 221 disposed at the forward end.
As shown in fig. 2, rear flange 221 is connected to front flange 211 by fasteners 24, and end teeth 222 are aligned and engaged with end surface slots 122 to circumferentially stop adapter ring 22.
The pressing nut 23 is fitted over the male screw portion 121 at the rear end of the rear journal 12 and screwed to press against the pressure receiving end surface 212 to press the adaptor sleeve 21.
Returning to fig. 1, the front end clamp 3 provides a front cylindrical surface that is clamped by the clamp 41 of the tip sharpening apparatus. Therefore, the adapter clamp can be used for grinding the tip of the turbine rotor, and the turbine rotor can be mounted on the tip grinding equipment.
Through aforementioned interference fit, the tooth's socket aligns compressing tightly of connecting and clamp bolt, even if rear end anchor clamps are split type structural design, also can guarantee to have spacingly between rear end anchor clamps and the turbine rotor, guarantees can not produce relative motion or rotation, has guaranteed the safety that the apex ground in-process part. The turbine rotor blade tip grinding datum is rotated to the structure that the rear end clamp can be matched with blade tip grinding equipment, so that rotor assemblies of different models and sizes can be mounted on the high-speed blade tip grinding equipment, a hydraulic clamp of the equipment does not need to be customized, and the cost is saved.
As shown in fig. 1, the front end of the front end clamp 3 is connected to the front end spreader 31, and the rear end of the adapter ring of the rear end clamp 2 is connected to the rear end spreader 5. Therefore, the installation of the turbine rotor on the blade tip grinding equipment can be realized, and the transportation of the turbine rotor can also be realized.
As shown in FIG. 2, the front flange 211 and the rear flange 221 are connected by surface-to-surface contact and seam allowance, and are fastened by the fastening member 24. The transfer of the turbine rotor blade tip grinding datum is facilitated through the spigot connection.
The mounting method of the turbine rotor blade tip grinding adapter clamp comprises the following steps:
the adapter sleeve 21 is heated and kept warm for a certain time, so that the adapter sleeve 21 and the rear shaft neck 12 can be in clearance fit.
The installation of the adaptor sleeve 21 onto the rear journal 12 and the determination of the circumferential installation angle of the adaptor sleeve 21 facilitates the alignment of the upper end teeth and the pockets, as well as the alignment of the individual fastener attachment holes, in the subsequent steps.
The compression nut 23 is installed and the compression nut 23 is screwed on the male screw part 121 to compress the adapter sleeve 21.
After the adapter sleeve 21 is returned to room temperature, the compression nut 23 is retightened.
During installation of the adapter ring 22 on the adapter sleeve 21, the end teeth 222 on the adapter ring 22 are aligned with the notches 122 of the rear journal 12, and the front flange 211 and the rear flange 221 are connected using fasteners 24 or bolts to secure the adapter ring 22 to the adapter sleeve 21.
The front end gripper 3 is attached to the drum shaft 11.
In order to ensure that the split structure of the rear end clamp is assembled in place at one time and aligned in the circumferential direction, and improve the assembly efficiency, before the adapter sleeve 21 is installed on the rear journal 12, the angular positioning piece 25 shown in fig. 8 and 9 is selected, and the angular positioning piece 25 is provided with the elongated portion 251. As shown in fig. 3, the angular positioning member 25 is mounted to the front flange 211 of the adaptor sleeve 21. One way of mounting is to form attachment holes at both ends of the angular positioning member 25, which are aligned with the attachment holes on the front flange 211 and then fastened with bolts 26.
The adapter sleeve 21 is mounted on the rear axle journal 12, with the elongated portions 251 of the angular positioning elements 25 being able to align with the end-face notches 122 of the rear axle journal 12, thereby determining the circumferential mounting angle of the adapter sleeve 21. The angular positioning block 25 is aligned with the slot 122 at the rear end of the rear journal 12, so that the installation of the adapter sleeve 21 meets a certain circumferential angle requirement, and then according to the adapter ring 22, the adapter ring 22 meets the requirements of both the alignment with the connecting hole of the adapter sleeve 21 and the alignment of the end tooth 222 with the slot 122 of the rear journal 12. After the adapter sleeve 21 is placed on the rear journal 12, the angular positioning elements 25 are removed.
As shown in fig. 4 and 7, the front flange 211 is provided with positioning pins 213, and the rear flange 221 is provided with positioning pin holes 223. In the process of mounting the adapter ring 22 on the adapter sleeve 21, the positioning pin 213 and the positioning pin hole 223 are aligned, and the end tooth 222 on the adapter ring 22 and the slot 122 of the rear journal 12 are aligned, so that the positioning and mounting functions are achieved, and the mounting efficiency is further improved.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (6)
1. The blade tip grinding and switching clamp of the turbine rotor comprises a drum shaft at the front end and a rear shaft neck at the rear end, wherein the rear shaft neck is provided with an external thread part and an end face clamping groove at the rear end; it is characterized by comprising:
the front end clamp is used for connecting the drum shaft and providing a front cylindrical surface clamped by the clamp of the blade tip grinding equipment; and
a back end fixture, comprising:
the adapter sleeve comprises a connecting ring, a front flange arranged at the rear end of the connecting ring and a pressed end face at the rear end of the connecting ring, and the connecting ring is sleeved on the outer peripheral surface of the rear journal and is in interference fit with the outer peripheral surface of the rear journal;
the adapter ring comprises a rear cylindrical surface clamped by a clamp of the blade tip grinding equipment, and an end tooth and a rear flange which are arranged at the front end, wherein the rear flange is connected with the front flange through a fastener, and the end tooth is aligned with and meshed with the end surface clamping groove so as to enable the adapter ring to stop rotating in the circumferential direction; and
and the compression nut is sleeved on the external thread part at the rear end of the rear shaft neck, is in threaded connection and is pressed on the pressed end face so as to compress the adapter sleeve.
2. The turbine rotor blade tip grinding adapter fixture of claim 1, wherein a front end of the front end fixture is connected to a front end hanger, and a rear end of the adapter ring of the rear end fixture is connected to a rear end hanger.
3. The turbine rotor blade tip grinding adapter fixture of claim 1, wherein said forward flange and said aft flange are surface to surface contacted and spigot connected and fastened together by fasteners.
4. The mounting method of the turbine rotor blade tip grinding adapter fixture is characterized in that,
providing the turbine rotor blade tip grinding adapter fixture of claim 1;
heating the adapter sleeve, and keeping the temperature for a certain time to ensure that the adapter sleeve can be in clearance fit with the rear shaft neck;
mounting the adapter sleeve on the rear journal and determining a circumferential mounting angle of the adapter sleeve;
installing the compression nut to compress the adapter sleeve;
after the adapter sleeve returns to the room temperature, the compression nut is screwed again;
in the process of mounting the adapter ring on the adapter shaft sleeve, aligning the end teeth on the adapter ring and the clamping grooves of the rear shaft neck at the same time, and connecting the front flange and the rear flange by using bolts to fix the adapter ring on the adapter shaft sleeve;
connecting the nose clip to the drum shaft.
5. The method of installation of claim 4, wherein prior to installing the adaptor sleeve to the rear journal, angular positioning members are selected, the angular positioning members having elongated portions, the angular positioning members being installed to the front flange of the adaptor sleeve;
and under the condition that the elongated part of the angular positioning piece can be aligned with the end face clamping groove of the rear journal, the switching shaft sleeve is installed on the rear journal, and therefore the circumferential installation angle of the switching shaft sleeve is determined.
6. The method of mounting of claim 4, wherein locating pins are provided on the front flange and locating pin holes are provided on the rear flange; and in the process of mounting the adapter ring on the adapter shaft sleeve, the positioning pin and the positioning pin hole are aligned, and the end teeth on the adapter ring and the clamping groove of the rear shaft neck are aligned at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010857598.1A CN114083396B (en) | 2020-08-24 | 2020-08-24 | Mounting method of turbine rotor blade tip grinding adapter clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010857598.1A CN114083396B (en) | 2020-08-24 | 2020-08-24 | Mounting method of turbine rotor blade tip grinding adapter clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114083396A true CN114083396A (en) | 2022-02-25 |
| CN114083396B CN114083396B (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010857598.1A Active CN114083396B (en) | 2020-08-24 | 2020-08-24 | Mounting method of turbine rotor blade tip grinding adapter clamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284130A (en) * | 2022-07-04 | 2022-11-04 | 青岛中科国晟动力科技有限公司 | Rotor blade tip grinding method |
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| US20070084053A1 (en) * | 2005-10-17 | 2007-04-19 | Pratt & Whitney Canada Corp. | Blade tip grinding tooling |
| CN101126669A (en) * | 2007-09-30 | 2008-02-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Compressor- turbine rotor subassembly dynamic balancing jig |
| JP2011167775A (en) * | 2010-02-16 | 2011-09-01 | Nsk Ltd | Assembling method of spindle device |
| CN106392957A (en) * | 2016-12-21 | 2017-02-15 | 中国南方航空工业(集团)有限公司 | Assembly clamp and assembly method for front baffle plate of gas turbine disc |
| CN207058345U (en) * | 2017-08-04 | 2018-03-02 | 沈阳黎明法拉航空动力技术工程有限公司 | A kind of rotor assembly blade tip grinding fixture |
| CN108115564A (en) * | 2017-12-18 | 2018-06-05 | 中国航发南方工业有限公司 | Reaction wheel blade tip grinding and clamping frock |
| CN209416584U (en) * | 2018-12-21 | 2019-09-20 | 中国航发南方工业有限公司 | Centrifugal impeller combines balancing fixture and dynamic balancing equipment with turbine rotor |
| CN110328493A (en) * | 2019-06-28 | 2019-10-15 | 中国航发南方工业有限公司 | The method for controlling the axial gap between the blade tip and outer cover of centrifugal impeller |
| CN210016381U (en) * | 2019-08-13 | 2020-02-04 | 中国航发商用航空发动机有限责任公司 | Rotor assembly system and assembly chuck thereof |
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2020
- 2020-08-24 CN CN202010857598.1A patent/CN114083396B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070084053A1 (en) * | 2005-10-17 | 2007-04-19 | Pratt & Whitney Canada Corp. | Blade tip grinding tooling |
| CN101126669A (en) * | 2007-09-30 | 2008-02-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Compressor- turbine rotor subassembly dynamic balancing jig |
| JP2011167775A (en) * | 2010-02-16 | 2011-09-01 | Nsk Ltd | Assembling method of spindle device |
| CN106392957A (en) * | 2016-12-21 | 2017-02-15 | 中国南方航空工业(集团)有限公司 | Assembly clamp and assembly method for front baffle plate of gas turbine disc |
| CN207058345U (en) * | 2017-08-04 | 2018-03-02 | 沈阳黎明法拉航空动力技术工程有限公司 | A kind of rotor assembly blade tip grinding fixture |
| CN108115564A (en) * | 2017-12-18 | 2018-06-05 | 中国航发南方工业有限公司 | Reaction wheel blade tip grinding and clamping frock |
| CN209416584U (en) * | 2018-12-21 | 2019-09-20 | 中国航发南方工业有限公司 | Centrifugal impeller combines balancing fixture and dynamic balancing equipment with turbine rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284130A (en) * | 2022-07-04 | 2022-11-04 | 青岛中科国晟动力科技有限公司 | Rotor blade tip grinding method |
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| CN114083396B (en) | 2022-10-18 |
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