CN112355813B - Vertical grinding device for turbine rotor blade tips - Google Patents
Vertical grinding device for turbine rotor blade tips Download PDFInfo
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- CN112355813B CN112355813B CN202011177698.6A CN202011177698A CN112355813B CN 112355813 B CN112355813 B CN 112355813B CN 202011177698 A CN202011177698 A CN 202011177698A CN 112355813 B CN112355813 B CN 112355813B
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- ring
- hole
- pull rod
- blade
- workbench
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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
- 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
- B24B27/00—Other grinding machines or devices
- B24B27/0046—Column grinding machines
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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
- B24B27/00—Other grinding machines or devices
- B24B27/02—Bench grinders
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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
- 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 invention discloses a vertical grinding device for a turbine rotor blade tip, which comprises: the supporting base is detachably installed and fixed on a workbench of the grinding machine and used for supporting the axial end face of a turbine disc of the turbine rotor and one side, facing the workbench, of the blade tenon; the limiting compression ring is oppositely arranged right above the supporting base and is used for compressing one side of the blade tenon, which is far away from the workbench; the pull rod device sequentially penetrates through the central holes of the support base and the limiting compression ring and is used for adjusting the axial distance between the limiting compression ring and the support base to clamp and limit the turbine disc and the tenon of each blade; the radial extrusion device is oppositely connected and arranged along the axial direction through bolts at the edges of the supporting base and the limiting compression ring, and the conical surfaces are utilized to respectively radially open the upper edge plate and the lower edge plate of the blade. The invention adjusts the stretching degree through the bolt, can effectively radially stretch the front and rear edge plates of the blade, simulates the working state to be stretched tightly by centrifugal force, and has convenient clamping, safety and reliability.
Description
Technical Field
The invention relates to the field of grinding and clamping devices, in particular to a vertical grinding device for a turbine rotor blade tip.
Background
In the assembling process of a novel turboprop engine, the blade tip clearance between a turbine rotor and a working ring of an object part needs to be controlled in a key mode, and therefore the blade tip size of the turbine rotor needs to be polished before assembly so as to be matched with the object part and guarantee the clearance required by design.
The novel turboprop turbine working blade is provided with a plurality of air film holes at the front edge, the tail edge and the blade basin, and the turbine blade is arranged on a turbine disc and has axial and circumferential activity in a free state. During grinding, the working state of the engine cannot be simulated under the condition of low rotating speed (the centrifugal force of the blade is not enough to prop open the whole circle of blade), and the grinding wheel touches the blade tip to enable the blade to contract in the radial direction, so that the blade tip grinding operation cannot be completed.
Disclosure of Invention
The invention provides a vertical grinding device for a turbine rotor blade tip, which aims to solve the technical problem that the blade tip grinding operation cannot be finished under the condition of low rotating speed during the grinding of the traditional turbine blade.
The technical scheme adopted by the invention is as follows:
a turbine rotor blade tip vertical grinding device characterized in that includes:
the supporting base is detachably installed and fixed on a workbench of the grinding machine and used for supporting the axial end face of a turbine disc of the turbine rotor and one side, facing the workbench, of the blade tenon;
the limiting compression ring is oppositely arranged right above the supporting base and is used for compressing one side of the blade tenon, which is far away from the workbench;
the pull rod device sequentially penetrates through the central holes of the support base and the limiting compression ring and is used for adjusting the axial distance between the limiting compression ring and the support base to clamp and limit the turbine disc and the tenon of each blade;
the radial extrusion device is oppositely connected and arranged along the axial direction through bolts at the edges of the supporting base and the limiting compression ring, and the conical surfaces are utilized to respectively radially open the upper edge plate and the lower edge plate of the blade.
Further, the support base includes:
the base plate is detachably installed and fixed on a workbench of the grinding machine through bolts, a central stepped through hole is formed in the base plate, and the middle of the upper end face of the base plate is supported on the axial end face of a turbine disc of the turbine rotor;
the supporting ring is coaxially and detachably arranged on the upper end face of the base plate through a first screw, and the circumferential edge of the upper end face of the supporting ring is supported on one side, facing the workbench, of each blade tenon.
Further, the edge of chassis evenly is provided with a plurality of open slots that are connected through the workstation of bolt and grinding machine along circumference, and the center is provided with the shoulder hole with pull rod device matched with, evenly set up a plurality of and be used for connecting the connecting hole of support ring along the concentric circles between shoulder hole and each open slot, the up end that the chassis is located between connecting hole and the shoulder hole forms the turbine dish holding surface.
Furthermore, the stepped hole is provided with a stop step for limiting the axial position of the pull rod device, and a first pin hole penetrates through the stop step.
Further, the support ring includes:
the center of the support ring main body is provided with a rotor abdicating hole in a penetrating manner;
the second connecting screw holes are circumferentially distributed at the bottom of the support ring main body and are used for connecting the chassis;
the supporting boss extends along the radial direction and is arranged on the upper end face of the supporting ring main body and used for supporting one side of each blade tenon facing the workbench;
and the first connecting screw holes are uniformly arranged on the support boss along the circumferential direction and are used for connecting a radial extrusion device.
Further, the radial pressing device includes:
the two symmetrically arranged piston ring compression rings are respectively connected with the edges of the support ring and the limiting compression ring through screws and can move up and down along the direction vertical to the support base through rotating the screws;
the two symmetrical conical piston rings are respectively fixed on the two piston ring compression rings, the taper of the two conical piston rings is respectively matched with the taper of the upper edge plate and the taper of the lower edge plate of the blade, and the two conical piston rings are used for radially expanding the upper edge plate and the lower edge plate of the blade by utilizing the inclined planes in the up-and-down moving process of the two piston ring compression rings.
Further, the piston ring clamping ring comprises a piston ring clamping ring body provided with a center hole, a plurality of screw holes are formed in the piston ring clamping ring body along the circumferential direction, an annular conical piston ring mounting portion coaxially extends from one side of the piston ring clamping ring body, the outer diameter of the conical piston ring mounting portion is matched with the inner diameter of a conical piston ring, and the inner diameter of the conical piston ring mounting portion is matched with the outer diameter of the cylindrical surface of the joint of the support ring and the limiting clamping ring.
Furthermore, the limiting compression ring is a hollow revolution body with an isosceles trapezoid cross section, a pull rod assembly hole is formed in the top edge of the limiting compression ring in the middle, a plurality of lightening holes are formed in the waist in a hollowed mode, and a compression boss used for compressing one side, away from the workbench, of the blade tenon and a third connecting screw hole used for being connected with the radial extrusion device are arranged on the bottom edge of the limiting compression ring.
Further, the drawbar arrangement comprises:
the pull rod sequentially penetrates through the supporting base and the limiting compression ring from top to bottom, and the diameter of the lower end of the pull rod is larger than that of the central hole of the supporting base;
the second nut is connected with the pull rod, is positioned at the upper end of the limiting compression ring and is used for controlling the limiting compression ring to axially displace along the pull rod to compress one side of the blade tenon, which is far away from the workbench;
the first nut is connected with the pull rod and is positioned at the lower end of the limiting compression ring;
the pressing plate is sleeved on the pull rod in a clearance fit manner, one end of the pressing plate is abutted to the first nut, the other end of the pressing plate is embedded into the inner hole of the end, far away from the supporting base, of the turbine disc in a clearance fit manner, and the pressing plate is pushed to realize axial positioning of the turbine disc by screwing the first nut.
Further, the pull rod from top to bottom in proper order including with the tensile section of spacing clamping ring's centre bore assorted, with turbine disc hole assorted rotor hole assembly section, with the chassis assembly section of the shoulder hole assorted on chassis, with end a step and cooperate the position boss that ends that restricts the pull rod axial position, tensile section front end is provided with the external screw thread that is connected with second nut and first nut, end and be provided with the second cotter hole on the boss, it is provided with central lightening hole to run through along the axial in the pull rod.
The invention has the following beneficial effects:
the invention discloses a vertical grinding device for the tip of a turbine rotor, which comprises a supporting base, a limiting compression ring, a limiting pull rod device and an upper edge plate and a lower edge plate radial extrusion device, wherein the supporting base is detachably arranged and fixed on a workbench of a grinding machine and used for supporting the axial end face of a turbine disc of the turbine rotor and one side of a blade tenon facing the workbench, the limiting compression ring is oppositely arranged right above the supporting base and used for compressing the blade tenon away from the workbench, the limiting pull rod device is sequentially penetrated into central holes of the supporting base and the limiting compression ring and used for adjusting the axial distance between the limiting compression ring and the supporting base to clamp the turbine disc and each blade tenon, and the upper edge plate and the lower edge plate radial extrusion device are oppositely arranged at the edges of the supporting base and the limiting compression ring along the axial direction and respectively radially expand a blade by utilizing conical surfaces. According to the invention, the tightening degree is adjusted through the bolts, the front and rear edge plates of the blade can be effectively radially propped open, and the working state is simulated to be tightened by centrifugal force; the radial extrusion device is designed according to the structure of the blade, and is synchronously expanded from front to back, so that the blade is uniformly expanded in the radial direction, and the expanding degree is more uniform than that of a traditional wedge block; the supporting base is fixed on the machine tool workbench, the bottom surface of the supporting base is supported and leaned against, and vertical grinding is adopted, so that the clamping is more convenient than the disclosed clamping with a top point on a grinding machine, and the potential safety hazard of falling of the device caused by unstable clamping is avoided.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a turbine rotor blade tip vertical grinding apparatus assembly according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the assembly of a turbine rotor blade tip vertical grinding apparatus in use in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic top view of the chassis of the preferred embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the chassis of the preferred embodiment of the present invention;
figure 5 is a schematic cross-sectional view of a support ring of a preferred embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view of an expander compression ring in accordance with a preferred embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of a conical piston ring in accordance with a preferred embodiment of the present invention.
Figure 8 is a schematic cross-sectional view of a retaining collar of the preferred embodiment of the invention.
Fig. 9 is a schematic cross-sectional view of a tension rod in accordance with a preferred embodiment of the present invention.
In the figure: 1. a chassis; 101. connecting holes; 102. a first pin hole; 103. an open slot; 104. a stepped hole; 105. a stop step; 106. a turbine disk support surface; 2. a first screw; 3. a support ring; 301. a first connection screw hole; 302. a rotor abdicating hole; 303. supporting the boss; 304. a support ring body; 305. a second connection screw hole; 4. a first piston ring compression ring; 401. a conical piston ring mounting part; 402. screw holes; 403. a central bore; 5. a first conical piston ring; 6. a second conical piston ring; 7. a second screw; 8. limiting a compression ring; 801. a pull rod assembly hole; 802. lightening holes; 803. a third connecting screw hole; 804. compressing the boss; 9. pressing a plate; 10. a first nut; 11. a pull rod; 12. a second nut; 13. a second piston ring compression ring; 14. a turbine rotor. 111. A stretching section; 112. an external thread; 113. a rotor inner bore assembly section; 114. a central lightening hole; 115. a stop boss; 116. a second pin hole; 117. a chassis assembly section.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a vertical turbine rotor blade tip grinding apparatus, including:
the supporting base is detachably installed and fixed on a workbench of the grinding machine and used for supporting the axial end face of a turbine disc of the turbine rotor 14 and one side of the blade tenon facing the workbench;
the limiting compression ring 8 is oppositely arranged right above the supporting base and is used for compressing one side, away from the workbench, of the blade tenon;
the pull rod device sequentially penetrates through the central holes of the support base and the limiting compression ring 8 and is used for adjusting the axial distance between the limiting compression ring 8 and the support base to clamp and limit the turbine disc and the tenons of the blades;
the radial extrusion device is oppositely connected and arranged along the axial direction through bolts at the edges of the supporting base and the limiting compression ring 8, and the conical surfaces are utilized to respectively radially open the upper edge plate and the lower edge plate of the blade.
The vertical grinding device for the turbine rotor blade tips of the embodiment is characterized in that the vertical grinding device for the turbine rotor blade tips comprises a supporting base and a supporting base, wherein the supporting base is detachably mounted and fixed on a workbench of a grinding machine and used for supporting a turbine disc of a turbine rotor 14, an axial end face of a blade tenon faces one side of the workbench, the supporting base is arranged oppositely, one side limiting compression ring 8 used for compressing the blade tenon away from the workbench is arranged right above the supporting base, the limiting compression ring 8 sequentially penetrates through the central hole of the supporting base and the limiting compression ring 8 and is used for adjusting the limiting compression ring 8 and achieving clamping limiting pull rod devices of the turbine disc and each blade tenon, and the limiting compression ring devices are arranged oppositely along the axial direction in the edge of the supporting base and the limiting compression ring 8 and utilize conical surfaces to respectively and radially expand an upper edge plate and a lower edge plate radial extrusion device of a blade.
During processing, a turbine disc of the turbine rotor 14 is placed on the supporting base, and then the turbine disc of the turbine rotor 14 and the tenons of the blades are clamped and limited through the pull rod device and the limiting compression ring 8; then, the radial extrusion device is adjusted through the bolts, and the conical surfaces of the radial extrusion device can be used for radially expanding the upper edge plate and the lower edge plate of the blade respectively; and finally, mounting the clamped turbine rotor 14 on a vertical grinding machine workbench, and pressing the part supporting base through the bolt, so that the blade tip can be ground.
According to the invention, the tightening degree is adjusted through the bolts, the upper and lower edge plates of the blade can be effectively radially propped open, and the working state is simulated to be tightened by centrifugal force; the radial extrusion device is designed according to the structure of the blade, and the blade is synchronously unfolded from top to bottom, so that the blade is uniformly unfolded in the radial direction, and the unfolding degree is more uniform than that of a traditional wedge block; the supporting base is fixed on the machine tool workbench, the bottom surface of the supporting base is supported, vertical grinding is adopted, the clamping is more convenient than the clamping with a top point on a grinding machine, and the potential safety hazard that the device falls off due to unstable clamping does not exist.
As shown in fig. 3 and 4, in a preferred embodiment of the present invention, the support base includes:
the chassis 1 is detachably installed and fixed on a workbench of a grinding machine through bolts, a central stepped through hole is formed in the chassis 1, and the middle of the upper end face of the chassis is supported on the axial end face of a turbine disc of the turbine rotor 14;
and the support ring 3 is coaxially and detachably arranged on the upper end face of the chassis 1 through a first screw 2, and the circumferential edge of the upper end face of the support ring is supported on one side of each blade tenon facing the workbench.
In the embodiment, the base plate 1 can be quickly and reliably connected with a workbench of a grinding machine and is in tension fit with the pull rod device, and meanwhile, the base plate is also used for supporting the axial end face of the turbine disc of the turbine rotor 14 to realize accurate axial positioning of the turbine disc; simultaneously, this embodiment can realize the support installation to the blade tenon of different model turbine rotor 14 through setting up detachable support ring 3, effectively enlarges the application scope of device.
In a preferred embodiment of the invention, a plurality of open grooves 103 connected with a workbench of a grinding machine through bolts are uniformly arranged along the circumferential direction of the edge of the base plate 1, a stepped hole 104 matched with a pull rod device is arranged at the center of the base plate, a plurality of connecting holes 101 for connecting with a support ring 3 are uniformly arranged between the stepped hole 104 and each open groove 103 along a concentric circle, and a turbine plate support surface 106 is formed on the upper end surface of the base plate 1 between the connecting holes 101 and the stepped hole 104.
In the preferred embodiment of the present invention, the stepped hole 104 is provided with a stop step 105 for limiting the axial position of the drawbar arrangement, and the first pin hole 102 is formed through the stop step 105.
In this embodiment, the chassis 1 realizes axial positioning of the pull rod device through the stop step 105 in the stepped hole 104, and meanwhile, the accurate positioning when the chassis 1 is assembled with the pull rod device is realized through the first pin hole 102 penetrating the stop step 105, so that axial deviation and relative rotation are prevented from occurring in the machining process, and the subsequent grinding precision and stability of the blade tip are ensured.
In a preferred embodiment of the invention, as shown in fig. 5, the support ring 3 comprises:
the support ring comprises a support ring main body 304, wherein a rotor abdicating hole 302 penetrates through the center of the support ring main body 304;
second connecting screw holes 305 circumferentially distributed at the bottom of the support ring body 304 for connecting the chassis 1;
a support boss 303 extending in a radial direction and provided on an upper end surface of the support ring main body 304 for supporting a side of each blade tenon facing the workbench;
and the first connecting screw holes 301 are uniformly arranged on the support boss 303 along the circumferential direction and are used for connecting a radial extrusion device.
In this embodiment, the support ring 3 can be connected to the chassis 1 and the radial extrusion device by the first screw 2 and the second screw 7, respectively, and has a simple structure and convenient assembly and disassembly.
In a preferred embodiment of the present invention, the radial pressing means comprises:
the two symmetrically arranged piston ring compression rings are respectively connected with the edges of the support ring 3 and the limiting compression ring 8 through screws and can move up and down along the direction vertical to the support base through rotating the screws;
the two symmetrical conical piston rings are respectively fixed on the two piston ring compression rings, the taper of the two conical piston rings is respectively matched with the taper of the upper edge plate and the taper of the lower edge plate of the blade, and the two conical piston rings are used for radially expanding the upper edge plate and the lower edge plate of the blade by utilizing the inclined planes in the up-and-down moving process of the two piston ring compression rings.
Specifically, the radial pressing device includes:
the first piston ring pressing ring 4 is connected with the edge of the support ring 3 through a screw and can move up and down along the direction vertical to the support base through rotating the screw;
the first conical piston ring 5 is made of polyurethane, is fixedly arranged on the first piston ring pressing ring 4, is used for radially expanding an upper edge plate of the blade by utilizing an inclined plane in the up-and-down moving process of the first piston ring pressing ring 4, is tightly supported by centrifugal force in a simulated working state, does not scratch the surfaces of a blade tenon and a turbine disc mortise, can adjust the degree of tightening through a second screw 7, and is simple, convenient and quick;
the second piston ring pressing ring 13 is connected with the edge of the limiting pressing ring 8 through a screw and can move up and down along the direction vertical to the supporting base through rotating the screw;
the second conical piston ring 6 is made of polyurethane, is fixedly arranged on the second piston ring pressing ring 13 and is used for radially expanding the lower edge plate of the blade by utilizing an inclined plane in the process that the second piston ring pressing ring 13 moves up and down, the working state is simulated to be tightly expanded by centrifugal force, the surfaces of a blade tenon and a turbine disc mortise are not scraped, and the expansion degree can be adjusted by the second screw 7, so that the method is simple, convenient and quick;
as shown in fig. 6, in a preferred embodiment of the present invention, the first piston ring 4 includes a piston ring body having a central hole 403, the piston ring body is circumferentially provided with a plurality of screw holes 402, one side of the piston ring body is coaxially extended with an annular conical piston ring mounting portion 401, an outer diameter of the conical piston ring mounting portion 401 matches with an inner diameter of the conical piston ring, and an adhesive may be applied between the conical piston ring mounting portion 401 and the conical piston ring to improve the connection firmness; the inner diameter of the conical piston ring mounting part 401 is respectively matched with the outer diameter of the cylindrical surface at the joint of the support ring 3 and the limiting compression ring 8 to form sliding fit, so that the first piston ring compression ring 4 can move up and down, and the phenomenon of axis deviation cannot occur in the moving process. The operation of the second piston ring 13 is similar to that of the first piston ring 4, and will not be described in detail.
As shown in fig. 8, in the preferred embodiment of the present invention, the limiting ring 8 is a hollow rotating body with an isosceles trapezoid cross section, a pull rod assembly hole 801 is centrally disposed on a top side of the limiting ring, a plurality of lightening holes 802 are hollowed in a waist portion of the limiting ring, and a pressing boss 804 for pressing one side of the blade tenon away from the working platform and a third connecting screw hole 803 for connecting a radial extrusion device are disposed on a bottom side of the limiting ring.
In this embodiment, the limiting compression ring 8 is a hollow revolution body with an isosceles trapezoid cross section, and meanwhile, the waist of the hollow revolution body is provided with a plurality of lightening holes 802 in a hollow mode, so that the dead weight and materials of the limiting compression ring 8 can be reduced, the cost is saved, and the carrying is convenient.
As shown in fig. 9, in a preferred embodiment of the present invention, the drawbar arrangement comprises:
the pull rod 11 sequentially penetrates through the supporting base and the limiting compression ring 8 from top to bottom, and the diameter of the lower end of the pull rod 11 is larger than that of a central hole of the supporting base;
the second nut 12 is connected with the pull rod 11, is positioned at the upper end of the limiting compression ring 8 and is used for controlling the limiting compression ring 8 to axially displace along the pull rod 11 to compress one side of the blade tenon, which is far away from the workbench;
the first nut 10 is connected with the pull rod 11 and is positioned at the lower end of the limiting compression ring 8;
and the pressing plate 9 is sleeved on the pull rod 11 in a clearance fit manner, one end of the pressing plate is abutted against the first nut 10, the other end of the pressing plate is embedded into an inner hole at one end of the turbine disc far away from the supporting base in a clearance fit manner, and the pressing plate 9 is pushed to realize axial positioning of the turbine disc by screwing the first nut 10.
In the embodiment, the pull rod 11 is matched with the second nut 12 and the limiting compression ring 8, and the position of the limiting compression ring 8 can be adjusted to clamp and position the blade tenon; and the pull rod 11 is matched with the first nut 10 and the pressure plate 9, so that the axial positioning of the turbine disc can be realized, wherein the pressure plate 9 is a hollow stepped ring structure, the large end of the pressure plate is abutted to the first nut 10, the small end of the pressure plate extends into the inner hole of the turbine disc, and the axial and radial positioning of the turbine disc is realized by combining the shoulder of the pressure plate.
As shown in fig. 9, in a preferred embodiment of the present invention, the pull rod 11 sequentially includes, from top to bottom, a stretching section 111 matched with the central hole of the position-limiting compression ring 8, a rotor inner hole assembling section 113 matched with the inner hole of the turbine disk, a chassis assembling section 117 matched with the stepped hole 104 of the chassis 1, and a stop boss 115 matched with the stop step 105 to limit the axial position of the pull rod 11, the front end of the stretching section 111 is provided with an external thread 112 connected with the second nut 12 and the first nut 10, the stop boss 115 is provided with a second pin hole 116, and the pull rod 11 is provided with a central weight-reducing hole 114 axially penetrating therethrough.
In this embodiment, the pull rod 11 is provided with the stretching section 111, the rotor bore assembling section 113, the chassis assembling section 117, the stop boss 115 and the external thread 112 respectively, the external thread 112 and the stop boss 115 cooperate with the second nut 12, the first nut 10, the stop step 105 respectively to realize axial locking, and simultaneously, the pull rod 11 utilizes the cylindrical surfaces of the stretching section 111, the rotor bore assembling section 113, and the chassis assembling section 117 to effectively control the coaxiality of the pull rod 11 and the limiting compression ring 8, the turbine disc, and the chassis 1, thereby ensuring the blade tip grinding precision. In addition, a second pin hole 116 is formed in the stopping boss 115, and the second pin hole 116 is matched with the first pin hole 102 in the chassis 1, so that accurate positioning during assembly of the chassis 1 and the pull rod 11 is realized, axial deviation and relative rotation between the chassis 1 and the pull rod 11 in the machining process are further prevented, and subsequent grinding precision and stability of blade tips are ensured. In order to further reduce the self-weight, a central lightening hole 114 is axially arranged in the pull rod 11 of the embodiment in a penetrating manner, so that the self-weight and the material consumption of the pull rod 11 can be reduced, the cost is saved, and the carrying is convenient.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A turbine rotor blade tip vertical grinding device characterized in that includes:
the supporting base is detachably installed and fixed on a workbench of the grinding machine and used for supporting the axial end face of a turbine disc of the turbine rotor (14) and one side of the blade tenon facing the workbench;
the limiting compression ring (8) is oppositely arranged right above the supporting base and is used for compressing one side, away from the workbench, of the blade tenon;
the pull rod device sequentially penetrates through the support base and the central holes of the limiting compression rings (8) and is used for adjusting the axial distance between the limiting compression rings (8) and the support base to clamp and limit the turbine disc and the tenons of the blades;
the radial extrusion device is oppositely connected and arranged at the edges of the supporting base and the limiting compression ring (8) along the axial direction through bolts, and radially expands the upper edge plate and the lower edge plate of the blade by utilizing conical surfaces;
the draw bar apparatus includes:
the pull rod (11) sequentially penetrates through the supporting base and the limiting compression ring (8) from top to bottom, and the diameter of the lower end of the pull rod (11) is larger than that of the central hole of the supporting base;
the second nut (12) is connected with the pull rod (11), is positioned at the upper end of the limiting compression ring (8), and is used for controlling the limiting compression ring (8) to axially displace along the pull rod (11) to compress one side of the blade tenon, which is far away from the workbench;
the first nut (10) is connected with the pull rod (11) and is positioned at the lower end of the limiting compression ring (8);
the pressing plate (9) is sleeved on the pull rod (11) in a clearance fit mode, one end of the pressing plate is abutted to the first nut (10), the other end of the pressing plate is embedded into the inner hole, away from one end of the supporting base, of the turbine disc in a clearance fit mode, and the pressing plate (9) is pushed to achieve axial positioning of the turbine disc through screwing the first nut (10).
2. The turbine rotor blade tip vertical grinding apparatus of claim 1, wherein the support base comprises:
the chassis (1) is detachably installed and fixed on a workbench of the grinding machine through bolts, a central stepped hole (104) is formed in the chassis, the stepped hole (104) is a through hole, and the middle of the upper end face of the stepped hole is supported on the axial end face of a turbine disc of the turbine rotor (14);
the supporting ring (3) is coaxially and detachably arranged on the upper end face of the chassis (1) through a first screw (2), and the circumferential edge of the upper end face of the supporting ring is supported on one side, facing the workbench, of each blade tenon.
3. The vertical turbine rotor blade tip grinding apparatus of claim 2,
the edge of chassis (1) evenly is provided with a plurality of open slots (103) that are connected through the workstation of bolt and grinding machine along circumference, and the center is provided with and pull rod device matched with shoulder hole (104), evenly set up connecting hole (101) a plurality of and be used for connecting support ring (3) along concentric circles between shoulder hole (104) and each open slot (103), the up end that chassis (1) is located between connecting hole (101) and shoulder hole (104) forms turbine dish holding surface (106).
4. The vertical turbine rotor blade tip grinding device according to claim 3, wherein the stepped hole (104) is provided with a stop step (105) for limiting the axial position of the pull rod device, and the stop step (105) is provided with the first pin hole (102) in a penetrating manner.
5. The vertical turbine rotor blade tip grinding device according to claim 2, wherein the support ring (3) comprises:
the rotor support ring comprises a support ring main body (304), wherein a rotor abdicating hole (302) penetrates through the center of the support ring main body (304);
second connecting screw holes (305) which are circumferentially distributed at the bottom of the support ring main body (304) and are used for connecting the chassis (1);
a support boss (303) extending along the radial direction and arranged on the upper end face of the support ring main body (304) and used for supporting one side of each blade tenon facing the workbench;
the first connecting screw holes (301) are uniformly formed in the supporting boss (303) along the circumferential direction and are used for connecting a radial extrusion device.
6. The vertical turbine rotor blade tip grinding apparatus of claim 2,
the radial pressing device includes:
the two symmetrically arranged piston ring compression rings are respectively connected with the edges of the support ring (3) and the limiting compression ring (8) through screws and can move up and down along the direction vertical to the support base through rotating the screws;
the two symmetrical conical piston rings are respectively fixed on the two piston ring compression rings, the taper of the two conical piston rings is respectively matched with the taper of the upper edge plate and the taper of the lower edge plate of the blade, and the two conical piston rings are used for radially expanding the upper edge plate and the lower edge plate of the blade by utilizing the inclined planes in the up-and-down moving process of the two piston ring compression rings.
7. The vertical grinding device for the turbine rotor blade tip according to claim 6 is characterized in that the piston ring pressing ring comprises a piston ring pressing ring body provided with a central hole (403), a plurality of screw holes (402) are formed in the piston ring pressing ring body along the circumferential direction, an annular conical piston ring mounting portion (401) is coaxially arranged on one side of the piston ring pressing ring body in an extending mode, the outer diameter of the conical piston ring mounting portion (401) is matched with the inner diameter of a conical piston ring, and the inner diameter of the conical piston ring mounting portion is respectively matched with the outer diameter of a cylindrical surface of the joint of the support ring (3) and the limiting pressing ring (8).
8. The vertical grinding device for the turbine rotor blade tip as recited in claim 1, wherein the limiting compression ring (8) is a hollow revolution body with an isosceles trapezoid cross section, a pull rod assembly hole (801) is arranged in the middle of the top side of the limiting compression ring, a plurality of lightening holes (802) are arranged in the hollow waist portion, and a compression boss (804) used for compressing one side of the blade tenon far away from the workbench and a third connecting screw hole (803) used for connecting a radial extrusion device are arranged on the bottom side of the limiting compression ring.
9. The vertical turbine rotor blade tip grinding apparatus of claim 4,
pull rod (11) from top to bottom in proper order including with the tensile section (111) of the centre bore assorted of spacing clamping ring (8), with turbine disc hole assorted rotor hole assembly section (113), with shoulder hole (104) assorted chassis assembly section (117) of chassis (1), with end a step (105) cooperate and restrict pull rod (11) axial position end a boss (115), tensile section (111) front end is provided with external screw thread (112) that are connected with second nut (12) and first nut (10), end and be provided with second cotter hole (116) on boss (115), it is provided with central lightening hole (114) to run through along the axial in pull rod (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177698.6A CN112355813B (en) | 2020-10-29 | 2020-10-29 | Vertical grinding device for turbine rotor blade tips |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177698.6A CN112355813B (en) | 2020-10-29 | 2020-10-29 | Vertical grinding device for turbine rotor blade tips |
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| CN112355813A CN112355813A (en) | 2021-02-12 |
| CN112355813B true CN112355813B (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011177698.6A Active CN112355813B (en) | 2020-10-29 | 2020-10-29 | Vertical grinding device for turbine rotor blade tips |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118081543A (en) * | 2024-04-26 | 2024-05-28 | 国营川西机器厂 | Blade tip grinding tenon tightening device for high-pressure turbine blade of aero-engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090006272U (en) * | 2007-12-20 | 2009-06-24 | 주식회사 한국가스기술공사 | Impeller clamping apparatus having pivot hole |
| CN102935610B (en) * | 2012-11-07 | 2014-07-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Engine rotor blisk blade-tip curved surface processing device and method |
| CN106737012B (en) * | 2016-12-21 | 2018-11-27 | 中国南方航空工业(集团)有限公司 | Turbine rotor grinder 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 |
| CN108127547A (en) * | 2017-12-20 | 2018-06-08 | 中国航发动力股份有限公司 | A kind of centrifugal impeller extrusion honing device and method |
| CN209402367U (en) * | 2019-02-22 | 2019-09-17 | 汕头市佳力微电机有限公司 | A kind of drag cup micro-motor rotor adhesive positioning device |
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